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b=480088; use a single cached data block for painting with image surfaces on Windows CE; r=stuart

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This commit is contained in:
Vladimir Vukicevic 2009-03-08 22:08:41 -07:00
parent 5762c7528d
commit 09532c491d
1 changed files with 34 additions and 2 deletions
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36
widget/src/windows/nsWindow.cpp
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@ -169,6 +169,11 @@
// out to the bounding-box if there are more
#define MAX_RECTS_IN_REGION 100
#ifdef PAINT_USE_IMAGE_SURFACE
static nsAutoPtr<PRUint8> gSharedSurfaceData;
static gfxIntSize gSharedSurfaceSize;
#endif
/*
* WinCE helpers
*/
@ -6075,10 +6080,37 @@ PRBool nsWindow::OnPaint(HDC aDC)
targetSurface = new gfxWindowsSurface(hDC);
}
#elif defined(PAINT_USE_IMAGE_SURFACE)
if (!gSharedSurfaceData) {
gSharedSurfaceSize.height = GetSystemMetrics(SM_CYSCREEN);
gSharedSurfaceSize.width = GetSystemMetrics(SM_CXSCREEN);
gSharedSurfaceData = (PRUint8*) malloc(gSharedSurfaceSize.width * gSharedSurfaceSize.height * 4);
}
gfxIntSize surfaceSize(ps.rcPaint.right - ps.rcPaint.left,
ps.rcPaint.bottom - ps.rcPaint.top);
nsRefPtr<gfxImageSurface> targetSurface = new gfxImageSurface(surfaceSize,
gfxASurface::ImageFormatRGB24);
nsRefPtr<gfxImageSurface> targetSurface;
if (!gSharedSurfaceData ||
surfaceSize.width > gSharedSurfaceSize.width ||
surfaceSize.height > gSharedSurfaceSize.height)
{
#ifdef DEBUG_vladimir
RETAILMSG(1, (L"OnPaint: Paint area bigger than screen! Screen %dx%d, surface %dx%d, HWND %p\r\n", gSharedSurfaceSize.width, gSharedSurfaceSize.height, surfaceSize.width, surfaceSize.height, mWnd));
#endif
// allocate a new oversize surface; hopefully this will just be a one-time thing,
// and we should really fix whatever's doing it!
targetSurface = new gfxImageSurface(surfaceSize, gfxASurface::ImageFormatRGB24);
} else {
// don't use the shared surface directly; instead, create a new one
// that just reuses its buffer.
targetSurface = new gfxImageSurface(gSharedSurfaceData.get(),
surfaceSize,
surfaceSize.width * 4,
gfxASurface::ImageFormatRGB24);
}
if (targetSurface && !targetSurface->CairoStatus()) {
targetSurface->SetDeviceOffset(gfxPoint(-ps.rcPaint.left, -ps.rcPaint.top));
}