Prepare frontend for multiple graphics APIs (#6347)
* externals: Update dynarmic * settings: Introduce GraphicsAPI enum * For now it's OpenGL only but will be expanded upon later * citra_qt: Introduce backend agnostic context management * Mostly a direct port from yuzu * core: Simplify context acquire * settings: Add option to create debug contexts * renderer_opengl: Abstract initialization to Driver * This commit also updates glad and adds some useful extensions which we will use in part 2 * Rasterizer construction is moved to the specific renderer instead of RendererBase. Software rendering has been disable to achieve this but will be brought back in the next commit. * video_core: Remove Init/Shutdown methods from renderer * The constructor and destructor can do the same job * In addition move opengl function loading to Qt since SDL already does this. Also remove ErrorVideoCore which is never reached * citra_qt: Decouple software renderer from opengl part 1 * citra: Decouple software renderer from opengl part 2 * android: Decouple software renderer from opengl part 3 * swrasterizer: Decouple software renderer from opengl part 4 * This commit simply enforces the renderer naming conventions in the software renderer * video_core: Move RendererBase to VideoCore * video_core: De-globalize screenshot state * video_core: Pass system to the renderers * video_core: Commonize shader uniform data * video_core: Abstract backend agnostic rasterizer operations * bootmanager: Remove references to OpenGL for macOS OpenGL macOS headers definitions clash heavily with each other * citra_qt: Proper title for api settings * video_core: Reduce boost usage * bootmanager: Fix hide mouse option Remove event handlers from RenderWidget for events that are already handled by the parent GRenderWindow. Also enable mouse tracking on the RenderWidget. * android: Remove software from graphics api list * code: Address review comments * citra: Port per-game settings read * Having to update the default value for all backends is a pain so lets centralize it * android: Rename to OpenGLES --------- Co-authored-by: MerryMage <MerryMage@users.noreply.github.com> Co-authored-by: Vitor Kiguchi <vitor-kiguchi@hotmail.com>
This commit is contained in:
GPUCode
901
src/video_core/renderer_software/rasterizer.cpp
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901
src/video_core/renderer_software/rasterizer.cpp
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@@ -0,0 +1,901 @@
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// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <array>
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#include <cmath>
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#include <tuple>
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#include "common/assert.h"
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#include "common/bit_field.h"
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#include "common/color.h"
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#include "common/common_types.h"
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#include "common/logging/log.h"
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#include "common/microprofile.h"
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#include "common/quaternion.h"
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#include "common/vector_math.h"
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#include "core/hw/gpu.h"
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#include "core/memory.h"
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#include "video_core/debug_utils/debug_utils.h"
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#include "video_core/pica_state.h"
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#include "video_core/pica_types.h"
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#include "video_core/regs_framebuffer.h"
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#include "video_core/regs_rasterizer.h"
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#include "video_core/regs_texturing.h"
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#include "video_core/renderer_software/rasterizer.h"
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#include "video_core/renderer_software/sw_framebuffer.h"
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#include "video_core/renderer_software/sw_lighting.h"
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#include "video_core/renderer_software/sw_proctex.h"
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#include "video_core/renderer_software/sw_texturing.h"
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#include "video_core/shader/shader.h"
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#include "video_core/texture/texture_decode.h"
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#include "video_core/utils.h"
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#include "video_core/video_core.h"
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namespace Pica::Rasterizer {
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// NOTE: Assuming that rasterizer coordinates are 12.4 fixed-point values
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struct Fix12P4 {
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Fix12P4() {}
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Fix12P4(u16 val) : val(val) {}
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static u16 FracMask() {
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return 0xF;
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}
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static u16 IntMask() {
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return (u16)~0xF;
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}
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operator u16() const {
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return val;
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}
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bool operator<(const Fix12P4& oth) const {
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return (u16) * this < (u16)oth;
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}
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private:
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u16 val;
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};
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/**
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* Calculate signed area of the triangle spanned by the three argument vertices.
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* The sign denotes an orientation.
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*
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* @todo define orientation concretely.
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*/
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static int SignedArea(const Common::Vec2<Fix12P4>& vtx1, const Common::Vec2<Fix12P4>& vtx2,
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const Common::Vec2<Fix12P4>& vtx3) {
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const auto vec1 = Common::MakeVec(vtx2 - vtx1, 0);
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const auto vec2 = Common::MakeVec(vtx3 - vtx1, 0);
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// TODO: There is a very small chance this will overflow for sizeof(int) == 4
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return Common::Cross(vec1, vec2).z;
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};
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/// Convert a 3D vector for cube map coordinates to 2D texture coordinates along with the face name
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static std::tuple<float24, float24, float24, PAddr> ConvertCubeCoord(float24 u, float24 v,
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float24 w,
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const TexturingRegs& regs) {
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const float abs_u = std::abs(u.ToFloat32());
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const float abs_v = std::abs(v.ToFloat32());
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const float abs_w = std::abs(w.ToFloat32());
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float24 x, y, z;
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PAddr addr;
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if (abs_u > abs_v && abs_u > abs_w) {
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if (u > float24::FromFloat32(0)) {
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addr = regs.GetCubePhysicalAddress(TexturingRegs::CubeFace::PositiveX);
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y = -v;
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} else {
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addr = regs.GetCubePhysicalAddress(TexturingRegs::CubeFace::NegativeX);
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y = v;
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}
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x = -w;
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z = u;
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} else if (abs_v > abs_w) {
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if (v > float24::FromFloat32(0)) {
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addr = regs.GetCubePhysicalAddress(TexturingRegs::CubeFace::PositiveY);
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x = u;
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} else {
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addr = regs.GetCubePhysicalAddress(TexturingRegs::CubeFace::NegativeY);
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x = -u;
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}
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y = w;
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z = v;
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} else {
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if (w > float24::FromFloat32(0)) {
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addr = regs.GetCubePhysicalAddress(TexturingRegs::CubeFace::PositiveZ);
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y = -v;
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} else {
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addr = regs.GetCubePhysicalAddress(TexturingRegs::CubeFace::NegativeZ);
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y = v;
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}
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x = u;
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z = w;
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}
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float24 z_abs = float24::FromFloat32(std::abs(z.ToFloat32()));
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const float24 half = float24::FromFloat32(0.5f);
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return std::make_tuple(x / z * half + half, y / z * half + half, z_abs, addr);
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}
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MICROPROFILE_DEFINE(GPU_Rasterization, "GPU", "Rasterization", MP_RGB(50, 50, 240));
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/**
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* Helper function for ProcessTriangle with the "reversed" flag to allow for implementing
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* culling via recursion.
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*/
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static void ProcessTriangleInternal(const Vertex& v0, const Vertex& v1, const Vertex& v2,
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bool reversed = false) {
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const auto& regs = g_state.regs;
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MICROPROFILE_SCOPE(GPU_Rasterization);
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// vertex positions in rasterizer coordinates
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static auto FloatToFix = [](float24 flt) {
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// TODO: Rounding here is necessary to prevent garbage pixels at
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// triangle borders. Is it that the correct solution, though?
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return Fix12P4(static_cast<unsigned short>(round(flt.ToFloat32() * 16.0f)));
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};
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static auto ScreenToRasterizerCoordinates = [](const Common::Vec3<float24>& vec) {
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return Common::Vec3<Fix12P4>{FloatToFix(vec.x), FloatToFix(vec.y), FloatToFix(vec.z)};
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};
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Common::Vec3<Fix12P4> vtxpos[3]{ScreenToRasterizerCoordinates(v0.screenpos),
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ScreenToRasterizerCoordinates(v1.screenpos),
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ScreenToRasterizerCoordinates(v2.screenpos)};
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if (regs.rasterizer.cull_mode == RasterizerRegs::CullMode::KeepAll) {
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// Make sure we always end up with a triangle wound counter-clockwise
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if (!reversed && SignedArea(vtxpos[0].xy(), vtxpos[1].xy(), vtxpos[2].xy()) <= 0) {
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ProcessTriangleInternal(v0, v2, v1, true);
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return;
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}
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} else {
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if (!reversed && regs.rasterizer.cull_mode == RasterizerRegs::CullMode::KeepClockWise) {
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// Reverse vertex order and use the CCW code path.
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ProcessTriangleInternal(v0, v2, v1, true);
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return;
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}
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// Cull away triangles which are wound clockwise.
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if (SignedArea(vtxpos[0].xy(), vtxpos[1].xy(), vtxpos[2].xy()) <= 0)
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return;
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}
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u16 min_x = std::min({vtxpos[0].x, vtxpos[1].x, vtxpos[2].x});
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u16 min_y = std::min({vtxpos[0].y, vtxpos[1].y, vtxpos[2].y});
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u16 max_x = std::max({vtxpos[0].x, vtxpos[1].x, vtxpos[2].x});
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u16 max_y = std::max({vtxpos[0].y, vtxpos[1].y, vtxpos[2].y});
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// Convert the scissor box coordinates to 12.4 fixed point
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u16 scissor_x1 = (u16)(regs.rasterizer.scissor_test.x1 << 4);
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u16 scissor_y1 = (u16)(regs.rasterizer.scissor_test.y1 << 4);
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// x2,y2 have +1 added to cover the entire sub-pixel area
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u16 scissor_x2 = (u16)((regs.rasterizer.scissor_test.x2 + 1) << 4);
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u16 scissor_y2 = (u16)((regs.rasterizer.scissor_test.y2 + 1) << 4);
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if (regs.rasterizer.scissor_test.mode == RasterizerRegs::ScissorMode::Include) {
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// Calculate the new bounds
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min_x = std::max(min_x, scissor_x1);
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min_y = std::max(min_y, scissor_y1);
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max_x = std::min(max_x, scissor_x2);
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max_y = std::min(max_y, scissor_y2);
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}
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min_x &= Fix12P4::IntMask();
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min_y &= Fix12P4::IntMask();
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max_x = ((max_x + Fix12P4::FracMask()) & Fix12P4::IntMask());
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max_y = ((max_y + Fix12P4::FracMask()) & Fix12P4::IntMask());
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// Triangle filling rules: Pixels on the right-sided edge or on flat bottom edges are not
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// drawn. Pixels on any other triangle border are drawn. This is implemented with three bias
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// values which are added to the barycentric coordinates w0, w1 and w2, respectively.
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// NOTE: These are the PSP filling rules. Not sure if the 3DS uses the same ones...
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auto IsRightSideOrFlatBottomEdge = [](const Common::Vec2<Fix12P4>& vtx,
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const Common::Vec2<Fix12P4>& line1,
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const Common::Vec2<Fix12P4>& line2) {
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if (line1.y == line2.y) {
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// just check if vertex is above us => bottom line parallel to x-axis
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return vtx.y < line1.y;
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} else {
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// check if vertex is on our left => right side
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// TODO: Not sure how likely this is to overflow
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return (int)vtx.x < (int)line1.x + ((int)line2.x - (int)line1.x) *
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((int)vtx.y - (int)line1.y) /
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((int)line2.y - (int)line1.y);
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}
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};
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int bias0 =
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IsRightSideOrFlatBottomEdge(vtxpos[0].xy(), vtxpos[1].xy(), vtxpos[2].xy()) ? -1 : 0;
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int bias1 =
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IsRightSideOrFlatBottomEdge(vtxpos[1].xy(), vtxpos[2].xy(), vtxpos[0].xy()) ? -1 : 0;
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int bias2 =
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IsRightSideOrFlatBottomEdge(vtxpos[2].xy(), vtxpos[0].xy(), vtxpos[1].xy()) ? -1 : 0;
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auto w_inverse = Common::MakeVec(v0.pos.w, v1.pos.w, v2.pos.w);
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auto textures = regs.texturing.GetTextures();
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auto tev_stages = regs.texturing.GetTevStages();
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bool stencil_action_enable =
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g_state.regs.framebuffer.output_merger.stencil_test.enable &&
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g_state.regs.framebuffer.framebuffer.depth_format == FramebufferRegs::DepthFormat::D24S8;
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const auto stencil_test = g_state.regs.framebuffer.output_merger.stencil_test;
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// Enter rasterization loop, starting at the center of the topleft bounding box corner.
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// TODO: Not sure if looping through x first might be faster
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for (u16 y = min_y + 8; y < max_y; y += 0x10) {
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for (u16 x = min_x + 8; x < max_x; x += 0x10) {
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// Do not process the pixel if it's inside the scissor box and the scissor mode is set
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// to Exclude
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if (regs.rasterizer.scissor_test.mode == RasterizerRegs::ScissorMode::Exclude) {
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if (x >= scissor_x1 && x < scissor_x2 && y >= scissor_y1 && y < scissor_y2)
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continue;
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}
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// Calculate the barycentric coordinates w0, w1 and w2
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int w0 = bias0 + SignedArea(vtxpos[1].xy(), vtxpos[2].xy(), {x, y});
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int w1 = bias1 + SignedArea(vtxpos[2].xy(), vtxpos[0].xy(), {x, y});
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int w2 = bias2 + SignedArea(vtxpos[0].xy(), vtxpos[1].xy(), {x, y});
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int wsum = w0 + w1 + w2;
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// If current pixel is not covered by the current primitive
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if (w0 < 0 || w1 < 0 || w2 < 0)
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continue;
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auto baricentric_coordinates =
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Common::MakeVec(float24::FromFloat32(static_cast<float>(w0)),
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float24::FromFloat32(static_cast<float>(w1)),
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float24::FromFloat32(static_cast<float>(w2)));
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float24 interpolated_w_inverse =
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float24::FromFloat32(1.0f) / Common::Dot(w_inverse, baricentric_coordinates);
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// interpolated_z = z / w
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float interpolated_z_over_w =
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(v0.screenpos[2].ToFloat32() * w0 + v1.screenpos[2].ToFloat32() * w1 +
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v2.screenpos[2].ToFloat32() * w2) /
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wsum;
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// Not fully accurate. About 3 bits in precision are missing.
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// Z-Buffer (z / w * scale + offset)
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float depth_scale = float24::FromRaw(regs.rasterizer.viewport_depth_range).ToFloat32();
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float depth_offset =
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float24::FromRaw(regs.rasterizer.viewport_depth_near_plane).ToFloat32();
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float depth = interpolated_z_over_w * depth_scale + depth_offset;
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// Potentially switch to W-Buffer
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if (regs.rasterizer.depthmap_enable ==
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Pica::RasterizerRegs::DepthBuffering::WBuffering) {
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// W-Buffer (z * scale + w * offset = (z / w * scale + offset) * w)
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depth *= interpolated_w_inverse.ToFloat32() * wsum;
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}
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// Clamp the result
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depth = std::clamp(depth, 0.0f, 1.0f);
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// Perspective correct attribute interpolation:
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// Attribute values cannot be calculated by simple linear interpolation since
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// they are not linear in screen space. For example, when interpolating a
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// texture coordinate across two vertices, something simple like
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// u = (u0*w0 + u1*w1)/(w0+w1)
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// will not work. However, the attribute value divided by the
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// clipspace w-coordinate (u/w) and and the inverse w-coordinate (1/w) are linear
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// in screenspace. Hence, we can linearly interpolate these two independently and
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// calculate the interpolated attribute by dividing the results.
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// I.e.
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// u_over_w = ((u0/v0.pos.w)*w0 + (u1/v1.pos.w)*w1)/(w0+w1)
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// one_over_w = (( 1/v0.pos.w)*w0 + ( 1/v1.pos.w)*w1)/(w0+w1)
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// u = u_over_w / one_over_w
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//
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// The generalization to three vertices is straightforward in baricentric coordinates.
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auto GetInterpolatedAttribute = [&](float24 attr0, float24 attr1, float24 attr2) {
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auto attr_over_w = Common::MakeVec(attr0, attr1, attr2);
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float24 interpolated_attr_over_w =
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Common::Dot(attr_over_w, baricentric_coordinates);
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return interpolated_attr_over_w * interpolated_w_inverse;
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};
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Common::Vec4<u8> primary_color{
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static_cast<u8>(round(
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GetInterpolatedAttribute(v0.color.r(), v1.color.r(), v2.color.r()).ToFloat32() *
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255)),
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static_cast<u8>(round(
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GetInterpolatedAttribute(v0.color.g(), v1.color.g(), v2.color.g()).ToFloat32() *
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255)),
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static_cast<u8>(round(
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GetInterpolatedAttribute(v0.color.b(), v1.color.b(), v2.color.b()).ToFloat32() *
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255)),
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static_cast<u8>(round(
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GetInterpolatedAttribute(v0.color.a(), v1.color.a(), v2.color.a()).ToFloat32() *
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255)),
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};
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Common::Vec2<float24> uv[3];
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uv[0].u() = GetInterpolatedAttribute(v0.tc0.u(), v1.tc0.u(), v2.tc0.u());
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||||
uv[0].v() = GetInterpolatedAttribute(v0.tc0.v(), v1.tc0.v(), v2.tc0.v());
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uv[1].u() = GetInterpolatedAttribute(v0.tc1.u(), v1.tc1.u(), v2.tc1.u());
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||||
uv[1].v() = GetInterpolatedAttribute(v0.tc1.v(), v1.tc1.v(), v2.tc1.v());
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uv[2].u() = GetInterpolatedAttribute(v0.tc2.u(), v1.tc2.u(), v2.tc2.u());
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||||
uv[2].v() = GetInterpolatedAttribute(v0.tc2.v(), v1.tc2.v(), v2.tc2.v());
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||||
|
||||
Common::Vec4<u8> texture_color[4]{};
|
||||
for (int i = 0; i < 3; ++i) {
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||||
const auto& texture = textures[i];
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||||
if (!texture.enabled)
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continue;
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||||
|
||||
if (texture.config.address == 0) {
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||||
texture_color[i] = {0, 0, 0, 255};
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||||
continue;
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||||
}
|
||||
|
||||
int coordinate_i =
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||||
(i == 2 && regs.texturing.main_config.texture2_use_coord1) ? 1 : i;
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||||
float24 u = uv[coordinate_i].u();
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||||
float24 v = uv[coordinate_i].v();
|
||||
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||||
// Only unit 0 respects the texturing type (according to 3DBrew)
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||||
// TODO: Refactor so cubemaps and shadowmaps can be handled
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||||
PAddr texture_address = texture.config.GetPhysicalAddress();
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||||
float24 shadow_z;
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||||
if (i == 0) {
|
||||
switch (texture.config.type) {
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||||
case TexturingRegs::TextureConfig::Texture2D:
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||||
break;
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||||
case TexturingRegs::TextureConfig::ShadowCube:
|
||||
case TexturingRegs::TextureConfig::TextureCube: {
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||||
auto w = GetInterpolatedAttribute(v0.tc0_w, v1.tc0_w, v2.tc0_w);
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||||
std::tie(u, v, shadow_z, texture_address) =
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||||
ConvertCubeCoord(u, v, w, regs.texturing);
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||||
break;
|
||||
}
|
||||
case TexturingRegs::TextureConfig::Projection2D: {
|
||||
auto tc0_w = GetInterpolatedAttribute(v0.tc0_w, v1.tc0_w, v2.tc0_w);
|
||||
u /= tc0_w;
|
||||
v /= tc0_w;
|
||||
break;
|
||||
}
|
||||
case TexturingRegs::TextureConfig::Shadow2D: {
|
||||
auto tc0_w = GetInterpolatedAttribute(v0.tc0_w, v1.tc0_w, v2.tc0_w);
|
||||
if (!regs.texturing.shadow.orthographic) {
|
||||
u /= tc0_w;
|
||||
v /= tc0_w;
|
||||
}
|
||||
|
||||
shadow_z = float24::FromFloat32(std::abs(tc0_w.ToFloat32()));
|
||||
break;
|
||||
}
|
||||
case TexturingRegs::TextureConfig::Disabled:
|
||||
continue; // skip this unit and continue to the next unit
|
||||
default:
|
||||
LOG_ERROR(HW_GPU, "Unhandled texture type {:x}", (int)texture.config.type);
|
||||
UNIMPLEMENTED();
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
int s = (int)(u * float24::FromFloat32(static_cast<float>(texture.config.width)))
|
||||
.ToFloat32();
|
||||
int t = (int)(v * float24::FromFloat32(static_cast<float>(texture.config.height)))
|
||||
.ToFloat32();
|
||||
|
||||
bool use_border_s = false;
|
||||
bool use_border_t = false;
|
||||
|
||||
if (texture.config.wrap_s == TexturingRegs::TextureConfig::ClampToBorder) {
|
||||
use_border_s = s < 0 || s >= static_cast<int>(texture.config.width);
|
||||
} else if (texture.config.wrap_s == TexturingRegs::TextureConfig::ClampToBorder2) {
|
||||
use_border_s = s >= static_cast<int>(texture.config.width);
|
||||
}
|
||||
|
||||
if (texture.config.wrap_t == TexturingRegs::TextureConfig::ClampToBorder) {
|
||||
use_border_t = t < 0 || t >= static_cast<int>(texture.config.height);
|
||||
} else if (texture.config.wrap_t == TexturingRegs::TextureConfig::ClampToBorder2) {
|
||||
use_border_t = t >= static_cast<int>(texture.config.height);
|
||||
}
|
||||
|
||||
if (use_border_s || use_border_t) {
|
||||
auto border_color = texture.config.border_color;
|
||||
texture_color[i] =
|
||||
Common::MakeVec(border_color.r.Value(), border_color.g.Value(),
|
||||
border_color.b.Value(), border_color.a.Value())
|
||||
.Cast<u8>();
|
||||
} else {
|
||||
// Textures are laid out from bottom to top, hence we invert the t coordinate.
|
||||
// NOTE: This may not be the right place for the inversion.
|
||||
// TODO: Check if this applies to ETC textures, too.
|
||||
s = GetWrappedTexCoord(texture.config.wrap_s, s, texture.config.width);
|
||||
t = texture.config.height - 1 -
|
||||
GetWrappedTexCoord(texture.config.wrap_t, t, texture.config.height);
|
||||
|
||||
const u8* texture_data =
|
||||
VideoCore::g_memory->GetPhysicalPointer(texture_address);
|
||||
auto info =
|
||||
Texture::TextureInfo::FromPicaRegister(texture.config, texture.format);
|
||||
|
||||
// TODO: Apply the min and mag filters to the texture
|
||||
texture_color[i] = Texture::LookupTexture(texture_data, s, t, info);
|
||||
}
|
||||
|
||||
if (i == 0 && (texture.config.type == TexturingRegs::TextureConfig::Shadow2D ||
|
||||
texture.config.type == TexturingRegs::TextureConfig::ShadowCube)) {
|
||||
|
||||
s32 z_int = static_cast<s32>(std::min(shadow_z.ToFloat32(), 1.0f) * 0xFFFFFF);
|
||||
z_int -= regs.texturing.shadow.bias << 1;
|
||||
auto& color = texture_color[i];
|
||||
s32 z_ref = (color.w << 16) | (color.z << 8) | color.y;
|
||||
u8 density;
|
||||
if (z_ref >= z_int) {
|
||||
density = color.x;
|
||||
} else {
|
||||
density = 0;
|
||||
}
|
||||
texture_color[i] = {density, density, density, density};
|
||||
}
|
||||
}
|
||||
|
||||
// sample procedural texture
|
||||
if (regs.texturing.main_config.texture3_enable) {
|
||||
const auto& proctex_uv = uv[regs.texturing.main_config.texture3_coordinates];
|
||||
texture_color[3] = ProcTex(proctex_uv.u().ToFloat32(), proctex_uv.v().ToFloat32(),
|
||||
g_state.regs.texturing, g_state.proctex);
|
||||
}
|
||||
|
||||
// Texture environment - consists of 6 stages of color and alpha combining.
|
||||
//
|
||||
// Color combiners take three input color values from some source (e.g. interpolated
|
||||
// vertex color, texture color, previous stage, etc), perform some very simple
|
||||
// operations on each of them (e.g. inversion) and then calculate the output color
|
||||
// with some basic arithmetic. Alpha combiners can be configured separately but work
|
||||
// analogously.
|
||||
Common::Vec4<u8> combiner_output;
|
||||
Common::Vec4<u8> combiner_buffer = {0, 0, 0, 0};
|
||||
Common::Vec4<u8> next_combiner_buffer =
|
||||
Common::MakeVec(regs.texturing.tev_combiner_buffer_color.r.Value(),
|
||||
regs.texturing.tev_combiner_buffer_color.g.Value(),
|
||||
regs.texturing.tev_combiner_buffer_color.b.Value(),
|
||||
regs.texturing.tev_combiner_buffer_color.a.Value())
|
||||
.Cast<u8>();
|
||||
|
||||
Common::Vec4<u8> primary_fragment_color = {0, 0, 0, 0};
|
||||
Common::Vec4<u8> secondary_fragment_color = {0, 0, 0, 0};
|
||||
|
||||
if (!g_state.regs.lighting.disable) {
|
||||
Common::Quaternion<float> normquat =
|
||||
Common::Quaternion<float>{
|
||||
{GetInterpolatedAttribute(v0.quat.x, v1.quat.x, v2.quat.x).ToFloat32(),
|
||||
GetInterpolatedAttribute(v0.quat.y, v1.quat.y, v2.quat.y).ToFloat32(),
|
||||
GetInterpolatedAttribute(v0.quat.z, v1.quat.z, v2.quat.z).ToFloat32()},
|
||||
GetInterpolatedAttribute(v0.quat.w, v1.quat.w, v2.quat.w).ToFloat32(),
|
||||
}
|
||||
.Normalized();
|
||||
|
||||
Common::Vec3<float> view{
|
||||
GetInterpolatedAttribute(v0.view.x, v1.view.x, v2.view.x).ToFloat32(),
|
||||
GetInterpolatedAttribute(v0.view.y, v1.view.y, v2.view.y).ToFloat32(),
|
||||
GetInterpolatedAttribute(v0.view.z, v1.view.z, v2.view.z).ToFloat32(),
|
||||
};
|
||||
std::tie(primary_fragment_color, secondary_fragment_color) = ComputeFragmentsColors(
|
||||
g_state.regs.lighting, g_state.lighting, normquat, view, texture_color);
|
||||
}
|
||||
|
||||
for (unsigned tev_stage_index = 0; tev_stage_index < tev_stages.size();
|
||||
++tev_stage_index) {
|
||||
const auto& tev_stage = tev_stages[tev_stage_index];
|
||||
using Source = TexturingRegs::TevStageConfig::Source;
|
||||
|
||||
auto GetSource = [&](Source source) -> Common::Vec4<u8> {
|
||||
switch (source) {
|
||||
case Source::PrimaryColor:
|
||||
return primary_color;
|
||||
|
||||
case Source::PrimaryFragmentColor:
|
||||
return primary_fragment_color;
|
||||
|
||||
case Source::SecondaryFragmentColor:
|
||||
return secondary_fragment_color;
|
||||
|
||||
case Source::Texture0:
|
||||
return texture_color[0];
|
||||
|
||||
case Source::Texture1:
|
||||
return texture_color[1];
|
||||
|
||||
case Source::Texture2:
|
||||
return texture_color[2];
|
||||
|
||||
case Source::Texture3:
|
||||
return texture_color[3];
|
||||
|
||||
case Source::PreviousBuffer:
|
||||
return combiner_buffer;
|
||||
|
||||
case Source::Constant:
|
||||
return Common::MakeVec(tev_stage.const_r.Value(), tev_stage.const_g.Value(),
|
||||
tev_stage.const_b.Value(), tev_stage.const_a.Value())
|
||||
.Cast<u8>();
|
||||
|
||||
case Source::Previous:
|
||||
return combiner_output;
|
||||
|
||||
default:
|
||||
LOG_ERROR(HW_GPU, "Unknown color combiner source {}", (int)source);
|
||||
UNIMPLEMENTED();
|
||||
return {0, 0, 0, 0};
|
||||
}
|
||||
};
|
||||
|
||||
// color combiner
|
||||
// NOTE: Not sure if the alpha combiner might use the color output of the previous
|
||||
// stage as input. Hence, we currently don't directly write the result to
|
||||
// combiner_output.rgb(), but instead store it in a temporary variable until
|
||||
// alpha combining has been done.
|
||||
Common::Vec3<u8> color_result[3] = {
|
||||
GetColorModifier(tev_stage.color_modifier1, GetSource(tev_stage.color_source1)),
|
||||
GetColorModifier(tev_stage.color_modifier2, GetSource(tev_stage.color_source2)),
|
||||
GetColorModifier(tev_stage.color_modifier3, GetSource(tev_stage.color_source3)),
|
||||
};
|
||||
auto color_output = ColorCombine(tev_stage.color_op, color_result);
|
||||
|
||||
u8 alpha_output;
|
||||
if (tev_stage.color_op == TexturingRegs::TevStageConfig::Operation::Dot3_RGBA) {
|
||||
// result of Dot3_RGBA operation is also placed to the alpha component
|
||||
alpha_output = color_output.x;
|
||||
} else {
|
||||
// alpha combiner
|
||||
std::array<u8, 3> alpha_result = {{
|
||||
GetAlphaModifier(tev_stage.alpha_modifier1,
|
||||
GetSource(tev_stage.alpha_source1)),
|
||||
GetAlphaModifier(tev_stage.alpha_modifier2,
|
||||
GetSource(tev_stage.alpha_source2)),
|
||||
GetAlphaModifier(tev_stage.alpha_modifier3,
|
||||
GetSource(tev_stage.alpha_source3)),
|
||||
}};
|
||||
alpha_output = AlphaCombine(tev_stage.alpha_op, alpha_result);
|
||||
}
|
||||
|
||||
combiner_output[0] =
|
||||
std::min((unsigned)255, color_output.r() * tev_stage.GetColorMultiplier());
|
||||
combiner_output[1] =
|
||||
std::min((unsigned)255, color_output.g() * tev_stage.GetColorMultiplier());
|
||||
combiner_output[2] =
|
||||
std::min((unsigned)255, color_output.b() * tev_stage.GetColorMultiplier());
|
||||
combiner_output[3] =
|
||||
std::min((unsigned)255, alpha_output * tev_stage.GetAlphaMultiplier());
|
||||
|
||||
combiner_buffer = next_combiner_buffer;
|
||||
|
||||
if (regs.texturing.tev_combiner_buffer_input.TevStageUpdatesCombinerBufferColor(
|
||||
tev_stage_index)) {
|
||||
next_combiner_buffer.r() = combiner_output.r();
|
||||
next_combiner_buffer.g() = combiner_output.g();
|
||||
next_combiner_buffer.b() = combiner_output.b();
|
||||
}
|
||||
|
||||
if (regs.texturing.tev_combiner_buffer_input.TevStageUpdatesCombinerBufferAlpha(
|
||||
tev_stage_index)) {
|
||||
next_combiner_buffer.a() = combiner_output.a();
|
||||
}
|
||||
}
|
||||
|
||||
const auto& output_merger = regs.framebuffer.output_merger;
|
||||
|
||||
if (output_merger.fragment_operation_mode ==
|
||||
FramebufferRegs::FragmentOperationMode::Shadow) {
|
||||
u32 depth_int = static_cast<u32>(depth * 0xFFFFFF);
|
||||
// use green color as the shadow intensity
|
||||
u8 stencil = combiner_output.y;
|
||||
DrawShadowMapPixel(x >> 4, y >> 4, depth_int, stencil);
|
||||
// skip the normal output merger pipeline if it is in shadow mode
|
||||
continue;
|
||||
}
|
||||
|
||||
// TODO: Does alpha testing happen before or after stencil?
|
||||
if (output_merger.alpha_test.enable) {
|
||||
bool pass = false;
|
||||
|
||||
switch (output_merger.alpha_test.func) {
|
||||
case FramebufferRegs::CompareFunc::Never:
|
||||
pass = false;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::Always:
|
||||
pass = true;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::Equal:
|
||||
pass = combiner_output.a() == output_merger.alpha_test.ref;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::NotEqual:
|
||||
pass = combiner_output.a() != output_merger.alpha_test.ref;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::LessThan:
|
||||
pass = combiner_output.a() < output_merger.alpha_test.ref;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::LessThanOrEqual:
|
||||
pass = combiner_output.a() <= output_merger.alpha_test.ref;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::GreaterThan:
|
||||
pass = combiner_output.a() > output_merger.alpha_test.ref;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::GreaterThanOrEqual:
|
||||
pass = combiner_output.a() >= output_merger.alpha_test.ref;
|
||||
break;
|
||||
}
|
||||
|
||||
if (!pass)
|
||||
continue;
|
||||
}
|
||||
|
||||
// Apply fog combiner
|
||||
// Not fully accurate. We'd have to know what data type is used to
|
||||
// store the depth etc. Using float for now until we know more
|
||||
// about Pica datatypes
|
||||
if (regs.texturing.fog_mode == TexturingRegs::FogMode::Fog) {
|
||||
const Common::Vec3<u8> fog_color =
|
||||
Common::MakeVec(regs.texturing.fog_color.r.Value(),
|
||||
regs.texturing.fog_color.g.Value(),
|
||||
regs.texturing.fog_color.b.Value())
|
||||
.Cast<u8>();
|
||||
|
||||
// Get index into fog LUT
|
||||
float fog_index;
|
||||
if (g_state.regs.texturing.fog_flip) {
|
||||
fog_index = (1.0f - depth) * 128.0f;
|
||||
} else {
|
||||
fog_index = depth * 128.0f;
|
||||
}
|
||||
|
||||
// Generate clamped fog factor from LUT for given fog index
|
||||
float fog_i = std::clamp(floorf(fog_index), 0.0f, 127.0f);
|
||||
float fog_f = fog_index - fog_i;
|
||||
const auto& fog_lut_entry = g_state.fog.lut[static_cast<unsigned int>(fog_i)];
|
||||
float fog_factor = fog_lut_entry.ToFloat() + fog_lut_entry.DiffToFloat() * fog_f;
|
||||
fog_factor = std::clamp(fog_factor, 0.0f, 1.0f);
|
||||
|
||||
// Blend the fog
|
||||
for (unsigned i = 0; i < 3; i++) {
|
||||
combiner_output[i] = static_cast<u8>(fog_factor * combiner_output[i] +
|
||||
(1.0f - fog_factor) * fog_color[i]);
|
||||
}
|
||||
}
|
||||
|
||||
u8 old_stencil = 0;
|
||||
|
||||
auto UpdateStencil = [stencil_test, x, y,
|
||||
&old_stencil](Pica::FramebufferRegs::StencilAction action) {
|
||||
u8 new_stencil =
|
||||
PerformStencilAction(action, old_stencil, stencil_test.reference_value);
|
||||
if (g_state.regs.framebuffer.framebuffer.allow_depth_stencil_write != 0)
|
||||
SetStencil(x >> 4, y >> 4,
|
||||
(new_stencil & stencil_test.write_mask) |
|
||||
(old_stencil & ~stencil_test.write_mask));
|
||||
};
|
||||
|
||||
if (stencil_action_enable) {
|
||||
old_stencil = GetStencil(x >> 4, y >> 4);
|
||||
u8 dest = old_stencil & stencil_test.input_mask;
|
||||
u8 ref = stencil_test.reference_value & stencil_test.input_mask;
|
||||
|
||||
bool pass = false;
|
||||
switch (stencil_test.func) {
|
||||
case FramebufferRegs::CompareFunc::Never:
|
||||
pass = false;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::Always:
|
||||
pass = true;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::Equal:
|
||||
pass = (ref == dest);
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::NotEqual:
|
||||
pass = (ref != dest);
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::LessThan:
|
||||
pass = (ref < dest);
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::LessThanOrEqual:
|
||||
pass = (ref <= dest);
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::GreaterThan:
|
||||
pass = (ref > dest);
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::GreaterThanOrEqual:
|
||||
pass = (ref >= dest);
|
||||
break;
|
||||
}
|
||||
|
||||
if (!pass) {
|
||||
UpdateStencil(stencil_test.action_stencil_fail);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
||||
// Convert float to integer
|
||||
unsigned num_bits =
|
||||
FramebufferRegs::DepthBitsPerPixel(regs.framebuffer.framebuffer.depth_format);
|
||||
u32 z = (u32)(depth * ((1 << num_bits) - 1));
|
||||
|
||||
if (output_merger.depth_test_enable) {
|
||||
u32 ref_z = GetDepth(x >> 4, y >> 4);
|
||||
|
||||
bool pass = false;
|
||||
|
||||
switch (output_merger.depth_test_func) {
|
||||
case FramebufferRegs::CompareFunc::Never:
|
||||
pass = false;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::Always:
|
||||
pass = true;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::Equal:
|
||||
pass = z == ref_z;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::NotEqual:
|
||||
pass = z != ref_z;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::LessThan:
|
||||
pass = z < ref_z;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::LessThanOrEqual:
|
||||
pass = z <= ref_z;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::GreaterThan:
|
||||
pass = z > ref_z;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::CompareFunc::GreaterThanOrEqual:
|
||||
pass = z >= ref_z;
|
||||
break;
|
||||
}
|
||||
|
||||
if (!pass) {
|
||||
if (stencil_action_enable)
|
||||
UpdateStencil(stencil_test.action_depth_fail);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
||||
if (regs.framebuffer.framebuffer.allow_depth_stencil_write != 0 &&
|
||||
output_merger.depth_write_enable) {
|
||||
|
||||
SetDepth(x >> 4, y >> 4, z);
|
||||
}
|
||||
|
||||
// The stencil depth_pass action is executed even if depth testing is disabled
|
||||
if (stencil_action_enable)
|
||||
UpdateStencil(stencil_test.action_depth_pass);
|
||||
|
||||
auto dest = GetPixel(x >> 4, y >> 4);
|
||||
Common::Vec4<u8> blend_output = combiner_output;
|
||||
|
||||
if (output_merger.alphablend_enable) {
|
||||
auto params = output_merger.alpha_blending;
|
||||
|
||||
auto LookupFactor = [&](unsigned channel,
|
||||
FramebufferRegs::BlendFactor factor) -> u8 {
|
||||
DEBUG_ASSERT(channel < 4);
|
||||
|
||||
const Common::Vec4<u8> blend_const =
|
||||
Common::MakeVec(output_merger.blend_const.r.Value(),
|
||||
output_merger.blend_const.g.Value(),
|
||||
output_merger.blend_const.b.Value(),
|
||||
output_merger.blend_const.a.Value())
|
||||
.Cast<u8>();
|
||||
|
||||
switch (factor) {
|
||||
case FramebufferRegs::BlendFactor::Zero:
|
||||
return 0;
|
||||
|
||||
case FramebufferRegs::BlendFactor::One:
|
||||
return 255;
|
||||
|
||||
case FramebufferRegs::BlendFactor::SourceColor:
|
||||
return combiner_output[channel];
|
||||
|
||||
case FramebufferRegs::BlendFactor::OneMinusSourceColor:
|
||||
return 255 - combiner_output[channel];
|
||||
|
||||
case FramebufferRegs::BlendFactor::DestColor:
|
||||
return dest[channel];
|
||||
|
||||
case FramebufferRegs::BlendFactor::OneMinusDestColor:
|
||||
return 255 - dest[channel];
|
||||
|
||||
case FramebufferRegs::BlendFactor::SourceAlpha:
|
||||
return combiner_output.a();
|
||||
|
||||
case FramebufferRegs::BlendFactor::OneMinusSourceAlpha:
|
||||
return 255 - combiner_output.a();
|
||||
|
||||
case FramebufferRegs::BlendFactor::DestAlpha:
|
||||
return dest.a();
|
||||
|
||||
case FramebufferRegs::BlendFactor::OneMinusDestAlpha:
|
||||
return 255 - dest.a();
|
||||
|
||||
case FramebufferRegs::BlendFactor::ConstantColor:
|
||||
return blend_const[channel];
|
||||
|
||||
case FramebufferRegs::BlendFactor::OneMinusConstantColor:
|
||||
return 255 - blend_const[channel];
|
||||
|
||||
case FramebufferRegs::BlendFactor::ConstantAlpha:
|
||||
return blend_const.a();
|
||||
|
||||
case FramebufferRegs::BlendFactor::OneMinusConstantAlpha:
|
||||
return 255 - blend_const.a();
|
||||
|
||||
case FramebufferRegs::BlendFactor::SourceAlphaSaturate:
|
||||
// Returns 1.0 for the alpha channel
|
||||
if (channel == 3)
|
||||
return 255;
|
||||
return std::min(combiner_output.a(), static_cast<u8>(255 - dest.a()));
|
||||
|
||||
default:
|
||||
LOG_CRITICAL(HW_GPU, "Unknown blend factor {:x}", factor);
|
||||
UNIMPLEMENTED();
|
||||
break;
|
||||
}
|
||||
|
||||
return combiner_output[channel];
|
||||
};
|
||||
|
||||
auto srcfactor = Common::MakeVec(LookupFactor(0, params.factor_source_rgb),
|
||||
LookupFactor(1, params.factor_source_rgb),
|
||||
LookupFactor(2, params.factor_source_rgb),
|
||||
LookupFactor(3, params.factor_source_a));
|
||||
|
||||
auto dstfactor = Common::MakeVec(LookupFactor(0, params.factor_dest_rgb),
|
||||
LookupFactor(1, params.factor_dest_rgb),
|
||||
LookupFactor(2, params.factor_dest_rgb),
|
||||
LookupFactor(3, params.factor_dest_a));
|
||||
|
||||
blend_output = EvaluateBlendEquation(combiner_output, srcfactor, dest, dstfactor,
|
||||
params.blend_equation_rgb);
|
||||
blend_output.a() = EvaluateBlendEquation(combiner_output, srcfactor, dest,
|
||||
dstfactor, params.blend_equation_a)
|
||||
.a();
|
||||
} else {
|
||||
blend_output =
|
||||
Common::MakeVec(LogicOp(combiner_output.r(), dest.r(), output_merger.logic_op),
|
||||
LogicOp(combiner_output.g(), dest.g(), output_merger.logic_op),
|
||||
LogicOp(combiner_output.b(), dest.b(), output_merger.logic_op),
|
||||
LogicOp(combiner_output.a(), dest.a(), output_merger.logic_op));
|
||||
}
|
||||
|
||||
const Common::Vec4<u8> result = {
|
||||
output_merger.red_enable ? blend_output.r() : dest.r(),
|
||||
output_merger.green_enable ? blend_output.g() : dest.g(),
|
||||
output_merger.blue_enable ? blend_output.b() : dest.b(),
|
||||
output_merger.alpha_enable ? blend_output.a() : dest.a(),
|
||||
};
|
||||
|
||||
if (regs.framebuffer.framebuffer.allow_color_write != 0)
|
||||
DrawPixel(x >> 4, y >> 4, result);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void ProcessTriangle(const Vertex& v0, const Vertex& v1, const Vertex& v2) {
|
||||
ProcessTriangleInternal(v0, v1, v2);
|
||||
}
|
||||
|
||||
} // namespace Pica::Rasterizer
|
||||
44
src/video_core/renderer_software/rasterizer.h
Normal file
44
src/video_core/renderer_software/rasterizer.h
Normal file
@@ -0,0 +1,44 @@
|
||||
// Copyright 2014 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "video_core/shader/shader.h"
|
||||
|
||||
namespace Pica::Rasterizer {
|
||||
|
||||
struct Vertex : Shader::OutputVertex {
|
||||
Vertex(const OutputVertex& v) : OutputVertex(v) {}
|
||||
|
||||
// Attributes used to store intermediate results
|
||||
// position after perspective divide
|
||||
Common::Vec3<float24> screenpos;
|
||||
|
||||
// Linear interpolation
|
||||
// factor: 0=this, 1=vtx
|
||||
// Note: This function cannot be called after perspective divide
|
||||
void Lerp(float24 factor, const Vertex& vtx) {
|
||||
pos = pos * factor + vtx.pos * (float24::FromFloat32(1) - factor);
|
||||
quat = quat * factor + vtx.quat * (float24::FromFloat32(1) - factor);
|
||||
color = color * factor + vtx.color * (float24::FromFloat32(1) - factor);
|
||||
tc0 = tc0 * factor + vtx.tc0 * (float24::FromFloat32(1) - factor);
|
||||
tc1 = tc1 * factor + vtx.tc1 * (float24::FromFloat32(1) - factor);
|
||||
tc0_w = tc0_w * factor + vtx.tc0_w * (float24::FromFloat32(1) - factor);
|
||||
view = view * factor + vtx.view * (float24::FromFloat32(1) - factor);
|
||||
tc2 = tc2 * factor + vtx.tc2 * (float24::FromFloat32(1) - factor);
|
||||
}
|
||||
|
||||
// Linear interpolation
|
||||
// factor: 0=v0, 1=v1
|
||||
// Note: This function cannot be called after perspective divide
|
||||
static Vertex Lerp(float24 factor, const Vertex& v0, const Vertex& v1) {
|
||||
Vertex ret = v0;
|
||||
ret.Lerp(factor, v1);
|
||||
return ret;
|
||||
}
|
||||
};
|
||||
|
||||
void ProcessTriangle(const Vertex& v0, const Vertex& v1, const Vertex& v2);
|
||||
|
||||
} // namespace Pica::Rasterizer
|
||||
19
src/video_core/renderer_software/renderer_software.cpp
Normal file
19
src/video_core/renderer_software/renderer_software.cpp
Normal file
@@ -0,0 +1,19 @@
|
||||
// Copyright 2023 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include "video_core/renderer_software/renderer_software.h"
|
||||
|
||||
namespace VideoCore {
|
||||
|
||||
RendererSoftware::RendererSoftware(Core::System& system, Frontend::EmuWindow& window)
|
||||
: VideoCore::RendererBase{system, window, nullptr},
|
||||
rasterizer{std::make_unique<RasterizerSoftware>()} {}
|
||||
|
||||
RendererSoftware::~RendererSoftware() = default;
|
||||
|
||||
void RendererSoftware::SwapBuffers() {
|
||||
EndFrame();
|
||||
}
|
||||
|
||||
} // namespace VideoCore
|
||||
33
src/video_core/renderer_software/renderer_software.h
Normal file
33
src/video_core/renderer_software/renderer_software.h
Normal file
@@ -0,0 +1,33 @@
|
||||
// Copyright 2023 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "video_core/renderer_base.h"
|
||||
#include "video_core/renderer_software/sw_rasterizer.h"
|
||||
|
||||
namespace Core {
|
||||
class System;
|
||||
}
|
||||
|
||||
namespace VideoCore {
|
||||
|
||||
class RendererSoftware : public VideoCore::RendererBase {
|
||||
public:
|
||||
explicit RendererSoftware(Core::System& system, Frontend::EmuWindow& window);
|
||||
~RendererSoftware() override;
|
||||
|
||||
[[nodiscard]] VideoCore::RasterizerInterface* Rasterizer() const override {
|
||||
return rasterizer.get();
|
||||
}
|
||||
|
||||
void SwapBuffers() override;
|
||||
void TryPresent(int timeout_ms, bool is_secondary) override {}
|
||||
void Sync() override {}
|
||||
|
||||
private:
|
||||
std::unique_ptr<RasterizerSoftware> rasterizer;
|
||||
};
|
||||
|
||||
} // namespace VideoCore
|
||||
196
src/video_core/renderer_software/sw_clipper.cpp
Normal file
196
src/video_core/renderer_software/sw_clipper.cpp
Normal file
@@ -0,0 +1,196 @@
|
||||
// Copyright 2014 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include <algorithm>
|
||||
#include <array>
|
||||
#include <cstddef>
|
||||
#include <boost/container/static_vector.hpp>
|
||||
#include "common/bit_field.h"
|
||||
#include "common/common_types.h"
|
||||
#include "common/logging/log.h"
|
||||
#include "common/vector_math.h"
|
||||
#include "video_core/pica_state.h"
|
||||
#include "video_core/pica_types.h"
|
||||
#include "video_core/renderer_software/rasterizer.h"
|
||||
#include "video_core/renderer_software/sw_clipper.h"
|
||||
#include "video_core/shader/shader.h"
|
||||
|
||||
using Pica::Rasterizer::Vertex;
|
||||
|
||||
namespace Pica::Clipper {
|
||||
|
||||
struct ClippingEdge {
|
||||
public:
|
||||
ClippingEdge(Common::Vec4<float24> coeffs,
|
||||
Common::Vec4<float24> bias = Common::Vec4<float24>(float24::FromFloat32(0),
|
||||
float24::FromFloat32(0),
|
||||
float24::FromFloat32(0),
|
||||
float24::FromFloat32(0)))
|
||||
: coeffs(coeffs), bias(bias) {}
|
||||
|
||||
bool IsInside(const Vertex& vertex) const {
|
||||
return Common::Dot(vertex.pos + bias, coeffs) >= float24::FromFloat32(0);
|
||||
}
|
||||
|
||||
bool IsOutSide(const Vertex& vertex) const {
|
||||
return !IsInside(vertex);
|
||||
}
|
||||
|
||||
Vertex GetIntersection(const Vertex& v0, const Vertex& v1) const {
|
||||
float24 dp = Common::Dot(v0.pos + bias, coeffs);
|
||||
float24 dp_prev = Common::Dot(v1.pos + bias, coeffs);
|
||||
float24 factor = dp_prev / (dp_prev - dp);
|
||||
|
||||
return Vertex::Lerp(factor, v0, v1);
|
||||
}
|
||||
|
||||
private:
|
||||
[[maybe_unused]] float24 pos;
|
||||
Common::Vec4<float24> coeffs;
|
||||
Common::Vec4<float24> bias;
|
||||
};
|
||||
|
||||
static void InitScreenCoordinates(Vertex& vtx) {
|
||||
struct {
|
||||
float24 halfsize_x;
|
||||
float24 offset_x;
|
||||
float24 halfsize_y;
|
||||
float24 offset_y;
|
||||
float24 zscale;
|
||||
float24 offset_z;
|
||||
} viewport;
|
||||
|
||||
const auto& regs = g_state.regs;
|
||||
viewport.halfsize_x = float24::FromRaw(regs.rasterizer.viewport_size_x);
|
||||
viewport.halfsize_y = float24::FromRaw(regs.rasterizer.viewport_size_y);
|
||||
viewport.offset_x = float24::FromFloat32(static_cast<float>(regs.rasterizer.viewport_corner.x));
|
||||
viewport.offset_y = float24::FromFloat32(static_cast<float>(regs.rasterizer.viewport_corner.y));
|
||||
|
||||
float24 inv_w = float24::FromFloat32(1.f) / vtx.pos.w;
|
||||
vtx.pos.w = inv_w;
|
||||
vtx.quat *= inv_w;
|
||||
vtx.color *= inv_w;
|
||||
vtx.tc0 *= inv_w;
|
||||
vtx.tc1 *= inv_w;
|
||||
vtx.tc0_w *= inv_w;
|
||||
vtx.view *= inv_w;
|
||||
vtx.tc2 *= inv_w;
|
||||
|
||||
vtx.screenpos[0] =
|
||||
(vtx.pos.x * inv_w + float24::FromFloat32(1.0)) * viewport.halfsize_x + viewport.offset_x;
|
||||
vtx.screenpos[1] =
|
||||
(vtx.pos.y * inv_w + float24::FromFloat32(1.0)) * viewport.halfsize_y + viewport.offset_y;
|
||||
vtx.screenpos[2] = vtx.pos.z * inv_w;
|
||||
}
|
||||
|
||||
void ProcessTriangle(const OutputVertex& v0, const OutputVertex& v1, const OutputVertex& v2) {
|
||||
using boost::container::static_vector;
|
||||
|
||||
// Clipping a planar n-gon against a plane will remove at least 1 vertex and introduces 2 at
|
||||
// the new edge (or less in degenerate cases). As such, we can say that each clipping plane
|
||||
// introduces at most 1 new vertex to the polygon. Since we start with a triangle and have a
|
||||
// fixed 6 clipping planes, the maximum number of vertices of the clipped polygon is 3 + 6 = 9.
|
||||
static const std::size_t MAX_VERTICES = 9;
|
||||
static_vector<Vertex, MAX_VERTICES> buffer_a = {v0, v1, v2};
|
||||
static_vector<Vertex, MAX_VERTICES> buffer_b;
|
||||
|
||||
auto FlipQuaternionIfOpposite = [](auto& a, const auto& b) {
|
||||
if (Common::Dot(a, b) < float24::Zero())
|
||||
a = a * float24::FromFloat32(-1.0f);
|
||||
};
|
||||
|
||||
// Flip the quaternions if they are opposite to prevent interpolating them over the wrong
|
||||
// direction.
|
||||
FlipQuaternionIfOpposite(buffer_a[1].quat, buffer_a[0].quat);
|
||||
FlipQuaternionIfOpposite(buffer_a[2].quat, buffer_a[0].quat);
|
||||
|
||||
auto* output_list = &buffer_a;
|
||||
auto* input_list = &buffer_b;
|
||||
|
||||
// NOTE: We clip against a w=epsilon plane to guarantee that the output has a positive w value.
|
||||
// TODO: Not sure if this is a valid approach. Also should probably instead use the smallest
|
||||
// epsilon possible within float24 accuracy.
|
||||
static const float24 EPSILON = float24::FromFloat32(0.00001f);
|
||||
static const float24 f0 = float24::FromFloat32(0.0);
|
||||
static const float24 f1 = float24::FromFloat32(1.0);
|
||||
static const std::array<ClippingEdge, 7> clipping_edges = {{
|
||||
{Common::MakeVec(-f1, f0, f0, f1)}, // x = +w
|
||||
{Common::MakeVec(f1, f0, f0, f1)}, // x = -w
|
||||
{Common::MakeVec(f0, -f1, f0, f1)}, // y = +w
|
||||
{Common::MakeVec(f0, f1, f0, f1)}, // y = -w
|
||||
{Common::MakeVec(f0, f0, -f1, f0)}, // z = 0
|
||||
{Common::MakeVec(f0, f0, f1, f1)}, // z = -w
|
||||
{Common::MakeVec(f0, f0, f0, f1),
|
||||
Common::Vec4<float24>(f0, f0, f0, EPSILON)}, // w = EPSILON
|
||||
}};
|
||||
|
||||
// Simple implementation of the Sutherland-Hodgman clipping algorithm.
|
||||
// TODO: Make this less inefficient (currently lots of useless buffering overhead happens here)
|
||||
auto Clip = [&](const ClippingEdge& edge) {
|
||||
std::swap(input_list, output_list);
|
||||
output_list->clear();
|
||||
|
||||
const Vertex* reference_vertex = &input_list->back();
|
||||
|
||||
for (const auto& vertex : *input_list) {
|
||||
// NOTE: This algorithm changes vertex order in some cases!
|
||||
if (edge.IsInside(vertex)) {
|
||||
if (edge.IsOutSide(*reference_vertex)) {
|
||||
output_list->push_back(edge.GetIntersection(vertex, *reference_vertex));
|
||||
}
|
||||
|
||||
output_list->push_back(vertex);
|
||||
} else if (edge.IsInside(*reference_vertex)) {
|
||||
output_list->push_back(edge.GetIntersection(vertex, *reference_vertex));
|
||||
}
|
||||
reference_vertex = &vertex;
|
||||
}
|
||||
};
|
||||
|
||||
for (auto edge : clipping_edges) {
|
||||
Clip(edge);
|
||||
|
||||
// Need to have at least a full triangle to continue...
|
||||
if (output_list->size() < 3)
|
||||
return;
|
||||
}
|
||||
|
||||
if (g_state.regs.rasterizer.clip_enable) {
|
||||
ClippingEdge custom_edge{g_state.regs.rasterizer.GetClipCoef()};
|
||||
Clip(custom_edge);
|
||||
|
||||
if (output_list->size() < 3)
|
||||
return;
|
||||
}
|
||||
|
||||
InitScreenCoordinates((*output_list)[0]);
|
||||
InitScreenCoordinates((*output_list)[1]);
|
||||
|
||||
for (std::size_t i = 0; i < output_list->size() - 2; i++) {
|
||||
Vertex& vtx0 = (*output_list)[0];
|
||||
Vertex& vtx1 = (*output_list)[i + 1];
|
||||
Vertex& vtx2 = (*output_list)[i + 2];
|
||||
|
||||
InitScreenCoordinates(vtx2);
|
||||
|
||||
LOG_TRACE(
|
||||
Render_Software,
|
||||
"Triangle {}/{} at position ({:.3}, {:.3}, {:.3}, {:.3f}), "
|
||||
"({:.3}, {:.3}, {:.3}, {:.3}), ({:.3}, {:.3}, {:.3}, {:.3}) and "
|
||||
"screen position ({:.2}, {:.2}, {:.2}), ({:.2}, {:.2}, {:.2}), ({:.2}, {:.2}, {:.2})",
|
||||
i + 1, output_list->size() - 2, vtx0.pos.x.ToFloat32(), vtx0.pos.y.ToFloat32(),
|
||||
vtx0.pos.z.ToFloat32(), vtx0.pos.w.ToFloat32(), vtx1.pos.x.ToFloat32(),
|
||||
vtx1.pos.y.ToFloat32(), vtx1.pos.z.ToFloat32(), vtx1.pos.w.ToFloat32(),
|
||||
vtx2.pos.x.ToFloat32(), vtx2.pos.y.ToFloat32(), vtx2.pos.z.ToFloat32(),
|
||||
vtx2.pos.w.ToFloat32(), vtx0.screenpos.x.ToFloat32(), vtx0.screenpos.y.ToFloat32(),
|
||||
vtx0.screenpos.z.ToFloat32(), vtx1.screenpos.x.ToFloat32(),
|
||||
vtx1.screenpos.y.ToFloat32(), vtx1.screenpos.z.ToFloat32(),
|
||||
vtx2.screenpos.x.ToFloat32(), vtx2.screenpos.y.ToFloat32(),
|
||||
vtx2.screenpos.z.ToFloat32());
|
||||
|
||||
Rasterizer::ProcessTriangle(vtx0, vtx1, vtx2);
|
||||
}
|
||||
}
|
||||
|
||||
} // namespace Pica::Clipper
|
||||
19
src/video_core/renderer_software/sw_clipper.h
Normal file
19
src/video_core/renderer_software/sw_clipper.h
Normal file
@@ -0,0 +1,19 @@
|
||||
// Copyright 2014 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
namespace Pica {
|
||||
namespace Shader {
|
||||
struct OutputVertex;
|
||||
}
|
||||
|
||||
namespace Clipper {
|
||||
|
||||
using Shader::OutputVertex;
|
||||
|
||||
void ProcessTriangle(const OutputVertex& v0, const OutputVertex& v1, const OutputVertex& v2);
|
||||
|
||||
} // namespace Clipper
|
||||
} // namespace Pica
|
||||
411
src/video_core/renderer_software/sw_framebuffer.cpp
Normal file
411
src/video_core/renderer_software/sw_framebuffer.cpp
Normal file
@@ -0,0 +1,411 @@
|
||||
// Copyright 2017 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include <algorithm>
|
||||
#include "common/assert.h"
|
||||
#include "common/color.h"
|
||||
#include "common/common_types.h"
|
||||
#include "common/logging/log.h"
|
||||
#include "common/vector_math.h"
|
||||
#include "core/hw/gpu.h"
|
||||
#include "core/memory.h"
|
||||
#include "video_core/pica_state.h"
|
||||
#include "video_core/regs_framebuffer.h"
|
||||
#include "video_core/renderer_software/sw_framebuffer.h"
|
||||
#include "video_core/utils.h"
|
||||
#include "video_core/video_core.h"
|
||||
|
||||
namespace Pica::Rasterizer {
|
||||
|
||||
void DrawPixel(int x, int y, const Common::Vec4<u8>& color) {
|
||||
const auto& framebuffer = g_state.regs.framebuffer.framebuffer;
|
||||
const PAddr addr = framebuffer.GetColorBufferPhysicalAddress();
|
||||
|
||||
// Similarly to textures, the render framebuffer is laid out from bottom to top, too.
|
||||
// NOTE: The framebuffer height register contains the actual FB height minus one.
|
||||
y = framebuffer.height - y;
|
||||
|
||||
const u32 coarse_y = y & ~7;
|
||||
u32 bytes_per_pixel =
|
||||
GPU::Regs::BytesPerPixel(GPU::Regs::PixelFormat(framebuffer.color_format.Value()));
|
||||
u32 dst_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) +
|
||||
coarse_y * framebuffer.width * bytes_per_pixel;
|
||||
u8* dst_pixel = VideoCore::g_memory->GetPhysicalPointer(addr) + dst_offset;
|
||||
|
||||
switch (framebuffer.color_format) {
|
||||
case FramebufferRegs::ColorFormat::RGBA8:
|
||||
Common::Color::EncodeRGBA8(color, dst_pixel);
|
||||
break;
|
||||
|
||||
case FramebufferRegs::ColorFormat::RGB8:
|
||||
Common::Color::EncodeRGB8(color, dst_pixel);
|
||||
break;
|
||||
|
||||
case FramebufferRegs::ColorFormat::RGB5A1:
|
||||
Common::Color::EncodeRGB5A1(color, dst_pixel);
|
||||
break;
|
||||
|
||||
case FramebufferRegs::ColorFormat::RGB565:
|
||||
Common::Color::EncodeRGB565(color, dst_pixel);
|
||||
break;
|
||||
|
||||
case FramebufferRegs::ColorFormat::RGBA4:
|
||||
Common::Color::EncodeRGBA4(color, dst_pixel);
|
||||
break;
|
||||
|
||||
default:
|
||||
LOG_CRITICAL(Render_Software, "Unknown framebuffer color format {:x}",
|
||||
static_cast<u32>(framebuffer.color_format.Value()));
|
||||
UNIMPLEMENTED();
|
||||
}
|
||||
}
|
||||
|
||||
const Common::Vec4<u8> GetPixel(int x, int y) {
|
||||
const auto& framebuffer = g_state.regs.framebuffer.framebuffer;
|
||||
const PAddr addr = framebuffer.GetColorBufferPhysicalAddress();
|
||||
|
||||
y = framebuffer.height - y;
|
||||
|
||||
const u32 coarse_y = y & ~7;
|
||||
u32 bytes_per_pixel =
|
||||
GPU::Regs::BytesPerPixel(GPU::Regs::PixelFormat(framebuffer.color_format.Value()));
|
||||
u32 src_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) +
|
||||
coarse_y * framebuffer.width * bytes_per_pixel;
|
||||
u8* src_pixel = VideoCore::g_memory->GetPhysicalPointer(addr) + src_offset;
|
||||
|
||||
switch (framebuffer.color_format) {
|
||||
case FramebufferRegs::ColorFormat::RGBA8:
|
||||
return Common::Color::DecodeRGBA8(src_pixel);
|
||||
|
||||
case FramebufferRegs::ColorFormat::RGB8:
|
||||
return Common::Color::DecodeRGB8(src_pixel);
|
||||
|
||||
case FramebufferRegs::ColorFormat::RGB5A1:
|
||||
return Common::Color::DecodeRGB5A1(src_pixel);
|
||||
|
||||
case FramebufferRegs::ColorFormat::RGB565:
|
||||
return Common::Color::DecodeRGB565(src_pixel);
|
||||
|
||||
case FramebufferRegs::ColorFormat::RGBA4:
|
||||
return Common::Color::DecodeRGBA4(src_pixel);
|
||||
|
||||
default:
|
||||
LOG_CRITICAL(Render_Software, "Unknown framebuffer color format {:x}",
|
||||
static_cast<u32>(framebuffer.color_format.Value()));
|
||||
UNIMPLEMENTED();
|
||||
}
|
||||
|
||||
return {0, 0, 0, 0};
|
||||
}
|
||||
|
||||
u32 GetDepth(int x, int y) {
|
||||
const auto& framebuffer = g_state.regs.framebuffer.framebuffer;
|
||||
const PAddr addr = framebuffer.GetDepthBufferPhysicalAddress();
|
||||
u8* depth_buffer = VideoCore::g_memory->GetPhysicalPointer(addr);
|
||||
|
||||
y = framebuffer.height - y;
|
||||
|
||||
const u32 coarse_y = y & ~7;
|
||||
u32 bytes_per_pixel = FramebufferRegs::BytesPerDepthPixel(framebuffer.depth_format);
|
||||
u32 stride = framebuffer.width * bytes_per_pixel;
|
||||
|
||||
u32 src_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * stride;
|
||||
u8* src_pixel = depth_buffer + src_offset;
|
||||
|
||||
switch (framebuffer.depth_format) {
|
||||
case FramebufferRegs::DepthFormat::D16:
|
||||
return Common::Color::DecodeD16(src_pixel);
|
||||
case FramebufferRegs::DepthFormat::D24:
|
||||
return Common::Color::DecodeD24(src_pixel);
|
||||
case FramebufferRegs::DepthFormat::D24S8:
|
||||
return Common::Color::DecodeD24S8(src_pixel).x;
|
||||
default:
|
||||
LOG_CRITICAL(HW_GPU, "Unimplemented depth format {}",
|
||||
static_cast<u32>(framebuffer.depth_format.Value()));
|
||||
UNIMPLEMENTED();
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
u8 GetStencil(int x, int y) {
|
||||
const auto& framebuffer = g_state.regs.framebuffer.framebuffer;
|
||||
const PAddr addr = framebuffer.GetDepthBufferPhysicalAddress();
|
||||
u8* depth_buffer = VideoCore::g_memory->GetPhysicalPointer(addr);
|
||||
|
||||
y = framebuffer.height - y;
|
||||
|
||||
const u32 coarse_y = y & ~7;
|
||||
u32 bytes_per_pixel = Pica::FramebufferRegs::BytesPerDepthPixel(framebuffer.depth_format);
|
||||
u32 stride = framebuffer.width * bytes_per_pixel;
|
||||
|
||||
u32 src_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * stride;
|
||||
u8* src_pixel = depth_buffer + src_offset;
|
||||
|
||||
switch (framebuffer.depth_format) {
|
||||
case FramebufferRegs::DepthFormat::D24S8:
|
||||
return Common::Color::DecodeD24S8(src_pixel).y;
|
||||
|
||||
default:
|
||||
LOG_WARNING(
|
||||
HW_GPU,
|
||||
"GetStencil called for function which doesn't have a stencil component (format {})",
|
||||
static_cast<u32>(framebuffer.depth_format.Value()));
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
void SetDepth(int x, int y, u32 value) {
|
||||
const auto& framebuffer = g_state.regs.framebuffer.framebuffer;
|
||||
const PAddr addr = framebuffer.GetDepthBufferPhysicalAddress();
|
||||
u8* depth_buffer = VideoCore::g_memory->GetPhysicalPointer(addr);
|
||||
|
||||
y = framebuffer.height - y;
|
||||
|
||||
const u32 coarse_y = y & ~7;
|
||||
u32 bytes_per_pixel = FramebufferRegs::BytesPerDepthPixel(framebuffer.depth_format);
|
||||
u32 stride = framebuffer.width * bytes_per_pixel;
|
||||
|
||||
u32 dst_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * stride;
|
||||
u8* dst_pixel = depth_buffer + dst_offset;
|
||||
|
||||
switch (framebuffer.depth_format) {
|
||||
case FramebufferRegs::DepthFormat::D16:
|
||||
Common::Color::EncodeD16(value, dst_pixel);
|
||||
break;
|
||||
|
||||
case FramebufferRegs::DepthFormat::D24:
|
||||
Common::Color::EncodeD24(value, dst_pixel);
|
||||
break;
|
||||
|
||||
case FramebufferRegs::DepthFormat::D24S8:
|
||||
Common::Color::EncodeD24X8(value, dst_pixel);
|
||||
break;
|
||||
|
||||
default:
|
||||
LOG_CRITICAL(HW_GPU, "Unimplemented depth format {}",
|
||||
static_cast<u32>(framebuffer.depth_format.Value()));
|
||||
UNIMPLEMENTED();
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
void SetStencil(int x, int y, u8 value) {
|
||||
const auto& framebuffer = g_state.regs.framebuffer.framebuffer;
|
||||
const PAddr addr = framebuffer.GetDepthBufferPhysicalAddress();
|
||||
u8* depth_buffer = VideoCore::g_memory->GetPhysicalPointer(addr);
|
||||
|
||||
y = framebuffer.height - y;
|
||||
|
||||
const u32 coarse_y = y & ~7;
|
||||
u32 bytes_per_pixel = Pica::FramebufferRegs::BytesPerDepthPixel(framebuffer.depth_format);
|
||||
u32 stride = framebuffer.width * bytes_per_pixel;
|
||||
|
||||
u32 dst_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * stride;
|
||||
u8* dst_pixel = depth_buffer + dst_offset;
|
||||
|
||||
switch (framebuffer.depth_format) {
|
||||
case Pica::FramebufferRegs::DepthFormat::D16:
|
||||
case Pica::FramebufferRegs::DepthFormat::D24:
|
||||
// Nothing to do
|
||||
break;
|
||||
|
||||
case Pica::FramebufferRegs::DepthFormat::D24S8:
|
||||
Common::Color::EncodeX24S8(value, dst_pixel);
|
||||
break;
|
||||
|
||||
default:
|
||||
LOG_CRITICAL(HW_GPU, "Unimplemented depth format {}",
|
||||
static_cast<u32>(framebuffer.depth_format.Value()));
|
||||
UNIMPLEMENTED();
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
u8 PerformStencilAction(FramebufferRegs::StencilAction action, u8 old_stencil, u8 ref) {
|
||||
switch (action) {
|
||||
case FramebufferRegs::StencilAction::Keep:
|
||||
return old_stencil;
|
||||
|
||||
case FramebufferRegs::StencilAction::Zero:
|
||||
return 0;
|
||||
|
||||
case FramebufferRegs::StencilAction::Replace:
|
||||
return ref;
|
||||
|
||||
case FramebufferRegs::StencilAction::Increment:
|
||||
// Saturated increment
|
||||
return std::min<u8>(old_stencil, 254) + 1;
|
||||
|
||||
case FramebufferRegs::StencilAction::Decrement:
|
||||
// Saturated decrement
|
||||
return std::max<u8>(old_stencil, 1) - 1;
|
||||
|
||||
case FramebufferRegs::StencilAction::Invert:
|
||||
return ~old_stencil;
|
||||
|
||||
case FramebufferRegs::StencilAction::IncrementWrap:
|
||||
return old_stencil + 1;
|
||||
|
||||
case FramebufferRegs::StencilAction::DecrementWrap:
|
||||
return old_stencil - 1;
|
||||
|
||||
default:
|
||||
LOG_CRITICAL(HW_GPU, "Unknown stencil action {:x}", (int)action);
|
||||
UNIMPLEMENTED();
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
Common::Vec4<u8> EvaluateBlendEquation(const Common::Vec4<u8>& src,
|
||||
const Common::Vec4<u8>& srcfactor,
|
||||
const Common::Vec4<u8>& dest,
|
||||
const Common::Vec4<u8>& destfactor,
|
||||
FramebufferRegs::BlendEquation equation) {
|
||||
Common::Vec4<int> result;
|
||||
|
||||
auto src_result = (src * srcfactor).Cast<int>();
|
||||
auto dst_result = (dest * destfactor).Cast<int>();
|
||||
|
||||
switch (equation) {
|
||||
case FramebufferRegs::BlendEquation::Add:
|
||||
result = (src_result + dst_result) / 255;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::BlendEquation::Subtract:
|
||||
result = (src_result - dst_result) / 255;
|
||||
break;
|
||||
|
||||
case FramebufferRegs::BlendEquation::ReverseSubtract:
|
||||
result = (dst_result - src_result) / 255;
|
||||
break;
|
||||
|
||||
// TODO: How do these two actually work? OpenGL doesn't include the blend factors in the
|
||||
// min/max computations, but is this what the 3DS actually does?
|
||||
case FramebufferRegs::BlendEquation::Min:
|
||||
result.r() = std::min(src.r(), dest.r());
|
||||
result.g() = std::min(src.g(), dest.g());
|
||||
result.b() = std::min(src.b(), dest.b());
|
||||
result.a() = std::min(src.a(), dest.a());
|
||||
break;
|
||||
|
||||
case FramebufferRegs::BlendEquation::Max:
|
||||
result.r() = std::max(src.r(), dest.r());
|
||||
result.g() = std::max(src.g(), dest.g());
|
||||
result.b() = std::max(src.b(), dest.b());
|
||||
result.a() = std::max(src.a(), dest.a());
|
||||
break;
|
||||
|
||||
default:
|
||||
LOG_CRITICAL(HW_GPU, "Unknown RGB blend equation 0x{:x}", equation);
|
||||
UNIMPLEMENTED();
|
||||
}
|
||||
|
||||
return Common::Vec4<u8>(std::clamp(result.r(), 0, 255), std::clamp(result.g(), 0, 255),
|
||||
std::clamp(result.b(), 0, 255), std::clamp(result.a(), 0, 255));
|
||||
};
|
||||
|
||||
u8 LogicOp(u8 src, u8 dest, FramebufferRegs::LogicOp op) {
|
||||
switch (op) {
|
||||
case FramebufferRegs::LogicOp::Clear:
|
||||
return 0;
|
||||
|
||||
case FramebufferRegs::LogicOp::And:
|
||||
return src & dest;
|
||||
|
||||
case FramebufferRegs::LogicOp::AndReverse:
|
||||
return src & ~dest;
|
||||
|
||||
case FramebufferRegs::LogicOp::Copy:
|
||||
return src;
|
||||
|
||||
case FramebufferRegs::LogicOp::Set:
|
||||
return 255;
|
||||
|
||||
case FramebufferRegs::LogicOp::CopyInverted:
|
||||
return ~src;
|
||||
|
||||
case FramebufferRegs::LogicOp::NoOp:
|
||||
return dest;
|
||||
|
||||
case FramebufferRegs::LogicOp::Invert:
|
||||
return ~dest;
|
||||
|
||||
case FramebufferRegs::LogicOp::Nand:
|
||||
return ~(src & dest);
|
||||
|
||||
case FramebufferRegs::LogicOp::Or:
|
||||
return src | dest;
|
||||
|
||||
case FramebufferRegs::LogicOp::Nor:
|
||||
return ~(src | dest);
|
||||
|
||||
case FramebufferRegs::LogicOp::Xor:
|
||||
return src ^ dest;
|
||||
|
||||
case FramebufferRegs::LogicOp::Equiv:
|
||||
return ~(src ^ dest);
|
||||
|
||||
case FramebufferRegs::LogicOp::AndInverted:
|
||||
return ~src & dest;
|
||||
|
||||
case FramebufferRegs::LogicOp::OrReverse:
|
||||
return src | ~dest;
|
||||
|
||||
case FramebufferRegs::LogicOp::OrInverted:
|
||||
return ~src | dest;
|
||||
}
|
||||
|
||||
UNREACHABLE();
|
||||
};
|
||||
|
||||
// Decode/Encode for shadow map format. It is similar to D24S8 format, but the depth field is in
|
||||
// big-endian
|
||||
static const Common::Vec2<u32> DecodeD24S8Shadow(const u8* bytes) {
|
||||
return {static_cast<u32>((bytes[0] << 16) | (bytes[1] << 8) | bytes[2]), bytes[3]};
|
||||
}
|
||||
|
||||
static void EncodeD24X8Shadow(u32 depth, u8* bytes) {
|
||||
bytes[2] = depth & 0xFF;
|
||||
bytes[1] = (depth >> 8) & 0xFF;
|
||||
bytes[0] = (depth >> 16) & 0xFF;
|
||||
}
|
||||
|
||||
static void EncodeX24S8Shadow(u8 stencil, u8* bytes) {
|
||||
bytes[3] = stencil;
|
||||
}
|
||||
|
||||
void DrawShadowMapPixel(int x, int y, u32 depth, u8 stencil) {
|
||||
const auto& framebuffer = g_state.regs.framebuffer.framebuffer;
|
||||
const auto& shadow = g_state.regs.framebuffer.shadow;
|
||||
const PAddr addr = framebuffer.GetColorBufferPhysicalAddress();
|
||||
|
||||
y = framebuffer.height - y;
|
||||
|
||||
const u32 coarse_y = y & ~7;
|
||||
u32 bytes_per_pixel = 4;
|
||||
u32 dst_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) +
|
||||
coarse_y * framebuffer.width * bytes_per_pixel;
|
||||
u8* dst_pixel = VideoCore::g_memory->GetPhysicalPointer(addr) + dst_offset;
|
||||
|
||||
auto ref = DecodeD24S8Shadow(dst_pixel);
|
||||
u32 ref_z = ref.x;
|
||||
u32 ref_s = ref.y;
|
||||
|
||||
if (depth < ref_z) {
|
||||
if (stencil == 0) {
|
||||
EncodeD24X8Shadow(depth, dst_pixel);
|
||||
} else {
|
||||
float16 constant = float16::FromRaw(shadow.constant);
|
||||
float16 linear = float16::FromRaw(shadow.linear);
|
||||
float16 x = float16::FromFloat32(static_cast<float>(depth) / ref_z);
|
||||
float16 stencil_new = float16::FromFloat32(stencil) / (constant + linear * x);
|
||||
stencil = static_cast<u8>(std::clamp(stencil_new.ToFloat32(), 0.0f, 255.0f));
|
||||
|
||||
if (stencil < ref_s)
|
||||
EncodeX24S8Shadow(stencil, dst_pixel);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
} // namespace Pica::Rasterizer
|
||||
31
src/video_core/renderer_software/sw_framebuffer.h
Normal file
31
src/video_core/renderer_software/sw_framebuffer.h
Normal file
@@ -0,0 +1,31 @@
|
||||
// Copyright 2017 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "common/common_types.h"
|
||||
#include "common/vector_math.h"
|
||||
#include "video_core/regs_framebuffer.h"
|
||||
|
||||
namespace Pica::Rasterizer {
|
||||
|
||||
void DrawPixel(int x, int y, const Common::Vec4<u8>& color);
|
||||
const Common::Vec4<u8> GetPixel(int x, int y);
|
||||
u32 GetDepth(int x, int y);
|
||||
u8 GetStencil(int x, int y);
|
||||
void SetDepth(int x, int y, u32 value);
|
||||
void SetStencil(int x, int y, u8 value);
|
||||
u8 PerformStencilAction(FramebufferRegs::StencilAction action, u8 old_stencil, u8 ref);
|
||||
|
||||
Common::Vec4<u8> EvaluateBlendEquation(const Common::Vec4<u8>& src,
|
||||
const Common::Vec4<u8>& srcfactor,
|
||||
const Common::Vec4<u8>& dest,
|
||||
const Common::Vec4<u8>& destfactor,
|
||||
FramebufferRegs::BlendEquation equation);
|
||||
|
||||
u8 LogicOp(u8 src, u8 dest, FramebufferRegs::LogicOp op);
|
||||
|
||||
void DrawShadowMapPixel(int x, int y, u32 depth, u8 stencil);
|
||||
|
||||
} // namespace Pica::Rasterizer
|
||||
332
src/video_core/renderer_software/sw_lighting.cpp
Normal file
332
src/video_core/renderer_software/sw_lighting.cpp
Normal file
@@ -0,0 +1,332 @@
|
||||
// Copyright 2017 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include <algorithm>
|
||||
#include "video_core/renderer_software/sw_lighting.h"
|
||||
|
||||
namespace Pica {
|
||||
|
||||
static float LookupLightingLut(const Pica::State::Lighting& lighting, std::size_t lut_index,
|
||||
u8 index, float delta) {
|
||||
ASSERT_MSG(lut_index < lighting.luts.size(), "Out of range lut");
|
||||
ASSERT_MSG(index < lighting.luts[lut_index].size(), "Out of range index");
|
||||
|
||||
const auto& lut = lighting.luts[lut_index][index];
|
||||
|
||||
float lut_value = lut.ToFloat();
|
||||
float lut_diff = lut.DiffToFloat();
|
||||
|
||||
return lut_value + lut_diff * delta;
|
||||
}
|
||||
|
||||
std::tuple<Common::Vec4<u8>, Common::Vec4<u8>> ComputeFragmentsColors(
|
||||
const Pica::LightingRegs& lighting, const Pica::State::Lighting& lighting_state,
|
||||
const Common::Quaternion<float>& normquat, const Common::Vec3<float>& view,
|
||||
const Common::Vec4<u8> (&texture_color)[4]) {
|
||||
|
||||
Common::Vec4<float> shadow;
|
||||
if (lighting.config0.enable_shadow) {
|
||||
shadow = texture_color[lighting.config0.shadow_selector].Cast<float>() / 255.0f;
|
||||
if (lighting.config0.shadow_invert) {
|
||||
shadow = Common::MakeVec(1.0f, 1.0f, 1.0f, 1.0f) - shadow;
|
||||
}
|
||||
} else {
|
||||
shadow = Common::MakeVec(1.0f, 1.0f, 1.0f, 1.0f);
|
||||
}
|
||||
|
||||
Common::Vec3<float> surface_normal;
|
||||
Common::Vec3<float> surface_tangent;
|
||||
|
||||
if (lighting.config0.bump_mode != LightingRegs::LightingBumpMode::None) {
|
||||
Common::Vec3<float> perturbation =
|
||||
texture_color[lighting.config0.bump_selector].xyz().Cast<float>() / 127.5f -
|
||||
Common::MakeVec(1.0f, 1.0f, 1.0f);
|
||||
if (lighting.config0.bump_mode == LightingRegs::LightingBumpMode::NormalMap) {
|
||||
if (!lighting.config0.disable_bump_renorm) {
|
||||
const float z_square = 1 - perturbation.xy().Length2();
|
||||
perturbation.z = std::sqrt(std::max(z_square, 0.0f));
|
||||
}
|
||||
surface_normal = perturbation;
|
||||
surface_tangent = Common::MakeVec(1.0f, 0.0f, 0.0f);
|
||||
} else if (lighting.config0.bump_mode == LightingRegs::LightingBumpMode::TangentMap) {
|
||||
surface_normal = Common::MakeVec(0.0f, 0.0f, 1.0f);
|
||||
surface_tangent = perturbation;
|
||||
} else {
|
||||
LOG_ERROR(HW_GPU, "Unknown bump mode {}",
|
||||
static_cast<u32>(lighting.config0.bump_mode.Value()));
|
||||
}
|
||||
} else {
|
||||
surface_normal = Common::MakeVec(0.0f, 0.0f, 1.0f);
|
||||
surface_tangent = Common::MakeVec(1.0f, 0.0f, 0.0f);
|
||||
}
|
||||
|
||||
// Use the normalized the quaternion when performing the rotation
|
||||
auto normal = Common::QuaternionRotate(normquat, surface_normal);
|
||||
auto tangent = Common::QuaternionRotate(normquat, surface_tangent);
|
||||
|
||||
Common::Vec4<float> diffuse_sum = {0.0f, 0.0f, 0.0f, 1.0f};
|
||||
Common::Vec4<float> specular_sum = {0.0f, 0.0f, 0.0f, 1.0f};
|
||||
|
||||
for (unsigned light_index = 0; light_index <= lighting.max_light_index; ++light_index) {
|
||||
unsigned num = lighting.light_enable.GetNum(light_index);
|
||||
const auto& light_config = lighting.light[num];
|
||||
|
||||
Common::Vec3<float> refl_value = {};
|
||||
Common::Vec3<float> position = {float16::FromRaw(light_config.x).ToFloat32(),
|
||||
float16::FromRaw(light_config.y).ToFloat32(),
|
||||
float16::FromRaw(light_config.z).ToFloat32()};
|
||||
Common::Vec3<float> light_vector;
|
||||
|
||||
if (light_config.config.directional)
|
||||
light_vector = position;
|
||||
else
|
||||
light_vector = position + view;
|
||||
|
||||
[[maybe_unused]] float length = light_vector.Normalize();
|
||||
|
||||
Common::Vec3<float> norm_view = view.Normalized();
|
||||
Common::Vec3<float> half_vector = norm_view + light_vector;
|
||||
|
||||
float dist_atten = 1.0f;
|
||||
if (!lighting.IsDistAttenDisabled(num)) {
|
||||
auto distance = (-view - position).Length();
|
||||
float scale = Pica::float20::FromRaw(light_config.dist_atten_scale).ToFloat32();
|
||||
float bias = Pica::float20::FromRaw(light_config.dist_atten_bias).ToFloat32();
|
||||
std::size_t lut =
|
||||
static_cast<std::size_t>(LightingRegs::LightingSampler::DistanceAttenuation) + num;
|
||||
|
||||
float sample_loc = std::clamp(scale * distance + bias, 0.0f, 1.0f);
|
||||
|
||||
u8 lutindex =
|
||||
static_cast<u8>(std::clamp(std::floor(sample_loc * 256.0f), 0.0f, 255.0f));
|
||||
float delta = sample_loc * 256 - lutindex;
|
||||
dist_atten = LookupLightingLut(lighting_state, lut, lutindex, delta);
|
||||
}
|
||||
|
||||
auto GetLutValue = [&](LightingRegs::LightingLutInput input, bool abs,
|
||||
LightingRegs::LightingScale scale_enum,
|
||||
LightingRegs::LightingSampler sampler) {
|
||||
float result = 0.0f;
|
||||
|
||||
switch (input) {
|
||||
case LightingRegs::LightingLutInput::NH:
|
||||
result = Common::Dot(normal, half_vector.Normalized());
|
||||
break;
|
||||
|
||||
case LightingRegs::LightingLutInput::VH:
|
||||
result = Common::Dot(norm_view, half_vector.Normalized());
|
||||
break;
|
||||
|
||||
case LightingRegs::LightingLutInput::NV:
|
||||
result = Common::Dot(normal, norm_view);
|
||||
break;
|
||||
|
||||
case LightingRegs::LightingLutInput::LN:
|
||||
result = Common::Dot(light_vector, normal);
|
||||
break;
|
||||
|
||||
case LightingRegs::LightingLutInput::SP: {
|
||||
Common::Vec3<s32> spot_dir{light_config.spot_x.Value(), light_config.spot_y.Value(),
|
||||
light_config.spot_z.Value()};
|
||||
result = Common::Dot(light_vector, spot_dir.Cast<float>() / 2047.0f);
|
||||
break;
|
||||
}
|
||||
case LightingRegs::LightingLutInput::CP:
|
||||
if (lighting.config0.config == LightingRegs::LightingConfig::Config7) {
|
||||
const Common::Vec3<float> norm_half_vector = half_vector.Normalized();
|
||||
const Common::Vec3<float> half_vector_proj =
|
||||
norm_half_vector - normal * Common::Dot(normal, norm_half_vector);
|
||||
result = Common::Dot(half_vector_proj, tangent);
|
||||
} else {
|
||||
result = 0.0f;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
LOG_CRITICAL(HW_GPU, "Unknown lighting LUT input {}", input);
|
||||
UNIMPLEMENTED();
|
||||
result = 0.0f;
|
||||
}
|
||||
|
||||
u8 index;
|
||||
float delta;
|
||||
|
||||
if (abs) {
|
||||
if (light_config.config.two_sided_diffuse)
|
||||
result = std::abs(result);
|
||||
else
|
||||
result = std::max(result, 0.0f);
|
||||
|
||||
float flr = std::floor(result * 256.0f);
|
||||
index = static_cast<u8>(std::clamp(flr, 0.0f, 255.0f));
|
||||
delta = result * 256 - index;
|
||||
} else {
|
||||
float flr = std::floor(result * 128.0f);
|
||||
s8 signed_index = static_cast<s8>(std::clamp(flr, -128.0f, 127.0f));
|
||||
delta = result * 128.0f - signed_index;
|
||||
index = static_cast<u8>(signed_index);
|
||||
}
|
||||
|
||||
float scale = lighting.lut_scale.GetScale(scale_enum);
|
||||
return scale * LookupLightingLut(lighting_state, static_cast<std::size_t>(sampler),
|
||||
index, delta);
|
||||
};
|
||||
|
||||
// If enabled, compute spot light attenuation value
|
||||
float spot_atten = 1.0f;
|
||||
if (!lighting.IsSpotAttenDisabled(num) &&
|
||||
LightingRegs::IsLightingSamplerSupported(
|
||||
lighting.config0.config, LightingRegs::LightingSampler::SpotlightAttenuation)) {
|
||||
auto lut = LightingRegs::SpotlightAttenuationSampler(num);
|
||||
spot_atten = GetLutValue(lighting.lut_input.sp, lighting.abs_lut_input.disable_sp == 0,
|
||||
lighting.lut_scale.sp, lut);
|
||||
}
|
||||
|
||||
// Specular 0 component
|
||||
float d0_lut_value = 1.0f;
|
||||
if (lighting.config1.disable_lut_d0 == 0 &&
|
||||
LightingRegs::IsLightingSamplerSupported(
|
||||
lighting.config0.config, LightingRegs::LightingSampler::Distribution0)) {
|
||||
d0_lut_value =
|
||||
GetLutValue(lighting.lut_input.d0, lighting.abs_lut_input.disable_d0 == 0,
|
||||
lighting.lut_scale.d0, LightingRegs::LightingSampler::Distribution0);
|
||||
}
|
||||
|
||||
Common::Vec3<float> specular_0 = d0_lut_value * light_config.specular_0.ToVec3f();
|
||||
|
||||
// If enabled, lookup ReflectRed value, otherwise, 1.0 is used
|
||||
if (lighting.config1.disable_lut_rr == 0 &&
|
||||
LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
|
||||
LightingRegs::LightingSampler::ReflectRed)) {
|
||||
refl_value.x =
|
||||
GetLutValue(lighting.lut_input.rr, lighting.abs_lut_input.disable_rr == 0,
|
||||
lighting.lut_scale.rr, LightingRegs::LightingSampler::ReflectRed);
|
||||
} else {
|
||||
refl_value.x = 1.0f;
|
||||
}
|
||||
|
||||
// If enabled, lookup ReflectGreen value, otherwise, ReflectRed value is used
|
||||
if (lighting.config1.disable_lut_rg == 0 &&
|
||||
LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
|
||||
LightingRegs::LightingSampler::ReflectGreen)) {
|
||||
refl_value.y =
|
||||
GetLutValue(lighting.lut_input.rg, lighting.abs_lut_input.disable_rg == 0,
|
||||
lighting.lut_scale.rg, LightingRegs::LightingSampler::ReflectGreen);
|
||||
} else {
|
||||
refl_value.y = refl_value.x;
|
||||
}
|
||||
|
||||
// If enabled, lookup ReflectBlue value, otherwise, ReflectRed value is used
|
||||
if (lighting.config1.disable_lut_rb == 0 &&
|
||||
LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
|
||||
LightingRegs::LightingSampler::ReflectBlue)) {
|
||||
refl_value.z =
|
||||
GetLutValue(lighting.lut_input.rb, lighting.abs_lut_input.disable_rb == 0,
|
||||
lighting.lut_scale.rb, LightingRegs::LightingSampler::ReflectBlue);
|
||||
} else {
|
||||
refl_value.z = refl_value.x;
|
||||
}
|
||||
|
||||
// Specular 1 component
|
||||
float d1_lut_value = 1.0f;
|
||||
if (lighting.config1.disable_lut_d1 == 0 &&
|
||||
LightingRegs::IsLightingSamplerSupported(
|
||||
lighting.config0.config, LightingRegs::LightingSampler::Distribution1)) {
|
||||
d1_lut_value =
|
||||
GetLutValue(lighting.lut_input.d1, lighting.abs_lut_input.disable_d1 == 0,
|
||||
lighting.lut_scale.d1, LightingRegs::LightingSampler::Distribution1);
|
||||
}
|
||||
|
||||
Common::Vec3<float> specular_1 =
|
||||
d1_lut_value * refl_value * light_config.specular_1.ToVec3f();
|
||||
|
||||
// Fresnel
|
||||
// Note: only the last entry in the light slots applies the Fresnel factor
|
||||
if (light_index == lighting.max_light_index && lighting.config1.disable_lut_fr == 0 &&
|
||||
LightingRegs::IsLightingSamplerSupported(lighting.config0.config,
|
||||
LightingRegs::LightingSampler::Fresnel)) {
|
||||
|
||||
float lut_value =
|
||||
GetLutValue(lighting.lut_input.fr, lighting.abs_lut_input.disable_fr == 0,
|
||||
lighting.lut_scale.fr, LightingRegs::LightingSampler::Fresnel);
|
||||
|
||||
// Enabled for diffuse lighting alpha component
|
||||
if (lighting.config0.enable_primary_alpha) {
|
||||
diffuse_sum.a() = lut_value;
|
||||
}
|
||||
|
||||
// Enabled for the specular lighting alpha component
|
||||
if (lighting.config0.enable_secondary_alpha) {
|
||||
specular_sum.a() = lut_value;
|
||||
}
|
||||
}
|
||||
|
||||
auto dot_product = Common::Dot(light_vector, normal);
|
||||
if (light_config.config.two_sided_diffuse)
|
||||
dot_product = std::abs(dot_product);
|
||||
else
|
||||
dot_product = std::max(dot_product, 0.0f);
|
||||
|
||||
float clamp_highlights = 1.0f;
|
||||
if (lighting.config0.clamp_highlights) {
|
||||
clamp_highlights = dot_product == 0.0f ? 0.0f : 1.0f;
|
||||
}
|
||||
|
||||
if (light_config.config.geometric_factor_0 || light_config.config.geometric_factor_1) {
|
||||
float geo_factor = half_vector.Length2();
|
||||
geo_factor = geo_factor == 0.0f ? 0.0f : std::min(dot_product / geo_factor, 1.0f);
|
||||
if (light_config.config.geometric_factor_0) {
|
||||
specular_0 *= geo_factor;
|
||||
}
|
||||
if (light_config.config.geometric_factor_1) {
|
||||
specular_1 *= geo_factor;
|
||||
}
|
||||
}
|
||||
|
||||
auto diffuse =
|
||||
(light_config.diffuse.ToVec3f() * dot_product + light_config.ambient.ToVec3f()) *
|
||||
dist_atten * spot_atten;
|
||||
auto specular = (specular_0 + specular_1) * clamp_highlights * dist_atten * spot_atten;
|
||||
|
||||
if (!lighting.IsShadowDisabled(num)) {
|
||||
if (lighting.config0.shadow_primary) {
|
||||
diffuse = diffuse * shadow.xyz();
|
||||
}
|
||||
if (lighting.config0.shadow_secondary) {
|
||||
specular = specular * shadow.xyz();
|
||||
}
|
||||
}
|
||||
|
||||
diffuse_sum += Common::MakeVec(diffuse, 0.0f);
|
||||
specular_sum += Common::MakeVec(specular, 0.0f);
|
||||
}
|
||||
|
||||
if (lighting.config0.shadow_alpha) {
|
||||
// Alpha shadow also uses the Fresnel selecotr to determine which alpha to apply
|
||||
// Enabled for diffuse lighting alpha component
|
||||
if (lighting.config0.enable_primary_alpha) {
|
||||
diffuse_sum.a() *= shadow.w;
|
||||
}
|
||||
|
||||
// Enabled for the specular lighting alpha component
|
||||
if (lighting.config0.enable_secondary_alpha) {
|
||||
specular_sum.a() *= shadow.w;
|
||||
}
|
||||
}
|
||||
|
||||
diffuse_sum += Common::MakeVec(lighting.global_ambient.ToVec3f(), 0.0f);
|
||||
|
||||
auto diffuse = Common::MakeVec<float>(std::clamp(diffuse_sum.x, 0.0f, 1.0f) * 255,
|
||||
std::clamp(diffuse_sum.y, 0.0f, 1.0f) * 255,
|
||||
std::clamp(diffuse_sum.z, 0.0f, 1.0f) * 255,
|
||||
std::clamp(diffuse_sum.w, 0.0f, 1.0f) * 255)
|
||||
.Cast<u8>();
|
||||
auto specular = Common::MakeVec<float>(std::clamp(specular_sum.x, 0.0f, 1.0f) * 255,
|
||||
std::clamp(specular_sum.y, 0.0f, 1.0f) * 255,
|
||||
std::clamp(specular_sum.z, 0.0f, 1.0f) * 255,
|
||||
std::clamp(specular_sum.w, 0.0f, 1.0f) * 255)
|
||||
.Cast<u8>();
|
||||
return std::make_tuple(diffuse, specular);
|
||||
}
|
||||
|
||||
} // namespace Pica
|
||||
19
src/video_core/renderer_software/sw_lighting.h
Normal file
19
src/video_core/renderer_software/sw_lighting.h
Normal file
@@ -0,0 +1,19 @@
|
||||
// Copyright 2017 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <tuple>
|
||||
#include "common/quaternion.h"
|
||||
#include "common/vector_math.h"
|
||||
#include "video_core/pica_state.h"
|
||||
|
||||
namespace Pica {
|
||||
|
||||
std::tuple<Common::Vec4<u8>, Common::Vec4<u8>> ComputeFragmentsColors(
|
||||
const Pica::LightingRegs& lighting, const Pica::State::Lighting& lighting_state,
|
||||
const Common::Quaternion<float>& normquat, const Common::Vec3<float>& view,
|
||||
const Common::Vec4<u8> (&texture_color)[4]);
|
||||
|
||||
} // namespace Pica
|
||||
221
src/video_core/renderer_software/sw_proctex.cpp
Normal file
221
src/video_core/renderer_software/sw_proctex.cpp
Normal file
@@ -0,0 +1,221 @@
|
||||
// Copyright 2017 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include <array>
|
||||
#include <cmath>
|
||||
#include "common/math_util.h"
|
||||
#include "video_core/renderer_software/sw_proctex.h"
|
||||
|
||||
namespace Pica::Rasterizer {
|
||||
|
||||
using ProcTexClamp = TexturingRegs::ProcTexClamp;
|
||||
using ProcTexShift = TexturingRegs::ProcTexShift;
|
||||
using ProcTexCombiner = TexturingRegs::ProcTexCombiner;
|
||||
using ProcTexFilter = TexturingRegs::ProcTexFilter;
|
||||
|
||||
static float LookupLUT(const std::array<State::ProcTex::ValueEntry, 128>& lut, float coord) {
|
||||
// For NoiseLUT/ColorMap/AlphaMap, coord=0.0 is lut[0], coord=127.0/128.0 is lut[127] and
|
||||
// coord=1.0 is lut[127]+lut_diff[127]. For other indices, the result is interpolated using
|
||||
// value entries and difference entries.
|
||||
coord *= 128;
|
||||
const int index_int = std::min(static_cast<int>(coord), 127);
|
||||
const float frac = coord - index_int;
|
||||
return lut[index_int].ToFloat() + frac * lut[index_int].DiffToFloat();
|
||||
}
|
||||
|
||||
// These function are used to generate random noise for procedural texture. Their results are
|
||||
// verified against real hardware, but it's not known if the algorithm is the same as hardware.
|
||||
static unsigned int NoiseRand1D(unsigned int v) {
|
||||
static constexpr std::array<unsigned int, 16> table{
|
||||
{0, 4, 10, 8, 4, 9, 7, 12, 5, 15, 13, 14, 11, 15, 2, 11}};
|
||||
return ((v % 9 + 2) * 3 & 0xF) ^ table[(v / 9) & 0xF];
|
||||
}
|
||||
|
||||
static float NoiseRand2D(unsigned int x, unsigned int y) {
|
||||
static constexpr std::array<unsigned int, 16> table{
|
||||
{10, 2, 15, 8, 0, 7, 4, 5, 5, 13, 2, 6, 13, 9, 3, 14}};
|
||||
unsigned int u2 = NoiseRand1D(x);
|
||||
unsigned int v2 = NoiseRand1D(y);
|
||||
v2 += ((u2 & 3) == 1) ? 4 : 0;
|
||||
v2 ^= (u2 & 1) * 6;
|
||||
v2 += 10 + u2;
|
||||
v2 &= 0xF;
|
||||
v2 ^= table[u2];
|
||||
return -1.0f + v2 * 2.0f / 15.0f;
|
||||
}
|
||||
|
||||
static float NoiseCoef(float u, float v, const TexturingRegs& regs, const State::ProcTex& state) {
|
||||
const float freq_u = float16::FromRaw(regs.proctex_noise_frequency.u).ToFloat32();
|
||||
const float freq_v = float16::FromRaw(regs.proctex_noise_frequency.v).ToFloat32();
|
||||
const float phase_u = float16::FromRaw(regs.proctex_noise_u.phase).ToFloat32();
|
||||
const float phase_v = float16::FromRaw(regs.proctex_noise_v.phase).ToFloat32();
|
||||
const float x = 9 * freq_u * std::abs(u + phase_u);
|
||||
const float y = 9 * freq_v * std::abs(v + phase_v);
|
||||
const int x_int = static_cast<int>(x);
|
||||
const int y_int = static_cast<int>(y);
|
||||
const float x_frac = x - x_int;
|
||||
const float y_frac = y - y_int;
|
||||
|
||||
const float g0 = NoiseRand2D(x_int, y_int) * (x_frac + y_frac);
|
||||
const float g1 = NoiseRand2D(x_int + 1, y_int) * (x_frac + y_frac - 1);
|
||||
const float g2 = NoiseRand2D(x_int, y_int + 1) * (x_frac + y_frac - 1);
|
||||
const float g3 = NoiseRand2D(x_int + 1, y_int + 1) * (x_frac + y_frac - 2);
|
||||
const float x_noise = LookupLUT(state.noise_table, x_frac);
|
||||
const float y_noise = LookupLUT(state.noise_table, y_frac);
|
||||
return Common::BilinearInterp(g0, g1, g2, g3, x_noise, y_noise);
|
||||
}
|
||||
|
||||
static float GetShiftOffset(float v, ProcTexShift mode, ProcTexClamp clamp_mode) {
|
||||
const float offset = (clamp_mode == ProcTexClamp::MirroredRepeat) ? 1 : 0.5f;
|
||||
switch (mode) {
|
||||
case ProcTexShift::None:
|
||||
return 0;
|
||||
case ProcTexShift::Odd:
|
||||
return offset * (((int)v / 2) % 2);
|
||||
case ProcTexShift::Even:
|
||||
return offset * ((((int)v + 1) / 2) % 2);
|
||||
default:
|
||||
LOG_CRITICAL(HW_GPU, "Unknown shift mode {}", mode);
|
||||
return 0;
|
||||
}
|
||||
};
|
||||
|
||||
static void ClampCoord(float& coord, ProcTexClamp mode) {
|
||||
switch (mode) {
|
||||
case ProcTexClamp::ToZero:
|
||||
if (coord > 1.0f)
|
||||
coord = 0.0f;
|
||||
break;
|
||||
case ProcTexClamp::ToEdge:
|
||||
coord = std::min(coord, 1.0f);
|
||||
break;
|
||||
case ProcTexClamp::SymmetricalRepeat:
|
||||
coord = coord - std::floor(coord);
|
||||
break;
|
||||
case ProcTexClamp::MirroredRepeat: {
|
||||
int integer = static_cast<int>(coord);
|
||||
float frac = coord - integer;
|
||||
coord = (integer % 2) == 0 ? frac : (1.0f - frac);
|
||||
break;
|
||||
}
|
||||
case ProcTexClamp::Pulse:
|
||||
if (coord <= 0.5f)
|
||||
coord = 0.0f;
|
||||
else
|
||||
coord = 1.0f;
|
||||
break;
|
||||
default:
|
||||
LOG_CRITICAL(HW_GPU, "Unknown clamp mode {}", mode);
|
||||
coord = std::min(coord, 1.0f);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static float CombineAndMap(float u, float v, ProcTexCombiner combiner,
|
||||
const std::array<State::ProcTex::ValueEntry, 128>& map_table) {
|
||||
float f;
|
||||
switch (combiner) {
|
||||
case ProcTexCombiner::U:
|
||||
f = u;
|
||||
break;
|
||||
case ProcTexCombiner::U2:
|
||||
f = u * u;
|
||||
break;
|
||||
case TexturingRegs::ProcTexCombiner::V:
|
||||
f = v;
|
||||
break;
|
||||
case TexturingRegs::ProcTexCombiner::V2:
|
||||
f = v * v;
|
||||
break;
|
||||
case TexturingRegs::ProcTexCombiner::Add:
|
||||
f = (u + v) * 0.5f;
|
||||
break;
|
||||
case TexturingRegs::ProcTexCombiner::Add2:
|
||||
f = (u * u + v * v) * 0.5f;
|
||||
break;
|
||||
case TexturingRegs::ProcTexCombiner::SqrtAdd2:
|
||||
f = std::min(std::sqrt(u * u + v * v), 1.0f);
|
||||
break;
|
||||
case TexturingRegs::ProcTexCombiner::Min:
|
||||
f = std::min(u, v);
|
||||
break;
|
||||
case TexturingRegs::ProcTexCombiner::Max:
|
||||
f = std::max(u, v);
|
||||
break;
|
||||
case TexturingRegs::ProcTexCombiner::RMax:
|
||||
f = std::min(((u + v) * 0.5f + std::sqrt(u * u + v * v)) * 0.5f, 1.0f);
|
||||
break;
|
||||
default:
|
||||
LOG_CRITICAL(HW_GPU, "Unknown combiner {}", combiner);
|
||||
f = 0.0f;
|
||||
break;
|
||||
}
|
||||
return LookupLUT(map_table, f);
|
||||
}
|
||||
|
||||
Common::Vec4<u8> ProcTex(float u, float v, const TexturingRegs& regs, const State::ProcTex& state) {
|
||||
u = std::abs(u);
|
||||
v = std::abs(v);
|
||||
|
||||
// Get shift offset before noise generation
|
||||
const float u_shift = GetShiftOffset(v, regs.proctex.u_shift, regs.proctex.u_clamp);
|
||||
const float v_shift = GetShiftOffset(u, regs.proctex.v_shift, regs.proctex.v_clamp);
|
||||
|
||||
// Generate noise
|
||||
if (regs.proctex.noise_enable) {
|
||||
float noise = NoiseCoef(u, v, regs, state);
|
||||
u += noise * regs.proctex_noise_u.amplitude / 4095.0f;
|
||||
v += noise * regs.proctex_noise_v.amplitude / 4095.0f;
|
||||
u = std::abs(u);
|
||||
v = std::abs(v);
|
||||
}
|
||||
|
||||
// Shift
|
||||
u += u_shift;
|
||||
v += v_shift;
|
||||
|
||||
// Clamp
|
||||
ClampCoord(u, regs.proctex.u_clamp);
|
||||
ClampCoord(v, regs.proctex.v_clamp);
|
||||
|
||||
// Combine and map
|
||||
const float lut_coord = CombineAndMap(u, v, regs.proctex.color_combiner, state.color_map_table);
|
||||
|
||||
// Look up the color
|
||||
// For the color lut, coord=0.0 is lut[offset] and coord=1.0 is lut[offset+width-1]
|
||||
const u32 offset = regs.proctex_lut_offset.level0;
|
||||
const u32 width = regs.proctex_lut.width;
|
||||
const float index = offset + (lut_coord * (width - 1));
|
||||
Common::Vec4<u8> final_color;
|
||||
// TODO(wwylele): implement mipmap
|
||||
switch (regs.proctex_lut.filter) {
|
||||
case ProcTexFilter::Linear:
|
||||
case ProcTexFilter::LinearMipmapLinear:
|
||||
case ProcTexFilter::LinearMipmapNearest: {
|
||||
const int index_int = static_cast<int>(index);
|
||||
const float frac = index - index_int;
|
||||
const auto color_value = state.color_table[index_int].ToVector().Cast<float>();
|
||||
const auto color_diff = state.color_diff_table[index_int].ToVector().Cast<float>();
|
||||
final_color = (color_value + frac * color_diff).Cast<u8>();
|
||||
break;
|
||||
}
|
||||
case ProcTexFilter::Nearest:
|
||||
case ProcTexFilter::NearestMipmapLinear:
|
||||
case ProcTexFilter::NearestMipmapNearest:
|
||||
final_color = state.color_table[static_cast<int>(std::round(index))].ToVector();
|
||||
break;
|
||||
}
|
||||
|
||||
if (regs.proctex.separate_alpha) {
|
||||
// Note: in separate alpha mode, the alpha channel skips the color LUT look up stage. It
|
||||
// uses the output of CombineAndMap directly instead.
|
||||
const float final_alpha =
|
||||
CombineAndMap(u, v, regs.proctex.alpha_combiner, state.alpha_map_table);
|
||||
return Common::MakeVec<u8>(final_color.rgb(), static_cast<u8>(final_alpha * 255));
|
||||
} else {
|
||||
return final_color;
|
||||
}
|
||||
}
|
||||
|
||||
} // namespace Pica::Rasterizer
|
||||
16
src/video_core/renderer_software/sw_proctex.h
Normal file
16
src/video_core/renderer_software/sw_proctex.h
Normal file
@@ -0,0 +1,16 @@
|
||||
// Copyright 2017 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "common/common_types.h"
|
||||
#include "common/vector_math.h"
|
||||
#include "video_core/pica_state.h"
|
||||
|
||||
namespace Pica::Rasterizer {
|
||||
|
||||
/// Generates procedural texture color for the given coordinates
|
||||
Common::Vec4<u8> ProcTex(float u, float v, const TexturingRegs& regs, const State::ProcTex& state);
|
||||
|
||||
} // namespace Pica::Rasterizer
|
||||
16
src/video_core/renderer_software/sw_rasterizer.cpp
Normal file
16
src/video_core/renderer_software/sw_rasterizer.cpp
Normal file
@@ -0,0 +1,16 @@
|
||||
// Copyright 2015 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include "video_core/renderer_software/sw_clipper.h"
|
||||
#include "video_core/renderer_software/sw_rasterizer.h"
|
||||
|
||||
namespace VideoCore {
|
||||
|
||||
void RasterizerSoftware::AddTriangle(const Pica::Shader::OutputVertex& v0,
|
||||
const Pica::Shader::OutputVertex& v1,
|
||||
const Pica::Shader::OutputVertex& v2) {
|
||||
Pica::Clipper::ProcessTriangle(v0, v1, v2);
|
||||
}
|
||||
|
||||
} // namespace VideoCore
|
||||
28
src/video_core/renderer_software/sw_rasterizer.h
Normal file
28
src/video_core/renderer_software/sw_rasterizer.h
Normal file
@@ -0,0 +1,28 @@
|
||||
// Copyright 2015 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "common/common_types.h"
|
||||
#include "video_core/rasterizer_interface.h"
|
||||
|
||||
namespace Pica::Shader {
|
||||
struct OutputVertex;
|
||||
} // namespace Pica::Shader
|
||||
|
||||
namespace VideoCore {
|
||||
|
||||
class RasterizerSoftware : public RasterizerInterface {
|
||||
void AddTriangle(const Pica::Shader::OutputVertex& v0, const Pica::Shader::OutputVertex& v1,
|
||||
const Pica::Shader::OutputVertex& v2) override;
|
||||
void DrawTriangles() override {}
|
||||
void NotifyPicaRegisterChanged(u32 id) override {}
|
||||
void FlushAll() override {}
|
||||
void FlushRegion(PAddr addr, u32 size) override {}
|
||||
void InvalidateRegion(PAddr addr, u32 size) override {}
|
||||
void FlushAndInvalidateRegion(PAddr addr, u32 size) override {}
|
||||
void ClearAll(bool flush) override {}
|
||||
};
|
||||
|
||||
} // namespace VideoCore
|
||||
240
src/video_core/renderer_software/sw_texturing.cpp
Normal file
240
src/video_core/renderer_software/sw_texturing.cpp
Normal file
@@ -0,0 +1,240 @@
|
||||
// Copyright 2017 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include <algorithm>
|
||||
#include "common/assert.h"
|
||||
#include "common/common_types.h"
|
||||
#include "common/vector_math.h"
|
||||
#include "video_core/regs_texturing.h"
|
||||
#include "video_core/renderer_software/sw_texturing.h"
|
||||
|
||||
namespace Pica::Rasterizer {
|
||||
|
||||
using TevStageConfig = TexturingRegs::TevStageConfig;
|
||||
|
||||
int GetWrappedTexCoord(TexturingRegs::TextureConfig::WrapMode mode, int val, unsigned size) {
|
||||
switch (mode) {
|
||||
case TexturingRegs::TextureConfig::ClampToEdge2:
|
||||
// For negative coordinate, ClampToEdge2 behaves the same as Repeat
|
||||
if (val < 0) {
|
||||
return static_cast<int>(static_cast<unsigned>(val) % size);
|
||||
}
|
||||
// [[fallthrough]]
|
||||
case TexturingRegs::TextureConfig::ClampToEdge:
|
||||
val = std::max(val, 0);
|
||||
val = std::min(val, static_cast<int>(size) - 1);
|
||||
return val;
|
||||
|
||||
case TexturingRegs::TextureConfig::ClampToBorder:
|
||||
return val;
|
||||
|
||||
case TexturingRegs::TextureConfig::ClampToBorder2:
|
||||
// For ClampToBorder2, the case of positive coordinate beyond the texture size is already
|
||||
// handled outside. Here we only handle the negative coordinate in the same way as Repeat.
|
||||
case TexturingRegs::TextureConfig::Repeat2:
|
||||
case TexturingRegs::TextureConfig::Repeat3:
|
||||
case TexturingRegs::TextureConfig::Repeat:
|
||||
return static_cast<int>(static_cast<unsigned>(val) % size);
|
||||
|
||||
case TexturingRegs::TextureConfig::MirroredRepeat: {
|
||||
unsigned int coord = (static_cast<unsigned>(val) % (2 * size));
|
||||
if (coord >= size)
|
||||
coord = 2 * size - 1 - coord;
|
||||
return static_cast<int>(coord);
|
||||
}
|
||||
|
||||
default:
|
||||
LOG_ERROR(HW_GPU, "Unknown texture coordinate wrapping mode {:x}", (int)mode);
|
||||
UNIMPLEMENTED();
|
||||
return 0;
|
||||
}
|
||||
};
|
||||
|
||||
Common::Vec3<u8> GetColorModifier(TevStageConfig::ColorModifier factor,
|
||||
const Common::Vec4<u8>& values) {
|
||||
using ColorModifier = TevStageConfig::ColorModifier;
|
||||
|
||||
switch (factor) {
|
||||
case ColorModifier::SourceColor:
|
||||
return values.rgb();
|
||||
|
||||
case ColorModifier::OneMinusSourceColor:
|
||||
return (Common::Vec3<u8>(255, 255, 255) - values.rgb()).Cast<u8>();
|
||||
|
||||
case ColorModifier::SourceAlpha:
|
||||
return values.aaa();
|
||||
|
||||
case ColorModifier::OneMinusSourceAlpha:
|
||||
return (Common::Vec3<u8>(255, 255, 255) - values.aaa()).Cast<u8>();
|
||||
|
||||
case ColorModifier::SourceRed:
|
||||
return values.rrr();
|
||||
|
||||
case ColorModifier::OneMinusSourceRed:
|
||||
return (Common::Vec3<u8>(255, 255, 255) - values.rrr()).Cast<u8>();
|
||||
|
||||
case ColorModifier::SourceGreen:
|
||||
return values.ggg();
|
||||
|
||||
case ColorModifier::OneMinusSourceGreen:
|
||||
return (Common::Vec3<u8>(255, 255, 255) - values.ggg()).Cast<u8>();
|
||||
|
||||
case ColorModifier::SourceBlue:
|
||||
return values.bbb();
|
||||
|
||||
case ColorModifier::OneMinusSourceBlue:
|
||||
return (Common::Vec3<u8>(255, 255, 255) - values.bbb()).Cast<u8>();
|
||||
}
|
||||
|
||||
UNREACHABLE();
|
||||
};
|
||||
|
||||
u8 GetAlphaModifier(TevStageConfig::AlphaModifier factor, const Common::Vec4<u8>& values) {
|
||||
using AlphaModifier = TevStageConfig::AlphaModifier;
|
||||
|
||||
switch (factor) {
|
||||
case AlphaModifier::SourceAlpha:
|
||||
return values.a();
|
||||
|
||||
case AlphaModifier::OneMinusSourceAlpha:
|
||||
return 255 - values.a();
|
||||
|
||||
case AlphaModifier::SourceRed:
|
||||
return values.r();
|
||||
|
||||
case AlphaModifier::OneMinusSourceRed:
|
||||
return 255 - values.r();
|
||||
|
||||
case AlphaModifier::SourceGreen:
|
||||
return values.g();
|
||||
|
||||
case AlphaModifier::OneMinusSourceGreen:
|
||||
return 255 - values.g();
|
||||
|
||||
case AlphaModifier::SourceBlue:
|
||||
return values.b();
|
||||
|
||||
case AlphaModifier::OneMinusSourceBlue:
|
||||
return 255 - values.b();
|
||||
}
|
||||
|
||||
UNREACHABLE();
|
||||
};
|
||||
|
||||
Common::Vec3<u8> ColorCombine(TevStageConfig::Operation op, const Common::Vec3<u8> input[3]) {
|
||||
using Operation = TevStageConfig::Operation;
|
||||
|
||||
switch (op) {
|
||||
case Operation::Replace:
|
||||
return input[0];
|
||||
|
||||
case Operation::Modulate:
|
||||
return ((input[0] * input[1]) / 255).Cast<u8>();
|
||||
|
||||
case Operation::Add: {
|
||||
auto result = input[0] + input[1];
|
||||
result.r() = std::min(255, result.r());
|
||||
result.g() = std::min(255, result.g());
|
||||
result.b() = std::min(255, result.b());
|
||||
return result.Cast<u8>();
|
||||
}
|
||||
|
||||
case Operation::AddSigned: {
|
||||
// TODO(bunnei): Verify that the color conversion from (float) 0.5f to
|
||||
// (byte) 128 is correct
|
||||
auto result =
|
||||
input[0].Cast<int>() + input[1].Cast<int>() - Common::MakeVec<int>(128, 128, 128);
|
||||
result.r() = std::clamp<int>(result.r(), 0, 255);
|
||||
result.g() = std::clamp<int>(result.g(), 0, 255);
|
||||
result.b() = std::clamp<int>(result.b(), 0, 255);
|
||||
return result.Cast<u8>();
|
||||
}
|
||||
|
||||
case Operation::Lerp:
|
||||
return ((input[0] * input[2] +
|
||||
input[1] * (Common::MakeVec<u8>(255, 255, 255) - input[2]).Cast<u8>()) /
|
||||
255)
|
||||
.Cast<u8>();
|
||||
|
||||
case Operation::Subtract: {
|
||||
auto result = input[0].Cast<int>() - input[1].Cast<int>();
|
||||
result.r() = std::max(0, result.r());
|
||||
result.g() = std::max(0, result.g());
|
||||
result.b() = std::max(0, result.b());
|
||||
return result.Cast<u8>();
|
||||
}
|
||||
|
||||
case Operation::MultiplyThenAdd: {
|
||||
auto result = (input[0] * input[1] + 255 * input[2].Cast<int>()) / 255;
|
||||
result.r() = std::min(255, result.r());
|
||||
result.g() = std::min(255, result.g());
|
||||
result.b() = std::min(255, result.b());
|
||||
return result.Cast<u8>();
|
||||
}
|
||||
|
||||
case Operation::AddThenMultiply: {
|
||||
auto result = input[0] + input[1];
|
||||
result.r() = std::min(255, result.r());
|
||||
result.g() = std::min(255, result.g());
|
||||
result.b() = std::min(255, result.b());
|
||||
result = (result * input[2].Cast<int>()) / 255;
|
||||
return result.Cast<u8>();
|
||||
}
|
||||
case Operation::Dot3_RGB:
|
||||
case Operation::Dot3_RGBA: {
|
||||
// Not fully accurate. Worst case scenario seems to yield a +/-3 error. Some HW results
|
||||
// indicate that the per-component computation can't have a higher precision than 1/256,
|
||||
// while dot3_rgb((0x80,g0,b0), (0x7F,g1,b1)) and dot3_rgb((0x80,g0,b0), (0x80,g1,b1)) give
|
||||
// different results.
|
||||
int result = ((input[0].r() * 2 - 255) * (input[1].r() * 2 - 255) + 128) / 256 +
|
||||
((input[0].g() * 2 - 255) * (input[1].g() * 2 - 255) + 128) / 256 +
|
||||
((input[0].b() * 2 - 255) * (input[1].b() * 2 - 255) + 128) / 256;
|
||||
result = std::max(0, std::min(255, result));
|
||||
return {(u8)result, (u8)result, (u8)result};
|
||||
}
|
||||
default:
|
||||
LOG_ERROR(HW_GPU, "Unknown color combiner operation {}", (int)op);
|
||||
UNIMPLEMENTED();
|
||||
return {0, 0, 0};
|
||||
}
|
||||
};
|
||||
|
||||
u8 AlphaCombine(TevStageConfig::Operation op, const std::array<u8, 3>& input) {
|
||||
switch (op) {
|
||||
using Operation = TevStageConfig::Operation;
|
||||
case Operation::Replace:
|
||||
return input[0];
|
||||
|
||||
case Operation::Modulate:
|
||||
return input[0] * input[1] / 255;
|
||||
|
||||
case Operation::Add:
|
||||
return std::min(255, input[0] + input[1]);
|
||||
|
||||
case Operation::AddSigned: {
|
||||
// TODO(bunnei): Verify that the color conversion from (float) 0.5f to (byte) 128 is correct
|
||||
auto result = static_cast<int>(input[0]) + static_cast<int>(input[1]) - 128;
|
||||
return static_cast<u8>(std::clamp<int>(result, 0, 255));
|
||||
}
|
||||
|
||||
case Operation::Lerp:
|
||||
return (input[0] * input[2] + input[1] * (255 - input[2])) / 255;
|
||||
|
||||
case Operation::Subtract:
|
||||
return std::max(0, (int)input[0] - (int)input[1]);
|
||||
|
||||
case Operation::MultiplyThenAdd:
|
||||
return std::min(255, (input[0] * input[1] + 255 * input[2]) / 255);
|
||||
|
||||
case Operation::AddThenMultiply:
|
||||
return (std::min(255, (input[0] + input[1])) * input[2]) / 255;
|
||||
|
||||
default:
|
||||
LOG_ERROR(HW_GPU, "Unknown alpha combiner operation {}", (int)op);
|
||||
UNIMPLEMENTED();
|
||||
return 0;
|
||||
}
|
||||
};
|
||||
|
||||
} // namespace Pica::Rasterizer
|
||||
26
src/video_core/renderer_software/sw_texturing.h
Normal file
26
src/video_core/renderer_software/sw_texturing.h
Normal file
@@ -0,0 +1,26 @@
|
||||
// Copyright 2017 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "common/common_types.h"
|
||||
#include "common/vector_math.h"
|
||||
#include "video_core/regs_texturing.h"
|
||||
|
||||
namespace Pica::Rasterizer {
|
||||
|
||||
int GetWrappedTexCoord(TexturingRegs::TextureConfig::WrapMode mode, int val, unsigned size);
|
||||
|
||||
Common::Vec3<u8> GetColorModifier(TexturingRegs::TevStageConfig::ColorModifier factor,
|
||||
const Common::Vec4<u8>& values);
|
||||
|
||||
u8 GetAlphaModifier(TexturingRegs::TevStageConfig::AlphaModifier factor,
|
||||
const Common::Vec4<u8>& values);
|
||||
|
||||
Common::Vec3<u8> ColorCombine(TexturingRegs::TevStageConfig::Operation op,
|
||||
const Common::Vec3<u8> input[3]);
|
||||
|
||||
u8 AlphaCombine(TexturingRegs::TevStageConfig::Operation op, const std::array<u8, 3>& input);
|
||||
|
||||
} // namespace Pica::Rasterizer
|
||||
Reference in New Issue
Block a user