mirror of
https://github.com/KhronosGroup/Vulkan-Hpp.git
synced 2024-10-14 16:32:17 +00:00
91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
// Copyright(c) 2019, NVIDIA CORPORATION. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#include "shaders.hpp"
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#include "vulkan/vulkan.hpp"
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#include "StandAlone/ResourceLimits.h"
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#include "SPIRV/GlslangToSpv.h"
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namespace vk
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{
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namespace su
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{
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EShLanguage translateShaderStage(vk::ShaderStageFlagBits stage)
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{
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switch (stage)
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{
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case vk::ShaderStageFlagBits::eVertex: return EShLangVertex;
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case vk::ShaderStageFlagBits::eTessellationControl: return EShLangTessControl;
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case vk::ShaderStageFlagBits::eTessellationEvaluation: return EShLangTessEvaluation;
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case vk::ShaderStageFlagBits::eGeometry: return EShLangGeometry;
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case vk::ShaderStageFlagBits::eFragment: return EShLangFragment;
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case vk::ShaderStageFlagBits::eCompute: return EShLangCompute;
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default:
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assert(false && "Unknown shader stage");
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return EShLangVertex;
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}
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}
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bool GLSLtoSPV(const vk::ShaderStageFlagBits shaderType, std::string const& glslShader, std::vector<unsigned int> &spvShader)
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{
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EShLanguage stage = translateShaderStage(shaderType);
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const char *shaderStrings[1];
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shaderStrings[0] = glslShader.data();
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glslang::TShader shader(stage);
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shader.setStrings(shaderStrings, 1);
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// Enable SPIR-V and Vulkan rules when parsing GLSL
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EShMessages messages = (EShMessages)(EShMsgSpvRules | EShMsgVulkanRules);
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if (!shader.parse(&glslang::DefaultTBuiltInResource, 100, false, messages))
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{
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puts(shader.getInfoLog());
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puts(shader.getInfoDebugLog());
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return false; // something didn't work
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}
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glslang::TProgram program;
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program.addShader(&shader);
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//
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// Program-level processing...
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//
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if (!program.link(messages))
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{
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puts(shader.getInfoLog());
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puts(shader.getInfoDebugLog());
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fflush(stdout);
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return false;
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}
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glslang::GlslangToSpv(*program.getIntermediate(stage), spvShader);
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return true;
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}
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vk::UniqueShaderModule createShaderModule(vk::UniqueDevice &device, vk::ShaderStageFlagBits shaderStage, std::string const& shaderText)
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{
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std::vector<unsigned int> shaderSPV;
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bool ok = GLSLtoSPV(shaderStage, shaderText, shaderSPV);
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assert(ok);
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return device->createShaderModuleUnique(vk::ShaderModuleCreateInfo(vk::ShaderModuleCreateFlags(), shaderSPV.size() * sizeof(unsigned int), shaderSPV.data()));
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}
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}
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}
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