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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.
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);
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);
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.setLCDRenderText(true); // want LCD
paint.setAntiAlias(true); // need AA for LCD
sk_tool_utils::set_portable_typeface(&paint);
paint.setColor(0xFFFFFFFF);
// this has to be small enough that it doesn't become a path
paint.setTextSize(SkIntToScalar(36));
const char* str = "e";
canvas->drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), 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();
}
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(SkPictureImageFilter::MakeForLocalSpace(
fPicture,
fPicture->cullRect(),
kLow_SkFilterQuality));
sk_sp<SkImageFilter> pictureSourcePixelated(SkPictureImageFilter::MakeForLocalSpace(
fPicture,
fPicture->cullRect(),
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(SkPictureImageFilter::MakeForLocalSpace(
fLCDPicture,
fPicture->cullRect(),
kNone_SkFilterQuality));
canvas->scale(4, 4);
canvas->translate(-0.9f*srcRect.fLeft, -2.45f*srcRect.fTop);
canvas->saveLayerPreserveLCDTextRequests(&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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