85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
|
int buildShaders(int foo, const char *vertexShaderSourceParam, const char *fragmentShaderSourceParam){
|
||
|
|
printf("building shaders...\n");
|
||
|
|
// build and compile our shader program
|
||
|
|
// ------------------------------------
|
||
|
|
|
||
|
|
// open file and convert it to string for vs:
|
||
|
|
char * vbuffer = 0;
|
||
|
|
long vlength;
|
||
|
|
FILE * vertex_file = fopen (vertexShaderSourceParam, "rb");
|
||
|
|
|
||
|
|
if (vertex_file)
|
||
|
|
{
|
||
|
|
fseek (vertex_file, 0, SEEK_END);
|
||
|
|
vlength = ftell (vertex_file);
|
||
|
|
fseek (vertex_file, 0, SEEK_SET);
|
||
|
|
vbuffer = malloc (vlength + 1);
|
||
|
|
if (vbuffer)
|
||
|
|
{
|
||
|
|
fread (vbuffer, 1, vlength, vertex_file);
|
||
|
|
}
|
||
|
|
fclose (vertex_file);
|
||
|
|
vbuffer[vlength] = '\0';
|
||
|
|
}
|
||
|
|
|
||
|
|
char * fbuffer = 0;
|
||
|
|
long flength;
|
||
|
|
FILE * fragment_file = fopen (fragmentShaderSourceParam, "rb");
|
||
|
|
|
||
|
|
if (fragment_file)
|
||
|
|
{
|
||
|
|
fseek (fragment_file, 0, SEEK_END);
|
||
|
|
flength = ftell (fragment_file);
|
||
|
|
fseek (fragment_file, 0, SEEK_SET);
|
||
|
|
fbuffer = malloc (flength + 1);
|
||
|
|
if (fbuffer)
|
||
|
|
{
|
||
|
|
fread (fbuffer, 1, flength, fragment_file);
|
||
|
|
}
|
||
|
|
fclose (fragment_file);
|
||
|
|
fbuffer[flength] = '\0';
|
||
|
|
}
|
||
|
|
|
||
|
|
// vertex shader
|
||
|
|
int vertexShader = glCreateShader(GL_VERTEX_SHADER);
|
||
|
|
glShaderSource(vertexShader, 1, &vbuffer, NULL);
|
||
|
|
glCompileShader(vertexShader);
|
||
|
|
// check for shader compile errors
|
||
|
|
int success;
|
||
|
|
char infoLog[512];
|
||
|
|
glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
|
||
|
|
if (!success)
|
||
|
|
{
|
||
|
|
glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
|
||
|
|
printf("ERROR::SHADER::VERTEX::COMPILATION_FAILED\n %s", infoLog);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
// fragment shader
|
||
|
|
int fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
|
||
|
|
glShaderSource(fragmentShader, 1, &fbuffer, NULL);
|
||
|
|
glCompileShader(fragmentShader);
|
||
|
|
// check for shader compile errors
|
||
|
|
glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);
|
||
|
|
if (!success)
|
||
|
|
{
|
||
|
|
glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
|
||
|
|
printf("ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n %s", infoLog);
|
||
|
|
return 2;
|
||
|
|
}
|
||
|
|
// link shaders
|
||
|
|
// int shaderProgram = glCreateProgram();
|
||
|
|
glAttachShader(foo, vertexShader);
|
||
|
|
glAttachShader(foo, fragmentShader);
|
||
|
|
glLinkProgram(foo);
|
||
|
|
// check for linking errors
|
||
|
|
glGetProgramiv(foo, GL_LINK_STATUS, &success);
|
||
|
|
if (!success) {
|
||
|
|
glGetProgramInfoLog(foo, 512, NULL, infoLog);
|
||
|
|
printf("ERROR::SHADER::PROGRAM::LINKING_FAILED\n %s", infoLog);
|
||
|
|
return 3;
|
||
|
|
}
|
||
|
|
glDeleteShader(vertexShader);
|
||
|
|
glDeleteShader(fragmentShader);
|
||
|
|
return 0;
|
||
|
|
}
|