result WavStream::loadToMem(const char *aFilename)
{
DiskFile df;
int res = df.open(aFilename);
if (res == SO_NO_ERROR)
{
res = loadFileToMem(&df);
}
return res;
}
struct shaderObject * loadShader(char * vertexShaderChar,char * fragmentShaderChar)
{
fprintf(stderr,"Loading Shaders ( %s , %s ) \n",vertexShaderChar,fragmentShaderChar);
GLint isok;
struct shaderObject * sh = (struct shaderObject *) malloc(sizeof(struct shaderObject));
sh->ProgramObject = glCreateProgram();
sh->vertexShaderObject = glCreateShader(GL_VERTEX_SHADER);
sh->fragmentShaderObject = glCreateShader(GL_FRAGMENT_SHADER);
sh->vertMem=loadFileToMem(vertexShaderChar,&sh->vertMemLength);
if ( (sh->vertMem==0)||(sh->vertMemLength==0)) { fprintf(stderr,"Could not load vertex shader in memory..\n"); }
sh->fragMem=loadFileToMem(fragmentShaderChar,&sh->fragMemLength);
if ( (sh->fragMem==0)||(sh->fragMemLength==0)) { fprintf(stderr,"Could not load fragment shader in memory..\n"); }
fprintf(stderr,"VERTEX SHADER (%u bytes long) \n\n %s \n",sh->vertMemLength,sh->vertMem);
fprintf(stderr,"FRAGMENT SHADER (%u bytes long) \n\n %s \n",sh->fragMemLength,sh->fragMem);
#if USE_FAILSAFE_SHADER==1
fprintf(stderr,"Overriding %s and %s and using failsafe shaders instead!\n",vertexShaderChar,fragmentShaderChar);
glShaderSource(sh->vertexShaderObject, 1, &vertex_source , 0 );
glShaderSource(sh->fragmentShaderObject, 1, &fragment_source , 0 );
#else
glShaderSource(sh->vertexShaderObject, 1,&sh->vertMem, &sh->vertMemLength);
glShaderSource(sh->fragmentShaderObject, 1, &sh->fragMem, &sh->fragMemLength);
#endif
glCompileShader(sh->vertexShaderObject);
glGetShaderiv(sh->vertexShaderObject, GL_COMPILE_STATUS, &isok);
if (!isok)
{
fprintf(stderr,"Could not compile shader %s \n",vertexShaderChar);
GLchar info[1024]; GLsizei length;
glGetShaderInfoLog(sh->vertexShaderObject,1024, &length,&info);
fprintf(stderr,"Shader error : %s \n",info);
glDeleteProgram(sh->ProgramObject);
free(sh->vertMem); free(sh->fragMem); free(sh);
return 0;
}
glCompileShader(sh->fragmentShaderObject);
glGetShaderiv(sh->fragmentShaderObject, GL_COMPILE_STATUS, &isok);
if (!isok)
{
fprintf(stderr,"Could not compile shader %s \n",fragmentShaderChar);
GLchar info[1024]; GLsizei length;
glGetShaderInfoLog(sh->fragmentShaderObject,1024, &length,&info);
fprintf(stderr,"Shader error : %s \n",info);
glDeleteShader(sh->vertexShaderObject); //(because since we are here it means that vertexShader was ok) :(
glDeleteProgram(sh->ProgramObject);
free(sh->vertMem); free(sh->fragMem); free(sh);
return 0;
}
glAttachShader(sh->ProgramObject, sh->vertexShaderObject);
glAttachShader(sh->ProgramObject, sh->fragmentShaderObject);
glLinkProgram(sh->ProgramObject);
glGetProgramiv(sh->ProgramObject, GL_LINK_STATUS, &isok);
if (!isok)
{
fprintf(stderr,"Could not link shaders\n");
GLchar info[1024]; GLsizei length;
glGetProgramInfoLog(sh->ProgramObject, 1024 , &length , &info);
fprintf(stderr,"Shader error : %s \n",info);
glDetachShader(sh->ProgramObject, sh->vertexShaderObject);
glDetachShader(sh->ProgramObject, sh->fragmentShaderObject);
glDeleteShader(sh->vertexShaderObject);
glDeleteShader(sh->fragmentShaderObject);
glDeleteProgram(sh->ProgramObject);
free(sh->vertMem); free(sh->fragMem); free(sh);
return 0;
}
fprintf(stderr,"Switching to new shaders \n");
glUseProgramObjectARB(sh->ProgramObject);
return sh;
}
