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Shader depal: Don't generate a big switch in the shader, generate specialized shaders instead.

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This commit is contained in:
Henrik Rydgård
2026-06-10 12:22:11 +02:00
parent 8faf6d9a3d
commit 83d82dcf66
8 changed files with 88 additions and 69 deletions
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Common/GPU/ShaderWriter.cpp
-1
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@@ -9,7 +9,6 @@
const char * const vulkan_glsl_preamble_fs =
"#extension GL_ARB_separate_shader_objects : enable\n"
"#extension GL_ARB_shading_language_420pack : enable\n"
"#extension GL_ARB_conservative_depth : enable\n"
"#extension GL_ARB_shader_image_load_store : enable\n"
"#define splat3(x) vec3(x)\n"
"#define DISCARD discard\n"
GPU/Common/FragmentShaderGenerator.cpp
+63 -56
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@@ -70,6 +70,8 @@ bool GenerateFragmentShader(const FShaderID &id, char *buffer, const ShaderLangu
bool texture3D = id.Bit(FS_BIT_3D_TEXTURE);
bool arrayTexture = id.Bit(FS_BIT_SAMPLE_ARRAY_TEXTURE);
bool forceDepthWritesOff = id.Bit(FS_BIT_DEPTH_TEST_NEVER);
bool useDiscardStencilBugWorkaround = id.Bit(FS_BIT_NO_DEPTH_CANNOT_DISCARD_STENCIL) && !forceDepthWritesOff;
ReplaceAlphaType stencilToAlpha = static_cast<ReplaceAlphaType>(id.Bits(FS_BIT_STENCIL_TO_ALPHA, 2));
@@ -87,6 +89,10 @@ bool GenerateFragmentShader(const FShaderID &id, char *buffer, const ShaderLangu
if (gl_extensions.OES_texture_3D && texture3D) {
extensions.push_back("#extension GL_OES_texture_3D: enable");
}
if (useDiscardStencilBugWorkaround) {
// The only use of layout (depth_...)
extensions.push_back("#extension GL_ARB_conservative_depth : enable\n");
}
}
ShaderWriterFlags flags = ShaderWriterFlags::NONE;
@@ -129,6 +135,7 @@ bool GenerateFragmentShader(const FShaderID &id, char *buffer, const ShaderLangu
}
ShaderDepalMode shaderDepalMode = (ShaderDepalMode)id.Bits(FS_BIT_SHADER_DEPAL_MODE, 2);
GEBufferFormat shaderDepalFmt = (GEBufferFormat)(id.Bits(FS_BIT_SHADER_DEPAL_FORMAT, 3));
if (texture3D) {
shaderDepalMode = ShaderDepalMode::OFF;
}
@@ -159,9 +166,6 @@ bool GenerateFragmentShader(const FShaderID &id, char *buffer, const ShaderLangu
shading = doFlatShading ? "flat" : "";
}
bool forceDepthWritesOff = id.Bit(FS_BIT_DEPTH_TEST_NEVER);
bool useDiscardStencilBugWorkaround = id.Bit(FS_BIT_NO_DEPTH_CANNOT_DISCARD_STENCIL) && !forceDepthWritesOff;
GEBlendSrcFactor replaceBlendFuncA = (GEBlendSrcFactor)id.Bits(FS_BIT_BLENDFUNC_A, 4);
GEBlendDstFactor replaceBlendFuncB = (GEBlendDstFactor)id.Bits(FS_BIT_BLENDFUNC_B, 4);
@@ -689,74 +693,77 @@ bool GenerateFragmentShader(const FShaderID &id, char *buffer, const ShaderLangu
WRITE(p, " } else {\n");
WRITE(p, " uv_round = uv;\n");
WRITE(p, " }\n");
p.C(" highp vec4 t = ").SampleTexture2D("tex", "uv_round").C(";\n");
p.C(" highp vec4 t1 = ").SampleTexture2DOffset("tex", "uv_round", 1, 0).C(";\n");
p.C(" highp vec4 t2 = ").SampleTexture2DOffset("tex", "uv_round", 0, 1).C(";\n");
p.C(" highp vec4 t3 = ").SampleTexture2DOffset("tex", "uv_round", 1, 1).C(";\n");
WRITE(p, " uint depalMask = (u_depal_mask_shift_off_fmt & 0xFFu);\n");
WRITE(p, " uint depalShift = (u_depal_mask_shift_off_fmt >> 0x8u) & 0xFFu;\n");
WRITE(p, " uint depalOffset = ((u_depal_mask_shift_off_fmt >> 0x10u) & 0xFFu) << 0x4u;\n");
WRITE(p, " uint depalFmt = (u_depal_mask_shift_off_fmt >> 0x18u) & 0x3u;\n");
WRITE(p, " uvec4 col; uint index0; uint index1; uint index2; uint index3;\n");
WRITE(p, " switch (int(depalFmt)) {\n"); // We might want to include fmt in the shader ID if this is a performance issue.
WRITE(p, " case 0:\n"); // 565
WRITE(p, " col = uvec4(t.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index0 = (col.b << 0xBu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index1 = (col.b << 0xBu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index2 = (col.b << 0xBu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index3 = (col.b << 0xBu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " }\n");
WRITE(p, " break;\n");
WRITE(p, " case 1:\n"); // 5551
WRITE(p, " col = uvec4(t.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index0 = (col.a << 0xFu) | (col.b << 0xAu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index1 = (col.a << 0xFu) | (col.b << 0xAu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index2 = (col.a << 0xFu) | (col.b << 0xAu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index3 = (col.a << 0xFu) | (col.b << 0xAu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " }\n");
WRITE(p, " break;\n");
WRITE(p, " case 2:\n"); // 4444
WRITE(p, " col = uvec4(t.rgba * 15.99);\n");
WRITE(p, " index0 = (col.a << 0xCu) | (col.b << 0x8u) | (col.g << 0x4u) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgba * 15.99);\n");
WRITE(p, " index1 = (col.a << 0xCu) | (col.b << 0x8u) | (col.g << 0x4u) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgba * 15.99);\n");
WRITE(p, " index2 = (col.a << 0xCu) | (col.b << 0x8u) | (col.g << 0x4u) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgba * 15.99);\n");
WRITE(p, " index3 = (col.a << 0xCu) | (col.b << 0x8u) | (col.g << 0x4u) | (col.r);\n");
WRITE(p, " }\n");
WRITE(p, " break;\n");
WRITE(p, " case 3:\n"); // 8888
WRITE(p, " col = uvec4(t.rgba * 255.99);\n");
WRITE(p, " index0 = (col.a << 0x18u) | (col.b << 0x10u) | (col.g << 0x8u) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgba * 255.99);\n");
WRITE(p, " index1 = (col.a << 0x18u) | (col.b << 0x10u) | (col.g << 0x8u) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgba * 255.99);\n");
WRITE(p, " index2 = (col.a << 0x18u) | (col.b << 0x10u) | (col.g << 0x8u) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgba * 255.99);\n");
WRITE(p, " index3 = (col.a << 0x18u) | (col.b << 0x10u) | (col.g << 0x8u) | (col.r);\n");
WRITE(p, " }\n");
WRITE(p, " break;\n");
WRITE(p, " };\n");
switch (shaderDepalFmt) {
case GE_FORMAT_565:
WRITE(p, " col = uvec4(t.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index0 = (col.b << 0xBu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index1 = (col.b << 0xBu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index2 = (col.b << 0xBu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgb * vec3(31.99, 63.99, 31.99), 0);\n");
WRITE(p, " index3 = (col.b << 0xBu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " }\n");
break;
case GE_FORMAT_5551:
WRITE(p, " col = uvec4(t.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index0 = (col.a << 0xFu) | (col.b << 0xAu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index1 = (col.a << 0xFu) | (col.b << 0xAu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index2 = (col.a << 0xFu) | (col.b << 0xAu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgba * vec4(31.99, 31.99, 31.99, 1.0));\n");
WRITE(p, " index3 = (col.a << 0xFu) | (col.b << 0xAu) | (col.g << 0x5u) | (col.r);\n");
WRITE(p, " }\n");
break;
case GE_FORMAT_4444:
WRITE(p, " col = uvec4(t.rgba * 15.99);\n");
WRITE(p, " index0 = (col.a << 0xCu) | (col.b << 0x8u) | (col.g << 0x4u) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgba * 15.99);\n");
WRITE(p, " index1 = (col.a << 0xCu) | (col.b << 0x8u) | (col.g << 0x4u) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgba * 15.99);\n");
WRITE(p, " index2 = (col.a << 0xCu) | (col.b << 0x8u) | (col.g << 0x4u) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgba * 15.99);\n");
WRITE(p, " index3 = (col.a << 0xCu) | (col.b << 0x8u) | (col.g << 0x4u) | (col.r);\n");
WRITE(p, " }\n");
break;
case GE_FORMAT_8888:
WRITE(p, " col = uvec4(t.rgba * 255.99);\n");
WRITE(p, " index0 = (col.a << 0x18u) | (col.b << 0x10u) | (col.g << 0x8u) | (col.r);\n");
WRITE(p, " if (bilinear) {\n");
WRITE(p, " col = uvec4(t1.rgba * 255.99);\n");
WRITE(p, " index1 = (col.a << 0x18u) | (col.b << 0x10u) | (col.g << 0x8u) | (col.r);\n");
WRITE(p, " col = uvec4(t2.rgba * 255.99);\n");
WRITE(p, " index2 = (col.a << 0x18u) | (col.b << 0x10u) | (col.g << 0x8u) | (col.r);\n");
WRITE(p, " col = uvec4(t3.rgba * 255.99);\n");
WRITE(p, " index3 = (col.a << 0x18u) | (col.b << 0x10u) | (col.g << 0x8u) | (col.r);\n");
WRITE(p, " }\n");
break;
}
WRITE(p, " index0 = ((index0 >> depalShift) & depalMask) | depalOffset;\n");
p.C(" t = ").LoadTexture2D("pal", "ivec2(index0, 0)", 0).C(";\n");
WRITE(p, " if (bilinear && !(index0 == index1 && index1 == index2 && index2 == index3)) {\n");
WRITE(p, " index1 = ((index1 >> depalShift) & depalMask) | depalOffset;\n");
WRITE(p, " index2 = ((index2 >> depalShift) & depalMask) | depalOffset;\n");
WRITE(p, " index3 = ((index3 >> depalShift) & depalMask) | depalOffset;\n");
p.C(" t1 = ").LoadTexture2D("pal", "ivec2(index1, 0)", 0).C(";\n");
p.C(" t2 = ").LoadTexture2D("pal", "ivec2(index2, 0)", 0).C(";\n");
p.C(" t3 = ").LoadTexture2D("pal", "ivec2(index3, 0)", 0).C(";\n");
p.C(" t1 = ").LoadTexture2D("pal", "ivec2(index1, 0)", 0).C(";\n");
p.C(" t2 = ").LoadTexture2D("pal", "ivec2(index2, 0)", 0).C(";\n");
p.C(" t3 = ").LoadTexture2D("pal", "ivec2(index3, 0)", 0).C(";\n");
WRITE(p, " t = mix(t, t1, fraction.x);\n");
WRITE(p, " t2 = mix(t2, t3, fraction.x);\n");
WRITE(p, " t = mix(t, t2, fraction.y);\n");
GPU/Common/ShaderId.cpp
+19 -6
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@@ -202,12 +202,6 @@ std::string FragmentShaderDesc(const FShaderID &id) {
if (id.Bit(FS_BIT_FLATSHADE)) desc << "Flat ";
if (id.Bit(FS_BIT_BGRA_TEXTURE)) desc << "BGRA ";
if (id.Bit(FS_BIT_DEPTH_TEST_NEVER)) desc << "DepthNever ";
switch ((ShaderDepalMode)id.Bits(FS_BIT_SHADER_DEPAL_MODE, 2)) {
case ShaderDepalMode::OFF: break;
case ShaderDepalMode::NORMAL: desc << "Depal "; break;
case ShaderDepalMode::SMOOTHED: desc << "SmoothDepal "; break;
case ShaderDepalMode::CLUT8_8888: desc << "CLUT8From8888Depal"; break;
}
if (id.Bit(FS_BIT_COLOR_WRITEMASK)) desc << "WriteMask ";
if (id.Bit(FS_BIT_SHADER_TEX_CLAMP)) {
desc << "TClamp";
@@ -275,6 +269,20 @@ std::string FragmentShaderDesc(const FShaderID &id) {
if (id.Bit(FS_BIT_USE_FRAMEBUFFER_FETCH)) desc << "(fetch)";
if (id.Bit(FS_BIT_MINMAX_DISCARD)) desc << "FragMinMaxDiscard ";
if (id.Bit(FS_BIT_DEPTH_CLAMP)) desc << "FragDepthClamp ";
const ShaderDepalMode depalMode = (ShaderDepalMode)id.Bits(FS_BIT_SHADER_DEPAL_MODE, 2);
switch (depalMode) {
case ShaderDepalMode::OFF: break;
case ShaderDepalMode::NORMAL: desc << "Depal(";
{
const GEBufferFormat shaderDepalFormat = (GEBufferFormat)id.Bits(FS_BIT_SHADER_DEPAL_FORMAT, 3);
desc << GeBufferFormatToString(shaderDepalFormat) << ") ";
break;
}
case ShaderDepalMode::SMOOTHED: desc << "SmoothDepal "; break;
case ShaderDepalMode::CLUT8_8888: desc << "CLUT8From8888Depal"; break;
}
return desc.str();
}
@@ -324,6 +332,10 @@ void ComputeFragmentShaderID(FShaderID *id_out, const ComputedPipelineState &pip
bool enableTexAlpha = gstate.isTextureAlphaUsed();
ShaderDepalMode shaderDepalMode = gstate_c.shaderDepalMode;
GEBufferFormat shaderDepalFormat = {};
if (shaderDepalMode == ShaderDepalMode::NORMAL) {
shaderDepalFormat = gstate_c.depalTextureFormat;
}
bool colorWriteMask = pipelineState.maskState.applyFramebufferRead;
ReplaceBlendType replaceBlend = pipelineState.blendState.replaceBlend;
@@ -343,6 +355,7 @@ void ComputeFragmentShaderID(FShaderID *id_out, const ComputedPipelineState &pip
}
id.SetBit(FS_BIT_BGRA_TEXTURE, gstate_c.bgraTexture);
id.SetBits(FS_BIT_SHADER_DEPAL_MODE, 2, (int)shaderDepalMode);
id.SetBits(FS_BIT_SHADER_DEPAL_FORMAT, 3, (int)shaderDepalFormat);
id.SetBit(FS_BIT_3D_TEXTURE, gstate_c.curTextureIs3D);
}
GPU/Common/ShaderId.h
+1 -1
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@@ -88,7 +88,7 @@ enum FShaderBit : uint8_t {
FS_BIT_SHADER_TEX_CLAMP = 5,
FS_BIT_CLAMP_S = 6,
FS_BIT_CLAMP_T = 7,
// Free bits: 8-11
FS_BIT_SHADER_DEPAL_FORMAT = 8, // 3 bits (GEBufferFormat), connected to FS_BIT_SHADER_DEPAL_MODE
FS_BIT_ALPHA_TEST = 12,
FS_BIT_ALPHA_TEST_FUNC = 13, // 3 bits
FS_BIT_ALPHA_AGAINST_ZERO = 16,
GPU/Common/ShaderUniforms.cpp
+1 -1
View File
@@ -191,7 +191,7 @@ void BaseUpdateUniforms(UB_VS_FS_Base *ub, uint64_t dirtyUniforms, bool useBuffe
int indexMask = gstate.getClutIndexMask();
int indexShift = gstate.getClutIndexShift();
int indexOffset = gstate.getClutIndexStartPos() >> 4;
int format = gstate_c.depalFramebufferFormat;
int format = gstate_c.depalTextureFormat;
uint32_t val = BytesToUint32(indexMask, indexShift, indexOffset, format);
// Poke in a bilinear filter flag in the top bit.
if (gstate.isMagnifyFilteringEnabled())
GPU/Common/TextureCacheCommon.cpp
+2 -2
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@@ -2319,9 +2319,9 @@ void TextureCacheCommon::ApplyTextureFramebuffer(VirtualFramebuffer *framebuffer
mode = ShaderDepalMode::SMOOTHED;
}
gstate_c.Dirty(DIRTY_DEPAL);
gstate_c.Dirty(DIRTY_DEPAL | DIRTY_FRAGMENTSHADER_STATE);
gstate_c.SetUseShaderDepal(mode);
gstate_c.depalFramebufferFormat = framebuffer->fb_format;
gstate_c.depalTextureFormat = framebuffer->fb_format;
const u32 bytesPerColor = clutFormat == GE_CMODE_32BIT_ABGR8888 ? sizeof(u32) : sizeof(u16);
const u32 clutTotalColors = clutMaxBytes_ / bytesPerColor;
GPU/GLES/ShaderManagerGLES.cpp
+1 -1
View File
@@ -377,7 +377,7 @@ void LinkedShader::UpdateUniforms(const ShaderID &vsid, const ShaderLanguageDesc
int indexMask = gstate.getClutIndexMask();
int indexShift = gstate.getClutIndexShift();
int indexOffset = gstate.getClutIndexStartPos() >> 4;
int format = gstate_c.depalFramebufferFormat;
int format = gstate_c.depalTextureFormat;
uint32_t val = BytesToUint32(indexMask, indexShift, indexOffset, format);
// Poke in a bilinear filter flag in the top bit.
val |= gstate.isMagnifyFilteringEnabled() << 31;
GPU/GPUState.h
+1 -1
View File
@@ -700,7 +700,7 @@ public:
int spline_num_points_u;
ShaderDepalMode shaderDepalMode;
GEBufferFormat depalFramebufferFormat;
GEBufferFormat depalTextureFormat;
u32 getRelativeAddress(u32 data) const {
u32 baseExtended = ((gstate.base & 0x000F0000) << 8) | data;