axmol/cocos/platform/CCImage.h

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/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
http://www.cocos2d-x.org
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#ifndef __CC_IMAGE_H__
#define __CC_IMAGE_H__
/// @cond DO_NOT_SHOW
#include "base/CCRef.h"
#include "renderer/CCTexture2D.h"
#include "base/CCData.h"
// premultiply alpha, or the effect will be wrong when using other pixel formats in Texture2D,
// such as RGB888, RGB5A1
#define CC_RGB_PREMULTIPLY_ALPHA(vr, vg, vb, va) \
(unsigned)(((unsigned)((unsigned char)(vr) * ((unsigned char)(va) + 1)) >> 8) | \
((unsigned)((unsigned char)(vg) * ((unsigned char)(va) + 1) >> 8) << 8) | \
((unsigned)((unsigned char)(vb) * ((unsigned char)(va) + 1) >> 8) << 16) | \
((unsigned)(unsigned char)(va) << 24))
NS_CC_BEGIN
/**
* @addtogroup platform
* @{
*/
/**
@brief Structure which can tell where mipmap begins and how long is it
*/
typedef struct _MipmapInfo
{
unsigned char* address;
int len;
_MipmapInfo():address(NULL),len(0){}
}MipmapInfo;
class CC_DLL Image : public Ref
{
public:
friend class TextureCache;
/**
* @js ctor
*/
Image();
/**
* @js NA
* @lua NA
*/
virtual ~Image();
/** Supported formats for Image */
enum class Format
{
//! JPEG
JPG,
//! PNG
PNG,
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//! BMP,
BMP,
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//! WebP
WEBP,
//! PVR
PVR,
//! ETC
ETC,
//! S3TC
S3TC,
//! ATITC
ATITC,
//! TGA
TGA,
//<2F><>ASTC
ASTC,
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//! Raw Data
RAW_DATA,
//! Unknown format
UNKNOWN
};
/**
* Enables or disables premultiplied alpha for PNG files.
*
* @param enabled (default: true)
*/
static void setPNGPremultipliedAlphaEnabled(bool enabled) { PNG_PREMULTIPLIED_ALPHA_ENABLED = enabled; }
/** treats (or not) PVR files as if they have alpha premultiplied.
Since it is impossible to know at runtime if the PVR images have the alpha channel premultiplied, it is
possible load them as if they have (or not) the alpha channel premultiplied.
By default it is disabled.
*/
static void setPVRImagesHavePremultipliedAlpha(bool haveAlphaPremultiplied);
/**
@brief Load the image from the specified path.
@param path the absolute file path.
@return true if loaded correctly.
*/
bool initWithImageFile(const std::string& path);
/**
@brief Load image from stream buffer.
@param data stream buffer which holds the image data.
@param dataLen data length expressed in (number of) bytes.
@return true if loaded correctly.
* @js NA
* @lua NA
*/
bool initWithImageData(const unsigned char * data, ssize_t dataLen, bool ownData = false);
// @warning kFmtRawData only support RGBA8888
bool initWithRawData(const unsigned char * data, ssize_t dataLen, int width, int height, int bitsPerComponent, bool preMulti = false);
// Getters
unsigned char * getData() { return _data + _offset; }
ssize_t getDataLen() { return _dataLen - _offset; }
Format getFileType() { return _fileType; }
backend::PixelFormat getPixelFormat() { return _pixelFormat; }
int getWidth() { return _width; }
int getHeight() { return _height; }
int getNumberOfMipmaps() { return _numberOfMipmaps; }
MipmapInfo* getMipmaps() { return _mipmaps; }
bool hasPremultipliedAlpha() { return _hasPremultipliedAlpha; }
std::string getFilePath() const { return _filePath; }
int getBitPerPixel();
bool hasAlpha();
bool isCompressed();
/**
@brief Save Image data to the specified file, with specified format.
@param filePath the file's absolute path, including file suffix.
@param isToRGB whether the image is saved as RGB format.
*/
bool saveToFile(const std::string &filename, bool isToRGB = true);
void premultiplyAlpha();
void reversePremultipliedAlpha();
protected:
bool initWithJpgData(const unsigned char * data, ssize_t dataLen);
bool initWithPngData(const unsigned char * data, ssize_t dataLen);
bool initWithBmpData(const unsigned char *data, ssize_t dataLen);
bool initWithWebpData(const unsigned char * data, ssize_t dataLen);
bool initWithPVRData(const unsigned char * data, ssize_t dataLen);
bool initWithPVRv2Data(const unsigned char * data, ssize_t dataLen);
bool initWithPVRv3Data(const unsigned char * data, ssize_t dataLen);
bool initWithETCData(const unsigned char* data, ssize_t dataLen, bool ownData);
bool initWithS3TCData(const unsigned char * data, ssize_t dataLen);
bool initWithATITCData(const unsigned char *data, ssize_t dataLen);
bool initWithASTCData(const unsigned char* data, ssize_t dataLen, bool ownData);
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typedef struct sImageTGA tImageTGA;
bool initWithTGAData(tImageTGA* tgaData);
bool saveImageToPNG(const std::string& filePath, bool isToRGB = true);
bool saveImageToJPG(const std::string& filePath);
protected:
/**
@brief Determine how many mipmaps can we have.
It's same as define but it respects namespaces
*/
static const int MIPMAP_MAX = 16;
/**
@brief Determine whether we premultiply alpha for png files.
*/
static bool PNG_PREMULTIPLIED_ALPHA_ENABLED;
unsigned char *_data;
ssize_t _dataLen;
ssize_t _offset;
int _width;
int _height;
bool _unpack;
Format _fileType;
backend::PixelFormat _pixelFormat;
MipmapInfo _mipmaps[MIPMAP_MAX]; // pointer to mipmap images
int _numberOfMipmaps;
// false if we can't auto detect the image is premultiplied or not.
bool _hasPremultipliedAlpha;
std::string _filePath;
protected:
// noncopyable
Image(const Image& rImg);
Image& operator=(const Image&);
/*
@brief The same result as with initWithImageFile, but thread safe. It is caused by
loadImage() in TextureCache.cpp.
@param fullpath full path of the file.
@param imageType the type of image, currently only supporting two types.
@return true if loaded correctly.
*/
bool initWithImageFileThreadSafe(const std::string& fullpath);
Format detectFormat(const unsigned char * data, ssize_t dataLen);
bool isPng(const unsigned char * data, ssize_t dataLen);
bool isJpg(const unsigned char * data, ssize_t dataLen);
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bool isBmp(const unsigned char * data, ssize_t dataLen);
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bool isWebp(const unsigned char * data, ssize_t dataLen);
bool isPvr(const unsigned char * data, ssize_t dataLen);
bool isEtc(const unsigned char * data, ssize_t dataLen);
bool isS3TC(const unsigned char * data,ssize_t dataLen);
bool isATITC(const unsigned char *data, ssize_t dataLen);
bool isASTC(const unsigned char* data, ssize_t dataLen);
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};
// end of platform group
/// @}
NS_CC_END
/// @endcond
#endif // __CC_IMAGE_H__