Add visualization of clips to debugger

src/utils/debugger/SkDebugCanvas.cpp

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkColorPriv.h"
 #include "SkDebugCanvas.h"
 #include "SkDrawCommand.h"
 #include "SkDrawFilter.h"
 #include "SkDevice.h"
 #include "SkXfermode.h"
 
 SkDebugCanvas::SkDebugCanvas(int width, int height)
         : INHERITED(width, height)
         , fWidth(width)
         , fHeight(height)
         , fFilter(false)
+        , fMegaVizMode(false)
         , fIndex(0)
         , fOverdrawViz(false)
         , fOverdrawFilter(NULL)
         , fOverrideTexFiltering(false)
         , fTexOverrideFilter(NULL)
         , fOutstandingSaveCount(0) {
     fUserMatrix.reset();
 
     // SkPicturePlayback uses the base-class' quickReject calls to cull clipped
     // operations. This can lead to problems in the debugger which expects all
@@ skipping 122 matching lines @@
         return true;
     }
 
 protected:
     SkPaint::FilterLevel fFilterLevel;
 
 private:
     typedef SkDrawFilter INHERITED;
 };
 
+class SkDebugClipVisitor : public SkCanvas::ClipVisitor {
+public:
+    SkDebugClipVisitor(SkCanvas* canvas) : fCanvas(canvas) {}
+
+    virtual void clipRect(const SkRect& r, SkRegion::Op, bool doAA) SK_OVERRIDE {
+        SkPaint p;
+        p.setColor(SK_ColorRED);
+        p.setStyle(SkPaint::kStroke_Style);
+        p.setAntiAlias(doAA);
+        fCanvas->drawRect(r, p);
+    }
+    virtual void clipRRect(const SkRRect& rr, SkRegion::Op, bool doAA) SK_OVERRIDE {
+        SkPaint p;
+        p.setColor(SK_ColorGREEN);
+        p.setStyle(SkPaint::kStroke_Style);
+        p.setAntiAlias(doAA);
+        fCanvas->drawRRect(rr, p);
+    }
+    virtual void clipPath(const SkPath& path, SkRegion::Op, bool doAA) SK_OVERRIDE {
+        SkPaint p;
+        p.setColor(SK_ColorBLUE);
+        p.setStyle(SkPaint::kStroke_Style);
+        p.setAntiAlias(doAA);
+        fCanvas->drawPath(path, p);
+    }
+
+protected:
+    SkCanvas* fCanvas;
+
+private:
+    typedef SkCanvas::ClipVisitor INHERITED;
+};
+
+// set up the saveLayer commands so that the active ones
+// return true in their 'active' method
+void SkDebugCanvas::markActiveSaveLayers(int index) {
+    SkTDArray<SkDrawCommand*> activeLayers;
+
+    for (int i = 0; i < fCommandVector.count(); ++i) {
+        fCommandVector[i]->setActive(false);
+    }
+
+    for (int i = 0; i < index; ++i) {
+        SkDrawCommand::Action result = fCommandVector[i]->action();
+        if (SkDrawCommand::kPush_Action == result) {
+            activeLayers.push(fCommandVector[i]);
+        } else if (SkDrawCommand::kPop_Action == result) {
+            activeLayers.pop();
+        }
+    }
+
+    for (int i = 0; i < activeLayers.count(); ++i) {
+        activeLayers[i]->setActive(true);
+    }
+}
+
 void SkDebugCanvas::drawTo(SkCanvas* canvas, int index) {
     SkASSERT(!fCommandVector.isEmpty());
     SkASSERT(index < fCommandVector.count());
     int i = 0;
 
     // This only works assuming the canvas and device are the same ones that
     // were previously drawn into because they need to preserve all saves
     // and restores.
     // The visibility filter also requires a full re-draw - otherwise we can
     // end up drawing the filter repeatedly.
-    if (fIndex < index && !fFilter) {
+    if (fIndex < index && !fFilter && !fMegaVizMode) {
         i = fIndex + 1;
     } else {
         for (int j = 0; j < fOutstandingSaveCount; j++) {
             canvas->restore();
         }
         canvas->clear(SK_ColorTRANSPARENT);
         canvas->resetMatrix();
         SkRect rect = SkRect::MakeWH(SkIntToScalar(fWidth),
                                      SkIntToScalar(fHeight));
         canvas->clipRect(rect, SkRegion::kReplace_Op );
@@ skipping 18 matching lines @@
             fTexOverrideFilter = new SkTexOverrideFilter;
         }
 
         if (fTexOverrideFilter != canvas->getDrawFilter()) {
             canvas->setDrawFilter(fTexOverrideFilter);
         }
     } else {
         canvas->setDrawFilter(NULL);
     }
 
+    if (fMegaVizMode) {
+        this->markActiveSaveLayers(index);
+    }
+
     for (; i <= index; i++) {
         if (i == index && fFilter) {
             SkPaint p;
             p.setColor(0xAAFFFFFF);
             canvas->save();
             canvas->resetMatrix();
             SkRect mask;
             mask.set(SkIntToScalar(0), SkIntToScalar(0),
                     SkIntToScalar(fWidth), SkIntToScalar(fHeight));
             canvas->clipRect(mask, SkRegion::kReplace_Op, false);
             canvas->drawRectCoords(SkIntToScalar(0), SkIntToScalar(0),
                     SkIntToScalar(fWidth), SkIntToScalar(fHeight), p);
             canvas->restore();
         }
 
         if (fCommandVector[i]->isVisible()) {
-            fCommandVector[i]->execute(canvas);
-            fCommandVector[i]->trackSaveState(&fOutstandingSaveCount);
+            if (fMegaVizMode && fCommandVector[i]->active()) {
+                // All active saveLayers get replaced with saves so all draws go to the
+                // visible canvas
+                canvas->save();
+                ++fOutstandingSaveCount;
+            } else {
+                fCommandVector[i]->execute(canvas);
+                fCommandVector[i]->trackSaveState(&fOutstandingSaveCount);
+            }
         }
     }
+
+    if (fMegaVizMode) {
+        SkRect r = SkRect::MakeWH(SkIntToScalar(fWidth), SkIntToScalar(fHeight));
+        r.outset(SK_Scalar1, SK_Scalar1);
+
+        canvas->save();
+        // nuke the CTM
+        canvas->setMatrix(SkMatrix::I());
+        // turn off clipping
+        canvas->clipRect(r, SkRegion::kReplace_Op);
+
+        // visualize existing clips
+        SkDebugClipVisitor visitor(canvas);
+
+        canvas->replayClips(&visitor);
+
+        canvas->restore();
+    }
     fMatrix = canvas->getTotalMatrix();
     fClip = canvas->getTotalClip().getBounds();
     fIndex = index;
 }
 
 void SkDebugCanvas::deleteDrawCommandAt(int index) {
     SkASSERT(index < fCommandVector.count());
     delete fCommandVector[index];
     fCommandVector.remove(index);
 }
@@ skipping 31 matching lines @@
 SkTArray<SkString>* SkDebugCanvas::getDrawCommandsAsStrings() const {
     SkTArray<SkString>* commandString = new SkTArray<SkString>(fCommandVector.count());
     if (!fCommandVector.isEmpty()) {
         for (int i = 0; i < fCommandVector.count(); i ++) {
             commandString->push_back() = fCommandVector[i]->toString();
         }
     }
     return commandString;
 }
 
-void SkDebugCanvas::toggleFilter(bool toggle) {
-    fFilter = toggle;
-}
-
 void SkDebugCanvas::overrideTexFiltering(bool overrideTexFiltering, SkPaint::FilterLevel level) {
     if (NULL == fTexOverrideFilter) {
         fTexOverrideFilter = new SkTexOverrideFilter;
     }
 
     fOverrideTexFiltering = overrideTexFiltering;
     fTexOverrideFilter->setFilterLevel(level);
 }
 
 void SkDebugCanvas::clear(SkColor color) {
@@ skipping 173 matching lines @@
 
 bool SkDebugCanvas::translate(SkScalar dx, SkScalar dy) {
     addDrawCommand(new SkTranslateCommand(dx, dy));
     return true;
 }
 
 void SkDebugCanvas::toggleCommand(int index, bool toggle) {
     SkASSERT(index < fCommandVector.count());
     fCommandVector[index]->setVisible(toggle);
 }