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glsl: Implement legacy varyings

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This commit is contained in:
ameerj 2021-06-12 20:14:56 -04:00
parent ff3de0fb6b
commit 6aa1bf7b6f
6 changed files with 81 additions and 8 deletions
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43
src/shader_recompiler/backend/glsl/emit_context.cpp
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@ -200,6 +200,27 @@ std::string_view OutputPrimitive(OutputTopology topology) {
throw InvalidArgument("Invalid output topology {}", topology);
}
void SetupLegacyOutPerVertex(EmitContext& ctx, std::string& header) {
if (!ctx.info.stores_legacy_varyings) {
return;
}
if (ctx.info.stores_fixed_fnc_textures) {
header += "vec4 gl_TexCoord[8];";
}
if (ctx.info.stores_color_front_diffuse) {
header += "vec4 gl_FrontColor;";
}
if (ctx.info.stores_color_front_specular) {
header += "vec4 gl_FrontSecondaryColor;";
}
if (ctx.info.stores_color_back_diffuse) {
header += "vec4 gl_BackColor;";
}
if (ctx.info.stores_color_back_specular) {
header += "vec4 gl_BackSecondaryColor;";
}
}
void SetupOutPerVertex(EmitContext& ctx, std::string& header) {
if (!StoresPerVertexAttributes(ctx.stage)) {
return;
@ -215,18 +236,34 @@ void SetupOutPerVertex(EmitContext& ctx, std::string& header) {
ctx.stage != Stage::Geometry) {
header += "int gl_ViewportIndex;";
}
SetupLegacyOutPerVertex(ctx, header);
header += "};";
if (ctx.info.stores_viewport_index && ctx.stage == Stage::Geometry) {
header += "out int gl_ViewportIndex;";
}
}
void SetupLegacyInPerFragment(EmitContext& ctx, std::string& header) {
if (!ctx.info.loads_legacy_varyings) {
return;
}
header += "in gl_PerFragment{";
if (ctx.info.loads_fixed_fnc_textures) {
header += "vec4 gl_TexCoord[8];";
}
if (ctx.info.loads_color_front_diffuse) {
header += "vec4 gl_Color;";
}
header += "};";
}
} // Anonymous namespace
EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile& profile_,
const RuntimeInfo& runtime_info_)
: info{program.info}, profile{profile_}, runtime_info{runtime_info_} {
header += "#pragma optionNV(fastmath off)\n";
SetupExtensions(header);
SetupExtensions();
stage = program.stage;
switch (program.stage) {
case Stage::VertexA:
@ -271,6 +308,8 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
break;
}
SetupOutPerVertex(*this, header);
SetupLegacyInPerFragment(*this, header);
for (size_t index = 0; index < info.input_generics.size(); ++index) {
const auto& generic{info.input_generics[index]};
if (generic.used) {
@ -306,7 +345,7 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
DefineConstants();
}
void EmitContext::SetupExtensions(std::string&) {
void EmitContext::SetupExtensions() {
if (profile.support_gl_texture_shadow_lod) {
header += "#extension GL_EXT_texture_shadow_lod : enable\n";
}