reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame^] | 1 | #include "SkTestImageFilters.h" |
| 2 | #include "SkCanvas.h" |
| 3 | |
| 4 | bool SkOffsetImageFilter::onFilterImage(const SkBitmap& src, |
| 5 | const SkMatrix& matrix, |
| 6 | SkBitmap* result, |
| 7 | SkIPoint* loc) { |
| 8 | SkVector vec; |
| 9 | matrix.mapVectors(&vec, &fOffset, 1); |
| 10 | |
| 11 | loc->fX += SkScalarRoundToInt(vec.fX); |
| 12 | loc->fY += SkScalarRoundToInt(vec.fY); |
| 13 | *result = src; |
| 14 | return true; |
| 15 | } |
| 16 | |
| 17 | bool SkOffsetImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, |
| 18 | SkIRect* dst) { |
| 19 | SkVector vec; |
| 20 | ctm.mapVectors(&vec, &fOffset, 1); |
| 21 | |
| 22 | *dst = src; |
| 23 | dst->offset(SkScalarRoundToInt(vec.fX), SkScalarRoundToInt(vec.fY)); |
| 24 | return true; |
| 25 | } |
| 26 | |
| 27 | void SkOffsetImageFilter::flatten(SkFlattenableWriteBuffer& buffer) { |
| 28 | this->INHERITED::flatten(buffer); |
| 29 | buffer.writeScalar(fOffset.x()); |
| 30 | buffer.writeScalar(fOffset.y()); |
| 31 | } |
| 32 | |
| 33 | SkOffsetImageFilter::SkOffsetImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 34 | fOffset.fX = buffer.readScalar(); |
| 35 | fOffset.fY = buffer.readScalar(); |
| 36 | } |
| 37 | |
| 38 | SkFlattenable::Factory SkOffsetImageFilter::getFactory() { |
| 39 | return CreateProc; |
| 40 | } |
| 41 | |
| 42 | /////////////////////////////////////////////////////////////////////////////// |
| 43 | |
| 44 | SkComposeImageFilter::~SkComposeImageFilter() { |
| 45 | SkSafeUnref(fInner); |
| 46 | SkSafeUnref(fOuter); |
| 47 | } |
| 48 | |
| 49 | bool SkComposeImageFilter::onFilterImage(const SkBitmap& src, |
| 50 | const SkMatrix& ctm, |
| 51 | SkBitmap* result, |
| 52 | SkIPoint* loc) { |
| 53 | if (!fOuter && !fInner) { |
| 54 | return false; |
| 55 | } |
| 56 | |
| 57 | if (!fOuter || !fInner) { |
| 58 | return (fOuter ? fOuter : fInner)->filterImage(src, ctm, result, loc); |
| 59 | } |
| 60 | |
| 61 | SkBitmap tmp; |
| 62 | return fInner->filterImage(src, ctm, &tmp, loc) && |
| 63 | fOuter->filterImage(tmp, ctm, result, loc); |
| 64 | } |
| 65 | |
| 66 | bool SkComposeImageFilter::onFilterBounds(const SkIRect& src, |
| 67 | const SkMatrix& ctm, |
| 68 | SkIRect* dst) { |
| 69 | if (!fOuter && !fInner) { |
| 70 | return false; |
| 71 | } |
| 72 | |
| 73 | if (!fOuter || !fInner) { |
| 74 | return (fOuter ? fOuter : fInner)->filterBounds(src, ctm, dst); |
| 75 | } |
| 76 | |
| 77 | SkIRect tmp; |
| 78 | return fInner->filterBounds(src, ctm, &tmp) && |
| 79 | fOuter->filterBounds(tmp, ctm, dst); |
| 80 | } |
| 81 | |
| 82 | void SkComposeImageFilter::flatten(SkFlattenableWriteBuffer& buffer) { |
| 83 | this->INHERITED::flatten(buffer); |
| 84 | |
| 85 | buffer.writeFlattenable(fOuter); |
| 86 | buffer.writeFlattenable(fInner); |
| 87 | } |
| 88 | |
| 89 | SkComposeImageFilter::SkComposeImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 90 | fOuter = (SkImageFilter*)buffer.readFlattenable(); |
| 91 | fInner = (SkImageFilter*)buffer.readFlattenable(); |
| 92 | } |
| 93 | |
| 94 | SkFlattenable::Factory SkComposeImageFilter::getFactory() { |
| 95 | return CreateProc; |
| 96 | } |
| 97 | |
| 98 | /////////////////////////////////////////////////////////////////////////////// |
| 99 | |
| 100 | template <typename T> T* SkSafeRefReturn(T* obj) { |
| 101 | SkSafeRef(obj); |
| 102 | return obj; |
| 103 | } |
| 104 | |
| 105 | void SkMergeImageFilter::initAlloc(int count, bool hasModes) { |
| 106 | if (count < 1) { |
| 107 | fFilters = NULL; |
| 108 | fModes = NULL; |
| 109 | fCount = 0; |
| 110 | } else { |
| 111 | int modeCount = hasModes ? count : 0; |
| 112 | size_t size = sizeof(SkImageFilter*) * count + sizeof(uint8_t) * modeCount; |
| 113 | if (size <= sizeof(fStorage)) { |
| 114 | fFilters = SkTCast<SkImageFilter**>(fStorage); |
| 115 | } else { |
| 116 | fFilters = SkTCast<SkImageFilter**>(sk_malloc_throw(size)); |
| 117 | } |
| 118 | fModes = hasModes ? SkTCast<uint8_t*>(fFilters + count) : NULL; |
| 119 | fCount = count; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | void SkMergeImageFilter::init(SkImageFilter* const filters[], int count, |
| 124 | const SkXfermode::Mode modes[]) { |
| 125 | this->initAlloc(count, !!modes); |
| 126 | for (int i = 0; i < count; ++i) { |
| 127 | fFilters[i] = SkSafeRefReturn(filters[i]); |
| 128 | if (modes) { |
| 129 | fModes[i] = SkToU8(modes[i]); |
| 130 | } |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | SkMergeImageFilter::SkMergeImageFilter(SkImageFilter* first, SkImageFilter* second, |
| 135 | SkXfermode::Mode mode) { |
| 136 | SkImageFilter* filters[] = { first, second }; |
| 137 | SkXfermode::Mode modes[] = { mode, mode }; |
| 138 | this->init(filters, 2, SkXfermode::kSrcOver_Mode == mode ? NULL : modes); |
| 139 | } |
| 140 | |
| 141 | SkMergeImageFilter::SkMergeImageFilter(SkImageFilter* const filters[], int count, |
| 142 | const SkXfermode::Mode modes[]) { |
| 143 | this->init(filters, count, modes); |
| 144 | } |
| 145 | |
| 146 | SkMergeImageFilter::~SkMergeImageFilter() { |
| 147 | for (int i = 0; i < fCount; ++i) { |
| 148 | SkSafeUnref(fFilters[i]); |
| 149 | } |
| 150 | |
| 151 | if (fFilters != SkTCast<SkImageFilter**>(fStorage)) { |
| 152 | sk_free(fFilters); |
| 153 | // fModes is allocated in the same block as fFilters, so no need to |
| 154 | // separately free it. |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | bool SkMergeImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, |
| 159 | SkIRect* dst) { |
| 160 | if (fCount < 1) { |
| 161 | return false; |
| 162 | } |
| 163 | |
| 164 | SkIRect totalBounds; |
| 165 | |
| 166 | for (int i = 0; i < fCount; ++i) { |
| 167 | SkImageFilter* filter = fFilters[i]; |
| 168 | SkIRect r; |
| 169 | if (filter) { |
| 170 | if (!filter->filterBounds(src, ctm, &r)) { |
| 171 | return false; |
| 172 | } |
| 173 | } else { |
| 174 | r = src; |
| 175 | } |
| 176 | if (0 == i) { |
| 177 | totalBounds = r; |
| 178 | } else { |
| 179 | totalBounds.join(r); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | // don't modify dst until now, so we don't accidentally change it in the |
| 184 | // loop, but then return false on the next filter. |
| 185 | *dst = totalBounds; |
| 186 | return true; |
| 187 | } |
| 188 | |
| 189 | bool SkMergeImageFilter::onFilterImage(const SkBitmap& src, const SkMatrix& ctm, |
| 190 | SkBitmap* result, SkIPoint* loc) { |
| 191 | if (fCount < 1) { |
| 192 | return false; |
| 193 | } |
| 194 | |
| 195 | const SkIRect srcBounds = SkIRect::MakeXYWH(loc->x(), loc->y(), |
| 196 | src.width(), src.height()); |
| 197 | SkIRect bounds; |
| 198 | if (!this->filterBounds(srcBounds, ctm, &bounds)) { |
| 199 | return false; |
| 200 | } |
| 201 | |
| 202 | const int x0 = bounds.left(); |
| 203 | const int y0 = bounds.top(); |
| 204 | |
| 205 | SkBitmap dst; |
| 206 | dst.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), bounds.height()); |
| 207 | dst.allocPixels(); |
| 208 | dst.eraseColor(0); |
| 209 | |
| 210 | SkCanvas canvas(dst); |
| 211 | SkPaint paint; |
| 212 | |
| 213 | for (int i = 0; i < fCount; ++i) { |
| 214 | SkBitmap tmp; |
| 215 | const SkBitmap* srcPtr; |
| 216 | SkIPoint pos = *loc; |
| 217 | SkImageFilter* filter = fFilters[i]; |
| 218 | if (filter) { |
| 219 | if (!filter->filterImage(src, ctm, &tmp, &pos)) { |
| 220 | return false; |
| 221 | } |
| 222 | srcPtr = &tmp; |
| 223 | } else { |
| 224 | srcPtr = &src; |
| 225 | } |
| 226 | |
| 227 | if (fModes) { |
| 228 | paint.setXfermodeMode((SkXfermode::Mode)fModes[i]); |
| 229 | } else { |
| 230 | paint.setXfermode(NULL); |
| 231 | } |
| 232 | canvas.drawSprite(*srcPtr, pos.x() - x0, pos.y() - y0, &paint); |
| 233 | } |
| 234 | |
| 235 | loc->set(bounds.left(), bounds.top()); |
| 236 | result->swap(dst); |
| 237 | return true; |
| 238 | } |
| 239 | |
| 240 | void SkMergeImageFilter::flatten(SkFlattenableWriteBuffer& buffer) { |
| 241 | this->INHERITED::flatten(buffer); |
| 242 | |
| 243 | int storedCount = fCount; |
| 244 | if (fModes) { |
| 245 | // negative count signals we have modes |
| 246 | storedCount = -storedCount; |
| 247 | } |
| 248 | buffer.write32(storedCount); |
| 249 | |
| 250 | if (fCount) { |
| 251 | for (int i = 0; i < fCount; ++i) { |
| 252 | buffer.writeFlattenable(fFilters[i]); |
| 253 | } |
| 254 | if (fModes) { |
| 255 | buffer.write(fModes, fCount * sizeof(fModes[0])); |
| 256 | } |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | SkMergeImageFilter::SkMergeImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 261 | int storedCount = buffer.readS32(); |
| 262 | this->initAlloc(SkAbs32(storedCount), storedCount < 0); |
| 263 | |
| 264 | for (int i = 0; i < fCount; ++i) { |
| 265 | fFilters[i] = (SkImageFilter*)buffer.readFlattenable(); |
| 266 | } |
| 267 | |
| 268 | if (fModes) { |
| 269 | SkASSERT(storedCount < 0); |
| 270 | buffer.read(fModes, fCount * sizeof(fModes[0])); |
| 271 | } else { |
| 272 | SkASSERT(storedCount >= 0); |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | SkFlattenable::Factory SkMergeImageFilter::getFactory() { |
| 277 | return CreateProc; |
| 278 | } |
| 279 | |
| 280 | /////////////////////////////////////////////////////////////////////////////// |
| 281 | |
| 282 | #include "SkColorFilter.h" |
| 283 | |
| 284 | SkColorFilterImageFilter::~SkColorFilterImageFilter() { |
| 285 | SkSafeUnref(fColorFilter); |
| 286 | } |
| 287 | |
| 288 | bool SkColorFilterImageFilter::onFilterImage(const SkBitmap& src, |
| 289 | const SkMatrix& matrix, |
| 290 | SkBitmap* result, |
| 291 | SkIPoint* loc) { |
| 292 | if (SkBitmap::kARGB_8888_Config != src.config()) { |
| 293 | return false; |
| 294 | } |
| 295 | |
| 296 | SkColorFilter* cf = fColorFilter; |
| 297 | if (NULL == cf) { |
| 298 | *result = src; |
| 299 | return true; |
| 300 | } |
| 301 | |
| 302 | SkAutoLockPixels alpsrc(src); |
| 303 | if (!src.readyToDraw()) { |
| 304 | return false; |
| 305 | } |
| 306 | |
| 307 | SkBitmap dst(src); |
| 308 | dst.allocPixels(); |
| 309 | if (!dst.readyToDraw()) { |
| 310 | return false; |
| 311 | } |
| 312 | |
| 313 | for (int y = 0; y < src.height(); ++y) { |
| 314 | cf->filterSpan(src.getAddr32(0, y), src.width(), dst.getAddr32(0, y)); |
| 315 | } |
| 316 | |
| 317 | result->swap(dst); |
| 318 | return true; |
| 319 | } |
| 320 | |
| 321 | void SkColorFilterImageFilter::flatten(SkFlattenableWriteBuffer& buffer) { |
| 322 | this->INHERITED::flatten(buffer); |
| 323 | |
| 324 | buffer.writeFlattenable(fColorFilter); |
| 325 | } |
| 326 | |
| 327 | SkColorFilterImageFilter::SkColorFilterImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 328 | fColorFilter = (SkColorFilter*)buffer.readFlattenable(); |
| 329 | } |
| 330 | |
| 331 | SkFlattenable::Factory SkColorFilterImageFilter::getFactory() { |
| 332 | return CreateProc; |
| 333 | } |
| 334 | |
| 335 | /////////////////////////////////////////////////////////////////////////////// |
| 336 | |
| 337 | bool SkDownSampleImageFilter::onFilterImage(const SkBitmap& src, |
| 338 | const SkMatrix& matrix, |
| 339 | SkBitmap* result, SkIPoint*) { |
| 340 | SkScalar scale = fScale; |
| 341 | if (scale > SK_Scalar1 || scale <= 0) { |
| 342 | return false; |
| 343 | } |
| 344 | |
| 345 | int dstW = SkScalarRoundToInt(src.width() * scale); |
| 346 | int dstH = SkScalarRoundToInt(src.height() * scale); |
| 347 | if (dstW < 1) { |
| 348 | dstW = 1; |
| 349 | } |
| 350 | if (dstH < 1) { |
| 351 | dstH = 1; |
| 352 | } |
| 353 | |
| 354 | SkBitmap dst; |
| 355 | dst.setConfig(SkBitmap::kARGB_8888_Config, dstW, dstH); |
| 356 | dst.allocPixels(); |
| 357 | dst.eraseColor(0); |
| 358 | |
| 359 | // downsample |
| 360 | { |
| 361 | SkPaint paint; |
| 362 | paint.setFilterBitmap(true); |
| 363 | |
| 364 | SkCanvas canvas(dst); |
| 365 | canvas.scale(scale, scale); |
| 366 | canvas.drawBitmap(src, 0, 0, &paint); |
| 367 | } |
| 368 | |
| 369 | result->setConfig(SkBitmap::kARGB_8888_Config, src.width(), src.height()); |
| 370 | result->allocPixels(); |
| 371 | result->eraseColor(0); |
| 372 | |
| 373 | // upscale |
| 374 | { |
| 375 | SkRect r = SkRect::MakeWH(SkIntToScalar(result->width()), |
| 376 | SkIntToScalar(result->height())); |
| 377 | SkCanvas canvas(*result); |
| 378 | canvas.drawBitmapRect(dst, NULL, r, NULL); |
| 379 | } |
| 380 | return true; |
| 381 | } |
| 382 | |
| 383 | void SkDownSampleImageFilter::flatten(SkFlattenableWriteBuffer& buffer) { |
| 384 | this->INHERITED::flatten(buffer); |
| 385 | |
| 386 | buffer.writeScalar(fScale); |
| 387 | } |
| 388 | |
| 389 | SkDownSampleImageFilter::SkDownSampleImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 390 | fScale = buffer.readScalar(); |
| 391 | } |
| 392 | |
| 393 | SkFlattenable::Factory SkDownSampleImageFilter::getFactory() { |
| 394 | return CreateProc; |
| 395 | } |
| 396 | |