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dolphin/Source/Core/VideoCommon/UberShaderPixel.cpp

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// Copyright 2015 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "VideoCommon/UberShaderPixel.h"
#include "VideoCommon/BPMemory.h"
#include "VideoCommon/DriverDetails.h"
#include "VideoCommon/NativeVertexFormat.h"
#include "VideoCommon/PixelShaderGen.h"
#include "VideoCommon/ShaderGenCommon.h"
#include "VideoCommon/UberShaderCommon.h"
#include "VideoCommon/VideoCommon.h"
#include "VideoCommon/VideoConfig.h"
#include "VideoCommon/XFMemory.h"
namespace UberShader
{
PixelShaderUid GetPixelShaderUid()
{
PixelShaderUid out;
pixel_ubershader_uid_data* const uid_data = out.GetUidData();
uid_data->num_texgens = xfmem.numTexGen.numTexGens;
uid_data->early_depth = bpmem.UseEarlyDepthTest() &&
(g_ActiveConfig.bFastDepthCalc ||
bpmem.alpha_test.TestResult() == AlphaTestResult::Undetermined) &&
!(bpmem.zmode.testenable && bpmem.genMode.zfreeze);
uid_data->per_pixel_depth =
(bpmem.ztex2.op != ZTexOp::Disabled && bpmem.UseLateDepthTest()) ||
(!g_ActiveConfig.bFastDepthCalc && bpmem.zmode.testenable && !uid_data->early_depth) ||
(bpmem.zmode.testenable && bpmem.genMode.zfreeze);
uid_data->uint_output = bpmem.blendmode.UseLogicOp();
return out;
}
void ClearUnusedPixelShaderUidBits(APIType ApiType, const ShaderHostConfig& host_config,
PixelShaderUid* uid)
{
pixel_ubershader_uid_data* const uid_data = uid->GetUidData();
// OpenGL and Vulkan convert implicitly normalized color outputs to their uint representation.
// Therefore, it is not necessary to use a uint output on these backends. We also disable the
// uint output when logic op is not supported (i.e. driver/device does not support D3D11.1).
if (ApiType != APIType::D3D || !host_config.backend_logic_op)
uid_data->uint_output = 0;
}
ShaderCode GenPixelShader(APIType ApiType, const ShaderHostConfig& host_config,
const pixel_ubershader_uid_data* uid_data)
{
const bool per_pixel_lighting = host_config.per_pixel_lighting;
const bool msaa = host_config.msaa;
const bool ssaa = host_config.ssaa;
const bool stereo = host_config.stereo;
const bool use_dual_source = host_config.backend_dual_source_blend;
const bool use_shader_blend = !use_dual_source && host_config.backend_shader_framebuffer_fetch;
const bool early_depth = uid_data->early_depth != 0;
const bool per_pixel_depth = uid_data->per_pixel_depth != 0;
const bool bounding_box = host_config.bounding_box;
const u32 numTexgen = uid_data->num_texgens;
ShaderCode out;
out.Write("// Pixel UberShader for {} texgens{}{}\n", numTexgen,
early_depth ? ", early-depth" : "", per_pixel_depth ? ", per-pixel depth" : "");
WritePixelShaderCommonHeader(out, ApiType, host_config, bounding_box);
WriteUberShaderCommonHeader(out, ApiType, host_config);
if (per_pixel_lighting)
WriteLightingFunction(out);
// Shader inputs/outputs in GLSL (HLSL is in main).
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
{
if (use_dual_source)
{
if (DriverDetails::HasBug(DriverDetails::BUG_BROKEN_FRAGMENT_SHADER_INDEX_DECORATION))
{
out.Write("FRAGMENT_OUTPUT_LOCATION(0) out vec4 ocol0;\n"
"FRAGMENT_OUTPUT_LOCATION(1) out vec4 ocol1;\n");
}
else
{
out.Write("FRAGMENT_OUTPUT_LOCATION_INDEXED(0, 0) out vec4 ocol0;\n"
"FRAGMENT_OUTPUT_LOCATION_INDEXED(0, 1) out vec4 ocol1;\n");
}
}
else if (use_shader_blend)
{
// QComm's Adreno driver doesn't seem to like using the framebuffer_fetch value as an
// intermediate value with multiple reads & modifications, so pull out the "real" output value
// and use a temporary for calculations, then set the output value once at the end of the
// shader
if (DriverDetails::HasBug(DriverDetails::BUG_BROKEN_FRAGMENT_SHADER_INDEX_DECORATION))
{
out.Write("FRAGMENT_OUTPUT_LOCATION(0) FRAGMENT_INOUT vec4 real_ocol0;\n");
}
else
{
out.Write("FRAGMENT_OUTPUT_LOCATION_INDEXED(0, 0) FRAGMENT_INOUT vec4 real_ocol0;\n");
}
}
else
{
out.Write("FRAGMENT_OUTPUT_LOCATION(0) out vec4 ocol0;\n");
}
if (per_pixel_depth)
out.Write("#define depth gl_FragDepth\n");
if (host_config.backend_geometry_shaders)
{
out.Write("VARYING_LOCATION(0) in VertexData {{\n");
GenerateVSOutputMembers(out, ApiType, numTexgen, host_config,
GetInterpolationQualifier(msaa, ssaa, true, true));
if (stereo)
out.Write(" flat int layer;\n");
out.Write("}};\n\n");
}
else
{
// Let's set up attributes
u32 counter = 0;
out.Write("VARYING_LOCATION({}) {} in float4 colors_0;\n", counter++,
GetInterpolationQualifier(msaa, ssaa));
out.Write("VARYING_LOCATION({}) {} in float4 colors_1;\n", counter++,
GetInterpolationQualifier(msaa, ssaa));
for (u32 i = 0; i < numTexgen; ++i)
{
out.Write("VARYING_LOCATION({}) {} in float3 tex{};\n", counter++,
GetInterpolationQualifier(msaa, ssaa), i);
}
if (!host_config.fast_depth_calc)
{
out.Write("VARYING_LOCATION({}) {} in float4 clipPos;\n", counter++,
GetInterpolationQualifier(msaa, ssaa));
}
if (per_pixel_lighting)
{
out.Write("VARYING_LOCATION({}) {} in float3 Normal;\n", counter++,
GetInterpolationQualifier(msaa, ssaa));
out.Write("VARYING_LOCATION({}) {} in float3 WorldPos;\n", counter++,
GetInterpolationQualifier(msaa, ssaa));
}
}
}
// Uniform index -> texture coordinates
// Quirk: when the tex coord is not less than the number of tex gens (i.e. the tex coord does
// not exist), then tex coord 0 is used (though sometimes glitchy effects happen on console).
// This affects the Mario portrait in Luigi's Mansion, where the developers forgot to set
// the number of tex gens to 2 (bug 11462).
if (numTexgen > 0)
{
out.Write("int2 selectTexCoord(uint index");
for (u32 i = 0; i < numTexgen; i++)
out.Write(", int2 fixpoint_uv{}", i);
out.Write(") {{\n");
if (ApiType == APIType::D3D)
{
out.Write(" switch (index) {{\n");
for (u32 i = 0; i < numTexgen; i++)
{
out.Write(" case {}u:\n"
" return fixpoint_uv{};\n",
i, i);
}
out.Write(" default:\n"
" return fixpoint_uv0;\n"
" }}\n");
}
else
{
out.Write(" if (index >= {}u) {{\n", numTexgen);
out.Write(" return fixpoint_uv0;\n"
" }}\n");
if (numTexgen > 4)
out.Write(" if (index < 4u) {{\n");
if (numTexgen > 2)
out.Write(" if (index < 2u) {{\n");
if (numTexgen > 1)
out.Write(" return (index == 0u) ? fixpoint_uv0 : fixpoint_uv1;\n");
else
out.Write(" return fixpoint_uv0;\n");
if (numTexgen > 2)
{
out.Write(" }} else {{\n"); // >= 2 < min(4, numTexgen)
if (numTexgen > 3)
out.Write(" return (index == 2u) ? fixpoint_uv2 : fixpoint_uv3;\n");
else
out.Write(" return fixpoint_uv2;\n");
out.Write(" }}\n");
}
if (numTexgen > 4)
{
out.Write(" }} else {{\n"); // >= 4 < min(8, numTexgen)
if (numTexgen > 6)
out.Write(" if (index < 6u) {{\n");
if (numTexgen > 5)
out.Write(" return (index == 4u) ? fixpoint_uv4 : fixpoint_uv5;\n");
else
out.Write(" return fixpoint_uv4;\n");
if (numTexgen > 6)
{
out.Write(" }} else {{\n"); // >= 6 < min(8, numTexgen)
if (numTexgen > 7)
out.Write(" return (index == 6u) ? fixpoint_uv6 : fixpoint_uv7;\n");
else
out.Write(" return fixpoint_uv6;\n");
out.Write(" }}\n");
}
out.Write(" }}\n");
}
}
out.Write("}}\n\n");
}
// =====================
// Texture Sampling
// =====================
if (host_config.backend_dynamic_sampler_indexing)
{
// Doesn't look like DirectX supports this. Oh well the code path is here just in case it
// supports this in the future.
out.Write("int4 sampleTexture(uint sampler_num, float3 uv) {{\n");
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
out.Write(" return iround(texture(samp[sampler_num], uv) * 255.0);\n");
else if (ApiType == APIType::D3D)
out.Write(" return iround(Tex[sampler_num].Sample(samp[sampler_num], uv) * 255.0);\n");
out.Write("}}\n\n");
}
else
{
out.Write("int4 sampleTexture(uint sampler_num, float3 uv) {{\n"
" // This is messy, but DirectX, OpenGL 3.3 and OpenGL ES 3.0 doesn't support "
"dynamic indexing of the sampler array\n"
" // With any luck the shader compiler will optimise this if the hardware supports "
"dynamic indexing.\n"
" switch(sampler_num) {{\n");
for (int i = 0; i < 8; i++)
{
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
out.Write(" case {}u: return iround(texture(samp[{}], uv) * 255.0);\n", i, i);
else if (ApiType == APIType::D3D)
out.Write(" case {}u: return iround(Tex[{}].Sample(samp[{}], uv) * 255.0);\n", i, i, i);
}
out.Write(" }}\n"
"}}\n\n");
}
// ======================
// Arbitrary Swizzling
// ======================
out.Write("int4 Swizzle(uint s, int4 color) {{\n"
" // AKA: Color Channel Swapping\n"
"\n"
" int4 ret;\n");
out.Write(" ret.r = color[{}];\n", BitfieldExtract<&TevKSel::swap1>("bpmem_tevksel(s * 2u)"));
out.Write(" ret.g = color[{}];\n", BitfieldExtract<&TevKSel::swap2>("bpmem_tevksel(s * 2u)"));
out.Write(" ret.b = color[{}];\n",
BitfieldExtract<&TevKSel::swap1>("bpmem_tevksel(s * 2u + 1u)"));
out.Write(" ret.a = color[{}];\n",
BitfieldExtract<&TevKSel::swap2>("bpmem_tevksel(s * 2u + 1u)"));
out.Write(" return ret;\n"
"}}\n\n");
// ======================
// Indirect Wrapping
// ======================
out.Write("int Wrap(int coord, uint mode) {{\n"
" if (mode == 0u) // ITW_OFF\n"
" return coord;\n"
" else if (mode < 6u) // ITW_256 to ITW_16\n"
" return coord & (0xfffe >> mode);\n"
" else // ITW_0\n"
" return 0;\n"
"}}\n\n");
// ======================
// Indirect Lookup
// ======================
const auto LookupIndirectTexture = [&out, stereo](std::string_view out_var_name,
std::string_view in_index_name) {
// in_index_name is the indirect stage, not the tev stage
// bpmem_iref is packed differently from RAS1_IREF
// This function assumes bpmem_iref is nonzero (i.e. matrix is not off, and the
// indirect texture stage is enabled).
out.Write("{{\n"
" uint iref = bpmem_iref({});\n"
" uint texcoord = bitfieldExtract(iref, 0, 3);\n"
" uint texmap = bitfieldExtract(iref, 8, 3);\n"
" int2 fixedPoint_uv = getTexCoord(texcoord);\n"
"\n"
" if (({} & 1u) == 0u)\n"
" fixedPoint_uv = fixedPoint_uv >> " I_INDTEXSCALE "[{} >> 1].xy;\n"
" else\n"
" fixedPoint_uv = fixedPoint_uv >> " I_INDTEXSCALE "[{} >> 1].zw;\n"
"\n"
" {} = sampleTexture(texmap, float3(float2(fixedPoint_uv) * " I_TEXDIMS
"[texmap].xy, {})).abg;\n"
"}}",
in_index_name, in_index_name, in_index_name, in_index_name, out_var_name,
stereo ? "float(layer)" : "0.0");
};
// ======================
// TEV's Special Lerp
// ======================
const auto WriteTevLerp = [&out](std::string_view components) {
out.Write(
"// TEV's Linear Interpolate, plus bias, add/subtract and scale\n"
"int{0} tevLerp{0}(int{0} A, int{0} B, int{0} C, int{0} D, uint bias, bool op, bool alpha, "
"uint shift) {{\n"
" // Scale C from 0..255 to 0..256\n"
" C += C >> 7;\n"
"\n"
" // Add bias to D\n"
" if (bias == 1u) D += 128;\n"
" else if (bias == 2u) D -= 128;\n"
"\n"
" int{0} lerp = (A << 8) + (B - A)*C;\n"
" if (shift != 3u) {{\n"
" lerp = lerp << shift;\n"
" D = D << shift;\n"
" }}\n"
"\n"
" if ((shift == 3u) == alpha)\n"
" lerp = lerp + (op ? 127 : 128);\n"
"\n"
" int{0} result = lerp >> 8;\n"
"\n"
" // Add/Subtract D\n"
" if (op) // Subtract\n"
" result = D - result;\n"
" else // Add\n"
" result = D + result;\n"
"\n"
" // Most of the Shift was moved inside the lerp for improved precision\n"
" // But we still do the divide by 2 here\n"
" if (shift == 3u)\n"
" result = result >> 1;\n"
" return result;\n"
"}}\n\n",
components);
};
WriteTevLerp(""); // int
WriteTevLerp("3"); // int3
// =======================
// TEV's Color Compare
// =======================
out.Write(
"// Implements operations 0-5 of TEV's compare mode,\n"
"// which are common to both color and alpha channels\n"
"bool tevCompare(uint op, int3 color_A, int3 color_B) {{\n"
" switch (op) {{\n"
" case 0u: // TevCompareMode::R8, TevComparison::GT\n"
" return (color_A.r > color_B.r);\n"
" case 1u: // TevCompareMode::R8, TevComparison::EQ\n"
" return (color_A.r == color_B.r);\n"
" case 2u: // TevCompareMode::GR16, TevComparison::GT\n"
" int A_16 = (color_A.r | (color_A.g << 8));\n"
" int B_16 = (color_B.r | (color_B.g << 8));\n"
" return A_16 > B_16;\n"
" case 3u: // TevCompareMode::GR16, TevComparison::EQ\n"
" return (color_A.r == color_B.r && color_A.g == color_B.g);\n"
" case 4u: // TevCompareMode::BGR24, TevComparison::GT\n"
" int A_24 = (color_A.r | (color_A.g << 8) | (color_A.b << 16));\n"
" int B_24 = (color_B.r | (color_B.g << 8) | (color_B.b << 16));\n"
" return A_24 > B_24;\n"
" case 5u: // TevCompareMode::BGR24, TevComparison::EQ\n"
" return (color_A.r == color_B.r && color_A.g == color_B.g && color_A.b == color_B.b);\n"
" default:\n"
" return false;\n"
" }}\n"
"}}\n\n");
// =================
// Input Selects
// =================
out.Write("struct State {{\n"
" int4 Reg[4];\n"
" int4 TexColor;\n"
" int AlphaBump;\n"
"}};\n"
"struct StageState {{\n"
" uint stage;\n"
" uint order;\n"
" uint cc;\n"
" uint ac;\n"
"}};\n"
"\n"
"int4 getRasColor(State s, StageState ss, float4 colors_0, float4 colors_1);\n"
"int4 getKonstColor(State s, StageState ss);\n"
"\n");
// The switch statements in these functions appear to get transformed into an if..else chain
// on NVIDIA's OpenGL/Vulkan drivers, resulting in lower performance than the D3D counterparts.
// Transforming the switch into a binary tree of ifs can increase performance by up to 20%.
if (ApiType == APIType::D3D)
{
out.Write("// Helper function for Alpha Test\n"
"bool alphaCompare(int a, int b, uint compare) {{\n"
" switch (compare) {{\n"
" case 0u: // NEVER\n"
" return false;\n"
" case 1u: // LESS\n"
" return a < b;\n"
" case 2u: // EQUAL\n"
" return a == b;\n"
" case 3u: // LEQUAL\n"
" return a <= b;\n"
" case 4u: // GREATER\n"
" return a > b;\n"
" case 5u: // NEQUAL;\n"
" return a != b;\n"
" case 6u: // GEQUAL\n"
" return a >= b;\n"
" case 7u: // ALWAYS\n"
" return true;\n"
" }}\n"
"}}\n"
"\n"
"int3 selectColorInput(State s, StageState ss, float4 colors_0, float4 colors_1, "
"uint index) {{\n"
" switch (index) {{\n"
" case 0u: // prev.rgb\n"
" return s.Reg[0].rgb;\n"
" case 1u: // prev.aaa\n"
" return s.Reg[0].aaa;\n"
" case 2u: // c0.rgb\n"
" return s.Reg[1].rgb;\n"
" case 3u: // c0.aaa\n"
" return s.Reg[1].aaa;\n"
" case 4u: // c1.rgb\n"
" return s.Reg[2].rgb;\n"
" case 5u: // c1.aaa\n"
" return s.Reg[2].aaa;\n"
" case 6u: // c2.rgb\n"
" return s.Reg[3].rgb;\n"
" case 7u: // c2.aaa\n"
" return s.Reg[3].aaa;\n"
" case 8u:\n"
" return s.TexColor.rgb;\n"
" case 9u:\n"
" return s.TexColor.aaa;\n"
" case 10u:\n"
" return getRasColor(s, ss, colors_0, colors_1).rgb;\n"
" case 11u:\n"
" return getRasColor(s, ss, colors_0, colors_1).aaa;\n"
" case 12u: // One\n"
" return int3(255, 255, 255);\n"
" case 13u: // Half\n"
" return int3(128, 128, 128);\n"
" case 14u:\n"
" return getKonstColor(s, ss).rgb;\n"
" case 15u: // Zero\n"
" return int3(0, 0, 0);\n"
" }}\n"
"}}\n"
"\n"
"int selectAlphaInput(State s, StageState ss, float4 colors_0, float4 colors_1, "
"uint index) {{\n"
" switch (index) {{\n"
" case 0u: // prev.a\n"
" return s.Reg[0].a;\n"
" case 1u: // c0.a\n"
" return s.Reg[1].a;\n"
" case 2u: // c1.a\n"
" return s.Reg[2].a;\n"
" case 3u: // c2.a\n"
" return s.Reg[3].a;\n"
" case 4u:\n"
" return s.TexColor.a;\n"
" case 5u:\n"
" return getRasColor(s, ss, colors_0, colors_1).a;\n"
" case 6u:\n"
" return getKonstColor(s, ss).a;\n"
" case 7u: // Zero\n"
" return 0;\n"
" }}\n"
"}}\n"
"\n"
"int4 getTevReg(in State s, uint index) {{\n"
" switch (index) {{\n"
" case 0u: // prev\n"
" return s.Reg[0];\n"
" case 1u: // c0\n"
" return s.Reg[1];\n"
" case 2u: // c1\n"
" return s.Reg[2];\n"
" case 3u: // c2\n"
" return s.Reg[3];\n"
" default: // prev\n"
" return s.Reg[0];\n"
" }}\n"
"}}\n"
"\n"
"void setRegColor(inout State s, uint index, int3 color) {{\n"
" switch (index) {{\n"
" case 0u: // prev\n"
" s.Reg[0].rgb = color;\n"
" break;\n"
" case 1u: // c0\n"
" s.Reg[1].rgb = color;\n"
" break;\n"
" case 2u: // c1\n"
" s.Reg[2].rgb = color;\n"
" break;\n"
" case 3u: // c2\n"
" s.Reg[3].rgb = color;\n"
" break;\n"
" }}\n"
"}}\n"
"\n"
"void setRegAlpha(inout State s, uint index, int alpha) {{\n"
" switch (index) {{\n"
" case 0u: // prev\n"
" s.Reg[0].a = alpha;\n"
" break;\n"
" case 1u: // c0\n"
" s.Reg[1].a = alpha;\n"
" break;\n"
" case 2u: // c1\n"
" s.Reg[2].a = alpha;\n"
" break;\n"
" case 3u: // c2\n"
" s.Reg[3].a = alpha;\n"
" break;\n"
" }}\n"
"}}\n"
"\n");
}
else
{
out.Write(
"// Helper function for Alpha Test\n"
"bool alphaCompare(int a, int b, uint compare) {{\n"
" if (compare < 4u) {{\n"
" if (compare < 2u) {{\n"
" return (compare == 0u) ? (false) : (a < b);\n"
" }} else {{\n"
" return (compare == 2u) ? (a == b) : (a <= b);\n"
" }}\n"
" }} else {{\n"
" if (compare < 6u) {{\n"
" return (compare == 4u) ? (a > b) : (a != b);\n"
" }} else {{\n"
" return (compare == 6u) ? (a >= b) : (true);\n"
" }}\n"
" }}\n"
"}}\n"
"\n"
"int3 selectColorInput(State s, StageState ss, float4 colors_0, float4 colors_1, "
"uint index) {{\n"
" if (index < 8u) {{\n"
" if (index < 4u) {{\n"
" if (index < 2u) {{\n"
" return (index == 0u) ? s.Reg[0].rgb : s.Reg[0].aaa;\n"
" }} else {{\n"
" return (index == 2u) ? s.Reg[1].rgb : s.Reg[1].aaa;\n"
" }}\n"
" }} else {{\n"
" if (index < 6u) {{\n"
" return (index == 4u) ? s.Reg[2].rgb : s.Reg[2].aaa;\n"
" }} else {{\n"
" return (index == 6u) ? s.Reg[3].rgb : s.Reg[3].aaa;\n"
" }}\n"
" }}\n"
" }} else {{\n"
" if (index < 12u) {{\n"
" if (index < 10u) {{\n"
" return (index == 8u) ? s.TexColor.rgb : s.TexColor.aaa;\n"
" }} else {{\n"
" int4 ras = getRasColor(s, ss, colors_0, colors_1);\n"
" return (index == 10u) ? ras.rgb : ras.aaa;\n"
" }}\n"
" }} else {{\n"
" if (index < 14u) {{\n"
" return (index == 12u) ? int3(255, 255, 255) : int3(128, 128, 128);\n"
" }} else {{\n"
" return (index == 14u) ? getKonstColor(s, ss).rgb : int3(0, 0, 0);\n"
" }}\n"
" }}\n"
" }}\n"
"}}\n"
"\n"
"int selectAlphaInput(State s, StageState ss, float4 colors_0, float4 colors_1, "
"uint index) {{\n"
" if (index < 4u) {{\n"
" if (index < 2u) {{\n"
" return (index == 0u) ? s.Reg[0].a : s.Reg[1].a;\n"
" }} else {{\n"
" return (index == 2u) ? s.Reg[2].a : s.Reg[3].a;\n"
" }}\n"
" }} else {{\n"
" if (index < 6u) {{\n"
" return (index == 4u) ? s.TexColor.a : getRasColor(s, ss, colors_0, colors_1).a;\n"
" }} else {{\n"
" return (index == 6u) ? getKonstColor(s, ss).a : 0;\n"
" }}\n"
" }}\n"
"}}\n"
"\n"
"int4 getTevReg(in State s, uint index) {{\n"
" if (index < 2u) {{\n"
" if (index == 0u) {{\n"
" return s.Reg[0];\n"
" }} else {{\n"
" return s.Reg[1];\n"
" }}\n"
" }} else {{\n"
" if (index == 2u) {{\n"
" return s.Reg[2];\n"
" }} else {{\n"
" return s.Reg[3];\n"
" }}\n"
" }}\n"
"}}\n"
"\n"
"void setRegColor(inout State s, uint index, int3 color) {{\n"
" if (index < 2u) {{\n"
" if (index == 0u) {{\n"
" s.Reg[0].rgb = color;\n"
" }} else {{\n"
" s.Reg[1].rgb = color;\n"
" }}\n"
" }} else {{\n"
" if (index == 2u) {{\n"
" s.Reg[2].rgb = color;\n"
" }} else {{\n"
" s.Reg[3].rgb = color;\n"
" }}\n"
" }}\n"
"}}\n"
"\n"
"void setRegAlpha(inout State s, uint index, int alpha) {{\n"
" if (index < 2u) {{\n"
" if (index == 0u) {{\n"
" s.Reg[0].a = alpha;\n"
" }} else {{\n"
" s.Reg[1].a = alpha;\n"
" }}\n"
" }} else {{\n"
" if (index == 2u) {{\n"
" s.Reg[2].a = alpha;\n"
" }} else {{\n"
" s.Reg[3].a = alpha;\n"
" }}\n"
" }}\n"
"}}\n"
"\n");
}
// Since the fixed-point texture coodinate variables aren't global, we need to pass
// them to the select function. This applies to all backends.
if (numTexgen > 0)
{
out.Write("#define getTexCoord(index) selectTexCoord((index)");
for (u32 i = 0; i < numTexgen; i++)
out.Write(", fixpoint_uv{}", i);
out.Write(")\n\n");
}
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
{
if (early_depth && host_config.backend_early_z)
out.Write("FORCE_EARLY_Z;\n");
out.Write("void main()\n{{\n");
out.Write(" float4 rawpos = gl_FragCoord;\n");
if (use_shader_blend)
{
// Store off a copy of the initial fb value for blending
out.Write(" float4 initial_ocol0 = FB_FETCH_VALUE;\n"
" float4 ocol0;\n"
" float4 ocol1;\n");
}
}
else // D3D
{
if (early_depth && host_config.backend_early_z)
out.Write("[earlydepthstencil]\n");
out.Write("void main(\n");
if (uid_data->uint_output)
{
out.Write(" out uint4 ocol0 : SV_Target,\n");
}
else
{
out.Write(" out float4 ocol0 : SV_Target0,\n"
" out float4 ocol1 : SV_Target1,\n");
}
if (per_pixel_depth)
out.Write(" out float depth : SV_Depth,\n");
out.Write(" in float4 rawpos : SV_Position,\n");
out.Write(" in {} float4 colors_0 : COLOR0,\n", GetInterpolationQualifier(msaa, ssaa));
out.Write(" in {} float4 colors_1 : COLOR1", GetInterpolationQualifier(msaa, ssaa));
// compute window position if needed because binding semantic WPOS is not widely supported
for (u32 i = 0; i < numTexgen; ++i)
{
out.Write(",\n in {} float3 tex{} : TEXCOORD{}", GetInterpolationQualifier(msaa, ssaa), i,
i);
}
if (!host_config.fast_depth_calc)
{
out.Write("\n,\n in {} float4 clipPos : TEXCOORD{}", GetInterpolationQualifier(msaa, ssaa),
numTexgen);
}
if (per_pixel_lighting)
{
out.Write(",\n in {} float3 Normal : TEXCOORD{}", GetInterpolationQualifier(msaa, ssaa),
numTexgen + 1);
out.Write(",\n in {} float3 WorldPos : TEXCOORD{}", GetInterpolationQualifier(msaa, ssaa),
numTexgen + 2);
}
out.Write(",\n in float clipDist0 : SV_ClipDistance0\n"
",\n in float clipDist1 : SV_ClipDistance1\n");
if (stereo)
out.Write(",\n in uint layer : SV_RenderTargetArrayIndex\n");
out.Write("\n ) {{\n");
}
out.Write(" int3 tevcoord = int3(0, 0, 0);\n"
" State s;\n"
" s.TexColor = int4(0, 0, 0, 0);\n"
" s.AlphaBump = 0;\n"
"\n");
for (int i = 0; i < 4; i++)
out.Write(" s.Reg[{}] = " I_COLORS "[{}];\n", i, i);
const char* color_input_prefix = "";
if (per_pixel_lighting)
{
out.Write(" float4 lit_colors_0 = colors_0;\n"
" float4 lit_colors_1 = colors_1;\n"
" float3 lit_normal = normalize(Normal.xyz);\n"
" float3 lit_pos = WorldPos.xyz;\n");
WriteVertexLighting(out, ApiType, "lit_pos", "lit_normal", "colors_0", "colors_1",
"lit_colors_0", "lit_colors_1");
color_input_prefix = "lit_";
}
out.Write(" uint num_stages = {};\n\n",
BitfieldExtract<&GenMode::numtevstages>("bpmem_genmode"));
out.Write(" // Main tev loop\n");
if (ApiType == APIType::D3D)
{
// Tell DirectX we don't want this loop unrolled (it crashes if it tries to)
out.Write(" [loop]\n");
}
out.Write(" for(uint stage = 0u; stage <= num_stages; stage++)\n"
" {{\n"
" StageState ss;\n"
" ss.stage = stage;\n"
" ss.cc = bpmem_combiners(stage).x;\n"
" ss.ac = bpmem_combiners(stage).y;\n"
" ss.order = bpmem_tevorder(stage>>1);\n"
" if ((stage & 1u) == 1u)\n"
" ss.order = ss.order >> {};\n\n",
int(TwoTevStageOrders().enable1.StartBit() - TwoTevStageOrders().enable0.StartBit()));
// Disable texturing when there are no texgens (for now)
if (numTexgen != 0)
{
for (u32 i = 0; i < numTexgen; i++)
{
out.Write(" int2 fixpoint_uv{} = int2(", i);
out.Write("(tex{}.z == 0.0 ? tex{}.xy : tex{}.xy / tex{}.z)", i, i, i, i);
out.Write(" * " I_TEXDIMS "[{}].zw);\n", i);
// TODO: S24 overflows here?
}
out.Write("\n"
" uint tex_coord = {};\n",
BitfieldExtract<&TwoTevStageOrders::texcoord0>("ss.order"));
out.Write(" int2 fixedPoint_uv = getTexCoord(tex_coord);\n"
"\n"
" bool texture_enabled = (ss.order & {}u) != 0u;\n",
1 << TwoTevStageOrders().enable0.StartBit());
out.Write("\n"
" // Indirect textures\n"
" uint tevind = bpmem_tevind(stage);\n"
" if (tevind != 0u)\n"
" {{\n"
" uint bs = {};\n",
BitfieldExtract<&TevStageIndirect::bs>("tevind"));
out.Write(" uint fmt = {};\n", BitfieldExtract<&TevStageIndirect::fmt>("tevind"));
out.Write(" uint bias = {};\n", BitfieldExtract<&TevStageIndirect::bias>("tevind"));
out.Write(" uint bt = {};\n", BitfieldExtract<&TevStageIndirect::bt>("tevind"));
out.Write(" uint matrix_index = {};\n",
BitfieldExtract<&TevStageIndirect::matrix_index>("tevind"));
out.Write(" uint matrix_id = {};\n",
BitfieldExtract<&TevStageIndirect::matrix_id>("tevind"));
out.Write(" int2 indtevtrans = int2(0, 0);\n"
"\n");
// There is always a bit set in bpmem_iref if the data is valid (matrix is not off, and the
// indirect texture stage is enabled). If the matrix is off, the result doesn't matter; if the
// indirect texture stage is disabled, the result is undefined (and produces a glitchy pattern
// on hardware, different from this).
// For the undefined case, we just skip applying the indirect operation, which is close enough.
// Viewtiful Joe hits the undefined case (bug 12525).
// Wrapping and add to previous still apply in this case (and when the stage is disabled).
out.Write(" if (bpmem_iref(bt) != 0u) {{");
out.Write(" int3 indcoord;\n");
LookupIndirectTexture("indcoord", "bt");
out.Write(" if (bs != 0u)\n"
" s.AlphaBump = indcoord[bs - 1u];\n"
" switch(fmt)\n"
" {{\n"
" case {:s}:\n",
IndTexFormat::ITF_8);
out.Write(" indcoord.x = indcoord.x + ((bias & 1u) != 0u ? -128 : 0);\n"
" indcoord.y = indcoord.y + ((bias & 2u) != 0u ? -128 : 0);\n"
" indcoord.z = indcoord.z + ((bias & 4u) != 0u ? -128 : 0);\n"
" s.AlphaBump = s.AlphaBump & 0xf8;\n"
" break;\n"
" case {:s}:\n",
IndTexFormat::ITF_5);
out.Write(" indcoord.x = (indcoord.x >> 3) + ((bias & 1u) != 0u ? 1 : 0);\n"
" indcoord.y = (indcoord.y >> 3) + ((bias & 2u) != 0u ? 1 : 0);\n"
" indcoord.z = (indcoord.z >> 3) + ((bias & 4u) != 0u ? 1 : 0);\n"
" s.AlphaBump = s.AlphaBump << 5;\n"
" break;\n"
" case {:s}:\n",
IndTexFormat::ITF_4);
out.Write(" indcoord.x = (indcoord.x >> 4) + ((bias & 1u) != 0u ? 1 : 0);\n"
" indcoord.y = (indcoord.y >> 4) + ((bias & 2u) != 0u ? 1 : 0);\n"
" indcoord.z = (indcoord.z >> 4) + ((bias & 4u) != 0u ? 1 : 0);\n"
" s.AlphaBump = s.AlphaBump << 4;\n"
" break;\n"
" case {:s}:\n",
IndTexFormat::ITF_3);
out.Write(" indcoord.x = (indcoord.x >> 5) + ((bias & 1u) != 0u ? 1 : 0);\n"
" indcoord.y = (indcoord.y >> 5) + ((bias & 2u) != 0u ? 1 : 0);\n"
" indcoord.z = (indcoord.z >> 5) + ((bias & 4u) != 0u ? 1 : 0);\n"
" s.AlphaBump = s.AlphaBump << 3;\n"
" break;\n"
" }}\n"
"\n"
" // Matrix multiply\n"
" if (matrix_index != 0u)\n"
" {{\n"
" uint mtxidx = 2u * (matrix_index - 1u);\n"
" int shift = " I_INDTEXMTX "[mtxidx].w;\n"
"\n"
" switch (matrix_id)\n"
" {{\n"
" case 0u: // 3x2 S0.10 matrix\n"
" indtevtrans = int2(idot(" I_INDTEXMTX
"[mtxidx].xyz, indcoord), idot(" I_INDTEXMTX "[mtxidx + 1u].xyz, indcoord)) >> 3;\n"
" break;\n"
" case 1u: // S matrix, S17.7 format\n"
" indtevtrans = (fixedPoint_uv * indcoord.xx) >> 8;\n"
" break;\n"
" case 2u: // T matrix, S17.7 format\n"
" indtevtrans = (fixedPoint_uv * indcoord.yy) >> 8;\n"
" break;\n"
" }}\n"
"\n"
" if (shift >= 0)\n"
" indtevtrans = indtevtrans >> shift;\n"
" else\n"
" indtevtrans = indtevtrans << ((-shift) & 31);\n"
" }}\n"
" }}\n"
"\n"
" // Wrapping\n"
" uint sw = {};\n",
BitfieldExtract<&TevStageIndirect::sw>("tevind"));
out.Write(" uint tw = {}; \n", BitfieldExtract<&TevStageIndirect::tw>("tevind"));
out.Write(
" int2 wrapped_coord = int2(Wrap(fixedPoint_uv.x, sw), Wrap(fixedPoint_uv.y, tw));\n"
"\n"
" if ((tevind & {}u) != 0u) // add previous tevcoord\n",
1 << TevStageIndirect().fb_addprev.StartBit());
out.Write(" tevcoord.xy += wrapped_coord + indtevtrans;\n"
" else\n"
" tevcoord.xy = wrapped_coord + indtevtrans;\n"
"\n"
" // Emulate s24 overflows\n"
" tevcoord.xy = (tevcoord.xy << 8) >> 8;\n"
" }}\n"
" else\n"
" {{\n"
" tevcoord.xy = fixedPoint_uv;\n"
" }}\n"
"\n"
" // Sample texture for stage\n"
" if (texture_enabled) {{\n"
" uint sampler_num = {};\n",
BitfieldExtract<&TwoTevStageOrders::texmap0>("ss.order"));
out.Write("\n"
" float2 uv = (float2(tevcoord.xy)) * " I_TEXDIMS "[sampler_num].xy;\n");
out.Write(" int4 color = sampleTexture(sampler_num, float3(uv, {}));\n",
stereo ? "float(layer)" : "0.0");
out.Write(" uint swap = {};\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::tswap>("ss.ac"));
out.Write(" s.TexColor = Swizzle(swap, color);\n");
out.Write(" }} else {{\n"
" // Texture is disabled\n"
" s.TexColor = int4(255, 255, 255, 255);\n"
" }}\n"
"\n");
}
out.Write(" // This is the Meat of TEV\n"
" {{\n"
" // Color Combiner\n");
out.Write(" uint color_a = {};\n",
BitfieldExtract<&TevStageCombiner::ColorCombiner::a>("ss.cc"));
out.Write(" uint color_b = {};\n",
BitfieldExtract<&TevStageCombiner::ColorCombiner::b>("ss.cc"));
out.Write(" uint color_c = {};\n",
BitfieldExtract<&TevStageCombiner::ColorCombiner::c>("ss.cc"));
out.Write(" uint color_d = {};\n",
BitfieldExtract<&TevStageCombiner::ColorCombiner::d>("ss.cc"));
out.Write(" uint color_bias = {};\n",
BitfieldExtract<&TevStageCombiner::ColorCombiner::bias>("ss.cc"));
out.Write(" bool color_op = bool({});\n",
BitfieldExtract<&TevStageCombiner::ColorCombiner::op>("ss.cc"));
out.Write(" bool color_clamp = bool({});\n",
BitfieldExtract<&TevStageCombiner::ColorCombiner::clamp>("ss.cc"));
out.Write(" uint color_shift = {};\n",
BitfieldExtract<&TevStageCombiner::ColorCombiner::scale>("ss.cc"));
out.Write(" uint color_dest = {};\n",
BitfieldExtract<&TevStageCombiner::ColorCombiner::dest>("ss.cc"));
out.Write(
" uint color_compare_op = color_shift << 1 | uint(color_op);\n"
"\n"
" int3 color_A = selectColorInput(s, ss, {0}colors_0, {0}colors_1, color_a) & "
"int3(255, 255, 255);\n"
" int3 color_B = selectColorInput(s, ss, {0}colors_0, {0}colors_1, color_b) & "
"int3(255, 255, 255);\n"
" int3 color_C = selectColorInput(s, ss, {0}colors_0, {0}colors_1, color_c) & "
"int3(255, 255, 255);\n"
" int3 color_D = selectColorInput(s, ss, {0}colors_0, {0}colors_1, color_d); // 10 "
"bits + sign\n"
"\n", // TODO: do we need to sign extend?
color_input_prefix);
out.Write(
" int3 color;\n"
" if (color_bias != 3u) {{ // Normal mode\n"
" color = tevLerp3(color_A, color_B, color_C, color_D, color_bias, color_op, false, "
"color_shift);\n"
" }} else {{ // Compare mode\n"
" // op 6 and 7 do a select per color channel\n"
" if (color_compare_op == 6u) {{\n"
" // TevCompareMode::RGB8, TevComparison::GT\n"
" color.r = (color_A.r > color_B.r) ? color_C.r : 0;\n"
" color.g = (color_A.g > color_B.g) ? color_C.g : 0;\n"
" color.b = (color_A.b > color_B.b) ? color_C.b : 0;\n"
" }} else if (color_compare_op == 7u) {{\n"
" // TevCompareMode::RGB8, TevComparison::EQ\n"
" color.r = (color_A.r == color_B.r) ? color_C.r : 0;\n"
" color.g = (color_A.g == color_B.g) ? color_C.g : 0;\n"
" color.b = (color_A.b == color_B.b) ? color_C.b : 0;\n"
" }} else {{\n"
" // The remaining ops do one compare which selects all 3 channels\n"
" color = tevCompare(color_compare_op, color_A, color_B) ? color_C : int3(0, 0, "
"0);\n"
" }}\n"
" color = color_D + color;\n"
" }}\n"
"\n"
" // Clamp result\n"
" if (color_clamp)\n"
" color = clamp(color, 0, 255);\n"
" else\n"
" color = clamp(color, -1024, 1023);\n"
"\n"
" // Write result to the correct input register of the next stage\n"
" setRegColor(s, color_dest, color);\n"
"\n");
// Alpha combiner
out.Write(" // Alpha Combiner\n");
out.Write(" uint alpha_a = {};\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::a>("ss.ac"));
out.Write(" uint alpha_b = {};\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::b>("ss.ac"));
out.Write(" uint alpha_c = {};\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::c>("ss.ac"));
out.Write(" uint alpha_d = {};\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::d>("ss.ac"));
out.Write(" uint alpha_bias = {};\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::bias>("ss.ac"));
out.Write(" bool alpha_op = bool({});\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::op>("ss.ac"));
out.Write(" bool alpha_clamp = bool({});\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::clamp>("ss.ac"));
out.Write(" uint alpha_shift = {};\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::scale>("ss.ac"));
out.Write(" uint alpha_dest = {};\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::dest>("ss.ac"));
out.Write(
" uint alpha_compare_op = alpha_shift << 1 | uint(alpha_op);\n"
"\n"
" int alpha_A;\n"
" int alpha_B;\n"
" if (alpha_bias != 3u || alpha_compare_op > 5u) {{\n"
" // Small optimisation here: alpha_A and alpha_B are unused by compare ops 0-5\n"
" alpha_A = selectAlphaInput(s, ss, {0}colors_0, {0}colors_1, alpha_a) & 255;\n"
" alpha_B = selectAlphaInput(s, ss, {0}colors_0, {0}colors_1, alpha_b) & 255;\n"
" }};\n"
" int alpha_C = selectAlphaInput(s, ss, {0}colors_0, {0}colors_1, alpha_c) & 255;\n"
" int alpha_D = selectAlphaInput(s, ss, {0}colors_0, {0}colors_1, alpha_d); // 10 bits "
"+ sign\n"
"\n", // TODO: do we need to sign extend?
color_input_prefix);
out.Write("\n"
" int alpha;\n"
" if (alpha_bias != 3u) {{ // Normal mode\n"
" alpha = tevLerp(alpha_A, alpha_B, alpha_C, alpha_D, alpha_bias, alpha_op, "
"true, alpha_shift);\n"
" }} else {{ // Compare mode\n"
" if (alpha_compare_op == 6u) {{\n"
" // TevCompareMode::A8, TevComparison::GT\n"
" alpha = (alpha_A > alpha_B) ? alpha_C : 0;\n"
" }} else if (alpha_compare_op == 7u) {{\n"
" // TevCompareMode::A8, TevComparison::EQ\n"
" alpha = (alpha_A == alpha_B) ? alpha_C : 0;\n"
" }} else {{\n"
" // All remaining alpha compare ops actually compare the color channels\n"
" alpha = tevCompare(alpha_compare_op, color_A, color_B) ? alpha_C : 0;\n"
" }}\n"
" alpha = alpha_D + alpha;\n"
" }}\n"
"\n"
" // Clamp result\n"
" if (alpha_clamp)\n"
" alpha = clamp(alpha, 0, 255);\n"
" else\n"
" alpha = clamp(alpha, -1024, 1023);\n"
"\n"
" // Write result to the correct input register of the next stage\n"
" setRegAlpha(s, alpha_dest, alpha);\n"
" }}\n");
out.Write(" }} // Main TEV loop\n"
"\n");
// Select the output color and alpha registers from the last stage.
out.Write(" int4 TevResult;\n");
out.Write(
" TevResult.xyz = getTevReg(s, {}).xyz;\n",
BitfieldExtract<&TevStageCombiner::ColorCombiner::dest>("bpmem_combiners(num_stages).x"));
out.Write(
" TevResult.w = getTevReg(s, {}).w;\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::dest>("bpmem_combiners(num_stages).y"));
out.Write(" TevResult &= 255;\n\n");
if (host_config.fast_depth_calc)
{
if (!host_config.backend_reversed_depth_range)
out.Write(" int zCoord = int((1.0 - rawpos.z) * 16777216.0);\n");
else
out.Write(" int zCoord = int(rawpos.z * 16777216.0);\n");
out.Write(" zCoord = clamp(zCoord, 0, 0xFFFFFF);\n"
"\n");
}
else
{
out.Write("\tint zCoord = " I_ZBIAS "[1].x + int((clipPos.z / clipPos.w) * float(" I_ZBIAS
"[1].y));\n");
}
// ===========
// ZFreeze
// ===========
if (per_pixel_depth)
{
// Zfreeze forces early depth off
out.Write(" // ZFreeze\n"
" if ((bpmem_genmode & {}u) != 0u) {{\n",
1 << GenMode().zfreeze.StartBit());
out.Write(" float2 screenpos = rawpos.xy * " I_EFBSCALE ".xy;\n");
if (ApiType == APIType::OpenGL)
{
out.Write(" // OpenGL has reversed vertical screenspace coordinates\n"
" screenpos.y = 528.0 - screenpos.y;\n");
}
out.Write(" zCoord = int(" I_ZSLOPE ".z + " I_ZSLOPE ".x * screenpos.x + " I_ZSLOPE
".y * screenpos.y);\n"
" }}\n"
"\n");
}
// =================
// Depth Texture
// =================
out.Write(" // Depth Texture\n"
" int early_zCoord = zCoord;\n"
" if (bpmem_ztex_op != 0u) {{\n"
" int ztex = int(" I_ZBIAS "[1].w); // fixed bias\n"
"\n"
" // Whatever texture was in our last stage, it's now our depth texture\n"
" ztex += idot(s.TexColor.xyzw, " I_ZBIAS "[0].xyzw);\n"
" ztex += (bpmem_ztex_op == 1u) ? zCoord : 0;\n"
" zCoord = ztex & 0xFFFFFF;\n"
" }}\n"
"\n");
if (per_pixel_depth)
{
out.Write(" // If early depth is enabled, write to zbuffer before depth textures\n"
" // If early depth isn't enabled, we write to the zbuffer here\n"
" int zbuffer_zCoord = bpmem_late_ztest ? zCoord : early_zCoord;\n");
if (!host_config.backend_reversed_depth_range)
out.Write(" depth = 1.0 - float(zbuffer_zCoord) / 16777216.0;\n");
else
out.Write(" depth = float(zbuffer_zCoord) / 16777216.0;\n");
}
out.Write(" // Alpha Test\n"
" if (bpmem_alphaTest != 0u) {{\n"
" bool comp0 = alphaCompare(TevResult.a, " I_ALPHA ".r, {});\n",
BitfieldExtract<&AlphaTest::comp0>("bpmem_alphaTest"));
out.Write(" bool comp1 = alphaCompare(TevResult.a, " I_ALPHA ".g, {});\n",
BitfieldExtract<&AlphaTest::comp1>("bpmem_alphaTest"));
out.Write("\n"
" // These if statements are written weirdly to work around intel and Qualcomm "
"bugs with handling booleans.\n"
" switch ({}) {{\n",
BitfieldExtract<&AlphaTest::logic>("bpmem_alphaTest"));
out.Write(" case 0u: // AND\n"
" if (comp0 && comp1) break; else discard; break;\n"
" case 1u: // OR\n"
" if (comp0 || comp1) break; else discard; break;\n"
" case 2u: // XOR\n"
" if (comp0 != comp1) break; else discard; break;\n"
" case 3u: // XNOR\n"
" if (comp0 == comp1) break; else discard; break;\n"
" }}\n"
" }}\n"
"\n");
// =========
// Dithering
// =========
out.Write(" if (bpmem_dither) {{\n"
" // Flipper uses a standard 2x2 Bayer Matrix for 6 bit dithering\n"
" // Here the matrix is encoded into the two factor constants\n"
" int2 dither = int2(rawpos.xy) & 1;\n"
" TevResult.rgb = (TevResult.rgb - (TevResult.rgb >> 6)) + abs(dither.y * 3 - "
"dither.x * 2);\n"
" }}\n\n");
// =========
// Fog
// =========
// FIXME: Fog is implemented the same as ShaderGen, but ShaderGen's fog is all hacks.
// Should be fixed point, and should not make guesses about Range-Based adjustments.
out.Write(" // Fog\n"
" uint fog_function = {};\n",
BitfieldExtract<&FogParam3::fsel>("bpmem_fogParam3"));
out.Write(" if (fog_function != {:s}) {{\n", FogType::Off);
out.Write(" // TODO: This all needs to be converted from float to fixed point\n"
" float ze;\n"
" if ({} == 0u) {{\n",
BitfieldExtract<&FogParam3::proj>("bpmem_fogParam3"));
out.Write(" // perspective\n"
" // ze = A/(B - (Zs >> B_SHF)\n"
" ze = (" I_FOGF ".x * 16777216.0) / float(" I_FOGI ".y - (zCoord >> " I_FOGI
".w));\n"
" }} else {{\n"
" // orthographic\n"
" // ze = a*Zs (here, no B_SHF)\n"
" ze = " I_FOGF ".z * float(zCoord) / 16777216.0;\n"
" }}\n"
"\n"
" if (bool({})) {{\n",
BitfieldExtract<&FogRangeParams::RangeBase::Enabled>("bpmem_fogRangeBase"));
out.Write(" // x_adjust = sqrt((x-center)^2 + k^2)/k\n"
" // ze *= x_adjust\n"
" float offset = (2.0 * (rawpos.x / " I_FOGF ".w)) - 1.0 - " I_FOGF ".z;\n"
" float floatindex = clamp(9.0 - abs(offset) * 9.0, 0.0, 9.0);\n"
" uint indexlower = uint(floatindex);\n"
" uint indexupper = indexlower + 1u;\n"
" float klower = " I_FOGRANGE "[indexlower >> 2u][indexlower & 3u];\n"
" float kupper = " I_FOGRANGE "[indexupper >> 2u][indexupper & 3u];\n"
" float k = lerp(klower, kupper, frac(floatindex));\n"
" float x_adjust = sqrt(offset * offset + k * k) / k;\n"
" ze *= x_adjust;\n"
" }}\n"
"\n"
" float fog = clamp(ze - " I_FOGF ".y, 0.0, 1.0);\n"
"\n");
out.Write(" if (fog_function >= {:s}) {{\n", FogType::Exp);
out.Write(" switch (fog_function) {{\n"
" case {:s}:\n"
" fog = 1.0 - exp2(-8.0 * fog);\n"
" break;\n",
FogType::Exp);
out.Write(" case {:s}:\n"
" fog = 1.0 - exp2(-8.0 * fog * fog);\n"
" break;\n",
FogType::ExpSq);
out.Write(" case {:s}:\n"
" fog = exp2(-8.0 * (1.0 - fog));\n"
" break;\n",
FogType::BackwardsExp);
out.Write(" case {:s}:\n"
" fog = 1.0 - fog;\n"
" fog = exp2(-8.0 * fog * fog);\n"
" break;\n",
FogType::BackwardsExpSq);
out.Write(" }}\n"
" }}\n"
"\n"
" int ifog = iround(fog * 256.0);\n"
" TevResult.rgb = (TevResult.rgb * (256 - ifog) + " I_FOGCOLOR ".rgb * ifog) >> 8;\n"
" }}\n"
"\n");
// D3D requires that the shader outputs be uint when writing to a uint render target for logic op.
if (ApiType == APIType::D3D && uid_data->uint_output)
{
out.Write(" if (bpmem_rgba6_format)\n"
" ocol0 = uint4(TevResult & 0xFC);\n"
" else\n"
" ocol0 = uint4(TevResult);\n"
"\n");
}
else
{
out.Write(" if (bpmem_rgba6_format)\n"
" ocol0.rgb = float3(TevResult.rgb >> 2) / 63.0;\n"
" else\n"
" ocol0.rgb = float3(TevResult.rgb) / 255.0;\n"
"\n"
" if (bpmem_dstalpha != 0u)\n");
out.Write(" ocol0.a = float({} >> 2) / 63.0;\n",
BitfieldExtract<&ConstantAlpha::alpha>("bpmem_dstalpha"));
out.Write(" else\n"
" ocol0.a = float(TevResult.a >> 2) / 63.0;\n"
" \n");
if (use_dual_source || use_shader_blend)
{
out.Write(" // Dest alpha override (dual source blending)\n"
" // Colors will be blended against the alpha from ocol1 and\n"
" // the alpha from ocol0 will be written to the framebuffer.\n"
" ocol1 = float4(0.0, 0.0, 0.0, float(TevResult.a) / 255.0);\n");
}
}
if (bounding_box)
{
out.Write(" if (bpmem_bounding_box) {{\n"
" UpdateBoundingBox(rawpos.xy);\n"
" }}\n");
}
if (use_shader_blend)
{
static constexpr std::array<std::string_view, 8> blendSrcFactor{{
"float3(0,0,0);", // ZERO
"float3(1,1,1);", // ONE
"initial_ocol0.rgb;", // DSTCLR
"float3(1,1,1) - initial_ocol0.rgb;", // INVDSTCLR
"ocol1.aaa;", // SRCALPHA
"float3(1,1,1) - ocol1.aaa;", // INVSRCALPHA
"initial_ocol0.aaa;", // DSTALPHA
"float3(1,1,1) - initial_ocol0.aaa;", // INVDSTALPHA
}};
static constexpr std::array<std::string_view, 8> blendSrcFactorAlpha{{
"0.0;", // ZERO
"1.0;", // ONE
"initial_ocol0.a;", // DSTCLR
"1.0 - initial_ocol0.a;", // INVDSTCLR
"ocol1.a;", // SRCALPHA
"1.0 - ocol1.a;", // INVSRCALPHA
"initial_ocol0.a;", // DSTALPHA
"1.0 - initial_ocol0.a;", // INVDSTALPHA
}};
static constexpr std::array<std::string_view, 8> blendDstFactor{{
"float3(0,0,0);", // ZERO
"float3(1,1,1);", // ONE
"ocol0.rgb;", // SRCCLR
"float3(1,1,1) - ocol0.rgb;", // INVSRCCLR
"ocol1.aaa;", // SRCALHA
"float3(1,1,1) - ocol1.aaa;", // INVSRCALPHA
"initial_ocol0.aaa;", // DSTALPHA
"float3(1,1,1) - initial_ocol0.aaa;", // INVDSTALPHA
}};
static constexpr std::array<std::string_view, 8> blendDstFactorAlpha{{
"0.0;", // ZERO
"1.0;", // ONE
"ocol0.a;", // SRCCLR
"1.0 - ocol0.a;", // INVSRCCLR
"ocol1.a;", // SRCALPHA
"1.0 - ocol1.a;", // INVSRCALPHA
"initial_ocol0.a;", // DSTALPHA
"1.0 - initial_ocol0.a;", // INVDSTALPHA
}};
out.Write(" if (blend_enable) {{\n"
" float4 blend_src;\n"
" switch (blend_src_factor) {{\n");
for (size_t i = 0; i < blendSrcFactor.size(); i++)
{
out.Write(" case {}u: blend_src.rgb = {}; break;\n", i, blendSrcFactor[i]);
}
out.Write(" }}\n"
" switch (blend_src_factor_alpha) {{\n");
for (size_t i = 0; i < blendSrcFactorAlpha.size(); i++)
{
out.Write(" case {}u: blend_src.a = {}; break;\n", i, blendSrcFactorAlpha[i]);
}
out.Write(" }}\n"
" float4 blend_dst;\n"
" switch (blend_dst_factor) {{\n");
for (size_t i = 0; i < blendDstFactor.size(); i++)
{
out.Write(" case {}u: blend_dst.rgb = {}; break;\n", i, blendDstFactor[i]);
}
out.Write(" }}\n"
" switch (blend_dst_factor_alpha) {{\n");
for (size_t i = 0; i < blendDstFactorAlpha.size(); i++)
{
out.Write(" case {}u: blend_dst.a = {}; break;\n", i, blendDstFactorAlpha[i]);
}
out.Write(
" }}\n"
" float4 blend_result;\n"
" if (blend_subtract)\n"
" blend_result.rgb = initial_ocol0.rgb * blend_dst.rgb - ocol0.rgb * blend_src.rgb;\n"
" else\n"
" blend_result.rgb = initial_ocol0.rgb * blend_dst.rgb + ocol0.rgb * "
"blend_src.rgb;\n");
out.Write(" if (blend_subtract_alpha)\n"
" blend_result.a = initial_ocol0.a * blend_dst.a - ocol0.a * blend_src.a;\n"
" else\n"
" blend_result.a = initial_ocol0.a * blend_dst.a + ocol0.a * blend_src.a;\n");
out.Write(" real_ocol0 = blend_result;\n");
out.Write(" }} else {{\n"
" real_ocol0 = ocol0;\n"
" }}\n");
}
out.Write("}}\n"
"\n"
"int4 getRasColor(State s, StageState ss, float4 colors_0, float4 colors_1) {{\n"
" // Select Ras for stage\n"
" uint ras = {};\n",
BitfieldExtract<&TwoTevStageOrders::colorchan0>("ss.order"));
out.Write(" if (ras < 2u) {{ // Lighting Channel 0 or 1\n"
" int4 color = iround(((ras == 0u) ? colors_0 : colors_1) * 255.0);\n"
" uint swap = {};\n",
BitfieldExtract<&TevStageCombiner::AlphaCombiner::rswap>("ss.ac"));
out.Write(" return Swizzle(swap, color);\n");
out.Write(" }} else if (ras == 5u) {{ // Alpha Bumb\n"
" return int4(s.AlphaBump, s.AlphaBump, s.AlphaBump, s.AlphaBump);\n"
" }} else if (ras == 6u) {{ // Normalzied Alpha Bump\n"
" int normalized = s.AlphaBump | s.AlphaBump >> 5;\n"
" return int4(normalized, normalized, normalized, normalized);\n"
" }} else {{\n"
" return int4(0, 0, 0, 0);\n"
" }}\n"
"}}\n"
"\n"
"int4 getKonstColor(State s, StageState ss) {{\n"
" // Select Konst for stage\n"
" // TODO: a switch case might be better here than an dynamically"
" // indexed uniform lookup\n"
" uint tevksel = bpmem_tevksel(ss.stage>>1);\n"
" if ((ss.stage & 1u) == 0u)\n"
" return int4(konstLookup[{}].rgb, konstLookup[{}].a);\n",
BitfieldExtract<&TevKSel::kcsel0>("tevksel"),
BitfieldExtract<&TevKSel::kasel0>("tevksel"));
out.Write(" else\n"
" return int4(konstLookup[{}].rgb, konstLookup[{}].a);\n",
BitfieldExtract<&TevKSel::kcsel1>("tevksel"),
BitfieldExtract<&TevKSel::kasel1>("tevksel"));
out.Write("}}\n");
return out;
}
void EnumeratePixelShaderUids(const std::function<void(const PixelShaderUid&)>& callback)
{
PixelShaderUid uid;
for (u32 texgens = 0; texgens <= 8; texgens++)
{
pixel_ubershader_uid_data* const puid = uid.GetUidData();
puid->num_texgens = texgens;
for (u32 early_depth = 0; early_depth < 2; early_depth++)
{
puid->early_depth = early_depth != 0;
for (u32 per_pixel_depth = 0; per_pixel_depth < 2; per_pixel_depth++)
{
// Don't generate shaders where we have early depth tests enabled, and write gl_FragDepth.
if (early_depth && per_pixel_depth)
continue;
puid->per_pixel_depth = per_pixel_depth != 0;
for (u32 uint_output = 0; uint_output < 2; uint_output++)
{
puid->uint_output = uint_output;
callback(uid);
}
}
}
}
}
} // namespace UberShader
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