00f8d6c75d
Fix is to add colortable param to installPixels()
This reverts commit 924205aaf2.
BUG=skia:
R=scroggo@google.com, reed@chromium.org
Author: reed@google.com
Review URL: https://codereview.chromium.org/300263005
git-svn-id: http://skia.googlecode.com/svn/trunk@14958 2bbb7eff-a529-9590-31e7-b0007b416f81
128 lines
4.3 KiB
C++
128 lines
4.3 KiB
C++
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkImageGenerator_DEFINED
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#define SkImageGenerator_DEFINED
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#include "SkImageInfo.h"
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#include "SkColor.h"
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class SkBitmap;
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class SkData;
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class SkImageGenerator;
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/**
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* Takes ownership of SkImageGenerator. If this method fails for
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* whatever reason, it will return false and immediatetely delete
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* the generator. If it succeeds, it will modify destination
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* bitmap.
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*
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* If generator is NULL, will safely return false.
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*
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* If this fails or when the SkDiscardablePixelRef that is
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* installed into destination is destroyed, it will call
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* SkDELETE() on the generator. Therefore, generator should be
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* allocated with SkNEW() or SkNEW_ARGS().
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*
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* @param destination Upon success, this bitmap will be
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* configured and have a pixelref installed.
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*
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* @return true iff successful.
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*/
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SK_API bool SkInstallDiscardablePixelRef(SkImageGenerator*, SkBitmap* destination);
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/**
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* Purges all unlocked discardable memory in Skia's global
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* discardable memory pool.
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*/
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SK_API void SkPurgeGlobalDiscardableMemoryPool();
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/**
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* An interface that allows a purgeable PixelRef (such as a
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* SkDiscardablePixelRef) to decode and re-decode an image as needed.
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*/
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class SK_API SkImageGenerator {
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public:
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/**
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* The PixelRef which takes ownership of this SkImageGenerator
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* will call the image generator's destructor.
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*/
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virtual ~SkImageGenerator() { }
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#ifdef SK_SUPPORT_LEGACY_IMAGEGENERATORAPI
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virtual bool refEncodedData() { return this->onRefEncodedData(); }
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virtual bool getInfo(SkImageInfo* info) { return this->onGetInfo(info); }
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virtual bool getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes) {
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return this->onGetPixels(info, pixels, rowBytes, NULL, NULL);
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}
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#else
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/**
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* Return a ref to the encoded (i.e. compressed) representation,
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* of this data.
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*
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* If non-NULL is returned, the caller is responsible for calling
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* unref() on the data when it is finished.
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*/
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SkData* refEncodedData() { return this->onRefEncodedData(); }
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/**
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* Return some information about the image, allowing the owner of
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* this object to allocate pixels.
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*
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* Repeated calls to this function should give the same results,
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* allowing the PixelRef to be immutable.
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*
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* @return false if anything goes wrong.
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*/
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bool getInfo(SkImageInfo* info);
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/**
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* Decode into the given pixels, a block of memory of size at
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* least (info.fHeight - 1) * rowBytes + (info.fWidth *
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* bytesPerPixel)
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*
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* Repeated calls to this function should give the same results,
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* allowing the PixelRef to be immutable.
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*
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* @param info A description of the format (config, size)
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* expected by the caller. This can simply be identical
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* to the info returned by getInfo().
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*
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* This contract also allows the caller to specify
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* different output-configs, which the implementation can
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* decide to support or not.
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*
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* If info is kIndex8_SkColorType, then the caller must provide storage for up to 256
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* SkPMColor values in ctable. On success the generator must copy N colors into that storage,
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* (where N is the logical number of table entries) and set ctableCount to N.
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*
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* If info is not kIndex8_SkColorType, then the last two parameters may be NULL. If ctableCount
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* is not null, it will be set to 0.
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*
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* @return false if anything goes wrong or if the image info is
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* unsupported.
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*/
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bool getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
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SkPMColor ctable[], int* ctableCount);
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/**
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* Simplified version of getPixels() that asserts that info is NOT kIndex8_SkColorType.
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*/
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bool getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes);
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#endif
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protected:
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virtual SkData* onRefEncodedData();
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virtual bool onGetInfo(SkImageInfo* info);
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virtual bool onGetPixels(const SkImageInfo& info,
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void* pixels, size_t rowBytes,
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SkPMColor ctable[], int* ctableCount);
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};
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#endif // SkImageGenerator_DEFINED
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