Quote:Original post by billconan
hello guys, is it true that opengl only support texture in square?
i'm working on my 3d modeller which allows people to choose an image as reference, and i can't guarantee that the image is in square. my program is ok if the image i specified is in square but becomes very weird if it is not. so how to deal with it. do i need to manually map the image to a square texture? thank you.

	GLuint loadTexture(char *fileName)	{		GLuint txtnumber;		wxImage texture(_T(fileName),wxBITMAP_TYPE_PNG,-1);		int theHeight=texture.GetHeight(); //read into height and width		int theWidth=texture.GetWidth();		unsigned char *RGBData=texture.GetData();		unsigned char *alphaData=texture.GetAlpha();		size_t pixelCount=theHeight*theWidth;		size_t dataSize=pixelCount*4;		unsigned char *data=new unsigned char[dataSize];		for(size_t i=0;i<pixelCount;++i)		{			data[i*4]=RGBData[i*3];			data[i*4+1]=RGBData[i*3+1];			data[i*4+2]=RGBData[i*3+2];			data[i*4+3]=alphaData;		}		glGenTextures(1, &txtnumber);		glBindTexture(GL_TEXTURE_2D, txtnumber);		glTexImage2D(GL_TEXTURE_2D, 0, 4, theHeight, theWidth, 0,GL_RGBA,GL_UNSIGNED_BYTE, data);		glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);		glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);		delete data;		return txtnumber;	};