1 /*
2 * Copyright 2013 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/gm.h"
9 #include "include/core/SkBitmap.h"
10 #include "include/core/SkBlendMode.h"
11 #include "include/core/SkCanvas.h"
12 #include "include/core/SkColor.h"
13 #include "include/core/SkColorFilter.h"
14 #include "include/core/SkFont.h"
15 #include "include/core/SkImageFilter.h"
16 #include "include/core/SkPaint.h"
17 #include "include/core/SkRect.h"
18 #include "include/core/SkRefCnt.h"
19 #include "include/core/SkScalar.h"
20 #include "include/core/SkTypeface.h"
21 #include "include/core/SkTypes.h"
22 #include "include/effects/SkImageFilters.h"
23 #include "include/utils/SkTextUtils.h"
24 #include "tools/ToolUtils.h"
25 #include "tools/fonts/FontToolUtils.h"
26
27 #include <utility>
28
29 ///////////////////////////////////////////////////////////////////////////////
30
draw_paint(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)31 static void draw_paint(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
32 SkPaint paint;
33 paint.setImageFilter(std::move(imf));
34 paint.setColor(SK_ColorBLACK);
35 canvas->save();
36 canvas->clipRect(r);
37 canvas->drawPaint(paint);
38 canvas->restore();
39 }
40
draw_path(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)41 static void draw_path(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
42 SkPaint paint;
43 paint.setColor(SK_ColorGREEN);
44 paint.setImageFilter(std::move(imf));
45 paint.setAntiAlias(true);
46 canvas->save();
47 canvas->clipRect(r);
48 canvas->drawCircle(r.centerX(), r.centerY(), r.width()/3, paint);
49 canvas->restore();
50 }
51
draw_text(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)52 static void draw_text(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
53 SkPaint paint;
54 paint.setImageFilter(std::move(imf));
55 paint.setColor(SK_ColorGREEN);
56 paint.setAntiAlias(true);
57
58 SkFont font(ToolUtils::DefaultPortableTypeface(), r.height() / 2);
59 canvas->save();
60 canvas->clipRect(r);
61 SkTextUtils::DrawString(canvas, "Text", r.centerX(), r.centerY(), font, paint, SkTextUtils::kCenter_Align);
62 canvas->restore();
63 }
64
draw_bitmap(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)65 static void draw_bitmap(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
66 SkPaint paint;
67
68 SkIRect bounds;
69 r.roundOut(&bounds);
70
71 auto surf = SkSurfaces::Raster(SkImageInfo::MakeN32Premul(bounds.width(), bounds.height()));
72 draw_path(surf->getCanvas(), r, nullptr);
73
74 paint.setImageFilter(std::move(imf));
75 canvas->save();
76 canvas->clipRect(r);
77 surf->draw(canvas, 0, 0, SkSamplingOptions(), &paint);
78 canvas->restore();
79 }
80
81 ///////////////////////////////////////////////////////////////////////////////
82
83 DEF_SIMPLE_GM(dropshadowimagefilter, canvas, 400, 656) {
84 void (*drawProc[])(SkCanvas*, const SkRect&, sk_sp<SkImageFilter>) = {
85 draw_bitmap, draw_path, draw_paint, draw_text
86 };
87
88 sk_sp<SkColorFilter> cf(SkColorFilters::Blend(SK_ColorMAGENTA, SkBlendMode::kSrcIn));
89 sk_sp<SkImageFilter> cfif(SkImageFilters::ColorFilter(std::move(cf), nullptr));
90 SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44);
91 SkIRect bogusRect = SkIRect::MakeXYWH(-100, -100, 10, 10);
92
93 sk_sp<SkColorSpace> spinCS = SkColorSpace::MakeSRGB()->makeColorSpin();
94 sk_sp<SkImageFilter> filters[] = {
95 nullptr,
96 SkImageFilters::DropShadow(7.0f, 0.0f, 0.0f, 3.0f, SK_ColorBLUE, nullptr),
97 SkImageFilters::DropShadow(0.0f, 7.0f, 3.0f, 0.0f, SK_ColorBLUE, nullptr),
98 SkImageFilters::DropShadow(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, nullptr),
99 SkImageFilters::DropShadow(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, std::move(cfif)),
100 SkImageFilters::DropShadow(
101 7.0f, 7.0f, 3.0f, 3.0f, SkColors::kGreen, spinCS, nullptr, &cropRect),
102 SkImageFilters::DropShadow(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, nullptr, &bogusRect),
103 SkImageFilters::DropShadowOnly(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE, nullptr),
104 };
105
106 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
107 SkScalar MARGIN = SkIntToScalar(16);
108 SkScalar DX = r.width() + MARGIN;
109 SkScalar DY = r.height() + MARGIN;
110
111 canvas->translate(MARGIN, MARGIN);
112 for (size_t j = 0; j < std::size(drawProc); ++j) {
113 canvas->save();
114 for (size_t i = 0; i < std::size(filters); ++i) {
115 drawProc[j](canvas, r, filters[i]);
116 canvas->translate(0, DY);
117 }
118 canvas->restore();
119 canvas->translate(DX, 0);
120 }
121 }
122