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//
// Copyright (C) 2025 The Khronos Group Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
//
// Neither the name of 3Dlabs Inc. Ltd. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
#include <stdint.h>
#include <stdio.h>
#include <glslang/Include/glslang_c_interface.h>
// Required for use of glslang_default_resource
#include <glslang/Public/resource_limits_c.h>
typedef struct SpirVBinary {
uint32_t* words; // SPIR-V words
int size; // number of words in SPIR-V binary
} SpirVBinary;
SpirVBinary compileShaderToSPIRV_Vulkan(glslang_stage_t stage, const char* shaderSource, const char* fileName)
{
const glslang_input_t input = {
.language = GLSLANG_SOURCE_GLSL,
.stage = stage,
.client = GLSLANG_CLIENT_VULKAN,
.client_version = GLSLANG_TARGET_VULKAN_1_2,
.target_language = GLSLANG_TARGET_SPV,
.target_language_version = GLSLANG_TARGET_SPV_1_5,
.code = shaderSource,
.default_version = 100,
.default_profile = GLSLANG_NO_PROFILE,
.force_default_version_and_profile = false,
.forward_compatible = false,
.messages = GLSLANG_MSG_DEFAULT_BIT,
.resource = glslang_default_resource(),
};
glslang_shader_t* shader = glslang_shader_create(&input);
SpirVBinary bin = {
.words = NULL,
.size = 0,
};
if (!glslang_shader_preprocess(shader, &input)) {
printf("GLSL preprocessing failed %s\n", fileName);
printf("%s\n", glslang_shader_get_info_log(shader));
printf("%s\n", glslang_shader_get_info_debug_log(shader));
printf("%s\n", input.code);
glslang_shader_delete(shader);
return bin;
}
if (!glslang_shader_parse(shader, &input)) {
printf("GLSL parsing failed %s\n", fileName);
printf("%s\n", glslang_shader_get_info_log(shader));
printf("%s\n", glslang_shader_get_info_debug_log(shader));
printf("%s\n", glslang_shader_get_preprocessed_code(shader));
glslang_shader_delete(shader);
return bin;
}
glslang_program_t* program = glslang_program_create();
glslang_program_add_shader(program, shader);
if (!glslang_program_link(program, GLSLANG_MSG_SPV_RULES_BIT | GLSLANG_MSG_VULKAN_RULES_BIT)) {
printf("GLSL linking failed %s\n", fileName);
printf("%s\n", glslang_program_get_info_log(program));
printf("%s\n", glslang_program_get_info_debug_log(program));
glslang_program_delete(program);
glslang_shader_delete(shader);
return bin;
}
glslang_program_SPIRV_generate(program, stage);
bin.size = glslang_program_SPIRV_get_size(program);
bin.words = malloc(bin.size * sizeof(uint32_t));
glslang_program_SPIRV_get(program, bin.words);
const char* spirv_messages = glslang_program_SPIRV_get_messages(program);
if (spirv_messages)
printf("(%s) %s\b", fileName, spirv_messages);
glslang_program_delete(program);
glslang_shader_delete(shader);
return bin;
}
int main() { return 0; }
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