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gdi32: Add a fall back implementation of BlendImage using client-side blending.

This commit is contained in:
Alexandre Julliard 2011-10-17 13:25:05 +02:00
parent 6ca6464cf3
commit bfdac3e885
4 changed files with 82 additions and 6 deletions
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63
dlls/gdi32/bitblt.c
View File

@ -198,6 +198,24 @@ static DWORD stretch_bits( const BITMAPINFO *src_info, struct bitblt_coords *src
return err;
}
static DWORD blend_bits( const BITMAPINFO *src_info, const struct gdi_image_bits *src_bits,
struct bitblt_coords *src, BITMAPINFO *dst_info,
struct gdi_image_bits *dst_bits, struct bitblt_coords *dst, BLENDFUNCTION blend )
{
if (!dst_bits->is_copy)
{
int size = get_dib_image_size( dst_info );
void *ptr = HeapAlloc( GetProcessHeap(), 0, size );
if (!ptr) return ERROR_OUTOFMEMORY;
memcpy( ptr, dst_bits->ptr, size );
if (dst_bits->free) dst_bits->free( dst_bits );
dst_bits->ptr = ptr;
dst_bits->is_copy = TRUE;
dst_bits->free = free_heap_bits;
}
return blend_bitmapinfo( src_info, src_bits->ptr, src, dst_info, dst_bits->ptr, dst, blend );
}
/***********************************************************************
* null driver fallback implementations
*/
@ -328,6 +346,51 @@ done:
}
DWORD nulldrv_BlendImage( PHYSDEV dev, BITMAPINFO *info, const struct gdi_image_bits *bits,
struct bitblt_coords *src, struct bitblt_coords *dst, BLENDFUNCTION blend )
{
char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
BITMAPINFO *dst_info = (BITMAPINFO *)buffer;
struct gdi_image_bits dst_bits;
struct bitblt_coords orig_dst;
DC *dc = get_nulldrv_dc( dev );
DWORD err;
if (info->bmiHeader.biPlanes != 1) goto update_format;
if (info->bmiHeader.biBitCount != 32) goto update_format;
if (info->bmiHeader.biCompression == BI_BITFIELDS)
{
DWORD *masks = (DWORD *)info->bmiColors;
if (masks[0] != 0xff0000 || masks[1] != 0x00ff00 || masks[2] != 0x0000ff)
goto update_format;
}
if (!bits) return ERROR_SUCCESS;
if ((src->width != dst->width) || (src->height != dst->height)) return ERROR_TRANSFORM_NOT_SUPPORTED;
dev = GET_DC_PHYSDEV( dc, pGetImage );
orig_dst = *dst;
err = dev->funcs->pGetImage( dev, 0, dst_info, &dst_bits, dst );
if (err) return err;
dev = GET_DC_PHYSDEV( dc, pPutImage );
err = blend_bits( info, bits, src, dst_info, &dst_bits, dst, blend );
if (!err) err = dev->funcs->pPutImage( dev, 0, 0, dst_info, &dst_bits, dst, &orig_dst, SRCCOPY );
if (dst_bits.free) dst_bits.free( &dst_bits );
return err;
update_format:
if (blend.AlphaFormat & AC_SRC_ALPHA) /* source alpha requires A8R8G8B8 format */
return ERROR_INVALID_PARAMETER;
info->bmiHeader.biPlanes = 1;
info->bmiHeader.biBitCount = 32;
info->bmiHeader.biCompression = BI_RGB;
info->bmiHeader.biClrUsed = 0;
return ERROR_BAD_FORMAT;
}
/***********************************************************************
* PatBlt (GDI32.@)
*/

14
dlls/gdi32/dibdrv/bitblt.c
View File

@ -1202,6 +1202,20 @@ DWORD stretch_bitmapinfo( const BITMAPINFO *src_info, void *src_bits, struct bit
return ERROR_SUCCESS;
}
DWORD blend_bitmapinfo( const BITMAPINFO *src_info, void *src_bits, struct bitblt_coords *src,
const BITMAPINFO *dst_info, void *dst_bits, struct bitblt_coords *dst,
BLENDFUNCTION blend )
{
dib_info src_dib, dst_dib;
if (!init_dib_info_from_bitmapinfo( &src_dib, src_info, src_bits, 0 ) )
return ERROR_BAD_FORMAT;
if (!init_dib_info_from_bitmapinfo( &dst_dib, dst_info, dst_bits, 0 ) )
return ERROR_BAD_FORMAT;
return blend_rect( &dst_dib, &dst->visrect, &src_dib, &src->visrect, NULL, blend );
}
/***********************************************************************
* dibdrv_StretchBlt
*/

6
dlls/gdi32/driver.c
View File

@ -196,12 +196,6 @@ static BOOL nulldrv_Arc( PHYSDEV dev, INT left, INT top, INT right, INT bottom,
return TRUE;
}
static DWORD nulldrv_BlendImage( PHYSDEV dev, BITMAPINFO *info, const struct gdi_image_bits *bits,
struct bitblt_coords *src, struct bitblt_coords *dst, BLENDFUNCTION func )
{
return TRUE;
}
static INT nulldrv_ChoosePixelFormat( PHYSDEV dev, const PIXELFORMATDESCRIPTOR *descr )
{
return 0;

5
dlls/gdi32/gdi_private.h
View File

@ -257,6 +257,9 @@ extern DWORD convert_bitmapinfo( const BITMAPINFO *src_info, void *src_bits, str
extern DWORD stretch_bitmapinfo( const BITMAPINFO *src_info, void *src_bits, struct bitblt_coords *src,
const BITMAPINFO *dst_info, void *dst_bits, struct bitblt_coords *dst,
INT mode ) DECLSPEC_HIDDEN;
extern DWORD blend_bitmapinfo( const BITMAPINFO *src_info, void *src_bits, struct bitblt_coords *src,
const BITMAPINFO *dst_info, void *dst_bits, struct bitblt_coords *dst,
BLENDFUNCTION blend ) DECLSPEC_HIDDEN;
/* driver.c */
extern const DC_FUNCTIONS null_driver DECLSPEC_HIDDEN;
@ -388,6 +391,8 @@ extern BOOL nulldrv_AlphaBlend( PHYSDEV dst_dev, struct bitblt_coords *dst,
extern BOOL nulldrv_AngleArc( PHYSDEV dev, INT x, INT y, DWORD radius, FLOAT start, FLOAT sweep ) DECLSPEC_HIDDEN;
extern BOOL nulldrv_ArcTo( PHYSDEV dev, INT left, INT top, INT right, INT bottom, INT xstart, INT ystart, INT xend, INT yend ) DECLSPEC_HIDDEN;
extern BOOL nulldrv_BeginPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
extern DWORD nulldrv_BlendImage( PHYSDEV dev, BITMAPINFO *info, const struct gdi_image_bits *bits,
struct bitblt_coords *src, struct bitblt_coords *dst, BLENDFUNCTION func ) DECLSPEC_HIDDEN;
extern BOOL nulldrv_CloseFigure( PHYSDEV dev ) DECLSPEC_HIDDEN;
extern BOOL nulldrv_EndPath( PHYSDEV dev ) DECLSPEC_HIDDEN;
extern INT nulldrv_ExcludeClipRect( PHYSDEV dev, INT left, INT top, INT right, INT bottom ) DECLSPEC_HIDDEN;