[GTK4] WebView is flipped

https://bugs.webkit.org/show_bug.cgi?id=218354

Reviewed by Adrian Perez de Castro.

Stop painting y-flipped textures when buildig with GTK4.

* UIProcess/gtk/AcceleratedBackingStoreWayland.cpp:
(WebKit::AcceleratedBackingStoreWayland::snapshot):
* WebProcess/WebPage/libwpe/AcceleratedSurfaceLibWPE.h:

Canonical link: https://commits.webkit.org/231411@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@269621 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebKit/ChangeLog

@@ -1,3 +1,16 @@
+2020-11-10  Carlos Garcia Campos  <cgarcia@igalia.com>
+
+        [GTK4] WebView is flipped
+        https://bugs.webkit.org/show_bug.cgi?id=218354
+
+        Reviewed by Adrian Perez de Castro.
+
+        Stop painting y-flipped textures when buildig with GTK4.
+
+        * UIProcess/gtk/AcceleratedBackingStoreWayland.cpp:
+        (WebKit::AcceleratedBackingStoreWayland::snapshot):
+        * WebProcess/WebPage/libwpe/AcceleratedSurfaceLibWPE.h:
+
 2020-11-10  Carlos Garcia Campos  <cgarcia@igalia.com>
 
         [GTK] Crash in WebKit::DropTarget::drop

Source/WebKit/UIProcess/gtk/AcceleratedBackingStoreWayland.cpp

@@ -552,12 +552,6 @@ void AcceleratedBackingStoreWayland::snapshot(GtkSnapshot* gtkSnapshot)
 
     graphene_rect_t bounds = GRAPHENE_RECT_INIT(0, 0, static_cast<float>(cairo_image_surface_get_width(m_surface.get())), static_cast<float>(cairo_image_surface_get_height(m_surface.get())));
     RefPtr<cairo_t> cr = adoptRef(gtk_snapshot_append_cairo(gtkSnapshot, &bounds));
-
-    // The compositor renders the texture flipped for gdk, fix that here.
-    cairo_matrix_t transform;
-    cairo_matrix_init(&transform, 1, 0, 0, -1, 0, cairo_image_surface_get_height(m_surface.get()) / m_webPage.deviceScaleFactor());
-    cairo_transform(cr.get(), &transform);
-
     cairo_set_source_surface(cr.get(), m_surface.get(), 0, 0);
     cairo_set_operator(cr.get(), CAIRO_OPERATOR_OVER);
     cairo_paint(cr.get());

Source/WebKit/WebProcess/WebPage/libwpe/AcceleratedSurfaceLibWPE.h

@@ -46,7 +46,7 @@ class AcceleratedSurfaceLibWPE final : public AcceleratedSurface {
     void clientResize(const WebCore::IntSize&) override;
     bool shouldPaintMirrored() const override
     {
-#if PLATFORM(GTK)
+#if PLATFORM(GTK) && !USE(GTK4)
         return true;
 #else
         return false;