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 "SkGradientShader.h"
10 #include "SkSurface.h"
11 #include "SkSurfaceProps.h"
12
13 #define W 200
14 #define H 100
15
make_shader()16 static SkShader* make_shader() {
17 int a = 0x99;
18 int b = 0xBB;
19 SkPoint pts[] = { { 0, 0 }, { W, H } };
20 SkColor colors[] = { SkColorSetRGB(a, a, a), SkColorSetRGB(b, b, b) };
21 return SkGradientShader::CreateLinear(pts, colors, nullptr, 2, SkShader::kClamp_TileMode);
22 }
23
make_surface(GrContext * ctx,const SkImageInfo & info,SkPixelGeometry geo,int disallowAA,int disallowDither)24 static SkSurface* make_surface(GrContext* ctx, const SkImageInfo& info, SkPixelGeometry geo,
25 int disallowAA, int disallowDither) {
26 uint32_t flags = 0;
27 if (disallowAA) {
28 flags |= SkSurfaceProps::kDisallowAntiAlias_Flag;
29 }
30 if (disallowDither) {
31 flags |= SkSurfaceProps::kDisallowDither_Flag;
32 }
33
34 SkSurfaceProps props(flags, geo);
35 if (ctx) {
36 return SkSurface::NewRenderTarget(ctx, SkBudgeted::kNo, info, 0, &props);
37 } else {
38 return SkSurface::NewRaster(info, &props);
39 }
40 }
41
test_draw(SkCanvas * canvas,const char label[])42 static void test_draw(SkCanvas* canvas, const char label[]) {
43 SkPaint paint;
44
45 paint.setAntiAlias(true);
46 paint.setLCDRenderText(true);
47 paint.setDither(true);
48
49 paint.setShader(make_shader())->unref();
50 canvas->drawRect(SkRect::MakeWH(W, H), paint);
51 paint.setShader(nullptr);
52
53 paint.setColor(SK_ColorWHITE);
54 paint.setTextSize(32);
55 paint.setTextAlign(SkPaint::kCenter_Align);
56 sk_tool_utils::set_portable_typeface(&paint);
57 canvas->drawText(label, strlen(label), W / 2, H * 3 / 4, paint);
58 }
59
60 class SurfacePropsGM : public skiagm::GM {
61 public:
SurfacePropsGM()62 SurfacePropsGM() {}
63
64 protected:
onShortName()65 SkString onShortName() override {
66 return SkString("surfaceprops");
67 }
68
onISize()69 SkISize onISize() override {
70 return SkISize::Make(W * 4, H * 5);
71 }
72
onDraw(SkCanvas * canvas)73 void onDraw(SkCanvas* canvas) override {
74 GrContext* ctx = canvas->getGrContext();
75
76 // must be opaque to have a hope of testing LCD text
77 const SkImageInfo info = SkImageInfo::MakeN32(W, H, kOpaque_SkAlphaType);
78
79 const struct {
80 SkPixelGeometry fGeo;
81 const char* fLabel;
82 } rec[] = {
83 { kUnknown_SkPixelGeometry, "Unknown" },
84 { kRGB_H_SkPixelGeometry, "RGB_H" },
85 { kBGR_H_SkPixelGeometry, "BGR_H" },
86 { kRGB_V_SkPixelGeometry, "RGB_V" },
87 { kBGR_V_SkPixelGeometry, "BGR_V" },
88 };
89
90 SkScalar x = 0;
91 for (int disallowAA = 0; disallowAA <= 1; ++disallowAA) {
92 for (int disallowDither = 0; disallowDither <= 1; ++disallowDither) {
93 SkScalar y = 0;
94 for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) {
95 SkAutoTUnref<SkSurface> surface(make_surface(ctx, info, rec[i].fGeo,
96 disallowAA, disallowDither));
97 test_draw(surface->getCanvas(), rec[i].fLabel);
98 surface->draw(canvas, x, y, nullptr);
99 y += H;
100 }
101 x += W;
102 }
103 }
104 }
105
106 private:
107 typedef GM INHERITED;
108 };
DEF_GM(return new SurfacePropsGM)109 DEF_GM( return new SurfacePropsGM )
110
111 #ifdef SK_DEBUG
112 static bool equal(const SkSurfaceProps& a, const SkSurfaceProps& b) {
113 return a.flags() == b.flags() && a.pixelGeometry() == b.pixelGeometry();
114 }
115 #endif
116
117 class NewSurfaceGM : public skiagm::GM {
118 public:
NewSurfaceGM()119 NewSurfaceGM() {}
120
121 protected:
onShortName()122 SkString onShortName() override {
123 return SkString("surfacenew");
124 }
125
onISize()126 SkISize onISize() override {
127 return SkISize::Make(300, 140);
128 }
129
drawInto(SkCanvas * canvas)130 static void drawInto(SkCanvas* canvas) {
131 canvas->drawColor(SK_ColorRED);
132 }
133
onDraw(SkCanvas * canvas)134 void onDraw(SkCanvas* canvas) override {
135 SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
136
137 SkAutoTUnref<SkSurface> surf(canvas->newSurface(info, nullptr));
138 if (!surf.get()) {
139 surf.reset(SkSurface::NewRaster(info));
140 }
141 drawInto(surf->getCanvas());
142
143 SkAutoTUnref<SkImage> image(surf->newImageSnapshot());
144 canvas->drawImage(image, 10, 10, nullptr);
145
146 SkAutoTUnref<SkSurface> surf2(surf->newSurface(info));
147 drawInto(surf2->getCanvas());
148
149 // Assert that the props were communicated transitively through the first image
150 SkASSERT(equal(surf->props(), surf2->props()));
151
152 SkAutoTUnref<SkImage> image2(surf2->newImageSnapshot());
153 canvas->drawImage(image2, 10 + SkIntToScalar(image->width()) + 10, 10, nullptr);
154 }
155
156 private:
157 typedef GM INHERITED;
158 };
159 DEF_GM( return new NewSurfaceGM )
160
161