Add a method in SkCanvas to set "hard" clip bounds.

Add SkCanvas::setBoundRect, which sets the max clip rectangle,
which can be replaced by clipRect, clipRRect and clipPath.

BUG=skia:

Change-Id: Ie39eb1715214971576e7a1dda760c6997a7e0208
Reviewed-on: https://skia-review.googlesource.com/5359
Commit-Queue: Stan Iliev <stani@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>

1 files changed, 97 insertions, 0 deletions

diff --git a/gm/complexclip4.cpp b/gm/complexclip4.cpp
new file mode 100644
index 0000000000..2765ceb5de
--- /dev/null
+++ b/gm/complexclip4.cpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2016 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 "SkPath.h"
+#include "SkClipOpPriv.h"
+
+namespace skiagm {
+
+//this test exercise SkCanvas::setDeviceClipRestriction behavior
+class ComplexClip4GM : public GM {
+public:
+  ComplexClip4GM(bool aaclip)
+    : fDoAAClip(aaclip) {
+        this->setBGColor(0xFFDEDFDE);
+    }
+
+protected:
+
+
+    SkString onShortName() {
+        SkString str;
+        str.printf("complexclip4_%s",
+                   fDoAAClip ? "aa" : "bw");
+        return str;
+    }
+
+    SkISize onISize() { return SkISize::Make(970, 780); }
+
+    virtual void onDraw(SkCanvas* canvas) {
+        SkPaint p;
+        p.setAntiAlias(fDoAAClip);
+        p.setColor(SK_ColorYELLOW);
+
+        canvas->save();
+            // draw a yellow rect through a rect clip
+            canvas->save();
+                canvas->androidFramework_setDeviceClipRestriction(SkIRect::MakeLTRB(100, 100, 300, 300));
+                canvas->drawColor(SK_ColorGREEN);
+                canvas->clipRect(SkRect::MakeLTRB(100, 200, 400, 500),
+                                 kReplace_SkClipOp, fDoAAClip);
+                canvas->drawRect(SkRect::MakeLTRB(100, 200, 400, 500), p);
+            canvas->restore();
+
+            // draw a yellow rect through a diamond clip
+            canvas->save();
+                canvas->androidFramework_setDeviceClipRestriction(SkIRect::MakeLTRB(500, 100, 800, 300));
+                canvas->drawColor(SK_ColorGREEN);
+
+                SkPath pathClip;
+                pathClip.moveTo(SkIntToScalar(650),  SkIntToScalar(200));
+                pathClip.lineTo(SkIntToScalar(900), SkIntToScalar(300));
+                pathClip.lineTo(SkIntToScalar(650), SkIntToScalar(400));
+                pathClip.lineTo(SkIntToScalar(650), SkIntToScalar(300));
+                pathClip.close();
+                canvas->clipPath(pathClip, kReplace_SkClipOp, fDoAAClip);
+                canvas->drawRect(SkRect::MakeLTRB(500, 200, 900, 500), p);
+            canvas->restore();
+
+            // draw a yellow rect through a round rect clip
+            canvas->save();
+                canvas->androidFramework_setDeviceClipRestriction(SkIRect::MakeLTRB(500, 500, 800, 700));
+                canvas->drawColor(SK_ColorGREEN);
+
+                canvas->clipRRect(SkRRect::MakeOval(SkRect::MakeLTRB(500, 600, 900, 750)),
+                                  kReplace_SkClipOp, fDoAAClip);
+                canvas->drawRect(SkRect::MakeLTRB(500, 600, 900, 750), p);
+            canvas->restore();
+
+            // fill the clip with yellow color showing that androidFramework_setDeviceClipRestriction
+            // intersects with the current clip
+            canvas->save();
+                canvas->clipRect(SkRect::MakeLTRB(100, 400, 300, 750),
+                                 kIntersect_SkClipOp, fDoAAClip);
+                canvas->drawColor(SK_ColorGREEN);
+                canvas->androidFramework_setDeviceClipRestriction(SkIRect::MakeLTRB(150, 450, 250, 700));
+                canvas->drawColor(SK_ColorYELLOW);
+            canvas->restore();
+
+        canvas->restore();
+    }
+private:
+
+    bool fDoAAClip;
+
+    typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+DEF_GM(return new ComplexClip4GM(false);)
+DEF_GM(return new ComplexClip4GM(true);)
+}