submodule/skia/src/image/SkImage.cpp

   1 /*
   2  * Copyright 2012 Google Inc.
   3  *
   4  * Use of this source code is governed by a BSD-style license that can be
   5  * found in the LICENSE file.
   6  */
   7
   8 #include "include/core/SkBitmap.h"
   9 #include "include/core/SkData.h"
  10 #include "include/core/SkImageEncoder.h"
  11 #include "include/core/SkImageFilter.h"
  12 #include "include/core/SkImageGenerator.h"
  13 #include "include/core/SkPicture.h"
  14 #include "include/core/SkSurface.h"
  15 #include "src/core/SkBitmapCache.h"
  16 #include "src/core/SkCachedData.h"
  17 #include "src/core/SkColorSpacePriv.h"
  18 #include "src/core/SkImageFilterCache.h"
  19 #include "src/core/SkImageFilter_Base.h"
  20 #include "src/core/SkImagePriv.h"
  21 #include "src/core/SkMipmap.h"
  22 #include "src/core/SkMipmapBuilder.h"
  23 #include "src/core/SkNextID.h"
  24 #include "src/core/SkSamplingPriv.h"
  25 #include "src/core/SkSpecialImage.h"
  26 #include "src/image/SkImage_Base.h"
  27 #include "src/image/SkReadPixelsRec.h"
  28 #include "src/image/SkRescaleAndReadPixels.h"
  29 #include "src/shaders/SkImageShader.h"
  30
  31 #if SK_SUPPORT_GPU
  32 #include "include/gpu/GrBackendSurface.h"
  33 #include "include/gpu/GrContextThreadSafeProxy.h"
  34 #include "include/gpu/GrDirectContext.h"
  35 #include "src/gpu/ganesh/GrDirectContextPriv.h"
  36 #include "src/gpu/ganesh/GrFragmentProcessor.h"
  37 #include "src/gpu/ganesh/GrImageContextPriv.h"
  38 #include "src/gpu/ganesh/GrProxyProvider.h"
  39 #include "src/gpu/ganesh/GrRecordingContextPriv.h"
  40 #include "src/gpu/ganesh/SkGr.h"
  41 #include "src/gpu/ganesh/effects/GrBicubicEffect.h"
  42 #include "src/gpu/ganesh/effects/GrTextureEffect.h"
  43 #include "src/image/SkImage_Gpu.h"
  44 #endif
  45
  46 SkImage::SkImage(const SkImageInfo& info, uint32_t uniqueID)
  47         : fInfo(info)
  48         , fUniqueID(kNeedNewImageUniqueID == uniqueID ? SkNextID::ImageID() : uniqueID) {
  49     SkASSERT(info.width() > 0);
  50     SkASSERT(info.height() > 0);
  51 }
  52
  53 bool SkImage::peekPixels(SkPixmap* pm) const {
  54     SkPixmap tmp;
  55     if (!pm) {
  56         pm = &tmp;
  57     }
  58     return as_IB(this)->onPeekPixels(pm);
  59 }
  60
  61 bool SkImage::readPixels(GrDirectContext* dContext, const SkImageInfo& dstInfo, void* dstPixels,
  62                          size_t dstRowBytes, int srcX, int srcY, CachingHint chint) const {
  63     return as_IB(this)->onReadPixels(dContext, dstInfo, dstPixels, dstRowBytes, srcX, srcY, chint);
  64 }
  65
  66 #ifndef SK_IMAGE_READ_PIXELS_DISABLE_LEGACY_API
  67 bool SkImage::readPixels(const SkImageInfo& dstInfo, void* dstPixels,
  68                          size_t dstRowBytes, int srcX, int srcY, CachingHint chint) const {
  69     auto dContext = as_IB(this)->directContext();
  70     return this->readPixels(dContext, dstInfo, dstPixels, dstRowBytes, srcX, srcY, chint);
  71 }
  72 #endif
  73
  74 void SkImage::asyncRescaleAndReadPixels(const SkImageInfo& info,
  75                                         const SkIRect& srcRect,
  76                                         RescaleGamma rescaleGamma,
  77                                         RescaleMode rescaleMode,
  78                                         ReadPixelsCallback callback,
  79                                         ReadPixelsContext context) const {
  80     if (!SkIRect::MakeWH(this->width(), this->height()).contains(srcRect) ||
  81         !SkImageInfoIsValid(info)) {
  82         callback(context, nullptr);
  83         return;
  84     }
  85     as_IB(this)->onAsyncRescaleAndReadPixels(
  86             info, srcRect, rescaleGamma, rescaleMode, callback, context);
  87 }
  88
  89 void SkImage::asyncRescaleAndReadPixelsYUV420(SkYUVColorSpace yuvColorSpace,
  90                                               sk_sp<SkColorSpace> dstColorSpace,
  91                                               const SkIRect& srcRect,
  92                                               const SkISize& dstSize,
  93                                               RescaleGamma rescaleGamma,
  94                                               RescaleMode rescaleMode,
  95                                               ReadPixelsCallback callback,
  96                                               ReadPixelsContext context) const {
  97     if (!SkIRect::MakeWH(this->width(), this->height()).contains(srcRect) || dstSize.isZero() ||
  98         (dstSize.width() & 0b1) || (dstSize.height() & 0b1)) {
  99         callback(context, nullptr);
 100         return;
 101     }
 102     as_IB(this)->onAsyncRescaleAndReadPixelsYUV420(yuvColorSpace,
 103                                                    std::move(dstColorSpace),
 104                                                    srcRect,
 105                                                    dstSize,
 106                                                    rescaleGamma,
 107                                                    rescaleMode,
 108                                                    callback,
 109                                                    context);
 110 }
 111
 112 bool SkImage::scalePixels(const SkPixmap& dst, const SkSamplingOptions& sampling,
 113                           CachingHint chint) const {
 114     // Context TODO: Elevate GrDirectContext requirement to public API.
 115     auto dContext = as_IB(this)->directContext();
 116     if (this->width() == dst.width() && this->height() == dst.height()) {
 117         return this->readPixels(dContext, dst, 0, 0, chint);
 118     }
 119
 120     // Idea: If/when SkImageGenerator supports a native-scaling API (where the generator itself
 121     //       can scale more efficiently) we should take advantage of it here.
 122     //
 123     SkBitmap bm;
 124     if (as_IB(this)->getROPixels(dContext, &bm, chint)) {
 125         SkPixmap pmap;
 126         // Note: By calling the pixmap scaler, we never cache the final result, so the chint
 127         //       is (currently) only being applied to the getROPixels. If we get a request to
 128         //       also attempt to cache the final (scaled) result, we would add that logic here.
 129         //
 130         return bm.peekPixels(&pmap) && pmap.scalePixels(dst, sampling);
 131     }
 132     return false;
 133 }
 134
 135 ///////////////////////////////////////////////////////////////////////////////////////////////////
 136
 137 SkColorType SkImage::colorType() const { return fInfo.colorType(); }
 138
 139 SkAlphaType SkImage::alphaType() const { return fInfo.alphaType(); }
 140
 141 SkColorSpace* SkImage::colorSpace() const { return fInfo.colorSpace(); }
 142
 143 sk_sp<SkColorSpace> SkImage::refColorSpace() const { return fInfo.refColorSpace(); }
 144
 145 sk_sp<SkShader> SkImage::makeShader(SkTileMode tmx, SkTileMode tmy,
 146                                     const SkSamplingOptions& sampling,
 147                                     const SkMatrix* localMatrix) const {
 148     return SkImageShader::Make(sk_ref_sp(const_cast<SkImage*>(this)), tmx, tmy,
 149                                sampling, localMatrix);
 150 }
 151
 152 sk_sp<SkShader> SkImage::makeRawShader(SkTileMode tmx, SkTileMode tmy,
 153                                        const SkSamplingOptions& sampling,
 154                                        const SkMatrix* localMatrix) const {
 155     return SkImageShader::MakeRaw(sk_ref_sp(const_cast<SkImage*>(this)), tmx, tmy,
 156                                   sampling, localMatrix);
 157 }
 158
 159 sk_sp<SkData> SkImage::encodeToData(SkEncodedImageFormat type, int quality) const {
 160     // Context TODO: Elevate GrDirectContext requirement to public API.
 161     auto dContext = as_IB(this)->directContext();
 162     SkBitmap bm;
 163     if (as_IB(this)->getROPixels(dContext, &bm)) {
 164         return SkEncodeBitmap(bm, type, quality);
 165     }
 166     return nullptr;
 167 }
 168
 169 sk_sp<SkData> SkImage::encodeToData() const {
 170     if (auto encoded = this->refEncodedData()) {
 171         return encoded;
 172     }
 173
 174     return this->encodeToData(SkEncodedImageFormat::kPNG, 100);
 175 }
 176
 177 sk_sp<SkData> SkImage::refEncodedData() const {
 178     return sk_sp<SkData>(as_IB(this)->onRefEncoded());
 179 }
 180
 181 sk_sp<SkImage> SkImage::MakeFromEncoded(sk_sp<SkData> encoded,
 182                                         std::optional<SkAlphaType> alphaType) {
 183     if (nullptr == encoded || 0 == encoded->size()) {
 184         return nullptr;
 185     }
 186     return SkImage::MakeFromGenerator(
 187             SkImageGenerator::MakeFromEncoded(std::move(encoded), alphaType));
 188 }
 189
 190 ///////////////////////////////////////////////////////////////////////////////////////////////////
 191
 192 sk_sp<SkImage> SkImage::makeSubset(const SkIRect& subset, GrDirectContext* direct) const {
 193     if (subset.isEmpty()) {
 194         return nullptr;
 195     }
 196
 197     const SkIRect bounds = SkIRect::MakeWH(this->width(), this->height());
 198     if (!bounds.contains(subset)) {
 199         return nullptr;
 200     }
 201
 202 #if SK_SUPPORT_GPU
 203     auto myContext = as_IB(this)->context();
 204     // This check is also performed in the subclass, but we do it here for the short-circuit below.
 205     if (myContext && !myContext->priv().matches(direct)) {
 206         return nullptr;
 207     }
 208 #endif
 209
 210     // optimization : return self if the subset == our bounds
 211     if (bounds == subset) {
 212         return sk_ref_sp(const_cast<SkImage*>(this));
 213     }
 214
 215     return as_IB(this)->onMakeSubset(subset, direct);
 216 }
 217
 218 #if SK_SUPPORT_GPU
 219
 220 bool SkImage::isTextureBacked() const {
 221     return as_IB(this)->isGaneshBacked() || as_IB(this)->isGraphiteBacked();
 222 }
 223
 224 size_t SkImage::textureSize() const { return as_IB(this)->onTextureSize(); }
 225
 226 GrBackendTexture SkImage::getBackendTexture(bool flushPendingGrContextIO,
 227                                             GrSurfaceOrigin* origin) const {
 228     return as_IB(this)->onGetBackendTexture(flushPendingGrContextIO, origin);
 229 }
 230
 231 bool SkImage::isValid(GrRecordingContext* rContext) const {
 232     if (rContext && rContext->abandoned()) {
 233         return false;
 234     }
 235     return as_IB(this)->onIsValid(rContext);
 236 }
 237
 238 GrSemaphoresSubmitted SkImage::flush(GrDirectContext* dContext,
 239                                      const GrFlushInfo& flushInfo) const {
 240     return as_IB(this)->onFlush(dContext, flushInfo);
 241 }
 242
 243 void SkImage::flushAndSubmit(GrDirectContext* dContext) const {
 244     this->flush(dContext, {});
 245     dContext->submit();
 246 }
 247
 248 #else
 249
 250 bool SkImage::isTextureBacked() const { return false; }
 251
 252 bool SkImage::isValid(GrRecordingContext* rContext) const {
 253     if (rContext) {
 254         return false;
 255     }
 256     return as_IB(this)->onIsValid(nullptr);
 257 }
 258
 259 #endif
 260
 261 ///////////////////////////////////////////////////////////////////////////////
 262
 263 SkImage_Base::SkImage_Base(const SkImageInfo& info, uint32_t uniqueID)
 264         : INHERITED(info, uniqueID), fAddedToRasterCache(false) {}
 265
 266 SkImage_Base::~SkImage_Base() {
 267     if (fAddedToRasterCache.load()) {
 268         SkNotifyBitmapGenIDIsStale(this->uniqueID());
 269     }
 270 }
 271
 272 void SkImage_Base::onAsyncRescaleAndReadPixels(const SkImageInfo& info,
 273                                                const SkIRect& origSrcRect,
 274                                                RescaleGamma rescaleGamma,
 275                                                RescaleMode rescaleMode,
 276                                                ReadPixelsCallback callback,
 277                                                ReadPixelsContext context) const {
 278     SkBitmap src;
 279     SkPixmap peek;
 280     SkIRect srcRect;
 281     if (this->peekPixels(&peek)) {
 282         src.installPixels(peek);
 283         srcRect = origSrcRect;
 284     } else {
 285         // Context TODO: Elevate GrDirectContext requirement to public API.
 286         auto dContext = as_IB(this)->directContext();
 287         src.setInfo(this->imageInfo().makeDimensions(origSrcRect.size()));
 288         src.allocPixels();
 289         if (!this->readPixels(dContext, src.pixmap(), origSrcRect.x(), origSrcRect.y())) {
 290             callback(context, nullptr);
 291             return;
 292         }
 293         srcRect = SkIRect::MakeSize(src.dimensions());
 294     }
 295     return SkRescaleAndReadPixels(src, info, srcRect, rescaleGamma, rescaleMode, callback, context);
 296 }
 297
 298 void SkImage_Base::onAsyncRescaleAndReadPixelsYUV420(SkYUVColorSpace,
 299                                                      sk_sp<SkColorSpace> dstColorSpace,
 300                                                      const SkIRect& srcRect,
 301                                                      const SkISize& dstSize,
 302                                                      RescaleGamma,
 303                                                      RescaleMode,
 304                                                      ReadPixelsCallback callback,
 305                                                      ReadPixelsContext context) const {
 306     // TODO: Call non-YUV asyncRescaleAndReadPixels and then make our callback convert to YUV and
 307     // call client's callback.
 308     callback(context, nullptr);
 309 }
 310
 311 #if SK_SUPPORT_GPU
 312 std::tuple<GrSurfaceProxyView, GrColorType> SkImage_Base::asView(GrRecordingContext* context,
 313                                                                  GrMipmapped mipmapped,
 314                                                                  GrImageTexGenPolicy policy) const {
 315     if (!context) {
 316         return {};
 317     }
 318     if (!context->priv().caps()->mipmapSupport() || this->dimensions().area() <= 1) {
 319         mipmapped = GrMipmapped::kNo;
 320     }
 321     return this->onAsView(context, mipmapped, policy);
 322 }
 323
 324 std::unique_ptr<GrFragmentProcessor> SkImage_Base::asFragmentProcessor(
 325         GrRecordingContext* rContext,
 326         SkSamplingOptions sampling,
 327         const SkTileMode tileModes[2],
 328         const SkMatrix& m,
 329         const SkRect* subset,
 330         const SkRect* domain) const {
 331     if (!rContext) {
 332         return {};
 333     }
 334     if (sampling.useCubic && !GrValidCubicResampler(sampling.cubic)) {
 335         return {};
 336     }
 337     if (sampling.mipmap != SkMipmapMode::kNone &&
 338         (!rContext->priv().caps()->mipmapSupport() || this->dimensions().area() <= 1)) {
 339         sampling = SkSamplingOptions(sampling.filter);
 340     }
 341     return this->onAsFragmentProcessor(rContext, sampling, tileModes, m, subset, domain);
 342 }
 343
 344 std::unique_ptr<GrFragmentProcessor> SkImage_Base::MakeFragmentProcessorFromView(
 345         GrRecordingContext* rContext,
 346         GrSurfaceProxyView view,
 347         SkAlphaType at,
 348         SkSamplingOptions sampling,
 349         const SkTileMode tileModes[2],
 350         const SkMatrix& m,
 351         const SkRect* subset,
 352         const SkRect* domain) {
 353     if (!view) {
 354         return nullptr;
 355     }
 356     const GrCaps& caps = *rContext->priv().caps();
 357     auto wmx = SkTileModeToWrapMode(tileModes[0]);
 358     auto wmy = SkTileModeToWrapMode(tileModes[1]);
 359     if (sampling.useCubic) {
 360         if (subset) {
 361             if (domain) {
 362                 return GrBicubicEffect::MakeSubset(std::move(view),
 363                                                    at,
 364                                                    m,
 365                                                    wmx,
 366                                                    wmy,
 367                                                    *subset,
 368                                                    *domain,
 369                                                    sampling.cubic,
 370                                                    GrBicubicEffect::Direction::kXY,
 371                                                    *rContext->priv().caps());
 372             }
 373             return GrBicubicEffect::MakeSubset(std::move(view),
 374                                                at,
 375                                                m,
 376                                                wmx,
 377                                                wmy,
 378                                                *subset,
 379                                                sampling.cubic,
 380                                                GrBicubicEffect::Direction::kXY,
 381                                                *rContext->priv().caps());
 382         }
 383         return GrBicubicEffect::Make(std::move(view),
 384                                      at,
 385                                      m,
 386                                      wmx,
 387                                      wmy,
 388                                      sampling.cubic,
 389                                      GrBicubicEffect::Direction::kXY,
 390                                      *rContext->priv().caps());
 391     }
 392     if (sampling.isAniso()) {
 393         if (!rContext->priv().caps()->anisoSupport()) {
 394             // Fallback to linear
 395             sampling = SkSamplingPriv::AnisoFallback(view.mipmapped() == GrMipmapped::kYes);
 396         }
 397     } else if (view.mipmapped() == GrMipmapped::kNo) {
 398         sampling = SkSamplingOptions(sampling.filter);
 399     }
 400     GrSamplerState sampler;
 401     if (sampling.isAniso()) {
 402         sampler = GrSamplerState::Aniso(wmx, wmy, sampling.maxAniso, view.mipmapped());
 403     } else {
 404         sampler = GrSamplerState(wmx, wmy, sampling.filter, sampling.mipmap);
 405     }
 406     if (subset) {
 407         if (domain) {
 408             return GrTextureEffect::MakeSubset(std::move(view),
 409                                                at,
 410                                                m,
 411                                                sampler,
 412                                                *subset,
 413                                                *domain,
 414                                                caps);
 415         }
 416         return GrTextureEffect::MakeSubset(std::move(view),
 417                                            at,
 418                                            m,
 419                                            sampler,
 420                                            *subset,
 421                                            caps);
 422     } else {
 423         return GrTextureEffect::Make(std::move(view), at, m, sampler, caps);
 424     }
 425 }
 426
 427 GrSurfaceProxyView SkImage_Base::FindOrMakeCachedMipmappedView(GrRecordingContext* rContext,
 428                                                                GrSurfaceProxyView view,
 429                                                                uint32_t imageUniqueID) {
 430     SkASSERT(rContext);
 431     SkASSERT(imageUniqueID != SK_InvalidUniqueID);
 432
 433     if (!view || view.proxy()->asTextureProxy()->mipmapped() == GrMipmapped::kYes) {
 434         return view;
 435     }
 436     GrProxyProvider* proxyProvider = rContext->priv().proxyProvider();
 437
 438     skgpu::UniqueKey baseKey;
 439     GrMakeKeyFromImageID(&baseKey, imageUniqueID, SkIRect::MakeSize(view.dimensions()));
 440     SkASSERT(baseKey.isValid());
 441     skgpu::UniqueKey mipmappedKey;
 442     static const skgpu::UniqueKey::Domain kMipmappedDomain = skgpu::UniqueKey::GenerateDomain();
 443     {  // No extra values beyond the domain are required. Must name the var to please
 444        // clang-tidy.
 445         skgpu::UniqueKey::Builder b(&mipmappedKey, baseKey, kMipmappedDomain, 0);
 446     }
 447     SkASSERT(mipmappedKey.isValid());
 448     if (sk_sp<GrTextureProxy> cachedMippedView =
 449                 proxyProvider->findOrCreateProxyByUniqueKey(mipmappedKey)) {
 450         return {std::move(cachedMippedView), view.origin(), view.swizzle()};
 451     }
 452
 453     auto copy = GrCopyBaseMipMapToView(rContext, view);
 454     if (!copy) {
 455         return view;
 456     }
 457     // TODO: If we move listeners up from SkImage_Lazy to SkImage_Base then add one here.
 458     proxyProvider->assignUniqueKeyToProxy(mipmappedKey, copy.asTextureProxy());
 459     return copy;
 460 }
 461
 462 GrBackendTexture SkImage_Base::onGetBackendTexture(bool flushPendingGrContextIO,
 463                                                    GrSurfaceOrigin* origin) const {
 464     return GrBackendTexture(); // invalid
 465 }
 466
 467 #endif // SK_SUPPORT_GPU
 468
 469 #ifdef SK_GRAPHITE_ENABLED
 470 std::tuple<skgpu::graphite::TextureProxyView, SkColorType> SkImage_Base::asView(
 471         skgpu::graphite::Recorder* recorder, skgpu::graphite::Mipmapped mipmapped) const {
 472     if (!recorder) {
 473         return {};
 474     }
 475     if (this->dimensions().area() <= 1) {
 476         mipmapped = skgpu::graphite::Mipmapped::kNo;
 477     }
 478     return this->onAsView(recorder, mipmapped);
 479 }
 480 #endif // SK_GRAPHITE_ENABLED
 481
 482 GrDirectContext* SkImage_Base::directContext() const {
 483 #if SK_SUPPORT_GPU
 484     return GrAsDirectContext(this->context());
 485 #else
 486     return nullptr;
 487 #endif
 488 }
 489
 490 bool SkImage::readPixels(GrDirectContext* dContext, const SkPixmap& pmap, int srcX, int srcY,
 491                          CachingHint chint) const {
 492     return this->readPixels(dContext, pmap.info(), pmap.writable_addr(), pmap.rowBytes(), srcX,
 493                             srcY, chint);
 494 }
 495
 496 #ifndef SK_IMAGE_READ_PIXELS_DISABLE_LEGACY_API
 497 bool SkImage::readPixels(const SkPixmap& pmap, int srcX, int srcY, CachingHint chint) const {
 498     auto dContext = as_IB(this)->directContext();
 499     return this->readPixels(dContext, pmap, srcX, srcY, chint);
 500 }
 501 #endif
 502
 503 ///////////////////////////////////////////////////////////////////////////////////////////////////
 504
 505 sk_sp<SkImage> SkImage::MakeFromBitmap(const SkBitmap& bm) {
 506     if (!bm.pixelRef()) {
 507         return nullptr;
 508     }
 509
 510     return SkMakeImageFromRasterBitmap(bm, kIfMutable_SkCopyPixelsMode);
 511 }
 512
 513 bool SkImage::asLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode ) const {
 514     // Context TODO: Elevate GrDirectContext requirement to public API.
 515     auto dContext = as_IB(this)->directContext();
 516     return as_IB(this)->onAsLegacyBitmap(dContext, bitmap);
 517 }
 518
 519 bool SkImage_Base::onAsLegacyBitmap(GrDirectContext* dContext, SkBitmap* bitmap) const {
 520     // As the base-class, all we can do is make a copy (regardless of mode).
 521     // Subclasses that want to be more optimal should override.
 522     SkImageInfo info = fInfo.makeColorType(kN32_SkColorType).makeColorSpace(nullptr);
 523     if (!bitmap->tryAllocPixels(info)) {
 524         return false;
 525     }
 526
 527     if (!this->readPixels(dContext, bitmap->info(), bitmap->getPixels(), bitmap->rowBytes(),
 528                           0, 0)) {
 529         bitmap->reset();
 530         return false;
 531     }
 532
 533     bitmap->setImmutable();
 534     return true;
 535 }
 536
 537 sk_sp<SkImage> SkImage::MakeFromPicture(sk_sp<SkPicture> picture, const SkISize& dimensions,
 538                                         const SkMatrix* matrix, const SkPaint* paint,
 539                                         BitDepth bitDepth, sk_sp<SkColorSpace> colorSpace) {
 540     return MakeFromGenerator(SkImageGenerator::MakeFromPicture(dimensions, std::move(picture),
 541                                                                matrix, paint, bitDepth,
 542                                                                std::move(colorSpace)));
 543 }
 544
 545 sk_sp<SkImage> SkImage::makeWithFilter(GrRecordingContext* rContext, const SkImageFilter* filter,
 546                                        const SkIRect& subset, const SkIRect& clipBounds,
 547                                        SkIRect* outSubset, SkIPoint* offset) const {
 548
 549     if (!filter || !outSubset || !offset || !this->bounds().contains(subset)) {
 550         return nullptr;
 551     }
 552     sk_sp<SkSpecialImage> srcSpecialImage;
 553 #if SK_SUPPORT_GPU
 554     auto myContext = as_IB(this)->context();
 555     if (myContext && !myContext->priv().matches(rContext)) {
 556         return nullptr;
 557     }
 558     srcSpecialImage = SkSpecialImage::MakeFromImage(rContext, subset,
 559                                                     sk_ref_sp(const_cast<SkImage*>(this)),
 560                                                     SkSurfaceProps());
 561 #else
 562     srcSpecialImage = SkSpecialImage::MakeFromImage(nullptr, subset,
 563                                                     sk_ref_sp(const_cast<SkImage*>(this)),
 564                                                     SkSurfaceProps());
 565 #endif
 566     if (!srcSpecialImage) {
 567         return nullptr;
 568     }
 569
 570     sk_sp<SkImageFilterCache> cache(
 571         SkImageFilterCache::Create(SkImageFilterCache::kDefaultTransientSize));
 572
 573     // The filters operate in the local space of the src image, where (0,0) corresponds to the
 574     // subset's top left corner. But the clip bounds and any crop rects on the filters are in the
 575     // original coordinate system, so configure the CTM to correct crop rects and explicitly adjust
 576     // the clip bounds (since it is assumed to already be in image space).
 577     SkImageFilter_Base::Context context(SkMatrix::Translate(-subset.x(), -subset.y()),
 578                                         clipBounds.makeOffset(-subset.topLeft()),
 579                                         cache.get(), fInfo.colorType(), fInfo.colorSpace(),
 580                                         srcSpecialImage.get());
 581
 582     sk_sp<SkSpecialImage> result = as_IFB(filter)->filterImage(context).imageAndOffset(offset);
 583     if (!result) {
 584         return nullptr;
 585     }
 586
 587     // The output image and offset are relative to the subset rectangle, so the offset needs to
 588     // be shifted to put it in the correct spot with respect to the original coordinate system
 589     offset->fX += subset.x();
 590     offset->fY += subset.y();
 591
 592     // Final clip against the exact clipBounds (the clip provided in the context gets adjusted
 593     // to account for pixel-moving filters so doesn't always exactly match when finished). The
 594     // clipBounds are translated into the clippedDstRect coordinate space, including the
 595     // result->subset() ensures that the result's image pixel origin does not affect results.
 596     SkIRect dstRect = result->subset();
 597     SkIRect clippedDstRect = dstRect;
 598     if (!clippedDstRect.intersect(clipBounds.makeOffset(result->subset().topLeft() - *offset))) {
 599         return nullptr;
 600     }
 601
 602     // Adjust the geometric offset if the top-left corner moved as well
 603     offset->fX += (clippedDstRect.x() - dstRect.x());
 604     offset->fY += (clippedDstRect.y() - dstRect.y());
 605     *outSubset = clippedDstRect;
 606     return result->asImage();
 607 }
 608
 609 bool SkImage::isLazyGenerated() const {
 610     return as_IB(this)->onIsLazyGenerated();
 611 }
 612
 613 bool SkImage::isAlphaOnly() const { return SkColorTypeIsAlphaOnly(fInfo.colorType()); }
 614
 615 sk_sp<SkImage> SkImage::makeColorSpace(sk_sp<SkColorSpace> target, GrDirectContext* direct) const {
 616     return this->makeColorTypeAndColorSpace(this->colorType(), std::move(target), direct);
 617 }
 618
 619 sk_sp<SkImage> SkImage::makeColorTypeAndColorSpace(SkColorType targetColorType,
 620                                                    sk_sp<SkColorSpace> targetColorSpace,
 621                                                    GrDirectContext* dContext) const {
 622     if (kUnknown_SkColorType == targetColorType || !targetColorSpace) {
 623         return nullptr;
 624     }
 625
 626 #if SK_SUPPORT_GPU
 627     auto myContext = as_IB(this)->context();
 628     // This check is also performed in the subclass, but we do it here for the short-circuit below.
 629     if (myContext && !myContext->priv().matches(dContext)) {
 630         return nullptr;
 631     }
 632 #endif
 633
 634     SkColorType colorType = this->colorType();
 635     SkColorSpace* colorSpace = this->colorSpace();
 636     if (!colorSpace) {
 637         colorSpace = sk_srgb_singleton();
 638     }
 639     if (colorType == targetColorType &&
 640         (SkColorSpace::Equals(colorSpace, targetColorSpace.get()) || this->isAlphaOnly())) {
 641         return sk_ref_sp(const_cast<SkImage*>(this));
 642     }
 643
 644     return as_IB(this)->onMakeColorTypeAndColorSpace(targetColorType,
 645                                                      std::move(targetColorSpace), dContext);
 646 }
 647
 648 sk_sp<SkImage> SkImage::reinterpretColorSpace(sk_sp<SkColorSpace> target) const {
 649     if (!target) {
 650         return nullptr;
 651     }
 652
 653     // No need to create a new image if:
 654     // (1) The color spaces are equal.
 655     // (2) The color type is kAlpha8.
 656     SkColorSpace* colorSpace = this->colorSpace();
 657     if (!colorSpace) {
 658         colorSpace = sk_srgb_singleton();
 659     }
 660     if (SkColorSpace::Equals(colorSpace, target.get()) || this->isAlphaOnly()) {
 661         return sk_ref_sp(const_cast<SkImage*>(this));
 662     }
 663
 664     return as_IB(this)->onReinterpretColorSpace(std::move(target));
 665 }
 666
 667 sk_sp<SkImage> SkImage::makeNonTextureImage() const {
 668     if (!this->isTextureBacked()) {
 669         return sk_ref_sp(const_cast<SkImage*>(this));
 670     }
 671     return this->makeRasterImage();
 672 }
 673
 674 sk_sp<SkImage> SkImage::makeRasterImage(CachingHint chint) const {
 675     SkPixmap pm;
 676     if (this->peekPixels(&pm)) {
 677         return sk_ref_sp(const_cast<SkImage*>(this));
 678     }
 679
 680     const size_t rowBytes = fInfo.minRowBytes();
 681     size_t size = fInfo.computeByteSize(rowBytes);
 682     if (SkImageInfo::ByteSizeOverflowed(size)) {
 683         return nullptr;
 684     }
 685
 686     // Context TODO: Elevate GrDirectContext requirement to public API.
 687     auto dContext = as_IB(this)->directContext();
 688     sk_sp<SkData> data = SkData::MakeUninitialized(size);
 689     pm = {fInfo.makeColorSpace(nullptr), data->writable_data(), fInfo.minRowBytes()};
 690     if (!this->readPixels(dContext, pm, 0, 0, chint)) {
 691         return nullptr;
 692     }
 693
 694     return SkImage::MakeRasterData(fInfo, std::move(data), rowBytes);
 695 }
 696
 697 bool SkImage_pinAsTexture(const SkImage* image, GrRecordingContext* rContext) {
 698     SkASSERT(image);
 699     SkASSERT(rContext);
 700     return as_IB(image)->onPinAsTexture(rContext);
 701 }
 702
 703 void SkImage_unpinAsTexture(const SkImage* image, GrRecordingContext* rContext) {
 704     SkASSERT(image);
 705     SkASSERT(rContext);
 706     as_IB(image)->onUnpinAsTexture(rContext);
 707 }
 708
 709 ///////////////////////////////////////////////////////////////////////////////////////////////////
 710
 711 SkMipmapBuilder::SkMipmapBuilder(const SkImageInfo& info) {
 712     fMM = sk_sp<SkMipmap>(SkMipmap::Build({info, nullptr, 0}, nullptr, false));
 713 }
 714
 715 SkMipmapBuilder::~SkMipmapBuilder() {}
 716
 717 int SkMipmapBuilder::countLevels() const {
 718     return fMM ? fMM->countLevels() : 0;
 719 }
 720
 721 SkPixmap SkMipmapBuilder::level(int index) const {
 722     SkPixmap pm;
 723
 724     SkMipmap::Level level;
 725     if (fMM && fMM->getLevel(index, &level)) {
 726         pm = level.fPixmap;
 727     }
 728     return pm;
 729 }
 730
 731 bool SkImage::hasMipmaps() const { return as_IB(this)->onHasMipmaps(); }
 732
 733 sk_sp<SkImage> SkImage::withMipmaps(sk_sp<SkMipmap> mips) const {
 734     if (mips == nullptr || mips->validForRootLevel(this->imageInfo())) {
 735         if (auto result = as_IB(this)->onMakeWithMipmaps(std::move(mips))) {
 736             return result;
 737         }
 738     }
 739     return sk_ref_sp((const_cast<SkImage*>(this)));
 740 }
 741
 742 sk_sp<SkImage> SkImage::withDefaultMipmaps() const {
 743     return this->withMipmaps(nullptr);
 744 }
 745
 746 sk_sp<SkImage> SkMipmapBuilder::attachTo(const SkImage* src) {
 747     return src->withMipmaps(fMM);
 748 }
 749
 750 //////////////////////////////////////////////////////////////////////////////////////////////////
 751
 752 SkSamplingOptions SkSamplingPriv::FromFQ(SkLegacyFQ fq, SkMediumAs behavior) {
 753     switch (fq) {
 754         case kHigh_SkLegacyFQ:
 755             return SkSamplingOptions(SkCubicResampler{1/3.0f, 1/3.0f});
 756         case kMedium_SkLegacyFQ:
 757             return SkSamplingOptions(SkFilterMode::kLinear,
 758                                       behavior == kNearest_SkMediumAs ? SkMipmapMode::kNearest
 759                                                                       : SkMipmapMode::kLinear);
 760         case kLow_SkLegacyFQ:
 761             return SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kNone);
 762         case kNone_SkLegacyFQ:
 763             break;
 764     }
 765     return SkSamplingOptions(SkFilterMode::kNearest, SkMipmapMode::kNone);
 766 }