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-rw-r--r--gfx/thebes/gfxDWriteCommon.cpp204
1 files changed, 204 insertions, 0 deletions
diff --git a/gfx/thebes/gfxDWriteCommon.cpp b/gfx/thebes/gfxDWriteCommon.cpp
new file mode 100644
index 0000000000..ee81f15680
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+++ b/gfx/thebes/gfxDWriteCommon.cpp
@@ -0,0 +1,204 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "gfxDWriteCommon.h"
+
+#include <unordered_map>
+
+#include "mozilla/Atomics.h"
+#include "mozilla/StaticMutex.h"
+#include "mozilla/gfx/Logging.h"
+
+class gfxDWriteFontFileStream;
+
+static mozilla::StaticMutex sFontFileStreamsMutex MOZ_UNANNOTATED;
+static uint64_t sNextFontFileKey = 0;
+static std::unordered_map<uint64_t, gfxDWriteFontFileStream*> sFontFileStreams;
+
+IDWriteFontFileLoader* gfxDWriteFontFileLoader::mInstance = nullptr;
+
+class gfxDWriteFontFileStream final : public IDWriteFontFileStream {
+ public:
+ /**
+ * Used by the FontFileLoader to create a new font stream,
+ * this font stream is created from data in memory. The memory
+ * passed may be released after object creation, it will be
+ * copied internally.
+ *
+ * @param aData Font data
+ */
+ gfxDWriteFontFileStream(const uint8_t* aData, uint32_t aLength,
+ uint64_t aFontFileKey);
+ ~gfxDWriteFontFileStream();
+
+ // IUnknown interface
+ IFACEMETHOD(QueryInterface)(IID const& iid, OUT void** ppObject) {
+ if (iid == __uuidof(IDWriteFontFileStream)) {
+ *ppObject = static_cast<IDWriteFontFileStream*>(this);
+ return S_OK;
+ } else if (iid == __uuidof(IUnknown)) {
+ *ppObject = static_cast<IUnknown*>(this);
+ return S_OK;
+ } else {
+ return E_NOINTERFACE;
+ }
+ }
+
+ IFACEMETHOD_(ULONG, AddRef)() {
+ MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt");
+ return ++mRefCnt;
+ }
+
+ IFACEMETHOD_(ULONG, Release)() {
+ MOZ_ASSERT(0 != mRefCnt, "dup release");
+ uint32_t count = --mRefCnt;
+ if (count == 0) {
+ // Avoid locking unless necessary. Verify the refcount hasn't changed
+ // while locked. Delete within the scope of the lock when zero.
+ mozilla::StaticMutexAutoLock lock(sFontFileStreamsMutex);
+ if (0 != mRefCnt) {
+ return mRefCnt;
+ }
+ delete this;
+ }
+ return count;
+ }
+
+ // IDWriteFontFileStream methods
+ virtual HRESULT STDMETHODCALLTYPE
+ ReadFileFragment(void const** fragmentStart, UINT64 fileOffset,
+ UINT64 fragmentSize, OUT void** fragmentContext);
+
+ virtual void STDMETHODCALLTYPE ReleaseFileFragment(void* fragmentContext);
+
+ virtual HRESULT STDMETHODCALLTYPE GetFileSize(OUT UINT64* fileSize);
+
+ virtual HRESULT STDMETHODCALLTYPE GetLastWriteTime(OUT UINT64* lastWriteTime);
+
+ size_t SizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf) const {
+ return mData.ShallowSizeOfExcludingThis(mallocSizeOf);
+ }
+
+ size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const {
+ return mallocSizeOf(this) + SizeOfExcludingThis(mallocSizeOf);
+ }
+
+ private:
+ FallibleTArray<uint8_t> mData;
+ mozilla::Atomic<uint32_t> mRefCnt;
+ uint64_t mFontFileKey;
+};
+
+gfxDWriteFontFileStream::gfxDWriteFontFileStream(const uint8_t* aData,
+ uint32_t aLength,
+ uint64_t aFontFileKey)
+ : mFontFileKey(aFontFileKey) {
+ // If this fails, mData will remain empty. That's OK: GetFileSize()
+ // will then return 0, etc., and the font just won't load.
+ if (!mData.AppendElements(aData, aLength, mozilla::fallible_t())) {
+ NS_WARNING("Failed to store data in gfxDWriteFontFileStream");
+ }
+}
+
+gfxDWriteFontFileStream::~gfxDWriteFontFileStream() {
+ sFontFileStreams.erase(mFontFileKey);
+}
+
+HRESULT STDMETHODCALLTYPE
+gfxDWriteFontFileStream::GetFileSize(UINT64* fileSize) {
+ *fileSize = mData.Length();
+ return S_OK;
+}
+
+HRESULT STDMETHODCALLTYPE
+gfxDWriteFontFileStream::GetLastWriteTime(UINT64* lastWriteTime) {
+ return E_NOTIMPL;
+}
+
+HRESULT STDMETHODCALLTYPE gfxDWriteFontFileStream::ReadFileFragment(
+ const void** fragmentStart, UINT64 fileOffset, UINT64 fragmentSize,
+ void** fragmentContext) {
+ // We are required to do bounds checking.
+ if (fileOffset + fragmentSize > (UINT64)mData.Length()) {
+ return E_FAIL;
+ }
+ // We should be alive for the duration of this.
+ *fragmentStart = &mData[fileOffset];
+ *fragmentContext = nullptr;
+ return S_OK;
+}
+
+void STDMETHODCALLTYPE
+gfxDWriteFontFileStream::ReleaseFileFragment(void* fragmentContext) {}
+
+HRESULT STDMETHODCALLTYPE gfxDWriteFontFileLoader::CreateStreamFromKey(
+ const void* fontFileReferenceKey, UINT32 fontFileReferenceKeySize,
+ IDWriteFontFileStream** fontFileStream) {
+ if (!fontFileReferenceKey || !fontFileStream) {
+ return E_POINTER;
+ }
+
+ mozilla::StaticMutexAutoLock lock(sFontFileStreamsMutex);
+ uint64_t fontFileKey = *static_cast<const uint64_t*>(fontFileReferenceKey);
+ auto found = sFontFileStreams.find(fontFileKey);
+ if (found == sFontFileStreams.end()) {
+ *fontFileStream = nullptr;
+ return E_FAIL;
+ }
+
+ found->second->AddRef();
+ *fontFileStream = found->second;
+ return S_OK;
+}
+
+/* static */
+HRESULT
+gfxDWriteFontFileLoader::CreateCustomFontFile(
+ const uint8_t* aFontData, uint32_t aLength, IDWriteFontFile** aFontFile,
+ IDWriteFontFileStream** aFontFileStream) {
+ MOZ_ASSERT(aFontFile);
+ MOZ_ASSERT(aFontFileStream);
+
+ RefPtr<IDWriteFactory> factory = mozilla::gfx::Factory::GetDWriteFactory();
+ if (!factory) {
+ gfxCriticalError()
+ << "Failed to get DWrite Factory in CreateCustomFontFile.";
+ return E_FAIL;
+ }
+
+ sFontFileStreamsMutex.Lock();
+ uint64_t fontFileKey = sNextFontFileKey++;
+ RefPtr<gfxDWriteFontFileStream> ffsRef =
+ new gfxDWriteFontFileStream(aFontData, aLength, fontFileKey);
+ sFontFileStreams[fontFileKey] = ffsRef;
+ sFontFileStreamsMutex.Unlock();
+
+ RefPtr<IDWriteFontFile> fontFile;
+ HRESULT hr = factory->CreateCustomFontFileReference(
+ &fontFileKey, sizeof(fontFileKey), Instance(), getter_AddRefs(fontFile));
+ if (FAILED(hr)) {
+ NS_WARNING("Failed to load font file from data!");
+ return hr;
+ }
+
+ fontFile.forget(aFontFile);
+ ffsRef.forget(aFontFileStream);
+
+ return S_OK;
+}
+
+size_t gfxDWriteFontFileLoader::SizeOfIncludingThis(
+ mozilla::MallocSizeOf mallocSizeOf) const {
+ size_t sizes = mallocSizeOf(this);
+
+ // We are a singleton type that is effective owner of sFontFileStreams.
+ MOZ_ASSERT(this == mInstance);
+ for (const auto& entry : sFontFileStreams) {
+ gfxDWriteFontFileStream* fileStream = entry.second;
+ sizes += fileStream->SizeOfIncludingThis(mallocSizeOf);
+ }
+
+ return sizes;
+}