forked from dolphin-emu/dolphin
340 lines
16 KiB
C++
340 lines
16 KiB
C++
// Copyright 2016 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "VideoBackends/Vulkan/ShaderCompiler.h"
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#include <cstddef>
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#include <cstdlib>
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#include <fstream>
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#include <memory>
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#include <string>
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// glslang includes
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#include "GlslangToSpv.h"
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#include "ShaderLang.h"
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#include "disassemble.h"
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#include "Common/FileUtil.h"
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#include "Common/Logging/Log.h"
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#include "Common/MsgHandler.h"
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#include "Common/StringUtil.h"
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#include "VideoCommon/VideoConfig.h"
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namespace Vulkan
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{
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namespace ShaderCompiler
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{
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// Registers itself for cleanup via atexit
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bool InitializeGlslang();
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// Resource limits used when compiling shaders
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static const TBuiltInResource* GetCompilerResourceLimits();
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// Compile a shader to SPIR-V via glslang
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static bool CompileShaderToSPV(SPIRVCodeVector* out_code, EShLanguage stage,
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const char* stage_filename, const char* source_code,
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size_t source_code_length, bool prepend_header);
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// Regarding the UBO bind points, we subtract one from the binding index because
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// the OpenGL backend requires UBO #0 for non-block uniforms (at least on NV).
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// This allows us to share the same shaders but use bind point #0 in the Vulkan
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// backend. None of the Vulkan-specific shaders use UBOs, instead they use push
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// constants, so when/if the GL backend moves to uniform blocks completely this
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// subtraction can be removed.
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static const char SHADER_HEADER[] = R"(
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// Target GLSL 4.5.
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#version 450 core
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#define ATTRIBUTE_LOCATION(x) layout(location = x)
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#define FRAGMENT_OUTPUT_LOCATION(x) layout(location = x)
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#define FRAGMENT_OUTPUT_LOCATION_INDEXED(x, y) layout(location = x, index = y)
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#define UBO_BINDING(packing, x) layout(packing, set = 0, binding = (x - 1))
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#define SAMPLER_BINDING(x) layout(set = 1, binding = x)
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#define SSBO_BINDING(x) layout(set = 2, binding = x)
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#define TEXEL_BUFFER_BINDING(x) layout(set = 2, binding = x)
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#define VARYING_LOCATION(x) layout(location = x)
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#define FORCE_EARLY_Z layout(early_fragment_tests) in
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// hlsl to glsl function translation
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#define float2 vec2
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#define float3 vec3
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#define float4 vec4
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#define uint2 uvec2
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#define uint3 uvec3
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#define uint4 uvec4
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#define int2 ivec2
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#define int3 ivec3
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#define int4 ivec4
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#define frac fract
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#define lerp mix
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// These were changed in Vulkan
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#define gl_VertexID gl_VertexIndex
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#define gl_InstanceID gl_InstanceIndex
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)";
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bool CompileShaderToSPV(SPIRVCodeVector* out_code, EShLanguage stage, const char* stage_filename,
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const char* source_code, size_t source_code_length, bool prepend_header)
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{
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if (!InitializeGlslang())
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return false;
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std::unique_ptr<glslang::TShader> shader = std::make_unique<glslang::TShader>(stage);
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std::unique_ptr<glslang::TProgram> program;
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glslang::TShader::ForbidInclude includer;
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EProfile profile = ECoreProfile;
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EShMessages messages =
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static_cast<EShMessages>(EShMsgDefault | EShMsgSpvRules | EShMsgVulkanRules);
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int default_version = 450;
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std::string full_source_code;
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const char* pass_source_code = source_code;
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int pass_source_code_length = static_cast<int>(source_code_length);
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if (prepend_header)
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{
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full_source_code.reserve(sizeof(SHADER_HEADER) + source_code_length);
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full_source_code.append(SHADER_HEADER, sizeof(SHADER_HEADER) - 1);
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full_source_code.append(source_code, source_code_length);
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pass_source_code = full_source_code.c_str();
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pass_source_code_length = static_cast<int>(full_source_code.length());
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}
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shader->setStringsWithLengths(&pass_source_code, &pass_source_code_length, 1);
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auto DumpBadShader = [&](const char* msg) {
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static int counter = 0;
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std::string filename = StringFromFormat(
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"%sbad_%s_%04i.txt", File::GetUserPath(D_DUMP_IDX).c_str(), stage_filename, counter++);
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std::ofstream stream;
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OpenFStream(stream, filename, std::ios_base::out);
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if (stream.good())
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{
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stream << full_source_code << std::endl;
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stream << msg << std::endl;
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stream << "Shader Info Log:" << std::endl;
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stream << shader->getInfoLog() << std::endl;
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stream << shader->getInfoDebugLog() << std::endl;
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if (program)
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{
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stream << "Program Info Log:" << std::endl;
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stream << program->getInfoLog() << std::endl;
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stream << program->getInfoDebugLog() << std::endl;
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}
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}
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PanicAlert("%s (written to %s)", msg, filename.c_str());
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};
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if (!shader->parse(GetCompilerResourceLimits(), default_version, profile, false, true, messages,
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includer))
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{
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DumpBadShader("Failed to parse shader");
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return false;
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}
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// Even though there's only a single shader, we still need to link it to generate SPV
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program = std::make_unique<glslang::TProgram>();
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program->addShader(shader.get());
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if (!program->link(messages))
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{
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DumpBadShader("Failed to link program");
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return false;
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}
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glslang::TIntermediate* intermediate = program->getIntermediate(stage);
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if (!intermediate)
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{
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DumpBadShader("Failed to generate SPIR-V");
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return false;
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}
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spv::SpvBuildLogger logger;
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glslang::GlslangToSpv(*intermediate, *out_code, &logger);
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// Write out messages
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// Temporary: skip if it contains "Warning, version 450 is not yet complete; most version-specific
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// features are present, but some are missing."
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if (strlen(shader->getInfoLog()) > 108)
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WARN_LOG(VIDEO, "Shader info log: %s", shader->getInfoLog());
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if (strlen(shader->getInfoDebugLog()) > 0)
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WARN_LOG(VIDEO, "Shader debug info log: %s", shader->getInfoDebugLog());
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if (strlen(program->getInfoLog()) > 25)
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WARN_LOG(VIDEO, "Program info log: %s", program->getInfoLog());
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if (strlen(program->getInfoDebugLog()) > 0)
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WARN_LOG(VIDEO, "Program debug info log: %s", program->getInfoDebugLog());
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std::string spv_messages = logger.getAllMessages();
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if (!spv_messages.empty())
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WARN_LOG(VIDEO, "SPIR-V conversion messages: %s", spv_messages.c_str());
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// Dump source code of shaders out to file if enabled.
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if (g_ActiveConfig.iLog & CONF_SAVESHADERS)
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{
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static int counter = 0;
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std::string filename = StringFromFormat("%s%s_%04i.txt", File::GetUserPath(D_DUMP_IDX).c_str(),
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stage_filename, counter++);
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std::ofstream stream;
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OpenFStream(stream, filename, std::ios_base::out);
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if (stream.good())
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{
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stream << full_source_code << std::endl;
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stream << "Shader Info Log:" << std::endl;
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stream << shader->getInfoLog() << std::endl;
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stream << shader->getInfoDebugLog() << std::endl;
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stream << "Program Info Log:" << std::endl;
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stream << program->getInfoLog() << std::endl;
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stream << program->getInfoDebugLog() << std::endl;
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stream << "SPIR-V conversion messages: " << std::endl;
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stream << spv_messages;
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stream << "SPIR-V:" << std::endl;
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spv::Disassemble(stream, *out_code);
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}
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}
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return true;
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}
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bool InitializeGlslang()
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{
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static bool glslang_initialized = false;
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if (glslang_initialized)
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return true;
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if (!glslang::InitializeProcess())
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{
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PanicAlert("Failed to initialize glslang shader compiler");
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return false;
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}
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std::atexit([]() { glslang::FinalizeProcess(); });
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glslang_initialized = true;
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return true;
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}
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const TBuiltInResource* GetCompilerResourceLimits()
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{
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static const TBuiltInResource limits = {/* .MaxLights = */ 32,
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/* .MaxClipPlanes = */ 6,
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/* .MaxTextureUnits = */ 32,
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/* .MaxTextureCoords = */ 32,
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/* .MaxVertexAttribs = */ 64,
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/* .MaxVertexUniformComponents = */ 4096,
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/* .MaxVaryingFloats = */ 64,
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/* .MaxVertexTextureImageUnits = */ 32,
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/* .MaxCombinedTextureImageUnits = */ 80,
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/* .MaxTextureImageUnits = */ 32,
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/* .MaxFragmentUniformComponents = */ 4096,
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/* .MaxDrawBuffers = */ 32,
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/* .MaxVertexUniformVectors = */ 128,
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/* .MaxVaryingVectors = */ 8,
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/* .MaxFragmentUniformVectors = */ 16,
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/* .MaxVertexOutputVectors = */ 16,
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/* .MaxFragmentInputVectors = */ 15,
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/* .MinProgramTexelOffset = */ -8,
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/* .MaxProgramTexelOffset = */ 7,
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/* .MaxClipDistances = */ 8,
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/* .MaxComputeWorkGroupCountX = */ 65535,
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/* .MaxComputeWorkGroupCountY = */ 65535,
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/* .MaxComputeWorkGroupCountZ = */ 65535,
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/* .MaxComputeWorkGroupSizeX = */ 1024,
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/* .MaxComputeWorkGroupSizeY = */ 1024,
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/* .MaxComputeWorkGroupSizeZ = */ 64,
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/* .MaxComputeUniformComponents = */ 1024,
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/* .MaxComputeTextureImageUnits = */ 16,
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/* .MaxComputeImageUniforms = */ 8,
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/* .MaxComputeAtomicCounters = */ 8,
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/* .MaxComputeAtomicCounterBuffers = */ 1,
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/* .MaxVaryingComponents = */ 60,
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/* .MaxVertexOutputComponents = */ 64,
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/* .MaxGeometryInputComponents = */ 64,
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/* .MaxGeometryOutputComponents = */ 128,
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/* .MaxFragmentInputComponents = */ 128,
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/* .MaxImageUnits = */ 8,
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/* .MaxCombinedImageUnitsAndFragmentOutputs = */ 8,
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/* .MaxCombinedShaderOutputResources = */ 8,
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/* .MaxImageSamples = */ 0,
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/* .MaxVertexImageUniforms = */ 0,
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/* .MaxTessControlImageUniforms = */ 0,
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/* .MaxTessEvaluationImageUniforms = */ 0,
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/* .MaxGeometryImageUniforms = */ 0,
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/* .MaxFragmentImageUniforms = */ 8,
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/* .MaxCombinedImageUniforms = */ 8,
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/* .MaxGeometryTextureImageUnits = */ 16,
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/* .MaxGeometryOutputVertices = */ 256,
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/* .MaxGeometryTotalOutputComponents = */ 1024,
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/* .MaxGeometryUniformComponents = */ 1024,
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/* .MaxGeometryVaryingComponents = */ 64,
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/* .MaxTessControlInputComponents = */ 128,
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/* .MaxTessControlOutputComponents = */ 128,
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/* .MaxTessControlTextureImageUnits = */ 16,
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/* .MaxTessControlUniformComponents = */ 1024,
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/* .MaxTessControlTotalOutputComponents = */ 4096,
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/* .MaxTessEvaluationInputComponents = */ 128,
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/* .MaxTessEvaluationOutputComponents = */ 128,
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/* .MaxTessEvaluationTextureImageUnits = */ 16,
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/* .MaxTessEvaluationUniformComponents = */ 1024,
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/* .MaxTessPatchComponents = */ 120,
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/* .MaxPatchVertices = */ 32,
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/* .MaxTessGenLevel = */ 64,
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/* .MaxViewports = */ 16,
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/* .MaxVertexAtomicCounters = */ 0,
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/* .MaxTessControlAtomicCounters = */ 0,
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/* .MaxTessEvaluationAtomicCounters = */ 0,
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/* .MaxGeometryAtomicCounters = */ 0,
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/* .MaxFragmentAtomicCounters = */ 8,
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/* .MaxCombinedAtomicCounters = */ 8,
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/* .MaxAtomicCounterBindings = */ 1,
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/* .MaxVertexAtomicCounterBuffers = */ 0,
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/* .MaxTessControlAtomicCounterBuffers = */ 0,
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/* .MaxTessEvaluationAtomicCounterBuffers = */ 0,
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/* .MaxGeometryAtomicCounterBuffers = */ 0,
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/* .MaxFragmentAtomicCounterBuffers = */ 1,
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/* .MaxCombinedAtomicCounterBuffers = */ 1,
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/* .MaxAtomicCounterBufferSize = */ 16384,
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/* .MaxTransformFeedbackBuffers = */ 4,
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/* .MaxTransformFeedbackInterleavedComponents = */ 64,
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/* .MaxCullDistances = */ 8,
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/* .MaxCombinedClipAndCullDistances = */ 8,
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/* .MaxSamples = */ 4,
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/* .limits = */ {
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/* .nonInductiveForLoops = */ 1,
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/* .whileLoops = */ 1,
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/* .doWhileLoops = */ 1,
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/* .generalUniformIndexing = */ 1,
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/* .generalAttributeMatrixVectorIndexing = */ 1,
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/* .generalVaryingIndexing = */ 1,
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/* .generalSamplerIndexing = */ 1,
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/* .generalVariableIndexing = */ 1,
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/* .generalConstantMatrixVectorIndexing = */ 1,
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}};
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return &limits;
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}
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bool CompileVertexShader(SPIRVCodeVector* out_code, const char* source_code,
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size_t source_code_length, bool prepend_header)
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{
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return CompileShaderToSPV(out_code, EShLangVertex, "vs", source_code, source_code_length,
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prepend_header);
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}
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bool CompileGeometryShader(SPIRVCodeVector* out_code, const char* source_code,
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size_t source_code_length, bool prepend_header)
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{
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return CompileShaderToSPV(out_code, EShLangGeometry, "gs", source_code, source_code_length,
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prepend_header);
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}
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bool CompileFragmentShader(SPIRVCodeVector* out_code, const char* source_code,
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size_t source_code_length, bool prepend_header)
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{
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return CompileShaderToSPV(out_code, EShLangFragment, "ps", source_code, source_code_length,
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prepend_header);
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}
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} // namespace ShaderCompiler
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} // namespace Vulkan
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