Improve usage of window rectangles

src/gpu/GrFixedClip.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrFixedClip.h"
 
 #include "GrAppliedClip.h"
 #include "GrDrawContext.h"
 
-void GrFixedClip::getConservativeBounds(int width, int height, SkIRect* devResult,
-                                        bool* isIntersectionOfRects) const {
-    devResult->setXYWH(0, 0, width, height);
+bool GrFixedClip::quickContains(const SkRect& rect) const {
+    if (!fWindowRectsState.disabled()) {
+        return false;
+    }
+    return !fScissorState.enabled() || GrClip::IsInsideClip(fScissorState.rect(), rect);
+}
+
+void GrFixedClip::getConservativeBounds(int w, int h, SkIRect* devResult, bool* iior) const {
+    devResult->setXYWH(0, 0, w, h);
     if (fScissorState.enabled()) {
         if (!devResult->intersect(fScissorState.rect())) {
             devResult->setEmpty();
         }
     }
-    if (isIntersectionOfRects) {
-        *isIntersectionOfRects = true;
+    if (iior) {
+        *iior = true;
     }
 }
 
-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())) {
             return false;
         }
         if (!IsInsideClip(fScissorState.rect(), out->clippedDrawBounds())) {
             out->addScissor(tightScissor);
         }
     }
 
+    if (!fWindowRectsState.disabled()) {
+        out->addWindowRectangles(fWindowRectsState);
+    }
+
     return true;
 }
 
 const GrFixedClip& GrFixedClip::Disabled() {
     static const GrFixedClip disabled = GrFixedClip();
     return disabled;
 }