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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/gm.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkColorSpace.h"
- #include "include/core/SkFilterQuality.h"
- #include "include/core/SkFont.h"
- #include "include/core/SkImage.h"
- #include "include/core/SkImageFilter.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPicture.h"
- #include "include/core/SkPictureRecorder.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkTypeface.h"
- #include "include/effects/SkImageSource.h"
- #include "include/effects/SkPictureImageFilter.h"
- #include "tools/ToolUtils.h"
- // This GM exercises the SkPictureImageFilter ImageFilter class.
- static void fill_rect_filtered(SkCanvas* canvas,
- const SkRect& clipRect,
- sk_sp<SkImageFilter> filter) {
- SkPaint paint;
- paint.setImageFilter(filter);
- canvas->save();
- canvas->clipRect(clipRect);
- canvas->drawPaint(paint);
- canvas->restore();
- }
- static sk_sp<SkPicture> make_picture() {
- SkPictureRecorder recorder;
- SkCanvas* canvas = recorder.beginRecording(100, 100, nullptr, 0);
- SkPaint paint;
- paint.setColor(0xFFFFFFFF);
- SkFont font(ToolUtils::create_portable_typeface(), 96.0f);
- canvas->drawString("e", 20.0f, 70.0f, font, paint);
- return recorder.finishRecordingAsPicture();
- }
- // Create a picture that will draw LCD text
- static sk_sp<SkPicture> make_LCD_picture() {
- SkPictureRecorder recorder;
- SkCanvas* canvas = recorder.beginRecording(100, 100, nullptr, 0);
- canvas->clear(SK_ColorTRANSPARENT);
- SkPaint paint;
- paint.setColor(0xFFFFFFFF);
- // this has to be small enough that it doesn't become a path
- SkFont font(ToolUtils::create_portable_typeface(), 36.0f);
- font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
- canvas->drawString("e", 20.0f, 70.0f, font, paint);
- return recorder.finishRecordingAsPicture();
- }
- class PictureImageFilterGM : public skiagm::GM {
- public:
- PictureImageFilterGM() { }
- protected:
- SkString onShortName() override {
- return SkString("pictureimagefilter");
- }
- SkISize onISize() override { return SkISize::Make(600, 300); }
- void onOnceBeforeDraw() override {
- fPicture = make_picture();
- fLCDPicture = make_LCD_picture();
- }
- sk_sp<SkImageFilter> make(sk_sp<SkPicture> pic, SkRect r, SkFilterQuality fq) {
- SkISize dim = { SkScalarRoundToInt(r.width()), SkScalarRoundToInt(r.height()) };
- auto img = SkImage::MakeFromPicture(pic, dim, nullptr, nullptr,
- SkImage::BitDepth::kU8, SkColorSpace::MakeSRGB());
- return SkImageSource::Make(img, r, r, fq);
- }
- sk_sp<SkImageFilter> make(SkFilterQuality fq) {
- return make(fPicture, fPicture->cullRect(), fq);
- }
- void onDraw(SkCanvas* canvas) override {
- canvas->clear(SK_ColorGRAY);
- {
- SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30);
- SkRect emptyRect = SkRect::MakeXYWH(20, 20, 0, 0);
- SkRect bounds = SkRect::MakeXYWH(0, 0, 100, 100);
- sk_sp<SkImageFilter> pictureSource(SkPictureImageFilter::Make(fPicture));
- sk_sp<SkImageFilter> pictureSourceSrcRect(SkPictureImageFilter::Make(fPicture,
- srcRect));
- sk_sp<SkImageFilter> pictureSourceEmptyRect(SkPictureImageFilter::Make(fPicture,
- emptyRect));
- sk_sp<SkImageFilter> pictureSourceResampled = make(kLow_SkFilterQuality);
- sk_sp<SkImageFilter> pictureSourcePixelated = make(kNone_SkFilterQuality);
- canvas->save();
- // Draw the picture unscaled.
- fill_rect_filtered(canvas, bounds, pictureSource);
- canvas->translate(SkIntToScalar(100), 0);
- // Draw an unscaled subset of the source picture.
- fill_rect_filtered(canvas, bounds, pictureSourceSrcRect);
- canvas->translate(SkIntToScalar(100), 0);
- // Draw the picture to an empty rect (should draw nothing).
- fill_rect_filtered(canvas, bounds, pictureSourceEmptyRect);
- canvas->translate(SkIntToScalar(100), 0);
- // Draw the LCD picture to a layer
- {
- SkPaint stroke;
- stroke.setStyle(SkPaint::kStroke_Style);
- canvas->drawRect(bounds, stroke);
- SkPaint paint;
- paint.setImageFilter(make(fLCDPicture, fPicture->cullRect(), kNone_SkFilterQuality));
- canvas->scale(4, 4);
- canvas->translate(-0.9f*srcRect.fLeft, -2.45f*srcRect.fTop);
- canvas->saveLayer(&bounds, &paint);
- canvas->restore();
- }
- 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);
- fill_rect_filtered(canvas, srcRect, pictureSource);
- // Draw the picture scaled, but rasterized at original resolution
- canvas->translate(srcRect.width(), 0);
- fill_rect_filtered(canvas, srcRect, pictureSourceResampled);
- // Draw the picture scaled, pixelated
- canvas->translate(srcRect.width(), 0);
- fill_rect_filtered(canvas, srcRect, pictureSourcePixelated);
- }
- }
- private:
- sk_sp<SkPicture> fPicture;
- sk_sp<SkPicture> fLCDPicture;
- typedef GM INHERITED;
- };
- ///////////////////////////////////////////////////////////////////////////////
- DEF_GM( return new PictureImageFilterGM; )
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