Discussions on GFL SDK, the graphic library for reading and writing graphic files
Moderators: XnTriq, helmut, xnview
- Posts: 7
- Joined: Fri Apr 11, 2008 9:15 am
i'm using gflLoadBitmapFromMemory() on a PNG file image with ColorType 3 (indexed color) and transparency chunk which stores the Alpha channel for the LUT.
Code: Select all
gflGetDefaultLoadParams( &load_params );
load_params.Flags = GFL_LOAD_ORIGINAL_DEPTH | GFL_LOAD_FORCE_COLOR_MODEL;
load_params.ColorModel = GFL_RGBA;
GFL_BITMAP *p_bitmap = 0;
GFL_ERROR const gfl_error = gflLoadBitmapFromMemory( reinterpret_cast<GFL_UINT8 const *>(pIn), filled, &p_bitmap, &load_params, NULL );
unfortunately the bitmap returned by gflLoadBitmapFromMemory() apparently ignores the Alpha channel from the PNG and returns image data with an Alpha value of 0xFF for all pixels (tested with GFL SDK 2.82 and 3.11)
we'd really appreciate a fix for this!
- Author of XnView
- Posts: 41859
- Joined: Mon Oct 13, 2003 7:31 am
- Location: France
Alpha for 8 bits colors PNG can't be loaded...