aboutsummaryrefslogtreecommitdiffhomepage
path: root/tools/sk_tool_utils.h
blob: 1d80731fd4a67f86e267a7d7f21abcd30b9d1a81 (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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
/*
 * Copyright 2014 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef sk_tool_utils_DEFINED
#define sk_tool_utils_DEFINED

#include "SkColor.h"
#include "SkImageEncoder.h"
#include "SkImageInfo.h"
#include "SkPixelSerializer.h"
#include "SkRandom.h"
#include "SkTDArray.h"
#include "SkTypeface.h"

class SkBitmap;
class SkCanvas;
class SkPaint;
class SkPath;
class SkShader;
class SkTestFont;
class SkTextBlobBuilder;

namespace sk_tool_utils {

    const char* colortype_name(SkColorType);

    /**
     * Map opaque colors from 8888 to 565.
     */
    SkColor color_to_565(SkColor color);

    /**
     * Return a color emoji typeface if available.
     */
    void emoji_typeface(SkAutoTUnref<SkTypeface>* );

    /**
     * If the platform supports color emoji, return sample text the emoji can render.
     */
    const char* emoji_sample_text();

    /**
     * If the platform supports color emoji, return the type (i.e. "CBDT", "SBIX", "").
     */
    const char* platform_os_emoji();

    /**
     * Return the platform name with the version number ("Mac10.9", "Win8", etc.) if available.
     */
    const char* platform_os_name();

    /**
     * Return the platform name without the version number ("Mac", "Win", etc.) if available.
     */
    SkString major_platform_os_name();

    /**
     * Return the platform extra config (e.g. "GDI") if available.
     */
    const char* platform_extra_config(const char* config);

    /**
     * Map serif, san-serif, and monospace to the platform-specific font name.
     */
    const char* platform_font_name(const char* name);

    /**
     * Sets the paint to use a platform-independent text renderer
     */
    void set_portable_typeface(SkPaint* paint, const char* name = nullptr,
                               SkTypeface::Style style = SkTypeface::kNormal);

    /**
     * Returns a platform-independent text renderer.
     */
    SkTypeface* create_portable_typeface(const char* name, SkTypeface::Style style);

    /** Call to clean up portable font references. */
    void release_portable_typefaces();

    /**
     *  Call canvas->writePixels() by using the pixels from bitmap, but with an info that claims
     *  the pixels are colorType + alphaType
     */
    void write_pixels(SkCanvas*, const SkBitmap&, int x, int y, SkColorType, SkAlphaType);

    // private to sk_tool_utils
    SkTypeface* create_font(const char* name, SkTypeface::Style);

    /** Returns a newly created CheckerboardShader. */
    sk_sp<SkShader> create_checkerboard_shader(SkColor c1, SkColor c2, int size);

    /** Draw a checkerboard pattern in the current canvas, restricted to
        the current clip, using SkXfermode::kSrc_Mode. */
    void draw_checkerboard(SkCanvas* canvas,
                           SkColor color1,
                           SkColor color2,
                           int checkSize);

    /** Make it easier to create a bitmap-based checkerboard */
    SkBitmap create_checkerboard_bitmap(int w, int h,
                                        SkColor c1, SkColor c2,
                                        int checkSize);

    /** A default checkerboard. */
    inline void draw_checkerboard(SkCanvas* canvas) {
        sk_tool_utils::draw_checkerboard(canvas, 0xFF999999, 0xFF666666, 8);
    }

    SkBitmap create_string_bitmap(int w, int h, SkColor c, int x, int y,
                                  int textSize, const char* str);

    // A helper for inserting a drawtext call into a SkTextBlobBuilder
    void add_to_text_blob(SkTextBlobBuilder* builder, const char* text, const SkPaint& origPaint,
                          SkScalar x, SkScalar y);

    void create_hemi_normal_map(SkBitmap* bm, const SkIRect& dst);

    void create_frustum_normal_map(SkBitmap* bm, const SkIRect& dst);

    void create_tetra_normal_map(SkBitmap* bm, const SkIRect& dst);

    void make_big_path(SkPath& path);

    // Return a blurred version of 'src'. This doesn't use a separable filter
    // so it is slow!
    SkBitmap slow_blur(const SkBitmap& src, float sigma);

    // A helper object to test the topological sorting code (TopoSortBench.cpp & TopoSortTest.cpp)
    class TopoTestNode {
    public:
        TopoTestNode(int id) : fID(id), fOutputPos(-1), fTempMark(false) { }

        void dependsOn(TopoTestNode* src) {
            *fDependencies.append() = src;
        }

        int id() const { return fID; }
        void reset() { fOutputPos = -1; }

        int outputPos() const { return fOutputPos; }

        // check that the topological sort is valid for this node
        bool check() {
            if (-1 == fOutputPos) {
                return false;
            }

            for (int i = 0; i < fDependencies.count(); ++i) {
                if (-1 == fDependencies[i]->outputPos()) {
                    return false;
                }
                // This node should've been output after all the nodes on which it depends
                if (fOutputPos < fDependencies[i]->outputPos()) {
                    return false;
                }
            }

            return true;
        }

        // The following 7 methods are needed by the topological sort
        static void SetTempMark(TopoTestNode* node) { node->fTempMark = true; }
        static void ResetTempMark(TopoTestNode* node) { node->fTempMark = false; }
        static bool IsTempMarked(TopoTestNode* node) { return node->fTempMark; }
        static void Output(TopoTestNode* node, int outputPos) {
            SkASSERT(-1 != outputPos);
            node->fOutputPos = outputPos;
        }
        static bool WasOutput(TopoTestNode* node) { return (-1 != node->fOutputPos); }
        static int NumDependencies(TopoTestNode* node) { return node->fDependencies.count(); }
        static TopoTestNode* Dependency(TopoTestNode* node, int index) {
            return node->fDependencies[index];
        }

        // Helper functions for TopoSortBench & TopoSortTest
        static void AllocNodes(SkTDArray<TopoTestNode*>* graph, int num) {
            graph->setReserve(num);

            for (int i = 0; i < num; ++i) {
                *graph->append() = new TopoTestNode(i);
            }
        }

        static void DeallocNodes(SkTDArray<TopoTestNode*>* graph) {
            for (int i = 0; i < graph->count(); ++i) {
                delete (*graph)[i];
            }
        }

        #ifdef SK_DEBUG
        static void Print(const SkTDArray<TopoTestNode*>& graph) {
            for (int i = 0; i < graph.count(); ++i) {
                SkDebugf("%d, ", graph[i]->id());
            }
            SkDebugf("\n");
        }
        #endif

        // randomize the array
        static void Shuffle(SkTDArray<TopoTestNode*>* graph, SkRandom* rand) {
            for (int i = graph->count()-1; i > 0; --i) {
                int swap = rand->nextU() % (i+1);

                TopoTestNode* tmp = (*graph)[i];
                (*graph)[i] = (*graph)[swap];
                (*graph)[swap] = tmp;
            }
        }

    private:
        int  fID;
        int  fOutputPos;
        bool fTempMark;

        SkTDArray<TopoTestNode*> fDependencies;
    };

}  // namespace sk_tool_utils

#endif  // sk_tool_utils_DEFINED