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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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