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user32: Added DrawIconEx alpha blending support.

This commit is contained in:
Joel Holdsworth 2009-05-31 16:52:48 +01:00 committed by Alexandre Julliard
parent a0232508b3
commit d1c89d0a78
2 changed files with 88 additions and 46 deletions
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108
dlls/user32/cursoricon.c
View File

@ -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 (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 );
result = TRUE;
}
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(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
{
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 );
}
}
result = TRUE;
SetTextColor( hdc, oldFg );
SetBkColor( hdc, oldBg );
if (hXorBits) DeleteObject( hXorBits );
if (hAndBits) DeleteObject( hAndBits );
SetStretchBltMode (hdc, nStretchMode);
if (DoOffscreen) {

26
dlls/user32/tests/cursoricon.c
View File

@ -1167,11 +1167,8 @@ 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__);
@ -1189,25 +1186,22 @@ 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__);
cleanup:
if(bmpOld)