Try out scalar picture sizes

gm/distantclip.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 "gm.h"
 #include "SkCanvas.h"
 #include "SkPicture.h"
 #include "SkPictureRecorder.h"
 
 namespace skiagm {
 
 class DistantClipGM : public GM {
 public:
     DistantClipGM() { }
 
 protected:
 
     SkString onShortName() {
         return SkString("distantclip");
     }
 
     SkISize onISize() { return SkISize::Make(100, 100); }
 
     virtual void onDraw(SkCanvas* canvas) {
-        int offset = 35000;
-        int extents = 1000;
+        static const SkScalar kOffset = 35000.0f;
+        static const SkScalar kExtents = 1000.0f;
 
         SkPictureRecorder recorder;
         // We record a picture of huge vertical extents in which we clear the canvas to red, create
         // a 'extents' by 'extents' round rect clip at a vertical offset of 'offset', then draw
         // green into that.
-        SkCanvas* rec = recorder.beginRecording(100, offset + extents, NULL, 0);
-        rec->drawColor(0xffff0000);
+        SkCanvas* rec = recorder.beginRecording(kExtents, kOffset + kExtents, NULL, 0);
+        rec->drawColor(SK_ColorRED);
         rec->save();
-        SkRect r = {
-            SkIntToScalar(-extents),
-            SkIntToScalar(offset - extents),
-            SkIntToScalar(extents),
-            SkIntToScalar(offset + extents)
-        };
+        SkRect r = SkRect::MakeXYWH(-kExtents, kOffset - kExtents, 2 * kExtents, 2 * kExtents);
         SkPath p;
         p.addRoundRect(r, 5, 5);
         rec->clipPath(p, SkRegion::kIntersect_Op, true);
-        rec->drawColor(0xff00ff00);
+        rec->drawColor(SK_ColorGREEN);
         rec->restore();
         SkAutoTUnref<SkPicture> pict(recorder.endRecording());
 
         // Next we play that picture into another picture of the same size.
-        pict->draw(recorder.beginRecording(100, offset + extents, NULL, 0));
+        pict->draw(recorder.beginRecording(pict->cullRect().width(), 
+                                           pict->cullRect().height(), 
+                                           NULL, 0));
         SkAutoTUnref<SkPicture> pict2(recorder.endRecording());
 
         // Finally we play the part of that second picture that should be green into the canvas.
         canvas->save();
-        canvas->translate(SkIntToScalar(extents / 2),
-                          SkIntToScalar(-(offset - extents / 2)));
+        canvas->translate(kExtents / 2, -(kOffset - kExtents / 2));
         pict2->draw(canvas);
         canvas->restore();
 
         // If the image is red, we erroneously decided the clipPath was empty and didn't record
         // the green drawColor, if it's green we're all good.
     }
 
 private:
     typedef GM INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new DistantClipGM; }
 static GMRegistry reg(MyFactory);
 
 }