Joel Holdsworth : user32: Fixed CURSORICON_CreateIconFromBMI to preserve the alpha channel.
Module: wine Branch: master Commit: c2202929ab4b6d1ce379865dfd8904186814f265 URL: http://source.winehq.org/git/wine.git/?a=commit;h=c2202929ab4b6d1ce379865dfd... Author: Joel Holdsworth <joel(a)airwebreathe.org.uk> Date: Mon Jun 29 19:10:36 2009 +0100 user32: Fixed CURSORICON_CreateIconFromBMI to preserve the alpha channel. --- dlls/user32/cursoricon.c | 147 +++++++++++++++++++++++++++------------------- 1 files changed, 87 insertions(+), 60 deletions(-) diff --git a/dlls/user32/cursoricon.c b/dlls/user32/cursoricon.c index 23de6a5..a74b79d 100644 --- a/dlls/user32/cursoricon.c +++ b/dlls/user32/cursoricon.c @@ -659,6 +659,39 @@ static CURSORICONFILEDIRENTRY *CURSORICON_FindBestIconFile( CURSORICONFILEDIR *d return &dir->idEntries[n]; } +/*********************************************************************** + * stretch_blt_icon + * + * A helper function that stretches a bitmap buffer into an HBITMAP. + * + * PARAMS + * hDest [I] The handle of the destination bitmap. + * pDestInfo [I] The BITMAPINFO of the destination bitmap. + * pSrcInfo [I] The BITMAPINFO of the source bitmap. + * pSrcBits [I] A pointer to the source bitmap buffer. + **/ +static BOOL stretch_blt_icon(HBITMAP hDest, BITMAPINFO *pDestInfo, BITMAPINFO *pSrcInfo, char *pSrcBits) +{ + HBITMAP hOld; + BOOL res = FALSE; + static HDC hdcMem = NULL; + + if (!hdcMem) + hdcMem = CreateCompatibleDC(screen_dc); + + if (hdcMem) + { + hOld = SelectObject(hdcMem, hDest); + res = StretchDIBits(hdcMem, + 0, 0, pDestInfo->bmiHeader.biWidth, pDestInfo->bmiHeader.biHeight, + 0, 0, pSrcInfo->bmiHeader.biWidth, pSrcInfo->bmiHeader.biHeight, + pSrcBits, pSrcInfo, DIB_RGB_COLORS, SRCCOPY); + SelectObject(hdcMem, hOld); + } + + return res; +} + static HICON CURSORICON_CreateIconFromBMI( BITMAPINFO *bmi, POINT16 hotspot, BOOL bIcon, DWORD dwVersion, @@ -666,12 +699,11 @@ static HICON CURSORICON_CreateIconFromBMI( BITMAPINFO *bmi, UINT cFlag ) { HGLOBAL16 hObj; - static HDC hdcMem; int sizeAnd, sizeXor; HBITMAP hAndBits = 0, hXorBits = 0; /* error condition for later */ BITMAP bmpXor, bmpAnd; - BOOL DoStretch; INT size; + BITMAPINFO *pSrcInfo, *pDestInfo; if (dwVersion == 0x00020000) { @@ -693,11 +725,10 @@ static HICON CURSORICON_CreateIconFromBMI( BITMAPINFO *bmi, if (!width) width = bmi->bmiHeader.biWidth; if (!height) height = bmi->bmiHeader.biHeight/2; - DoStretch = (bmi->bmiHeader.biHeight/2 != height) || - (bmi->bmiHeader.biWidth != width); /* Scale the hotspot */ - if (DoStretch && hotspot.x != ICON_HOTSPOT && hotspot.y != ICON_HOTSPOT) + if (((bmi->bmiHeader.biHeight/2 != height) || (bmi->bmiHeader.biWidth != width)) && + hotspot.x != ICON_HOTSPOT && hotspot.y != ICON_HOTSPOT) { hotspot.x = (hotspot.x * width) / bmi->bmiHeader.biWidth; hotspot.y = (hotspot.y * height) / (bmi->bmiHeader.biHeight / 2); @@ -706,8 +737,6 @@ static HICON CURSORICON_CreateIconFromBMI( BITMAPINFO *bmi, if (!screen_dc) screen_dc = CreateDCW( DISPLAYW, NULL, NULL, NULL ); if (screen_dc) { - BITMAPINFO* pInfo; - /* Make sure we have room for the monochrome bitmap later on. * Note that BITMAPINFOINFO and BITMAPCOREHEADER are the same * up to and including the biBitCount. In-memory icon resource @@ -719,40 +748,47 @@ static HICON CURSORICON_CreateIconFromBMI( BITMAPINFO *bmi, * BYTE icAND[] // DIB bits for AND mask */ - if ((pInfo = HeapAlloc( GetProcessHeap(), 0, - max(size, sizeof(BITMAPINFOHEADER) + 2*sizeof(RGBQUAD))))) + pSrcInfo = HeapAlloc( GetProcessHeap(), 0, + max(size, sizeof(BITMAPINFOHEADER) + 2*sizeof(RGBQUAD))); + pDestInfo = HeapAlloc( GetProcessHeap(), 0, + max(size, sizeof(BITMAPINFOHEADER) + 2*sizeof(RGBQUAD))); + if (pSrcInfo && pDestInfo) { - memcpy( pInfo, bmi, size ); - pInfo->bmiHeader.biHeight /= 2; + memcpy( pSrcInfo, bmi, size ); + pSrcInfo->bmiHeader.biHeight /= 2; + + memcpy( pDestInfo, bmi, size ); + pDestInfo->bmiHeader.biWidth = width; + pDestInfo->bmiHeader.biHeight = height; + pDestInfo->bmiHeader.biSizeImage = 0; /* Create the XOR bitmap */ + if(pSrcInfo->bmiHeader.biBitCount == 32) + { + void *pDIBBuffer = NULL; + hXorBits = CreateDIBSection(screen_dc, pDestInfo, DIB_RGB_COLORS, &pDIBBuffer, NULL, 0); - if (DoStretch) { + if(hXorBits) + { + if (!stretch_blt_icon(hXorBits, pDestInfo, pSrcInfo, (char*)bmi + size)) + { + DeleteObject(hXorBits); + hXorBits = 0; + } + } + } + else + { hXorBits = CreateCompatibleBitmap(screen_dc, width, height); + if(hXorBits) { - HBITMAP hOld; - BOOL res = FALSE; - - if (!hdcMem) hdcMem = CreateCompatibleDC(screen_dc); - if (hdcMem) { - hOld = SelectObject(hdcMem, hXorBits); - res = StretchDIBits(hdcMem, 0, 0, width, height, 0, 0, - bmi->bmiHeader.biWidth, bmi->bmiHeader.biHeight/2, - (char*)bmi + size, pInfo, DIB_RGB_COLORS, SRCCOPY); - SelectObject(hdcMem, hOld); + if(!stretch_blt_icon(hXorBits, pDestInfo, pSrcInfo, (char*)bmi + size)) + { + DeleteObject(hXorBits); + hXorBits = 0; + } } - if (!res) { DeleteObject(hXorBits); hXorBits = 0; } - } - } else { - if (is_dib_monochrome(bmi)) { - hXorBits = CreateBitmap(width, height, 1, 1, NULL); - SetDIBits(screen_dc, hXorBits, 0, height, - (char*)bmi + size, pInfo, DIB_RGB_COLORS); - } - else - hXorBits = CreateDIBitmap(screen_dc, &pInfo->bmiHeader, - CBM_INIT, (char*)bmi + size, pInfo, DIB_RGB_COLORS); } if( hXorBits ) @@ -761,51 +797,42 @@ static HICON CURSORICON_CreateIconFromBMI( BITMAPINFO *bmi, get_dib_width_bytes( bmi->bmiHeader.biWidth, bmi->bmiHeader.biBitCount ) * abs( bmi->bmiHeader.biHeight ) / 2; - pInfo->bmiHeader.biBitCount = 1; - if (pInfo->bmiHeader.biSize != sizeof(BITMAPCOREHEADER)) + pSrcInfo->bmiHeader.biBitCount = 1; + if (pSrcInfo->bmiHeader.biSize != sizeof(BITMAPCOREHEADER)) { - RGBQUAD *rgb = pInfo->bmiColors; + RGBQUAD *rgb = pSrcInfo->bmiColors; - pInfo->bmiHeader.biClrUsed = pInfo->bmiHeader.biClrImportant = 2; + pSrcInfo->bmiHeader.biClrUsed = pSrcInfo->bmiHeader.biClrImportant = 2; rgb[0].rgbBlue = rgb[0].rgbGreen = rgb[0].rgbRed = 0x00; rgb[1].rgbBlue = rgb[1].rgbGreen = rgb[1].rgbRed = 0xff; rgb[0].rgbReserved = rgb[1].rgbReserved = 0; } else { - RGBTRIPLE *rgb = (RGBTRIPLE *)(((BITMAPCOREHEADER *)pInfo) + 1); + RGBTRIPLE *rgb = (RGBTRIPLE *)(((BITMAPCOREHEADER *)pSrcInfo) + 1); rgb[0].rgbtBlue = rgb[0].rgbtGreen = rgb[0].rgbtRed = 0x00; rgb[1].rgbtBlue = rgb[1].rgbtGreen = rgb[1].rgbtRed = 0xff; } /* Create the AND bitmap */ + hAndBits = CreateBitmap(width, height, 1, 1, NULL); - if (DoStretch) { - if ((hAndBits = CreateBitmap(width, height, 1, 1, NULL))) { - HBITMAP hOld; - BOOL res = FALSE; - - if (!hdcMem) hdcMem = CreateCompatibleDC(screen_dc); - if (hdcMem) { - hOld = SelectObject(hdcMem, hAndBits); - res = StretchDIBits(hdcMem, 0, 0, width, height, 0, 0, - pInfo->bmiHeader.biWidth, pInfo->bmiHeader.biHeight, - xbits, pInfo, DIB_RGB_COLORS, SRCCOPY); - SelectObject(hdcMem, hOld); + if(!stretch_blt_icon(hAndBits, pDestInfo, pSrcInfo, xbits)) + { + DeleteObject(hAndBits); + hAndBits = 0; } - if (!res) { DeleteObject(hAndBits); hAndBits = 0; } - } - } else { - hAndBits = CreateBitmap(width, height, 1, 1, NULL); - - if (hAndBits) SetDIBits(screen_dc, hAndBits, 0, height, - xbits, pInfo, DIB_RGB_COLORS); + if( !hAndBits ) + { + DeleteObject( hXorBits ); + hXorBits = 0; + } } - if( !hAndBits ) DeleteObject( hXorBits ); - } - HeapFree( GetProcessHeap(), 0, pInfo ); + + HeapFree( GetProcessHeap(), 0, pSrcInfo ); + HeapFree( GetProcessHeap(), 0, pDestInfo ); } }
participants (1)
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Alexandre Julliard