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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 "sk_tool_utils.h"
#include "SkImage.h"
#include "SkImageSource.h"
// This GM exercises the SkImageSource ImageFilter class.
static void fill_rect_filtered(SkCanvas* canvas,
const SkRect& clipRect,
sk_sp<SkImageFilter> filter) {
SkPaint paint;
paint.setImageFilter(std::move(filter));
canvas->save();
canvas->clipRect(clipRect);
canvas->drawPaint(paint);
canvas->restore();
}
class ImageSourceGM : public skiagm::GM {
public:
ImageSourceGM() { }
protected:
SkString onShortName() override {
return SkString("imagesource");
}
SkISize onISize() override { return SkISize::Make(500, 150); }
void onOnceBeforeDraw() override {
SkBitmap bm = sk_tool_utils::create_string_bitmap(100, 100, 0xFFFFFFFF, 20, 70, 96, "e");
fImage = SkImage::MakeFromBitmap(bm);
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
const SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30);
const SkRect dstRect = SkRect::MakeXYWH(0, 10, 60, 60);
const SkRect clipRect = SkRect::MakeXYWH(0, 0, 100, 100);
const SkRect bounds = SkRect::MakeIWH(fImage->width(), fImage->height());
{
// Draw an unscaled bitmap.
sk_sp<SkImageFilter> imageSource(SkImageSource::Make(fImage));
fill_rect_filtered(canvas, clipRect, std::move(imageSource));
canvas->translate(SkIntToScalar(100), 0);
}
{
// Draw an unscaled subset of the source bitmap (srcRect -> srcRect).
sk_sp<SkImageFilter> imageSourceSrcRect(
SkImageSource::Make(fImage, srcRect, srcRect, kHigh_SkFilterQuality));
fill_rect_filtered(canvas, clipRect, std::move(imageSourceSrcRect));
canvas->translate(SkIntToScalar(100), 0);
}
{
// Draw a subset of the bitmap scaled to a destination rect (srcRect -> dstRect).
sk_sp<SkImageFilter> imageSourceSrcRectDstRect(
SkImageSource::Make(fImage, srcRect, dstRect, kHigh_SkFilterQuality));
fill_rect_filtered(canvas, clipRect, std::move(imageSourceSrcRectDstRect));
canvas->translate(SkIntToScalar(100), 0);
}
{
// Draw the entire bitmap scaled to a destination rect (bounds -> dstRect).
sk_sp<SkImageFilter> imageSourceDstRectOnly(
SkImageSource::Make(fImage, bounds, dstRect, kHigh_SkFilterQuality));
fill_rect_filtered(canvas, clipRect, std::move(imageSourceDstRectOnly));
canvas->translate(SkIntToScalar(100), 0);
}
}
private:
sk_sp<SkImage> fImage;
typedef GM INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
DEF_GM( return new ImageSourceGM; )
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