Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(3282)

Unified Diff: cc/caching_bitmap_canvas_layer_texture_updater.cc

Issue 11044003: Reduce texture uploads during scrollbar invalidations. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Remove virtual pixelsDidChange, fix nits. Created 8 years, 2 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
Index: cc/caching_bitmap_canvas_layer_texture_updater.cc
diff --git a/cc/caching_bitmap_canvas_layer_texture_updater.cc b/cc/caching_bitmap_canvas_layer_texture_updater.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7d2c85f1e6c3b04008f5df6f920edff04893c614
--- /dev/null
+++ b/cc/caching_bitmap_canvas_layer_texture_updater.cc
@@ -0,0 +1,59 @@
+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+
+#include "caching_bitmap_canvas_layer_texture_updater.h"
+
+#include "LayerPainterChromium.h"
+#include "skia/ext/platform_canvas.h"
+
+namespace cc {
+
+PassRefPtr<CachingBitmapCanvasLayerTextureUpdater>
+CachingBitmapCanvasLayerTextureUpdater::Create(
+ PassOwnPtr<LayerPainterChromium> painter) {
+ return adoptRef(new CachingBitmapCanvasLayerTextureUpdater(painter));
+}
+
+CachingBitmapCanvasLayerTextureUpdater::CachingBitmapCanvasLayerTextureUpdater(
+ PassOwnPtr<LayerPainterChromium> painter)
+ : BitmapCanvasLayerTextureUpdater(painter),
+ pixels_did_change_(false) {
+}
+
+void CachingBitmapCanvasLayerTextureUpdater::prepareToUpdate(
+ const IntRect& content_rect,
+ const IntSize& tile_size,
+ float contents_width_scale,
+ float contents_height_scale,
+ IntRect& resulting_opaque_rect,
+ CCRenderingStats& stats) {
+ BitmapCanvasLayerTextureUpdater::prepareToUpdate(content_rect,
+ tile_size,
+ contents_width_scale,
+ contents_height_scale,
+ resulting_opaque_rect,
+ stats);
+
+ const SkBitmap& new_bitmap = m_canvas->getDevice()->accessBitmap(false);
+ SkAutoLockPixels lock(new_bitmap);
+ ASSERT(new_bitmap.bytesPerPixel() > 0);
+ pixels_did_change_ = new_bitmap.config() != cached_bitmap_.config() ||
+ new_bitmap.height() != cached_bitmap_.height() ||
+ new_bitmap.width() != cached_bitmap_.width() ||
+ memcmp(new_bitmap.getPixels(),
+ cached_bitmap_.getPixels(),
+ new_bitmap.getSafeSize());
+
+ if (pixels_did_change_)
+ new_bitmap.deepCopyTo(&cached_bitmap_, new_bitmap.config());
+}
+
+bool CachingBitmapCanvasLayerTextureUpdater::pixelsDidChange() const
+{
+ return pixels_did_change_;
+}
+
+} // namespace cc

Powered by Google App Engine
This is Rietveld 408576698