The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/skia/trunk/src/image/SkSurface.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,127 @@
     1.4 +/*
     1.5 + * Copyright 2012 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 "SkSurface_Base.h"
    1.12 +#include "SkImagePriv.h"
    1.13 +#include "SkCanvas.h"
    1.14 +
    1.15 +///////////////////////////////////////////////////////////////////////////////
    1.16 +
    1.17 +SkSurface_Base::SkSurface_Base(int width, int height) : INHERITED(width, height) {
    1.18 +    fCachedCanvas = NULL;
    1.19 +    fCachedImage = NULL;
    1.20 +}
    1.21 +
    1.22 +SkSurface_Base::SkSurface_Base(const SkImageInfo& info) : INHERITED(info) {
    1.23 +    fCachedCanvas = NULL;
    1.24 +    fCachedImage = NULL;
    1.25 +}
    1.26 +
    1.27 +SkSurface_Base::~SkSurface_Base() {
    1.28 +    // in case the canvas outsurvives us, we null the callback
    1.29 +    if (fCachedCanvas) {
    1.30 +        fCachedCanvas->setSurfaceBase(NULL);
    1.31 +    }
    1.32 +
    1.33 +    SkSafeUnref(fCachedImage);
    1.34 +    SkSafeUnref(fCachedCanvas);
    1.35 +}
    1.36 +
    1.37 +void SkSurface_Base::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
    1.38 +                            const SkPaint* paint) {
    1.39 +    SkImage* image = this->newImageSnapshot();
    1.40 +    if (image) {
    1.41 +        image->draw(canvas, x, y, paint);
    1.42 +        image->unref();
    1.43 +    }
    1.44 +}
    1.45 +
    1.46 +void SkSurface_Base::aboutToDraw(ContentChangeMode mode) {
    1.47 +    this->dirtyGenerationID();
    1.48 +
    1.49 +    if (NULL != fCachedCanvas) {
    1.50 +        SkASSERT(fCachedCanvas->getSurfaceBase() == this || \
    1.51 +                 NULL == fCachedCanvas->getSurfaceBase());
    1.52 +        fCachedCanvas->setSurfaceBase(NULL);
    1.53 +    }
    1.54 +
    1.55 +    if (NULL != fCachedImage) {
    1.56 +        // the surface may need to fork its backend, if its sharing it with
    1.57 +        // the cached image. Note: we only call if there is an outstanding owner
    1.58 +        // on the image (besides us).
    1.59 +        if (!fCachedImage->unique()) {
    1.60 +            this->onCopyOnWrite(mode);
    1.61 +        }
    1.62 +
    1.63 +        // regardless of copy-on-write, we must drop our cached image now, so
    1.64 +        // that the next request will get our new contents.
    1.65 +        fCachedImage->unref();
    1.66 +        fCachedImage = NULL;
    1.67 +    }
    1.68 +}
    1.69 +
    1.70 +uint32_t SkSurface_Base::newGenerationID() {
    1.71 +    this->installIntoCanvasForDirtyNotification();
    1.72 +
    1.73 +    static int32_t gID;
    1.74 +    return sk_atomic_inc(&gID) + 1;
    1.75 +}
    1.76 +
    1.77 +static SkSurface_Base* asSB(SkSurface* surface) {
    1.78 +    return static_cast<SkSurface_Base*>(surface);
    1.79 +}
    1.80 +
    1.81 +///////////////////////////////////////////////////////////////////////////////
    1.82 +
    1.83 +SkSurface::SkSurface(int width, int height) : fWidth(width), fHeight(height) {
    1.84 +    SkASSERT(fWidth >= 0);
    1.85 +    SkASSERT(fHeight >= 0);
    1.86 +    fGenerationID = 0;
    1.87 +}
    1.88 +
    1.89 +SkSurface::SkSurface(const SkImageInfo& info)
    1.90 +    : fWidth(info.fWidth)
    1.91 +    , fHeight(info.fHeight)
    1.92 +{
    1.93 +    SkASSERT(fWidth >= 0);
    1.94 +    SkASSERT(fHeight >= 0);
    1.95 +    fGenerationID = 0;
    1.96 +}
    1.97 +
    1.98 +uint32_t SkSurface::generationID() {
    1.99 +    if (0 == fGenerationID) {
   1.100 +        fGenerationID = asSB(this)->newGenerationID();
   1.101 +    }
   1.102 +    return fGenerationID;
   1.103 +}
   1.104 +
   1.105 +void SkSurface::notifyContentWillChange(ContentChangeMode mode) {
   1.106 +    asSB(this)->aboutToDraw(mode);
   1.107 +}
   1.108 +
   1.109 +SkCanvas* SkSurface::getCanvas() {
   1.110 +    return asSB(this)->getCachedCanvas();
   1.111 +}
   1.112 +
   1.113 +SkImage* SkSurface::newImageSnapshot() {
   1.114 +    SkImage* image = asSB(this)->getCachedImage();
   1.115 +    SkSafeRef(image);   // the caller will call unref() to balance this
   1.116 +    return image;
   1.117 +}
   1.118 +
   1.119 +SkSurface* SkSurface::newSurface(const SkImageInfo& info) {
   1.120 +    return asSB(this)->onNewSurface(info);
   1.121 +}
   1.122 +
   1.123 +void SkSurface::draw(SkCanvas* canvas, SkScalar x, SkScalar y,
   1.124 +                     const SkPaint* paint) {
   1.125 +    return asSB(this)->onDraw(canvas, x, y, paint);
   1.126 +}
   1.127 +
   1.128 +const void* SkSurface::peekPixels(SkImageInfo* info, size_t* rowBytes) {
   1.129 +    return this->getCanvas()->peekPixels(info, rowBytes);
   1.130 +}