Texture Atlas Maker

#include "PreCompile.h"
#include "ImageTarga.h"
#include "TargaReader.h"

ImageTarga::ImageTarga()
{
}

ImageTarga::~ImageTarga()
{
}

void ImageTarga::Load(const string& fileName, bool transparent)
{
	m_name = fileName;
	TargaReader targaReader;
	targaReader.Load(fileName);
	if (targaReader.GetBitDepth() != 32 && targaReader.GetBitDepth() != 16
		&& targaReader.GetBitDepth() != 24) 
	{
		throw RacException("bit depth of tga file must be 32, 24, or 16");
	}
	const GLubyte* pTextureData = targaReader.GetRawData();
	m_width = targaReader.GetWidth();
	m_height = targaReader.GetHeight();

	glEnable(GL_TEXTURE_2D); 
	glGenTextures(1, &m_textureID);	
	glBindTexture(GL_TEXTURE_2D, m_textureID); 
	glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
					GL_NEAREST);
	if (targaReader.GetBitDepth() == 32)
	{
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_width, m_height,
			0, GL_RGBA, GL_UNSIGNED_BYTE, pTextureData);
	}
	else if (targaReader.GetBitDepth() == 24)
	{
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, m_width, m_height,
				0, GL_RGB, GL_UNSIGNED_BYTE, pTextureData);
	}
	else
	{
		if (transparent)
			glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_width, m_height,
				0, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, pTextureData);
		else
			glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, m_width, m_height,
				0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, pTextureData);
	}
	int err = glGetError();
	if (err != GL_NO_ERROR)
	{
		throw RacException("Error in glTexImage2D: ", err);
	}
}