LoadShaders.cpp

#include "LoadShaders.h"
using namespace std;

GLuint LoadShaders(ShaderInfo* shaders )
{
	if(shaders == NULL)
		return -1;
	
	GLuint program = glCreateProgram();
	
	ShaderInfo* entry = shaders;
	
	while (entry->type != GL_NONE)
	{
		GLuint shader = glCreateShader(entry->type);
		entry->shader = shader;
		const GLchar* source = ReadShader(entry->filename);
		if ( source == NULL ) {
			 std::cout<<"source is null"<<std::endl;
		}
		glShaderSource(shader,1,&source, NULL);
		glCompileShader(shader);
		GLint success;
		glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
		if (!success) {
			GLchar InfoLog[1024];
			glGetShaderInfoLog(shader, 1024, NULL, InfoLog);
			cout<<"Error compiling shader type "<<entry->type<<": "<<InfoLog;
		}

		glAttachShader(program,shader);
		entry++;
		
	}
	glLinkProgram( program );
	return program;
}
const GLchar* ReadShader( const char* filename )
{
	FILE* infile = fopen( filename, "rb" );
	if ( !infile )
	{
		std::cout << "Unable to open file '" << filename << "'" << std::endl;
		return NULL;
	}
	fseek( infile, 0, SEEK_END );
	int len = ftell( infile );
	fseek( infile, 0, SEEK_SET );

	GLchar* source = new GLchar[len+1];

	fread( source, 1, len, infile );
	fclose( infile );

	source[len] = 0;

	return const_cast<const GLchar*>(source);
}