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
|
/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrAtlas.h"
#include "GrContext.h"
#include "GrGpu.h"
#include "GrRectanizer.h"
#include "GrPlotMgr.h"
#if 0
#define GR_PLOT_WIDTH 8
#define GR_PLOT_HEIGHT 4
#define GR_ATLAS_WIDTH 256
#define GR_ATLAS_HEIGHT 256
#define GR_ATLAS_TEXTURE_WIDTH (GR_PLOT_WIDTH * GR_ATLAS_WIDTH)
#define GR_ATLAS_TEXTURE_HEIGHT (GR_PLOT_HEIGHT * GR_ATLAS_HEIGHT)
#else
#define GR_ATLAS_TEXTURE_WIDTH 1024
#define GR_ATLAS_TEXTURE_HEIGHT 2048
#define GR_ATLAS_WIDTH 341
#define GR_ATLAS_HEIGHT 341
#define GR_PLOT_WIDTH (GR_ATLAS_TEXTURE_WIDTH / GR_ATLAS_WIDTH)
#define GR_PLOT_HEIGHT (GR_ATLAS_TEXTURE_HEIGHT / GR_ATLAS_HEIGHT)
#endif
///////////////////////////////////////////////////////////////////////////////
#define BORDER 1
#ifdef SK_DEBUG
static int gCounter;
#endif
// for testing
#define FONT_CACHE_STATS 0
#if FONT_CACHE_STATS
static int g_UploadCount = 0;
#endif
GrAtlas::GrAtlas(GrAtlasMgr* mgr, int plotX, int plotY, GrMaskFormat format) :
fDrawToken(NULL, 0) {
fAtlasMgr = mgr; // just a pointer, not an owner
fNext = NULL;
fTexture = mgr->getTexture(format); // we're not an owner, just a pointer
fPlot.set(plotX, plotY);
fRects = GrRectanizer::Factory(GR_ATLAS_WIDTH - BORDER,
GR_ATLAS_HEIGHT - BORDER);
fMaskFormat = format;
#ifdef SK_DEBUG
// GrPrintf(" GrAtlas %p [%d %d] %d\n", this, plotX, plotY, gCounter);
gCounter += 1;
#endif
}
GrAtlas::~GrAtlas() {
fAtlasMgr->freePlot(fMaskFormat, fPlot.fX, fPlot.fY);
delete fRects;
#ifdef SK_DEBUG
--gCounter;
// GrPrintf("~GrAtlas %p [%d %d] %d\n", this, fPlot.fX, fPlot.fY, gCounter);
#endif
}
bool GrAtlas::RemoveUnusedAtlases(GrAtlasMgr* atlasMgr, GrAtlas** startAtlas) {
// GrAtlas** is used so that a pointer to the head element can be passed in and
// modified when the first element is deleted
GrAtlas** atlasRef = startAtlas;
GrAtlas* atlas = *startAtlas;
bool removed = false;
while (NULL != atlas) {
if (atlas->drawToken().isIssued()) {
*atlasRef = atlas->fNext;
atlasMgr->deleteAtlas(atlas);
atlas = *atlasRef;
removed = true;
} else {
atlasRef = &atlas->fNext;
atlas = atlas->fNext;
}
}
return removed;
}
static void adjustForPlot(GrIPoint16* loc, const GrIPoint16& plot) {
loc->fX += plot.fX * GR_ATLAS_WIDTH;
loc->fY += plot.fY * GR_ATLAS_HEIGHT;
}
static uint8_t* zerofill(uint8_t* ptr, int count) {
while (--count >= 0) {
*ptr++ = 0;
}
return ptr;
}
bool GrAtlas::addSubImage(int width, int height, const void* image,
GrIPoint16* loc) {
if (!fRects->addRect(width + BORDER, height + BORDER, loc)) {
return false;
}
SkAutoSMalloc<1024> storage;
int dstW = width + 2*BORDER;
int dstH = height + 2*BORDER;
if (BORDER) {
const int bpp = GrMaskFormatBytesPerPixel(fMaskFormat);
const size_t dstRB = dstW * bpp;
uint8_t* dst = (uint8_t*)storage.reset(dstH * dstRB);
Gr_bzero(dst, dstRB); // zero top row
dst += dstRB;
for (int y = 0; y < height; y++) {
dst = zerofill(dst, bpp); // zero left edge
memcpy(dst, image, width * bpp);
dst += width * bpp;
dst = zerofill(dst, bpp); // zero right edge
image = (const void*)((const char*)image + width * bpp);
}
Gr_bzero(dst, dstRB); // zero bottom row
image = storage.get();
}
adjustForPlot(loc, fPlot);
GrContext* context = fTexture->getContext();
// We pass the flag that does not force a flush. We assume our caller is
// smart and hasn't referenced the part of the texture we're about to update
// since the last flush.
context->writeTexturePixels(fTexture,
loc->fX, loc->fY, dstW, dstH,
fTexture->config(), image, 0,
GrContext::kDontFlush_PixelOpsFlag);
// now tell the caller to skip the top/left BORDER
loc->fX += BORDER;
loc->fY += BORDER;
#if FONT_CACHE_STATS
++g_UploadCount;
#endif
return true;
}
///////////////////////////////////////////////////////////////////////////////
GrAtlasMgr::GrAtlasMgr(GrGpu* gpu) {
fGpu = gpu;
gpu->ref();
Gr_bzero(fTexture, sizeof(fTexture));
fPlotMgr = SkNEW_ARGS(GrPlotMgr, (GR_PLOT_WIDTH, GR_PLOT_HEIGHT));
}
GrAtlasMgr::~GrAtlasMgr() {
for (size_t i = 0; i < GR_ARRAY_COUNT(fTexture); i++) {
SkSafeUnref(fTexture[i]);
}
delete fPlotMgr;
fGpu->unref();
#if FONT_CACHE_STATS
GrPrintf("Num uploads: %d\n", g_UploadCount);
#endif
}
static GrPixelConfig maskformat2pixelconfig(GrMaskFormat format) {
switch (format) {
case kA8_GrMaskFormat:
return kAlpha_8_GrPixelConfig;
case kA565_GrMaskFormat:
return kRGB_565_GrPixelConfig;
case kA888_GrMaskFormat:
return kSkia8888_GrPixelConfig;
default:
SkDEBUGFAIL("unknown maskformat");
}
return kUnknown_GrPixelConfig;
}
GrAtlas* GrAtlasMgr::addToAtlas(GrAtlas** atlas,
int width, int height, const void* image,
GrMaskFormat format,
GrIPoint16* loc) {
SkASSERT(NULL == *atlas || (*atlas)->getMaskFormat() == format);
// iterate through entire atlas list, see if we can find a hole
GrAtlas* atlasIter = *atlas;
while (atlasIter) {
if (atlasIter->addSubImage(width, height, image, loc)) {
return atlasIter;
}
atlasIter = atlasIter->fNext;
}
// If the above fails, then either we have no starting atlas, or the current
// atlas list is full. Either way we need to allocate a new atlas
GrIPoint16 plot;
if (!fPlotMgr->newPlot(&plot)) {
return NULL;
}
SkASSERT(0 == kA8_GrMaskFormat);
SkASSERT(1 == kA565_GrMaskFormat);
if (NULL == fTexture[format]) {
// TODO: Update this to use the cache rather than directly creating a texture.
GrTextureDesc desc;
desc.fFlags = kDynamicUpdate_GrTextureFlagBit;
desc.fWidth = GR_ATLAS_TEXTURE_WIDTH;
desc.fHeight = GR_ATLAS_TEXTURE_HEIGHT;
desc.fConfig = maskformat2pixelconfig(format);
fTexture[format] = fGpu->createTexture(desc, NULL, 0);
if (NULL == fTexture[format]) {
return NULL;
}
}
GrAtlas* newAtlas = SkNEW_ARGS(GrAtlas, (this, plot.fX, plot.fY, format));
if (!newAtlas->addSubImage(width, height, image, loc)) {
delete newAtlas;
return NULL;
}
// new atlas, put at head
newAtlas->fNext = *atlas;
*atlas = newAtlas;
return newAtlas;
}
void GrAtlasMgr::freePlot(GrMaskFormat format, int x, int y) {
SkASSERT(fPlotMgr->isBusy(x, y));
fPlotMgr->freePlot(x, y);
}
|