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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkPictureImageFilter.h"
#include "SkPictureRecorder.h"
// This GM exercises the SkPictureImageFilter ImageFilter class.
class PictureImageFilterGM : public skiagm::GM {
public:
PictureImageFilterGM() {
}
protected:
SkString onShortName() override {
return SkString("pictureimagefilter");
}
void makePicture() {
SkPictureRecorder recorder;
SkCanvas* canvas = recorder.beginRecording(100, 100, nullptr, 0);
canvas->clear(SK_ColorBLACK);
SkPaint paint;
paint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&paint);
paint.setColor(0xFFFFFFFF);
paint.setTextSize(SkIntToScalar(96));
const char* str = "e";
canvas->drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint);
fPicture.reset(recorder.endRecording());
}
SkISize onISize() override { return SkISize::Make(600, 300); }
void onOnceBeforeDraw() override {
this->makePicture();
}
static void fillRectFiltered(SkCanvas* canvas, const SkRect& clipRect, SkImageFilter* filter) {
SkPaint paint;
paint.setImageFilter(filter);
canvas->save();
canvas->clipRect(clipRect);
canvas->drawPaint(paint);
canvas->restore();
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
{
SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30);
SkRect emptyRect = SkRect::MakeXYWH(20, 20, 0, 0);
SkRect bounds = SkRect::MakeXYWH(0, 0, 100, 100);
SkAutoTUnref<SkImageFilter> pictureSource(
SkPictureImageFilter::Create(fPicture));
SkAutoTUnref<SkImageFilter> pictureSourceSrcRect(
SkPictureImageFilter::Create(fPicture, srcRect));
SkAutoTUnref<SkImageFilter> pictureSourceEmptyRect(
SkPictureImageFilter::Create(fPicture, emptyRect));
SkAutoTUnref<SkImageFilter> pictureSourceResampled(
SkPictureImageFilter::CreateForLocalSpace(fPicture, fPicture->cullRect(),
kLow_SkFilterQuality));
SkAutoTUnref<SkImageFilter> pictureSourcePixelated(
SkPictureImageFilter::CreateForLocalSpace(fPicture, fPicture->cullRect(),
kNone_SkFilterQuality));
canvas->save();
// Draw the picture unscaled.
fillRectFiltered(canvas, bounds, pictureSource);
canvas->translate(SkIntToScalar(100), 0);
// Draw an unscaled subset of the source picture.
fillRectFiltered(canvas, bounds, pictureSourceSrcRect);
canvas->translate(SkIntToScalar(100), 0);
// Draw the picture to an empty rect (should draw nothing).
fillRectFiltered(canvas, bounds, pictureSourceEmptyRect);
canvas->translate(SkIntToScalar(100), 0);
canvas->restore();
// Draw the picture scaled
canvas->translate(0, SkIntToScalar(100));
canvas->scale(200 / srcRect.width(), 200 / srcRect.height());
canvas->translate(-srcRect.fLeft, -srcRect.fTop);
fillRectFiltered(canvas, srcRect, pictureSource);
// Draw the picture scaled, but rasterized at original resolution
canvas->translate(srcRect.width(), 0);
fillRectFiltered(canvas, srcRect, pictureSourceResampled);
// Draw the picture scaled, pixelated
canvas->translate(srcRect.width(), 0);
fillRectFiltered(canvas, srcRect, pictureSourcePixelated);
}
}
private:
SkAutoTUnref<SkPicture> fPicture;
typedef GM INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
DEF_GM( return new PictureImageFilterGM; )
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