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 "include/core/SkBitmap.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkColor.h"
11 #include "include/core/SkFont.h"
12 #include "include/core/SkFontArguments.h"
13 #include "include/core/SkFontMgr.h"
14 #include "include/core/SkFontStyle.h"
15 #include "include/core/SkPaint.h"
16 #include "include/core/SkPoint.h"
17 #include "include/core/SkRefCnt.h"
18 #include "include/core/SkScalar.h"
19 #include "include/core/SkStream.h"
20 #include "include/core/SkString.h"
21 #include "include/core/SkTypeface.h"
22 #include "include/core/SkTypes.h"
23 #include "include/ports/SkFontMgr_fontconfig.h"
24 #include "tests/Test.h"
25 #include "tools/Resources.h"
26
27 #include <fontconfig/fontconfig.h>
28
29 #include <array>
30 #include <memory>
31
32 namespace {
33
bitmap_compare(const SkBitmap & ref,const SkBitmap & test)34 bool bitmap_compare(const SkBitmap& ref, const SkBitmap& test) {
35 for (int y = 0; y < test.height(); ++y) {
36 for (int x = 0; x < test.width(); ++x) {
37 SkColor testColor = test.getColor(x, y);
38 SkColor refColor = ref.getColor(x, y);
39 if (refColor != testColor) {
40 return false;
41 }
42 }
43 }
44 return true;
45 }
46
build_fontconfig_with_fontfile(const char * fontFilename)47 FcConfig* build_fontconfig_with_fontfile(const char* fontFilename) {
48 FcConfig* config = FcConfigCreate();
49
50 // FontConfig may modify the passed path (make absolute or other).
51 FcConfigSetSysRoot(config, reinterpret_cast<const FcChar8*>(GetResourcePath("").c_str()));
52 // FontConfig will lexically compare paths against its version of the sysroot.
53 SkString fontFilePath(reinterpret_cast<const char*>(FcConfigGetSysRoot(config)));
54 fontFilePath += fontFilename;
55 FcConfigAppFontAddFile(config, reinterpret_cast<const FcChar8*>(fontFilePath.c_str()));
56
57 FcConfigBuildFonts(config);
58 return config;
59 }
60
61 } // namespace
62
DEF_TEST(FontMgrFontConfig,reporter)63 DEF_TEST(FontMgrFontConfig, reporter) {
64 FcConfig* config = build_fontconfig_with_fontfile("/fonts/Distortable.ttf");
65
66 sk_sp<SkFontMgr> fontMgr(SkFontMgr_New_FontConfig(config));
67 sk_sp<SkTypeface> typeface(fontMgr->legacyMakeTypeface("Distortable", SkFontStyle()));
68 if (!typeface) {
69 ERRORF(reporter, "Could not find typeface. FcVersion: %d", FcGetVersion());
70 return;
71 }
72
73 SkBitmap bitmapStream;
74 bitmapStream.allocN32Pixels(64, 64);
75 SkCanvas canvasStream(bitmapStream);
76 canvasStream.drawColor(SK_ColorWHITE);
77
78 SkBitmap bitmapClone;
79 bitmapClone.allocN32Pixels(64, 64);
80 SkCanvas canvasClone(bitmapClone);
81 canvasStream.drawColor(SK_ColorWHITE);
82
83 SkPaint paint;
84 paint.setColor(SK_ColorGRAY);
85
86 constexpr float kTextSize = 20;
87
88 std::unique_ptr<SkStreamAsset> distortableStream(
89 GetResourceAsStream("fonts/Distortable.ttf"));
90 if (!distortableStream) {
91 return;
92 }
93
94 SkPoint point = SkPoint::Make(20.0f, 20.0f);
95 SkFourByteTag tag = SkSetFourByteTag('w', 'g', 'h', 't');
96
97 for (int i = 0; i < 10; ++i) {
98 SkScalar styleValue =
99 SkDoubleToScalar(0.5 + i * ((2.0 - 0.5) / 10));
100 SkFontArguments::VariationPosition::Coordinate
101 coordinates[] = {{tag, styleValue}};
102 SkFontArguments::VariationPosition
103 position = {coordinates, std::size(coordinates)};
104
105 SkFont fontStream(
106 fontMgr->makeFromStream(distortableStream->duplicate(),
107 SkFontArguments().setVariationDesignPosition(position)),
108 kTextSize);
109 fontStream.setEdging(SkFont::Edging::kSubpixelAntiAlias);
110
111 SkFont fontClone(
112 typeface->makeClone(SkFontArguments().setVariationDesignPosition(position)), kTextSize);
113 fontClone.setEdging(SkFont::Edging::kSubpixelAntiAlias);
114
115 constexpr char text[] = "abc";
116
117 canvasStream.drawColor(SK_ColorWHITE);
118 canvasStream.drawString(text, point.fX, point.fY, fontStream, paint);
119
120 canvasClone.drawColor(SK_ColorWHITE);
121 canvasClone.drawString(text, point.fX, point.fY, fontClone, paint);
122
123 bool success = bitmap_compare(bitmapStream, bitmapClone);
124 REPORTER_ASSERT(reporter, success);
125 }
126 }
127