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
|
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "gfxGlyphExtents.h"
#include "gfxTextRun.h"
using namespace mozilla;
#ifdef DEBUG_roc
# define DEBUG_TEXT_RUN_STORAGE_METRICS
#endif
#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
extern uint32_t gTextRunStorageHighWaterMark;
extern uint32_t gTextRunStorage;
extern uint32_t gFontCount;
extern uint32_t gGlyphExtentsCount;
extern uint32_t gGlyphExtentsWidthsTotalSize;
extern uint32_t gGlyphExtentsSetupEagerSimple;
extern uint32_t gGlyphExtentsSetupEagerTight;
extern uint32_t gGlyphExtentsSetupLazyTight;
extern uint32_t gGlyphExtentsSetupFallBackToTight;
#endif
gfxGlyphExtents::~gfxGlyphExtents() {
#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
gGlyphExtentsWidthsTotalSize +=
mContainedGlyphWidths.SizeOfExcludingThis(&FontCacheMallocSizeOf);
gGlyphExtentsCount++;
#endif
MOZ_COUNT_DTOR(gfxGlyphExtents);
}
bool gfxGlyphExtents::GetTightGlyphExtentsAppUnitsLocked(
gfxFont* aFont, DrawTarget* aDrawTarget, uint32_t aGlyphID,
gfxRect* aExtents) {
HashEntry* entry = mTightGlyphExtents.GetEntry(aGlyphID);
if (!entry) {
// Some functions higher up in the call chain deliberately pass in a
// nullptr DrawTarget, e.g. GetBaselinePosition() passes nullptr to
// gfxTextRun::MeasureText() and that nullptr reaches here.
if (!aDrawTarget) {
NS_WARNING("Could not get glyph extents (no aDrawTarget)");
return false;
}
#ifdef DEBUG_TEXT_RUN_STORAGE_METRICS
++gGlyphExtentsSetupLazyTight;
#endif
// We need to temporarily release the read lock, as SetupGlyphExtents will
// take a write lock internally when it wants to set the new entry.
MOZ_PUSH_IGNORE_THREAD_SAFETY
mLock.ReadUnlock();
aFont->SetupGlyphExtents(aDrawTarget, aGlyphID, true, this);
mLock.ReadLock();
MOZ_POP_THREAD_SAFETY
entry = mTightGlyphExtents.GetEntry(aGlyphID);
if (!entry) {
NS_WARNING("Could not get glyph extents");
return false;
}
}
*aExtents = gfxRect(entry->x, entry->y, entry->width, entry->height);
return true;
}
gfxGlyphExtents::GlyphWidths::~GlyphWidths() {
uint32_t i, count = mBlocks.Length();
for (i = 0; i < count; ++i) {
uintptr_t bits = mBlocks[i];
if (bits && !(bits & 0x1)) {
delete[] reinterpret_cast<uint16_t*>(bits);
}
}
}
uint32_t gfxGlyphExtents::GlyphWidths::SizeOfExcludingThis(
MallocSizeOf aMallocSizeOf) const {
uint32_t i;
uint32_t size = mBlocks.ShallowSizeOfExcludingThis(aMallocSizeOf);
for (i = 0; i < mBlocks.Length(); ++i) {
uintptr_t bits = mBlocks[i];
if (bits && !(bits & 0x1)) {
size += aMallocSizeOf(reinterpret_cast<void*>(bits));
}
}
return size;
}
void gfxGlyphExtents::GlyphWidths::Set(uint32_t aGlyphID, uint16_t aWidth) {
uint32_t block = aGlyphID >> BLOCK_SIZE_BITS;
uint32_t len = mBlocks.Length();
if (block >= len) {
uintptr_t* elems = mBlocks.AppendElements(block + 1 - len);
if (!elems) return;
memset(elems, 0, sizeof(uintptr_t) * (block + 1 - len));
}
uintptr_t bits = mBlocks[block];
uint32_t glyphOffset = aGlyphID & (BLOCK_SIZE - 1);
if (!bits) {
mBlocks[block] = MakeSingle(glyphOffset, aWidth);
return;
}
uint16_t* newBlock;
if (bits & 0x1) {
// Expand the block to a real block. We could avoid this by checking
// glyphOffset == GetGlyphOffset(bits), but that never happens so don't
// bother
newBlock = new uint16_t[BLOCK_SIZE];
if (!newBlock) return;
uint32_t i;
for (i = 0; i < BLOCK_SIZE; ++i) {
newBlock[i] = INVALID_WIDTH;
}
newBlock[GetGlyphOffset(bits)] = GetWidth(bits);
mBlocks[block] = reinterpret_cast<uintptr_t>(newBlock);
} else {
newBlock = reinterpret_cast<uint16_t*>(bits);
}
newBlock[glyphOffset] = aWidth;
}
void gfxGlyphExtents::SetTightGlyphExtents(uint32_t aGlyphID,
const gfxRect& aExtentsAppUnits) {
AutoWriteLock lock(mLock);
HashEntry* entry = mTightGlyphExtents.PutEntry(aGlyphID);
if (!entry) {
return;
}
entry->x = aExtentsAppUnits.X();
entry->y = aExtentsAppUnits.Y();
entry->width = aExtentsAppUnits.Width();
entry->height = aExtentsAppUnits.Height();
}
size_t gfxGlyphExtents::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
AutoReadLock lock(mLock);
return mContainedGlyphWidths.SizeOfExcludingThis(aMallocSizeOf) +
mTightGlyphExtents.ShallowSizeOfExcludingThis(aMallocSizeOf);
}
size_t gfxGlyphExtents::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
|
