Improve usage of window rectangles

src/gpu/GrFixedClip.cpp

Index: src/gpu/GrFixedClip.cpp
diff --git a/src/gpu/GrFixedClip.cpp b/src/gpu/GrFixedClip.cpp
index ebdd49bbf80f1ea789c8d1a5b61a94337ecf035a..da3e651326f778fb0c0b8145bed77c4fa9d169a5 100644
--- a/src/gpu/GrFixedClip.cpp
+++ b/src/gpu/GrFixedClip.cpp
@@ -10,6 +10,13 @@
 #include "GrAppliedClip.h"
 #include "GrDrawContext.h"
 
+bool GrFixedClip::quickContains(const SkRect& rect) const {
+    if (!fWindowRectsState.disabled()) {
+        return false;
+    }
+    return !fScissorState.enabled() || GrClip::IsInsideClip(fScissorState.rect(), rect);
+}
+
 void GrFixedClip::getConservativeBounds(int width, int height, SkIRect* devResult,
                                         bool* isIntersectionOfRects) const {
     devResult->setXYWH(0, 0, width, height);
@@ -23,12 +30,26 @@ void GrFixedClip::getConservativeBounds(int width, int height, SkIRect* devResul
     }
 }
 
-bool GrFixedClip::apply(GrContext*, GrDrawContext* drawContext, bool isHWAntiAlias,
-                        bool hasUserStencilSettings, GrAppliedClip* out) const {
+bool GrFixedClip::isRRect(const SkRect& rtBounds, SkRRect* rr, bool* aa) const {
+    if (!fWindowRectsState.disabled()) {
+        return false;
+    }
     if (fScissorState.enabled()) {
-        SkIRect tightScissor;
-        if (!tightScissor.intersect(fScissorState.rect(),
-                                    SkIRect::MakeWH(drawContext->width(), drawContext->height()))) {
+        SkRect rect = SkRect::Make(fScissorState.rect());
+        if (!rect.intersects(rtBounds)) {
+            return false;
+        }
+        rr->setRect(rect);
+        *aa = false;
+        return true;
+    }
+    return false;
+};
+
+bool GrFixedClip::apply(GrContext*, GrDrawContext* dc, bool, bool, GrAppliedClip* out) const {
+    if (fScissorState.enabled()) {
+        SkIRect tightScissor = SkIRect::MakeWH(dc->width(), dc->height());
+        if (!tightScissor.intersect(fScissorState.rect())) {
             return false;
         }
         if (IsOutsideClip(tightScissor, out->clippedDrawBounds())) {
@@ -39,6 +60,10 @@ bool GrFixedClip::apply(GrContext*, GrDrawContext* drawContext, bool isHWAntiAli
         }
     }
 
+    if (!fWindowRectsState.disabled()) {
+        out->addWindowRectangles() = fWindowRectsState;
+    }
+
     return true;
 }