/**************************************************************************** Copyright (c) 2010-2012 cocos2d-x.org Copyright (c) 2013-2016 Chukong Technologies Inc. Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd. Copyright (c) 2020 C4games Ltd Copyright (c) 2021-2022 Bytedance Inc. https://axis-project.github.io/ 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__ #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)((uint8_t)(vr) * ((uint8_t)(va) + 1)) >> 8) | \ ((unsigned)((uint8_t)(vg) * ((uint8_t)(va) + 1) >> 8) << 8) | \ ((unsigned)((uint8_t)(vb) * ((uint8_t)(va) + 1) >> 8) << 16) | ((unsigned)(uint8_t)(va) << 24)) NS_CC_BEGIN /** * @addtogroup platform * @{ */ /** @brief Structure which can tell where mipmap begins and how long is it */ typedef struct _MipmapInfo { uint8_t* address; int len; _MipmapInfo() : address(NULL), len(0) {} } MipmapInfo; /** The Image class for loading all images supported by axis . */ 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, //! BMP, BMP, //! WebP WEBP, //! PVR PVR, //! ETC1 ETC1, //! ETC2 ETC2, //! S3TC S3TC, //! ATITC ATITC, //! TGA TGA, //! ASTC ASTC, //! Raw Data RAW_DATA, //! Unknown format UNKNOWN }; struct CompressedImagePMAFlag { enum : uint32_t { ASTC = 1, DUAL_SAMPLER = 1 << 1, // for dual sampler, such as ETC1_RGB + ETC1_Alpha ETC2 = 1 << 2, PVR = 1 << 3, ALL = 0xffff, }; }; /** * Enables or disables premultiplied alpha for PNG files. * * @param enabled (default: true) */ static void setPNGPremultipliedAlphaEnabled(bool enabled) { PNG_PREMULTIPLIED_ALPHA_ENABLED = enabled; } /** The new APIs to treats (or not) compressed image files as if they have alpha premultiplied. * * By default, ETC1 + ETC1_ALPHA is enabled, because we do PMA at shader etc1.frag * !!!IMPORTANT: * The spine-runtimes official always regard texture has PMA, so you needs * do compressed images PMA at texture convert tools or GPU fragment shader, such as * positionTexture.frag, positionTextureColor.frag and others which have texture sampler, * otherwise, the spine animations can't be render properly */ static void setCompressedImagesHavePMA(uint32_t targets, bool havePMA); static bool isCompressedImageHavePMA(uint32_t target); /** @brief Load the image from the specified path. @param path the absolute file path. @return true if loaded correctly. */ bool initWithImageFile(std::string_view 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. @param ownData whether take the data memory management. @return true if loaded correctly. * @js NA * @lua NA */ bool initWithImageData(const uint8_t* data, ssize_t dataLen); bool initWithImageData(uint8_t* data, ssize_t dataLen, bool ownData); // @warning kFmtRawData only support RGBA8888 bool initWithRawData(const uint8_t* data, ssize_t dataLen, int width, int height, int bitsPerComponent, bool preMulti = false); // Getters uint8_t* 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(std::string_view filename, bool isToRGB = true); void premultiplyAlpha(); void reversePremultipliedAlpha(); protected: typedef struct sImageTGA tImageTGA; bool initWithJpgData(uint8_t* data, ssize_t dataLen); bool initWithPngData(uint8_t* data, ssize_t dataLen); bool initWithBmpData(uint8_t* data, ssize_t dataLen); bool initWithWebpData(uint8_t* data, ssize_t dataLen); bool initWithTGAData(tImageTGA* tgaData); // All internal init function have chance to own the data for fast forward data to hardware decoder // see: initWithImageData bool initWithPVRData(uint8_t* data, ssize_t dataLen, bool ownData); bool initWithPVRv2Data(uint8_t* data, ssize_t dataLen, bool ownData); bool initWithPVRv3Data(uint8_t* data, ssize_t dataLen, bool ownData); bool initWithETCData(uint8_t* data, ssize_t dataLen, bool ownData); bool initWithETC2Data(uint8_t* data, ssize_t dataLen, bool ownData); bool initWithASTCData(uint8_t* data, ssize_t dataLen, bool ownData); bool initWithS3TCData(uint8_t* data, ssize_t dataLen, bool ownData); bool initWithATITCData(uint8_t* data, ssize_t dataLen, bool ownData); // fast forward pixels to GPU if ownData void forwardPixels(uint8_t* data, ssize_t dataLen, int offset, bool ownData); bool saveImageToPNG(std::string_view filePath, bool isToRGB = true); bool saveImageToJPG(std::string_view 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; static uint32_t COMPRESSED_IMAGE_PMA_FLAGS; uint8_t* _data; ssize_t _dataLen; ssize_t _offset; // useful for hardware decoder present to hold data without copy 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(std::string_view fullpath); Format detectFormat(const uint8_t* data, ssize_t dataLen); bool isPng(const uint8_t* data, ssize_t dataLen); bool isJpg(const uint8_t* data, ssize_t dataLen); bool isBmp(const uint8_t* data, ssize_t dataLen); bool isWebp(const uint8_t* data, ssize_t dataLen); bool isPvr(const uint8_t* data, ssize_t dataLen); bool isEtc1(const uint8_t* data, ssize_t dataLen); bool isEtc2(const uint8_t* data, ssize_t dataLen); bool isS3TC(const uint8_t* data, ssize_t dataLen); bool isASTC(const uint8_t* data, ssize_t dataLen); }; // end of platform group /// @} NS_CC_END #endif // __CC_IMAGE_H__