262 lines
9.9 KiB
C++
262 lines
9.9 KiB
C++
// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "shader_recompiler/backend/bindings.h"
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#include "shader_recompiler/backend/glsl/emit_context.h"
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#include "shader_recompiler/frontend/ir/program.h"
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#include "shader_recompiler/profile.h"
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namespace Shader::Backend::GLSL {
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namespace {
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std::string_view InterpDecorator(Interpolation interp) {
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switch (interp) {
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case Interpolation::Smooth:
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return "";
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case Interpolation::Flat:
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return "flat";
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case Interpolation::NoPerspective:
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return "noperspective";
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}
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throw InvalidArgument("Invalid interpolation {}", interp);
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}
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std::string_view SamplerType(TextureType type, bool is_depth) {
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if (is_depth) {
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switch (type) {
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case TextureType::Color1D:
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return "sampler1DShadow";
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case TextureType::ColorArray1D:
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return "sampler1DArrayShadow";
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case TextureType::Color2D:
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return "sampler2DShadow";
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case TextureType::ColorArray2D:
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return "sampler2DArrayShadow";
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case TextureType::ColorCube:
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return "samplerCubeShadow";
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case TextureType::ColorArrayCube:
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return "samplerCubeArrayShadow";
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default:
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fmt::print("Texture type: {}", type);
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throw NotImplementedException("Texture type: {}", type);
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}
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}
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switch (type) {
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case TextureType::Color1D:
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return "sampler1D";
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case TextureType::ColorArray1D:
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return "sampler1DArray";
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case TextureType::Color2D:
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return "sampler2D";
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case TextureType::ColorArray2D:
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return "sampler2DArray";
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case TextureType::Color3D:
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return "sampler3D";
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case TextureType::ColorCube:
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return "samplerCube";
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case TextureType::ColorArrayCube:
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return "samplerCubeArray";
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case TextureType::Buffer:
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return "samplerBuffer";
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default:
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fmt::print("Texture type: {}", type);
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throw NotImplementedException("Texture type: {}", type);
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}
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}
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} // namespace
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EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile& profile_,
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const RuntimeInfo& runtime_info_)
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: info{program.info}, profile{profile_}, runtime_info{runtime_info_} {
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SetupExtensions(header);
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stage = program.stage;
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switch (program.stage) {
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case Stage::VertexA:
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case Stage::VertexB:
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stage_name = "vs";
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// TODO: add only what's used by the shader
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header +=
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"out gl_PerVertex {vec4 gl_Position;float gl_PointSize;float gl_ClipDistance[];};";
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break;
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case Stage::TessellationControl:
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case Stage::TessellationEval:
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stage_name = "ts";
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break;
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case Stage::Geometry:
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stage_name = "gs";
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break;
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case Stage::Fragment:
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stage_name = "fs";
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break;
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case Stage::Compute:
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stage_name = "cs";
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header += fmt::format("layout(local_size_x={},local_size_y={},local_size_z={}) in;\n",
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program.workgroup_size[0], program.workgroup_size[1],
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program.workgroup_size[2]);
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break;
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}
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const std::string_view attr_stage{stage == Stage::Fragment ? "fragment" : "vertex"};
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for (size_t index = 0; index < info.input_generics.size(); ++index) {
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const auto& generic{info.input_generics[index]};
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if (generic.used) {
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header += fmt::format("layout(location={}) {} in vec4 in_attr{};", index,
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InterpDecorator(generic.interpolation), index);
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}
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}
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for (size_t index = 0; index < info.stores_frag_color.size(); ++index) {
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if (!info.stores_frag_color[index]) {
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continue;
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}
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header += fmt::format("layout(location={})out vec4 frag_color{};", index, index);
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}
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for (size_t index = 0; index < info.stores_generics.size(); ++index) {
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if (info.stores_generics[index]) {
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header += fmt::format("layout(location={}) out vec4 out_attr{};", index, index);
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}
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}
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DefineConstantBuffers(bindings);
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DefineStorageBuffers(bindings);
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SetupImages(bindings);
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DefineHelperFunctions();
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header += "void main(){\n";
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if (stage == Stage::VertexA || stage == Stage::VertexB) {
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Add("gl_Position = vec4(0.0f, 0.0f, 0.0f, 1.0f);");
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}
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}
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void EmitContext::SetupExtensions(std::string&) {
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header += "#extension GL_ARB_separate_shader_objects : enable\n";
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header += "#extension GL_ARB_sparse_texture2 : enable\n";
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header += "#extension GL_EXT_texture_shadow_lod : enable\n";
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// header += "#extension GL_ARB_texture_cube_map_array : enable\n";
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if (info.uses_int64) {
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header += "#extension GL_ARB_gpu_shader_int64 : enable\n";
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}
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if (info.uses_int64_bit_atomics) {
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header += "#extension GL_NV_shader_atomic_int64 : enable\n";
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}
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if (info.uses_atomic_f32_add) {
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header += "#extension GL_NV_shader_atomic_float : enable\n";
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}
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if (info.uses_atomic_f16x2_add || info.uses_atomic_f16x2_min || info.uses_atomic_f16x2_max) {
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header += "#extension NV_shader_atomic_fp16_vector : enable\n";
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}
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if (info.uses_fp16) {
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if (profile.support_gl_nv_gpu_shader_5) {
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header += "#extension GL_NV_gpu_shader5 : enable\n";
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}
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if (profile.support_gl_amd_gpu_shader_half_float) {
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header += "#extension GL_AMD_gpu_shader_half_float : enable\n";
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}
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}
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if (info.uses_subgroup_invocation_id || info.uses_subgroup_mask || info.uses_subgroup_vote ||
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info.uses_subgroup_shuffles || info.uses_fswzadd) {
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header += "#extension GL_ARB_shader_ballot : enable\n";
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}
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}
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void EmitContext::DefineConstantBuffers(Bindings& bindings) {
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if (info.constant_buffer_descriptors.empty()) {
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return;
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}
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for (const auto& desc : info.constant_buffer_descriptors) {
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header += fmt::format(
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"layout(std140,binding={}) uniform {}_cbuf_{}{{vec4 {}_cbuf{}[{}];}};",
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bindings.uniform_buffer, stage_name, desc.index, stage_name, desc.index, 4 * 1024);
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bindings.uniform_buffer += desc.count;
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}
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}
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void EmitContext::DefineStorageBuffers(Bindings& bindings) {
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if (info.storage_buffers_descriptors.empty()) {
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return;
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}
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for (const auto& desc : info.storage_buffers_descriptors) {
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header += fmt::format("layout(std430,binding={}) buffer ssbo_{}{{uint ssbo{}[];}};",
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bindings.storage_buffer, bindings.storage_buffer, desc.cbuf_index);
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bindings.storage_buffer += desc.count;
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}
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}
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void EmitContext::DefineHelperFunctions() {
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if (info.uses_global_increment) {
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header += "uint CasIncrement(uint op_a,uint op_b){return(op_a>=op_b)?0u:(op_a+1u);}\n";
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}
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if (info.uses_global_decrement) {
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header +=
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"uint CasDecrement(uint op_a,uint op_b){return(op_a==0||op_a>op_b)?op_b:(op_a-1u);}\n";
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}
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if (info.uses_atomic_f32_add) {
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header += "uint CasFloatAdd(uint op_a,float op_b){return "
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"floatBitsToUint(uintBitsToFloat(op_a)+op_b);}\n";
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}
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if (info.uses_atomic_f32x2_add) {
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header += "uint CasFloatAdd32x2(uint op_a,vec2 op_b){return "
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"packHalf2x16(unpackHalf2x16(op_a)+op_b);}\n";
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}
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if (info.uses_atomic_f32x2_min) {
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header += "uint CasFloatMin32x2(uint op_a,vec2 op_b){return "
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"packHalf2x16(min(unpackHalf2x16(op_a),op_b));}\n";
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}
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if (info.uses_atomic_f32x2_max) {
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header += "uint CasFloatMax32x2(uint op_a,vec2 op_b){return "
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"packHalf2x16(max(unpackHalf2x16(op_a),op_b));}\n";
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}
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if (info.uses_atomic_f16x2_add) {
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header += "uint CasFloatAdd16x2(uint op_a,f16vec2 op_b){return "
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"packFloat2x16(unpackFloat2x16(op_a)+op_b);}\n";
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}
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if (info.uses_atomic_f16x2_min) {
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header += "uint CasFloatMin16x2(uint op_a,f16vec2 op_b){return "
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"packFloat2x16(min(unpackFloat2x16(op_a),op_b));}\n";
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}
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if (info.uses_atomic_f16x2_max) {
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header += "uint CasFloatMax16x2(uint op_a,f16vec2 op_b){return "
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"packFloat2x16(max(unpackFloat2x16(op_a),op_b));}\n";
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}
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if (info.uses_atomic_s32_min) {
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header += "uint CasMinS32(uint op_a,uint op_b){return uint(min(int(op_a),int(op_b)));}";
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}
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if (info.uses_atomic_s32_max) {
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header += "uint CasMaxS32(uint op_a,uint op_b){return uint(max(int(op_a),int(op_b)));}";
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}
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}
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void EmitContext::SetupImages(Bindings& bindings) {
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image_buffer_bindings.reserve(info.image_buffer_descriptors.size());
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for (const auto& desc : info.image_buffer_descriptors) {
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throw NotImplementedException("image_buffer_descriptors");
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image_buffer_bindings.push_back(bindings.image);
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bindings.image += desc.count;
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}
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image_bindings.reserve(info.image_descriptors.size());
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for (const auto& desc : info.image_descriptors) {
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throw NotImplementedException("image_bindings");
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image_bindings.push_back(bindings.image);
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bindings.image += desc.count;
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}
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texture_buffer_bindings.reserve(info.texture_buffer_descriptors.size());
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for (const auto& desc : info.texture_buffer_descriptors) {
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throw NotImplementedException("TextureType::Buffer");
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texture_buffer_bindings.push_back(bindings.texture);
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bindings.texture += desc.count;
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}
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texture_bindings.reserve(info.texture_descriptors.size());
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for (const auto& desc : info.texture_descriptors) {
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const auto sampler_type{SamplerType(desc.type, desc.is_depth)};
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texture_bindings.push_back(bindings.texture);
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const auto indices{bindings.texture + desc.count};
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for (u32 index = bindings.texture; index < indices; ++index) {
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header += fmt::format("layout(binding={}) uniform {} tex{};", bindings.texture,
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sampler_type, index);
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}
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bindings.texture += desc.count;
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}
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}
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} // namespace Shader::Backend::GLSL
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