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changeset: 468935:3b964face103
tag: tip
user: Martin Stransky <stransky@redhat.com>
date: Wed Apr 10 15:14:32 2019 +0200
summary: Bug 1508378 - Fix round error when damage rect size/position is odd number and scale factor is used, r=lsalzman
diff --git a/widget/gtk/WindowSurfaceWayland.cpp b/widget/gtk/WindowSurfaceWayland.cpp
--- a/widget/gtk/WindowSurfaceWayland.cpp
+++ b/widget/gtk/WindowSurfaceWayland.cpp
@@ -624,16 +624,33 @@ static void WaylandBufferDelayCommitHand
} else {
// Referenced WindowSurfaceWayland is already deleted.
// Do nothing but just release the mDelayedCommitHandle allocated at
// WindowSurfaceWayland::CommitWaylandBuffer().
free(aSurface);
}
}
+void WindowSurfaceWayland::CalcRectScale(LayoutDeviceIntRect& aRect, int aScale) {
+ if (aRect.x & 0x1) {
+ aRect.width += 1;
+ }
+ aRect.x = aRect.x / aScale;
+
+ if (aRect.y & 0x1) {
+ aRect.height += 1;
+ }
+ aRect.y = aRect.y / aScale;
+
+ aRect.width = (aRect.width & 0x1) ? aRect.width / aScale + 1 :
+ aRect.width / aScale;
+ aRect.height = (aRect.height & 0x1) ? aRect.height / aScale + 1 :
+ aRect.height / aScale;
+}
+
void WindowSurfaceWayland::CommitWaylandBuffer() {
MOZ_ASSERT(mPendingCommit, "Committing empty surface!");
if (mWaitToFullScreenUpdate) {
return;
}
wl_surface* waylandSurface = mWindow->GetWaylandSurface();
@@ -679,21 +696,23 @@ void WindowSurfaceWayland::CommitWayland
LayoutDeviceIntRect rect = mWindow->GetBounds();
wl_surface_damage(waylandSurface, 0, 0, rect.width, rect.height);
mWaylandBufferFullScreenDamage = false;
mNeedScaleFactorUpdate = true;
} else {
gint scaleFactor = mWindow->GdkScaleFactor();
for (auto iter = mWaylandBufferDamage.RectIter(); !iter.Done();
iter.Next()) {
- const mozilla::LayoutDeviceIntRect& r = iter.Get();
+ mozilla::LayoutDeviceIntRect r = iter.Get();
// We need to remove the scale factor because the wl_surface_damage
// also multiplies by current scale factor.
- wl_surface_damage(waylandSurface, r.x / scaleFactor, r.y / scaleFactor,
- r.width / scaleFactor, r.height / scaleFactor);
+ if (scaleFactor > 1) {
+ CalcRectScale(r, scaleFactor);
+ }
+ wl_surface_damage(waylandSurface, r.x, r.y, r.width, r.height);
}
}
// Clear all back buffer damage as we're committing
// all requested regions.
mWaylandBufferDamage.SetEmpty();
mFrameCallback = wl_surface_frame(waylandSurface);
diff --git a/widget/gtk/WindowSurfaceWayland.h b/widget/gtk/WindowSurfaceWayland.h
--- a/widget/gtk/WindowSurfaceWayland.h
+++ b/widget/gtk/WindowSurfaceWayland.h
@@ -96,16 +96,17 @@ class WindowSurfaceWayland : public Wind
WindowBackBuffer* GetWaylandBufferToDraw(int aWidth, int aHeight);
already_AddRefed<gfx::DrawTarget> LockWaylandBuffer(int aWidth, int aHeight,
bool aClearBuffer);
already_AddRefed<gfx::DrawTarget> LockImageSurface(
const gfx::IntSize& aLockSize);
bool CommitImageSurfaceToWaylandBuffer(const LayoutDeviceIntRegion& aRegion);
void CommitWaylandBuffer();
+ void CalcRectScale(LayoutDeviceIntRect& aRect, int scale);
// TODO: Do we need to hold a reference to nsWindow object?
nsWindow* mWindow;
nsWaylandDisplay* mWaylandDisplay;
WindowBackBuffer* mWaylandBuffer;
LayoutDeviceIntRegion mWaylandBufferDamage;
WindowBackBuffer* mBackupBuffer[BACK_BUFFER_NUM];
RefPtr<gfxImageSurface> mImageSurface;
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