Function ilCopyPixels2D

DevIL/src-IL/src/il_manip.cpp:418–459

Copies a 2d block of pixels to the buffer pointed to by Data.

// Copies a 2d block of pixels to the buffer pointed to by Data.
ILboolean ilCopyPixels2D(ILuint XOff, ILuint YOff, ILuint Width, ILuint Height, void *Data)
{
	ILuint	x, y, c, NewBps, DataBps, NewXOff, NewHeight, PixBpp;
	ILubyte	*Temp = (ILubyte*)Data, *TempData = iCurImage->Data;

	if (ilIsEnabled(IL_ORIGIN_SET)) {
		if ((ILenum)ilGetInteger(IL_ORIGIN_MODE) != iCurImage->Origin) {
			TempData = iGetFlipped(iCurImage);
			if (TempData == NULL)
				return IL_FALSE;
		}
	}

	PixBpp = iCurImage->Bpp * iCurImage->Bpc;

	if (iCurImage->Width < XOff + Width)
		NewBps = (iCurImage->Width - XOff) * PixBpp;
	else
		NewBps = Width * PixBpp;

	if (iCurImage->Height < YOff + Height)
		NewHeight = iCurImage->Height - YOff;
	else
		NewHeight = Height;

	DataBps = Width * PixBpp;
	NewXOff = XOff * PixBpp;

	for (y = 0; y < NewHeight; y++) {
		for (x = 0; x < NewBps; x += PixBpp) {
			for (c = 0; c < PixBpp; c++) {
				Temp[y * DataBps + x + c] = 
					TempData[(y + YOff) * iCurImage->Bps + x + NewXOff + c];
			}
		}
	}

	if (TempData != iCurImage->Data)
		ifree(TempData);

	return IL_TRUE;
}


// Copies a 3d block of pixels to the buffer pointed to by Data.