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