#include "TextureBean.h"
#include "../global.h"
#define STB_IMAGE_IMPLEMENTATION
#include "../external/stb/stb_image.h"

TextureBean::TextureBean()
	:m_PData(nullptr)
{
	m_Glu = new GLuint[1];
}


TextureBean::~TextureBean()
{
	delete[] m_Glu;
	if (m_PData)delete[] m_PData;
}



void TextureBean::Load()
{
	if (!m_PData)return;
	unsigned char *data = stbi_load_from_memory(m_PData, m_DataLen, &m_Width, &m_Height, &m_Comp, 0);
	if (m_Comp == 4) {
		m_Bpp = GL_RGBA;
	}
	else{
		m_Bpp = GL_RGB;
	}
	glGenTextures(1, m_Glu);
	glBindTexture(GL_TEXTURE_2D, m_Glu[0]);
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);

	//even better quality, but this will do for now.
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

	//to the edge of our shape. 
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

	//Generate the texture
	glTexImage2D(GL_TEXTURE_2D, 0, m_Bpp, m_Width, m_Height, 0, m_Bpp, GL_UNSIGNED_BYTE, data);
	stbi_image_free(data);
	delete[] m_PData;
	m_PData = nullptr;
}