81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
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/*
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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 "SkImage.h"
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#include "SkImageSource.h"
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// This GM exercises the SkImageSource ImageFilter class.
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class ImageSourceGM : public skiagm::GM {
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public:
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ImageSourceGM() { }
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protected:
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SkString onShortName() override {
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return SkString("imagesource");
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}
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SkISize onISize() override { return SkISize::Make(500, 150); }
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void onOnceBeforeDraw() override {
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SkBitmap bm = sk_tool_utils::create_string_bitmap(100, 100, 0xFFFFFFFF, 20, 70, 96, "e");
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fImage.reset(SkImage::NewFromBitmap(bm));
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}
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static void FillRectFiltered(SkCanvas* canvas, const SkRect& clipRect, SkImageFilter* filter) {
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SkPaint paint;
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paint.setImageFilter(filter);
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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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}
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void onDraw(SkCanvas* canvas) override {
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canvas->clear(SK_ColorBLACK);
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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 = SkRect::MakeIWH(fImage->width(), fImage->height());
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SkAutoTUnref<SkImageFilter> imageSource(SkImageSource::Create(fImage));
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SkAutoTUnref<SkImageFilter> imageSourceSrcRect(
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SkImageSource::Create(fImage, srcRect, srcRect, kHigh_SkFilterQuality));
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SkAutoTUnref<SkImageFilter> imageSourceSrcRectDstRect(
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SkImageSource::Create(fImage, srcRect, dstRect, kHigh_SkFilterQuality));
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SkAutoTUnref<SkImageFilter> imageSourceDstRectOnly(
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SkImageSource::Create(fImage, bounds, dstRect, kHigh_SkFilterQuality));
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// Draw an unscaled bitmap.
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FillRectFiltered(canvas, clipRect, imageSource);
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canvas->translate(SkIntToScalar(100), 0);
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// Draw an unscaled subset of the source bitmap (srcRect -> srcRect).
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FillRectFiltered(canvas, clipRect, imageSourceSrcRect);
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canvas->translate(SkIntToScalar(100), 0);
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// Draw a subset of the bitmap scaled to a destination rect (srcRect -> dstRect).
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FillRectFiltered(canvas, clipRect, imageSourceSrcRectDstRect);
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canvas->translate(SkIntToScalar(100), 0);
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// Draw the entire bitmap scaled to a destination rect (bounds -> dstRect).
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FillRectFiltered(canvas, clipRect, imageSourceDstRectOnly);
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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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SkAutoTUnref<SkImage> fImage;
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typedef GM INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new ImageSourceGM; )
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