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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 "sk_tool_utils.h"
#include "SkImage.h"
#include "SkImageSource.h"
#include "SkOffsetImageFilter.h"
#include "SkSurface.h"
#include "gm.h"
#define WIDTH 600
#define HEIGHT 100
#define MARGIN 12
class OffsetImageFilterGM : public skiagm::GM {
public:
OffsetImageFilterGM() {
this->setBGColor(0xFF000000);
}
protected:
SkString onShortName() override {
return SkString("offsetimagefilter");
}
SkISize onISize() override {
return SkISize::Make(WIDTH, HEIGHT);
}
void onOnceBeforeDraw() override {
fBitmap = SkImage::MakeFromBitmap(
sk_tool_utils::create_string_bitmap(80, 80, 0xD000D000, 15, 65, 96, "e"));
fCheckerboard = SkImage::MakeFromBitmap(
sk_tool_utils::create_checkerboard_bitmap(80, 80,
sk_tool_utils::color_to_565(0xFFA0A0A0),
sk_tool_utils::color_to_565(0xFF404040),
8));
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
SkPaint paint;
for (int i = 0; i < 4; i++) {
sk_sp<SkImage> image = (i & 0x01) ? fCheckerboard : fBitmap;
SkIRect cropRect = SkIRect::MakeXYWH(i * 12,
i * 8,
image->width() - i * 8,
image->height() - i * 12);
SkImageFilter::CropRect rect(SkRect::Make(cropRect));
sk_sp<SkImageFilter> tileInput(SkImageSource::Make(image));
SkScalar dx = SkIntToScalar(i*5);
SkScalar dy = SkIntToScalar(i*10);
paint.setImageFilter(SkOffsetImageFilter::Make(dx, dy, std::move(tileInput), &rect));
DrawClippedImage(canvas, image.get(), paint, 1, cropRect);
canvas->translate(SkIntToScalar(image->width() + MARGIN), 0);
}
SkIRect cropRect = SkIRect::MakeXYWH(0, 0, 100, 100);
SkImageFilter::CropRect rect(SkRect::Make(cropRect));
paint.setImageFilter(SkOffsetImageFilter::Make(-5, -10, nullptr, &rect));
DrawClippedImage(canvas, fBitmap.get(), paint, 2, cropRect);
}
private:
static void DrawClippedImage(SkCanvas* canvas, const SkImage* image, const SkPaint& paint,
SkScalar scale, const SkIRect& cropRect) {
SkRect clipRect = SkRect::MakeIWH(image->width(), image->height());
canvas->save();
canvas->clipRect(clipRect);
canvas->scale(scale, scale);
canvas->drawImage(image, 0, 0, &paint);
canvas->restore();
// Draw a boundary rect around the intersection of the clip rect and crop rect.
SkRect cropRectFloat;
SkMatrix::MakeScale(scale, scale).mapRect(&cropRectFloat, SkRect::Make(cropRect));
if (clipRect.intersect(cropRectFloat)) {
SkPaint strokePaint;
strokePaint.setStyle(SkPaint::kStroke_Style);
strokePaint.setStrokeWidth(2);
strokePaint.setColor(SK_ColorRED);
canvas->drawRect(clipRect, strokePaint);
}
}
sk_sp<SkImage> fBitmap, fCheckerboard;
typedef skiagm::GM INHERITED;
};
DEF_GM( return new OffsetImageFilterGM; )
//////////////////////////////////////////////////////////////////////////////
class SimpleOffsetImageFilterGM : public skiagm::GM {
public:
SimpleOffsetImageFilterGM() {}
protected:
SkString onShortName() override {
return SkString("simple-offsetimagefilter");
}
SkISize onISize() override { return SkISize::Make(640, 200); }
void doDraw(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imgf,
const SkRect* clipR = nullptr) {
SkPaint p;
if (clipR) {
p.setColor(0xFF00FF00);
p.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(clipR->makeInset(SK_ScalarHalf, SK_ScalarHalf), p);
p.setStyle(SkPaint::kFill_Style);
}
if (imgf && imgf->cropRectIsSet()) {
SkImageFilter::CropRect cr = imgf->getCropRect();
p.setColor(0x66FF00FF);
p.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(cr.rect().makeInset(SK_ScalarHalf, SK_ScalarHalf), p);
p.setStyle(SkPaint::kFill_Style);
}
p.setColor(0x660000FF);
canvas->drawRect(r, p);
if (clipR) {
canvas->save();
canvas->clipRect(*clipR);
}
if (imgf) {
p.setImageFilter(std::move(imgf));
}
p.setColor(0x66FF0000);
canvas->drawRect(r, p);
if (clipR) {
canvas->restore();
}
}
void onDraw(SkCanvas* canvas) override {
const SkRect r = SkRect::MakeWH(40, 40);
SkImageFilter::CropRect cr0(r);
SkImageFilter::CropRect cr1(SkRect::MakeWH(20, 20));
const SkRect r2 = SkRect::MakeXYWH(40, 0, 40, 40);
SkImageFilter::CropRect cr2(r2);
canvas->translate(40, 40);
canvas->save();
this->doDraw(canvas, r, nullptr);
canvas->translate(100, 0);
this->doDraw(canvas, r, SkOffsetImageFilter::Make(20, 20, nullptr));
canvas->translate(100, 0);
this->doDraw(canvas, r, SkOffsetImageFilter::Make(20, 20, nullptr, &cr0));
canvas->translate(100, 0);
this->doDraw(canvas, r, SkOffsetImageFilter::Make(20, 20, nullptr), &r);
canvas->translate(100, 0);
this->doDraw(canvas, r, SkOffsetImageFilter::Make(20, 20, nullptr, &cr1));
SkRect clipR = SkRect::MakeXYWH(40, 40, 40, 40);
canvas->translate(100, 0);
this->doDraw(canvas, r, SkOffsetImageFilter::Make(20, 20, nullptr, nullptr), &clipR);
canvas->restore();
// 2nd row
canvas->translate(0, 80);
/*
* combos of clip and crop rects that align with src and dst
*/
// crop==clip==src
this->doDraw(canvas, r, SkOffsetImageFilter::Make(40, 0, nullptr, &cr0), &r);
// crop==src, clip==dst
canvas->translate(100, 0);
this->doDraw(canvas, r, SkOffsetImageFilter::Make(40, 0, nullptr, &cr0), &r2);
// crop==dst, clip==src
canvas->translate(100, 0);
this->doDraw(canvas, r, SkOffsetImageFilter::Make(40, 0, nullptr, &cr2), &r);
// crop==clip==dst
canvas->translate(100, 0);
this->doDraw(canvas, r, SkOffsetImageFilter::Make(40, 0, nullptr, &cr2), &r2);
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new SimpleOffsetImageFilterGM; )
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