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- Improve redraw and scrolling performance (issue #360).

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- Don't show magenta background when redrawing in release build (issue #300).


git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@299 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
This commit is contained in:
Marshall Greenblatt
2011-10-03 15:48:32 +00:00
parent 29386a3abc
commit 9fa941f1d7
6 changed files with 131 additions and 83 deletions
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18
libcef/webwidget_host_gtk.cc
View File

@@ -330,6 +330,8 @@ WebWidgetHost::WebWidgetHost()
: view_(NULL),
paint_delegate_(NULL),
webwidget_(NULL),
canvas_w_(0),
canvas_h_(0),
popup_(false),
scroll_dx_(0),
scroll_dy_(0),
@@ -357,11 +359,21 @@ void WebWidgetHost::Paint() {
int height = logical_size_.height();
gfx::Rect client_rect(width, height);
// Allocate a canvas if necessary
if (!canvas_.get()) {
// Number of pixels that the canvas is allowed to differ from the client area.
const int kCanvasGrowSize = 128;
if (!canvas_.get() ||
canvas_w_ < client_rect.width() ||
canvas_h_ < client_rect.height() ||
canvas_w_ > client_rect.width() + kCanvasGrowSize * 2 ||
canvas_h_ > client_rect.height() + kCanvasGrowSize * 2) {
ResetScrollRect();
paint_rect_ = client_rect;
canvas_.reset(new skia::PlatformCanvas(width, height, true));
// Resize the canvas to be within a reasonable size of the client area.
canvas_w_ = client_rect.width() + kCanvasGrowSize;
canvas_h_ = client_rect.height() + kCanvasGrowSize;
canvas_.reset(new skia::PlatformCanvas(canvas_w_, canvas_h_, true));
if (!canvas_.get()) {
// memory allocation failed, we can't paint.
LOG(ERROR) << "Failed to allocate memory for " << width << "x" << height;