// Copyright 2015 Dolphin Emulator Project // SPDX-License-Identifier: GPL-2.0-or-later #include "VideoCommon/UberShaderVertex.h" #include "VideoCommon/DriverDetails.h" #include "VideoCommon/NativeVertexFormat.h" #include "VideoCommon/UberShaderCommon.h" #include "VideoCommon/VertexShaderGen.h" #include "VideoCommon/VideoCommon.h" #include "VideoCommon/XFMemory.h" namespace UberShader { VertexShaderUid GetVertexShaderUid() { VertexShaderUid out; vertex_ubershader_uid_data* const uid_data = out.GetUidData(); uid_data->num_texgens = xfmem.numTexGen.numTexGens; return out; } static void GenVertexShaderTexGens(APIType api_type, u32 num_texgen, ShaderCode& out); ShaderCode GenVertexShader(APIType api_type, const ShaderHostConfig& host_config, const vertex_ubershader_uid_data* uid_data) { const bool msaa = host_config.msaa; const bool ssaa = host_config.ssaa; const bool per_pixel_lighting = host_config.per_pixel_lighting; const bool vertex_rounding = host_config.vertex_rounding; const u32 num_texgen = uid_data->num_texgens; ShaderCode out; out.Write("// Vertex UberShader\n\n"); out.Write("{}", s_lighting_struct); // uniforms if (api_type == APIType::OpenGL || api_type == APIType::Vulkan) out.Write("UBO_BINDING(std140, 2) uniform VSBlock {{\n"); else out.Write("cbuffer VSBlock {{\n"); out.Write("{}", s_shader_uniforms); out.Write("}};\n"); out.Write("struct VS_OUTPUT {{\n"); GenerateVSOutputMembers(out, api_type, num_texgen, host_config, ""); out.Write("}};\n\n"); WriteUberShaderCommonHeader(out, api_type, host_config); WriteIsNanHeader(out, api_type); WriteLightingFunction(out); if (api_type == APIType::OpenGL || api_type == APIType::Vulkan) { out.Write("ATTRIBUTE_LOCATION({}) in float4 rawpos;\n", SHADER_POSITION_ATTRIB); out.Write("ATTRIBUTE_LOCATION({}) in uint4 posmtx;\n", SHADER_POSMTX_ATTRIB); out.Write("ATTRIBUTE_LOCATION({}) in float3 rawnorm0;\n", SHADER_NORM0_ATTRIB); out.Write("ATTRIBUTE_LOCATION({}) in float3 rawnorm1;\n", SHADER_NORM1_ATTRIB); out.Write("ATTRIBUTE_LOCATION({}) in float3 rawnorm2;\n", SHADER_NORM2_ATTRIB); out.Write("ATTRIBUTE_LOCATION({}) in float4 rawcolor0;\n", SHADER_COLOR0_ATTRIB); out.Write("ATTRIBUTE_LOCATION({}) in float4 rawcolor1;\n", SHADER_COLOR1_ATTRIB); for (int i = 0; i < 8; ++i) out.Write("ATTRIBUTE_LOCATION({}) in float3 rawtex{};\n", SHADER_TEXTURE0_ATTRIB + i, i); if (host_config.backend_geometry_shaders) { out.Write("VARYING_LOCATION(0) out VertexData {{\n"); GenerateVSOutputMembers(out, api_type, num_texgen, host_config, GetInterpolationQualifier(msaa, ssaa, true, false)); out.Write("}} vs;\n"); } else { // Let's set up attributes u32 counter = 0; out.Write("VARYING_LOCATION({}) {} out float4 colors_0;\n", counter++, GetInterpolationQualifier(msaa, ssaa)); out.Write("VARYING_LOCATION({}) {} out float4 colors_1;\n", counter++, GetInterpolationQualifier(msaa, ssaa)); for (u32 i = 0; i < num_texgen; ++i) { out.Write("VARYING_LOCATION({}) {} out float3 tex{};\n", counter++, GetInterpolationQualifier(msaa, ssaa), i); } if (!host_config.fast_depth_calc) { out.Write("VARYING_LOCATION({}) {} out float4 clipPos;\n", counter++, GetInterpolationQualifier(msaa, ssaa)); } if (per_pixel_lighting) { out.Write("VARYING_LOCATION({}) {} out float3 Normal;\n", counter++, GetInterpolationQualifier(msaa, ssaa)); out.Write("VARYING_LOCATION({}) {} out float3 WorldPos;\n", counter++, GetInterpolationQualifier(msaa, ssaa)); } } out.Write("void main()\n{{\n"); } else // D3D { out.Write("VS_OUTPUT main(\n"); // inputs out.Write(" float3 rawnorm0 : NORMAL0,\n" " float3 rawnorm1 : NORMAL1,\n" " float3 rawnorm2 : NORMAL2,\n" " float4 rawcolor0 : COLOR0,\n" " float4 rawcolor1 : COLOR1,\n"); for (int i = 0; i < 8; ++i) out.Write(" float3 rawtex{} : TEXCOORD{},\n", i, i); out.Write(" uint posmtx : BLENDINDICES,\n"); out.Write(" float4 rawpos : POSITION) {{\n"); } out.Write("VS_OUTPUT o;\n" "\n"); // Transforms out.Write("// Position matrix\n" "float4 P0;\n" "float4 P1;\n" "float4 P2;\n" "\n" "// Normal matrix\n" "float3 N0;\n" "float3 N1;\n" "float3 N2;\n" "\n" "if ((components & {}u) != 0u) {{// VB_HAS_POSMTXIDX\n", VB_HAS_POSMTXIDX); out.Write(" // Vertex format has a per-vertex matrix\n" " int posidx = int(posmtx.r);\n" " P0 = " I_TRANSFORMMATRICES "[posidx];\n" " P1 = " I_TRANSFORMMATRICES "[posidx+1];\n" " P2 = " I_TRANSFORMMATRICES "[posidx+2];\n" "\n" " int normidx = posidx >= 32 ? (posidx - 32) : posidx;\n" " N0 = " I_NORMALMATRICES "[normidx].xyz;\n" " N1 = " I_NORMALMATRICES "[normidx+1].xyz;\n" " N2 = " I_NORMALMATRICES "[normidx+2].xyz;\n" "}} else {{\n" " // One shared matrix\n" " P0 = " I_POSNORMALMATRIX "[0];\n" " P1 = " I_POSNORMALMATRIX "[1];\n" " P2 = " I_POSNORMALMATRIX "[2];\n" " N0 = " I_POSNORMALMATRIX "[3].xyz;\n" " N1 = " I_POSNORMALMATRIX "[4].xyz;\n" " N2 = " I_POSNORMALMATRIX "[5].xyz;\n" "}}\n" "\n" "float4 pos = float4(dot(P0, rawpos), dot(P1, rawpos), dot(P2, rawpos), 1.0);\n" "o.pos = float4(dot(" I_PROJECTION "[0], pos), dot(" I_PROJECTION "[1], pos), dot(" I_PROJECTION "[2], pos), dot(" I_PROJECTION "[3], pos));\n" "\n" "// Only the first normal gets normalized (TODO: why?)\n" "float3 _norm0 = float3(0.0, 0.0, 0.0);\n" "if ((components & {}u) != 0u) // VB_HAS_NRM0\n", VB_HAS_NRM0); out.Write( " _norm0 = normalize(float3(dot(N0, rawnorm0), dot(N1, rawnorm0), dot(N2, rawnorm0)));\n" "\n" "float3 _norm1 = float3(0.0, 0.0, 0.0);\n" "if ((components & {}u) != 0u) // VB_HAS_NRM1\n", VB_HAS_NRM1); out.Write(" _norm1 = float3(dot(N0, rawnorm1), dot(N1, rawnorm1), dot(N2, rawnorm1));\n" "\n" "float3 _norm2 = float3(0.0, 0.0, 0.0);\n" "if ((components & {}u) != 0u) // VB_HAS_NRM2\n", VB_HAS_NRM2); out.Write(" _norm2 = float3(dot(N0, rawnorm2), dot(N1, rawnorm2), dot(N2, rawnorm2));\n" "\n"); // Hardware Lighting out.Write("// xfmem.numColorChans controls the number of color channels available to TEV,\n" "// but we still need to generate all channels here, as it can be used in texgen.\n" "// Cel-damage is an example of this.\n" "float4 vertex_color_0, vertex_color_1;\n" "\n"); out.Write("// To use color 1, the vertex descriptor must have color 0 and 1.\n" "// If color 1 is present but not color 0, it is used for lighting channel 0.\n" "bool use_color_1 = ((components & {0}u) == {0}u); // VB_HAS_COL0 | VB_HAS_COL1\n", VB_HAS_COL0 | VB_HAS_COL1); out.Write("for (uint color = 0u; color < {}u; color++) {{\n", NUM_XF_COLOR_CHANNELS); out.Write(" if ((color == 0u || use_color_1) && (components & ({}u << color)) != 0u) {{\n", VB_HAS_COL0); out.Write(" // Use color0 for channel 0, and color1 for channel 1 if both colors 0 and 1 are " "present.\n" " if (color == 0u)\n" " vertex_color_0 = rawcolor0;\n" " else\n" " vertex_color_1 = rawcolor1;\n" " }} else if (color == 0u && (components & {}u) != 0u) {{\n", VB_HAS_COL1); out.Write(" // Use color1 for channel 0 if color0 is not present.\n" " vertex_color_0 = rawcolor1;\n" " }} else {{\n" " if (color == 0u)\n" " vertex_color_0 = missing_color_value;\n" " else\n" " vertex_color_1 = missing_color_value;\n" " }}\n" "}}\n" "\n"); WriteVertexLighting(out, api_type, "pos.xyz", "_norm0", "vertex_color_0", "vertex_color_1", "o.colors_0", "o.colors_1"); // Texture Coordinates if (num_texgen > 0) GenVertexShaderTexGens(api_type, num_texgen, out); out.Write("// The number of colors available to TEV is determined by numColorChans.\n" "// We have to provide the fields to match the interface, so set to zero\n" "// if it's not enabled.\n"); const char* color_prefix; if (per_pixel_lighting) { out.Write("\n// Since per-pixel lighting is enabled, the vertex colors are passed through\n" "// unmodified so we can evaluate the lighting in the pixel shader.\n"); color_prefix = "vertex_color_"; } else { color_prefix = "rawcolor"; } out.Write("if (xfmem_numColorChans == 0u) {{\n" " if ((components & {}u) != 0u) // VB_HAS_COL0\n" " o.colors_0 = {}0;\n" " else\n" " o.colors_0 = float4(1.0, 1.0, 1.0, 1.0);\n" "}}\n", VB_HAS_COL0, color_prefix); out.Write("if (xfmem_numColorChans <= 1u) {{\n" " if ((components & {}u) != 0u) // VB_HAS_COL1\n" " o.colors_1 = {}1;\n" " else\n" " o.colors_1 = o.colors_0;\n" "}}\n", VB_HAS_COL1, color_prefix); if (!host_config.fast_depth_calc) { // clipPos/w needs to be done in pixel shader, not here out.Write("o.clipPos = o.pos;\n"); } if (per_pixel_lighting) { out.Write("o.Normal = _norm0;\n" "o.WorldPos = pos.xyz;\n"); } // If we can disable the incorrect depth clipping planes using depth clamping, then we can do // our own depth clipping and calculate the depth range before the perspective divide if // necessary. if (host_config.backend_depth_clamp) { // Since we're adjusting z for the depth range before the perspective divide, we have to do our // own clipping. We want to clip so that -w <= z <= 0, which matches the console -1..0 range. // We adjust our depth value for clipping purposes to match the perspective projection in the // software backend, which is a hack to fix Sonic Adventure and Unleashed games. out.Write("float clipDepth = o.pos.z * (1.0 - 1e-7);\n" "float clipDist0 = clipDepth + o.pos.w;\n" // Near: z < -w "float clipDist1 = -clipDepth;\n"); // Far: z > 0 if (host_config.backend_geometry_shaders) { out.Write("o.clipDist0 = clipDist0;\n" "o.clipDist1 = clipDist1;\n"); } } // Write the true depth value. If the game uses depth textures, then the pixel shader will // override it with the correct values if not then early z culling will improve speed. // There are two different ways to do this, when the depth range is oversized, we process // the depth range in the vertex shader, if not we let the host driver handle it. // // Adjust z for the depth range. We're using an equation which incorperates a depth inversion, // so we can map the console -1..0 range to the 0..1 range used in the depth buffer. // We have to handle the depth range in the vertex shader instead of after the perspective // divide, because some games will use a depth range larger than what is allowed by the // graphics API. These large depth ranges will still be clipped to the 0..1 range, so these // games effectively add a depth bias to the values written to the depth buffer. out.Write("o.pos.z = o.pos.w * " I_PIXELCENTERCORRECTION ".w - " "o.pos.z * " I_PIXELCENTERCORRECTION ".z;\n"); if (!host_config.backend_clip_control) { // If the graphics API doesn't support a depth range of 0..1, then we need to map z to // the -1..1 range. Unfortunately we have to use a substraction, which is a lossy floating-point // operation that can introduce a round-trip error. out.Write("o.pos.z = o.pos.z * 2.0 - o.pos.w;\n"); } // Correct for negative viewports by mirroring all vertices. We need to negate the height here, // since the viewport height is already negated by the render backend. out.Write("o.pos.xy *= sign(" I_PIXELCENTERCORRECTION ".xy * float2(1.0, -1.0));\n"); // The console GPU places the pixel center at 7/12 in screen space unless // antialiasing is enabled, while D3D and OpenGL place it at 0.5. This results // in some primitives being placed one pixel too far to the bottom-right, // which in turn can be critical if it happens for clear quads. // Hence, we compensate for this pixel center difference so that primitives // get rasterized correctly. out.Write("o.pos.xy = o.pos.xy - o.pos.w * " I_PIXELCENTERCORRECTION ".xy;\n"); if (vertex_rounding) { // By now our position is in clip space. However, higher resolutions than the Wii outputs // cause an additional pixel offset. Due to a higher pixel density we need to correct this // by converting our clip-space position into the Wii's screen-space. // Acquire the right pixel and then convert it back. out.Write("if (o.pos.w == 1.0f)\n" "{{\n"); out.Write("\tfloat ss_pixel_x = ((o.pos.x + 1.0f) * (" I_VIEWPORT_SIZE ".x * 0.5f));\n" "\tfloat ss_pixel_y = ((o.pos.y + 1.0f) * (" I_VIEWPORT_SIZE ".y * 0.5f));\n"); out.Write("\tss_pixel_x = round(ss_pixel_x);\n" "\tss_pixel_y = round(ss_pixel_y);\n"); out.Write("\to.pos.x = ((ss_pixel_x / (" I_VIEWPORT_SIZE ".x * 0.5f)) - 1.0f);\n" "\to.pos.y = ((ss_pixel_y / (" I_VIEWPORT_SIZE ".y * 0.5f)) - 1.0f);\n" "}}\n"); } if (api_type == APIType::OpenGL || api_type == APIType::Vulkan) { if (host_config.backend_geometry_shaders) { AssignVSOutputMembers(out, "vs", "o", num_texgen, host_config); } else { // TODO: Pass interface blocks between shader stages even if geometry shaders // are not supported, however that will require at least OpenGL 3.2 support. for (u32 i = 0; i < num_texgen; ++i) out.Write("tex{}.xyz = o.tex{};\n", i, i); if (!host_config.fast_depth_calc) out.Write("clipPos = o.clipPos;\n"); if (per_pixel_lighting) { out.Write("Normal = o.Normal;\n" "WorldPos = o.WorldPos;\n"); } out.Write("colors_0 = o.colors_0;\n" "colors_1 = o.colors_1;\n"); } if (host_config.backend_depth_clamp) { out.Write("gl_ClipDistance[0] = clipDist0;\n" "gl_ClipDistance[1] = clipDist1;\n"); } // Vulkan NDC space has Y pointing down (right-handed NDC space). if (api_type == APIType::Vulkan) out.Write("gl_Position = float4(o.pos.x, -o.pos.y, o.pos.z, o.pos.w);\n"); else out.Write("gl_Position = o.pos;\n"); } else // D3D { out.Write("return o;\n"); } out.Write("}}\n"); return out; } static void GenVertexShaderTexGens(APIType api_type, u32 num_texgen, ShaderCode& out) { // The HLSL compiler complains that the output texture coordinates are uninitialized when trying // to dynamically index them. for (u32 i = 0; i < num_texgen; i++) out.Write("o.tex{} = float3(0.0, 0.0, 0.0);\n", i); out.Write("// Texture coordinate generation\n"); if (num_texgen == 1) { out.Write("{{ const uint texgen = 0u;\n"); } else { out.Write("{}for (uint texgen = 0u; texgen < {}u; texgen++) {{\n", api_type == APIType::D3D ? "[loop] " : "", num_texgen); } out.Write(" // Texcoord transforms\n"); out.Write(" float4 coord = float4(0.0, 0.0, 1.0, 1.0);\n" " uint texMtxInfo = xfmem_texMtxInfo(texgen);\n"); out.Write(" switch ({}) {{\n", BitfieldExtract<&TexMtxInfo::sourcerow>("texMtxInfo")); out.Write(" case {:s}:\n", SourceRow::Geom); out.Write(" coord.xyz = rawpos.xyz;\n"); out.Write(" break;\n\n"); out.Write(" case {:s}:\n", SourceRow::Normal); out.Write( " coord.xyz = ((components & {}u /* VB_HAS_NRM0 */) != 0u) ? rawnorm0.xyz : coord.xyz;", VB_HAS_NRM0); out.Write(" break;\n\n"); out.Write(" case {:s}:\n", SourceRow::BinormalT); out.Write( " coord.xyz = ((components & {}u /* VB_HAS_NRM1 */) != 0u) ? rawnorm1.xyz : coord.xyz;", VB_HAS_NRM1); out.Write(" break;\n\n"); out.Write(" case {:s}:\n", SourceRow::BinormalB); out.Write( " coord.xyz = ((components & {}u /* VB_HAS_NRM2 */) != 0u) ? rawnorm2.xyz : coord.xyz;", VB_HAS_NRM2); out.Write(" break;\n\n"); for (u32 i = 0; i < 8; i++) { out.Write(" case {:s}:\n", static_cast(static_cast(SourceRow::Tex0) + i)); out.Write( " coord = ((components & {}u /* VB_HAS_UV{} */) != 0u) ? float4(rawtex{}.x, rawtex{}.y, " "1.0, 1.0) : coord;\n", VB_HAS_UV0 << i, i, i, i); out.Write(" break;\n\n"); } out.Write(" }}\n" "\n"); out.Write(" // Input form of AB11 sets z element to 1.0\n"); out.Write(" if ({} == {:s}) // inputform == AB11\n", BitfieldExtract<&TexMtxInfo::inputform>("texMtxInfo"), TexInputForm::AB11); out.Write(" coord.z = 1.0f;\n" "\n"); // Convert NaNs to 1 - needed to fix eyelids in Shadow the Hedgehog during cutscenes // See https://bugs.dolphin-emu.org/issues/11458 out.Write(" // Convert NaN to 1\n"); out.Write(" if (dolphin_isnan(coord.x)) coord.x = 1.0;\n"); out.Write(" if (dolphin_isnan(coord.y)) coord.y = 1.0;\n"); out.Write(" if (dolphin_isnan(coord.z)) coord.z = 1.0;\n"); out.Write(" // first transformation\n"); out.Write(" uint texgentype = {};\n", BitfieldExtract<&TexMtxInfo::texgentype>("texMtxInfo")); out.Write(" float3 output_tex;\n" " switch (texgentype)\n" " {{\n"); out.Write(" case {:s}:\n", TexGenType::EmbossMap); out.Write(" {{\n"); out.Write(" uint light = {};\n", BitfieldExtract<&TexMtxInfo::embosslightshift>("texMtxInfo")); out.Write(" uint source = {};\n", BitfieldExtract<&TexMtxInfo::embosssourceshift>("texMtxInfo")); out.Write(" switch (source) {{\n"); for (u32 i = 0; i < num_texgen; i++) out.Write(" case {}u: output_tex.xyz = o.tex{}; break;\n", i, i); out.Write(" default: output_tex.xyz = float3(0.0, 0.0, 0.0); break;\n" " }}\n"); out.Write(" if ((components & {}u) != 0u) {{ // VB_HAS_NRM1 | VB_HAS_NRM2\n", VB_HAS_NRM1 | VB_HAS_NRM2); // Should this be VB_HAS_NRM1 | VB_HAS_NRM2 out.Write(" float3 ldir = normalize(" I_LIGHTS "[light].pos.xyz - pos.xyz);\n" " output_tex.xyz += float3(dot(ldir, _norm1), dot(ldir, _norm2), 0.0);\n" " }}\n" " }}\n" " break;\n\n"); out.Write(" case {:s}:\n", TexGenType::Color0); out.Write(" output_tex.xyz = float3(o.colors_0.x, o.colors_0.y, 1.0);\n" " break;\n\n"); out.Write(" case {:s}:\n", TexGenType::Color1); out.Write(" output_tex.xyz = float3(o.colors_1.x, o.colors_1.y, 1.0);\n" " break;\n\n"); out.Write(" case {:s}:\n", TexGenType::Regular); out.Write(" default:\n" " {{\n"); out.Write(" if ((components & ({}u /* VB_HAS_TEXMTXIDX0 */ << texgen)) != 0u) {{\n", VB_HAS_TEXMTXIDX0); out.Write(" // This is messy, due to dynamic indexing of the input texture coordinates.\n" " // Hopefully the compiler will unroll this whole loop anyway and the switch.\n" " int tmp = 0;\n" " switch (texgen) {{\n"); for (u32 i = 0; i < num_texgen; i++) out.Write(" case {}u: tmp = int(rawtex{}.z); break;\n", i, i); out.Write(" }}\n" "\n"); out.Write(" if ({} == {:s}) {{\n", BitfieldExtract<&TexMtxInfo::projection>("texMtxInfo"), TexSize::STQ); out.Write(" output_tex.xyz = float3(dot(coord, " I_TRANSFORMMATRICES "[tmp]),\n" " dot(coord, " I_TRANSFORMMATRICES "[tmp + 1]),\n" " dot(coord, " I_TRANSFORMMATRICES "[tmp + 2]));\n" " }} else {{\n" " output_tex.xyz = float3(dot(coord, " I_TRANSFORMMATRICES "[tmp]),\n" " dot(coord, " I_TRANSFORMMATRICES "[tmp + 1]),\n" " 1.0);\n" " }}\n" " }} else {{\n"); out.Write(" if ({} == {:s}) {{\n", BitfieldExtract<&TexMtxInfo::projection>("texMtxInfo"), TexSize::STQ); out.Write(" output_tex.xyz = float3(dot(coord, " I_TEXMATRICES "[3u * texgen]),\n" " dot(coord, " I_TEXMATRICES "[3u * texgen + 1u]),\n" " dot(coord, " I_TEXMATRICES "[3u * texgen + 2u]));\n" " }} else {{\n" " output_tex.xyz = float3(dot(coord, " I_TEXMATRICES "[3u * texgen]),\n" " dot(coord, " I_TEXMATRICES "[3u * texgen + 1u]),\n" " 1.0);\n" " }}\n" " }}\n" " }}\n" " break;\n\n" " }}\n" "\n"); out.Write(" if (xfmem_dualTexInfo != 0u) {{\n"); out.Write(" uint postMtxInfo = xfmem_postMtxInfo(texgen);"); out.Write(" uint base_index = {};\n", BitfieldExtract<&PostMtxInfo::index>("postMtxInfo")); out.Write(" float4 P0 = " I_POSTTRANSFORMMATRICES "[base_index & 0x3fu];\n" " float4 P1 = " I_POSTTRANSFORMMATRICES "[(base_index + 1u) & 0x3fu];\n" " float4 P2 = " I_POSTTRANSFORMMATRICES "[(base_index + 2u) & 0x3fu];\n" "\n"); out.Write(" if ({} != 0u)\n", BitfieldExtract<&PostMtxInfo::normalize>("postMtxInfo")); out.Write(" output_tex.xyz = normalize(output_tex.xyz);\n" "\n" " // multiply by postmatrix\n" " output_tex.xyz = float3(dot(P0.xyz, output_tex.xyz) + P0.w,\n" " dot(P1.xyz, output_tex.xyz) + P1.w,\n" " dot(P2.xyz, output_tex.xyz) + P2.w);\n" " }}\n\n"); // When q is 0, the GameCube appears to have a special case // This can be seen in devkitPro's neheGX Lesson08 example for Wii // Makes differences in Rogue Squadron 3 (Hoth sky) and The Last Story (shadow culling) out.Write(" if (texgentype == {:s} && output_tex.z == 0.0)\n", TexGenType::Regular); out.Write( " output_tex.xy = clamp(output_tex.xy / 2.0f, float2(-1.0f,-1.0f), float2(1.0f,1.0f));\n" "\n"); out.Write(" // Hopefully GPUs that can support dynamic indexing will optimize this.\n"); out.Write(" switch (texgen) {{\n"); for (u32 i = 0; i < num_texgen; i++) out.Write(" case {}u: o.tex{} = output_tex; break;\n", i, i); out.Write(" }}\n" "}}\n"); } void EnumerateVertexShaderUids(const std::function& callback) { VertexShaderUid uid; for (u32 texgens = 0; texgens <= 8; texgens++) { vertex_ubershader_uid_data* const vuid = uid.GetUidData(); vuid->num_texgens = texgens; callback(uid); } } } // namespace UberShader