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
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
|
/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBitmapSampler.h"
static SkTileModeProc get_tilemode_proc(SkShader::TileMode mode)
{
switch (mode) {
case SkShader::kClamp_TileMode:
return do_clamp;
case SkShader::kRepeat_TileMode:
return do_repeat_mod;
case SkShader::kMirror_TileMode:
return do_mirror_mod;
default:
SkDEBUGFAIL("unknown mode");
return NULL;
}
}
SkBitmapSampler::SkBitmapSampler(const SkBitmap& bm, bool filter,
SkShader::TileMode tmx, SkShader::TileMode tmy)
: fBitmap(bm), fFilterBitmap(filter), fTileModeX(tmx), fTileModeY(tmy)
{
SkASSERT(bm.width() > 0 && bm.height() > 0);
fMaxX = SkToU16(bm.width() - 1);
fMaxY = SkToU16(bm.height() - 1);
fTileProcX = get_tilemode_proc(tmx);
fTileProcY = get_tilemode_proc(tmy);
}
void SkBitmapSampler::setPaint(const SkPaint& paint)
{
}
class SkNullBitmapSampler : public SkBitmapSampler {
public:
SkNullBitmapSampler(const SkBitmap& bm, bool filter,
SkShader::TileMode tmx, SkShader::TileMode tmy)
: SkBitmapSampler(bm, filter, tmx, tmy) {}
virtual SkPMColor sample(SkFixed x, SkFixed y) const { return 0; }
};
/////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////
#define BITMAP_CLASSNAME_PREFIX(name) ARGB32##name
#define BITMAP_PIXEL_TO_PMCOLOR(bitmap, x, y) *bitmap.getAddr32(x, y)
#include "SkBitmapSamplerTemplate.h"
#include "SkColorPriv.h"
#define BITMAP_CLASSNAME_PREFIX(name) RGB16##name
#define BITMAP_PIXEL_TO_PMCOLOR(bitmap, x, y) SkPixel16ToPixel32(*bitmap.getAddr16(x, y))
#include "SkBitmapSamplerTemplate.h"
#define BITMAP_CLASSNAME_PREFIX(name) Index8##name
#define BITMAP_PIXEL_TO_PMCOLOR(bitmap, x, y) bitmap.getIndex8Color(x, y)
#include "SkBitmapSamplerTemplate.h"
/////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////
///////////////// The Bilinear versions
#include "SkFilterProc.h"
class ARGB32_Bilinear_Sampler : public SkBitmapSampler {
public:
ARGB32_Bilinear_Sampler(const SkBitmap& bm, SkShader::TileMode tmx, SkShader::TileMode tmy)
: SkBitmapSampler(bm, true, tmx, tmy)
{
fPtrProcTable = SkGetBilinearFilterPtrProcTable();
}
virtual SkPMColor sample(SkFixed x, SkFixed y) const
{
const uint32_t *p00, *p01, *p10, *p11;
// turn pixel centers into the top-left of our filter-box
x -= SK_FixedHalf;
y -= SK_FixedHalf;
// compute our pointers
{
const SkBitmap* bitmap = &fBitmap;
int ix = x >> 16;
int iy = y >> 16;
int maxX = fMaxX;
SkTileModeProc procX = fTileProcX;
int maxY = fMaxY;
SkTileModeProc procY = fTileProcY;
int tmpx = procX(ix, maxX);
int tmpy = procY(iy, maxY);
p00 = bitmap->getAddr32(tmpx, tmpy);
int tmpx1 = procX(ix + 1, maxX);
p01 = bitmap->getAddr32(tmpx1, tmpy);
int tmpy1 = procY(iy + 1, maxY);
p10 = bitmap->getAddr32(tmpx, tmpy1);
p11 = bitmap->getAddr32(tmpx1, tmpy1);
}
SkFilterPtrProc proc = SkGetBilinearFilterPtrProc(fPtrProcTable, x, y);
return proc(p00, p01, p10, p11);
}
private:
const SkFilterPtrProc* fPtrProcTable;
};
class RGB16_Bilinear_Sampler : public SkBitmapSampler {
public:
RGB16_Bilinear_Sampler(const SkBitmap& bm, SkShader::TileMode tmx, SkShader::TileMode tmy)
: SkBitmapSampler(bm, true, tmx, tmy)
{
fProcTable = SkGetBilinearFilterProcTable();
}
virtual SkPMColor sample(SkFixed x, SkFixed y) const
{
const uint16_t *p00, *p01, *p10, *p11;
// turn pixel centers into the top-left of our filter-box
x -= SK_FixedHalf;
y -= SK_FixedHalf;
// compute our pointers
{
const SkBitmap* bitmap = &fBitmap;
int ix = x >> 16;
int iy = y >> 16;
int maxX = fMaxX;
SkTileModeProc procX = fTileProcX;
int maxY = fMaxY;
SkTileModeProc procY = fTileProcY;
int tmpx = procX(ix, maxX);
int tmpy = procY(iy, maxY);
p00 = bitmap->getAddr16(tmpx, tmpy);
int tmpx1 = procX(ix + 1, maxX);
p01 = bitmap->getAddr16(tmpx1, tmpy);
int tmpy1 = procY(iy + 1, maxY);
p10 = bitmap->getAddr16(tmpx, tmpy1);
p11 = bitmap->getAddr16(tmpx1, tmpy1);
}
SkFilterProc proc = SkGetBilinearFilterProc(fProcTable, x, y);
uint32_t c = proc(SkExpand_rgb_16(*p00), SkExpand_rgb_16(*p01),
SkExpand_rgb_16(*p10), SkExpand_rgb_16(*p11));
return SkPixel16ToPixel32((uint16_t)SkCompact_rgb_16(c));
}
private:
const SkFilterProc* fProcTable;
};
// If we had a init/term method on sampler, we could avoid the per-pixel
// call to lockColors/unlockColors
class Index8_Bilinear_Sampler : public SkBitmapSampler {
public:
Index8_Bilinear_Sampler(const SkBitmap& bm, SkShader::TileMode tmx, SkShader::TileMode tmy)
: SkBitmapSampler(bm, true, tmx, tmy)
{
fPtrProcTable = SkGetBilinearFilterPtrProcTable();
}
virtual SkPMColor sample(SkFixed x, SkFixed y) const
{
const SkBitmap* bitmap = &fBitmap;
const uint8_t *p00, *p01, *p10, *p11;
// turn pixel centers into the top-left of our filter-box
x -= SK_FixedHalf;
y -= SK_FixedHalf;
// compute our pointers
{
int ix = x >> 16;
int iy = y >> 16;
int maxX = fMaxX;
SkTileModeProc procX = fTileProcX;
int maxY = fMaxY;
SkTileModeProc procY = fTileProcY;
int tmpx = procX(ix, maxX);
int tmpy = procY(iy, maxY);
p00 = bitmap->getAddr8(tmpx, tmpy);
int tmpx1 = procX(ix + 1, maxX);
p01 = bitmap->getAddr8(tmpx1, tmpy);
int tmpy1 = procY(iy + 1, maxY);
p10 = bitmap->getAddr8(tmpx, tmpy1);
p11 = bitmap->getAddr8(tmpx1, tmpy1);
}
const SkPMColor* colors = bitmap->getColorTable()->lockColors();
SkFilterPtrProc proc = SkGetBilinearFilterPtrProc(fPtrProcTable, x, y);
uint32_t c = proc(&colors[*p00], &colors[*p01], &colors[*p10], &colors[*p11]);
bitmap->getColorTable()->unlockColors(false);
return c;
}
private:
const SkFilterPtrProc* fPtrProcTable;
};
class A8_Bilinear_Sampler : public SkBitmapSampler {
public:
A8_Bilinear_Sampler(const SkBitmap& bm, SkShader::TileMode tmx, SkShader::TileMode tmy)
: SkBitmapSampler(bm, true, tmx, tmy)
, fColor(0)
{
fProcTable = SkGetBilinearFilterProcTable();
}
virtual void setPaint(const SkPaint& paint)
{
fColor = SkPreMultiplyColor(paint.getColor());
}
virtual SkPMColor sample(SkFixed x, SkFixed y) const
{
const uint8_t *p00, *p01, *p10, *p11;
// turn pixel centers into the top-left of our filter-box
x -= SK_FixedHalf;
y -= SK_FixedHalf;
// compute our pointers
{
const SkBitmap* bitmap = &fBitmap;
int ix = x >> 16;
int iy = y >> 16;
int maxX = fMaxX;
SkTileModeProc procX = fTileProcX;
int maxY = fMaxY;
SkTileModeProc procY = fTileProcY;
int tmpx = procX(ix, maxX);
int tmpy = procY(iy, maxY);
p00 = bitmap->getAddr8(tmpx, tmpy);
int tmpx1 = procX(ix + 1, maxX);
p01 = bitmap->getAddr8(tmpx1, tmpy);
int tmpy1 = procY(iy + 1, maxY);
p10 = bitmap->getAddr8(tmpx, tmpy1);
p11 = bitmap->getAddr8(tmpx1, tmpy1);
}
SkFilterProc proc = SkGetBilinearFilterProc(fProcTable, x, y);
int alpha = proc(*p00, *p01, *p10, *p11);
return SkAlphaMulQ(fColor, SkAlpha255To256(alpha));
}
private:
const SkFilterProc* fProcTable;
SkPMColor fColor;
};
class A8_NoFilter_Sampler : public SkBitmapSampler {
public:
A8_NoFilter_Sampler(const SkBitmap& bm, SkShader::TileMode tmx, SkShader::TileMode tmy)
: SkBitmapSampler(bm, false, tmx, tmy)
, fProcTable(NULL)
{
}
virtual void setPaint(const SkPaint& paint)
{
fColor = SkPreMultiplyColor(paint.getColor());
}
virtual SkPMColor sample(SkFixed x, SkFixed y) const
{
int ix = SkFixedFloor(x);
int iy = SkFixedFloor(y);
int alpha = *fBitmap.getAddr8(fTileProcX(ix, fMaxX), fTileProcY(iy, fMaxY));
return SkAlphaMulQ(fColor, SkAlpha255To256(alpha));
}
private:
const SkFilterProc* fProcTable;
SkPMColor fColor;
};
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
SkBitmapSampler* SkBitmapSampler::Create(const SkBitmap& bm, bool doFilter,
SkShader::TileMode tmx,
SkShader::TileMode tmy)
{
switch (bm.getConfig()) {
case SkBitmap::kARGB_8888_Config:
if (doFilter)
return SkNEW_ARGS(ARGB32_Bilinear_Sampler, (bm, tmx, tmy));
if (tmx == tmy) {
switch (tmx) {
case SkShader::kClamp_TileMode:
return SkNEW_ARGS(ARGB32_Point_Clamp_Sampler, (bm));
case SkShader::kRepeat_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(ARGB32_Point_Repeat_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(ARGB32_Point_Repeat_Mod_Sampler, (bm));
case SkShader::kMirror_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(ARGB32_Point_Mirror_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(ARGB32_Point_Mirror_Mod_Sampler, (bm));
default:
SkDEBUGFAIL("unknown mode");
}
}
else { // tmx != tmy
return SkNEW_ARGS(ARGB32_Point_Sampler, (bm, tmx, tmy));
}
break;
case SkBitmap::kRGB_565_Config:
if (doFilter)
return SkNEW_ARGS(RGB16_Bilinear_Sampler, (bm, tmx, tmy));
if (tmx == tmy) {
switch (tmx) {
case SkShader::kClamp_TileMode:
return SkNEW_ARGS(RGB16_Point_Clamp_Sampler, (bm));
case SkShader::kRepeat_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(RGB16_Point_Repeat_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(RGB16_Point_Repeat_Mod_Sampler, (bm));
case SkShader::kMirror_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(RGB16_Point_Mirror_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(RGB16_Point_Mirror_Mod_Sampler, (bm));
default:
SkDEBUGFAIL("unknown mode");
}
}
else { // tmx != tmy
return SkNEW_ARGS(RGB16_Point_Sampler, (bm, tmx, tmy));
}
break;
case SkBitmap::kIndex8_Config:
if (doFilter)
return SkNEW_ARGS(Index8_Bilinear_Sampler, (bm, tmx, tmy));
if (tmx == tmy) {
switch (tmx) {
case SkShader::kClamp_TileMode:
return SkNEW_ARGS(Index8_Point_Clamp_Sampler, (bm));
case SkShader::kRepeat_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(Index8_Point_Repeat_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(Index8_Point_Repeat_Mod_Sampler, (bm));
case SkShader::kMirror_TileMode:
if (is_pow2(bm.width()) && is_pow2(bm.height()))
return SkNEW_ARGS(Index8_Point_Mirror_Pow2_Sampler, (bm));
else
return SkNEW_ARGS(Index8_Point_Mirror_Mod_Sampler, (bm));
default:
SkDEBUGFAIL("unknown mode");
}
}
else { // tmx != tmy
return SkNEW_ARGS(Index8_Point_Sampler, (bm, tmx, tmy));
}
break;
case SkBitmap::kA8_Config:
if (doFilter)
return SkNEW_ARGS(A8_Bilinear_Sampler, (bm, tmx, tmy));
else
return SkNEW_ARGS(A8_NoFilter_Sampler, (bm, tmx, tmy));
break;
default:
SkDEBUGFAIL("unknown device");
}
return SkNEW_ARGS(SkNullBitmapSampler, (bm, doFilter, tmx, tmy));
}
|
