74 lines
3 KiB
C
74 lines
3 KiB
C
|
/**
|
||
|
|
* PANDA 3D SOFTWARE
|
||
|
|
* Copyright (c) Carnegie Mellon University. All rights reserved.
|
||
|
|
*
|
||
|
|
* All use of this software is subject to the terms of the revised BSD
|
||
|
|
* license. You should have received a copy of this license along
|
||
|
|
* with this source code in a file named "LICENSE."
|
||
|
|
*
|
||
|
|
* @file convert_srgb.h
|
||
|
|
* @author rdb
|
||
|
|
* @date 2014-11-13
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef CONVERT_SRGB_H
|
||
|
|
#define CONVERT_SRGB_H
|
||
|
|
|
||
|
|
#include "pandabase.h"
|
||
|
|
#include "luse.h"
|
||
|
|
#include "pnmimage_base.h"
|
||
|
|
|
||
|
|
// The below functions can encode and decode sRGB colors in various
|
||
|
|
// representations. Some of them are implemented using look-up tables, some
|
||
|
|
// others using SSE2 intrinsics.
|
||
|
|
extern EXPCL_PANDA_PNMIMAGE const unsigned char to_srgb8_table[256];
|
||
|
|
extern EXPCL_PANDA_PNMIMAGE const unsigned char to_linear_uchar_table[256];
|
||
|
|
extern EXPCL_PANDA_PNMIMAGE const float to_linear_float_table[256];
|
||
|
|
|
||
|
|
BEGIN_PUBLISH
|
||
|
|
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE float decode_sRGB_float(unsigned char val);
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE float decode_sRGB_float(float val);
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE unsigned char decode_sRGB_uchar(unsigned char val);
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE unsigned char decode_sRGB_uchar(float val);
|
||
|
|
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE float encode_sRGB_float(unsigned char val);
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE float encode_sRGB_float(float val);
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE unsigned char encode_sRGB_uchar(unsigned char val);
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE unsigned char encode_sRGB_uchar(float val);
|
||
|
|
|
||
|
|
END_PUBLISH
|
||
|
|
|
||
|
|
// These functions convert more than one component in one go, which can be
|
||
|
|
// faster due to vectorization.
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE void encode_sRGB_uchar(const LColorf &from,
|
||
|
|
xel &into);
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE void encode_sRGB_uchar(const LColorf &from,
|
||
|
|
xel &into, xelval &into_alpha);
|
||
|
|
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE void encode_sRGB_uchar(const LColord &from,
|
||
|
|
xel &into);
|
||
|
|
EXPCL_PANDA_PNMIMAGE INLINE void encode_sRGB_uchar(const LColord &from,
|
||
|
|
xel &into, xelval &into_alpha);
|
||
|
|
|
||
|
|
// Use these functions if you know that SSE2 support is available. Otherwise,
|
||
|
|
// they will crash!
|
||
|
|
#if defined(__SSE2__) || defined(__i386__) || defined(_M_IX86) || defined(_M_X64) || defined(_M_AMD64)
|
||
|
|
EXPCL_PANDA_PNMIMAGE unsigned char encode_sRGB_uchar_sse2(float val);
|
||
|
|
EXPCL_PANDA_PNMIMAGE void encode_sRGB_uchar_sse2(const LColorf &from,
|
||
|
|
xel &into);
|
||
|
|
EXPCL_PANDA_PNMIMAGE void encode_sRGB_uchar_sse2(const LColorf &from,
|
||
|
|
xel &into, xelval &into_alpha);
|
||
|
|
|
||
|
|
// Use the following to find out if you can call either of the above.
|
||
|
|
EXPCL_PANDA_PNMIMAGE bool has_sse2_sRGB_encode();
|
||
|
|
#else
|
||
|
|
// The target architecture can't support the SSE2 extension at all.
|
||
|
|
#define encode_sRGB_uchar_sse2 encode_sRGB_uchar
|
||
|
|
#define has_sse2_sRGB_encode() (false)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include "convert_srgb.I"
|
||
|
|
|
||
|
|
#endif
|