[PATCH 2/3] comctl32: Create an internal copy for 32-bpp bitmaps with an alpha channel for Static control.
Signed-off-by: Dmitry Timoshkov dmitry@baikal.ru --- dlls/comctl32/static.c | 79 ++++++++++++++++++++++++++++++++++-- dlls/comctl32/tests/static.c | 7 +--- 2 files changed, 77 insertions(+), 9 deletions(-)
diff --git a/dlls/comctl32/static.c b/dlls/comctl32/static.c index d08710c06f..b3254e5761 100644 --- a/dlls/comctl32/static.c +++ b/dlls/comctl32/static.c @@ -60,6 +60,7 @@ struct static_extra_info HBITMAP hbitmap; HENHMETAFILE hemf; } image; + BOOL image_has_alpha; };
typedef void (*pfPaint)( HWND hwnd, HDC hdc, DWORD style ); @@ -163,6 +164,52 @@ static HICON STATIC_SetIcon( HWND hwnd, HICON hicon, DWORD style ) return prevIcon; }
+static HBITMAP create_alpha_bitmap( HBITMAP hbitmap ) +{ + BITMAP bm; + HBITMAP alpha; + BITMAPINFO info; + HDC hdc; + void *bits; + DWORD i; + BYTE *ptr; + BOOL has_alpha = FALSE; + + GetObjectW( hbitmap, sizeof(bm), &bm ); + if (bm.bmBitsPixel != 32) return 0; + + if (!(hdc = CreateCompatibleDC( 0 ))) return 0; + + info.bmiHeader.biSize = sizeof(BITMAPINFOHEADER); + info.bmiHeader.biWidth = bm.bmWidth; + info.bmiHeader.biHeight = -bm.bmHeight; + info.bmiHeader.biPlanes = 1; + info.bmiHeader.biBitCount = 32; + info.bmiHeader.biCompression = BI_RGB; + info.bmiHeader.biSizeImage = bm.bmWidth * bm.bmHeight * 4; + info.bmiHeader.biXPelsPerMeter = 0; + info.bmiHeader.biYPelsPerMeter = 0; + info.bmiHeader.biClrUsed = 0; + info.bmiHeader.biClrImportant = 0; + if ((alpha = CreateDIBSection( hdc, &info, DIB_RGB_COLORS, &bits, NULL, 0 ))) + { + GetDIBits( hdc, hbitmap, 0, bm.bmHeight, bits, &info, DIB_RGB_COLORS ); + + for (i = 0, ptr = bits; i < bm.bmWidth * bm.bmHeight; i++, ptr += 4) + if ((has_alpha = (ptr[3] != 0))) break; + + if (!has_alpha) + { + DeleteObject( alpha ); + alpha = 0; + } + } + + DeleteDC( hdc ); + + return alpha; +} + /*********************************************************************** * STATIC_SetBitmap * @@ -170,7 +217,7 @@ static HICON STATIC_SetIcon( HWND hwnd, HICON hicon, DWORD style ) */ static HBITMAP STATIC_SetBitmap( HWND hwnd, HBITMAP hBitmap, DWORD style ) { - HBITMAP hOldBitmap; + HBITMAP hOldBitmap, alpha; struct static_extra_info *extra;
if ((style & SS_TYPEMASK) != SS_BITMAP) return 0; @@ -185,10 +232,23 @@ static HBITMAP STATIC_SetBitmap( HWND hwnd, HBITMAP hBitmap, DWORD style )
hOldBitmap = extra->image.hbitmap; extra->image.hbitmap = hBitmap; + extra->image_has_alpha = FALSE; + + if (hBitmap) + { + alpha = create_alpha_bitmap( hBitmap ); + if (alpha) + { + extra->image.hbitmap = alpha; + extra->image_has_alpha = TRUE; + } + } + if (hBitmap && !(style & SS_CENTERIMAGE) && !(style & SS_REALSIZECONTROL)) { BITMAP bm; GetObjectW(hBitmap, sizeof(bm), &bm); + /* Windows currently doesn't implement SS_RIGHTJUST */ /* if ((style & SS_RIGHTJUST) != 0) @@ -386,7 +446,12 @@ static LRESULT CALLBACK STATIC_WindowProc( HWND hwnd, UINT uMsg, WPARAM wParam, if (style == SS_ICON) { struct static_extra_info *extra = get_extra_ptr( hwnd, FALSE ); - heap_free( extra ); + if (extra) + { + if (extra->image_has_alpha) + DeleteObject( extra->image.hbitmap ); + heap_free( extra ); + } /* * FIXME * DestroyIcon32( STATIC_SetIcon( wndPtr, 0 ) ); @@ -765,6 +830,8 @@ static void STATIC_PaintBitmapfn(HWND hwnd, HDC hdc, DWORD style ) BITMAP bm; RECT rcClient; LOGBRUSH brush; + BLENDFUNCTION blend = { AC_SRC_OVER, 0, 255, AC_SRC_ALPHA }; + struct static_extra_info *extra = get_extra_ptr( hwnd, FALSE );
GetObjectW(hBitmap, sizeof(bm), &bm); oldbitmap = SelectObject(hMemDC, hBitmap); @@ -785,7 +852,13 @@ static void STATIC_PaintBitmapfn(HWND hwnd, HDC hdc, DWORD style ) rcClient.right = rcClient.left + bm.bmWidth; rcClient.bottom = rcClient.top + bm.bmHeight; } - StretchBlt(hdc, rcClient.left, rcClient.top, rcClient.right - rcClient.left, + + if (extra->image_has_alpha) + GdiAlphaBlend(hdc, rcClient.left, rcClient.top, rcClient.right - rcClient.left, + rcClient.bottom - rcClient.top, hMemDC, + 0, 0, bm.bmWidth, bm.bmHeight, blend); + else + StretchBlt(hdc, rcClient.left, rcClient.top, rcClient.right - rcClient.left, rcClient.bottom - rcClient.top, hMemDC, 0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY); SelectObject(hMemDC, oldbitmap); diff --git a/dlls/comctl32/tests/static.c b/dlls/comctl32/tests/static.c index 0e44c4ed7a..0b990d6b39 100644 --- a/dlls/comctl32/tests/static.c +++ b/dlls/comctl32/tests/static.c @@ -147,18 +147,15 @@ static void test_image(HBITMAP image, BOOL is_dib, BOOL is_premult) ok(bm.bmBitsPixel == 32, "got %d\n", bm.bmBitsPixel); if (is_dib) { -todo_wine ok(bm.bmBits != NULL, "bmBits is NULL\n"); -if (bm.bmBits) -{ memcpy(bits, bm.bmBits, 4); if (is_premult) +todo_wine ok(bits[0] == 0x05 && bits[1] == 0x09 && bits[2] == 0x0e && bits[3] == 0x44, "bits: %02x %02x %02x %02x\n", bits[0], bits[1], bits[2], bits[3]); else ok(bits[0] == 0x11 && bits[1] == 0x22 && bits[2] == 0x33 && bits[3] == 0x44, "bits: %02x %02x %02x %02x\n", bits[0], bits[1], bits[2], bits[3]); -} } else ok(bm.bmBits == NULL, "bmBits is not NULL\n"); @@ -206,13 +203,11 @@ static void test_set_image(void)
bmp1 = (HBITMAP)SendMessageW(hwnd, STM_GETIMAGE, IMAGE_BITMAP, 0); ok(bmp1 != NULL, "got NULL\n"); -todo_wine ok(bmp1 != image, "bmp == image\n"); test_image(bmp1, TRUE, TRUE);
bmp2 = (HBITMAP)SendMessageW(hwnd, STM_SETIMAGE, IMAGE_BITMAP, (LPARAM)image); ok(bmp2 != NULL, "got NULL\n"); -todo_wine ok(bmp2 != image, "bmp == image\n"); ok(bmp1 == bmp2, "bmp1 != bmp2\n"); test_image(bmp2, TRUE, TRUE);
-
Dmitry Timoshkov