senorblanco | 5878dbd | 2016-05-19 14:50:29 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "gm.h" |
Mike Klein | 33d2055 | 2017-03-22 13:47:51 -0400 | [diff] [blame] | 9 | #include "sk_tool_utils.h" |
senorblanco | 5878dbd | 2016-05-19 14:50:29 -0700 | [diff] [blame] | 10 | #include "SkBlurImageFilter.h" |
| 11 | #include "SkCanvas.h" |
| 12 | #include "SkColorFilter.h" |
| 13 | #include "SkColorFilterImageFilter.h" |
| 14 | #include "SkDropShadowImageFilter.h" |
| 15 | #include "SkSurface.h" |
| 16 | |
| 17 | /////////////////////////////////////////////////////////////////////////////// |
| 18 | |
| 19 | static void show_bounds(SkCanvas* canvas, const SkIRect& subset, const SkIRect& clip) { |
| 20 | SkIRect rects[] { subset, clip }; |
| 21 | SkColor colors[] { SK_ColorRED, SK_ColorBLUE }; |
| 22 | |
| 23 | SkPaint paint; |
| 24 | paint.setStyle(SkPaint::kStroke_Style); |
| 25 | |
| 26 | for (size_t i = 0; i < SK_ARRAY_COUNT(rects); ++i) { |
| 27 | paint.setColor(colors[i]); |
| 28 | canvas->drawRect(SkRect::Make(rects[i]), paint); |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | // In this GM, we're going to feed the inner portion of a 100x100 checkboard |
| 33 | // (i.e., strip off a 25-wide border) through the makeWithFilter method. |
| 34 | // We'll then draw the appropriate subset of the result to the screen at the |
| 35 | // given offset. |
| 36 | class ImageMakeWithFilterGM : public skiagm::GM { |
| 37 | public: |
| 38 | ImageMakeWithFilterGM () {} |
| 39 | |
| 40 | protected: |
| 41 | SkString onShortName() override { |
| 42 | return SkString("imagemakewithfilter"); |
| 43 | } |
| 44 | |
senorblanco | 56f7dfe | 2016-05-20 07:59:09 -0700 | [diff] [blame] | 45 | SkISize onISize() override { return SkISize::Make(440, 530); } |
senorblanco | 5878dbd | 2016-05-19 14:50:29 -0700 | [diff] [blame] | 46 | |
| 47 | void onDraw(SkCanvas* canvas) override { |
Mike Reed | 7d954ad | 2016-10-28 15:42:34 -0400 | [diff] [blame] | 48 | auto cf = SkColorFilter::MakeModeFilter(SK_ColorGREEN, SkBlendMode::kSrc); |
senorblanco | 5878dbd | 2016-05-19 14:50:29 -0700 | [diff] [blame] | 49 | sk_sp<SkImageFilter> filters[] = { |
| 50 | SkColorFilterImageFilter::Make(std::move(cf), nullptr), |
| 51 | SkBlurImageFilter::Make(2.0f, 2.0f, nullptr), |
| 52 | SkDropShadowImageFilter::Make( |
| 53 | 10.0f, 5.0f, 3.0f, 3.0f, SK_ColorBLUE, |
| 54 | SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, |
| 55 | nullptr), |
| 56 | }; |
| 57 | |
| 58 | SkIRect clipBounds[] { |
| 59 | { -20, -20, 100, 100 }, |
| 60 | { 0, 0, 75, 75 }, |
| 61 | { 20, 20, 100, 100 }, |
| 62 | { -20, -20, 50, 50 }, |
| 63 | { 20, 20, 50, 50 }, |
| 64 | }; |
| 65 | |
| 66 | SkImageInfo info = SkImageInfo::MakeN32(100, 100, kPremul_SkAlphaType); |
| 67 | SkScalar MARGIN = SkIntToScalar(40); |
| 68 | SkScalar DX = info.width() + MARGIN; |
| 69 | SkScalar DY = info.height() + MARGIN; |
| 70 | |
| 71 | canvas->translate(MARGIN, MARGIN); |
| 72 | |
Cary Clark | a24712e | 2018-09-05 18:41:40 +0000 | [diff] [blame] | 73 | sk_sp<SkSurface> surface = sk_tool_utils::makeSurface(canvas, info); |
senorblanco | 5878dbd | 2016-05-19 14:50:29 -0700 | [diff] [blame] | 74 | sk_tool_utils::draw_checkerboard(surface->getCanvas()); |
| 75 | sk_sp<SkImage> source = surface->makeImageSnapshot(); |
| 76 | |
| 77 | for (auto clipBound : clipBounds) { |
| 78 | canvas->save(); |
| 79 | for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) { |
| 80 | SkIRect subset = SkIRect::MakeXYWH(25, 25, 50, 50); |
| 81 | SkIRect outSubset; |
| 82 | SkIPoint offset; |
| 83 | sk_sp<SkImage> result = source->makeWithFilter(filters[i].get(), subset, clipBound, |
| 84 | &outSubset, &offset); |
| 85 | SkASSERT(result); |
| 86 | SkASSERT(source->isTextureBacked() == result->isTextureBacked()); |
| 87 | result = result->makeSubset(outSubset); |
| 88 | canvas->drawImage(result.get(), SkIntToScalar(offset.fX), SkIntToScalar(offset.fY)); |
| 89 | show_bounds(canvas, SkIRect::MakeXYWH(offset.x(), offset.y(), outSubset.width(), |
| 90 | outSubset.height()), clipBound); |
| 91 | canvas->translate(DX, 0); |
| 92 | } |
| 93 | canvas->restore(); |
| 94 | canvas->translate(0, DY); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | private: |
| 99 | typedef GM INHERITED; |
| 100 | }; |
| 101 | DEF_GM( return new ImageMakeWithFilterGM; ) |