GLSL Vertex Shader error

Is the loading code different for vertex shader? Feels like you have messed up something there.

Is it possible you have invalid characters in the file? Depending on the editor an invalid character can easily slip with a copy'n'paste or accidental hotkey. A lot of editors will then pick a suitable encoding to encode the undesired character and it will often be invisble to the naked eye then.
Have you tried explicitely forcing ANSI encoding on the file (for example in Notepad++ Encoding->Convert to ANSI)? If the problem is a rogue character it will usually show up in an obvious way (the not-in-font symbol or 'weird' symbols).

Here's the code for the loader:

[source lang="cpp"]
void meEnableShaders()
{
/* load the fragment shader */
char *frag_buffer, *vert_buffer;

FILE *fp = fopen("MaddEngine.frag", "rb");
int frag_size;
fseek(fp, 0, SEEK_END);
frag_size = ftell(fp);
fseek(fp, 0, SEEK_SET);
frag_buffer = (char*)malloc(frag_size);
fread(frag_buffer, 1, frag_size, fp);
fclose(fp);

/* load the vertex shader */
fp = fopen("MaddEngine.vert", "rb");
int vert_size;
fseek(fp, 0, SEEK_END);
vert_size = ftell(fp);
vert_buffer = (char*)malloc(vert_size);
fread(vert_buffer, 1, vert_size, fp);
fclose(fp);

#ifdef ARB_SHADER
me_fragment_shader = glCreateShaderObjectARB(GL_FRAGMENT_SHADER_ARB);
glShaderSourceARB(me_fragment_shader, 1, &frag_buffer, &frag_size);
glCompileShaderARB(me_fragment_shader);

me_vertex_shader = glCreateShaderObjectARB(GL_VERTEX_SHADER_ARB);
glShaderSourceARB(me_vertex_shader, 1, |_buffer, |_size);
glCompileShaderARB(me_vertex_shader);

me_shader_program = glCreateProgramObjectARB();
glAttachObjectARB(me_shader_program, me_fragment_shader);
glAttachObjectARB(me_shader_program, me_vertex_shader);
glLinkProgramARB(me_shader_program);
glUseProgramObjectARB(me_shader_program);
#else
me_fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(me_fragment_shader, 1, &frag_buffer, &frag_size);
glCompileShader(me_fragment_shader);

me_vertex_shader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(me_vertex_shader, 1, |_buffer, |_size);
glCompileShader(me_vertex_shader);

me_shader_program = glCreateProgram();
glAttachShader(me_shader_program, me_fragment_shader);
glAttachShader(me_shader_program, me_vertex_shader);
glLinkProgram(me_shader_program);
glUseProgram(me_shader_program);
#endif
free(frag_buffer);
free(vert_buffer);
};
[/source]


It is compiled without the ARB_SHADER macro (so it uses the standard OpenGL functions).

I edit the files with gedit under Ubuntu, which uses UTF-8.

I'm sorry, I just noticed the problem. I forgot to seek back to the start of the file after getting its size *facepalm*

After setting the stream to the end of the file and calling ::ftell(), you never set the stream back to the beginning of the file before you try to read it.
On the vertex shader.


L. Spiro


[EDIT]
I stopped reading as soon as I saw the problem. Even if it was just one last post with a single sentence explaining the solution.
[/EDIT]

Even if the problem has been found, it isn't a good idea to read a text file as binary because on some systems (Windows), end of lines are in the form of \r\n or was it \n\r.
It is better to open the file this way
FILE *fp = fopen("MaddEngine.frag", "r"); //changed the "rb" to "r"

and the library will automatically convert all the \r\n to \n (newlines).

and it is a good idea to NULL terminate the file string yourself.