зеркало из https://github.com/mozilla/pjs.git
Bug 386229 - "Setting cursor with GIF, PNG or XBM doesn't work" [p=alfredkayser@nl.ibm.com (Alfred Kayser) r=emaijala sr=tor a1.9=stuart]
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reed%reedloden.com
Родитель
0adb61f3bf
Коммит
42ed3047eb
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@ -2534,71 +2534,58 @@ NS_METHOD nsWindow::SetCursor(nsCursor aCursor)
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}
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static PRUint8* Data32BitTo1Bit(PRUint8* aImageData,
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PRUint32 aImageBytesPerRow,
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PRUint32 aWidth, PRUint32 aHeight)
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{
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// We need (aWidth + 7) / 8 bytes plus zero-padding up to a multiple of
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// 4 bytes for each row (HBITMAP requirement). Bug 353553.
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PRUint32 outBpr = ((aWidth + 31) / 8) & ~3;
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PRUint8* outData = new PRUint8[outBpr * aHeight];
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// Allocate and clear mask buffer
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PRUint8* outData = (PRUint8*)PR_Calloc(outBpr, aHeight);
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if (!outData)
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return NULL;
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PRUint8 *outRow = outData,
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*imageRow = aImageData;
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PRInt32 *imageRow = (PRInt32*)aImageData;
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for (PRUint32 curRow = 0; curRow < aHeight; curRow++) {
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PRUint8 *irow = imageRow;
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PRUint8 *nextOutRow = outRow + outBpr;
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PRUint8 alphaPixels = 0;
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PRUint8 offset = 7;
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PRUint8 *outRow = outData + curRow * outBpr;
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PRUint8 mask = 0x80;
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for (PRUint32 curCol = 0; curCol < aWidth; curCol++) {
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if (imageRow[3] > 0)
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alphaPixels |= (1 << offset);
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imageRow += 4;
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// Use sign bit to test for transparency, as alpha byte is highest byte
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if (*imageRow++ < 0)
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*outRow |= mask;
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if (offset == 0) {
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*outRow++ = alphaPixels;
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offset = 7;
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alphaPixels = 0;
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} else {
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offset--;
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mask >>= 1;
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if (!mask) {
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outRow ++;
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mask = 0x80;
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}
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}
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if (offset != 7)
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*outRow++ = alphaPixels;
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imageRow = irow + aImageBytesPerRow;
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while (outRow != nextOutRow)
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*outRow++ = 0; // padding
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}
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return outData;
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}
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// static
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HBITMAP nsWindow::DataToBitmap(PRUint8* aImageData,
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/**
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* Convert the given image data to a HBITMAP. If the requested depth is
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* 32 bit and the OS supports translucency, a bitmap with an alpha channel
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* will be returned.
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*
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* @param aImageData The image data to convert. Must use the format accepted
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* by CreateDIBitmap.
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* @param aWidth With of the bitmap, in pixels.
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* @param aHeight Height of the image, in pixels.
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* @param aDepth Image depth, in bits. Should be one of 1, 24 and 32.
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*
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* @return The HBITMAP representing the image. Caller should call
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* DeleteObject when done with the bitmap.
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* On failure, NULL will be returned.
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*/
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static HBITMAP DataToBitmap(PRUint8* aImageData,
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PRUint32 aWidth,
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PRUint32 aHeight,
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PRUint32 aDepth)
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{
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if (aDepth == 8 || aDepth == 4) {
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NS_WARNING("nsWindow::DataToBitmap can't handle 4 or 8 bit images");
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return NULL;
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}
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// dc must be a CreateCompatibleDC.
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// GetDC, cursors, 1 bit masks, and Win9x do not mix for some reason.
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HDC dc = ::CreateCompatibleDC(NULL);
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// force dc into color/bw mode
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int planes = ::GetDeviceCaps(dc, PLANES);
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int bpp = (aDepth == 1) ? 1 : ::GetDeviceCaps(dc, BITSPIXEL);
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HBITMAP tBitmap = ::CreateBitmap(1, 1, planes, bpp, NULL);
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HBITMAP oldbits = (HBITMAP)::SelectObject(dc, tBitmap);
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HDC dc = ::GetDC(NULL);
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#ifndef WINCE
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if (aDepth == 32 && IsCursorTranslucencySupported()) {
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@ -2627,15 +2614,13 @@ HBITMAP nsWindow::DataToBitmap(PRUint8* aImageData,
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aImageData,
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reinterpret_cast<CONST BITMAPINFO*>(&head),
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DIB_RGB_COLORS);
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::SelectObject(dc, oldbits);
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::DeleteObject(tBitmap);
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::DeleteDC(dc);
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::ReleaseDC(NULL, dc);
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return bmp;
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}
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#endif
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BITMAPINFOHEADER head = { 0 };
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char reserved_space[sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 2];
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BITMAPINFOHEADER& head = *(BITMAPINFOHEADER*)reserved_space;
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head.biSize = sizeof(BITMAPINFOHEADER);
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head.biWidth = aWidth;
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@ -2649,11 +2634,8 @@ HBITMAP nsWindow::DataToBitmap(PRUint8* aImageData,
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head.biClrUsed = 0;
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head.biClrImportant = 0;
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char reserved_space[sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 2];
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BITMAPINFO& bi = *(BITMAPINFO*)reserved_space;
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bi.bmiHeader = head;
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if (aDepth == 1) {
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RGBQUAD black = { 0, 0, 0, 0 };
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RGBQUAD white = { 255, 255, 255, 0 };
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@ -2663,10 +2645,7 @@ HBITMAP nsWindow::DataToBitmap(PRUint8* aImageData,
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}
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HBITMAP bmp = ::CreateDIBitmap(dc, &head, CBM_INIT, aImageData, &bi, DIB_RGB_COLORS);
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::SelectObject(dc, oldbits);
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::DeleteObject(tBitmap);
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::DeleteDC(dc);
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::ReleaseDC(NULL, dc);
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return bmp;
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}
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@ -2688,18 +2667,13 @@ NS_IMETHODIMP nsWindow::SetCursor(imgIContainer* aCursor,
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frame->GetWidth(&width);
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frame->GetHeight(&height);
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// Reject cursors greater than 128 pixels in some direction, to prevent
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// Reject cursors greater than 128 pixels in either direction, to prevent
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// spoofing.
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// XXX ideally we should rescale. Also, we could modify the API to
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// allow trusted content to set larger cursors.
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if (width > 128 || height > 128)
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return NS_ERROR_NOT_AVAILABLE;
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PRUint32 bpr;
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gfx_format format;
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frame->GetImageBytesPerRow(&bpr);
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frame->GetFormat(&format);
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frame->LockImageData();
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PRUint32 dataLen;
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@ -2710,44 +2684,15 @@ NS_IMETHODIMP nsWindow::SetCursor(imgIContainer* aCursor,
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return rv;
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}
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/* flip the image so that it is stored bottom-up */
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PRUint8 *bottomUpData = (PRUint8*)malloc(dataLen);
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if (!bottomUpData) {
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HBITMAP bmp = DataToBitmap(data, width, -height, 32);
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PRUint8* a1data = Data32BitTo1Bit(data, width, height);
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frame->UnlockImageData();
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return NS_ERROR_OUT_OF_MEMORY;
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}
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if (format == gfxIFormats::RGB_A8 || format == gfxIFormats::BGR_A8) {
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for (PRInt32 i = 0; i < height; ++i) {
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PRUint32 srcOffset = i * bpr;
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PRUint32 dstOffset = dataLen - (bpr * (i + 1));
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PRUint32 *srcRow = (PRUint32*)(data + srcOffset);
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PRUint32 *dstRow = (PRUint32*)(bottomUpData + dstOffset);
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memcpy(dstRow, srcRow, bpr);
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}
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} else {
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for (PRInt32 i = 0; i < height; ++i) {
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PRUint32 srcOffset = i * bpr;
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PRUint32 dstOffset = dataLen - (bpr * (i + 1));
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PRUint32 *srcRow = (PRUint32*)(data + srcOffset);
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PRUint32 *dstRow = (PRUint32*)(bottomUpData + dstOffset);
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for (PRInt32 x = 0; x < width; ++x) {
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dstRow[x] = (srcRow[x] & 0xFFFFFF) | (0xFF << 24);
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}
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}
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}
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frame->UnlockImageData();
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PRUint8* a1data = Data32BitTo1Bit(bottomUpData, bpr, width, height);
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if (!a1data) {
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free(bottomUpData);
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return NS_ERROR_FAILURE;
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}
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HBITMAP bmp = DataToBitmap(bottomUpData, width, height, 32);
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HBITMAP mbmp = DataToBitmap(a1data, width, height, 1);
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free(bottomUpData);
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delete[] a1data;
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HBITMAP mbmp = DataToBitmap(a1data, width, -height, 1);
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PR_Free(a1data);
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ICONINFO info = {0};
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info.fIcon = FALSE;
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@ -481,26 +481,6 @@ protected:
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static HCURSOR gHCursor;
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static imgIContainer* gCursorImgContainer;
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/**
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* Convert the given image data to a HBITMAP. If the requested depth is
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* 32 bit and the OS supports translucency, a bitmap with an alpha channel
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* will be returned.
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*
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* @param aImageData The image data to convert. Must use the format accepted
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* by CreateDIBitmap.
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* @param aWidth With of the bitmap, in pixels.
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* @param aHeight Height of the image, in pixels.
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* @param aDepth Image depth, in bits. Should be one of 1, 24 and 32.
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*
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* @return The HBITMAP representing the image. Caller should call
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* DeleteObject when done with the bitmap.
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* On failure, NULL will be returned.
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*/
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static HBITMAP DataToBitmap(PRUint8* aImageData,
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PRUint32 aWidth,
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PRUint32 aHeight,
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PRUint32 aDepth);
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#ifdef ACCESSIBILITY
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static BOOL gIsAccessibilityOn;
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static HINSTANCE gmAccLib;
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