/* * Mesa 3-D graphics library * Version: 7.3 * * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. * * 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 * BRIAN PAUL 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. */ /** * \file colormac.h * Color-related macros */ #ifndef COLORMAC_H #define COLORMAC_H #include "imports.h" #include "config.h" #include "macros.h" /** \def BYTE_TO_CHAN * Convert from GLbyte to GLchan */ /** \def UBYTE_TO_CHAN * Convert from GLubyte to GLchan */ /** \def SHORT_TO_CHAN * Convert from GLshort to GLchan */ /** \def USHORT_TO_CHAN * Convert from GLushort to GLchan */ /** \def INT_TO_CHAN * Convert from GLint to GLchan */ /** \def UINT_TO_CHAN * Convert from GLuint to GLchan */ /** \def CHAN_TO_UBYTE * Convert from GLchan to GLubyte */ /** \def CHAN_TO_FLOAT * Convert from GLchan to GLfloat */ /** \def CLAMPED_FLOAT_TO_CHAN * Convert from GLclampf to GLchan */ /** \def UNCLAMPED_FLOAT_TO_CHAN * Convert from GLfloat to GLchan */ /** \def COPY_CHAN4 * Copy a GLchan[4] array */ #if CHAN_BITS == 8 #define BYTE_TO_CHAN(b) ((b) < 0 ? 0 : (GLchan) (b)) #define UBYTE_TO_CHAN(b) (b) #define SHORT_TO_CHAN(s) ((s) < 0 ? 0 : (GLchan) ((s) >> 7)) #define USHORT_TO_CHAN(s) ((GLchan) ((s) >> 8)) #define INT_TO_CHAN(i) ((i) < 0 ? 0 : (GLchan) ((i) >> 23)) #define UINT_TO_CHAN(i) ((GLchan) ((i) >> 24)) #define CHAN_TO_UBYTE(c) (c) #define CHAN_TO_FLOAT(c) UBYTE_TO_FLOAT(c) #define CLAMPED_FLOAT_TO_CHAN(c, f) CLAMPED_FLOAT_TO_UBYTE(c, f) #define UNCLAMPED_FLOAT_TO_CHAN(c, f) UNCLAMPED_FLOAT_TO_UBYTE(c, f) #define COPY_CHAN4(DST, SRC) COPY_4UBV(DST, SRC) #elif CHAN_BITS == 16 #define BYTE_TO_CHAN(b) ((b) < 0 ? 0 : (((GLchan) (b)) * 516)) #define UBYTE_TO_CHAN(b) ((((GLchan) (b)) << 8) | ((GLchan) (b))) #define SHORT_TO_CHAN(s) ((s) < 0 ? 0 : (GLchan) (s)) #define USHORT_TO_CHAN(s) (s) #define INT_TO_CHAN(i) ((i) < 0 ? 0 : (GLchan) ((i) >> 15)) #define UINT_TO_CHAN(i) ((GLchan) ((i) >> 16)) #define CHAN_TO_UBYTE(c) ((c) >> 8) #define CHAN_TO_FLOAT(c) ((GLfloat) ((c) * (1.0 / CHAN_MAXF))) #define CLAMPED_FLOAT_TO_CHAN(c, f) CLAMPED_FLOAT_TO_USHORT(c, f) #define UNCLAMPED_FLOAT_TO_CHAN(c, f) UNCLAMPED_FLOAT_TO_USHORT(c, f) #define COPY_CHAN4(DST, SRC) COPY_4V(DST, SRC) #elif CHAN_BITS == 32 /* XXX floating-point color channels not fully thought-out */ #define BYTE_TO_CHAN(b) ((GLfloat) ((b) * (1.0F / 127.0F))) #define UBYTE_TO_CHAN(b) ((GLfloat) ((b) * (1.0F / 255.0F))) #define SHORT_TO_CHAN(s) ((GLfloat) ((s) * (1.0F / 32767.0F))) #define USHORT_TO_CHAN(s) ((GLfloat) ((s) * (1.0F / 65535.0F))) #define INT_TO_CHAN(i) ((GLfloat) ((i) * (1.0F / 2147483647.0F))) #define UINT_TO_CHAN(i) ((GLfloat) ((i) * (1.0F / 4294967295.0F))) #define CHAN_TO_UBYTE(c) FLOAT_TO_UBYTE(c) #define CHAN_TO_FLOAT(c) (c) #define CLAMPED_FLOAT_TO_CHAN(c, f) c = (f) #define UNCLAMPED_FLOAT_TO_CHAN(c, f) c = (f) #define COPY_CHAN4(DST, SRC) COPY_4V(DST, SRC) #else #error unexpected CHAN_BITS size #endif /** * Convert 3 channels at once. * * \param dst pointer to destination GLchan[3] array. * \param f pointer to source GLfloat[3] array. * * \sa #UNCLAMPED_FLOAT_TO_CHAN. */ #define UNCLAMPED_FLOAT_TO_RGB_CHAN(dst, f) \ do { \ UNCLAMPED_FLOAT_TO_CHAN(dst[0], f[0]); \ UNCLAMPED_FLOAT_TO_CHAN(dst[1], f[1]); \ UNCLAMPED_FLOAT_TO_CHAN(dst[2], f[2]); \ } while (0) /** * Convert 4 channels at once. * * \param dst pointer to destination GLchan[4] array. * \param f pointer to source GLfloat[4] array. * * \sa #UNCLAMPED_FLOAT_TO_CHAN. */ #define UNCLAMPED_FLOAT_TO_RGBA_CHAN(dst, f) \ do { \ UNCLAMPED_FLOAT_TO_CHAN(dst[0], f[0]); \ UNCLAMPED_FLOAT_TO_CHAN(dst[1], f[1]); \ UNCLAMPED_FLOAT_TO_CHAN(dst[2], f[2]); \ UNCLAMPED_FLOAT_TO_CHAN(dst[3], f[3]); \ } while (0) /** * \name Generic color packing macros. All inputs should be GLubytes. * * \todo We may move these into texstore.h at some point. */ /*@{*/ #define PACK_COLOR_8888( X, Y, Z, W ) \ (((X) << 24) | ((Y) << 16) | ((Z) << 8) | (W)) #define PACK_COLOR_8888_REV( X, Y, Z, W ) \ (((W) << 24) | ((Z) << 16) | ((Y) << 8) | (X)) #define PACK_COLOR_888( X, Y, Z ) \ (((X) << 16) | ((Y) << 8) | (Z)) #define PACK_COLOR_565( X, Y, Z ) \ ((((X) & 0xf8) << 8) | (((Y) & 0xfc) << 3) | (((Z) & 0xf8) >> 3)) #define PACK_COLOR_565_REV( X, Y, Z ) \ (((X) & 0xf8) | ((Y) & 0xe0) >> 5 | (((Y) & 0x1c) << 11) | (((Z) & 0xf8) << 5)) #define PACK_COLOR_5551( R, G, B, A ) \ ((((R) & 0xf8) << 8) | (((G) & 0xf8) << 3) | (((B) & 0xf8) >> 2) | \ ((A) ? 1 : 0)) #define PACK_COLOR_1555( A, B, G, R ) \ ((((B) & 0xf8) << 7) | (((G) & 0xf8) << 2) | (((R) & 0xf8) >> 3) | \ ((A) ? 0x8000 : 0)) #define PACK_COLOR_1555_REV( A, B, G, R ) \ ((((B) & 0xf8) >> 1) | (((G) & 0xc0) >> 6) | (((G) & 0x38) << 10) | (((R) & 0xf8) << 5) | \ ((A) ? 0x80 : 0)) #define PACK_COLOR_4444( R, G, B, A ) \ ((((R) & 0xf0) << 8) | (((G) & 0xf0) << 4) | ((B) & 0xf0) | ((A) >> 4)) #define PACK_COLOR_4444_REV( R, G, B, A ) \ ((((B) & 0xf0) << 8) | (((A) & 0xf0) << 4) | ((R) & 0xf0) | ((G) >> 4)) #define PACK_COLOR_88( L, A ) \ (((L) << 8) | (A)) #define PACK_COLOR_88_REV( L, A ) \ (((A) << 8) | (L)) #define PACK_COLOR_332( R, G, B ) \ (((R) & 0xe0) | (((G) & 0xe0) >> 3) | (((B) & 0xc0) >> 6)) #define PACK_COLOR_233( B, G, R ) \ (((B) & 0xc0) | (((G) & 0xe0) >> 2) | (((R) & 0xe0) >> 5)) /*@}*/ #endif /* COLORMAC_H */