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author | Samuel Rødal <samuel.rodal@nokia.com> | 2011-09-08 11:10:47 (GMT) |
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committer | Samuel Rødal <samuel.rodal@nokia.com> | 2011-09-09 08:18:58 (GMT) |
commit | 786b85b13bc884a8b7eab59c43d6c393863fc470 (patch) | |
tree | 982e37e965d019ae4d3ddf2c6a4a546277189dc7 /src/gui | |
parent | ce47387a3e055c64326294198f93817d173265d2 (diff) | |
download | Qt-786b85b13bc884a8b7eab59c43d6c393863fc470.zip Qt-786b85b13bc884a8b7eab59c43d6c393863fc470.tar.gz Qt-786b85b13bc884a8b7eab59c43d6c393863fc470.tar.bz2 |
Allocate 16-byte aligned memory independent of platform for raster pool.
Fixes crash on MIPS (see original merge request
https://qt.gitorious.org/qt/qt/merge_requests/1366).
Reviewed-by: Olivier Goffart
Diffstat (limited to 'src/gui')
-rw-r--r-- | src/gui/painting/qpaintengine_raster.cpp | 54 |
1 files changed, 17 insertions, 37 deletions
diff --git a/src/gui/painting/qpaintengine_raster.cpp b/src/gui/painting/qpaintengine_raster.cpp index 36786c4..bcc5f9d 100644 --- a/src/gui/painting/qpaintengine_raster.cpp +++ b/src/gui/painting/qpaintengine_raster.cpp @@ -3764,6 +3764,11 @@ extern "C" { int q_gray_rendered_spans(QT_FT_Raster raster); } +static inline uchar *alignAddress(uchar *address, quintptr alignmentMask) +{ + return (uchar *)(((quintptr)address + alignmentMask) & ~alignmentMask); +} + void QRasterPaintEnginePrivate::rasterize(QT_FT_Outline *outline, ProcessSpans callback, void *userData, QRasterBuffer *) @@ -3791,19 +3796,10 @@ void QRasterPaintEnginePrivate::rasterize(QT_FT_Outline *outline, // minimize memory reallocations. However if initial size for // raster pool is changed for lower value, reallocations will // occur normally. - const int rasterPoolInitialSize = MINIMUM_POOL_SIZE; - int rasterPoolSize = rasterPoolInitialSize; - unsigned char *rasterPoolBase; -#if defined(Q_WS_WIN64) - rasterPoolBase = - // We make use of setjmp and longjmp in qgrayraster.c which requires - // 16-byte alignment, hence we hardcode this requirement here.. - (unsigned char *) _aligned_malloc(rasterPoolSize, sizeof(void*) * 2); -#else - unsigned char rasterPoolOnStack[rasterPoolInitialSize]; - rasterPoolBase = rasterPoolOnStack; -#endif - Q_CHECK_PTR(rasterPoolBase); + int rasterPoolSize = MINIMUM_POOL_SIZE; + uchar rasterPoolOnStack[MINIMUM_POOL_SIZE + 0xf]; + uchar *rasterPoolBase = alignAddress(rasterPoolOnStack, 0xf); + uchar *rasterPoolOnHeap = 0; qt_ft_grays_raster.raster_reset(*grayRaster.data(), rasterPoolBase, rasterPoolSize); @@ -3839,31 +3835,20 @@ void QRasterPaintEnginePrivate::rasterize(QT_FT_Outline *outline, // Out of memory, reallocate some more and try again... if (error == -6) { // ErrRaster_OutOfMemory from qgrayraster.c - int new_size = rasterPoolSize * 2; - if (new_size > 1024 * 1024) { + rasterPoolSize *= 2; + if (rasterPoolSize > 1024 * 1024) { qWarning("QPainter: Rasterization of primitive failed"); break; } rendered_spans += q_gray_rendered_spans(*grayRaster.data()); -#if defined(Q_WS_WIN64) - _aligned_free(rasterPoolBase); -#else - if (rasterPoolBase != rasterPoolOnStack) // initially on the stack - free(rasterPoolBase); -#endif + free(rasterPoolOnHeap); + rasterPoolOnHeap = (uchar *)malloc(rasterPoolSize + 0xf); - rasterPoolSize = new_size; - rasterPoolBase = -#if defined(Q_WS_WIN64) - // We make use of setjmp and longjmp in qgrayraster.c which requires - // 16-byte alignment, hence we hardcode this requirement here.. - (unsigned char *) _aligned_malloc(rasterPoolSize, sizeof(void*) * 2); -#else - (unsigned char *) malloc(rasterPoolSize); -#endif - Q_CHECK_PTR(rasterPoolBase); // note: we just freed the old rasterPoolBase. I hope it's not fatal. + Q_CHECK_PTR(rasterPoolOnHeap); // note: we just freed the old rasterPoolBase. I hope it's not fatal. + + rasterPoolBase = alignAddress(rasterPoolOnHeap, 0xf); qt_ft_grays_raster.raster_done(*grayRaster.data()); qt_ft_grays_raster.raster_new(grayRaster.data()); @@ -3873,12 +3858,7 @@ void QRasterPaintEnginePrivate::rasterize(QT_FT_Outline *outline, } } -#if defined(Q_WS_WIN64) - _aligned_free(rasterPoolBase); -#else - if (rasterPoolBase != rasterPoolOnStack) // initially on the stack - free(rasterPoolBase); -#endif + free(rasterPoolOnHeap); } void QRasterPaintEnginePrivate::recalculateFastImages() |