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authorwolfbeast <mcwerewolf@gmail.com>2018-06-07 06:21:57 +0200
committerwolfbeast <mcwerewolf@gmail.com>2018-06-07 06:21:57 +0200
commitbd0e550e63c646dc5c515caf52aedad8bc29f9bd (patch)
tree2a5131e409e23f73ef5a8f79fd3d53484c3f7a7f /gfx
parente810c8a5c0b116d7214c786186f0478a7f70ff64 (diff)
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Account for offsets when creating buffers for image textures.
Diffstat (limited to 'gfx')
-rw-r--r--gfx/layers/ImageDataSerializer.cpp35
-rw-r--r--gfx/layers/ImageDataSerializer.h6
-rw-r--r--gfx/layers/composite/TextureHost.cpp6
3 files changed, 44 insertions, 3 deletions
diff --git a/gfx/layers/ImageDataSerializer.cpp b/gfx/layers/ImageDataSerializer.cpp
index 08ed83bd9..db11e903c 100644
--- a/gfx/layers/ImageDataSerializer.cpp
+++ b/gfx/layers/ImageDataSerializer.cpp
@@ -84,6 +84,41 @@ ComputeYCbCrBufferSize(const gfx::IntSize& aYSize, const gfx::IntSize& aCbCrSize
}
uint32_t
+ComputeYCbCrBufferSize(const gfx::IntSize& aYSize, const gfx::IntSize& aCbCrSize,
+ uint32_t aYOffset, uint32_t aCbOffset, uint32_t aCrOffset)
+{
+ MOZ_ASSERT(aYSize.height >= 0 && aYSize.width >= 0);
+
+ int32_t yStride = aYSize.width;
+ int32_t cbCrStride = aCbCrSize.width;
+ if (aYSize.height < 0 || aYSize.width < 0 || aCbCrSize.height < 0 || aCbCrSize.width < 0 ||
+ !gfx::Factory::AllowedSurfaceSize(IntSize(yStride, aYSize.height)) ||
+ !gfx::Factory::AllowedSurfaceSize(IntSize(cbCrStride, aCbCrSize.height))) {
+ return 0;
+ }
+
+ uint32_t yLength = GetAlignedStride<4>(yStride, aYSize.height);
+ uint32_t cbCrLength = GetAlignedStride<4>(cbCrStride, aCbCrSize.height);
+ if (yLength == 0 || cbCrLength == 0) {
+ return 0;
+ }
+
+ CheckedInt<uint32_t> yEnd = aYOffset;
+ yEnd += yLength;
+ CheckedInt<uint32_t> cbEnd = aCbOffset;
+ cbEnd += cbCrLength;
+ CheckedInt<uint32_t> crEnd = aCrOffset;
+ crEnd += cbCrLength;
+
+ if (!yEnd.isValid() || !cbEnd.isValid() || !crEnd.isValid() ||
+ yEnd.value() > aCbOffset || cbEnd.value() > aCrOffset) {
+ return 0;
+ }
+
+ return crEnd.value();
+}
+
+uint32_t
ComputeYCbCrBufferSize(uint32_t aBufferSize)
{
return GetAlignedStride<4>(aBufferSize, 1);
diff --git a/gfx/layers/ImageDataSerializer.h b/gfx/layers/ImageDataSerializer.h
index 53a589d21..4b3194b0c 100644
--- a/gfx/layers/ImageDataSerializer.h
+++ b/gfx/layers/ImageDataSerializer.h
@@ -47,7 +47,11 @@ uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize,
int32_t aCbCrStride);
uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize,
const gfx::IntSize& aCbCrSize);
-
+uint32_t ComputeYCbCrBufferSize(const gfx::IntSize& aYSize,
+ const gfx::IntSize& aCbCrSize,
+ uint32_t aYOffset,
+ uint32_t aCbOffset,
+ uint32_t aCrOffset);
uint32_t ComputeYCbCrBufferSize(uint32_t aBufferSize);
void ComputeYCbCrOffsets(int32_t yStride, int32_t yHeight,
diff --git a/gfx/layers/composite/TextureHost.cpp b/gfx/layers/composite/TextureHost.cpp
index c93037384..e4a2ffd86 100644
--- a/gfx/layers/composite/TextureHost.cpp
+++ b/gfx/layers/composite/TextureHost.cpp
@@ -259,7 +259,9 @@ CreateBackendIndependentTextureHost(const SurfaceDescriptor& aDesc,
case BufferDescriptor::TYCbCrDescriptor: {
const YCbCrDescriptor& ycbcr = desc.get_YCbCrDescriptor();
reqSize =
- ImageDataSerializer::ComputeYCbCrBufferSize(ycbcr.ySize(), ycbcr.cbCrSize());
+ ImageDataSerializer::ComputeYCbCrBufferSize(ycbcr.ySize(), ycbcr.cbCrSize(),
+ ycbcr.yOffset(), ycbcr.cbOffset(),
+ ycbcr.crOffset());
break;
}
case BufferDescriptor::TRGBDescriptor: {
@@ -272,7 +274,7 @@ CreateBackendIndependentTextureHost(const SurfaceDescriptor& aDesc,
MOZ_CRASH("GFX: Bad descriptor");
}
- if (bufSize < reqSize) {
+ if (reqSize == 0 || bufSize < reqSize) {
NS_ERROR("A client process gave a shmem too small to fit for its descriptor!");
return nullptr;
}