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Apply Upstream Commit: windowscodecs: BitmapScaler_CopyPixels: Do not demand a larger buffer than necessary. #156

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Apply Upstream Commit: windowscodecs: BitmapScaler_CopyPixels: Do not demand a larger buffer than necessary. #156

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2 changes: 1 addition & 1 deletion dlls/windowscodecs/scaler.c
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Original file line number Diff line number Diff line change
Expand Up @@ -251,7 +251,7 @@ static HRESULT WINAPI BitmapScaler_CopyPixels(IWICBitmapScaler *iface,
goto end;
}

if ((cbStride * dest_rect.Height) > cbBufferSize)
if (cbStride * (dest_rect.Height - 1) + bytesperrow > cbBufferSize)
{
hr = E_INVALIDARG;
goto end;
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13 changes: 8 additions & 5 deletions dlls/windowscodecs/tests/bitmap.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1151,7 +1151,7 @@ static void test_bitmap_scaler(void)
double res_x, res_y;
IWICBitmap *bitmap;
UINT width, height;
BYTE buf[16];
BYTE buf[93];
HRESULT hr;

hr = IWICImagingFactory_CreateBitmap(factory, 4, 2, &GUID_WICPixelFormat24bppBGR, WICBitmapCacheOnLoad, &bitmap);
Expand Down Expand Up @@ -1243,28 +1243,28 @@ static void test_bitmap_scaler(void)
WICBitmapInterpolationModeNearestNeighbor);
ok(hr == E_INVALIDARG, "Failed to initialize bitmap scaler, hr %#x.\n", hr);

hr = IWICBitmapScaler_Initialize(scaler, (IWICBitmapSource *)bitmap, 8, 4,
hr = IWICBitmapScaler_Initialize(scaler, (IWICBitmapSource *)bitmap, 7, 4,
WICBitmapInterpolationModeNearestNeighbor);
ok(hr == S_OK, "Failed to initialize bitmap scaler, hr %#x.\n", hr);

hr = IWICBitmapScaler_Initialize(scaler, (IWICBitmapSource *)bitmap, 0, 4,
WICBitmapInterpolationModeNearestNeighbor);
ok(hr == E_INVALIDARG, "Unexpected hr %#x.\n", hr);

hr = IWICBitmapScaler_Initialize(scaler, (IWICBitmapSource *)bitmap, 8, 0,
hr = IWICBitmapScaler_Initialize(scaler, (IWICBitmapSource *)bitmap, 7, 0,
WICBitmapInterpolationModeNearestNeighbor);
ok(hr == E_INVALIDARG, "Unexpected hr %#x.\n", hr);

hr = IWICBitmapScaler_Initialize(scaler, NULL, 8, 4, WICBitmapInterpolationModeNearestNeighbor);
ok(hr == E_INVALIDARG, "Unexpected hr %#x.\n", hr);

hr = IWICBitmapScaler_Initialize(scaler, (IWICBitmapSource *)bitmap, 8, 4,
hr = IWICBitmapScaler_Initialize(scaler, (IWICBitmapSource *)bitmap, 7, 4,
WICBitmapInterpolationModeNearestNeighbor);
ok(hr == WINCODEC_ERR_WRONGSTATE, "Unexpected hr %#x.\n", hr);

hr = IWICBitmapScaler_GetSize(scaler, &width, &height);
ok(hr == S_OK, "Failed to get scaler size, hr %#x.\n", hr);
ok(width == 8, "Unexpected width %u.\n", width);
ok(width == 7, "Unexpected width %u.\n", width);
ok(height == 4, "Unexpected height %u.\n", height);

hr = IWICBitmapScaler_GetSize(scaler, NULL, &height);
Expand Down Expand Up @@ -1307,6 +1307,9 @@ static void test_bitmap_scaler(void)
ok(hr == WINCODEC_ERR_PALETTEUNAVAILABLE, "Unexpected hr %#x.\n", hr);
IWICPalette_Release(palette);

hr = IWICBitmapScaler_CopyPixels(scaler, NULL, /*cbStride=*/24, sizeof(buf), buf);
ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);

IWICBitmapScaler_Release(scaler);

IWICBitmap_Release(bitmap);
Expand Down