Convert GrClip to an abstract base class

src/gpu/GrClip.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 "GrClip.h"
 
-#include "GrSurface.h"
-#include "SkRect.h"
+#include "GrClipMaskManager.h"
 
-///////////////////////////////////////////////////////////////////////////////
-
-/**
- * getConservativeBounds returns the conservative bounding box of the clip
- * in device (as opposed to canvas) coordinates. If the bounding box is
- * the result of purely intersections of rects (with an initial replace)
- * isIntersectionOfRects will be set to true.
- */
-void GrClip::getConservativeBounds(int width, int height, SkIRect* devResult,
-                                   bool* isIntersectionOfRects) const {
-    switch (fClipType) {
-        case kWideOpen_ClipType: {
-            devResult->setLTRB(0, 0, width, height);
-            if (isIntersectionOfRects) {
-                *isIntersectionOfRects = true;
-            }
-        } break;
-        case kIRect_ClipType: {
-            *devResult = this->irect();
-            if (isIntersectionOfRects) {
-                *isIntersectionOfRects = true;
-            }
-        } break;
-        case kClipStack_ClipType: {
-            SkRect devBounds;
-            this->clipStack()->getConservativeBounds(-this->origin().fX,
-                                                     -this->origin().fY,
-                                                     width,
-                                                     height,
-                                                     &devBounds,
-                                                     isIntersectionOfRects);
-            devBounds.roundOut(devResult);
-        } break;
-
+void GrNoClip::getConservativeBounds(int width, int height, SkIRect* devResult,
+                                     bool* isIntersectionOfRects) const {
+    devResult->setXYWH(0, 0, width, height);
+    if (isIntersectionOfRects) {
+        *isIntersectionOfRects = true;
     }
 }
 
-const GrClip& GrClip::WideOpen() {
-    static const GrClip clip;
-    return clip;
+bool GrFixedClip::quickContains(const SkRect& rect) const {
+    if (fHasStencilClip) {
+        return false;
+    }
+    if (!fScissorState.enabled()) {
+        return true;
+    }
+    return fScissorState.rect().contains(rect);
 }
+
+void GrFixedClip::getConservativeBounds(int width, int height, SkIRect* devResult,
+                                        bool* isIntersectionOfRects) const {
+    devResult->setXYWH(0, 0, width, height);
+    if (fScissorState.enabled()) {
+        if (!devResult->intersect(fScissorState.rect())) {
+            devResult->setEmpty();
+        }
+    }
+    if (isIntersectionOfRects) {
+        *isIntersectionOfRects = true;
+    }
+}
+
+bool GrFixedClip::apply(GrClipMaskManager*, const GrPipelineBuilder& pipelineBuilder,
+                        const SkRect* devBounds, GrAppliedClip* out) const {
+    if (fScissorState.enabled()) {
+        const GrRenderTarget* rt = pipelineBuilder.getRenderTarget();
+        SkIRect tightScissor;
+        if (!tightScissor.intersect(fScissorState.rect(),
+                                    SkIRect::MakeWH(rt->width(), rt->height()))) {
+            return false;
+        }
+        if (devBounds && !devBounds->intersects(SkRect::Make(tightScissor))) {
+            return false;
+        }
+        out->fScissorState.set(tightScissor);
+    }
+    out->fHasStencilClip = fHasStencilClip;
+    return true;
+}
+
+bool GrClipStackClip::quickContains(const SkRect& rect) const {
+    if (!fStack) {
+        return true;
+    }
+    return fStack->quickContains(rect.makeOffset(SkIntToScalar(fOrigin.x()),
+                                                 SkIntToScalar(fOrigin.y())));
+}
+
+void GrClipStackClip::getConservativeBounds(int width, int height, SkIRect* devResult,
+                                            bool* isIntersectionOfRects) const {
+    if (!fStack) {
+        devResult->setXYWH(0, 0, width, height);
+        if (isIntersectionOfRects) {
+            *isIntersectionOfRects = true;
+        }
+        return;
+    }
+    SkRect devBounds;
+    fStack->getConservativeBounds(-fOrigin.x(), -fOrigin.y(), width, height, &devBounds,
+                                  isIntersectionOfRects);
+    devBounds.roundOut(devResult);
+}
+
+bool GrClipStackClip::apply(GrClipMaskManager* clipMaskManager,
+                            const GrPipelineBuilder& pipelineBuilder, const SkRect* devBounds,
+                            GrAppliedClip* out) const {
+    // TODO: Collapse ClipMaskManager into this class.(?)
+    return clipMaskManager->setupClipping(pipelineBuilder, *this, devBounds, out);
+}