mastintin wrote:Enrico Maria Giordano wrote:On XP and Vista your sample shows a black rectangle.
EMG
https://support.microsoft.com/es-es/kb/958911
Ok, thank you.
EMG
Ok, thank you.
EMG
FiveTech Support Forums
FiveWin / Harbour / xBase community
Board index FiveWin for Harbour/xHarbour Bad quality with GIF (and GDI+)
Ok, thank you.
EMG
Enrico Maria Giordano wrote:mastintin wrote:Enrico Maria Giordano wrote:On XP and Vista your sample shows a black rectangle.
EMG
https://support.microsoft.com/es-es/kb/958911
Ok, thank you.
EMG
first confirm is ok. ...
link this gdiplus.obj file in your code ...
https://www.dropbox.com/s/ah0f235yqbe5a ... s.obj?dl=0
It works!!! 
EMG
Mr Manuel
This is the change you made. That means this function adopts "PixelFormat32bppPARGB" for "all" image/bitmap files, irrespective of the source and present pixelformat.
Does it have any side effects on other file formats?
Bitmap* newImage = new Bitmap( nWidth, nHeight, PixelFormat32bppPARGB ) ; // cambio aqui ---- original->GetPixelFormat() );This is the change you made. That means this function adopts "PixelFormat32bppPARGB" for "all" image/bitmap files, irrespective of the source and present pixelformat.
Does it have any side effects on other file formats?
Regards
G. N. Rao.
Hyderabad, India
G. N. Rao.
Hyderabad, India
nageswaragunupudi wrote:Mr Manuel
Bitmap* newImage = new Bitmap( nWidth, nHeight, PixelFormat32bppPARGB ) ; // cambio aqui ---- original->GetPixelFormat() );
This is the change you made. That means this function adopts "PixelFormat32bppPARGB" for "all" image/bitmap files, irrespective of the source and present pixelformat.
Does it have any side effects on other file formats?
I've been using it time and have not had any problems.
actually we assume that all "imported" to gdi+ is 32bit (highest quality) then return HBITMAP not had problem
One of the cases I can now recollect is non-alpha bmp files.
The hBitmap returned is an alpha bmp. We get into problem while rendering.
Regards
G. N. Rao.
Hyderabad, India
G. N. Rao.
Hyderabad, India
I confirm. All images loaded with GDI+ are "marked" as alphachannel even if they are not.
EMG
nageswaragunupudi wrote:One of the cases I can now recollect is non-alpha bmp files.
The hBitmap returned is an alpha bmp. We get into problem while rendering.
Yes, same case in GDIP_IMAGEFROMFILE -> BitmapFromStream ....
....
PixelFormat pf = original->GetPixelFormat();
if ( pf != PixelFormatUndefined && ( ! IsExtendedPixelFormat( pf ) ) )
{
newImage = new Bitmap( nWidth, nHeight, ( pf == PixelFormat32bppRGB ? PixelFormat32bppPARGB : pf ) );
if ( pf == PixelFormat32bppRGB ) // AlphaBmp: Need to do additional work
....
by now there have been no trouble for it.
another solution is to put a exception for gif.
Any news?
EMG
Nages and this solution?
.....
int nWidth = original->GetWidth() ;
int nHeight = original->GetHeight() ;
PixelFormat pf ;
if( strncmp( adr, "GIF", 3 ) != 0 ) // detect if file is a gif type.
pf = original->GetPixelFormat();
else
pf = PixelFormat32bppPARGB ;
Bitmap* newImage = new Bitmap( nWidth, nHeight, pf ) ;
Graphics * graphics = new Graphics( newImage );
.....Mr Manuel
So your proposal is to force 32bppPARGB for GIFs.
Done it.
Regards
G. N. Rao.
Hyderabad, India
G. N. Rao.
Hyderabad, India
I'm ready to test it.
EMG
nageswaragunupudi wrote:Mr Manuel
So your proposal is to force 32bppPARGB for GIFs.
Done it.
yes.
another option ...
pass a new parameter that specifies that we want to use 32 bits
.......
PixelFormat pf ;
   pf = original->GetPixelFormat();
Â
bool l32bpp = hb_parl( 2) Â
 if (  ( strncmp( adr, "GIF", 3 ) == 0  )  &  ( l32bpp == TRUE )  )
      pf = PixelFormat32bppPARGB ;
 Â
 Bitmap* newImage  = new Bitmap( nWidth, nHeight, pf ) ;
........Enrico . For your test ...
https://dl.dropboxusercontent.com/u/132931/gdiplus.obj
Cheers.
Probably I'm doing something wrong but it doesn't work (GIFs are still bad rendered).
EMG