99 lines
3.4 KiB
C++
99 lines
3.4 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/gm.h"
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#include "include/core/SkBitmap.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkImage.h"
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#include "include/core/SkImageFilter.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/effects/SkImageFilters.h"
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#include "tools/ToolUtils.h"
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#include <utility>
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// This GM exercises the SkImageSource ImageFilter class.
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static void fill_rect_filtered(SkCanvas* canvas,
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const SkRect& clipRect,
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sk_sp<SkImageFilter> filter) {
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SkPaint paint;
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paint.setImageFilter(std::move(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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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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fImage = ToolUtils::create_string_image(100, 100, 0xFFFFFFFF, 20, 70, 96, "e");
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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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const SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30);
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const SkRect dstRect = SkRect::MakeXYWH(0, 10, 60, 60);
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const SkRect clipRect = SkRect::MakeXYWH(0, 0, 100, 100);
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const SkRect bounds = SkRect::MakeIWH(fImage->width(), fImage->height());
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const SkSamplingOptions sampling({1/3.0f, 1/3.0f});
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{
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// Draw an unscaled bitmap.
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sk_sp<SkImageFilter> imageSource(SkImageFilters::Image(fImage));
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fill_rect_filtered(canvas, clipRect, std::move(imageSource));
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canvas->translate(SkIntToScalar(100), 0);
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}
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{
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// Draw an unscaled subset of the source bitmap (srcRect -> srcRect).
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sk_sp<SkImageFilter> imageSourceSrcRect(
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SkImageFilters::Image(fImage, srcRect, srcRect, sampling));
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fill_rect_filtered(canvas, clipRect, std::move(imageSourceSrcRect));
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canvas->translate(SkIntToScalar(100), 0);
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}
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{
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// Draw a subset of the bitmap scaled to a destination rect (srcRect -> dstRect).
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sk_sp<SkImageFilter> imageSourceSrcRectDstRect(
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SkImageFilters::Image(fImage, srcRect, dstRect, sampling));
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fill_rect_filtered(canvas, clipRect, std::move(imageSourceSrcRectDstRect));
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canvas->translate(SkIntToScalar(100), 0);
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}
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{
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// Draw the entire bitmap scaled to a destination rect (bounds -> dstRect).
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sk_sp<SkImageFilter> imageSourceDstRectOnly(
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SkImageFilters::Image(fImage, bounds, dstRect, sampling));
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fill_rect_filtered(canvas, clipRect, std::move(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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sk_sp<SkImage> fImage;
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using INHERITED = GM;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new ImageSourceGM; )
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