2015-04-20 14:27:15 +00:00
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/*
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* Copyright 2015 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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2019-04-23 17:05:21 +00:00
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#include "gm/gm.h"
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2019-05-01 21:28:53 +00:00
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#include "include/core/SkBlendMode.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkColorFilter.h"
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#include "include/core/SkFilterQuality.h"
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2019-04-23 17:05:21 +00:00
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#include "include/core/SkImage.h"
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#include "include/core/SkImageFilter.h"
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2019-05-01 21:28:53 +00:00
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#include "include/core/SkImageInfo.h"
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2020-03-02 21:27:03 +00:00
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#include "include/core/SkMaskFilter.h"
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2019-05-01 21:28:53 +00:00
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkRRect.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkScalar.h"
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2019-04-23 17:05:21 +00:00
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#include "include/core/SkSurface.h"
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2019-05-01 21:28:53 +00:00
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#include "include/core/SkTypes.h"
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#include "include/effects/SkColorMatrix.h"
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2020-03-02 21:27:03 +00:00
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#include "include/effects/SkGradientShader.h"
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#include "include/effects/SkHighContrastFilter.h"
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2019-08-02 19:21:23 +00:00
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#include "include/effects/SkImageFilters.h"
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2020-03-02 21:27:03 +00:00
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#include "include/effects/SkShaderMaskFilter.h"
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2020-07-16 14:58:58 +00:00
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#include "include/gpu/GrDirectContext.h"
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2019-05-01 21:28:53 +00:00
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#include "tools/Resources.h"
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2019-04-23 17:05:21 +00:00
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#include "tools/ToolUtils.h"
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2015-04-20 14:27:15 +00:00
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2019-05-01 21:28:53 +00:00
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#include <utility>
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2015-04-20 14:27:15 +00:00
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/**
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* Test drawing a primitive w/ an imagefilter (in this case, just matrix w/ identity) to see
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* that we apply the xfermode *after* the image has been created and filtered, and not during
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* the creation step (i.e. before it is filtered).
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*
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2015-11-07 13:29:00 +00:00
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* see https://bug.skia.org/3741
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2015-04-20 14:27:15 +00:00
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*/
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2016-10-06 00:33:02 +00:00
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static void do_draw(SkCanvas* canvas, SkBlendMode mode, sk_sp<SkImageFilter> imf) {
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2015-04-20 16:10:31 +00:00
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SkAutoCanvasRestore acr(canvas, true);
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canvas->clipRect(SkRect::MakeWH(220, 220));
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2015-12-10 20:08:44 +00:00
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2015-04-20 16:10:31 +00:00
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// want to force a layer, so modes like DstIn can combine meaningfully, but the final
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// image can still be shown against our default (opaque) background. non-opaque GMs
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// are a lot more trouble to compare/triage.
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2015-08-27 14:41:13 +00:00
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canvas->saveLayer(nullptr, nullptr);
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2015-04-20 16:10:31 +00:00
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canvas->drawColor(SK_ColorGREEN);
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2015-04-20 14:27:15 +00:00
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SkPaint paint;
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paint.setAntiAlias(true);
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2015-12-10 20:08:44 +00:00
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2015-04-20 14:27:15 +00:00
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SkRect r0 = SkRect::MakeXYWH(10, 60, 200, 100);
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SkRect r1 = SkRect::MakeXYWH(60, 10, 100, 200);
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2015-12-10 20:08:44 +00:00
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2015-04-20 14:27:15 +00:00
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paint.setColor(SK_ColorRED);
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canvas->drawOval(r0, paint);
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2015-04-20 16:10:31 +00:00
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paint.setColor(0x660000FF);
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2016-04-05 22:09:00 +00:00
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paint.setImageFilter(std::move(imf));
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2016-10-06 00:33:02 +00:00
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paint.setBlendMode(mode);
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2015-04-20 14:27:15 +00:00
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canvas->drawOval(r1, paint);
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2015-09-09 15:16:41 +00:00
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}
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2015-04-20 14:27:15 +00:00
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2015-09-09 15:16:41 +00:00
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DEF_SIMPLE_GM(imagefilters_xfermodes, canvas, 480, 480) {
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2015-04-20 16:10:31 +00:00
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canvas->translate(10, 10);
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2015-04-20 14:27:15 +00:00
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// just need an imagefilter to trigger the code-path (which creates a tmp layer)
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2019-08-02 19:21:23 +00:00
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sk_sp<SkImageFilter> imf(SkImageFilters::MatrixTransform(SkMatrix::I(),
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2016-04-05 22:09:00 +00:00
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kNone_SkFilterQuality,
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nullptr));
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2015-04-20 14:27:15 +00:00
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2016-10-06 00:33:02 +00:00
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const SkBlendMode modes[] = {
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SkBlendMode::kSrcATop, SkBlendMode::kDstIn
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2015-04-20 14:27:15 +00:00
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};
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2015-12-10 20:08:44 +00:00
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2015-04-20 14:27:15 +00:00
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for (size_t i = 0; i < SK_ARRAY_COUNT(modes); ++i) {
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canvas->save();
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2015-09-09 15:16:41 +00:00
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do_draw(canvas, modes[i], nullptr);
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2015-04-20 16:10:31 +00:00
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canvas->translate(240, 0);
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2015-09-09 15:16:41 +00:00
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do_draw(canvas, modes[i], imf);
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2015-04-20 14:27:15 +00:00
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canvas->restore();
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2015-12-10 20:08:44 +00:00
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2015-04-20 16:10:31 +00:00
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canvas->translate(0, 240);
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2015-04-20 14:27:15 +00:00
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}
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2015-09-09 15:16:41 +00:00
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}
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2015-12-07 17:28:34 +00:00
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2016-03-17 17:51:11 +00:00
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static sk_sp<SkImage> make_image(SkCanvas* canvas) {
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2016-12-29 16:50:48 +00:00
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const SkImageInfo info = SkImageInfo::MakeS32(100, 100, kPremul_SkAlphaType);
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2019-03-20 16:12:10 +00:00
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auto surface(ToolUtils::makeSurface(canvas, info));
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2015-12-07 17:28:34 +00:00
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surface->getCanvas()->drawRect(SkRect::MakeXYWH(25, 25, 50, 50), SkPaint());
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2016-03-17 17:51:11 +00:00
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return surface->makeImageSnapshot();
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2015-12-07 17:28:34 +00:00
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}
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// Compare blurs when we're tightly clipped (fast) and not as tightly (slower)
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//
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// Expect the two to draw the same (modulo the extra border of pixels when the clip is larger)
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//
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DEF_SIMPLE_GM(fast_slow_blurimagefilter, canvas, 620, 260) {
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2016-03-17 17:51:11 +00:00
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sk_sp<SkImage> image(make_image(canvas));
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2015-12-07 17:28:34 +00:00
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const SkRect r = SkRect::MakeIWH(image->width(), image->height());
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canvas->translate(10, 10);
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for (SkScalar sigma = 8; sigma <= 128; sigma *= 2) {
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SkPaint paint;
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2019-08-02 19:21:23 +00:00
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paint.setImageFilter(SkImageFilters::Blur(sigma, sigma, nullptr));
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2015-12-07 17:28:34 +00:00
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canvas->save();
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// we outset the clip by 1, to fall out of the fast-case in drawImage
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// i.e. the clip is larger than the image
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for (SkScalar outset = 0; outset <= 1; ++outset) {
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canvas->save();
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canvas->clipRect(r.makeOutset(outset, outset));
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2021-01-24 02:14:47 +00:00
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canvas->drawImage(image, 0, 0, SkSamplingOptions(), &paint);
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2015-12-07 17:28:34 +00:00
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canvas->restore();
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canvas->translate(0, r.height() + 20);
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}
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canvas->restore();
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canvas->translate(r.width() + 20, 0);
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}
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}
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2016-01-07 19:28:08 +00:00
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///////////////////////////////////////////////////////////////////////////////////////////////////
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2016-04-08 15:01:20 +00:00
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static void draw_set(SkCanvas* canvas, sk_sp<SkImageFilter> filters[], int count) {
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2016-01-07 19:28:08 +00:00
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const SkRect r = SkRect::MakeXYWH(30, 30, 200, 200);
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const SkScalar offset = 250;
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SkScalar dx = 0, dy = 0;
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for (int i = 0; i < count; ++i) {
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canvas->save();
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SkRRect rr = SkRRect::MakeRectXY(r.makeOffset(dx, dy), 20, 20);
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2016-09-21 18:15:07 +00:00
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canvas->clipRRect(rr, true);
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2020-05-30 20:02:14 +00:00
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canvas->saveLayer(SkCanvas::SaveLayerRec(&rr.getBounds(), nullptr, filters[i].get(), 0));
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2016-01-07 19:28:08 +00:00
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canvas->drawColor(0x40FFFFFF);
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canvas->restore();
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canvas->restore();
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if (0 == dx) {
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dx = offset;
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} else {
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dx = 0;
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dy = offset;
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}
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}
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}
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2019-08-14 00:34:19 +00:00
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class SaveLayerWithBackdropGM : public skiagm::GM {
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protected:
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bool runAsBench() const override { return true; }
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SkString onShortName() override { return SkString("savelayer_with_backdrop"); }
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SkISize onISize() override { return SkISize::Make(830, 550); }
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void onDraw(SkCanvas* canvas) override {
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SkColorMatrix cm;
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cm.setSaturation(10);
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sk_sp<SkColorFilter> cf(SkColorFilters::Matrix(cm));
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const SkScalar kernel[] = { 4, 0, 4, 0, -15, 0, 4, 0, 4 };
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sk_sp<SkImageFilter> filters[] = {
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SkImageFilters::Blur(10, 10, nullptr),
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SkImageFilters::Dilate(8, 8, nullptr),
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SkImageFilters::MatrixConvolution({ 3, 3 }, kernel, 1, 0, { 0, 0 },
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SkTileMode::kDecal, true, nullptr),
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SkImageFilters::ColorFilter(std::move(cf), nullptr),
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};
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const struct {
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SkScalar fSx, fSy, fTx, fTy;
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} xforms[] = {
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{ 1, 1, 0, 0 },
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{ 0.5f, 0.5f, 530, 0 },
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{ 0.25f, 0.25f, 530, 275 },
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{ 0.125f, 0.125f, 530, 420 },
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};
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2021-01-24 02:14:47 +00:00
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SkSamplingOptions sampling(SkFilterMode::kLinear,
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SkMipmapMode::kLinear);
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2019-08-14 00:34:19 +00:00
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sk_sp<SkImage> image(GetResourceAsImage("images/mandrill_512.png"));
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canvas->translate(20, 20);
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for (const auto& xform : xforms) {
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canvas->save();
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canvas->translate(xform.fTx, xform.fTy);
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canvas->scale(xform.fSx, xform.fSy);
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2021-01-24 02:14:47 +00:00
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canvas->drawImage(image, 0, 0, sampling, nullptr);
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2019-08-14 00:34:19 +00:00
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draw_set(canvas, filters, SK_ARRAY_COUNT(filters));
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canvas->restore();
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}
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2016-01-07 19:28:08 +00:00
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}
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2019-08-14 00:34:19 +00:00
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};
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DEF_GM(return new SaveLayerWithBackdropGM();)
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2020-03-02 21:27:03 +00:00
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Test that color filters and mask filters are applied before the image filter, even if it would
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// normally be a sprite draw that could avoid an auto-saveLayer.
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DEF_SIMPLE_GM(imagefilters_effect_order, canvas, 512, 512) {
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sk_sp<SkImage> image(GetResourceAsImage("images/mandrill_256.png"));
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2020-07-16 14:58:58 +00:00
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auto direct = GrAsDirectContext(canvas->recordingContext());
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if (direct) {
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if (sk_sp<SkImage> gpuImage = image->makeTextureImage(direct)) {
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2020-03-03 14:49:35 +00:00
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image = std::move(gpuImage);
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}
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2020-03-02 21:27:03 +00:00
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}
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SkISize kernelSize = SkISize::Make(3, 3);
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SkIPoint kernelOffset = SkIPoint::Make(1, 1);
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// A Laplacian edge detector, ie https://en.wikipedia.org/wiki/Kernel_(image_processing)
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SkScalar kernel[9] = {-1.f, -1.f, -1.f,
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-1.f, 8.f, -1.f,
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-1.f, -1.f, -1.f};
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auto edgeDetector = SkImageFilters::MatrixConvolution(
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kernelSize, kernel, 1.f, 0.f, kernelOffset, SkTileMode::kClamp, false, nullptr);
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// This uses the high contrast filter because it resembles a pre-processing step you may perform
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// prior to edge detection. The specifics of the high contrast algorithm don't matter for the GM
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auto edgeAmplify = SkHighContrastFilter::Make(
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{false, SkHighContrastConfig::InvertStyle::kNoInvert, 0.5f});
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SkPaint testCFPaint;
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testCFPaint.setColorFilter(edgeAmplify);
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testCFPaint.setImageFilter(edgeDetector);
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// The expected result is color filter then image filter, so represent this explicitly in the
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// image filter graph.
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SkPaint expectedCFPaint;
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expectedCFPaint.setImageFilter(SkImageFilters::Compose(edgeDetector,
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SkImageFilters::ColorFilter(edgeAmplify, nullptr)));
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// Draw the image twice (expected on the left, test on the right that should match)
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SkRect crop = SkRect::Make(image->bounds());
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canvas->save();
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canvas->clipRect(crop);
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2021-01-24 02:14:47 +00:00
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canvas->drawImage(image, 0, 0, SkSamplingOptions(), &expectedCFPaint); // Filter applied by draw's SkPaint
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2020-03-02 21:27:03 +00:00
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canvas->restore();
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canvas->save();
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canvas->translate(image->width(), 0);
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canvas->clipRect(crop);
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2021-01-24 02:14:47 +00:00
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canvas->drawImage(image, 0, 0, SkSamplingOptions(), &testCFPaint);
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2020-03-02 21:27:03 +00:00
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canvas->restore();
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// Now test mask filters. These should be run before the image filter, and thus have the same
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// effect as multiplying by an alpha mask.
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// This mask filter pokes a hole in the center of the image
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static constexpr SkColor kAlphas[] = { SK_ColorBLACK, SK_ColorTRANSPARENT };
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static constexpr SkScalar kPos[] = { 0.4f, 0.9f };
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sk_sp<SkShader> alphaMaskShader = SkGradientShader::MakeRadial(
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{128.f, 128.f}, 128.f, kAlphas, kPos, 2, SkTileMode::kClamp);
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sk_sp<SkMaskFilter> maskFilter = SkShaderMaskFilter::Make(alphaMaskShader);
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// If edge detector sees the mask filter, it'll have alpha and then blend with the original
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// image; otherwise the mask filter will apply late (incorrectly) and none of the original
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// image will be visible.
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2020-10-09 14:45:07 +00:00
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sk_sp<SkImageFilter> edgeBlend = SkImageFilters::Blend(SkBlendMode::kSrcOver,
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2020-03-02 21:27:03 +00:00
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SkImageFilters::Image(image), edgeDetector);
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SkPaint testMaskPaint;
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testMaskPaint.setMaskFilter(maskFilter);
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testMaskPaint.setImageFilter(edgeBlend);
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SkPaint expectedMaskPaint;
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expectedMaskPaint.setImageFilter(SkImageFilters::Compose(edgeBlend,
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2020-10-09 14:45:07 +00:00
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SkImageFilters::Blend(SkBlendMode::kSrcIn,
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SkImageFilters::Shader(alphaMaskShader))));
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2020-03-02 21:27:03 +00:00
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canvas->save();
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canvas->translate(0, image->height());
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canvas->clipRect(crop);
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2021-01-24 02:14:47 +00:00
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canvas->drawImage(image, 0, 0, SkSamplingOptions(), &expectedMaskPaint);
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2020-03-02 21:27:03 +00:00
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canvas->restore();
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|
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canvas->save();
|
|
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canvas->translate(image->width(), image->height());
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|
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canvas->clipRect(crop);
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2021-01-24 02:14:47 +00:00
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canvas->drawImage(image, 0, 0, SkSamplingOptions(), &testMaskPaint);
|
2020-03-02 21:27:03 +00:00
|
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canvas->restore();
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|
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}
|