diff options
author | Jocelyn Turcotte <jocelyn.turcotte@digia.com> | 2013-11-13 17:14:13 +0100 |
---|---|---|
committer | The Qt Project <gerrit-noreply@qt-project.org> | 2013-11-15 13:49:20 +0100 |
commit | 5543e52d503f88bccf772160899ff01fe3df0583 (patch) | |
tree | c956824240f980e99bdfc52cf6848253e55d6836 /lib/backing_store_qt.cpp | |
parent | b83153f1f790614b4807a607990f87557a332bfc (diff) |
Use a QImage instead of QPixmap in BackingStoreQt.
This is mainly to get rid of the warning shown when using QQuickWebEngineView
without delegated rendering with the threaded scene graph render loop:
"QPainter: It is not safe to use drawPixmap() outside the GUI thread"
The main advantage that QPixmap gave us was that QPixmap::scroll is
provided. This patch pulls out some of its implementation to make the
use case work with QImage.
Since QPixmap is backed by a QImage with the raster paint engine, the
previous behavior should remain except on the DirectFB platform, which
we don't ship to yet.
Change-Id: If77c9079ee95218519be1d092cad24635e29a279
Reviewed-by: Zeno Albisser <zeno.albisser@digia.com>
Diffstat (limited to 'lib/backing_store_qt.cpp')
-rw-r--r-- | lib/backing_store_qt.cpp | 39 |
1 files changed, 21 insertions, 18 deletions
diff --git a/lib/backing_store_qt.cpp b/lib/backing_store_qt.cpp index 8324e5d46..b12f09f18 100644 --- a/lib/backing_store_qt.cpp +++ b/lib/backing_store_qt.cpp @@ -41,6 +41,8 @@ #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" @@ -52,10 +54,15 @@ #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) + , m_pixelBuffer(size.width() * m_deviceScaleFactor, size.height() * m_deviceScaleFactor, QImage::Format_ARGB32_Premultiplied) { } @@ -74,7 +81,7 @@ void BackingStoreQt::paintToTarget(QPainter* painter, const QRectF& rect) qreal h = rect.height() * m_deviceScaleFactor; QRectF source(x, y, w, h); - painter->drawPixmap(rect, m_pixelBuffer, source); + painter->drawImage(rect, m_pixelBuffer, source); } void BackingStoreQt::PaintToBackingStore(content::RenderProcessHost *process, @@ -125,13 +132,10 @@ void BackingStoreQt::ScrollBackingStore(const gfx::Vector2d &delta, const gfx::R gfx::Rect pixel_rect = gfx::ToEnclosingRect(gfx::ScaleRect(clip_rect, m_deviceScaleFactor)); gfx::Vector2d pixel_delta = gfx::ToFlooredVector2d(gfx::ScaleVector2d(delta, m_deviceScaleFactor)); - m_pixelBuffer.scroll(pixel_delta.x() - , pixel_delta.y() - , pixel_rect.x() - , pixel_rect.y() - , pixel_rect.width() - , pixel_rect.height()); - + // 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) @@ -150,20 +154,19 @@ bool BackingStoreQt::CopyFromBackingStore(const gfx::Rect &rect, skia::PlatformB SkAutoLockPixels alp(bitmap); - QPixmap cpy = m_pixelBuffer.copy(rect.x(), rect.y(), rect.width(), rect.height()); - QImage img = cpy.toImage(); + QImage cpy = m_pixelBuffer.copy(rect.x(), rect.y(), rect.width(), rect.height()); // Convert the format and remove transparency. - if (img.format() != QImage::Format_RGB32) - img = img.convertToFormat(QImage::Format_RGB32); + if (cpy.format() != QImage::Format_RGB32) + cpy = cpy.convertToFormat(QImage::Format_RGB32); - const uint8_t* src = img.bits(); + const uint8_t* src = cpy.bits(); uint8_t* dst = reinterpret_cast<uint8_t*>(bitmap.getAddr32(0,0)); - int bytesPerLine = img.bytesPerLine(); - int bytesPerPixel = bytesPerLine / img.width(); + int bytesPerLine = cpy.bytesPerLine(); + int bytesPerPixel = bytesPerLine / cpy.width(); int copyLineLength = width * bytesPerPixel; - int lineOffset = rect.y() * img.width(); + int lineOffset = rect.y() * cpy.width(); int rowOffset = rect.x() * bytesPerPixel; const uint8_t* copyLineBegin = src + rowOffset + lineOffset; @@ -171,7 +174,7 @@ bool BackingStoreQt::CopyFromBackingStore(const gfx::Rect &rect, skia::PlatformB for (int lineNumber = 0; lineNumber < height; ++lineNumber) { memcpy(dst, copyLineBegin, copyLineLength); dst += copyLineLength; - copyLineBegin += img.width(); + copyLineBegin += cpy.width(); } return true; |