path ops : make it real
Add an option to SkCanvas to turn on path
ops when combining clips.
Allow Op() to use one of the input paths
as an output path.
Fix a bug in Op() when the minuend is empty
and the subtrahend is not (for difference).
Change the build to allow core to depend on pathops.
Review URL: https://codereview.chromium.org/14474002
git-svn-id: http://skia.googlecode.com/svn/trunk@8855 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/pathopsskpclip.cpp b/gm/pathopsskpclip.cpp
new file mode 100644
index 0000000..b85b294
--- /dev/null
+++ b/gm/pathopsskpclip.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2013 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 "SkBitmap.h"
+#include "SkCanvas.h"
+#include "SkClipStack.h"
+#include "SkDevice.h"
+#include "SkPath.h"
+#include "SkPathOps.h"
+#include "SkPicture.h"
+#include "SkRect.h"
+
+namespace skiagm {
+
+class PathOpsSkpClipGM : public GM {
+public:
+ PathOpsSkpClipGM() {
+ }
+
+protected:
+ virtual SkString onShortName() SK_OVERRIDE {
+ return SkString("pathopsskpclip");
+ }
+
+ virtual SkISize onISize() SK_OVERRIDE {
+ return make_isize(1200, 900);
+ }
+
+ virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+ SkPicture* pict = SkNEW(SkPicture);
+ SkCanvas* rec = pict->beginRecording(1200, 900);
+ SkPath p;
+ SkRect r = {
+ SkIntToScalar(100),
+ SkIntToScalar(200),
+ SkIntToScalar(400),
+ SkIntToScalar(700)
+ };
+ p.addRoundRect(r, SkIntToScalar(50), SkIntToScalar(50));
+ rec->clipPath(p, SkRegion::kIntersect_Op, true);
+ rec->translate(SkIntToScalar(250), SkIntToScalar(250));
+ rec->clipPath(p, SkRegion::kIntersect_Op, true);
+ rec->drawColor(0xffff0000);
+ pict->endRecording();
+
+ canvas->setAllowSimplifyClip(true);
+ canvas->save();
+ canvas->drawPicture(*pict);
+ canvas->restore();
+
+ canvas->setAllowSimplifyClip(false);
+ canvas->save();
+ canvas->translate(SkIntToScalar(1200 / 2), 0);
+ canvas->drawPicture(*pict);
+ canvas->restore();
+ SkSafeUnref(pict);
+ }
+
+private:
+ typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static GM* MyFactory(void*) { return new PathOpsSkpClipGM; }
+static GMRegistry reg(MyFactory);
+
+}