67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
#include "./program.h"
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#include <assert.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <GL/glew.h>
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#include "util/math/algorithm.h"
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#include "./shader.h"
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gleasy_program_t gleasy_program_new(
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const char* header, size_t header_len,
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const char* vsrc, size_t vsrc_len,
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const char* fsrc, size_t fsrc_len) {
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assert(header != NULL || header_len == 0);
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assert(vsrc != NULL || vsrc_len == 0);
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assert(fsrc != NULL || fsrc_len == 0);
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gleasy_program_t program = glCreateProgram();
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if (program == 0) {
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fprintf(stderr, "failed to create program");
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abort();
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}
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const gleasy_shader_t vshader =
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gleasy_shader_new(GL_VERTEX_SHADER, header, header_len, vsrc, vsrc_len);
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const gleasy_shader_t fshader =
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gleasy_shader_new(GL_FRAGMENT_SHADER, header, header_len, fsrc, fsrc_len);
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glAttachShader(program, vshader);
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glDeleteShader(vshader);
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glAttachShader(program, fshader);
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glDeleteShader(fshader);
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glLinkProgram(program);
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GLint ok;
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glGetProgramiv(program, GL_LINK_STATUS, &ok);
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if (ok == GL_FALSE) {
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char log[1024];
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const int len =
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gleasy_program_get_log(program, log, sizeof(log)/sizeof(log[0]));
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fprintf(stderr, "failed to link program\n%.*s\n", len, log);
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abort();
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}
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return program;
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}
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size_t gleasy_program_get_log(
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gleasy_program_t program, char* dst, size_t maxlen) {
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assert(program != 0);
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GLint len;
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glGetProgramiv(program, GL_INFO_LOG_LENGTH, &len);
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if (dst == NULL) return len;
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len = MATH_MIN(len, (GLint) maxlen);
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if (len == 0) return 0;
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glGetProgramInfoLog(program, len, &len, (GLchar*) dst);
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return len;
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}
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