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Advanced save functions

Saving bitmaps using the SaveToHandle functions is almost identical to loading bitmap via the LoadFromHandle functions.

unsigned
_ReadProc(void *buffer, unsigned s, unsigned c, fi_handle handle) {
return fread(buffer, s, c, (FILE *)handle);
}

unsigned
_WriteProc(void *buffer, unsigned s, unsigned c, fi_handle handle){
return fwrite(buffer, s, c, (FILE *)handle);
}

int
_SeekProc(fi_handle handle, long offset, int origin) {
return fseek((FILE *)handle, offset, origin);
}

long
_TellProc(fi_handle handle) {
return ftell((FILE *)handle);
}

FreeImageIO io;
io.read_proc = _ReadProc;
io.write_proc = _WriteProc;
io.seek_proc = _SeekProc;
io.tell_proc = _TellProc;

FILE *file = fopen("test.bmp", "rb");

void *dib = FreeImage_LoadBMPFromHandle(&io, (fi_handle)file);

fclose(file);

if (dib != NULL) {
file = fopen("saved.bmp", "wb");

FreeImage_SavePNGToHandle(dib, &io, (fi_handle)file);

fclose(file);
}

FreeImage_Free(dib);

Subsections

FreeImage_SaveBMPToHandle

FreeImage_SavePNGToHandle

FreeImage_SavePNMToHandle

FreeImage_SaveTIFFToHandle

FreeImage_SaveBMPToHandle

bool FreeImage_SaveBMPToHandle(void *dib, FreeImageIO *io, fi_handle handle, BMPFlags flags = BMP_DEFAULT);

Saves the FreeImage DIB to a Windows Bitmap file. The BMP file is always saved in the Windows format. No compression is used.

FreeImage_SavePNGToHandle

bool FreeImage_SavePNGToHandle(void *dib, FreeImageIO *io, fi_handle handle, PNGFlags flags = PNG_DEFAULT);

Saves the FreeImage DIB to a PNG file.

FreeImage_SavePNMToHandle

bool FreeImage_SavePNMToHandle(void *dib, FreeImageIO *io, fi_handle handle, PNMFlags flags = PNM_DEFAULT);

Saves the FreeImage DIB to a PNM file. PNM is a descriptive name for a collection of ASCII based bitmap types: PBM, PGM and PPM. If the bitmap has a bitdepth of 1, the file is saved as a PBM file. If the bitmap has a bitdepth of 8, the file is saved as a PGM file. If the bitmap has a bitdepth of 24, the file is saved as a PPM file. Other bitdepths are not supported.

FreeImage_SaveTIFFToHandle

bool FreeImage_SaveTIFFToHandle(void *dib, FreeImageIO *io, fi_handle handle, TIFFFlags flags = TIFF_DEFAULT);

Saves the FreeImage DIB to a TIFF file.