remove picture-backed surfaces

src/image/SkSurface_Picture.cpp

-/*
- * Copyright 2012 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkSurface_Base.h"
-#include "SkCanvas.h"
-#include "SkImagePriv.h"
-#include "SkPicture.h"
-
-/**
- *  What does it mean to ask for more than one canvas from a picture?
- *  How do we return an Image and then "continue" recording?
- */
-class SkSurface_Picture : public SkSurface_Base {
-public:
-    SkSurface_Picture(int width, int height);
-    virtual ~SkSurface_Picture();
-
-    virtual SkCanvas* onNewCanvas() SK_OVERRIDE;
-    virtual SkSurface* onNewSurface(const SkImageInfo&) SK_OVERRIDE;
-    virtual SkImage* onNewImageSnapshot() SK_OVERRIDE;
-    virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y,
-                        const SkPaint*) SK_OVERRIDE;
-    virtual void onCopyOnWrite(ContentChangeMode) SK_OVERRIDE;
-    virtual void onDiscard() SK_OVERRIDE;
-
-private:
-    SkPicture*  fPicture;
-
-    typedef SkSurface_Base INHERITED;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-SkSurface_Picture::SkSurface_Picture(int width, int height) : INHERITED(width, height) {
-    fPicture = NULL;
-}
-
-SkSurface_Picture::~SkSurface_Picture() {
-    SkSafeUnref(fPicture);
-}
-
-SkCanvas* SkSurface_Picture::onNewCanvas() {
-    if (!fPicture) {
-        fPicture = SkNEW(SkPicture);
-    }
-    SkCanvas* canvas = fPicture->beginRecording(this->width(), this->height());
-    canvas->ref();  // our caller will call unref()
-    return canvas;
-}
-
-SkSurface* SkSurface_Picture::onNewSurface(const SkImageInfo& info) {
-    return SkSurface::NewPicture(info.fWidth, info.fHeight);
-}
-
-SkImage* SkSurface_Picture::onNewImageSnapshot() {
-    if (fPicture) {
-        return SkNewImageFromPicture(fPicture);
-    } else {
-        SkImageInfo info;
-        info.fWidth = info.fHeight = 0;
-        info.fColorType = kPMColor_SkColorType;
-        info.fAlphaType = kOpaque_SkAlphaType;
-        return SkImage::NewRasterCopy(info, NULL, 0);
-    }
-}
-
-void SkSurface_Picture::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
-                               const SkPaint* paint) {
-    if (!fPicture) {
-        return;
-    }
-    SkImagePrivDrawPicture(canvas, fPicture, x, y, paint);
-}
-
-void SkSurface_Picture::onCopyOnWrite(ContentChangeMode mode) {
-    // We always spawn a copy of the recording picture when we
-    // are asked for a snapshot, so we never need to do anything here.
-    if (kDiscard_ContentChangeMode == mode) {
-        this->SkSurface_Picture::onDiscard();
-    }
-}
-
-void SkSurface_Picture::onDiscard() {
-    if (NULL != fPicture) {
-        fPicture->beginRecording(this->width(), this->height());
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-
-SkSurface* SkSurface::NewPicture(int width, int height) {
-    if ((width | height) < 0) {
-        return NULL;
-    }
-
-    return SkNEW_ARGS(SkSurface_Picture, (width, height));
-}