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