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gdi32: Add a null driver StretchBlt fallback using GetImage/PutImage.

This commit is contained in:
Alexandre Julliard 2011-07-14 12:19:13 +02:00
parent cf05fca878
commit 79d3f29061
1 changed files with 65 additions and 16 deletions
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81
dlls/gdi32/bitblt.c
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@ -164,48 +164,97 @@ static void get_vis_rectangles( DC *dc_dst, struct bitblt_coords *dst,
}
}
static DWORD convert_bits( const BITMAPINFO *src_info, struct gdi_image_bits *src_bits,
const RECT *src_rect, BITMAPINFO *dst_info, struct gdi_image_bits *dst_bits )
{
FIXME( "%u -> %u not implemented\n", src_info->bmiHeader.biBitCount, dst_info->bmiHeader.biBitCount );
dst_bits->ptr = src_bits->ptr;
dst_bits->offset = src_bits->offset;
dst_bits->is_copy = src_bits->is_copy;
dst_bits->free = NULL;
return ERROR_SUCCESS;
}
/* nulldrv fallback implementation using StretchDIBits */
BOOL nulldrv_StretchBlt( PHYSDEV dst_dev, struct bitblt_coords *dst,
PHYSDEV src_dev, struct bitblt_coords *src, DWORD rop )
{
DC *dc = get_nulldrv_dc( dst_dev );
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 src_bits, dst_bits;
BITMAP bm;
BITMAPINFOHEADER info_hdr;
HBITMAP hbm;
LPVOID bits;
INT lines;
if (dst->visrect.left >= dst->visrect.right || dst->visrect.top >= dst->visrect.bottom) return TRUE;
/* make sure we have a real implementation for StretchDIBits */
if (GET_DC_PHYSDEV( dc, pStretchDIBits ) == dst_dev) return 0;
if (GET_DC_PHYSDEV( dc_dst, pStretchDIBits ) == dst_dev) goto try_get_image;
if (GetObjectType( src_dev->hdc ) != OBJ_MEMDC) return FALSE;
if (!GetObjectW( GetCurrentObject( src_dev->hdc, OBJ_BITMAP ), sizeof(bm), &bm )) return FALSE;
info_hdr.biSize = sizeof(info_hdr);
info_hdr.biWidth = bm.bmWidth;
info_hdr.biHeight = bm.bmHeight;
info_hdr.biPlanes = 1;
info_hdr.biBitCount = 32;
info_hdr.biCompression = BI_RGB;
info_hdr.biSizeImage = 0;
info_hdr.biXPelsPerMeter = 0;
info_hdr.biYPelsPerMeter = 0;
info_hdr.biClrUsed = 0;
info_hdr.biClrImportant = 0;
src_info->bmiHeader.biSize = sizeof(src_info->bmiHeader);
src_info->bmiHeader.biWidth = bm.bmWidth;
src_info->bmiHeader.biHeight = bm.bmHeight;
src_info->bmiHeader.biPlanes = 1;
src_info->bmiHeader.biBitCount = 32;
src_info->bmiHeader.biCompression = BI_RGB;
src_info->bmiHeader.biSizeImage = 0;
src_info->bmiHeader.biXPelsPerMeter = 0;
src_info->bmiHeader.biYPelsPerMeter = 0;
src_info->bmiHeader.biClrUsed = 0;
src_info->bmiHeader.biClrImportant = 0;
if (!(bits = HeapAlloc(GetProcessHeap(), 0, bm.bmHeight * bm.bmWidth * 4)))
return FALSE;
/* Select out the src bitmap before calling GetDIBits */
hbm = SelectObject( src_dev->hdc, GetStockObject(DEFAULT_BITMAP) );
lines = GetDIBits( src_dev->hdc, hbm, 0, bm.bmHeight, bits, (BITMAPINFO*)&info_hdr, DIB_RGB_COLORS );
lines = GetDIBits( src_dev->hdc, hbm, 0, bm.bmHeight, bits, src_info, DIB_RGB_COLORS );
SelectObject( src_dev->hdc, hbm );
if (lines) lines = StretchDIBits( dst_dev->hdc, dst->log_x, dst->log_y, dst->log_width, dst->log_height,
src->x, bm.bmHeight - src->height - src->y, src->width, src->height,
bits, (BITMAPINFO*)&info_hdr, DIB_RGB_COLORS, rop );
bits, src_info, DIB_RGB_COLORS, rop );
HeapFree( GetProcessHeap(), 0, bits );
return (lines == src->height);
try_get_image:
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, 0, src_info, &src_bits, &src->visrect );
release_dc_ptr( dc_src );
if (err) return FALSE;
dst_dev = GET_DC_PHYSDEV( dc_dst, pPutImage );
if ((src->width != dst->width) || (src->height != dst->height))
FIXME( "should stretch %dx%d -> %dx%d\n",
src->width, src->height, dst->width, dst->height );
memcpy( dst_info, src_info, FIELD_OFFSET( BITMAPINFO, bmiColors[256] ));
err = dst_dev->funcs->pPutImage( dst_dev, 0, dst_info, &src_bits, &dst->visrect, rop );
if (err == ERROR_BAD_FORMAT)
{
RECT src_rect = src->visrect;
offset_rect( &src_rect, src_bits.offset - src->visrect.left, -src->visrect.top );
err = convert_bits( src_info, &src_bits, &src_rect, dst_info, &dst_bits );
if (!err)
{
err = dst_dev->funcs->pPutImage( dst_dev, 0, dst_info, &dst_bits, &dst->visrect, rop );
if (dst_bits.free) dst_bits.free( &dst_bits );
}
}
if (src_bits.free) src_bits.free( &src_bits );
return !err;
}
/***********************************************************************