yum-mirror/glslang

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1//
2// Copyright (C) 2025 The Khronos Group Inc.
3// All rights reserved.
4//
5// Redistribution and use in source and binary forms, with or without
6// modification, are permitted provided that the following conditions
7// are met:
8//
9//    Redistributions of source code must retain the above copyright
10//    notice, this list of conditions and the following disclaimer.
11//
12//    Redistributions in binary form must reproduce the above
13//    copyright notice, this list of conditions and the following
14//    disclaimer in the documentation and/or other materials provided
15//    with the distribution.
16//
17//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
18//    contributors may be used to endorse or promote products derived
19//    from this software without specific prior written permission.
20//
21// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
27// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
29// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32// POSSIBILITY OF SUCH DAMAGE.
33//
34
35#include <stdint.h>
36#include <stdio.h>
37
38#include <glslang/Include/glslang_c_interface.h>
39
40// Required for use of glslang_default_resource
41#include <glslang/Public/resource_limits_c.h>
42
43typedef struct SpirVBinary {
44    uint32_t* words; // SPIR-V words
45    int size;        // number of words in SPIR-V binary
46} SpirVBinary;
47
48SpirVBinary compileShaderToSPIRV_Vulkan(glslang_stage_t stage, const char* shaderSource, const char* fileName)
49{
50    const glslang_input_t input = {
51        .language = GLSLANG_SOURCE_GLSL,
52        .stage = stage,
53        .client = GLSLANG_CLIENT_VULKAN,
54        .client_version = GLSLANG_TARGET_VULKAN_1_2,
55        .target_language = GLSLANG_TARGET_SPV,
56        .target_language_version = GLSLANG_TARGET_SPV_1_5,
57        .code = shaderSource,
58        .default_version = 100,
59        .default_profile = GLSLANG_NO_PROFILE,
60        .force_default_version_and_profile = false,
61        .forward_compatible = false,
62        .messages = GLSLANG_MSG_DEFAULT_BIT,
63        .resource = glslang_default_resource(),
64    };
65
66    glslang_shader_t* shader = glslang_shader_create(&input);
67
68    SpirVBinary bin = {
69        .words = NULL,
70        .size = 0,
71    };
72    if (!glslang_shader_preprocess(shader, &input)) {
73        printf("GLSL preprocessing failed %s\n", fileName);
74        printf("%s\n", glslang_shader_get_info_log(shader));
75        printf("%s\n", glslang_shader_get_info_debug_log(shader));
76        printf("%s\n", input.code);
77        glslang_shader_delete(shader);
78        return bin;
79    }
80
81    if (!glslang_shader_parse(shader, &input)) {
82        printf("GLSL parsing failed %s\n", fileName);
83        printf("%s\n", glslang_shader_get_info_log(shader));
84        printf("%s\n", glslang_shader_get_info_debug_log(shader));
85        printf("%s\n", glslang_shader_get_preprocessed_code(shader));
86        glslang_shader_delete(shader);
87        return bin;
88    }
89
90    glslang_program_t* program = glslang_program_create();
91    glslang_program_add_shader(program, shader);
92
93    if (!glslang_program_link(program, GLSLANG_MSG_SPV_RULES_BIT | GLSLANG_MSG_VULKAN_RULES_BIT)) {
94        printf("GLSL linking failed %s\n", fileName);
95        printf("%s\n", glslang_program_get_info_log(program));
96        printf("%s\n", glslang_program_get_info_debug_log(program));
97        glslang_program_delete(program);
98        glslang_shader_delete(shader);
99        return bin;
100    }
101
102    glslang_program_SPIRV_generate(program, stage);
103
104    bin.size = glslang_program_SPIRV_get_size(program);
105    bin.words = malloc(bin.size * sizeof(uint32_t));
106    glslang_program_SPIRV_get(program, bin.words);
107
108    const char* spirv_messages = glslang_program_SPIRV_get_messages(program);
109    if (spirv_messages)
110        printf("(%s) %s\b", fileName, spirv_messages);
111
112    glslang_program_delete(program);
113    glslang_shader_delete(shader);
114
115    return bin;
116}
117
118int main() { return 0; }