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Bug 539356 - Part 6 - Add compositing paint flashing to BasicLayers. r=roc

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This commit is contained in:
Matt Woodrow 2012-06-11 16:44:08 +12:00
parent e15259b14a
commit 1593e158d4
3 changed files with 31 additions and 0 deletions
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25
gfx/layers/basic/BasicLayers.cpp
View File

@ -11,6 +11,7 @@
#include "mozilla/layers/PLayersChild.h"
#include "mozilla/layers/PLayersParent.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/Preferences.h"
#include "ipc/ShadowLayerChild.h"
@ -1676,6 +1677,9 @@ BasicLayerManager::EndTransactionInternal(DrawThebesLayerCallback aCallback,
}
PaintLayer(mTarget, mRoot, aCallback, aCallbackData, nsnull);
if (mWidget) {
FlashWidgetUpdateArea(mTarget);
}
if (!mTransactionIncomplete) {
// Clear out target if we have a complete transaction.
@ -1706,6 +1710,27 @@ BasicLayerManager::EndTransactionInternal(DrawThebesLayerCallback aCallback,
return !mTransactionIncomplete;
}
void
BasicLayerManager::FlashWidgetUpdateArea(gfxContext *aContext)
{
static bool sWidgetFlashingEnabled;
static bool sWidgetFlashingPrefCached = false;
if (!sWidgetFlashingPrefCached) {
sWidgetFlashingPrefCached = true;
mozilla::Preferences::AddBoolVarCache(&sWidgetFlashingEnabled,
"nglayout.debug.widget_update_flashing");
}
if (sWidgetFlashingEnabled) {
float r = float(rand()) / RAND_MAX;
float g = float(rand()) / RAND_MAX;
float b = float(rand()) / RAND_MAX;
aContext->SetColor(gfxRGBA(r, g, b, 0.2));
aContext->Paint();
}
}
bool
BasicLayerManager::EndEmptyTransaction()
{

2
gfx/layers/basic/BasicLayers.h
View File

@ -172,6 +172,8 @@ protected:
void* aCallbackData,
EndTransactionFlags aFlags = END_DEFAULT);
void FlashWidgetUpdateArea(gfxContext* aContext);
// Widget whose surface should be used as the basis for ThebesLayer
// buffers.
nsIWidget* mWidget;

4
modules/libpref/src/init/all.js
View File

@ -339,6 +339,10 @@ pref("nglayout.enable_drag_images", true);
// enable/disable paint flashing --- useful for debugging
pref("nglayout.debug.paint_flashing", false);
// enable/disable widget update area flashing --- only supported with
// BasicLayers (other layer managers always update the entire widget area)
pref("nglayout.debug.widget_update_flashing", false);
// scrollbar snapping region
// 0 - off
// 1 and higher - slider thickness multiple