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- /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
- * Copyright (C) 2011 D. R. Commander. All Rights Reserved.
- * Copyright 2009-2022 Pierre Ossman for Cendio AB
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
- //
- // PixelFormat - structure to represent a pixel format. Also has useful
- // methods for reading & writing to streams, etc. Conversion to and from
- // other formats are also handled by this class. We have three different
- // representations that we refer to:
- //
- // a) Pixels - Unsigned native integers in the format specified by this
- // PixelFormat object.
- // b) Buffer - Same thing as pixels, but in the appropriate byte stream
- // format. This involves endian conversion and padding.
- // c) RGB - A byte stream of 8 bit red, green and blue elements, in that
- // order.
- //
-
- #ifndef __RFB_PIXELFORMAT_H__
- #define __RFB_PIXELFORMAT_H__
-
- #include <rfb/Pixel.h>
-
- namespace rdr { class InStream; class OutStream; }
-
- namespace rfb {
-
- class PixelFormat {
- public:
- PixelFormat(int b, int d, bool e, bool t,
- int rm, int gm, int bm, int rs, int gs, int bs);
- PixelFormat();
-
- // Checks if the formats have identical buffer representation.
- // They might still have different pixel representation, endianness
- // or true colour state.
- bool equal(const PixelFormat& other) const;
-
- void read(rdr::InStream* is);
- void write(rdr::OutStream* os) const;
-
- bool is888(void) const;
- bool isBigEndian(void) const;
- bool isLittleEndian(void) const;
-
- inline Pixel pixelFromBuffer(const uint8_t* buffer) const;
- inline void bufferFromPixel(uint8_t* buffer, Pixel pixel) const;
-
- inline Pixel pixelFromRGB(uint16_t red, uint16_t green, uint16_t blue) const;
- inline Pixel pixelFromRGB(uint8_t red, uint8_t green, uint8_t blue) const;
-
- void bufferFromRGB(uint8_t *dst, const uint8_t* src, int pixels) const;
- void bufferFromRGB(uint8_t *dst, const uint8_t* src,
- int w, int stride, int h) const;
-
- inline void rgbFromPixel(Pixel pix, uint16_t *r, uint16_t *g, uint16_t *b) const;
- inline void rgbFromPixel(Pixel pix, uint8_t *r, uint8_t *g, uint8_t *b) const;
-
- void rgbFromBuffer(uint8_t* dst, const uint8_t* src, int pixels) const;
- void rgbFromBuffer(uint8_t* dst, const uint8_t* src,
- int w, int stride, int h) const;
-
- Pixel pixelFromPixel(const PixelFormat &srcPF, Pixel src) const;
-
- void bufferFromBuffer(uint8_t* dst, const PixelFormat &srcPF,
- const uint8_t* src, int pixels) const;
- void bufferFromBuffer(uint8_t* dst, const PixelFormat &srcPF,
- const uint8_t* src, int w, int h,
- int dstStride, int srcStride) const;
-
- void print(char* str, int len) const;
- bool parse(const char* str);
-
- protected:
- void updateState(void);
- bool isSane(void);
-
- private:
- // Templated, optimised methods
- template<class T>
- void directBufferFromBufferFrom888(T* dst, const PixelFormat &srcPF,
- const uint8_t* src, int w, int h,
- int dstStride, int srcStride) const;
- template<class T>
- void directBufferFromBufferTo888(uint8_t* dst, const PixelFormat &srcPF,
- const T* src, int w, int h,
- int dstStride, int srcStride) const;
-
- public:
- int bpp;
- int depth;
-
- // This only tracks if the client thinks it is in colour map mode.
- // In practice we are always in true colour mode.
- bool trueColour;
-
- protected:
- bool bigEndian;
- int redMax;
- int greenMax;
- int blueMax;
- int redShift;
- int greenShift;
- int blueShift;
-
- protected:
- /* Pre-computed values to keep algorithms simple */
- int redBits, greenBits, blueBits;
- int maxBits, minBits;
- bool endianMismatch;
-
- static uint8_t upconvTable[256*8];
- static uint8_t downconvTable[256*8];
-
- class Init;
- friend class Init;
- static Init _init;
-
- /* Only for testing this class */
- friend void makePixel(const rfb::PixelFormat &, uint8_t *);
- friend bool verifyPixel(const rfb::PixelFormat &,
- const rfb::PixelFormat &,
- const uint8_t *);
- };
- }
-
- #include <rfb/PixelFormat.inl>
-
- #endif
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