// create image and load external data
imgSrc = vgCreateImage(VG_sRGBA_5551, imgDiceAlphaWidth, imgDiceAlphaHeight, VG_IMAGE_QUALITY_NONANTIALIASED);
vgImageSubData(imgSrc, (const void *)imgDiceAlphaData, imgDiceAlphaDataStride, imgDiceAlphaFormat, 0, 0, imgDiceAlphaWidth, imgDiceAlphaHeight);

for (j = VG_sRGBX_8888; j <= VG_BW_1; ++j) {

	imgDst = vgCreateImage(j, imgDiceAlphaWidth, imgDiceAlphaHeight, VG_IMAGE_QUALITY_NONANTIALIASED);
	vgCopyImage(imgDst, 0, 0, imgSrc, 0, 0, imgDiceAlphaWidth, imgDiceAlphaHeight, VG_TRUE);
	vgGetImageSubData(imgDst, imgOutputDataRGBA, imgDiceAlphaDataStride, imgDiceAlphaFormat, 0, 0, imgDiceAlphaWidth, imgDiceAlphaHeight);
		
	strcpy(imgFileName, "imgconv_sRGBA5551_to_");
	strcat(imgFileName, imageFormatToString(j));
	strcat(imgFileName, "_dither.png");
	strcpy(testDesc, "Image conversion from sRGBA5551 format to ");
	strcat(testDesc, imageFormatToString(j));
	strcat(testDesc, " format, with dithering.");
		
	// pixel format without alpha channel will be saved forcing alpha to 0xFF		
	switch (j) {
		case VG_sRGBX_8888:
		case VG_sRGB_565:
		case VG_sL_8:
		case VG_lRGBX_8888:
		case VG_lL_8:
		case VG_BW_1:
			saveImage32(f, imgFileName, testDesc, imgDiceAlphaWidth, imgDiceAlphaHeight, imgOutputDataRGBA, 1);
			break;
		default:
			saveImage32(f, imgFileName, testDesc, imgDiceAlphaWidth, imgDiceAlphaHeight, imgOutputDataRGBA, 0);
	}
	vgDestroyImage(imgDst);
}

vgDestroyImage(imgSrc);