The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/skia/trunk/src/lazy/SkDiscardablePixelRef.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,99 @@
     1.4 +/*
     1.5 + * Copyright 2013 Google Inc.
     1.6 + *
     1.7 + * Use of this source code is governed by a BSD-style license that can be
     1.8 + * found in the LICENSE file.
     1.9 + */
    1.10 +
    1.11 +#include "SkDiscardablePixelRef.h"
    1.12 +#include "SkDiscardableMemory.h"
    1.13 +#include "SkImageGenerator.h"
    1.14 +
    1.15 +SkDiscardablePixelRef::SkDiscardablePixelRef(const SkImageInfo& info,
    1.16 +                                             SkImageGenerator* generator,
    1.17 +                                             size_t rowBytes,
    1.18 +                                             SkDiscardableMemory::Factory* fact)
    1.19 +    : INHERITED(info)
    1.20 +    , fGenerator(generator)
    1.21 +    , fDMFactory(fact)
    1.22 +    , fRowBytes(rowBytes)
    1.23 +    , fDiscardableMemory(NULL)
    1.24 +{
    1.25 +    SkASSERT(fGenerator != NULL);
    1.26 +    SkASSERT(fRowBytes > 0);
    1.27 +    // The SkImageGenerator contract requires fGenerator to always
    1.28 +    // decode the same image on each call to getPixels().
    1.29 +    this->setImmutable();
    1.30 +    SkSafeRef(fDMFactory);
    1.31 +}
    1.32 +
    1.33 +SkDiscardablePixelRef::~SkDiscardablePixelRef() {
    1.34 +    if (this->isLocked()) {
    1.35 +        fDiscardableMemory->unlock();
    1.36 +    }
    1.37 +    SkDELETE(fDiscardableMemory);
    1.38 +    SkSafeUnref(fDMFactory);
    1.39 +    SkDELETE(fGenerator);
    1.40 +}
    1.41 +
    1.42 +bool SkDiscardablePixelRef::onNewLockPixels(LockRec* rec) {
    1.43 +    if (fDiscardableMemory != NULL) {
    1.44 +        if (fDiscardableMemory->lock()) {
    1.45 +            rec->fPixels = fDiscardableMemory->data();
    1.46 +            rec->fColorTable = NULL;
    1.47 +            rec->fRowBytes = fRowBytes;
    1.48 +            return true;
    1.49 +        }
    1.50 +        SkDELETE(fDiscardableMemory);
    1.51 +        fDiscardableMemory = NULL;
    1.52 +    }
    1.53 +
    1.54 +    const size_t size = this->info().getSafeSize(fRowBytes);
    1.55 +
    1.56 +    if (fDMFactory != NULL) {
    1.57 +        fDiscardableMemory = fDMFactory->create(size);
    1.58 +    } else {
    1.59 +        fDiscardableMemory = SkDiscardableMemory::Create(size);
    1.60 +    }
    1.61 +    if (NULL == fDiscardableMemory) {
    1.62 +        return false;  // Memory allocation failed.
    1.63 +    }
    1.64 +
    1.65 +    void* pixels = fDiscardableMemory->data();
    1.66 +    if (!fGenerator->getPixels(this->info(), pixels, fRowBytes)) {
    1.67 +        fDiscardableMemory->unlock();
    1.68 +        SkDELETE(fDiscardableMemory);
    1.69 +        fDiscardableMemory = NULL;
    1.70 +        return false;
    1.71 +    }
    1.72 +
    1.73 +    rec->fPixels = pixels;
    1.74 +    rec->fColorTable = NULL;
    1.75 +    rec->fRowBytes = fRowBytes;
    1.76 +    return true;
    1.77 +}
    1.78 +
    1.79 +void SkDiscardablePixelRef::onUnlockPixels() {
    1.80 +    fDiscardableMemory->unlock();
    1.81 +}
    1.82 +
    1.83 +bool SkInstallDiscardablePixelRef(SkImageGenerator* generator,
    1.84 +                                  SkBitmap* dst,
    1.85 +                                  SkDiscardableMemory::Factory* factory) {
    1.86 +    SkImageInfo info;
    1.87 +    SkAutoTDelete<SkImageGenerator> autoGenerator(generator);
    1.88 +    if ((NULL == autoGenerator.get())
    1.89 +        || (!autoGenerator->getInfo(&info))
    1.90 +        || (!dst->setConfig(info, 0))) {
    1.91 +        return false;
    1.92 +    }
    1.93 +    SkASSERT(dst->colorType() != kUnknown_SkColorType);
    1.94 +    if (dst->empty()) {  // Use a normal pixelref.
    1.95 +        return dst->allocPixels();
    1.96 +    }
    1.97 +    SkAutoTUnref<SkDiscardablePixelRef> ref(
    1.98 +        SkNEW_ARGS(SkDiscardablePixelRef,
    1.99 +                   (info, autoGenerator.detach(), dst->rowBytes(), factory)));
   1.100 +    dst->setPixelRef(ref);
   1.101 +    return true;
   1.102 +}