gecko/gfx/thebes/gfxDWriteCommon.cpp

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
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 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Foundation code.
 *
 * The Initial Developer of the Original Code is Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Bas Schouten <bschouten@mozilla.com>
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#include "gfxDWriteCommon.h"

IDWriteFontFileLoader* gfxDWriteFontFileLoader::mInstance = NULL;

HRESULT STDMETHODCALLTYPE
gfxDWriteFontFileLoader::CreateStreamFromKey(const void *fontFileReferenceKey, 
                                             UINT32 fontFileReferenceKeySize, 
                                             IDWriteFontFileStream **fontFileStream)
{
    if (!fontFileReferenceKey || !fontFileStream) {
        return E_POINTER;
    }

    *fontFileStream = 
        new gfxDWriteFontFileStream(
        static_cast<const ffReferenceKey*>(fontFileReferenceKey)->mArray);

    if (!*fontFileStream) {
        return E_OUTOFMEMORY;
    }
    (*fontFileStream)->AddRef();
    return S_OK;
}

gfxDWriteFontFileStream::gfxDWriteFontFileStream(FallibleTArray<PRUint8> *aData)
{
    mData.SwapElements(*aData);
}

gfxDWriteFontFileStream::~gfxDWriteFontFileStream()
{
}

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 = NULL;
    return S_OK;
}

void STDMETHODCALLTYPE
gfxDWriteFontFileStream::ReleaseFileFragment(void *fragmentContext)
{
}