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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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/gfx/Logging.h"
static mozilla::Atomic<uint64_t> sNextFontFileKey;
static std::unordered_map<uint64_t, IDWriteFontFileStream*> 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(FallibleTArray<uint8_t> *aData,
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)()
{
NS_PRECONDITION(int32_t(mRefCnt) >= 0, "illegal refcnt");
++mRefCnt;
return mRefCnt;
}
IFACEMETHOD_(ULONG, Release)()
{
NS_PRECONDITION(0 != mRefCnt, "dup release");
--mRefCnt;
if (mRefCnt == 0) {
delete this;
return 0;
}
return mRefCnt;
}
// 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);
private:
FallibleTArray<uint8_t> mData;
nsAutoRefCnt mRefCnt;
uint64_t mFontFileKey;
};
gfxDWriteFontFileStream::gfxDWriteFontFileStream(FallibleTArray<uint8_t> *aData,
uint64_t aFontFileKey)
: mFontFileKey(aFontFileKey)
{
mData.SwapElements(*aData);
}
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;
}
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(FallibleTArray<uint8_t>& aFontData,
IDWriteFontFile** aFontFile,
IDWriteFontFileStream** aFontFileStream)
{
MOZ_ASSERT(aFontFile);
MOZ_ASSERT(aFontFileStream);
IDWriteFactory *factory = gfxWindowsPlatform::GetPlatform()->GetDWriteFactory();
if (!factory) {
gfxCriticalError() << "Failed to get DWrite Factory in CreateCustomFontFile.";
return E_FAIL;
}
uint64_t fontFileKey = sNextFontFileKey++;
RefPtr<IDWriteFontFileStream> ffsRef = new gfxDWriteFontFileStream(&aFontData, fontFileKey);
sFontFileStreams[fontFileKey] = ffsRef;
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;
}
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