46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
#include <stdio.h>
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#include <stdlib.h>
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#include "shader.h"
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GLuint compile_shader(GLenum type, const char *src) {
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GLuint shader = glCreateShader(type);
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glShaderSource(shader, 1, &src, NULL);
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glCompileShader(shader);
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GLint ok;
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glGetShaderiv(shader, GL_COMPILE_STATUS, &ok);
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if (!ok) {
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char log[512];
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glGetShaderInfoLog(shader, sizeof(log), NULL, log);
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fprintf(stderr, "shader compile error: %s\n", log);
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exit(1);
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}
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return shader;
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}
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GLuint create_program(const char *vs_src, const char *fs_src) {
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GLuint vs = compile_shader(GL_VERTEX_SHADER, vs_src);
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GLuint fs = compile_shader(GL_FRAGMENT_SHADER, fs_src);
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GLuint prog = glCreateProgram();
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glAttachShader(prog, vs);
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glAttachShader(prog, fs);
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glLinkProgram(prog);
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GLint ok;
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glGetProgramiv(prog, GL_LINK_STATUS, &ok);
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if (!ok) {
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char log[512];
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glGetProgramInfoLog(prog, sizeof(log), NULL, log);
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fprintf(stderr, "program link error: %s\n", log);
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exit(1);
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}
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glDeleteShader(vs);
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glDeleteShader(fs);
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return prog;
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}
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