Scol

Did you check the function code ?

Ho no this is not a bug.
_CPbitmap24 copy an objBitmap not an alphaBitmap

An alphaBitmap is composed of an objBitmap and an objBitmap8 for alpha channel.
so to copy an alphaBitmap you must get the separated components and copy the ObjBitmap and then the ObjBitmap8 to finally recreate an alphaBitmap.

or what you mean by "Transparency" is something else ?

arkeon wrote:

Ho no this is not a bug.
_CPbitmap24 copy an objBitmap not an alphaBitmap

An alphaBitmap is composed of an objBitmap and an objBitmap8 for alpha channel.
so to copy an alphaBitmap you must get the separated components and copy the ObjBitmap and then the ObjBitmap8 to finally recreate an alphaBitmap.

or what you mean by "Transparency" is something else ?

The transparency is the color transparency parameter which tells what should be copied or not from the source bitmap. So nothing to do with alphabitmaps, just with basic bitmaps (ObjBitmap)

tony wrote:

arkeon wrote:

Ho no this is not a bug.
_CPbitmap24 copy an objBitmap not an alphaBitmap

An alphaBitmap is composed of an objBitmap and an objBitmap8 for alpha channel.
so to copy an alphaBitmap you must get the separated components and copy the ObjBitmap and then the ObjBitmap8 to finally recreate an alphaBitmap.

or what you mean by "Transparency" is something else ?

The transparency is the color transparency parameter which tells what should be copied or not from the source bitmap. So nothing to do with alphabitmaps, just with basic bitmaps (ObjBitmap)

I assigned this bug to myself. I'll have a look at it as soon as possible.

srcColor = _COLOR_BGR_TO_I ((char)BS->bits[scx], (char)BS->bits[scx+1], (char)BS->bits[scx+2]);
if ((couleur == NIL) || (srcColor != couleur)) {
BD->bits [ dcx ] = BS->bits [ scx ] ;
BD->bits [ dcx+1 ] = BS->bits [ scx+1 ] ;
BD->bits [ dcx+2 ] = BS->bits [ scx+2 ] ;
}

a small debug with _COLOR_BGR_TO_I comparison value should be easy.

arkeon wrote:

srcColor = _COLOR_BGR_TO_I ((char)BS->bits[scx], (char)BS->bits[scx+1], (char)BS->bits[scx+2]);
if ((couleur == NIL) || (srcColor != couleur)) {
BD->bits [ dcx ] = BS->bits [ scx ] ;
BD->bits [ dcx+1 ] = BS->bits [ scx+1 ] ;
BD->bits [ dcx+2 ] = BS->bits [ scx+2 ] ;
}

a small debug with _COLOR_BGR_TO_I comparison value should be easy.

Which file and which function ? please...

I had a very quick look (no real debugging) at the LIBOS2D dll and found functions that properly (or so it seemed) used the "couleur" (color) variable. But there must be some corruption somewhere.

bitmap.c

function GRCopyBitmap line 3608