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

[Alexandre Julliard]

Module: wine
Branch: master
Commit: bfdac3e885f12dfd4b16c0c16f4767c451d0994d
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=bfdac3e885f12dfd4b16c0c16f...

Author: Alexandre Julliard <julliard(a)winehq.org>
Date:   Mon Oct 17 13:25:05 2011 +0200

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

---

 dlls/gdi32/bitblt.c        |   63 ++++++++++++++++++++++++++++++++++++++++++++
 dlls/gdi32/dibdrv/bitblt.c |   14 ++++++++++
 dlls/gdi32/driver.c        |    6 ----
 dlls/gdi32/gdi_private.h   |    5 +++
 4 files changed, 82 insertions(+), 6 deletions(-)

diff --git a/dlls/gdi32/bitblt.c b/dlls/gdi32/bitblt.c
index eee6fa2..28b1a73 100644
--- a/dlls/gdi32/bitblt.c
+++ b/dlls/gdi32/bitblt.c
@@ -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.@)
  */
diff --git a/dlls/gdi32/dibdrv/bitblt.c b/dlls/gdi32/dibdrv/bitblt.c
index bf1256e..de60f47 100644
--- a/dlls/gdi32/dibdrv/bitblt.c
+++ b/dlls/gdi32/dibdrv/bitblt.c
@@ -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
  */
diff --git a/dlls/gdi32/driver.c b/dlls/gdi32/driver.c
index 4f111c3..8647b95 100644
--- a/dlls/gdi32/driver.c
+++ b/dlls/gdi32/driver.c
@@ -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;
diff --git a/dlls/gdi32/gdi_private.h b/dlls/gdi32/gdi_private.h
index 76e146b..d8648ef 100644
--- a/dlls/gdi32/gdi_private.h
+++ b/dlls/gdi32/gdi_private.h
@@ -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;