图像位深度转换 C++Builder

[wp859859]

哪位大神能提供下，C++Builder 对图像位深度转换的方法，谢谢！qq邮箱：[e-mail]

[ooolinux]

TBitmap::PixelFormat Indicates the bit format of the bitmap image, specifying how the image is displayed and how the pixels of the bitmap image are stored in memory. enum TPixelFormat {pfDevice, pf1bit, pf4bit, pf8bit, pf15bit, pf16bit, pf24bit, pf32bit, pfCustom}; __property TPixelFormat PixelFormat = {read=GetPixelFormat, write=SetPixelFormat, nodefault}; Description Use PixelFormat to change a TBitmap's internal image to a particular memory format and color depth, or to find out what memory format and color depth a TBitmap is using. For example, PixelFormat can be used to set the pixel format of the bitmap image to 8-bit for video drivers that cannot display the native format of a bitmap image. Changing the pixel format is most commonly used with ScanLine, because your code must decode the pixel data accessed by ScanLine. Image-editing tools usually use one pixel for all internal image operations and copy the results to the screen (in whatever format) as the last step. —————————— TJPEGImage::PixelFormat Determines whether the JPEG image is displayed in 24 or 8-bit format. enum TJPEGPixelFormat {jf24Bit, jf8Bit}; __property TJPEGPixelFormat PixelFormat = {read=FPixelFormat, write=SetPixelFormat, nodefault }; Description Use PixelFormat to set the pixel format of the jpeg image to 8-bit for video drivers that cannot display 24-bit. The native format of a jpeg image is 24-bit. PixelFormat is used for decompression, that is, for reading in files. PixelFormat will also apply to a bitmap if the image is copied to it.

[wp859859]

找到了，谢谢大家