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diff -ur skia.org/tools/window/win/RasterWindowContext_win.cpp skia/tools/window/win/RasterWindowContext_win.cpp
--- skia.org/tools/window/win/RasterWindowContext_win.cpp 2024-10-04 15:36:01.287777189 +0200
+++ skia/tools/window/win/RasterWindowContext_win.cpp 2024-10-04 15:37:22.221265385 +0200
@@ -53,7 +53,7 @@
fWidth = w;
fHeight = h;
fBackbufferSurface.reset();
- const size_t bmpSize = sizeof(BITMAPINFOHEADER) + w * h * sizeof(uint32_t);
+ const size_t bmpSize = sizeof(BITMAPINFO);
fSurfaceMemory.reset(bmpSize);
BITMAPINFO* bmpInfo = reinterpret_cast<BITMAPINFO*>(fSurfaceMemory.get());
ZeroMemory(bmpInfo, sizeof(BITMAPINFO));
@@ -63,11 +63,12 @@
bmpInfo->bmiHeader.biPlanes = 1;
bmpInfo->bmiHeader.biBitCount = 32;
bmpInfo->bmiHeader.biCompression = BI_RGB;
- void* pixels = bmpInfo->bmiColors;
+ // Do not use a packed DIB bitmap, SkSurface_Raster::onNewImageSnapshot() does
+ // a deep copy if it does not own the pixels.
SkImageInfo info = SkImageInfo::Make(w, h, fDisplayParams.fColorType, kPremul_SkAlphaType,
fDisplayParams.fColorSpace);
- fBackbufferSurface = SkSurfaces::WrapPixels(info, pixels, sizeof(uint32_t) * w);
+ fBackbufferSurface = SkSurfaces::Raster(info);
}
sk_sp<SkSurface> RasterWindowContext_win::getBackbufferSurface() { return fBackbufferSurface; }
@@ -75,8 +76,10 @@
void RasterWindowContext_win::onSwapBuffers() {
BITMAPINFO* bmpInfo = reinterpret_cast<BITMAPINFO*>(fSurfaceMemory.get());
HDC dc = GetDC(fWnd);
- StretchDIBits(dc, 0, 0, fWidth, fHeight, 0, 0, fWidth, fHeight, bmpInfo->bmiColors, bmpInfo,
- DIB_RGB_COLORS, SRCCOPY);
+ SkPixmap pixmap;
+ fBackbufferSurface->peekPixels(&pixmap);
+ StretchDIBits(dc, 0, 0, fWidth, fHeight, 0, 0, fWidth, fHeight, pixmap.addr(), bmpInfo,
+ DIB_RGB_COLORS, SRCCOPY);
ReleaseDC(fWnd, dc);
}
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