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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SkPDFImage_DEFINED
#define SkPDFImage_DEFINED
#include "SkPDFStream.h"
#include "SkPDFTypes.h"
#include "SkRefCnt.h"
class SkBitmap;
class SkPaint;
class SkPDFCatalog;
struct SkIRect;
/** \class SkPDFImage
An image XObject.
*/
// We could play the same trick here as is done in SkPDFGraphicState, storing
// a copy of the Bitmap object (not the pixels), the pixel generation number,
// and settings used from the paint to canonicalize image objects.
class SkPDFImage : public SkPDFObject {
public:
/** Create a new Image XObject to represent the passed bitmap.
* @param bitmap The image to encode.
* @param srcRect The rectangle to cut out of bitmap.
* @param paint Used to calculate alpha, masks, etc.
* @return The image XObject or NUll if there is nothing to draw for
* the given parameters.
*/
static SkPDFImage* CreateImage(const SkBitmap& bitmap,
const SkIRect& srcRect,
const SkPaint& paint);
virtual ~SkPDFImage();
/** Add a Soft Mask (alpha or shape channel) to the image. Refs mask.
* @param mask A gray scale image representing the mask.
* @return The mask argument is returned.
*/
SkPDFImage* addSMask(SkPDFImage* mask);
// The SkPDFObject interface.
virtual void emitObject(SkWStream* stream, SkPDFCatalog* catalog,
bool indirect);
virtual size_t getOutputSize(SkPDFCatalog* catalog, bool indirect);
virtual void getResources(SkTDArray<SkPDFObject*>* resourceList);
private:
SkRefPtr<SkPDFStream> fStream;
SkTDArray<SkPDFObject*> fResources;
/** Create a PDF image XObject. Entries for the image properties are
* automatically added to the stream dictionary.
* @param imageData The final raw bits representing the image.
* @param bitmap The image parameters to use (Config, etc).
* @param srcRect The clipping applied to bitmap before generating
* imageData.
* @param alpha Is this the alpha channel of the bitmap.
* @param paint Used to calculate alpha, masks, etc.
*/
SkPDFImage(SkStream* imageData, const SkBitmap& bitmap,
const SkIRect& srcRect, bool alpha, const SkPaint& paint);
/** Add the value to the stream dictionary with the given key. Refs value.
* @param key The key for this dictionary entry.
* @param value The value for this dictionary entry.
* @return The value argument is returned.
*/
SkPDFObject* insert(SkPDFName* key, SkPDFObject* value);
/** Add the value to the stream dictionary with the given key. Refs value.
* @param key The text of the key for this dictionary entry.
* @param value The value for this dictionary entry.
* @return The value argument is returned.
*/
SkPDFObject* insert(const char key[], SkPDFObject* value);
};
#endif
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