summaryrefslogtreecommitdiffstats
path: root/gfx/thebes/gfxAndroidPlatform.cpp
blob: f587737b57164c6136e6ec67afeff039ac562442 (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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set ts=8 sts=4 et sw=4 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "base/basictypes.h"

#include "gfxAndroidPlatform.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/CountingAllocatorBase.h"
#include "mozilla/Preferences.h"

#include "gfx2DGlue.h"
#include "gfxFT2FontList.h"
#include "gfxImageSurface.h"
#include "gfxTextRun.h"
#include "mozilla/dom/ContentChild.h"
#include "nsXULAppAPI.h"
#include "nsIScreen.h"
#include "nsIScreenManager.h"
#include "nsILocaleService.h"
#include "nsServiceManagerUtils.h"
#include "gfxPrefs.h"
#include "cairo.h"
#include "VsyncSource.h"

#include "ft2build.h"
#include FT_FREETYPE_H
#include FT_MODULE_H

using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::gfx;

static FT_Library gPlatformFTLibrary = nullptr;

class FreetypeReporter final : public nsIMemoryReporter,
                               public CountingAllocatorBase<FreetypeReporter>
{
private:
    ~FreetypeReporter() {}

public:
    NS_DECL_ISUPPORTS

    static void* Malloc(FT_Memory, long size)
    {
        return CountingMalloc(size);
    }

    static void Free(FT_Memory, void* p)
    {
        return CountingFree(p);
    }

    static void*
    Realloc(FT_Memory, long cur_size, long new_size, void* p)
    {
        return CountingRealloc(p, new_size);
    }

    NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
                              nsISupports* aData, bool aAnonymize) override
    {
        MOZ_COLLECT_REPORT(
            "explicit/freetype", KIND_HEAP, UNITS_BYTES, MemoryAllocated(),
            "Memory used by Freetype.");

        return NS_OK;
    }
};

NS_IMPL_ISUPPORTS(FreetypeReporter, nsIMemoryReporter)

template<> Atomic<size_t> CountingAllocatorBase<FreetypeReporter>::sAmount(0);

static FT_MemoryRec_ sFreetypeMemoryRecord;

gfxAndroidPlatform::gfxAndroidPlatform()
{
    // A custom allocator.  It counts allocations, enabling memory reporting.
    sFreetypeMemoryRecord.user    = nullptr;
    sFreetypeMemoryRecord.alloc   = FreetypeReporter::Malloc;
    sFreetypeMemoryRecord.free    = FreetypeReporter::Free;
    sFreetypeMemoryRecord.realloc = FreetypeReporter::Realloc;

    // These two calls are equivalent to FT_Init_FreeType(), but allow us to
    // provide a custom memory allocator.
    FT_New_Library(&sFreetypeMemoryRecord, &gPlatformFTLibrary);
    FT_Add_Default_Modules(gPlatformFTLibrary);

    RegisterStrongMemoryReporter(new FreetypeReporter());

    mOffscreenFormat = GetScreenDepth() == 16
                       ? SurfaceFormat::R5G6B5_UINT16
                       : SurfaceFormat::X8R8G8B8_UINT32;

    if (gfxPrefs::AndroidRGB16Force()) {
        mOffscreenFormat = SurfaceFormat::R5G6B5_UINT16;
    }
}

gfxAndroidPlatform::~gfxAndroidPlatform()
{
    FT_Done_Library(gPlatformFTLibrary);
    gPlatformFTLibrary = nullptr;
}

already_AddRefed<gfxASurface>
gfxAndroidPlatform::CreateOffscreenSurface(const IntSize& aSize,
                                           gfxImageFormat aFormat)
{
    if (!Factory::AllowedSurfaceSize(aSize)) {
        return nullptr;
    }

    RefPtr<gfxASurface> newSurface;
    newSurface = new gfxImageSurface(aSize, aFormat);

    return newSurface.forget();
}

static bool
IsJapaneseLocale()
{
    static bool sInitialized = false;
    static bool sIsJapanese = false;

    if (!sInitialized) {
        sInitialized = true;

        do { // to allow 'break' to abandon this block if a call fails
            nsresult rv;
            nsCOMPtr<nsILocaleService> ls =
                do_GetService(NS_LOCALESERVICE_CONTRACTID, &rv);
            if (NS_FAILED(rv)) {
                break;
            }
            nsCOMPtr<nsILocale> appLocale;
            rv = ls->GetApplicationLocale(getter_AddRefs(appLocale));
            if (NS_FAILED(rv)) {
                break;
            }
            nsString localeStr;
            rv = appLocale->
                GetCategory(NS_LITERAL_STRING(NSILOCALE_MESSAGE), localeStr);
            if (NS_FAILED(rv)) {
                break;
            }
            const nsAString& lang = nsDependentSubstring(localeStr, 0, 2);
            if (lang.EqualsLiteral("ja")) {
                sIsJapanese = true;
            }
        } while (false);
    }

    return sIsJapanese;
}

void
gfxAndroidPlatform::GetCommonFallbackFonts(uint32_t aCh, uint32_t aNextCh,
                                           Script aRunScript,
                                           nsTArray<const char*>& aFontList)
{
    static const char kDroidSansJapanese[] = "Droid Sans Japanese";
    static const char kMotoyaLMaru[] = "MotoyaLMaru";
    static const char kNotoSansCJKJP[] = "Noto Sans CJK JP";
    static const char kNotoColorEmoji[] = "Noto Color Emoji";

    if (aNextCh == 0xfe0fu) {
        // if char is followed by VS16, try for a color emoji glyph
        aFontList.AppendElement(kNotoColorEmoji);
    }

    if (!IS_IN_BMP(aCh)) {
        uint32_t p = aCh >> 16;
        if (p == 1) { // try color emoji font, unless VS15 (text style) present
            if (aNextCh != 0xfe0fu && aNextCh != 0xfe0eu) {
                aFontList.AppendElement(kNotoColorEmoji);
            }
        }
    } else {
        // try language-specific "Droid Sans *" and "Noto Sans *" fonts for
        // certain blocks, as most devices probably have these
        uint8_t block = (aCh >> 8) & 0xff;
        switch (block) {
        case 0x05:
            aFontList.AppendElement("Droid Sans Hebrew");
            aFontList.AppendElement("Droid Sans Armenian");
            break;
        case 0x06:
            aFontList.AppendElement("Droid Sans Arabic");
            break;
        case 0x09:
            aFontList.AppendElement("Noto Sans Devanagari");
            aFontList.AppendElement("Droid Sans Devanagari");
            break;
        case 0x0b:
            aFontList.AppendElement("Noto Sans Tamil");
            aFontList.AppendElement("Droid Sans Tamil");
            break;
        case 0x0e:
            aFontList.AppendElement("Noto Sans Thai");
            aFontList.AppendElement("Droid Sans Thai");
            break;
        case 0x10: case 0x2d:
            aFontList.AppendElement("Droid Sans Georgian");
            break;
        case 0x12: case 0x13:
            aFontList.AppendElement("Droid Sans Ethiopic");
            break;
        case 0xf9: case 0xfa:
            if (IsJapaneseLocale()) {
                aFontList.AppendElement(kMotoyaLMaru);
                aFontList.AppendElement(kNotoSansCJKJP);
                aFontList.AppendElement(kDroidSansJapanese);
            }
            break;
        default:
            if (block >= 0x2e && block <= 0x9f && IsJapaneseLocale()) {
                aFontList.AppendElement(kMotoyaLMaru);
                aFontList.AppendElement(kNotoSansCJKJP);
                aFontList.AppendElement(kDroidSansJapanese);
            }
            break;
        }
    }
    // and try Droid Sans Fallback as a last resort
    aFontList.AppendElement("Droid Sans Fallback");
}

void
gfxAndroidPlatform::GetSystemFontList(InfallibleTArray<FontListEntry>* retValue)
{
    gfxFT2FontList::PlatformFontList()->GetSystemFontList(retValue);
}

gfxPlatformFontList*
gfxAndroidPlatform::CreatePlatformFontList()
{
    gfxPlatformFontList* list = new gfxFT2FontList();
    if (NS_SUCCEEDED(list->InitFontList())) {
        return list;
    }
    gfxPlatformFontList::Shutdown();
    return nullptr;
}

bool
gfxAndroidPlatform::IsFontFormatSupported(nsIURI *aFontURI, uint32_t aFormatFlags)
{
    // check for strange format flags
    NS_ASSERTION(!(aFormatFlags & gfxUserFontSet::FLAG_FORMAT_NOT_USED),
                 "strange font format hint set");

    // accept supported formats
    if (aFormatFlags & gfxUserFontSet::FLAG_FORMATS_COMMON) {
        return true;
    }

    // reject all other formats, known and unknown
    if (aFormatFlags != 0) {
        return false;
    }

    // no format hint set, need to look at data
    return true;
}

gfxFontGroup *
gfxAndroidPlatform::CreateFontGroup(const FontFamilyList& aFontFamilyList,
                                    const gfxFontStyle* aStyle,
                                    gfxTextPerfMetrics* aTextPerf,
                                    gfxUserFontSet* aUserFontSet,
                                    gfxFloat aDevToCssSize)
{
    return new gfxFontGroup(aFontFamilyList, aStyle, aTextPerf,
                            aUserFontSet, aDevToCssSize);
}

FT_Library
gfxAndroidPlatform::GetFTLibrary()
{
    return gPlatformFTLibrary;
}

already_AddRefed<ScaledFont>
gfxAndroidPlatform::GetScaledFontForFont(DrawTarget* aTarget, gfxFont *aFont)
{
    return GetScaledFontForFontWithCairoSkia(aTarget, aFont);
}

bool
gfxAndroidPlatform::FontHintingEnabled()
{
    // In "mobile" builds, we sometimes use non-reflow-zoom, so we
    // might not want hinting.  Let's see.

#ifdef MOZ_WIDGET_ANDROID
    // On Android, we currently only use gecko to render web
    // content that can always be be non-reflow-zoomed.  So turn off
    // hinting.
    // 
    // XXX when gecko-android-java is used as an "app runtime", we may
    // want to re-enable hinting for non-browser processes there.
    return false;
#endif //  MOZ_WIDGET_ANDROID

    // Currently, we don't have any other targets, but if/when we do,
    // decide how to handle them here.

    NS_NOTREACHED("oops, what platform is this?");
    return gfxPlatform::FontHintingEnabled();
}

bool
gfxAndroidPlatform::RequiresLinearZoom()
{
#ifdef MOZ_WIDGET_ANDROID
    // On Android, we currently only use gecko to render web
    // content that can always be be non-reflow-zoomed.
    //
    // XXX when gecko-android-java is used as an "app runtime", we may
    // want to treat it like B2G and use linear zoom only for the web
    // browser process, not other apps.
    return true;
#endif

    NS_NOTREACHED("oops, what platform is this?");
    return gfxPlatform::RequiresLinearZoom();
}

already_AddRefed<mozilla::gfx::VsyncSource>
gfxAndroidPlatform::CreateHardwareVsyncSource()
{
    return gfxPlatform::CreateHardwareVsyncSource();
}