[PATCH] Added DrawIconEx alpha blending support
Joel Holdsworth
joel at airwebreathe.org.uk
Sun May 31 10:52:48 CDT 2009
---
dlls/user32/cursoricon.c | 102 +++++++++++++++++++++++++++++-----------
dlls/user32/tests/cursoricon.c | 26 ++++------
2 files changed, 85 insertions(+), 43 deletions(-)
diff --git a/dlls/user32/cursoricon.c b/dlls/user32/cursoricon.c
index 7f56648..92446e1 100644
--- a/dlls/user32/cursoricon.c
+++ b/dlls/user32/cursoricon.c
@@ -2273,25 +2273,33 @@ BOOL WINAPI DrawIconEx( HDC hdc, INT x0, INT y0, HICON hIcon,
INT cxWidth, INT cyWidth, UINT istep,
HBRUSH hbr, UINT flags )
{
- CURSORICONINFO *ptr = GlobalLock16(HICON_16(hIcon));
+ CURSORICONINFO *ptr;
HDC hDC_off = 0, hMemDC;
BOOL result = FALSE, DoOffscreen;
HBITMAP hB_off = 0, hOld = 0;
+ unsigned char *xorBitmapBits;
+ unsigned int xorLength;
+ BOOL has_alpha = FALSE;
- if (!ptr) return FALSE;
TRACE_(icon)("(hdc=%p,pos=%d.%d,hicon=%p,extend=%d.%d,istep=%d,br=%p,flags=0x%08x)\n",
hdc,x0,y0,hIcon,cxWidth,cyWidth,istep,hbr,flags );
- hMemDC = CreateCompatibleDC (hdc);
+ if (!(ptr = GlobalLock16(HICON_16(hIcon)))) return FALSE;
+ if (!(hMemDC = CreateCompatibleDC( hdc ))) return FALSE;
+
if (istep)
FIXME_(icon)("Ignoring istep=%d\n", istep);
if (flags & DI_NOMIRROR)
FIXME_(icon)("Ignoring flag DI_NOMIRROR\n");
- if (!flags) {
- FIXME_(icon)("no flags set? setting to DI_NORMAL\n");
- flags = DI_NORMAL;
- }
+ xorLength = ptr->nHeight * get_bitmap_width_bytes(
+ ptr->nWidth, ptr->bBitsPerPixel);
+ xorBitmapBits = (unsigned char *)(ptr + 1) + ptr->nHeight *
+ get_bitmap_width_bytes(ptr->nWidth, 1);
+
+ if (flags & DI_IMAGE)
+ has_alpha = bitmap_has_alpha_channel(
+ ptr->bBitsPerPixel, xorBitmapBits, xorLength);
/* Calculate the size of the destination image. */
if (cxWidth == 0)
@@ -2329,50 +2337,90 @@ BOOL WINAPI DrawIconEx( HDC hdc, INT x0, INT y0, HICON hIcon,
if (hMemDC && (!DoOffscreen || (hDC_off && hB_off)))
{
- HBITMAP hXorBits, hAndBits;
+ HBITMAP hBitTemp;
+ HBITMAP hXorBits = NULL, hAndBits = NULL;
COLORREF oldFg, oldBg;
INT nStretchMode;
nStretchMode = SetStretchBltMode (hdc, STRETCH_DELETESCANS);
- hXorBits = CreateBitmap ( ptr->nWidth, ptr->nHeight,
- ptr->bPlanes, ptr->bBitsPerPixel,
- (char *)(ptr + 1)
- + ptr->nHeight *
- get_bitmap_width_bytes(ptr->nWidth,1) );
- hAndBits = CreateBitmap ( ptr->nWidth, ptr->nHeight, 1, 1, ptr + 1 );
oldFg = SetTextColor( hdc, RGB(0,0,0) );
oldBg = SetBkColor( hdc, RGB(255,255,255) );
- if (hXorBits && hAndBits)
+ if (((flags & DI_MASK) && !(flags & DI_IMAGE)) ||
+ ((flags & DI_MASK) && !has_alpha))
{
- HBITMAP hBitTemp = SelectObject( hMemDC, hAndBits );
- if (flags & DI_MASK)
+ hAndBits = CreateBitmap ( ptr->nWidth, ptr->nHeight, 1, 1, ptr + 1 );
+ if (hAndBits)
{
+ hBitTemp = SelectObject( hMemDC, hAndBits );
if (DoOffscreen)
StretchBlt (hDC_off, 0, 0, cxWidth, cyWidth,
hMemDC, 0, 0, ptr->nWidth, ptr->nHeight, SRCAND);
else
StretchBlt (hdc, x0, y0, cxWidth, cyWidth,
hMemDC, 0, 0, ptr->nWidth, ptr->nHeight, SRCAND);
+ SelectObject( hMemDC, hBitTemp );
}
- SelectObject( hMemDC, hXorBits );
- if (flags & DI_IMAGE)
+ }
+
+ if (flags & DI_IMAGE)
+ {
+ BITMAPINFOHEADER bmih;
+ unsigned char *dibBits;
+
+ memset(&bmih, 0, sizeof(BITMAPINFOHEADER));
+ bmih.biSize = sizeof(BITMAPINFOHEADER);
+ bmih.biWidth = ptr->nWidth;
+ bmih.biHeight = -ptr->nHeight;
+ bmih.biPlanes = ptr->bPlanes;
+ bmih.biBitCount = ptr->bBitsPerPixel;
+ bmih.biCompression = BI_RGB;
+
+ hXorBits = CreateDIBSection(hdc, (BITMAPINFO*)&bmih, DIB_RGB_COLORS,
+ (void*)&dibBits, NULL, 0);
+
+ if (hXorBits && dibBits)
{
- if (DoOffscreen)
- StretchBlt (hDC_off, 0, 0, cxWidth, cyWidth,
- hMemDC, 0, 0, ptr->nWidth, ptr->nHeight, SRCPAINT);
+ if(has_alpha)
+ {
+ BLENDFUNCTION pixelblend = { AC_SRC_OVER, 0, 255, AC_SRC_ALPHA };
+
+ /* Do the alpha blending render */
+ premultiply_alpha_channel(dibBits, xorBitmapBits, xorLength);
+ hBitTemp = SelectObject( hMemDC, hXorBits );
+
+ if (DoOffscreen)
+ GdiAlphaBlend(hDC_off, 0, 0, cxWidth, cyWidth, hMemDC,
+ 0, 0, ptr->nWidth, ptr->nHeight, pixelblend);
+ else
+ GdiAlphaBlend(hdc, x0, y0, cxWidth, cyWidth, hMemDC,
+ 0, 0, ptr->nWidth, ptr->nHeight, pixelblend);
+
+ SelectObject( hMemDC, hBitTemp );
+ }
else
- StretchBlt (hdc, x0, y0, cxWidth, cyWidth,
- hMemDC, 0, 0, ptr->nWidth, ptr->nHeight, SRCPAINT);
+ {
+ memcpy(dibBits, xorBitmapBits, xorLength);
+ hBitTemp = SelectObject( hMemDC, hXorBits );
+ if (DoOffscreen)
+ StretchBlt (hDC_off, 0, 0, cxWidth, cyWidth,
+ hMemDC, 0, 0, ptr->nWidth, ptr->nHeight, SRCPAINT);
+ else
+ StretchBlt (hdc, x0, y0, cxWidth, cyWidth,
+ hMemDC, 0, 0, ptr->nWidth, ptr->nHeight, SRCPAINT);
+ SelectObject( hMemDC, hBitTemp );
+ }
+
+ DeleteObject( hXorBits );
}
- SelectObject( hMemDC, hBitTemp );
- result = TRUE;
}
+ result = TRUE;
+
SetTextColor( hdc, oldFg );
SetBkColor( hdc, oldBg );
- if (hXorBits) DeleteObject( hXorBits );
+
if (hAndBits) DeleteObject( hAndBits );
SetStretchBltMode (hdc, nStretchMode);
if (DoOffscreen) {
diff --git a/dlls/user32/tests/cursoricon.c b/dlls/user32/tests/cursoricon.c
index 1e6d87e..d57395b 100644
--- a/dlls/user32/tests/cursoricon.c
+++ b/dlls/user32/tests/cursoricon.c
@@ -1172,11 +1172,8 @@ static void test_DrawIconEx(void)
bmpOld = SelectObject(hdcDst, bmpDst);
/* Test null, image only, and mask only drawing */
- todo_wine
- {
- check_DrawIconEx(hdcDst, FALSE, 0x00A0B0C0, 32, 0, 0x00102030, 0x00102030, 0x00102030, __LINE__);
- check_DrawIconEx(hdcDst, TRUE, 0x00A0B0C0, 32, 0, 0x00102030, 0x00102030, 0x00102030, __LINE__);
- }
+ check_DrawIconEx(hdcDst, FALSE, 0x00A0B0C0, 32, 0, 0x00102030, 0x00102030, 0x00102030, __LINE__);
+ check_DrawIconEx(hdcDst, TRUE, 0x00A0B0C0, 32, 0, 0x00102030, 0x00102030, 0x00102030, __LINE__);
check_DrawIconEx(hdcDst, FALSE, 0x80A0B0C0, 32, DI_MASK, 0x00FFFFFF, 0x00000000, 0x00000000, __LINE__);
check_DrawIconEx(hdcDst, TRUE, 0x80A0B0C0, 32, DI_MASK, 0x00FFFFFF, 0x00FFFFFF, 0x00FFFFFF, __LINE__);
@@ -1194,25 +1191,22 @@ static void test_DrawIconEx(void)
/* Test alpha blending */
/* Windows 2000 and up will alpha blend, earlier Windows versions will not */
- todo_wine check_DrawIconEx(hdcDst, TRUE, 0xFFA0B0C0, 32, DI_NORMAL, 0x00FFFFFF, 0x00C0B0A0, 0x003F4F5F, __LINE__);
+ check_DrawIconEx(hdcDst, TRUE, 0xFFA0B0C0, 32, DI_NORMAL, 0x00FFFFFF, 0x00C0B0A0, 0x003F4F5F, __LINE__);
- todo_wine
- {
- check_DrawIconEx(hdcDst, FALSE, 0x80A0B0C0, 32, DI_NORMAL, 0x00000000, 0x00605850, 0x00C0B0A0, __LINE__);
- check_DrawIconEx(hdcDst, TRUE, 0x80A0B0C0, 32, DI_NORMAL, 0x00000000, 0x00605850, 0x00C0B0A0, __LINE__);
- check_DrawIconEx(hdcDst, FALSE, 0x80A0B0C0, 32, DI_NORMAL, 0x00FFFFFF, 0x00DFD7CF, 0x00C0B0A0, __LINE__);
- check_DrawIconEx(hdcDst, TRUE, 0x80A0B0C0, 32, DI_NORMAL, 0x00FFFFFF, 0x00DFD7CF, 0x003F4F5F, __LINE__);
+ check_DrawIconEx(hdcDst, FALSE, 0x80A0B0C0, 32, DI_NORMAL, 0x00000000, 0x00605850, 0x00C0B0A0, __LINE__);
+ check_DrawIconEx(hdcDst, TRUE, 0x80A0B0C0, 32, DI_NORMAL, 0x00000000, 0x00605850, 0x00C0B0A0, __LINE__);
+ check_DrawIconEx(hdcDst, FALSE, 0x80A0B0C0, 32, DI_NORMAL, 0x00FFFFFF, 0x00DFD7CF, 0x00C0B0A0, __LINE__);
+ check_DrawIconEx(hdcDst, TRUE, 0x80A0B0C0, 32, DI_NORMAL, 0x00FFFFFF, 0x00DFD7CF, 0x003F4F5F, __LINE__);
- check_DrawIconEx(hdcDst, FALSE, 0x01FFFFFF, 32, DI_NORMAL, 0x00000000, 0x00010101, 0x00FFFFFF, __LINE__);
- check_DrawIconEx(hdcDst, TRUE, 0x01FFFFFF, 32, DI_NORMAL, 0x00000000, 0x00010101, 0x00FFFFFF, __LINE__);
- }
+ check_DrawIconEx(hdcDst, FALSE, 0x01FFFFFF, 32, DI_NORMAL, 0x00000000, 0x00010101, 0x00FFFFFF, __LINE__);
+ check_DrawIconEx(hdcDst, TRUE, 0x01FFFFFF, 32, DI_NORMAL, 0x00000000, 0x00010101, 0x00FFFFFF, __LINE__);
/* Test detecting of alpha channel */
/* If a single pixel's alpha channel is non-zero, the icon
will be alpha blended, otherwise it will be draw with
and + xor blts. */
check_alpha_draw(hdcDst, TRUE, FALSE, 32, __LINE__);
- todo_wine check_alpha_draw(hdcDst, TRUE, TRUE, 32, __LINE__);
+ check_alpha_draw(hdcDst, TRUE, TRUE, 32, __LINE__);
SelectObject(hdcDst, bmpOld);
DeleteObject(bmpDst);
--
1.6.0.4
--=-FjwtPMFc52X68FRxpeQV--
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