BOOL nulldrv_AlphaBlend( PHYSDEV dst_dev, struct bitblt_coords *dst,
PHYSDEV src_dev, struct bitblt_coords *src, BLENDFUNCTION func )
{
DC *dc_src, *dc_dst = get_nulldrv_dc( dst_dev );
char src_buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
char dst_buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
BITMAPINFO *src_info = (BITMAPINFO *)src_buffer;
BITMAPINFO *dst_info = (BITMAPINFO *)dst_buffer;
DWORD err;
struct gdi_image_bits bits;
if (!(dc_src = get_dc_ptr( src_dev->hdc ))) return FALSE;
src_dev = GET_DC_PHYSDEV( dc_src, pGetImage );
err = src_dev->funcs->pGetImage( src_dev, src_info, &bits, src );
if (err) goto done;
dst_dev = GET_DC_PHYSDEV( dc_dst, pBlendImage );
copy_bitmapinfo( dst_info, src_info );
err = dst_dev->funcs->pBlendImage( dst_dev, dst_info, &bits, src, dst, func );
if (err == ERROR_BAD_FORMAT)
{
err = convert_bits( src_info, src, dst_info, &bits );
if (!err) err = dst_dev->funcs->pBlendImage( dst_dev, dst_info, &bits, src, dst, func );
}
if (err == ERROR_TRANSFORM_NOT_SUPPORTED &&
((src->width != dst->width) || (src->height != dst->height)))
{
copy_bitmapinfo( src_info, dst_info );
err = stretch_bits( src_info, src, dst_info, dst, &bits, COLORONCOLOR );
if (!err) err = dst_dev->funcs->pBlendImage( dst_dev, dst_info, &bits, src, dst, func );
}
if (bits.free) bits.free( &bits );
done:
release_dc_ptr( dc_src );
if (err) SetLastError( err );
return !err;
}
static void set_initial_bitmap_bits( HBITMAP hbitmap, BITMAPOBJ *bmp )
{
char src_bmibuf[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
BITMAPINFO *src_info = (BITMAPINFO *)src_bmibuf;
char dst_bmibuf[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
BITMAPINFO *dst_info = (BITMAPINFO *)dst_bmibuf;
DWORD err;
struct gdi_image_bits bits;
struct bitblt_coords src, dst;
if (!bmp->bitmap.bmBits) return;
if (bmp->funcs->pPutImage == nulldrv_PutImage) return;
get_ddb_bitmapinfo( bmp, src_info );
bits.ptr = bmp->bitmap.bmBits;
bits.is_copy = FALSE;
bits.free = NULL;
bits.param = NULL;
src.x = 0;
src.y = 0;
src.width = bmp->bitmap.bmWidth;
src.height = bmp->bitmap.bmHeight;
src.visrect.left = 0;
src.visrect.top = 0;
src.visrect.right = bmp->bitmap.bmWidth;
src.visrect.bottom = bmp->bitmap.bmHeight;
dst = src;
copy_bitmapinfo( dst_info, src_info );
err = bmp->funcs->pPutImage( NULL, hbitmap, 0, dst_info, &bits, &src, &dst, 0 );
if (err == ERROR_BAD_FORMAT)
{
err = convert_bits( src_info, &src, dst_info, &bits, FALSE );
if (!err) err = bmp->funcs->pPutImage( NULL, hbitmap, 0, dst_info, &bits, &src, &dst, 0 );
if (bits.free) bits.free( &bits );
}
}
BOOL nulldrv_StretchBlt( PHYSDEV dst_dev, struct bitblt_coords *dst,
PHYSDEV src_dev, struct bitblt_coords *src, DWORD rop )
{
DC *dc_src, *dc_dst = get_nulldrv_dc( dst_dev );
char src_buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
char dst_buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
BITMAPINFO *src_info = (BITMAPINFO *)src_buffer;
BITMAPINFO *dst_info = (BITMAPINFO *)dst_buffer;
DWORD err;
struct gdi_image_bits bits;
if (!(dc_src = get_dc_ptr( src_dev->hdc ))) return FALSE;
src_dev = GET_DC_PHYSDEV( dc_src, pGetImage );
if (src_dev->funcs->pGetImage( src_dev, src_info, &bits, src ))
{
release_dc_ptr( dc_src );
return FALSE;
}
dst_dev = GET_DC_PHYSDEV( dc_dst, pPutImage );
copy_bitmapinfo( dst_info, src_info );
err = dst_dev->funcs->pPutImage( dst_dev, 0, dst_info, &bits, src, dst, rop );
if (err == ERROR_BAD_FORMAT)
{
DWORD dst_colors = dst_info->bmiHeader.biClrUsed;
/* 1-bpp source without a color table uses the destination DC colors */
if (src_info->bmiHeader.biBitCount == 1 && !src_info->bmiHeader.biClrUsed)
get_mono_dc_colors( dst_dev->hdc, src_info, 2 );
if (dst_info->bmiHeader.biBitCount == 1 && !dst_colors)
{
/* 1-bpp destination without a color table requires a fake 1-entry table
* that contains only the background color; except with a 1-bpp source,
* in which case it uses the source colors */
if (src_info->bmiHeader.biBitCount > 1)
get_mono_dc_colors( src_dev->hdc, dst_info, 1 );
else
get_mono_dc_colors( src_dev->hdc, dst_info, 2 );
}
if (!(err = convert_bits( src_info, src, dst_info, &bits )))
{
/* get rid of the fake destination table */
dst_info->bmiHeader.biClrUsed = dst_colors;
err = dst_dev->funcs->pPutImage( dst_dev, 0, dst_info, &bits, src, dst, rop );
}
}
if (err == ERROR_TRANSFORM_NOT_SUPPORTED &&
((src->width != dst->width) || (src->height != dst->height)))
{
copy_bitmapinfo( src_info, dst_info );
err = stretch_bits( src_info, src, dst_info, dst, &bits, GetStretchBltMode( dst_dev->hdc ));
if (!err) err = dst_dev->funcs->pPutImage( dst_dev, 0, dst_info, &bits, src, dst, rop );
}
if (bits.free) bits.free( &bits );
release_dc_ptr( dc_src );
return !err;
}