Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/mac/LocalCurrentGraphicsContext.mm

-/*
- * Copyright (C) 2006 Apple Computer, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- */
-
-#include "config.h"
-#include "core/platform/mac/LocalCurrentGraphicsContext.h"
-
-#include <AppKit/NSGraphicsContext.h>
-#include "core/platform/graphics/GraphicsContext.h"
-#include "platform_canvas.h"
-
-namespace WebCore {
-
-LocalCurrentGraphicsContext::LocalCurrentGraphicsContext(GraphicsContext* graphicsContext)
-    : m_didSetGraphicsContext(false)
-    , m_skiaBitLocker(graphicsContext->canvas())
-{
-    m_savedGraphicsContext = graphicsContext;
-    graphicsContext->save();
-
-    CGContextRef cgContext = this->cgContext();
-    if (cgContext == [[NSGraphicsContext currentContext] graphicsPort]) {
-        m_savedNSGraphicsContext = 0;
-        return;
-    }
-
-    m_savedNSGraphicsContext = [[NSGraphicsContext currentContext] retain];
-    NSGraphicsContext* newContext = [NSGraphicsContext graphicsContextWithGraphicsPort:cgContext flipped:YES];
-    [NSGraphicsContext setCurrentContext:newContext];
-    m_didSetGraphicsContext = true;
-}
-
-LocalCurrentGraphicsContext::~LocalCurrentGraphicsContext()
-{
-    if (m_didSetGraphicsContext) {
-        [NSGraphicsContext setCurrentContext:m_savedNSGraphicsContext];
-        [m_savedNSGraphicsContext release];
-    }
-
-    m_savedGraphicsContext->restore();
-}
-
-CGContextRef LocalCurrentGraphicsContext::cgContext()
-{
-    // This synchronizes the CGContext to reflect the current SkCanvas state.
-    // The implementation may not return the same CGContext each time.
-    CGContextRef cgContext = m_skiaBitLocker.cgContext();
-
-    return cgContext;
-}
-
-ContextContainer::ContextContainer(GraphicsContext* graphicsContext) 
-    : m_skiaBitLocker(graphicsContext->canvas())
-{
-}
-
-}