blob: ad5bca127a2fc0949453d481ef4d895ddc76f4ca [file] [log] [blame]
/*
* Copyright 2015 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/SkImage.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSurface.h"
#include "include/effects/SkImageFilters.h"
#include "tools/ToolUtils.h"
#include <utility>
static sk_sp<SkImage> make_image(SkCanvas* rootCanvas) {
SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
auto surface(ToolUtils::makeSurface(rootCanvas, info));
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(SK_ColorRED);
surface->getCanvas()->drawCircle(50, 50, 50, paint);
return surface->makeImageSnapshot();
}
static void show_image(SkCanvas* canvas, SkImage* image, sk_sp<SkImageFilter> filter) {
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
SkRect r = SkRect::MakeIWH(image->width(), image->height()).makeOutset(SK_ScalarHalf,
SK_ScalarHalf);
canvas->drawRect(r, paint);
paint.setStyle(SkPaint::kFill_Style);
paint.setImageFilter(filter);
canvas->drawImage(image, 0, 0, SkSamplingOptions(), &paint);
}
typedef sk_sp<SkImageFilter> (*ImageFilterFactory)();
// Show the effect of localmatriximagefilter with various matrices, on various filters
DEF_SIMPLE_GM(localmatriximagefilter, canvas, 640, 640) {
sk_sp<SkImage> image0(make_image(canvas));
const ImageFilterFactory factories[] = {
[]{ return SkImageFilters::Blur(8, 8, nullptr); },
[]{ return SkImageFilters::Dilate(8, 8, nullptr); },
[]{ return SkImageFilters::Erode(8, 8, nullptr); },
[]{ return SkImageFilters::Offset(8, 8, nullptr); },
};
const SkMatrix matrices[] = {
SkMatrix::Scale(SK_ScalarHalf, SK_ScalarHalf),
SkMatrix::Scale(2, 2),
SkMatrix::Translate(10, 10)
};
const SkScalar spacer = image0->width() * 3.0f / 2;
canvas->translate(40, 40);
for (auto&& factory : factories) {
sk_sp<SkImageFilter> filter(factory());
canvas->save();
show_image(canvas, image0.get(), filter);
for (const auto& matrix : matrices) {
sk_sp<SkImageFilter> localFilter(filter->makeWithLocalMatrix(matrix));
canvas->translate(spacer, 0);
show_image(canvas, image0.get(), std::move(localFilter));
}
canvas->restore();
canvas->translate(0, spacer);
}
}