This repository has been archived on 2022-05-21. You can view files and clone it, but cannot push or open issues or pull requests.
LEFTONE/util/gleasy/program.c

67 lines
1.6 KiB
C
Raw Normal View History

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