生成BMP图像但显示倒置
我通过winddk生成了bitmap.dll。
手动添加为打印机驱动程序，选择打印到文件驱动程序。
使用它，我使用文件中的打印命令创建文档的图像。
我能够创建图像并查看它，但问题是我得到了倒置（镜像）图像。
cScans = pOemPDEV->bmInfoHeader.biHeight;
// Flip the biHeight member so that it denotes top-down bitmap
pOemPDEV->bmInfoHeader.biHeight = cScans * -1;
有没有人解决此代码？当我评论（以正确生成标题）这一行时遇到问题。
I have generated bitmap.dll through winddk.
Added manually as a printer driver selecting print-to-file driver.
Using this I create an image of my document using print command from file.
I am able to create image and view it, But the problem is that I get inverted(mirror) image.
cScans = pOemPDEV->bmInfoHeader.biHeight;
// Flip the biHeight member so that it denotes top-down bitmap
pOemPDEV->bmInfoHeader.biHeight = cScans * -1;
Have anyone workaround of this code? As I get the problem when I comment(to get header properly generated) this lines.
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设备独立位图被记录为布置在内存中，底线位于缓冲区的开头。这是 OS/2 设计者在笛卡尔坐标系中进行的一项实验，他们在开发 Windows 3 的同时与 Microsoft 合作。
有两种可能的修复方法：
Device Independent Bitmaps are documented as being laid out in memory with the bottom line at the start of the buffer. Its an experiment in cartesian co-ordinates perpetrated by the designers of OS/2 who were working with Microsoft at the same time Windows 3 was being developed.
There are two possible fixes: