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-rw-r--r--src/core/backing_store_qt.cpp187
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diff --git a/src/core/backing_store_qt.cpp b/src/core/backing_store_qt.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of the QtWebEngine module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and Digia. For licensing terms and
-** conditions see http://qt.digia.com/licensing. For further information
-** use the contact form at http://qt.digia.com/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 2.1 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 2.1 requirements
-** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Digia gives you certain additional
-** rights. These rights are described in the Digia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3.0 as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU General Public License version 3.0 requirements will be
-** met: http://www.gnu.org/copyleft/gpl.html.
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "backing_store_qt.h"
-
-#include "type_conversion.h"
-
-#include "content/public/browser/render_process_host.h"
-#include "ui/gfx/rect.h"
-#include "ui/gfx/rect_conversions.h"
-#include "ui/gfx/vector2d_conversions.h"
-#include "skia/ext/platform_canvas.h"
-
-#include <QPainter>
-#include <QScreen>
-#include <QSizeF>
-#include <QWindow>
-
-QT_BEGIN_NAMESPACE
-// from qbackingstore.cpp
-extern void qt_scrollRectInImage(QImage &img, const QRect &rect, const QPoint &offset);
-QT_END_NAMESPACE
-
-BackingStoreQt::BackingStoreQt(content::RenderWidgetHost *host, const gfx::Size &size, QWindow* parent)
- : content::BackingStore(host, size)
- , m_deviceScaleFactor((parent && parent->screen()) ? parent->screen()->devicePixelRatio() : 1)
- , m_pixelBuffer(size.width() * m_deviceScaleFactor, size.height() * m_deviceScaleFactor, QImage::Format_ARGB32_Premultiplied)
-{
-}
-
-BackingStoreQt::~BackingStoreQt()
-{
-}
-
-void BackingStoreQt::paintToTarget(QPainter* painter, const QRectF& rect)
-{
- if (m_pixelBuffer.isNull())
- return;
-
- qreal x = rect.x() * m_deviceScaleFactor;
- qreal y = rect.y() * m_deviceScaleFactor;
- qreal w = rect.width() * m_deviceScaleFactor;
- qreal h = rect.height() * m_deviceScaleFactor;
-
- QRectF source(x, y, w, h);
- painter->drawImage(rect, m_pixelBuffer, source);
-}
-
-void BackingStoreQt::PaintToBackingStore(content::RenderProcessHost *process,
- TransportDIB::Id bitmap,
- const gfx::Rect &bitmap_rect,
- const std::vector<gfx::Rect> &copy_rects,
- float scale_factor,
- const base::Closure &completion_callback,
- bool *scheduled_completion_callback)
-{
- if (bitmap_rect.IsEmpty())
- return;
-
- *scheduled_completion_callback = false;
- TransportDIB* dib = process->GetTransportDIB(bitmap);
- if (!dib)
- return;
-
- gfx::Rect pixel_bitmap_rect = gfx::ToEnclosingRect(gfx::ScaleRect(bitmap_rect, scale_factor));
-
- uint8_t* bitmapData = static_cast<uint8_t*>(dib->memory());
- const QImage img(bitmapData, pixel_bitmap_rect.width(), pixel_bitmap_rect.height(), QImage::Format_ARGB32);
-
- QPainter painter(&m_pixelBuffer);
- for (size_t i = 0; i < copy_rects.size(); ++i) {
- gfx::Rect copy_rect = gfx::ToEnclosingRect(gfx::ScaleRect(copy_rects[i], scale_factor));
-
- QRect source = QRect( copy_rect.x() - pixel_bitmap_rect.x()
- , copy_rect.y() - pixel_bitmap_rect.y()
- , copy_rect.width()
- , copy_rect.height());
-
- gfx::Rect copy_rect_dst = gfx::ToEnclosingRect(gfx::ScaleRect(copy_rects[i], m_deviceScaleFactor));
-
- QRect destination = QRect( copy_rect_dst.x()
- , copy_rect_dst.y()
- , copy_rect_dst.width()
- , copy_rect_dst.height());
-
-#if defined(OS_ANDROID)
- // The received image format is BGRA with Android so we have to swizzle the image data.
- painter.drawImage(destination, img.rgbSwapped(), source);
-#else
- painter.drawImage(destination, img, source);
-#endif
- }
-}
-
-void BackingStoreQt::ScrollBackingStore(const gfx::Vector2d &delta, const gfx::Rect &clip_rect, const gfx::Size &view_size)
-{
- DCHECK(delta.x() == 0 || delta.y() == 0);
-
- gfx::Rect pixel_rect = gfx::ToEnclosingRect(gfx::ScaleRect(clip_rect, m_deviceScaleFactor));
- gfx::Vector2d pixel_delta = gfx::ToFlooredVector2d(gfx::ScaleVector2d(delta, m_deviceScaleFactor));
-
- // Logic borrowed from QPixmap::scroll and QRasterPlatformPixmap::scroll.
- QRect dest = toQt(pixel_rect) & m_pixelBuffer.rect();
- QRect src = dest.translated(-pixel_delta.x(), -pixel_delta.y()) & dest;
- qt_scrollRectInImage(m_pixelBuffer, src, QPoint(pixel_delta.x(), pixel_delta.y()));
-}
-
-bool BackingStoreQt::CopyFromBackingStore(const gfx::Rect &rect, skia::PlatformBitmap *output)
-{
- const int width = std::min(m_pixelBuffer.width(), rect.width());
- const int height = std::min(m_pixelBuffer.height(), rect.height());
-
- if (!output->Allocate(width, height, true))
- return false;
-
- // This code assumes a visual mode where a pixel is
- // represented using a 32-bit unsigned int, with a byte per component.
- const SkBitmap& bitmap = output->GetBitmap();
- if (bitmap.rowBytes() != 4)
- return false;
-
- SkAutoLockPixels alp(bitmap);
-
- QImage cpy = m_pixelBuffer.copy(rect.x(), rect.y(), rect.width(), rect.height());
-
- // Convert the format and remove transparency.
- if (cpy.format() != QImage::Format_RGB32)
- cpy = cpy.convertToFormat(QImage::Format_RGB32);
-
- const uint8_t* src = cpy.bits();
- uint8_t* dst = reinterpret_cast<uint8_t*>(bitmap.getAddr32(0,0));
-
- int bytesPerLine = cpy.bytesPerLine();
- int bytesPerPixel = bytesPerLine / cpy.width();
- int copyLineLength = width * bytesPerPixel;
- int lineOffset = rect.y() * cpy.width();
- int rowOffset = rect.x() * bytesPerPixel;
-
- const uint8_t* copyLineBegin = src + rowOffset + lineOffset;
-
- for (int lineNumber = 0; lineNumber < height; ++lineNumber) {
- memcpy(dst, copyLineBegin, copyLineLength);
- dst += copyLineLength;
- copyLineBegin += cpy.width();
- }
-
- return true;
-}
-