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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "shader_recompiler/backend/bindings.h"
#include "shader_recompiler/backend/glsl/emit_context.h"
#include "shader_recompiler/frontend/ir/program.h"
namespace Shader::Backend::GLSL {
EmitContext::EmitContext(IR::Program& program, [[maybe_unused]] Bindings& bindings,
const Profile& profile_)
: info{program.info}, profile{profile_} {
std::string header = "#version 450\n";
SetupExtensions(header);
if (program.stage == Stage::Compute) {
header += fmt::format("layout(local_size_x={},local_size_y={},local_size_z={}) in;\n",
program.workgroup_size[0], program.workgroup_size[1],
program.workgroup_size[2]);
}
code += header;
DefineConstantBuffers();
DefineStorageBuffers();
DefineHelperFunctions();
code += "void main(){\n";
}
void EmitContext::SetupExtensions(std::string& header) {
if (info.uses_int64) {
header += "#extension GL_ARB_gpu_shader_int64 : enable\n";
}
if (info.uses_int64_bit_atomics) {
header += "#extension GL_NV_shader_atomic_int64 : enable\n";
}
if (info.uses_atomic_f32_add) {
header += "#extension GL_NV_shader_atomic_float : enable\n";
}
if (info.uses_atomic_f16x2_add || info.uses_atomic_f16x2_min || info.uses_atomic_f16x2_max) {
header += "#extension NV_shader_atomic_fp16_vector : enable\n";
}
}
void EmitContext::DefineConstantBuffers() {
if (info.constant_buffer_descriptors.empty()) {
return;
}
u32 binding{};
for (const auto& desc : info.constant_buffer_descriptors) {
Add("layout(std140,binding={}) uniform cbuf_{}{{vec4 cbuf{}[{}];}};", binding, binding,
desc.index, 4 * 1024);
++binding;
}
}
void EmitContext::DefineStorageBuffers() {
if (info.storage_buffers_descriptors.empty()) {
return;
}
u32 binding{};
for (const auto& desc : info.storage_buffers_descriptors) {
if (info.uses_s32_atomics) {
Add("layout(std430,binding={}) buffer ssbo_{}_s32{{int ssbo{}_s32[];}};", binding,
binding, desc.cbuf_index, desc.count);
}
if (True(info.used_storage_buffer_types & IR::Type::U32)) {
Add("layout(std430,binding={}) buffer ssbo_{}_u32{{uint ssbo{}_u32[];}};", binding,
binding, desc.cbuf_index, desc.count);
}
if (True(info.used_storage_buffer_types & IR::Type::F32)) {
Add("layout(std430,binding={}) buffer ssbo_{}_f32{{float ssbo{}_f32[];}};", binding,
binding, desc.cbuf_index, desc.count);
}
if (True(info.used_storage_buffer_types & IR::Type::U32x2)) {
Add("layout(std430,binding={}) buffer ssbo_{}_u32x2{{uvec2 ssbo{}_u32x2[];}};", binding,
binding, desc.cbuf_index, desc.count);
}
if (True(info.used_storage_buffer_types & IR::Type::U64) ||
True(info.used_storage_buffer_types & IR::Type::F64)) {
Add("layout(std430,binding={}) buffer ssbo_{}_u64{{uint64_t ssbo{}_u64[];}};", binding,
binding, desc.cbuf_index, desc.count);
}
++binding;
}
}
void EmitContext::DefineHelperFunctions() {
if (info.uses_global_increment) {
code += "uint CasIncrement(uint op_a,uint op_b){return(op_a>=op_b)?0u:(op_a+1u);}\n";
}
if (info.uses_global_decrement) {
code +=
"uint CasDecrement(uint op_a,uint op_b){return(op_a==0||op_a>op_b)?op_b:(op_a-1u);}\n";
}
}
} // namespace Shader::Backend::GLSL
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