зеркало из https://github.com/mozilla/moz-skia.git
87 строки
2.7 KiB
C++
87 строки
2.7 KiB
C++
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkBitmap.h"
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#include "SkCanvas.h"
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#include "SkDevice.h"
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#include "SkString.h"
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#include "SkSurface.h"
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namespace skiagm {
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static void create_bitmap(SkBitmap* bitmap) {
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const int W = 100;
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const int H = 100;
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bitmap->allocN32Pixels(W, H);
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SkCanvas canvas(*bitmap);
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canvas.drawColor(SK_ColorRED);
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SkPaint paint;
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paint.setColor(SK_ColorBLUE);
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canvas.drawCircle(SkIntToScalar(W)/2, SkIntToScalar(H)/2, SkIntToScalar(W)/2, paint);
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}
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class ExtractBitmapGM : public GM {
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public:
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ExtractBitmapGM() {}
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protected:
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// overrides from SkEventSink
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virtual SkString onShortName() SK_OVERRIDE {
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return SkString("extractbitmap");
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}
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virtual SkISize onISize() SK_OVERRIDE {
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return make_isize(600, 600);
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}
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virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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SkBitmap bitmap;
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create_bitmap(&bitmap);
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int x = bitmap.width() / 2;
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int y = bitmap.height() / 2;
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canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
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canvas->drawBitmap(bitmap, 0, 0);
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{
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// Do some subset drawing. This will test that an SkGPipe properly
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// handles the case where bitmaps share a pixelref
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// Draw the bottom right fourth of the bitmap over the top left
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SkBitmap subset;
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bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y));
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canvas->drawBitmap(subset, 0, 0);
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// Draw the top left corner over the bottom right
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bitmap.extractSubset(&subset, SkIRect::MakeWH(x, y));
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canvas->drawBitmap(subset, SkIntToScalar(x), SkIntToScalar(y));
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// Draw a subset which has the same height and pixelref offset but a
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// different width
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bitmap.extractSubset(&subset, SkIRect::MakeWH(x, bitmap.height()));
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SkAutoCanvasRestore autoRestore(canvas, true);
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canvas->translate(0, SkIntToScalar(bitmap.height() + 20));
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canvas->drawBitmap(subset, 0, 0);
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// Now draw a subet which has the same width and pixelref offset but
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// a different height
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bitmap.extractSubset(&subset, SkIRect::MakeWH(bitmap.height(), y));
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canvas->translate(0, SkIntToScalar(bitmap.height() + 20));
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canvas->drawBitmap(subset, 0, 0);
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}
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}
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private:
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new ExtractBitmapGM; }
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static GMRegistry reg(MyFactory);
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}
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