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author | 2013-08-20 17:54:33 +0000 | |
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committer | 2013-08-20 17:54:33 +0000 | |
commit | 9615fed0057e6ef059b08f747d29cf9b00ef80d8 (patch) | |
tree | a29f269251550ba64aad35780b4e925e46643a2a /gm | |
parent | 3055b700189afdd02486ed8f2279cea1d8897243 (diff) |
Add a GM to test the clipping of canvas layers.
R=tomhudson@google.com
Review URL: https://codereview.chromium.org/22815012
git-svn-id: http://skia.googlecode.com/svn/trunk@10831 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'gm')
-rw-r--r-- | gm/canvasstate.cpp | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/gm/canvasstate.cpp b/gm/canvasstate.cpp index 1da8a14039..5dc90ef2ae 100644 --- a/gm/canvasstate.cpp +++ b/gm/canvasstate.cpp @@ -109,6 +109,74 @@ private: ////////////////////////////////////////////////////////////////////////////// +class CanvasLayerStateGM : public GM { +public: + CanvasLayerStateGM() { + fRedPaint.setColor(SK_ColorRED); + fRedPaint.setStyle(SkPaint::kFill_Style); + + fBluePaint.setColor(SK_ColorBLUE); + fBluePaint.setStyle(SkPaint::kFill_Style); + + fRect = SkRect::MakeXYWH(SPACER, SPACER, WIDTH-(2*SPACER), (HEIGHT-(2*SPACER)) / 7); + } + +protected: + virtual SkString onShortName() SK_OVERRIDE { + return SkString("canvas-layer-state"); + } + + virtual SkISize onISize() SK_OVERRIDE { + return SkISize::Make(WIDTH, HEIGHT); + } + + virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { + + // clear the canvas to red + canvas->drawColor(SK_ColorRED); + + // both rects should appear + drawTestPattern(canvas, 255, SkCanvas::kARGB_NoClipLayer_SaveFlag); + + canvas->translate(0, 2*(fRect.height() + 10)); + + // only the top rect should appear + drawTestPattern(canvas, 255, SkCanvas::kARGB_ClipLayer_SaveFlag); + + canvas->translate(0, 2*(fRect.height() + 10)); + + // only the bottom rect should appear + drawTestPattern(canvas, 0, SkCanvas::kARGB_NoClipLayer_SaveFlag); + } + + virtual uint32_t onGetFlags() const SK_OVERRIDE { return kSkipGPU_Flag; } + +private: + // draw a rect within the layer's bounds and again outside the layer's bounds + void drawTestPattern(SkCanvas* canvas, U8CPU layerAlpha, SkCanvas::SaveFlags flags) { + canvas->saveLayerAlpha(&fRect, layerAlpha, flags); + canvas->drawRect(fRect, fBluePaint); + canvas->translate(0, fRect.height() + 10); + canvas->drawRect(fRect, fBluePaint); + canvas->restore(); + } + + enum { + WIDTH = 400, + HEIGHT = 400, + SPACER = 10, + }; + + SkPaint fRedPaint; + SkPaint fBluePaint; + SkRect fRect; + + typedef GM INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + DEF_GM( return SkNEW(CanvasStateGM); ) +DEF_GM( return SkNEW(CanvasLayerStateGM); ) } // end namespace |