blob: 84de781bec7d4d4c2d91ceac148a1264a3aa84d8 [file] [log] [blame]
/*
* 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/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFilterQuality.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkPaint.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/effects/SkImageFilters.h"
#include "tools/ToolUtils.h"
#include <utility>
// 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 {
fImage = ToolUtils::create_string_image(100, 100, 0xFFFFFFFF, 20, 70, 96, "e");
}
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());
const SkSamplingOptions sampling({1/3.0f, 1/3.0f});
{
// Draw an unscaled bitmap.
sk_sp<SkImageFilter> imageSource(SkImageFilters::Image(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(
SkImageFilters::Image(fImage, srcRect, srcRect, sampling));
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(
SkImageFilters::Image(fImage, srcRect, dstRect, sampling));
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(
SkImageFilters::Image(fImage, bounds, dstRect, sampling));
fill_rect_filtered(canvas, clipRect, std::move(imageSourceDstRectOnly));
canvas->translate(SkIntToScalar(100), 0);
}
}
private:
sk_sp<SkImage> fImage;
using INHERITED = GM;
};
///////////////////////////////////////////////////////////////////////////////
DEF_GM( return new ImageSourceGM; )