example.cpp revision 8920e81717c6e51b92ff8f4479a1f959af260556 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17// This is a test program that uses Minikin to layout and draw some text.
18// At the moment, it just draws a string into /data/local/tmp/foo.pgm.
19
20#include <stdio.h>
21#include <vector>
22#include <fstream>
23
24#include <unicode/unistr.h>
25#include <unicode/utf16.h>
26
27#include <minikin/MinikinFontFreeType.h>
28#include <minikin/Layout.h>
29
30using std::vector;
31using namespace android;
32using namespace minikin;
33
34FT_Library library;  // TODO: this should not be a global
35
36FontCollection *makeFontCollection() {
37    vector<FontFamily *>typefaces;
38    const char *fns[] = {
39        "/system/fonts/Roboto-Regular.ttf",
40        "/system/fonts/Roboto-Italic.ttf",
41        "/system/fonts/Roboto-BoldItalic.ttf",
42        "/system/fonts/Roboto-Light.ttf",
43        "/system/fonts/Roboto-Thin.ttf",
44        "/system/fonts/Roboto-Bold.ttf",
45        "/system/fonts/Roboto-ThinItalic.ttf",
46        "/system/fonts/Roboto-LightItalic.ttf"
47    };
48
49    FontFamily *family = new FontFamily();
50    FT_Face face;
51    FT_Error error;
52    for (size_t i = 0; i < sizeof(fns)/sizeof(fns[0]); i++) {
53        const char *fn = fns[i];
54        printf("adding %s\n", fn);
55        error = FT_New_Face(library, fn, 0, &face);
56        if (error != 0) {
57            printf("error loading %s, %d\n", fn, error);
58        }
59        MinikinFont *font = new MinikinFontFreeType(face);
60        family->addFont(font);
61    }
62    typefaces.push_back(family);
63
64#if 1
65    family = new FontFamily();
66    const char *fn = "/system/fonts/DroidSansDevanagari-Regular.ttf";
67    error = FT_New_Face(library, fn, 0, &face);
68    MinikinFont *font = new MinikinFontFreeType(face);
69    family->addFont(font);
70    typefaces.push_back(family);
71#endif
72
73    return new FontCollection(typefaces);
74}
75
76int runMinikinTest() {
77    FT_Error error = FT_Init_FreeType(&library);
78    if (error) {
79        return -1;
80    }
81    Layout::init();
82
83    FontCollection *collection = makeFontCollection();
84    Layout layout;
85    layout.setFontCollection(collection);
86    const char *text = "fine world \xe0\xa4\xa8\xe0\xa4\xae\xe0\xa4\xb8\xe0\xa5\x8d\xe0\xa4\xa4\xe0\xa5\x87";
87    int bidiFlags = 0;
88    FontStyle fontStyle;
89    MinikinPaint paint;
90    paint.size = 32;
91    icu::UnicodeString icuText = icu::UnicodeString::fromUTF8(text);
92    layout.doLayout(icuText.getBuffer(), 0, icuText.length(), icuText.length(), bidiFlags, fontStyle, paint);
93    layout.dump();
94    Bitmap bitmap(250, 50);
95    layout.draw(&bitmap, 10, 40, 32);
96    std::ofstream o;
97    o.open("/data/local/tmp/foo.pgm", std::ios::out | std::ios::binary);
98    bitmap.writePnm(o);
99    return 0;
100}
101
102int main(int argc, const char** argv) {
103    return runMinikinTest();
104}
105