SPIRV/CInterface/spirv_c_interface.cpp

   1 /**
   2     This code is based on the glslang_c_interface implementation by Viktor Latypov
   3 **/
   4
   5 /**
   6 BSD 2-Clause License
   7
   8 Copyright (c) 2019, Viktor Latypov
   9 All rights reserved.
  10
  11 Redistribution and use in source and binary forms, with or without
  12 modification, are permitted provided that the following conditions are met:
  13
  14 1. Redistributions of source code must retain the above copyright notice, this
  15    list of conditions and the following disclaimer.
  16
  17 2. Redistributions in binary form must reproduce the above copyright notice,
  18    this list of conditions and the following disclaimer in the documentation
  19    and/or other materials provided with the distribution.
  20
  21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  24 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  25 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  27 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31 **/
  32
  33 #include "glslang/Include/glslang_c_interface.h"
  34
  35 #include <cstring>
  36 #include "glslang/Public/ShaderLang.h"
  37 #include "SPIRV/GlslangToSpv.h"
  38 #include "SPIRV/Logger.h"
  39 #include "SPIRV/SpvTools.h"
  40
  41 static_assert(sizeof(glslang_spv_options_t) == sizeof(glslang::SpvOptions), "");
  42
  43 typedef struct glslang_program_s {
  44     glslang::TProgram* program;
  45     std::vector<unsigned int> spirv;
  46     std::string loggerMessages;
  47 } glslang_program_t;
  48
  49 static EShLanguage c_shader_stage(glslang_stage_t stage)
  50 {
  51     switch (stage) {
  52     case GLSLANG_STAGE_VERTEX:
  53         return EShLangVertex;
  54     case GLSLANG_STAGE_TESSCONTROL:
  55         return EShLangTessControl;
  56     case GLSLANG_STAGE_TESSEVALUATION:
  57         return EShLangTessEvaluation;
  58     case GLSLANG_STAGE_GEOMETRY:
  59         return EShLangGeometry;
  60     case GLSLANG_STAGE_FRAGMENT:
  61         return EShLangFragment;
  62     case GLSLANG_STAGE_COMPUTE:
  63         return EShLangCompute;
  64     case GLSLANG_STAGE_RAYGEN:
  65         return EShLangRayGen;
  66     case GLSLANG_STAGE_INTERSECT:
  67         return EShLangIntersect;
  68     case GLSLANG_STAGE_ANYHIT:
  69         return EShLangAnyHit;
  70     case GLSLANG_STAGE_CLOSESTHIT:
  71         return EShLangClosestHit;
  72     case GLSLANG_STAGE_MISS:
  73         return EShLangMiss;
  74     case GLSLANG_STAGE_CALLABLE:
  75         return EShLangCallable;
  76     case GLSLANG_STAGE_TASK:
  77         return EShLangTask;
  78     case GLSLANG_STAGE_MESH:
  79         return EShLangMesh;
  80     default:
  81         break;
  82     }
  83     return EShLangCount;
  84 }
  85
  86 GLSLANG_EXPORT void glslang_program_SPIRV_generate(glslang_program_t* program, glslang_stage_t stage)
  87 {
  88     glslang_spv_options_t spv_options {};
  89     spv_options.disable_optimizer = true;
  90     spv_options.validate = true;
  91
  92     glslang_program_SPIRV_generate_with_options(program, stage, &spv_options);
  93 }
  94
  95 GLSLANG_EXPORT void glslang_program_SPIRV_generate_with_options(glslang_program_t* program, glslang_stage_t stage, glslang_spv_options_t* spv_options) {
  96     spv::SpvBuildLogger logger;
  97
  98     const glslang::TIntermediate* intermediate = program->program->getIntermediate(c_shader_stage(stage));
  99
 100     program->spirv.clear();
 101
 102     glslang::GlslangToSpv(*intermediate, program->spirv, &logger, reinterpret_cast<glslang::SpvOptions*>(spv_options));
 103
 104     program->loggerMessages = logger.getAllMessages();
 105 }
 106
 107 GLSLANG_EXPORT size_t glslang_program_SPIRV_get_size(glslang_program_t* program) { return program->spirv.size(); }
 108
 109 GLSLANG_EXPORT void glslang_program_SPIRV_get(glslang_program_t* program, unsigned int* out)
 110 {
 111     memcpy(out, program->spirv.data(), program->spirv.size() * sizeof(unsigned int));
 112 }
 113
 114 GLSLANG_EXPORT unsigned int* glslang_program_SPIRV_get_ptr(glslang_program_t* program)
 115 {
 116     return program->spirv.data();
 117 }
 118
 119 GLSLANG_EXPORT const char* glslang_program_SPIRV_get_messages(glslang_program_t* program)
 120 {
 121     return program->loggerMessages.empty() ? nullptr : program->loggerMessages.c_str();
 122 }