charcoal/OpenGLEngine/Shader.cpp

#include "Shader.h"

#include "Exception.h"

Shader::Shader(const std::string& source, ShaderType type)
{
	GLenum gl_shader_type;
	switch (type)
	{
	case VERTEX_SHADER:
		gl_shader_type = GL_VERTEX_SHADER;
		break;
	case FRAGMENT_SHADER:
		gl_shader_type = GL_FRAGMENT_SHADER;
		break;
	default:
		throw "Invalid Shader Type Specified";
	}

	m_shader = glCreateShader(gl_shader_type);

	const char* c_str = source.c_str();

	glShaderSource(m_shader, 1, &c_str, NULL);
	glCompileShader(m_shader);

	// Make sure that the shader has been compiled successfully
	GLint compiled;
	glGetShaderiv(m_shader, GL_COMPILE_STATUS, &compiled);
	if (compiled != GL_TRUE)
	{
		char buffer[1024];
		GLsizei log_length;
		glGetShaderInfoLog(m_shader, 1023, &log_length, buffer);
		buffer[log_length] = '\0'; // Add null terminator
		OutputDebugString("Error Compiling Shader:\n");
		OutputDebugString(buffer);
		OutputDebugString("\nSource:\n");
		OutputDebugString(source.c_str());
		OutputDebugString("\n");
		m_shader = 0;
		throw EXCEPTION("Error compiling shader.");
	}
}

Shader::~Shader()
{
}

GLuint Shader::get_shader() const
{
	return m_shader;
}