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glsl: Conditionally use fine/coarse derivatives based on device support

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This commit is contained in:
ameerj 2021-06-14 23:33:26 -04:00
parent 6eea88d614
commit 3b339fbbf6
4 changed files with 29 additions and 4 deletions
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3
src/shader_recompiler/backend/glsl/emit_context.cpp
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@ -395,6 +395,9 @@ void EmitContext::SetupExtensions() {
if (info.uses_typeless_image_reads || info.uses_typeless_image_writes) {
header += "#extension GL_EXT_shader_image_load_formatted : enable\n";
}
if (info.uses_derivatives && profile.support_gl_derivative_control) {
header += "#extension GL_ARB_derivative_control : enable\n";
}
}
void EmitContext::DefineConstantBuffers(Bindings& bindings) {

20
src/shader_recompiler/backend/glsl/emit_glsl_warp.cpp
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@ -180,18 +180,38 @@ void EmitFSwizzleAdd(EmitContext& ctx, IR::Inst& inst, std::string_view op_a, st
}
void EmitDPdxFine(EmitContext& ctx, IR::Inst& inst, std::string_view op_a) {
if (ctx.profile.support_gl_derivative_control) {
ctx.AddF32("{}=dFdxFine({});", inst, op_a);
} else {
LOG_WARNING(Shader_GLSL, "Device does not support dFdxFine, fallback to dFdx");
ctx.AddF32("{}=dFdx({});", inst, op_a);
}
}
void EmitDPdyFine(EmitContext& ctx, IR::Inst& inst, std::string_view op_a) {
if (ctx.profile.support_gl_derivative_control) {
ctx.AddF32("{}=dFdyFine({});", inst, op_a);
} else {
LOG_WARNING(Shader_GLSL, "Device does not support dFdyFine, fallback to dFdy");
ctx.AddF32("{}=dFdy({});", inst, op_a);
}
}
void EmitDPdxCoarse(EmitContext& ctx, IR::Inst& inst, std::string_view op_a) {
if (ctx.profile.support_gl_derivative_control) {
ctx.AddF32("{}=dFdxCoarse({});", inst, op_a);
} else {
LOG_WARNING(Shader_GLSL, "Device does not support dFdxCoarse, fallback to dFdx");
ctx.AddF32("{}=dFdx({});", inst, op_a);
}
}
void EmitDPdyCoarse(EmitContext& ctx, IR::Inst& inst, std::string_view op_a) {
if (ctx.profile.support_gl_derivative_control) {
ctx.AddF32("{}=dFdyCoarse({});", inst, op_a);
} else {
LOG_WARNING(Shader_GLSL, "Device does not support dFdyCoarse, fallback to dFdy");
ctx.AddF32("{}=dFdy({});", inst, op_a);
}
}
} // namespace Shader::Backend::GLSL

1
src/shader_recompiler/profile.h
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@ -89,6 +89,7 @@ struct Profile {
bool support_gl_warp_intrinsics{};
bool support_gl_variable_aoffi{};
bool support_gl_sparse_textures{};
bool support_gl_derivative_control{};
bool warp_size_potentially_larger_than_guest{};

1
src/video_core/renderer_opengl/gl_shader_cache.cpp
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@ -187,6 +187,7 @@ ShaderCache::ShaderCache(RasterizerOpenGL& rasterizer_, Core::Frontend::EmuWindo
.support_gl_warp_intrinsics = false,
.support_gl_variable_aoffi = device.HasVariableAoffi(),
.support_gl_sparse_textures = device.HasSparseTexture2(),
.support_gl_derivative_control = device.HasDerivativeControl(),
.warp_size_potentially_larger_than_guest = device.IsWarpSizePotentiallyLargerThanGuest(),