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

	imgSrc = vgCreateImage(i, 256, 256, VG_IMAGE_QUALITY_NONANTIALIASED);
	
	col[0] = 1.0f; col[1] = 0.6f; col[2] = 0.3f; col[3] = 0.7f;
	vgSetfv(VG_CLEAR_COLOR, 4, col);
	vgClearImage(imgSrc, 0, 0, 256, 256);
	
	col[0] = 0.3f; col[1] = 0.6f; col[2] = 1.0f; col[3] = 0.49f;
	vgSetfv(VG_CLEAR_COLOR, 4, col);
	vgClearImage(imgSrc, 50, 50, 60, 80);
	
	col[0] = 0.8f; col[1] = 0.2f; col[2] = 0.8f; col[3] = 0.9f;
	vgSetfv(VG_CLEAR_COLOR, 4, col);
	vgClearImage(imgSrc, 120, 10, 40, 300);

	col[0] = 0.2f; col[1] = 0.8f; col[2] = 0.6f; col[3] = 0.3f;
	vgSetfv(VG_CLEAR_COLOR, 4, col);
	vgClearImage(imgSrc, -120, -10, 300, 40);
	
	vgGetImageSubData(imgSrc, imgOutputDataRGBA, 1024, VG_lRGBA_8888, 0, 0, 256, 256);
		
	strcpy(imgFileName, "image_clear_");
	strcat(imgFileName, imageFormatToString(i));
	strcat(imgFileName, ".png");
	strcpy(testDesc, "Image clear over ");
	strcat(testDesc, imageFormatToString(i));
	strcat(testDesc, " format.");
		
	// pixel format without alpha channel will be saved forcing alpha to 0xFF		
	switch (i) {
		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, 256, 256, imgOutputDataRGBA, 1);
			break;
		default:
			saveImage32(f, imgFileName, testDesc, 256, 256, imgOutputDataRGBA, 0);
	}
	vgDestroyImage(imgSrc);
}