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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <string_view>
#include "shader_recompiler/backend/glsl/emit_context.h"
#include "shader_recompiler/backend/glsl/emit_glsl_instructions.h"
#include "shader_recompiler/frontend/ir/value.h"
#include "shader_recompiler/profile.h"
namespace Shader::Backend::GLSL {
static constexpr std::string_view SWIZZLE{"xyzw"};
void EmitGetCbufU8([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] const IR::Value& binding,
[[maybe_unused]] const IR::Value& offset) {
throw NotImplementedException("GLSL");
}
void EmitGetCbufS8([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] const IR::Value& binding,
[[maybe_unused]] const IR::Value& offset) {
throw NotImplementedException("GLSL");
}
void EmitGetCbufU16([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] const IR::Value& binding,
[[maybe_unused]] const IR::Value& offset) {
throw NotImplementedException("GLSL");
}
void EmitGetCbufS16([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] const IR::Value& binding,
[[maybe_unused]] const IR::Value& offset) {
throw NotImplementedException("GLSL");
}
void EmitGetCbufU32(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding,
const IR::Value& offset) {
const auto u32_offset{offset.U32()};
const auto index{(u32_offset / 4) % 4};
ctx.AddU32("{}=floatBitsToUint(cbuf{}[{}].{});", inst, binding.U32(), u32_offset / 16,
SWIZZLE[index]);
}
void EmitGetCbufF32(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding,
const IR::Value& offset) {
const auto u32_offset{offset.U32()};
const auto index{(u32_offset / 4) % 4};
ctx.AddF32("{}=cbuf{}[{}].{};", inst, binding.U32(), u32_offset / 16, SWIZZLE[index]);
}
void EmitGetCbufU32x2([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] const IR::Value& binding,
[[maybe_unused]] const IR::Value& offset) {
throw NotImplementedException("GLSL");
}
void EmitGetAttribute(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr,
[[maybe_unused]] std::string_view vertex) {
const u32 element{static_cast<u32>(attr) % 4};
const char swizzle{"xyzw"[element]};
if (IR::IsGeneric(attr)) {
const u32 index{IR::GenericAttributeIndex(attr)};
ctx.AddF32("{}=in_attr{}.{};", inst, index, swizzle);
return;
}
switch (attr) {
case IR::Attribute::PositionX:
case IR::Attribute::PositionY:
case IR::Attribute::PositionZ:
case IR::Attribute::PositionW:
ctx.AddF32("{}=gl_Position.{};", inst, swizzle);
break;
default:
fmt::print("Get attribute {}", attr);
throw NotImplementedException("Get attribute {}", attr);
}
}
void EmitSetAttribute(EmitContext& ctx, IR::Attribute attr, std::string_view value,
[[maybe_unused]] std::string_view vertex) {
const u32 element{static_cast<u32>(attr) % 4};
const char swizzle{"xyzw"[element]};
if (IR::IsGeneric(attr)) {
const u32 index{IR::GenericAttributeIndex(attr)};
ctx.Add("out_attr{}.{}={};", index, swizzle, value);
return;
}
switch (attr) {
case IR::Attribute::PointSize:
ctx.Add("gl_Pointsize={};", value);
break;
case IR::Attribute::PositionX:
case IR::Attribute::PositionY:
case IR::Attribute::PositionZ:
case IR::Attribute::PositionW:
ctx.Add("gl_Position.{}={};", swizzle, value);
break;
default:
fmt::print("Set attribute {}", attr);
throw NotImplementedException("Set attribute {}", attr);
}
}
void EmitSetFragColor(EmitContext& ctx, u32 index, u32 component, std::string_view value) {
const char swizzle{"xyzw"[component]};
ctx.Add("frag_color{}.{}={};", index, swizzle, value);
}
} // namespace Shader::Backend::GLSL
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