aboutsummaryrefslogtreecommitdiffhomepage
path: root/gm/surface.cpp
blob: c3eaf9e8d2075a870ead5645c1e4e0e16c3c7f9f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
/*
 * Copyright 2014 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "gm.h"
#include "SkGradientShader.h"
#include "SkSurface.h"
#include "SkSurfaceProps.h"

#define W 200
#define H 100

static SkShader* make_shader() {
    int a = 0x99;
    int b = 0xBB;
    SkPoint pts[] = { { 0, 0 }, { W, H } };
    SkColor colors[] = { SkColorSetRGB(a, a, a), SkColorSetRGB(b, b, b) };
    return SkGradientShader::CreateLinear(pts, colors, nullptr, 2, SkShader::kClamp_TileMode);
}

static SkSurface* make_surface(GrContext* ctx, const SkImageInfo& info, SkPixelGeometry geo,
                               int disallowAA, int disallowDither) {
    uint32_t flags = 0;
    if (disallowAA) {
        flags |= SkSurfaceProps::kDisallowAntiAlias_Flag;
    }
    if (disallowDither) {
        flags |= SkSurfaceProps::kDisallowDither_Flag;
    }

    SkSurfaceProps props(flags, geo);
    if (ctx) {
        return SkSurface::NewRenderTarget(ctx, SkBudgeted::kNo, info, 0, &props);
    } else {
        return SkSurface::NewRaster(info, &props);
    }
}

static void test_draw(SkCanvas* canvas, const char label[]) {
    SkPaint paint;

    paint.setAntiAlias(true);
    paint.setLCDRenderText(true);
    paint.setDither(true);

    paint.setShader(make_shader())->unref();
    canvas->drawRect(SkRect::MakeWH(W, H), paint);
    paint.setShader(nullptr);

    paint.setColor(SK_ColorWHITE);
    paint.setTextSize(32);
    paint.setTextAlign(SkPaint::kCenter_Align);
    sk_tool_utils::set_portable_typeface(&paint);
    canvas->drawText(label, strlen(label), W / 2, H * 3 / 4, paint);
}

class SurfacePropsGM : public skiagm::GM {
public:
    SurfacePropsGM() {}

protected:
    SkString onShortName() override {
        return SkString("surfaceprops");
    }

    SkISize onISize() override {
        return SkISize::Make(W * 4, H * 5);
    }

    void onDraw(SkCanvas* canvas) override {
        GrContext* ctx = canvas->getGrContext();

        // must be opaque to have a hope of testing LCD text
        const SkImageInfo info = SkImageInfo::MakeN32(W, H, kOpaque_SkAlphaType);

        const struct {
            SkPixelGeometry fGeo;
            const char*     fLabel;
        } rec[] = {
            { kUnknown_SkPixelGeometry, "Unknown" },
            { kRGB_H_SkPixelGeometry,   "RGB_H" },
            { kBGR_H_SkPixelGeometry,   "BGR_H" },
            { kRGB_V_SkPixelGeometry,   "RGB_V" },
            { kBGR_V_SkPixelGeometry,   "BGR_V" },
        };
    
        SkScalar x = 0;
        for (int disallowAA = 0; disallowAA <= 1; ++disallowAA) {
            for (int disallowDither = 0; disallowDither <= 1; ++disallowDither) {
                SkScalar y = 0;
                for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) {
                    SkAutoTUnref<SkSurface> surface(make_surface(ctx, info, rec[i].fGeo,
                                                                 disallowAA, disallowDither));
                    test_draw(surface->getCanvas(), rec[i].fLabel);
                    surface->draw(canvas, x, y, nullptr);
                    y += H;
                }
                x += W;
            }
        }
    }

private:
    typedef GM INHERITED;
};
DEF_GM( return new SurfacePropsGM )

#ifdef SK_DEBUG
static bool equal(const SkSurfaceProps& a, const SkSurfaceProps& b) {
    return a.flags() == b.flags() && a.pixelGeometry() == b.pixelGeometry();
}
#endif

class NewSurfaceGM : public skiagm::GM {
public:
    NewSurfaceGM() {}

protected:
    SkString onShortName() override {
        return SkString("surfacenew");
    }

    SkISize onISize() override {
        return SkISize::Make(300, 140);
    }

    static void drawInto(SkCanvas* canvas) {
        canvas->drawColor(SK_ColorRED);
    }

    void onDraw(SkCanvas* canvas) override {
        SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);

        SkAutoTUnref<SkSurface> surf(canvas->newSurface(info, nullptr));
        if (!surf.get()) {
            surf.reset(SkSurface::NewRaster(info));
        }
        drawInto(surf->getCanvas());

        SkAutoTUnref<SkImage> image(surf->newImageSnapshot());
        canvas->drawImage(image, 10, 10, nullptr);

        SkAutoTUnref<SkSurface> surf2(surf->newSurface(info));
        drawInto(surf2->getCanvas());

        // Assert that the props were communicated transitively through the first image
        SkASSERT(equal(surf->props(), surf2->props()));

        SkAutoTUnref<SkImage> image2(surf2->newImageSnapshot());
        canvas->drawImage(image2, 10 + SkIntToScalar(image->width()) + 10, 10, nullptr);
    }

private:
    typedef GM INHERITED;
};
DEF_GM( return new NewSurfaceGM )