Prevent picture recording from over optimizing the culling of clips.
BUG=skia:1496
R=mtklein@google.com, reed@google.com, robertphillips@google.com
Review URL: https://codereview.chromium.org/22875008
git-svn-id: http://skia.googlecode.com/svn/trunk@10689 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/canvasstate.cpp b/gm/canvasstate.cpp
new file mode 100644
index 0000000..1a26bf0
--- /dev/null
+++ b/gm/canvasstate.cpp
@@ -0,0 +1,113 @@
+/*
+ * 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 "SkCanvas.h"
+#include "SkPaint.h"
+#include "SkPath.h"
+#include "SkRect.h"
+
+namespace skiagm {
+
+/*
+ * This GM exercises the flags to SkCanvas::save(). The canvas' save() and
+ * restore actions can be limited to only a portion of the canvas' state through
+ * the use of flags when calling save.
+ */
+class CanvasStateGM : public GM {
+ SkSize fSize;
+ enum {
+ WIDTH = 150,
+ HEIGHT = 150,
+ };
+
+ SkPaint fFillPaint;
+ SkPaint fStrokePaint;
+
+ SkPath fPath;
+
+ SkRect fOutlineRect;
+ SkRect fFillRect;
+
+
+public:
+ CanvasStateGM() {
+ fSize.set(SkIntToScalar(WIDTH), SkIntToScalar(HEIGHT));
+
+ fFillPaint.setColor(SK_ColorRED);
+ fFillPaint.setStyle(SkPaint::kFill_Style);
+
+ fStrokePaint.setColor(SK_ColorBLUE);
+ fStrokePaint.setStyle(SkPaint::kStroke_Style);
+ fStrokePaint.setStrokeWidth(1);
+
+ fPath.moveTo(25, 25);
+ fPath.lineTo(125, 25);
+ fPath.lineTo(75, 125);
+ fPath.close();
+
+ fOutlineRect = SkRect::MakeXYWH(1, 1, WIDTH-2, HEIGHT-2);
+ fFillRect = SkRect::MakeXYWH(10, 10, WIDTH-20, HEIGHT-20);
+ }
+
+protected:
+ virtual SkString onShortName() SK_OVERRIDE {
+ return SkString("canvas-state");
+ }
+
+ virtual SkISize onISize() SK_OVERRIDE {
+ return SkISize::Make(WIDTH*3, HEIGHT*4);
+ }
+
+ virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+
+ SkCanvas::SaveFlags flags[] = { SkCanvas::kMatrix_SaveFlag,
+ SkCanvas::kClip_SaveFlag,
+ SkCanvas::kMatrixClip_SaveFlag };
+
+ // columns -- flags
+ // rows -- permutations of setting the clip and matrix
+ for (size_t i = 0; i < SK_ARRAY_COUNT(flags); ++i) {
+ for (int j = 0; j < 2; ++j) {
+ for (int k = 0; k < 2; ++k) {
+ this->drawTestPattern(i, (2*j)+k, canvas, flags[i], j, k);
+ }
+ }
+ }
+ }
+
+
+ virtual uint32_t onGetFlags() SK_OVERRIDE const { return kSkipPicture_Flag; }
+
+private:
+ void drawTestPattern(int x, int y, SkCanvas* canvas,
+ SkCanvas::SaveFlags flags, bool doClip, bool doScale) {
+ canvas->save();
+ canvas->translate(x*WIDTH, y*HEIGHT);
+
+ canvas->drawRect(fOutlineRect, fStrokePaint);
+ canvas->save(flags);
+ if(doClip) {
+ canvas->clipPath(fPath);
+ }
+ if (doScale) {
+ canvas->scale(0.5, 0.5);
+ }
+ canvas->restore();
+ canvas->drawRect(fFillRect, fFillPaint);
+
+ canvas->restore();
+ }
+
+ typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+DEF_GM( return SkNEW(CanvasStateGM); )
+
+} // end namespace