Transparency

third_party/WebKit/WebCore/platform/graphics/chromium/ThemeHelperChromiumWin.cpp

Index: third_party/WebKit/WebCore/platform/graphics/chromium/ThemeHelperChromiumWin.cpp
===================================================================
--- third_party/WebKit/WebCore/platform/graphics/chromium/ThemeHelperChromiumWin.cpp	(revision 10194)
+++ third_party/WebKit/WebCore/platform/graphics/chromium/ThemeHelperChromiumWin.cpp	(working copy)
@@ -1,104 +0,0 @@
-/*
- * Copyright (c) 2008, 2009, Google Inc. All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "ThemeHelperChromiumWin.h"
-
-#include "FloatRect.h"
-#include "GraphicsContext.h"
-
-namespace WebCore {
-
-ThemeHelperWin::ThemeHelperWin(GraphicsContext* context, const IntRect& rect)
-    : m_orgContext(context)
-    , m_orgMatrix(context->getCTM())
-    , m_orgRect(rect)
-{
-    if (m_orgMatrix.b() != 0 || m_orgMatrix.c() != 0) {  // Check for skew.
-        // Complicated effects, make a copy and draw the bitmap there.
-        m_type = COPY;
-        m_rect.setSize(rect.size());
-
-        m_newBuffer.set(ImageBuffer::create(rect.size(), false).release());
-
-        // Theme drawing messes with the transparency.
-        // FIXME: Ideally, we would leave this transparent, but I was
-        // having problems with button drawing, so we fill with white. Buttons
-        // looked good with transparent here and no fixing up of the alpha
-        // later, but text areas didn't. This makes text areas look good but
-        // gives buttons a white halo. Is there a way to fix this? I think
-        // buttons actually have antialised edges which is just not possible
-        // to handle on a transparent background given that it messes with the
-        // alpha channel.
-        FloatRect newContextRect(0, 0, rect.width(), rect.height());
-        GraphicsContext* newContext = m_newBuffer->context();
-        newContext->setFillColor(Color::white);
-        newContext->fillRect(newContextRect);
-
-        return;
-    }
-
-    if (m_orgMatrix.a() != 1.0 || m_orgMatrix.d() != 1.0) {  // Check for scale.
-        // Only a scaling is applied.
-        m_type = SCALE;
-
-        // Save the transformed coordinates to draw.
-        m_rect = m_orgMatrix.mapRect(rect);
-        
-        m_orgContext->save();
-        m_orgContext->concatCTM(m_orgContext->getCTM().inverse());
-        return;
-    }
-
-    // Nothing interesting.
-    m_rect = rect;
-    m_type = ORIGINAL;
-}
-
-ThemeHelperWin::~ThemeHelperWin()
-{
-    switch (m_type) {
-    case SCALE:
-        m_orgContext->restore();
-        break;
-    case COPY: {
-        // Copy the duplicate bitmap with our control to the original canvas.
-        FloatRect destRect(m_orgRect);
-        m_newBuffer->context()->platformContext()->canvas()->
-            getTopPlatformDevice().fixupAlphaBeforeCompositing();
-        m_orgContext->drawImage(m_newBuffer->image(), destRect);
-        break;
-    }
-    case ORIGINAL:
-        break;
-    }
-}
-
-}  // namespace WebCore