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dolphin/Source/Core/VideoCommon/UberShaderCommon.cpp

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ShaderGen: Implement pixel ubershaders
2017-07-19 23:25:24 -06:00
// Copyright 2017 Dolphin Emulator Project
treewide: convert GPLv2+ license info to SPDX tags SPDX standardizes how source code conveys its copyright and licensing information. See https://spdx.github.io/spdx-spec/1-rationale/ . SPDX tags are adopted in many large projects, including things like the Linux kernel.
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// SPDX-License-Identifier: GPL-2.0-or-later
ShaderGen: Implement pixel ubershaders
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#include "VideoCommon/UberShaderCommon.h"
Ubershaders: Support per-pixel lighting
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#include "VideoCommon/NativeVertexFormat.h"
VideoCommon/ShaderGenCommon: Make template functions regular functions These are only ever used with ShaderCode instances and nothing else. Given that, we can convert these helper functions to expect that type of object as an argument and remove the need for templates, improving compiler throughput a marginal amount, as the template instantiation process doesn't need to be performed. We can also move the definitions of these functions into the cpp file, which allows us to remove a few inclusions from the ShaderGenCommon header. This uncovered a few instances of indirect inclusions being relied upon in other source files. One other benefit is this allows changes to be made to the definitions of the functions without needing to recompile all translation units that make use of these functions, making change testing a little quicker. Moving the definitions into the cpp file also allows us to completely hide DefineOutputMember() from external view, given it's only ever used inside of GenerateVSOutputMembers().
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#include "VideoCommon/ShaderGenCommon.h"
#include "VideoCommon/VideoCommon.h"
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#include "VideoCommon/XFMemory.h"
ShaderGen: Implement pixel ubershaders
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namespace UberShader
{
void WriteUberShaderCommonHeader(ShaderCode& out, APIType api_type,
const ShaderHostConfig& host_config)
{
// ==============================================
// BitfieldExtract for APIs which don't have it
// ==============================================
if (!host_config.backend_bitfield)
{
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write("uint bitfieldExtract(uint val, int off, int size) {{\n"
" // This built-in function is only support in OpenGL 4.0+ and ES 3.1+\n"
" // Microsoft's HLSL compiler automatically optimises this to a bitfield extract "
"instruction.\n"
" uint mask = uint((1 << size) - 1);\n"
" return uint(val >> off) & mask;\n"
"}}\n\n");
ShaderGen: Implement pixel ubershaders
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}
}
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void WriteLightingFunction(ShaderCode& out)
{
// ==============================================
// Lighting channel calculation helper
// ==============================================
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write("int4 CalculateLighting(uint index, uint attnfunc, uint diffusefunc, float3 pos, "
"float3 normal) {{\n"
" float3 ldir, h, cosAttn, distAttn;\n"
" float dist, dist2, attn;\n"
"\n"
" switch (attnfunc) {{\n");
Convert XFMemory to BitField and enum class Additionally a new ClipDisable union has been added (though it is not currently used by Dolphin).
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out.Write(" case {:s}:\n", AttenuationFunc::None);
out.Write(" case {:s}:\n", AttenuationFunc::Dir);
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(" ldir = normalize(" I_LIGHTS "[index].pos.xyz - pos.xyz);\n"
" attn = 1.0;\n"
" if (length(ldir) == 0.0)\n"
" ldir = normal;\n"
" break;\n\n");
Convert XFMemory to BitField and enum class Additionally a new ClipDisable union has been added (though it is not currently used by Dolphin).
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out.Write(" case {:s}:\n", AttenuationFunc::Spec);
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(" ldir = normalize(" I_LIGHTS "[index].pos.xyz - pos.xyz);\n"
" attn = (dot(normal, ldir) >= 0.0) ? max(0.0, dot(normal, " I_LIGHTS
"[index].dir.xyz)) : 0.0;\n"
" cosAttn = " I_LIGHTS "[index].cosatt.xyz;\n");
Convert XFMemory to BitField and enum class Additionally a new ClipDisable union has been added (though it is not currently used by Dolphin).
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out.Write(" if (diffusefunc == {:s})\n", DiffuseFunc::None);
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(" distAttn = " I_LIGHTS "[index].distatt.xyz;\n"
" else\n"
" distAttn = normalize(" I_LIGHTS "[index].distatt.xyz);\n"
" attn = max(0.0, dot(cosAttn, float3(1.0, attn, attn*attn))) / dot(distAttn, "
"float3(1.0, attn, attn*attn));\n"
" break;\n\n");
Convert XFMemory to BitField and enum class Additionally a new ClipDisable union has been added (though it is not currently used by Dolphin).
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out.Write(" case {:s}:\n", AttenuationFunc::Spot);
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(" ldir = " I_LIGHTS "[index].pos.xyz - pos.xyz;\n"
" dist2 = dot(ldir, ldir);\n"
" dist = sqrt(dist2);\n"
" ldir = ldir / dist;\n"
" attn = max(0.0, dot(ldir, " I_LIGHTS "[index].dir.xyz));\n"
" attn = max(0.0, " I_LIGHTS "[index].cosatt.x + " I_LIGHTS
"[index].cosatt.y * attn + " I_LIGHTS "[index].cosatt.z * attn * attn) / dot(" I_LIGHTS
"[index].distatt.xyz, float3(1.0, dist, dist2));\n"
" break;\n\n");
out.Write(" default:\n"
" attn = 1.0;\n"
" ldir = normal;\n"
" break;\n"
" }}\n"
"\n"
" switch (diffusefunc) {{\n");
Convert XFMemory to BitField and enum class Additionally a new ClipDisable union has been added (though it is not currently used by Dolphin).
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out.Write(" case {:s}:\n", DiffuseFunc::None);
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(" return int4(round(attn * float4(" I_LIGHTS "[index].color)));\n\n");
Convert XFMemory to BitField and enum class Additionally a new ClipDisable union has been added (though it is not currently used by Dolphin).
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out.Write(" case {:s}:\n", DiffuseFunc::Sign);
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(" return int4(round(attn * dot(ldir, normal) * float4(" I_LIGHTS
"[index].color)));\n\n");
Convert XFMemory to BitField and enum class Additionally a new ClipDisable union has been added (though it is not currently used by Dolphin).
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out.Write(" case {:s}:\n", DiffuseFunc::Clamp);
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(" return int4(round(attn * max(0.0, dot(ldir, normal)) * float4(" I_LIGHTS
"[index].color)));\n\n");
out.Write(" default:\n"
" return int4(0, 0, 0, 0);\n"
" }}\n"
"}}\n\n");
Ubershaders: Support per-pixel lighting
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}
UberShaderCommon: Migrate over to fmt Continues migration of the shader generators over to fmt.
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void WriteVertexLighting(ShaderCode& out, APIType api_type, std::string_view world_pos_var,
std::string_view normal_var, std::string_view in_color_0_var,
std::string_view in_color_1_var, std::string_view out_color_0_var,
std::string_view out_color_1_var)
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{
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write("// Lighting\n");
out.Write("{}for (uint chan = 0u; chan < {}u; chan++) {{\n",
api_type == APIType::D3D ? "[loop] " : "", NUM_XF_COLOR_CHANNELS);
out.Write(" uint colorreg = xfmem_color(chan);\n"
" uint alphareg = xfmem_alpha(chan);\n"
" int4 mat = " I_MATERIALS "[chan + 2u]; \n"
" int4 lacc = int4(255, 255, 255, 255);\n"
"\n");
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Change BitfieldExtract to use a pointer to the bitfield member
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out.Write(" if ({} != 0u)\n", BitfieldExtract<&LitChannel::matsource>("colorreg"));
LightingShaderGen: Always calculate lighting for both color channels Cel-damage depends on lighting being calculated for the first channel even though there is no color in the vertex format (defaults to the material color). If lighting for the channel is not enabled, the vertex will use the default color as before. The default value of the color is determined by the number of elements in the vertex format. This fixes the grey cubes in Super Mario Sunshine. If the color channel count is zero, we set the color to black before the end of the vertex shader. It's possible that this would be undefined behavior on hardware if a vertex color index that was greater than the channel count was used within TEV.
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out.Write(" mat.xyz = int3(round(((chan == 0u) ? {}.xyz : {}.xyz) * 255.0));\n",
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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in_color_0_var, in_color_1_var);
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Change BitfieldExtract to use a pointer to the bitfield member
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out.Write(" if ({} != 0u)\n", BitfieldExtract<&LitChannel::matsource>("alphareg"));
LightingShaderGen: Always calculate lighting for both color channels Cel-damage depends on lighting being calculated for the first channel even though there is no color in the vertex format (defaults to the material color). If lighting for the channel is not enabled, the vertex will use the default color as before. The default value of the color is determined by the number of elements in the vertex format. This fixes the grey cubes in Super Mario Sunshine. If the color channel count is zero, we set the color to black before the end of the vertex shader. It's possible that this would be undefined behavior on hardware if a vertex color index that was greater than the channel count was used within TEV.
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out.Write(" mat.w = int(round(((chan == 0u) ? {}.w : {}.w) * 255.0));\n", in_color_0_var,
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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in_color_1_var);
LightingShaderGen: Always calculate lighting for both color channels Cel-damage depends on lighting being calculated for the first channel even though there is no color in the vertex format (defaults to the material color). If lighting for the channel is not enabled, the vertex will use the default color as before. The default value of the color is determined by the number of elements in the vertex format. This fixes the grey cubes in Super Mario Sunshine. If the color channel count is zero, we set the color to black before the end of the vertex shader. It's possible that this would be undefined behavior on hardware if a vertex color index that was greater than the channel count was used within TEV.
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out.Write(" else\n"
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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" mat.w = " I_MATERIALS " [chan + 2u].w;\n"
"\n");
Ubershaders: Support per-pixel lighting
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Change BitfieldExtract to use a pointer to the bitfield member
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out.Write(" if ({} != 0u) {{\n", BitfieldExtract<&LitChannel::enablelighting>("colorreg"));
out.Write(" if ({} != 0u)\n", BitfieldExtract<&LitChannel::ambsource>("colorreg"));
LightingShaderGen: Always calculate lighting for both color channels Cel-damage depends on lighting being calculated for the first channel even though there is no color in the vertex format (defaults to the material color). If lighting for the channel is not enabled, the vertex will use the default color as before. The default value of the color is determined by the number of elements in the vertex format. This fixes the grey cubes in Super Mario Sunshine. If the color channel count is zero, we set the color to black before the end of the vertex shader. It's possible that this would be undefined behavior on hardware if a vertex color index that was greater than the channel count was used within TEV.
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out.Write(" lacc.xyz = int3(round(((chan == 0u) ? {}.xyz : {}.xyz) * 255.0));\n",
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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in_color_0_var, in_color_1_var);
LightingShaderGen: Always calculate lighting for both color channels Cel-damage depends on lighting being calculated for the first channel even though there is no color in the vertex format (defaults to the material color). If lighting for the channel is not enabled, the vertex will use the default color as before. The default value of the color is determined by the number of elements in the vertex format. This fixes the grey cubes in Super Mario Sunshine. If the color channel count is zero, we set the color to black before the end of the vertex shader. It's possible that this would be undefined behavior on hardware if a vertex color index that was greater than the channel count was used within TEV.
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out.Write(" else\n"
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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" lacc.xyz = " I_MATERIALS " [chan].xyz;\n"
"\n");
out.Write(" uint light_mask = {} | ({} << 4u);\n",
Change BitfieldExtract to use a pointer to the bitfield member
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BitfieldExtract<&LitChannel::lightMask0_3>("colorreg"),
BitfieldExtract<&LitChannel::lightMask4_7>("colorreg"));
out.Write(" uint attnfunc = {};\n", BitfieldExtract<&LitChannel::attnfunc>("colorreg"));
out.Write(" uint diffusefunc = {};\n", BitfieldExtract<&LitChannel::diffusefunc>("colorreg"));
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(
UberShaderCommon: Migrate over to fmt Continues migration of the shader generators over to fmt.
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" for (uint light_index = 0u; light_index < 8u; light_index++) {{\n"
Ubershaders: Support per-pixel lighting
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" if ((light_mask & (1u << light_index)) != 0u)\n"
UberShaderCommon: Migrate over to fmt Continues migration of the shader generators over to fmt.
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" lacc.xyz += CalculateLighting(light_index, attnfunc, diffusefunc, {}, {}).xyz;\n",
Ubershaders: Support per-pixel lighting
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world_pos_var, normal_var);
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(" }}\n"
" }}\n"
"\n");
Ubershaders: Support per-pixel lighting
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Change BitfieldExtract to use a pointer to the bitfield member
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out.Write(" if ({} != 0u) {{\n", BitfieldExtract<&LitChannel::enablelighting>("alphareg"));
out.Write(" if ({} != 0u) {{\n", BitfieldExtract<&LitChannel::ambsource>("alphareg"));
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(" if ((components & ({}u << chan)) != 0u) // VB_HAS_COL0\n", VB_HAS_COL0);
out.Write(" lacc.w = int(round(((chan == 0u) ? {}.w : {}.w) * 255.0));\n", in_color_0_var,
in_color_1_var);
out.Write(" else if ((components & {}u) != 0u) // VB_HAS_COLO0\n", VB_HAS_COL0);
out.Write(" lacc.w = int(round({}.w * 255.0));\n", in_color_0_var);
out.Write(" else\n"
" lacc.w = 255;\n"
" }} else {{\n"
" lacc.w = " I_MATERIALS " [chan].w;\n"
" }}\n"
"\n");
out.Write(" uint light_mask = {} | ({} << 4u);\n",
Change BitfieldExtract to use a pointer to the bitfield member
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BitfieldExtract<&LitChannel::lightMask0_3>("alphareg"),
BitfieldExtract<&LitChannel::lightMask4_7>("alphareg"));
out.Write(" uint attnfunc = {};\n", BitfieldExtract<&LitChannel::attnfunc>("alphareg"));
out.Write(" uint diffusefunc = {};\n", BitfieldExtract<&LitChannel::diffusefunc>("alphareg"));
ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(" for (uint light_index = 0u; light_index < 8u; light_index++) {{\n\n"
" if ((light_mask & (1u << light_index)) != 0u)\n\n"
" lacc.w += CalculateLighting(light_index, attnfunc, diffusefunc, {}, {}).w;\n",
world_pos_var, normal_var);
out.Write(" }}\n"
" }}\n"
"\n");
Ubershaders: Support per-pixel lighting
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ShaderGenCommon: Rename WriteFmt() to Write() Now that we've converted all of the shader generators over to using fmt, we can drop the old Write() member function and perform a rename operation on the WriteFmt() to turn it into the new Write() function. All changes within this are the removal of a <cstdarg> header, since the previous printf-based Write() required it, and renaming. No functional changes are made at all.
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out.Write(" lacc = clamp(lacc, 0, 255);\n"
"\n"
" // Hopefully GPUs that can support dynamic indexing will optimize this.\n"
" float4 lit_color = float4((mat * (lacc + (lacc >> 7))) >> 8) / 255.0;\n"
" switch (chan) {{\n"
" case 0u: {} = lit_color; break;\n",
out_color_0_var);
out.Write(" case 1u: {} = lit_color; break;\n", out_color_1_var);
out.Write(" }}\n"
"}}\n"
"\n");
Ubershaders: Support per-pixel lighting
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}
Reformat repo to clang-format 7.0 rules
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} // namespace UberShader
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