GFL Misc.

gflGetNumberOfColorsUsed

The gflGetNumberOfColorsUsed gets the total unique colors of a picture.

GFL_UINT32 gflGetNumberOfColorsUsed(
  GFL_BITMAP* src
);

Parameters

src

Pointer to a GFL_BITMAP structure.

Return value

Total unique colors.

The gflJpegLosslessTransform function applies lossless transformations on a JPEG file.

GFL_ERROR gflJpegLosslessTransform(
  const char* filename,  
  GFL_LOSSLESS_TRANSFORM transform
);

Parameters

filename

Pointer to a null-terminated string that contains the filename to modify.

transform

Transformation

GFL_LOSSLESS_TRANSFORM_ROTATE90	Rotate of 90 degrees
GFL_LOSSLESS_TRANSFORM_ROTATE180	Rotate of 180 degrees
GFL_LOSSLESS_TRANSFORM_ROTATE270	Rotate of 270 degrees
GFL_LOSSLESS_TRANSFORM_VERTICAL_FLIP	Vertical flip
GFL_LOSSLESS_TRANSFORM_HORIZONTAL_FLIP	Horizontal flip

Return value

The function returns GFL_NO_ERROR if it is successful or a value of GFL_ERROR.