b286bc2da8
Idea: transition callers to this, so we can later typedef SkColorFilter and SkShader to the same thing. Bug: skia:8937 Change-Id: I000c882e11622091aa44c141aa6ddd1216414f46 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/206685 Reviewed-by: Mike Klein <mtklein@google.com> Commit-Queue: Mike Reed <reed@google.com>
102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkBlurImageFilter.h"
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#include "SkCanvas.h"
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#include "SkColorFilter.h"
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#include "SkColorFilterImageFilter.h"
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#include "SkDropShadowImageFilter.h"
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#include "SkSurface.h"
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#include "ToolUtils.h"
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#include "gm.h"
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///////////////////////////////////////////////////////////////////////////////
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static void show_bounds(SkCanvas* canvas, const SkIRect& subset, const SkIRect& clip) {
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SkIRect rects[] { subset, clip };
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SkColor colors[] { SK_ColorRED, SK_ColorBLUE };
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SkPaint paint;
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paint.setStyle(SkPaint::kStroke_Style);
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for (size_t i = 0; i < SK_ARRAY_COUNT(rects); ++i) {
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paint.setColor(colors[i]);
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canvas->drawRect(SkRect::Make(rects[i]), paint);
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}
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}
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// In this GM, we're going to feed the inner portion of a 100x100 checkboard
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// (i.e., strip off a 25-wide border) through the makeWithFilter method.
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// We'll then draw the appropriate subset of the result to the screen at the
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// given offset.
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class ImageMakeWithFilterGM : public skiagm::GM {
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public:
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ImageMakeWithFilterGM () {}
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protected:
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SkString onShortName() override {
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return SkString("imagemakewithfilter");
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}
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SkISize onISize() override { return SkISize::Make(440, 530); }
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void onDraw(SkCanvas* canvas) override {
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auto cf = SkColorFilters::Blend(SK_ColorGREEN, SkBlendMode::kSrc);
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sk_sp<SkImageFilter> filters[] = {
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SkColorFilterImageFilter::Make(std::move(cf), nullptr),
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SkBlurImageFilter::Make(2.0f, 2.0f, nullptr),
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SkDropShadowImageFilter::Make(
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10.0f, 5.0f, 3.0f, 3.0f, SK_ColorBLUE,
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SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode,
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nullptr),
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};
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SkIRect clipBounds[] {
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{ -20, -20, 100, 100 },
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{ 0, 0, 75, 75 },
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{ 20, 20, 100, 100 },
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{ -20, -20, 50, 50 },
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{ 20, 20, 50, 50 },
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};
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SkImageInfo info = SkImageInfo::MakeN32(100, 100, kPremul_SkAlphaType);
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SkScalar MARGIN = SkIntToScalar(40);
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SkScalar DX = info.width() + MARGIN;
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SkScalar DY = info.height() + MARGIN;
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canvas->translate(MARGIN, MARGIN);
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sk_sp<SkSurface> surface = ToolUtils::makeSurface(canvas, info);
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ToolUtils::draw_checkerboard(surface->getCanvas());
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sk_sp<SkImage> source = surface->makeImageSnapshot();
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for (auto clipBound : clipBounds) {
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canvas->save();
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for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
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SkIRect subset = SkIRect::MakeXYWH(25, 25, 50, 50);
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SkIRect outSubset;
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SkIPoint offset;
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sk_sp<SkImage> result = source->makeWithFilter(filters[i].get(), subset, clipBound,
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&outSubset, &offset);
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SkASSERT(result);
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SkASSERT(source->isTextureBacked() == result->isTextureBacked());
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result = result->makeSubset(outSubset);
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canvas->drawImage(result.get(), SkIntToScalar(offset.fX), SkIntToScalar(offset.fY));
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show_bounds(canvas, SkIRect::MakeXYWH(offset.x(), offset.y(), outSubset.width(),
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outSubset.height()), clipBound);
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canvas->translate(DX, 0);
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}
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canvas->restore();
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canvas->translate(0, DY);
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}
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}
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private:
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typedef GM INHERITED;
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};
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DEF_GM( return new ImageMakeWithFilterGM; )
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