1 /*
2 * Copyright 2014 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 "SkGradientShader.h"
11 #include "SkSurface.h"
12 #include "SkSurfaceProps.h"
13
14 #define W 200
15 #define H 100
16
make_shader()17 static sk_sp<SkShader> make_shader() {
18 int a = 0x99;
19 int b = 0xBB;
20 SkPoint pts[] = { { 0, 0 }, { W, H } };
21 SkColor colors[] = { SkColorSetRGB(a, a, a), SkColorSetRGB(b, b, b) };
22 return SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kClamp_TileMode);
23 }
24
make_surface(GrContext * ctx,const SkImageInfo & info,SkPixelGeometry geo)25 static sk_sp<SkSurface> make_surface(GrContext* ctx, const SkImageInfo& info, SkPixelGeometry geo) {
26 SkSurfaceProps props(0, geo);
27 if (ctx) {
28 return SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info, 0, &props);
29 } else {
30 return SkSurface::MakeRaster(info, &props);
31 }
32 }
33
test_draw(SkCanvas * canvas,const char label[])34 static void test_draw(SkCanvas* canvas, const char label[]) {
35 SkPaint paint;
36
37 paint.setAntiAlias(true);
38 paint.setLCDRenderText(true);
39 paint.setDither(true);
40
41 paint.setShader(make_shader());
42 canvas->drawRect(SkRect::MakeWH(W, H), paint);
43 paint.setShader(nullptr);
44
45 paint.setColor(SK_ColorWHITE);
46 paint.setTextSize(32);
47 paint.setTextAlign(SkPaint::kCenter_Align);
48 sk_tool_utils::set_portable_typeface(&paint);
49 canvas->drawString(label, W / 2, H * 3 / 4, paint);
50 }
51
52 class SurfacePropsGM : public skiagm::GM {
53 public:
SurfacePropsGM()54 SurfacePropsGM() {}
55
56 protected:
onShortName()57 SkString onShortName() override {
58 return SkString("surfaceprops");
59 }
60
onISize()61 SkISize onISize() override {
62 return SkISize::Make(W, H * 5);
63 }
64
onDraw(SkCanvas * canvas)65 void onDraw(SkCanvas* canvas) override {
66 GrContext* ctx = canvas->getGrContext();
67
68 // must be opaque to have a hope of testing LCD text
69 const SkImageInfo info = SkImageInfo::MakeN32(W, H, kOpaque_SkAlphaType);
70
71 const struct {
72 SkPixelGeometry fGeo;
73 const char* fLabel;
74 } recs[] = {
75 { kUnknown_SkPixelGeometry, "Unknown" },
76 { kRGB_H_SkPixelGeometry, "RGB_H" },
77 { kBGR_H_SkPixelGeometry, "BGR_H" },
78 { kRGB_V_SkPixelGeometry, "RGB_V" },
79 { kBGR_V_SkPixelGeometry, "BGR_V" },
80 };
81
82 SkScalar x = 0;
83 SkScalar y = 0;
84 for (const auto& rec : recs) {
85 auto surface(make_surface(ctx, info, rec.fGeo));
86 if (!surface) {
87 SkDebugf("failed to create surface! label: %s", rec.fLabel);
88 continue;
89 }
90 test_draw(surface->getCanvas(), rec.fLabel);
91 surface->draw(canvas, x, y, nullptr);
92 y += H;
93 }
94 }
95
96 private:
97 typedef GM INHERITED;
98 };
DEF_GM(return new SurfacePropsGM)99 DEF_GM( return new SurfacePropsGM )
100
101 #ifdef SK_DEBUG
102 static bool equal(const SkSurfaceProps& a, const SkSurfaceProps& b) {
103 return a.flags() == b.flags() && a.pixelGeometry() == b.pixelGeometry();
104 }
105 #endif
106
107 class NewSurfaceGM : public skiagm::GM {
108 public:
NewSurfaceGM()109 NewSurfaceGM() {}
110
111 protected:
onShortName()112 SkString onShortName() override {
113 return SkString("surfacenew");
114 }
115
onISize()116 SkISize onISize() override {
117 return SkISize::Make(300, 140);
118 }
119
drawInto(SkCanvas * canvas)120 static void drawInto(SkCanvas* canvas) {
121 canvas->drawColor(SK_ColorRED);
122 }
123
onDraw(SkCanvas * canvas)124 void onDraw(SkCanvas* canvas) override {
125 SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
126
127 auto surf(sk_tool_utils::makeSurface(canvas, info, nullptr));
128 drawInto(surf->getCanvas());
129
130 sk_sp<SkImage> image(surf->makeImageSnapshot());
131 canvas->drawImage(image, 10, 10, nullptr);
132
133 auto surf2(surf->makeSurface(info));
134 drawInto(surf2->getCanvas());
135
136 // Assert that the props were communicated transitively through the first image
137 SkASSERT(equal(surf->props(), surf2->props()));
138
139 sk_sp<SkImage> image2(surf2->makeImageSnapshot());
140 canvas->drawImage(image2.get(), 10 + SkIntToScalar(image->width()) + 10, 10, nullptr);
141 }
142
143 private:
144 typedef GM INHERITED;
145 };
146 DEF_GM( return new NewSurfaceGM )
147
148 ///////////////////////////////////////////////////////////////////////////////////////////////////
149
150 DEF_SIMPLE_GM(copy_on_write_retain, canvas, 256, 256) {
151 const SkImageInfo info = SkImageInfo::MakeN32Premul(256, 256);
152 sk_sp<SkSurface> surf = sk_tool_utils::makeSurface(canvas, info);
153
154 surf->getCanvas()->clear(SK_ColorRED);
155 // its important that image survives longer than the next draw, so the surface will see
156 // an outstanding image, and have to decide if it should retain or discard those pixels
157 sk_sp<SkImage> image = surf->makeImageSnapshot();
158
159 // normally a clear+opaque should trigger the discard optimization, but since we have a clip
160 // it should not (we need the previous red pixels).
161 surf->getCanvas()->clipRect(SkRect::MakeWH(128, 256));
162 surf->getCanvas()->clear(SK_ColorBLUE);
163
164 // expect to see two rects: blue | red
165 canvas->drawImage(surf->makeImageSnapshot(), 0, 0, nullptr);
166 }
167
168 DEF_SIMPLE_GM(copy_on_write_savelayer, canvas, 256, 256) {
169 const SkImageInfo info = SkImageInfo::MakeN32Premul(256, 256);
170 sk_sp<SkSurface> surf = sk_tool_utils::makeSurface(canvas, info);
171 surf->getCanvas()->clear(SK_ColorRED);
172 // its important that image survives longer than the next draw, so the surface will see
173 // an outstanding image, and have to decide if it should retain or discard those pixels
174 sk_sp<SkImage> image = surf->makeImageSnapshot();
175
176 // now draw into a full-screen layer. This should (a) trigger a copy-on-write, but it should
177 // not trigger discard, even tho its alpha (SK_ColorBLUE) is opaque, since it is in a layer
178 // with a non-opaque paint.
179 SkPaint paint;
180 paint.setAlpha(0x40);
181 surf->getCanvas()->saveLayer({0, 0, 256, 256}, &paint);
182 surf->getCanvas()->clear(SK_ColorBLUE);
183 surf->getCanvas()->restore();
184
185 // expect to see two rects: blue blended on red
186 canvas->drawImage(surf->makeImageSnapshot(), 0, 0, nullptr);
187 }
188