reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 1 | #include "SkTestImageFilters.h" |
| 2 | #include "SkCanvas.h" |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 3 | #include "SkDevice.h" |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 4 | |
reed@google.com | e763951 | 2012-08-07 14:25:44 +0000 | [diff] [blame^] | 5 | // Simple helper canvas that "takes ownership" of the provided device, so that |
| 6 | // when this canvas goes out of scope, so will its device. Could be replaced |
| 7 | // with the following: |
| 8 | // |
| 9 | // SkCanvas canvas(device); |
| 10 | // SkAutoTUnref<SkDevice> aur(device); |
| 11 | // |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 12 | class OwnDeviceCanvas : public SkCanvas { |
| 13 | public: |
| 14 | OwnDeviceCanvas(SkDevice* device) : SkCanvas(device) { |
| 15 | SkSafeUnref(device); |
| 16 | } |
| 17 | }; |
| 18 | |
| 19 | bool SkOffsetImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src, |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 20 | const SkMatrix& matrix, |
| 21 | SkBitmap* result, |
| 22 | SkIPoint* loc) { |
| 23 | SkVector vec; |
| 24 | matrix.mapVectors(&vec, &fOffset, 1); |
| 25 | |
| 26 | loc->fX += SkScalarRoundToInt(vec.fX); |
| 27 | loc->fY += SkScalarRoundToInt(vec.fY); |
| 28 | *result = src; |
| 29 | return true; |
| 30 | } |
| 31 | |
| 32 | bool SkOffsetImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, |
| 33 | SkIRect* dst) { |
| 34 | SkVector vec; |
| 35 | ctm.mapVectors(&vec, &fOffset, 1); |
| 36 | |
| 37 | *dst = src; |
| 38 | dst->offset(SkScalarRoundToInt(vec.fX), SkScalarRoundToInt(vec.fY)); |
| 39 | return true; |
| 40 | } |
| 41 | |
djsollen@google.com | 5492424 | 2012-03-29 15:18:04 +0000 | [diff] [blame] | 42 | void SkOffsetImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 43 | this->INHERITED::flatten(buffer); |
| 44 | buffer.writeScalar(fOffset.x()); |
| 45 | buffer.writeScalar(fOffset.y()); |
| 46 | } |
| 47 | |
| 48 | SkOffsetImageFilter::SkOffsetImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 49 | fOffset.fX = buffer.readScalar(); |
| 50 | fOffset.fY = buffer.readScalar(); |
| 51 | } |
| 52 | |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 53 | /////////////////////////////////////////////////////////////////////////////// |
| 54 | |
| 55 | SkComposeImageFilter::~SkComposeImageFilter() { |
| 56 | SkSafeUnref(fInner); |
| 57 | SkSafeUnref(fOuter); |
| 58 | } |
| 59 | |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 60 | bool SkComposeImageFilter::onFilterImage(Proxy* proxy, |
| 61 | const SkBitmap& src, |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 62 | const SkMatrix& ctm, |
| 63 | SkBitmap* result, |
| 64 | SkIPoint* loc) { |
| 65 | if (!fOuter && !fInner) { |
| 66 | return false; |
| 67 | } |
| 68 | |
| 69 | if (!fOuter || !fInner) { |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 70 | return (fOuter ? fOuter : fInner)->filterImage(proxy, src, ctm, result, loc); |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | SkBitmap tmp; |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 74 | return fInner->filterImage(proxy, src, ctm, &tmp, loc) && |
| 75 | fOuter->filterImage(proxy, tmp, ctm, result, loc); |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | bool SkComposeImageFilter::onFilterBounds(const SkIRect& src, |
| 79 | const SkMatrix& ctm, |
| 80 | SkIRect* dst) { |
| 81 | if (!fOuter && !fInner) { |
| 82 | return false; |
| 83 | } |
| 84 | |
| 85 | if (!fOuter || !fInner) { |
| 86 | return (fOuter ? fOuter : fInner)->filterBounds(src, ctm, dst); |
| 87 | } |
| 88 | |
| 89 | SkIRect tmp; |
| 90 | return fInner->filterBounds(src, ctm, &tmp) && |
| 91 | fOuter->filterBounds(tmp, ctm, dst); |
| 92 | } |
| 93 | |
djsollen@google.com | 5492424 | 2012-03-29 15:18:04 +0000 | [diff] [blame] | 94 | void SkComposeImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 95 | this->INHERITED::flatten(buffer); |
| 96 | |
| 97 | buffer.writeFlattenable(fOuter); |
| 98 | buffer.writeFlattenable(fInner); |
| 99 | } |
| 100 | |
| 101 | SkComposeImageFilter::SkComposeImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 102 | fOuter = (SkImageFilter*)buffer.readFlattenable(); |
| 103 | fInner = (SkImageFilter*)buffer.readFlattenable(); |
| 104 | } |
| 105 | |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 106 | /////////////////////////////////////////////////////////////////////////////// |
| 107 | |
| 108 | template <typename T> T* SkSafeRefReturn(T* obj) { |
| 109 | SkSafeRef(obj); |
| 110 | return obj; |
| 111 | } |
| 112 | |
| 113 | void SkMergeImageFilter::initAlloc(int count, bool hasModes) { |
| 114 | if (count < 1) { |
| 115 | fFilters = NULL; |
| 116 | fModes = NULL; |
| 117 | fCount = 0; |
| 118 | } else { |
| 119 | int modeCount = hasModes ? count : 0; |
| 120 | size_t size = sizeof(SkImageFilter*) * count + sizeof(uint8_t) * modeCount; |
| 121 | if (size <= sizeof(fStorage)) { |
| 122 | fFilters = SkTCast<SkImageFilter**>(fStorage); |
| 123 | } else { |
| 124 | fFilters = SkTCast<SkImageFilter**>(sk_malloc_throw(size)); |
| 125 | } |
| 126 | fModes = hasModes ? SkTCast<uint8_t*>(fFilters + count) : NULL; |
| 127 | fCount = count; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | void SkMergeImageFilter::init(SkImageFilter* const filters[], int count, |
| 132 | const SkXfermode::Mode modes[]) { |
| 133 | this->initAlloc(count, !!modes); |
| 134 | for (int i = 0; i < count; ++i) { |
| 135 | fFilters[i] = SkSafeRefReturn(filters[i]); |
| 136 | if (modes) { |
| 137 | fModes[i] = SkToU8(modes[i]); |
| 138 | } |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | SkMergeImageFilter::SkMergeImageFilter(SkImageFilter* first, SkImageFilter* second, |
| 143 | SkXfermode::Mode mode) { |
| 144 | SkImageFilter* filters[] = { first, second }; |
| 145 | SkXfermode::Mode modes[] = { mode, mode }; |
| 146 | this->init(filters, 2, SkXfermode::kSrcOver_Mode == mode ? NULL : modes); |
| 147 | } |
| 148 | |
| 149 | SkMergeImageFilter::SkMergeImageFilter(SkImageFilter* const filters[], int count, |
| 150 | const SkXfermode::Mode modes[]) { |
| 151 | this->init(filters, count, modes); |
| 152 | } |
| 153 | |
| 154 | SkMergeImageFilter::~SkMergeImageFilter() { |
| 155 | for (int i = 0; i < fCount; ++i) { |
| 156 | SkSafeUnref(fFilters[i]); |
| 157 | } |
| 158 | |
| 159 | if (fFilters != SkTCast<SkImageFilter**>(fStorage)) { |
| 160 | sk_free(fFilters); |
| 161 | // fModes is allocated in the same block as fFilters, so no need to |
| 162 | // separately free it. |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | bool SkMergeImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, |
| 167 | SkIRect* dst) { |
| 168 | if (fCount < 1) { |
| 169 | return false; |
| 170 | } |
| 171 | |
| 172 | SkIRect totalBounds; |
| 173 | |
| 174 | for (int i = 0; i < fCount; ++i) { |
| 175 | SkImageFilter* filter = fFilters[i]; |
| 176 | SkIRect r; |
| 177 | if (filter) { |
| 178 | if (!filter->filterBounds(src, ctm, &r)) { |
| 179 | return false; |
| 180 | } |
| 181 | } else { |
| 182 | r = src; |
| 183 | } |
| 184 | if (0 == i) { |
| 185 | totalBounds = r; |
| 186 | } else { |
| 187 | totalBounds.join(r); |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | // don't modify dst until now, so we don't accidentally change it in the |
| 192 | // loop, but then return false on the next filter. |
| 193 | *dst = totalBounds; |
| 194 | return true; |
| 195 | } |
| 196 | |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 197 | bool SkMergeImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src, |
| 198 | const SkMatrix& ctm, |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 199 | SkBitmap* result, SkIPoint* loc) { |
| 200 | if (fCount < 1) { |
| 201 | return false; |
| 202 | } |
| 203 | |
| 204 | const SkIRect srcBounds = SkIRect::MakeXYWH(loc->x(), loc->y(), |
| 205 | src.width(), src.height()); |
| 206 | SkIRect bounds; |
| 207 | if (!this->filterBounds(srcBounds, ctm, &bounds)) { |
| 208 | return false; |
| 209 | } |
| 210 | |
| 211 | const int x0 = bounds.left(); |
| 212 | const int y0 = bounds.top(); |
| 213 | |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 214 | SkDevice* dst = proxy->createDevice(bounds.width(), bounds.height()); |
| 215 | if (NULL == dst) { |
| 216 | return false; |
| 217 | } |
| 218 | OwnDeviceCanvas canvas(dst); |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 219 | SkPaint paint; |
| 220 | |
| 221 | for (int i = 0; i < fCount; ++i) { |
| 222 | SkBitmap tmp; |
| 223 | const SkBitmap* srcPtr; |
| 224 | SkIPoint pos = *loc; |
| 225 | SkImageFilter* filter = fFilters[i]; |
| 226 | if (filter) { |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 227 | if (!filter->filterImage(proxy, src, ctm, &tmp, &pos)) { |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 228 | return false; |
| 229 | } |
| 230 | srcPtr = &tmp; |
| 231 | } else { |
| 232 | srcPtr = &src; |
| 233 | } |
| 234 | |
| 235 | if (fModes) { |
| 236 | paint.setXfermodeMode((SkXfermode::Mode)fModes[i]); |
| 237 | } else { |
| 238 | paint.setXfermode(NULL); |
| 239 | } |
| 240 | canvas.drawSprite(*srcPtr, pos.x() - x0, pos.y() - y0, &paint); |
| 241 | } |
| 242 | |
| 243 | loc->set(bounds.left(), bounds.top()); |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 244 | *result = dst->accessBitmap(false); |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 245 | return true; |
| 246 | } |
| 247 | |
djsollen@google.com | 5492424 | 2012-03-29 15:18:04 +0000 | [diff] [blame] | 248 | void SkMergeImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 249 | this->INHERITED::flatten(buffer); |
| 250 | |
| 251 | int storedCount = fCount; |
| 252 | if (fModes) { |
| 253 | // negative count signals we have modes |
| 254 | storedCount = -storedCount; |
| 255 | } |
| 256 | buffer.write32(storedCount); |
| 257 | |
| 258 | if (fCount) { |
| 259 | for (int i = 0; i < fCount; ++i) { |
| 260 | buffer.writeFlattenable(fFilters[i]); |
| 261 | } |
| 262 | if (fModes) { |
| 263 | buffer.write(fModes, fCount * sizeof(fModes[0])); |
| 264 | } |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | SkMergeImageFilter::SkMergeImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 269 | int storedCount = buffer.readS32(); |
| 270 | this->initAlloc(SkAbs32(storedCount), storedCount < 0); |
| 271 | |
| 272 | for (int i = 0; i < fCount; ++i) { |
| 273 | fFilters[i] = (SkImageFilter*)buffer.readFlattenable(); |
| 274 | } |
| 275 | |
| 276 | if (fModes) { |
| 277 | SkASSERT(storedCount < 0); |
| 278 | buffer.read(fModes, fCount * sizeof(fModes[0])); |
| 279 | } else { |
| 280 | SkASSERT(storedCount >= 0); |
| 281 | } |
| 282 | } |
| 283 | |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 284 | /////////////////////////////////////////////////////////////////////////////// |
| 285 | |
| 286 | #include "SkColorFilter.h" |
| 287 | |
| 288 | SkColorFilterImageFilter::~SkColorFilterImageFilter() { |
| 289 | SkSafeUnref(fColorFilter); |
| 290 | } |
| 291 | |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 292 | bool SkColorFilterImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src, |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 293 | const SkMatrix& matrix, |
| 294 | SkBitmap* result, |
| 295 | SkIPoint* loc) { |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 296 | SkColorFilter* cf = fColorFilter; |
| 297 | if (NULL == cf) { |
| 298 | *result = src; |
| 299 | return true; |
| 300 | } |
| 301 | |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 302 | SkDevice* dev = proxy->createDevice(src.width(), src.height()); |
| 303 | if (NULL == dev) { |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 304 | return false; |
| 305 | } |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 306 | OwnDeviceCanvas canvas(dev); |
| 307 | SkPaint paint; |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 308 | |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 309 | paint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| 310 | paint.setColorFilter(fColorFilter); |
| 311 | canvas.drawSprite(src, 0, 0, &paint); |
| 312 | |
| 313 | *result = dev->accessBitmap(false); |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 314 | return true; |
| 315 | } |
| 316 | |
djsollen@google.com | 5492424 | 2012-03-29 15:18:04 +0000 | [diff] [blame] | 317 | void SkColorFilterImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 318 | this->INHERITED::flatten(buffer); |
| 319 | |
| 320 | buffer.writeFlattenable(fColorFilter); |
| 321 | } |
| 322 | |
| 323 | SkColorFilterImageFilter::SkColorFilterImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 324 | fColorFilter = (SkColorFilter*)buffer.readFlattenable(); |
| 325 | } |
| 326 | |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 327 | /////////////////////////////////////////////////////////////////////////////// |
| 328 | |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 329 | bool SkDownSampleImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src, |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 330 | const SkMatrix& matrix, |
| 331 | SkBitmap* result, SkIPoint*) { |
| 332 | SkScalar scale = fScale; |
| 333 | if (scale > SK_Scalar1 || scale <= 0) { |
| 334 | return false; |
| 335 | } |
| 336 | |
| 337 | int dstW = SkScalarRoundToInt(src.width() * scale); |
| 338 | int dstH = SkScalarRoundToInt(src.height() * scale); |
| 339 | if (dstW < 1) { |
| 340 | dstW = 1; |
| 341 | } |
| 342 | if (dstH < 1) { |
| 343 | dstH = 1; |
| 344 | } |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 345 | |
| 346 | SkBitmap tmp; |
| 347 | |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 348 | // downsample |
| 349 | { |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 350 | SkDevice* dev = proxy->createDevice(dstW, dstH); |
| 351 | if (NULL == dev) { |
| 352 | return false; |
| 353 | } |
| 354 | OwnDeviceCanvas canvas(dev); |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 355 | SkPaint paint; |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 356 | |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 357 | paint.setFilterBitmap(true); |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 358 | canvas.scale(scale, scale); |
| 359 | canvas.drawBitmap(src, 0, 0, &paint); |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 360 | tmp = dev->accessBitmap(false); |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 361 | } |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 362 | |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 363 | // upscale |
| 364 | { |
reed@google.com | 76dd277 | 2012-01-05 21:15:07 +0000 | [diff] [blame] | 365 | SkDevice* dev = proxy->createDevice(src.width(), src.height()); |
| 366 | if (NULL == dev) { |
| 367 | return false; |
| 368 | } |
| 369 | OwnDeviceCanvas canvas(dev); |
| 370 | |
| 371 | SkRect r = SkRect::MakeWH(SkIntToScalar(src.width()), |
| 372 | SkIntToScalar(src.height())); |
| 373 | canvas.drawBitmapRect(tmp, NULL, r, NULL); |
| 374 | *result = dev->accessBitmap(false); |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 375 | } |
| 376 | return true; |
| 377 | } |
| 378 | |
djsollen@google.com | 5492424 | 2012-03-29 15:18:04 +0000 | [diff] [blame] | 379 | void SkDownSampleImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
reed@google.com | 32d25b6 | 2011-12-20 16:19:00 +0000 | [diff] [blame] | 380 | this->INHERITED::flatten(buffer); |
| 381 | |
| 382 | buffer.writeScalar(fScale); |
| 383 | } |
| 384 | |
| 385 | SkDownSampleImageFilter::SkDownSampleImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 386 | fScale = buffer.readScalar(); |
| 387 | } |
| 388 | |
djsollen@google.com | a2ca41e | 2012-03-23 19:00:34 +0000 | [diff] [blame] | 389 | SK_DEFINE_FLATTENABLE_REGISTRAR(SkOffsetImageFilter) |
| 390 | SK_DEFINE_FLATTENABLE_REGISTRAR(SkComposeImageFilter) |
| 391 | SK_DEFINE_FLATTENABLE_REGISTRAR(SkMergeImageFilter) |
| 392 | SK_DEFINE_FLATTENABLE_REGISTRAR(SkColorFilterImageFilter) |
| 393 | SK_DEFINE_FLATTENABLE_REGISTRAR(SkDownSampleImageFilter) |