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.h"
9 #include "sk_tool_utils.h"
10 #include "SkColorFilter.h"
11
12 #include "SkColorFilterImageFilter.h"
13 #include "SkDropShadowImageFilter.h"
14
15 ///////////////////////////////////////////////////////////////////////////////
16
draw_paint(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)17 static void draw_paint(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
18 SkPaint paint;
19 paint.setImageFilter(std::move(imf));
20 paint.setColor(SK_ColorBLACK);
21 canvas->save();
22 canvas->clipRect(r);
23 canvas->drawPaint(paint);
24 canvas->restore();
25 }
26
draw_path(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)27 static void draw_path(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
28 SkPaint paint;
29 paint.setColor(SK_ColorGREEN);
30 paint.setImageFilter(std::move(imf));
31 paint.setAntiAlias(true);
32 canvas->save();
33 canvas->clipRect(r);
34 canvas->drawCircle(r.centerX(), r.centerY(), r.width()/3, paint);
35 canvas->restore();
36 }
37
draw_text(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)38 static void draw_text(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
39 SkPaint paint;
40 paint.setImageFilter(std::move(imf));
41 paint.setColor(SK_ColorGREEN);
42 paint.setAntiAlias(true);
43 sk_tool_utils::set_portable_typeface(&paint);
44 paint.setTextSize(r.height()/2);
45 paint.setTextAlign(SkPaint::kCenter_Align);
46 canvas->save();
47 canvas->clipRect(r);
48 canvas->drawString("Text", r.centerX(), r.centerY(), paint);
49 canvas->restore();
50 }
51
draw_bitmap(SkCanvas * canvas,const SkRect & r,sk_sp<SkImageFilter> imf)52 static void draw_bitmap(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) {
53 SkPaint paint;
54
55 SkIRect bounds;
56 r.roundOut(&bounds);
57
58 SkBitmap bm;
59 bm.allocN32Pixels(bounds.width(), bounds.height());
60 bm.eraseColor(SK_ColorTRANSPARENT);
61 SkCanvas c(bm);
62 draw_path(&c, r, nullptr);
63
64 paint.setImageFilter(std::move(imf));
65 canvas->save();
66 canvas->clipRect(r);
67 canvas->drawBitmap(bm, 0, 0, &paint);
68 canvas->restore();
69 }
70
71 ///////////////////////////////////////////////////////////////////////////////
72
73 DEF_SIMPLE_GM(dropshadowimagefilter, canvas, 400, 656) {
74 void (*drawProc[])(SkCanvas*, const SkRect&, sk_sp<SkImageFilter>) = {
75 draw_bitmap, draw_path, draw_paint, draw_text
76 };
77
78 sk_sp<SkColorFilter> cf(SkColorFilter::MakeModeFilter(SK_ColorMAGENTA,
79 SkBlendMode::kSrcIn));
80 sk_sp<SkImageFilter> cfif(SkColorFilterImageFilter::Make(std::move(cf), nullptr));
81 SkImageFilter::CropRect cropRect(SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)),
82 SkImageFilter::CropRect::kHasAll_CropEdge);
83 SkImageFilter::CropRect bogusRect(SkRect::Make(SkIRect::MakeXYWH(-100, -100, 10, 10)),
84 SkImageFilter::CropRect::kHasAll_CropEdge);
85
86 sk_sp<SkImageFilter> filters[] = {
87 nullptr,
88 SkDropShadowImageFilter::Make(7.0f, 0.0f, 0.0f, 3.0f, SK_ColorBLUE,
89 SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, nullptr),
90 SkDropShadowImageFilter::Make(0.0f, 7.0f, 3.0f, 0.0f, SK_ColorBLUE,
91 SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, nullptr),
92 SkDropShadowImageFilter::Make(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE,
93 SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, nullptr),
94 SkDropShadowImageFilter::Make(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE,
95 SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, std::move(cfif)),
96 SkDropShadowImageFilter::Make(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE,
97 SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, nullptr, &cropRect),
98 SkDropShadowImageFilter::Make(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE,
99 SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, nullptr, &bogusRect),
100 SkDropShadowImageFilter::Make(7.0f, 7.0f, 3.0f, 3.0f, SK_ColorBLUE,
101 SkDropShadowImageFilter::kDrawShadowOnly_ShadowMode, nullptr),
102 };
103
104 SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
105 SkScalar MARGIN = SkIntToScalar(16);
106 SkScalar DX = r.width() + MARGIN;
107 SkScalar DY = r.height() + MARGIN;
108
109 canvas->translate(MARGIN, MARGIN);
110 for (size_t j = 0; j < SK_ARRAY_COUNT(drawProc); ++j) {
111 canvas->save();
112 for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
113 drawProc[j](canvas, r, filters[i]);
114 canvas->translate(0, DY);
115 }
116 canvas->restore();
117 canvas->translate(DX, 0);
118 }
119 }
120