af35920e6d
Note: I initially implemented this as a fully-generic SkResizeImageFilter, but then I realized that the dstRect should always be transformed by the filter matrix, but that the srcRect should not (since it's specified relative to the dimensions of the original bitmap). Since this would be confusing for someone attempting to use this as a generic resizing filter, I decided to build the functionality into SkBitmapSource instead. BUG= R=reed@google.com Review URL: https://codereview.chromium.org/106933002 git-svn-id: http://skia.googlecode.com/svn/trunk@12522 2bbb7eff-a529-9590-31e7-b0007b416f81
96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
/*
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* Copyright 2013 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 "SkBitmapSource.h"
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class BitmapSourceGM : public skiagm::GM {
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public:
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BitmapSourceGM() : fInitialized(false) {
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}
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protected:
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virtual SkString onShortName() {
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return SkString("bitmapsource");
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}
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void make_bitmap() {
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fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
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fBitmap.allocPixels();
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SkBitmapDevice device(fBitmap);
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SkCanvas canvas(&device);
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canvas.clear(0x00000000);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setColor(0xFFFFFFFF);
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paint.setTextSize(SkIntToScalar(96));
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const char* str = "e";
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canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint);
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}
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virtual SkISize onISize() { return SkISize::Make(500, 150); }
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virtual void onDraw(SkCanvas* canvas) {
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if (!fInitialized) {
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this->make_bitmap();
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fInitialized = true;
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}
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canvas->clear(0x00000000);
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{
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SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30);
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SkRect dstRect = SkRect::MakeXYWH(0, 10, 60, 60);
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SkRect clipRect = SkRect::MakeXYWH(0, 0, 100, 100);
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SkRect bounds;
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fBitmap.getBounds(&bounds);
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SkAutoTUnref<SkImageFilter> bitmapSource(new SkBitmapSource(fBitmap));
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SkAutoTUnref<SkImageFilter> bitmapSourceSrcRect(new SkBitmapSource(fBitmap, srcRect, srcRect));
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SkAutoTUnref<SkImageFilter> bitmapSourceSrcRectDstRect(new SkBitmapSource(fBitmap, srcRect, dstRect));
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SkAutoTUnref<SkImageFilter> bitmapSourceDstRectOnly(new SkBitmapSource(fBitmap, bounds, dstRect));
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SkPaint paint;
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paint.setImageFilter(bitmapSource);
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canvas->save();
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canvas->clipRect(clipRect);
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canvas->drawPaint(paint);
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canvas->restore();
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canvas->translate(SkIntToScalar(100), 0);
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paint.setImageFilter(bitmapSourceSrcRect);
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canvas->save();
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canvas->clipRect(clipRect);
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canvas->drawPaint(paint);
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canvas->restore();
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canvas->translate(SkIntToScalar(100), 0);
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paint.setImageFilter(bitmapSourceSrcRectDstRect);
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canvas->save();
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canvas->clipRect(clipRect);
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canvas->drawPaint(paint);
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canvas->restore();
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canvas->translate(SkIntToScalar(100), 0);
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paint.setImageFilter(bitmapSourceDstRectOnly);
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canvas->save();
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canvas->clipRect(clipRect);
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canvas->drawPaint(paint);
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canvas->restore();
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canvas->translate(SkIntToScalar(100), 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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SkBitmap fBitmap;
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bool fInitialized;
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};
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///////////////////////////////////////////////////////////////////////////////
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static skiagm::GM* MyFactory(void*) { return new BitmapSourceGM; }
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static skiagm::GMRegistry reg(MyFactory);
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