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Side by Side Diff: gm/surface.cpp

Issue 551463004: introduce Props to surface (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: add new file Created 6 years, 2 months ago
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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
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, NULL, 2, SkShader::kClamp _TileMode);
22 }
23
24 static SkSurface* make_surface(GrContext* ctx, const SkImageInfo& info, SkPixelG eometry 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, info, 0, &props);
37 } else {
38 return SkSurface::NewRaster(info, &props);
39 }
40 }
41
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(NULL);
52
53 paint.setColor(SK_ColorWHITE);
54 paint.setTextSize(32);
55 paint.setTextAlign(SkPaint::kCenter_Align);
56 canvas->drawText(label, strlen(label), W / 2, H * 3 / 4, paint);
57 }
58
59 class SurfacePropsGM : public skiagm::GM {
60 public:
61 SurfacePropsGM() {}
62
63 protected:
64 SkString onShortName() SK_OVERRIDE {
65 return SkString("surfaceprops");
66 }
67
68 virtual SkISize onISize() SK_OVERRIDE {
69 return SkISize::Make(W * 4, H * 5);
70 }
71
72 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
73 GrContext* ctx = canvas->getGrContext();
74
75 // must be opaque to have a hope of testing LCD text
76 const SkImageInfo info = SkImageInfo::MakeN32(W, H, kOpaque_SkAlphaType) ;
77
78 const struct {
79 SkPixelGeometry fGeo;
80 const char* fLabel;
81 } rec[] = {
82 { kUnknown_SkPixelGeometry, "Unknown" },
83 { kRGB_H_SkPixelGeometry, "RGB_H" },
84 { kBGR_H_SkPixelGeometry, "BGR_H" },
85 { kRGB_V_SkPixelGeometry, "RGB_V" },
86 { kBGR_V_SkPixelGeometry, "BGR_V" },
87 };
88
89 SkScalar x = 0;
90 for (int disallowAA = 0; disallowAA <= 1; ++disallowAA) {
91 for (int disallowDither = 0; disallowDither <= 1; ++disallowDither) {
92 SkScalar y = 0;
93 for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) {
94 SkAutoTUnref<SkSurface> surface(make_surface(ctx, info, rec[ i].fGeo,
95 disallowAA, dis allowDither));
96 test_draw(surface->getCanvas(), rec[i].fLabel);
97 surface->draw(canvas, x, y, NULL);
98 y += H;
99 }
100 x += W;
101 }
102 }
103 }
104
105 private:
106 typedef GM INHERITED;
107 };
108
109 DEF_GM( return new SurfacePropsGM )
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