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Side by Side Diff: skia/sgl/SkBitmapProcState.cpp

Issue 113827: Remove the remainder of the skia source code from the Chromium repo.... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 11 years, 7 months ago
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1 #include "SkBitmapProcState.h"
2 #include "SkColorPriv.h"
3 #include "SkFilterProc.h"
4 #include "SkPaint.h"
5 #include "SkShader.h" // for tilemodes
6
7 #ifdef SK_CPU_BENDIAN
8 #define UNPACK_PRIMARY_SHORT(packed) ((uint32_t)(packed) >> 16)
9 #define UNPACK_SECONDARY_SHORT(packed) ((packed) & 0xFFFF)
10 #else
11 #define UNPACK_PRIMARY_SHORT(packed) ((packed) & 0xFFFF)
12 #define UNPACK_SECONDARY_SHORT(packed) ((uint32_t)(packed) >> 16)
13 #endif
14
15 static inline SkPMColor Filter_32(unsigned x, unsigned y,
16 SkPMColor a00, SkPMColor a01,
17 SkPMColor a10, SkPMColor a11) {
18 SkASSERT((unsigned)x <= 0xF);
19 SkASSERT((unsigned)y <= 0xF);
20
21 int xy = x * y;
22 uint32_t mask = gMask_00FF00FF; //0xFF00FF;
23
24 int scale = 256 - 16*y - 16*x + xy;
25 uint32_t lo = (a00 & mask) * scale;
26 uint32_t hi = ((a00 >> 8) & mask) * scale;
27
28 scale = 16*x - xy;
29 lo += (a01 & mask) * scale;
30 hi += ((a01 >> 8) & mask) * scale;
31
32 scale = 16*y - xy;
33 lo += (a10 & mask) * scale;
34 hi += ((a10 >> 8) & mask) * scale;
35
36 lo += (a11 & mask) * xy;
37 hi += ((a11 >> 8) & mask) * xy;
38
39 return ((lo >> 8) & mask) | (hi & ~mask);
40 }
41
42 // returns expanded * 5bits
43 static inline uint32_t Filter_565_Expanded(unsigned x, unsigned y,
44 uint32_t a00, uint32_t a01,
45 uint32_t a10, uint32_t a11) {
46 SkASSERT((unsigned)x <= 0xF);
47 SkASSERT((unsigned)y <= 0xF);
48
49 a00 = SkExpand_rgb_16(a00);
50 a01 = SkExpand_rgb_16(a01);
51 a10 = SkExpand_rgb_16(a10);
52 a11 = SkExpand_rgb_16(a11);
53
54 int xy = x * y >> 3;
55 return a00 * (32 - 2*y - 2*x + xy) +
56 a01 * (2*x - xy) +
57 a10 * (2*y - xy) +
58 a11 * xy;
59 }
60
61 // turn an expanded 565 * 5bits into SkPMColor
62 // g:11 | r:10 | x:1 | b:10
63 static inline SkPMColor SkExpanded_565_To_PMColor(uint32_t c) {
64 unsigned r = (c >> 13) & 0xFF;
65 unsigned g = (c >> 24);
66 unsigned b = (c >> 2) & 0xFF;
67 return SkPackARGB32(0xFF, r, g, b);
68 }
69
70 // returns answer in SkPMColor format
71 static inline SkPMColor Filter_4444_D32(unsigned x, unsigned y,
72 uint32_t a00, uint32_t a01,
73 uint32_t a10, uint32_t a11) {
74 SkASSERT((unsigned)x <= 0xF);
75 SkASSERT((unsigned)y <= 0xF);
76
77 a00 = SkExpand_4444(a00);
78 a01 = SkExpand_4444(a01);
79 a10 = SkExpand_4444(a10);
80 a11 = SkExpand_4444(a11);
81
82 int xy = x * y >> 4;
83 uint32_t result = a00 * (16 - y - x + xy) +
84 a01 * (x - xy) +
85 a10 * (y - xy) +
86 a11 * xy;
87
88 return SkCompact_8888(result);
89 }
90
91 static inline U8CPU Filter_8(unsigned x, unsigned y,
92 U8CPU a00, U8CPU a01,
93 U8CPU a10, U8CPU a11) {
94 SkASSERT((unsigned)x <= 0xF);
95 SkASSERT((unsigned)y <= 0xF);
96
97 int xy = x * y;
98 unsigned result = a00 * (256 - 16*y - 16*x + xy) +
99 a01 * (16*x - xy) +
100 a10 * (16*y - xy) +
101 a11 * xy;
102
103 return result >> 8;
104 }
105
106 /*****************************************************************************
107 *
108 * D32 functions
109 *
110 */
111
112 // SRC == 8888
113
114 #define FILTER_PROC(x, y, a, b, c, d) Filter_32(x, y, a, b, c, d)
115
116 #define MAKENAME(suffix) S32_opaque_D32 ## suffix
117 #define DSTSIZE 32
118 #define SRCTYPE SkPMColor
119 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kA RGB_8888_Config); \
120 SkASSERT(state.fAlphaScale == 256)
121 #define RETURNDST(src) src
122 #define SRC_TO_FILTER(src) src
123 #define FILTER_TO_DST(c) c
124 #include "SkBitmapProcState_sample.h"
125
126 #define MAKENAME(suffix) S32_alpha_D32 ## suffix
127 #define DSTSIZE 32
128 #define SRCTYPE SkPMColor
129 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kA RGB_8888_Config); \
130 SkASSERT(state.fAlphaScale < 256)
131 #define PREAMBLE(state) unsigned scale = state.fAlphaScale
132 #define RETURNDST(src) SkAlphaMulQ(src, scale)
133 #define SRC_TO_FILTER(src) src
134 #define FILTER_TO_DST(c) SkAlphaMulQ(c, scale)
135 #include "SkBitmapProcState_sample.h"
136
137 // SRC == 565
138
139 #undef FILTER_PROC
140 #define FILTER_PROC(x, y, a, b, c, d) Filter_565_Expanded(x, y, a, b, c, d)
141
142 #define MAKENAME(suffix) S16_opaque_D32 ## suffix
143 #define DSTSIZE 32
144 #define SRCTYPE uint16_t
145 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kR GB_565_Config); \
146 SkASSERT(state.fAlphaScale == 256)
147 #define RETURNDST(src) SkPixel16ToPixel32(src)
148 #define SRC_TO_FILTER(src) src
149 #define FILTER_TO_DST(c) SkExpanded_565_To_PMColor(c)
150 #include "SkBitmapProcState_sample.h"
151
152 #define MAKENAME(suffix) S16_alpha_D32 ## suffix
153 #define DSTSIZE 32
154 #define SRCTYPE uint16_t
155 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kR GB_565_Config); \
156 SkASSERT(state.fAlphaScale < 256)
157 #define PREAMBLE(state) unsigned scale = state.fAlphaScale
158 #define RETURNDST(src) SkAlphaMulQ(SkPixel16ToPixel32(src), scale)
159 #define SRC_TO_FILTER(src) src
160 #define FILTER_TO_DST(c) SkAlphaMulQ(SkExpanded_565_To_PMColor(c), scale)
161 #include "SkBitmapProcState_sample.h"
162
163 // SRC == Index8
164
165 #undef FILTER_PROC
166 #define FILTER_PROC(x, y, a, b, c, d) Filter_32(x, y, a, b, c, d)
167
168 #define MAKENAME(suffix) SI8_opaque_D32 ## suffix
169 #define DSTSIZE 32
170 #define SRCTYPE uint8_t
171 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kI ndex8_Config); \
172 SkASSERT(state.fAlphaScale == 256)
173 #define PREAMBLE(state) const SkPMColor* SK_RESTRICT table = state.fBitm ap->getColorTable()->lockColors()
174 #define RETURNDST(src) table[src]
175 #define SRC_TO_FILTER(src) table[src]
176 #define FILTER_TO_DST(c) c
177 #define POSTAMBLE(state) state.fBitmap->getColorTable()->unlockColors(fal se)
178 #include "SkBitmapProcState_sample.h"
179
180 #define MAKENAME(suffix) SI8_alpha_D32 ## suffix
181 #define DSTSIZE 32
182 #define SRCTYPE uint8_t
183 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kI ndex8_Config); \
184 SkASSERT(state.fAlphaScale < 256)
185 #define PREAMBLE(state) unsigned scale = state.fAlphaScale; \
186 const SkPMColor* SK_RESTRICT table = state.fBitm ap->getColorTable()->lockColors()
187 #define RETURNDST(src) SkAlphaMulQ(table[src], scale)
188 #define SRC_TO_FILTER(src) table[src]
189 #define FILTER_TO_DST(c) SkAlphaMulQ(c, scale)
190 #define POSTAMBLE(state) state.fBitmap->getColorTable()->unlockColors(fal se)
191 #include "SkBitmapProcState_sample.h"
192
193 // SRC == 4444
194
195 #undef FILTER_PROC
196 #define FILTER_PROC(x, y, a, b, c, d) Filter_4444_D32(x, y, a, b, c, d)
197
198 #define MAKENAME(suffix) S4444_opaque_D32 ## suffix
199 #define DSTSIZE 32
200 #define SRCTYPE SkPMColor16
201 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kA RGB_4444_Config); \
202 SkASSERT(state.fAlphaScale == 256)
203 #define RETURNDST(src) SkPixel4444ToPixel32(src)
204 #define SRC_TO_FILTER(src) src
205 #define FILTER_TO_DST(c) c
206 #include "SkBitmapProcState_sample.h"
207
208 #define MAKENAME(suffix) S4444_alpha_D32 ## suffix
209 #define DSTSIZE 32
210 #define SRCTYPE SkPMColor16
211 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kA RGB_4444_Config); \
212 SkASSERT(state.fAlphaScale < 256)
213 #define PREAMBLE(state) unsigned scale = state.fAlphaScale
214 #define RETURNDST(src) SkAlphaMulQ(SkPixel4444ToPixel32(src), scale)
215 #define SRC_TO_FILTER(src) src
216 #define FILTER_TO_DST(c) SkAlphaMulQ(c, scale)
217 #include "SkBitmapProcState_sample.h"
218
219 // SRC == A8
220
221 #undef FILTER_PROC
222 #define FILTER_PROC(x, y, a, b, c, d) Filter_8(x, y, a, b, c, d)
223
224 #define MAKENAME(suffix) SA8_alpha_D32 ## suffix
225 #define DSTSIZE 32
226 #define SRCTYPE uint8_t
227 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kA 8_Config); \
228 SkASSERT(state.fAlphaScale == 256)
229 #define PREAMBLE(state) const SkPMColor pmColor = state.fPaintPMColor;
230 #define RETURNDST(src) SkAlphaMulQ(pmColor, SkAlpha255To256(src))
231 #define SRC_TO_FILTER(src) src
232 #define FILTER_TO_DST(c) SkAlphaMulQ(pmColor, SkAlpha255To256(c))
233 #include "SkBitmapProcState_sample.h"
234
235 /*****************************************************************************
236 *
237 * D16 functions
238 *
239 */
240
241 // SRC == 8888
242
243 #undef FILTER_PROC
244 #define FILTER_PROC(x, y, a, b, c, d) Filter_32(x, y, a, b, c, d)
245
246 #define MAKENAME(suffix) S32_D16 ## suffix
247 #define DSTSIZE 16
248 #define SRCTYPE SkPMColor
249 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kA RGB_8888_Config); \
250 SkASSERT(state.fBitmap->isOpaque())
251 #define RETURNDST(src) SkPixel32ToPixel16(src)
252 #define SRC_TO_FILTER(src) src
253 #define FILTER_TO_DST(c) SkPixel32ToPixel16(c)
254 #include "SkBitmapProcState_sample.h"
255
256 // SRC == 565
257
258 #undef FILTER_PROC
259 #define FILTER_PROC(x, y, a, b, c, d) Filter_565_Expanded(x, y, a, b, c, d)
260
261 #define MAKENAME(suffix) S16_D16 ## suffix
262 #define DSTSIZE 16
263 #define SRCTYPE uint16_t
264 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kR GB_565_Config)
265 #define RETURNDST(src) src
266 #define SRC_TO_FILTER(src) src
267 #define FILTER_TO_DST(c) SkCompact_rgb_16((c) >> 5)
268 #include "SkBitmapProcState_sample.h"
269
270 // SRC == Index8
271
272 #undef FILTER_PROC
273 #define FILTER_PROC(x, y, a, b, c, d) Filter_565_Expanded(x, y, a, b, c, d)
274
275 #define MAKENAME(suffix) SI8_D16 ## suffix
276 #define DSTSIZE 16
277 #define SRCTYPE uint8_t
278 #define CHECKSTATE(state) SkASSERT(state.fBitmap->config() == SkBitmap::kI ndex8_Config); \
279 SkASSERT(state.fBitmap->isOpaque())
280 #define PREAMBLE(state) const uint16_t* SK_RESTRICT table = state.fBitma p->getColorTable()->lock16BitCache()
281 #define RETURNDST(src) table[src]
282 #define SRC_TO_FILTER(src) table[src]
283 #define FILTER_TO_DST(c) SkCompact_rgb_16(c >> 5)
284 #define POSTAMBLE(state) state.fBitmap->getColorTable()->unlock16BitCache ()
285 #include "SkBitmapProcState_sample.h"
286
287 static bool valid_for_filtering(unsigned dimension) {
288 // for filtering, width and height must fit in 14bits, since we use steal
289 // 2 bits from each to store our 4bit subpixel data
290 return (dimension & ~0x3FFF) == 0;
291 }
292
293 bool SkBitmapProcState::chooseProcs(const SkMatrix& inv, const SkPaint& paint) {
294 if (fOrigBitmap.width() == 0 || fOrigBitmap.height() == 0) {
295 return false;
296 }
297 const SkMatrix* m;
298
299 if (inv.getType() <= SkMatrix::kTranslate_Mask ||
300 (SkShader::kClamp_TileMode == fTileModeX &&
301 SkShader::kClamp_TileMode == fTileModeY)) {
302 m = &inv;
303 } else {
304 fUnitInvMatrix = inv;
305 fUnitInvMatrix.postIDiv(fOrigBitmap.width(), fOrigBitmap.height());
306 m = &fUnitInvMatrix;
307 }
308
309 fBitmap = &fOrigBitmap;
310 #ifdef SK_SUPPORT_MIPMAP
311 if (fOrigBitmap.hasMipMap()) {
312 int shift = fOrigBitmap.extractMipLevel(&fMipBitmap,
313 SkScalarToFixed(m->getScaleX()),
314 SkScalarToFixed(m->getSkewY()));
315
316 if (shift > 0) {
317 if (m != &fUnitInvMatrix) {
318 fUnitInvMatrix = *m;
319 m = &fUnitInvMatrix;
320 }
321
322 SkScalar scale = SkFixedToScalar(SK_Fixed1 >> shift);
323 fUnitInvMatrix.postScale(scale, scale);
324
325 // now point here instead of fOrigBitmap
326 fBitmap = &fMipBitmap;
327 }
328 }
329 #endif
330
331 fInvMatrix = m;
332 fInvProc = m->getMapXYProc();
333 fInvType = m->getType();
334 fInvSx = SkScalarToFixed(m->getScaleX());
335 fInvSy = SkScalarToFixed(m->getScaleY());
336 fInvKy = SkScalarToFixed(m->getSkewY());
337 fInvTxPlusHalf = SkScalarToFixed(m->getTranslateX()) + (fInvSx >> 1);
338 fInvTyPlusHalf = SkScalarToFixed(m->getTranslateY()) + (fInvSy >> 1);
339
340 /* the -1 keeps us symetric with general policy for rounding, which is
341 (x + 1/2) >> 16. This sends exact halves to the next large pixel
342 e.g. x==3.5, round(x) == 4. However, our state is working with the
343 inverse matrix, and so to match the result of "normal" rounding, we
344 subtract 1 so that we in effect behave the same at the half-way point.
345 To compare, try drawing a bitmap with y == exact-half using the sprite
346 blitters and with us. Without the -1, we will draw the colors a whole
347 pixel shifted up (yikes).
348 */
349 fInvTxPlusHalf -= 1;
350 fInvTyPlusHalf -= 1;
351
352 fAlphaScale = SkAlpha255To256(paint.getAlpha());
353
354 // pick-up filtering from the paint, but only if the matrix is
355 // more complex than identity/translate (i.e. no need to pay the cost
356 // of filtering if we're not scaled etc.).
357 // note: we explicitly check inv, since m might be scaled due to unitinv
358 // trickery, but we don't want to see that for this test
359 fDoFilter = paint.isFilterBitmap() &&
360 (inv.getType() > SkMatrix::kTranslate_Mask &&
361 valid_for_filtering(fBitmap->width() | fBitmap->height()));
362
363 fMatrixProc = this->chooseMatrixProc();
364 if (NULL == fMatrixProc) {
365 return false;
366 }
367
368 ///////////////////////////////////////////////////////////////////////
369
370 int index = 0;
371 if (fAlphaScale < 256) { // note: this distinction is not used for D16
372 index |= 1;
373 }
374 if (fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask)) {
375 index |= 2;
376 }
377 if (fDoFilter) {
378 index |= 4;
379 }
380 // bits 3,4,5 encoding the source bitmap format
381 switch (fBitmap->config()) {
382 case SkBitmap::kARGB_8888_Config:
383 index |= 0;
384 break;
385 case SkBitmap::kRGB_565_Config:
386 index |= 8;
387 break;
388 case SkBitmap::kIndex8_Config:
389 index |= 16;
390 break;
391 case SkBitmap::kARGB_4444_Config:
392 index |= 24;
393 break;
394 case SkBitmap::kA8_Config:
395 index |= 32;
396 fPaintPMColor = SkPreMultiplyColor(paint.getColor());
397 default:
398 return false;
399 }
400
401 static const SampleProc32 gSample32[] = {
402 S32_opaque_D32_nofilter_DXDY,
403 S32_alpha_D32_nofilter_DXDY,
404 S32_opaque_D32_nofilter_DX,
405 S32_alpha_D32_nofilter_DX,
406 S32_opaque_D32_filter_DXDY,
407 S32_alpha_D32_filter_DXDY,
408 S32_opaque_D32_filter_DX,
409 S32_alpha_D32_filter_DX,
410
411 S16_opaque_D32_nofilter_DXDY,
412 S16_alpha_D32_nofilter_DXDY,
413 S16_opaque_D32_nofilter_DX,
414 S16_alpha_D32_nofilter_DX,
415 S16_opaque_D32_filter_DXDY,
416 S16_alpha_D32_filter_DXDY,
417 S16_opaque_D32_filter_DX,
418 S16_alpha_D32_filter_DX,
419
420 SI8_opaque_D32_nofilter_DXDY,
421 SI8_alpha_D32_nofilter_DXDY,
422 SI8_opaque_D32_nofilter_DX,
423 SI8_alpha_D32_nofilter_DX,
424 SI8_opaque_D32_filter_DXDY,
425 SI8_alpha_D32_filter_DXDY,
426 SI8_opaque_D32_filter_DX,
427 SI8_alpha_D32_filter_DX,
428
429 S4444_opaque_D32_nofilter_DXDY,
430 S4444_alpha_D32_nofilter_DXDY,
431 S4444_opaque_D32_nofilter_DX,
432 S4444_alpha_D32_nofilter_DX,
433 S4444_opaque_D32_filter_DXDY,
434 S4444_alpha_D32_filter_DXDY,
435 S4444_opaque_D32_filter_DX,
436 S4444_alpha_D32_filter_DX,
437
438 // A8 treats alpha/opauqe the same (equally efficient)
439 SA8_alpha_D32_nofilter_DXDY,
440 SA8_alpha_D32_nofilter_DXDY,
441 SA8_alpha_D32_nofilter_DX,
442 SA8_alpha_D32_nofilter_DX,
443 SA8_alpha_D32_filter_DXDY,
444 SA8_alpha_D32_filter_DXDY,
445 SA8_alpha_D32_filter_DX,
446 SA8_alpha_D32_filter_DX
447 };
448
449 static const SampleProc16 gSample16[] = {
450 S32_D16_nofilter_DXDY,
451 S32_D16_nofilter_DX,
452 S32_D16_filter_DXDY,
453 S32_D16_filter_DX,
454
455 S16_D16_nofilter_DXDY,
456 S16_D16_nofilter_DX,
457 S16_D16_filter_DXDY,
458 S16_D16_filter_DX,
459
460 SI8_D16_nofilter_DXDY,
461 SI8_D16_nofilter_DX,
462 SI8_D16_filter_DXDY,
463 SI8_D16_filter_DX,
464
465 // Don't support 4444 -> 565
466 NULL, NULL, NULL, NULL,
467 // Don't support A8 -> 565
468 NULL, NULL, NULL, NULL
469 };
470
471 fSampleProc32 = gSample32[index];
472 index >>= 1; // shift away any opaque/alpha distinction
473 fSampleProc16 = gSample16[index];
474
475 return true;
476 }
477
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