mirror of https://github.com/axmolengine/axmol.git
234 lines
7.9 KiB
C++
234 lines
7.9 KiB
C++
/****************************************************************************
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Copyright (c) 2010-2012 cocos2d-x.org
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Copyright (c) 2013-2016 Chukong Technologies Inc.
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Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#ifndef __CC_IMAGE_H__
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#define __CC_IMAGE_H__
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/// @cond DO_NOT_SHOW
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#include "base/CCRef.h"
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#include "renderer/CCTexture2D.h"
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// premultiply alpha, or the effect will be wrong when using other pixel formats in Texture2D,
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// such as RGB888, RGB5A1
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#define CC_RGB_PREMULTIPLY_ALPHA(vr, vg, vb, va) \
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(unsigned)(((unsigned)((unsigned char)(vr) * ((unsigned char)(va) + 1)) >> 8) | \
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((unsigned)((unsigned char)(vg) * ((unsigned char)(va) + 1) >> 8) << 8) | \
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((unsigned)((unsigned char)(vb) * ((unsigned char)(va) + 1) >> 8) << 16) | \
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((unsigned)(unsigned char)(va) << 24))
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NS_CC_BEGIN
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/**
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* @addtogroup platform
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* @{
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*/
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/**
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@brief Structure which can tell where mipmap begins and how long is it
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*/
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typedef struct _MipmapInfo
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{
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unsigned char* address;
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int len;
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_MipmapInfo():address(NULL),len(0){}
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}MipmapInfo;
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class CC_DLL Image : public Ref
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{
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public:
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friend class TextureCache;
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/**
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* @js ctor
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*/
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Image();
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/**
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* @js NA
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* @lua NA
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*/
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virtual ~Image();
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/** Supported formats for Image */
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enum class Format
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{
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//! JPEG
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JPG,
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//! PNG
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PNG,
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//! TIFF
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TIFF,
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//! WebP
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WEBP,
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//! PVR
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PVR,
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//! ETC
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ETC,
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//! S3TC
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S3TC,
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//! ATITC
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ATITC,
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//! TGA
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TGA,
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//! Raw Data
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RAW_DATA,
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//! Unknown format
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UNKNOWN
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};
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/**
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* Enables or disables premultiplied alpha for PNG files.
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*
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* @param enabled (default: true)
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*/
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static void setPNGPremultipliedAlphaEnabled(bool enabled) { PNG_PREMULTIPLIED_ALPHA_ENABLED = enabled; }
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/** treats (or not) PVR files as if they have alpha premultiplied.
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Since it is impossible to know at runtime if the PVR images have the alpha channel premultiplied, it is
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possible load them as if they have (or not) the alpha channel premultiplied.
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By default it is disabled.
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*/
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static void setPVRImagesHavePremultipliedAlpha(bool haveAlphaPremultiplied);
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/**
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@brief Load the image from the specified path.
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@param path the absolute file path.
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@return true if loaded correctly.
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*/
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bool initWithImageFile(const std::string& path);
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/**
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@brief Load image from stream buffer.
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@param data stream buffer which holds the image data.
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@param dataLen data length expressed in (number of) bytes.
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@return true if loaded correctly.
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* @js NA
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* @lua NA
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*/
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bool initWithImageData(const unsigned char * data, ssize_t dataLen);
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// @warning kFmtRawData only support RGBA8888
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bool initWithRawData(const unsigned char * data, ssize_t dataLen, int width, int height, int bitsPerComponent, bool preMulti = false);
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// Getters
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unsigned char * getData() { return _data; }
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ssize_t getDataLen() { return _dataLen; }
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Format getFileType() { return _fileType; }
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backend::PixelFormat getPixelFormat() { return _pixelFormat; }
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int getWidth() { return _width; }
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int getHeight() { return _height; }
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int getNumberOfMipmaps() { return _numberOfMipmaps; }
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MipmapInfo* getMipmaps() { return _mipmaps; }
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bool hasPremultipliedAlpha() { return _hasPremultipliedAlpha; }
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std::string getFilePath() const { return _filePath; }
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int getBitPerPixel();
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bool hasAlpha();
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bool isCompressed();
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/**
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@brief Save Image data to the specified file, with specified format.
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@param filePath the file's absolute path, including file suffix.
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@param isToRGB whether the image is saved as RGB format.
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*/
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bool saveToFile(const std::string &filename, bool isToRGB = true);
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protected:
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bool initWithJpgData(const unsigned char * data, ssize_t dataLen);
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bool initWithPngData(const unsigned char * data, ssize_t dataLen);
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bool initWithTiffData(const unsigned char * data, ssize_t dataLen);
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bool initWithWebpData(const unsigned char * data, ssize_t dataLen);
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bool initWithPVRData(const unsigned char * data, ssize_t dataLen);
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bool initWithPVRv2Data(const unsigned char * data, ssize_t dataLen);
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bool initWithPVRv3Data(const unsigned char * data, ssize_t dataLen);
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bool initWithETCData(const unsigned char * data, ssize_t dataLen);
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bool initWithS3TCData(const unsigned char * data, ssize_t dataLen);
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bool initWithATITCData(const unsigned char *data, ssize_t dataLen);
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typedef struct sImageTGA tImageTGA;
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bool initWithTGAData(tImageTGA* tgaData);
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bool saveImageToPNG(const std::string& filePath, bool isToRGB = true);
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bool saveImageToJPG(const std::string& filePath);
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void premultipliedAlpha();
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protected:
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/**
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@brief Determine how many mipmaps can we have.
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It's same as define but it respects namespaces
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*/
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static const int MIPMAP_MAX = 16;
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/**
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@brief Determine whether we premultiply alpha for png files.
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*/
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static bool PNG_PREMULTIPLIED_ALPHA_ENABLED;
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unsigned char *_data;
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ssize_t _dataLen;
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int _width;
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int _height;
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bool _unpack;
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Format _fileType;
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backend::PixelFormat _pixelFormat;
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MipmapInfo _mipmaps[MIPMAP_MAX]; // pointer to mipmap images
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int _numberOfMipmaps;
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// false if we can't auto detect the image is premultiplied or not.
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bool _hasPremultipliedAlpha;
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std::string _filePath;
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protected:
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// noncopyable
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Image(const Image& rImg);
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Image& operator=(const Image&);
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/*
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@brief The same result as with initWithImageFile, but thread safe. It is caused by
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loadImage() in TextureCache.cpp.
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@param fullpath full path of the file.
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@param imageType the type of image, currently only supporting two types.
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@return true if loaded correctly.
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*/
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bool initWithImageFileThreadSafe(const std::string& fullpath);
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Format detectFormat(const unsigned char * data, ssize_t dataLen);
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bool isPng(const unsigned char * data, ssize_t dataLen);
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bool isJpg(const unsigned char * data, ssize_t dataLen);
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bool isTiff(const unsigned char * data, ssize_t dataLen);
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bool isWebp(const unsigned char * data, ssize_t dataLen);
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bool isPvr(const unsigned char * data, ssize_t dataLen);
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bool isEtc(const unsigned char * data, ssize_t dataLen);
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bool isS3TC(const unsigned char * data,ssize_t dataLen);
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bool isATITC(const unsigned char *data, ssize_t dataLen);
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};
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// end of platform group
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/// @}
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NS_CC_END
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/// @endcond
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#endif // __CC_IMAGE_H__
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