解决非4字节对齐的HGImage保存BMP出错的问题

modules/base/HGImage.cpp

@@ -2793,7 +2793,10 @@ static inline void SetBit(HGByte* data, HGUInt index, HGByte value)
 	assert(0 == value || 1 == value);
 	HGUInt byteIndex = index / 8;
 	HGUInt bitIndex = index % 8;
-	data[byteIndex] |= (value << (7 - bitIndex));
+	if (1 == value)
+		data[byteIndex] |= (1 << (7 - bitIndex));
+	else
+		data[byteIndex] &= ~(1 << (7 - bitIndex));
 }
 
 static HGResult CopyImageWithBinary(HGImageImpl *srcImageImpl, HGImageImpl *destImageImpl)

modules/imgfmt/HGBmp.cpp

@@ -258,6 +258,37 @@ HGResult HGAPI HGImgFmt_SaveBmpImage(HGImage image, const HGBmpSaveInfo* info, c
 	uint32_t type = imgInfo.type;
 	uint32_t origin = imgInfo.origin;
 
+	HGUInt bpp = 0;
+	if (HGBASE_IMGTYPE_BINARY == type)
+		bpp = 1;
+	else if (HGBASE_IMGTYPE_GRAY == type)
+		bpp = 8;
+	else if (HGBASE_IMGTYPE_BGR == type || HGBASE_IMGTYPE_RGB == type)
+		bpp = 24;
+	else if (HGBASE_IMGTYPE_BGRA == type || HGBASE_IMGTYPE_RGBA == type)
+		bpp = 32;
+	assert(0 != bpp);
+	HGUInt stdWidthStep = ((width * bpp + 31) & ~31) >> 3;
+
+	if (widthStep != stdWidthStep)
+	{
+		HGImage imgTemp = NULL;
+
+		HGImageRoi imageRoi;
+		HGBase_GetImageROI(image, &imageRoi);
+		HGBase_ResetImageROI(image);
+		HGResult ret = HGBase_CloneImage(image, 0, 0, &imgTemp);
+		HGBase_SetImageROI(image, &imageRoi);
+		if (HGBASE_ERR_OK != ret)
+		{
+			return ret;
+		}
+
+		ret = HGImgFmt_SaveBmpImage(imgTemp, info, fileName);
+		HGBase_DestroyImage(imgTemp);
+		return ret;
+	}
+
 	FILE* file = fopen(fileName, "wb");
 	if (NULL == file)
 	{