Bad quality with GIF (and GDI+)

[nageswaragunupudi]

Probably I'm doing something wrong but it doesn't work (GIFs are still bad rendered).

EMG

With what control are you testing?

[Enrico Maria Giordano]

Just loading with GDIP_IMAGEFROMFILE().

EMG

[nageswaragunupudi]

Just sent you revised libs.

[Enrico Maria Giordano]

Received and already reported back.

EMG

[nageswaragunupudi]

Please try:

Code: Select all  Expand view

function testgif()

   local cFile    := "c:\fwh\gifs\magic10.gif"
   local hBmp, oWnd

   hBmp     := GDIP_IMAGEFROMFILE( cFile, .t. )

   DEFINE WINDOW oWnd
   ACTIVATE WINDOW oWnd CENTERED ON PAINT oWnd:SayPalBmp( hBmp )

   DeleteObject( hBmp )

return nil
 

[Enrico Maria Giordano]

I was not clear enough. The misalignment is between ResizeImg() and ResizeBmp().

EMG

[nageswaragunupudi]

I hope the quality issue is now resolved.

In any case, FWH libs are no more using ResizeImg or ResizeBmp for rendering resized images, except for Gray images. Whether both methods differ by a pixel or not now remains an academic issue. With your help, we now added resize width, height as 6,7th params to ABPaint()

Secondly, for bmp files FWH is using classic GDI but not GDI+. So for magic.bmp the FWH is using PalBmpRead() / ReadBmp()
oWnd:ReadPalBmpEx( uSource ) -> aBmpPal reads the image using the appropriate functions.
oWnd:SayPalBmp( aBmpPal/hBitmap, [aRect (default ClientRect)], [lTransparent (default .t. )], [lStretch/nResizeMode], [nAlpha/lAlpha],[lGray] )
paints the image using the appropriate painting function eg. ABPaint(), TransBmp(),PalBmpDraw()

For the sample you sent me, I suggest using FWH methods like this:

Code: Select all  Expand view

function magicbmp()

   local oDlg, aBmp
   local cFile := "c:\fwh\bitmaps\magic.bmp"

   DEFINE DIALOG oDlg SIZE 800,600 PIXEL

   aBmp  := oDlg:ReadPalBmpEx( cFile )

   ACTIVATE DIALOG oDlg ON PAINT ;
      oDlg:SayPalBmp( aBmp, ;
                      nil, ;  // Default full client Rect
                      .f., ;  // transparency
                      .t. )   // Stretch full ( .f. or nil -> centers image )

return nil
 

[Enrico Maria Giordano]

Rao,

ok for the quality issue. But saving to GIF still give bad result:

Code: Select all  Expand view

#include "Fivewin.ch"


FUNCTION MAIN()

    LOCAL cSrcImage := "c:\fwh\bitmaps\magic.bmp"
    LOCAL cDstImage := "magic.gif"

    LOCAL oGdi := GDIBmp():New( cSrcImage )

    oGdi:Save( cDstImage )

    oGdi:End()

    RETURN NIL

EMG

[Enrico Maria Giordano]

Rao,

you showed us your face, at last!

EMG

[Enrico Maria Giordano]

Rao,

ok for the quality issue. But saving to GIF still give bad result:

Code: Select all  Expand view

#include "Fivewin.ch"


FUNCTION MAIN()

    LOCAL cSrcImage := "c:\fwh\bitmaps\magic.bmp"
    LOCAL cDstImage := "magic.gif"

    LOCAL oGdi := GDIBmp():New( cSrcImage )

    oGdi:Save( cDstImage )

    oGdi:End()

    RETURN NIL

EMG

Any news?

EMG