rgb.h
上传用户:dangjiwu
上传日期:2013-07-19
资源大小:42019k
文件大小:12k
- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: rgb.h,v 1.3.8.1 2004/07/09 01:59:56 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef __RGB_H__
- #define __RGB_H__ 1
- #ifdef __cplusplus
- extern "C" {
- #endif
- /*
- * RGB formats supported:
- *
- * RGB32 - 32-bit 8:8:8 RGB
- * BGR32 - 32-bit 8:8:8 RGB (R&B swapped)
- * RGB24 - 24-bit 8:8:8 RGB
- * RGB565 - 16-bit 5:6:5 RGB
- * RGB555 - 16-bit 5:5:5 RGB
- * RGB8 - 8-bit palettized RGB
- */
- #define RGB32_ID 0
- #define BGR32_ID 1
- #define RGB24_ID 2
- #define RGB565_ID 3
- #define RGB555_ID 4
- #define RGB8_ID 5
- #define RGB_FORMATS 6
- /*
- * Generic format ID:
- */
- #define ID(f) f##_ID
- /*
- * Bytes per pixel (bpp) constants:
- */
- #define RGB32_BPP 4
- #define BGR32_BPP 4
- #define RGB24_BPP 3
- #define RGB565_BPP 2
- #define RGB555_BPP 2
- #define RGB8_BPP 1
- /*
- * Generic pixel depth:
- */
- #define BPP(f) f##_BPP
- /*
- * Internal pixel representations.
- * We will use 3 different types of temporary pixel variables
- * based on the following classification:
- * 1. Pixels with power of 2-aligned depth and bit-packed RGB fields:
- * RGB32,BGR32,RGB565,RGB555 - use 1 full register to store RGB fields
- * (we will use name RGBX for generalized macros dealing
- * with these formats)
- * 2. Pixels with misaligned depth:
- * RGB24 - use 3 8-bit registers to store R,G,and B components
- * 3. Paletized pixels:
- * RGB8 - use 1 full register to store palette index
- */
- #define RGBX_PIXEL(a) register unsigned int a##_rgb
- #define RGB32_PIXEL(a) RGBX_PIXEL(a)
- #define BGR32_PIXEL(a) RGBX_PIXEL(a)
- #define RGB24_PIXEL(a) register unsigned char a##_b, a##_g, a##_r
- #define RGB565_PIXEL(a) RGBX_PIXEL(a)
- #define RGB555_PIXEL(a) RGBX_PIXEL(a)
- #define RGB8_PIXEL(a) register unsigned int a##_idx
- /*
- * Generic pixel declaration:
- */
- #define PIXEL(f,a) f##_PIXEL(a)
- /*
- * Load/store/copy pixel macros:
- * (s/d - source/destination pointers; sa/da - source/dest. pixel vars)
- */
- #define RGBX_LOAD(s,a,t) a##_rgb=*(t*)(s)
- #define RGBX_STORE(d,a,t) *(t*)(d)=a##_rgb
- #define RGBX_COPY(da,sa) da##_rgb=sa##_rgb
- #define RGB32_LOAD(s,a) RGBX_LOAD(s,a,unsigned int)
- #define RGB32_STORE(d,a) RGBX_STORE(d,a,unsigned int)
- #define RGB32_COPY(da,sa) RGBX_COPY(da,sa)
- #define BGR32_LOAD(s,a) RGBX_LOAD(s,a,unsigned int)
- #define BGR32_STORE(d,a) RGBX_STORE(d,a,unsigned int)
- #define BGR32_COPY(da,sa) RGBX_COPY(da,sa)
- #define RGB24_LOAD(s,a) a##_b=(s)[0], a##_g=(s)[1], a##_r=(s)[2]
- #define RGB24_STORE(d,a) (d)[0]=a##_b, (d)[1]=a##_g, (d)[2]=a##_r
- #define RGB24_COPY(da,sa) da##_b=sa##_b, da##_g=sa##_g, da##_r=sa##_r
- #define RGB565_LOAD(s,a) RGBX_LOAD(s,a,unsigned short)
- #define RGB565_STORE(d,a) RGBX_STORE(d,a,unsigned short)
- #define RGB565_COPY(da,sa) RGBX_COPY(da,sa)
- #define RGB555_LOAD(s,a) RGBX_LOAD(s,a,unsigned short)
- #define RGB555_STORE(d,a) RGBX_STORE(d,a,unsigned short)
- #define RGB555_COPY(da,sa) RGBX_COPY(da,sa)
- #define RGB8_LOAD(s,a) a##_idx=(s)[0]
- #define RGB8_STORE(d,a) (d)[0]=a##_idx
- #define RGB8_COPY(da,sa) da##_idx=sa##_idx
- /*
- * Generic pixel load/store/copy macros:
- */
- #define LOAD(f,s,a) f##_LOAD(s,a)
- #define STORE(f,d,a) f##_STORE(d,a)
- #define COPY(f,da,sa) f##_COPY(da,sa)
- /*
- * R,G,B fields bit-packing:
- * (RGB32,BGR32,RGB565,and RGB555 formats only)
- */
- #define RGB32_R_START 16
- #define RGB32_R_BITS 8
- #define RGB32_G_START 8
- #define RGB32_G_BITS 8
- #define RGB32_B_START 0
- #define RGB32_B_BITS 8
- #define BGR32_R_START 0
- #define BGR32_R_BITS 8
- #define BGR32_G_START 8
- #define BGR32_G_BITS 8
- #define BGR32_B_START 16
- #define BGR32_B_BITS 8
- #define RGB565_R_START 11
- #define RGB565_R_BITS 5
- #define RGB565_G_START 5
- #define RGB565_G_BITS 6
- #define RGB565_B_START 0
- #define RGB565_B_BITS 5
- #define RGB555_R_START 10
- #define RGB555_R_BITS 5
- #define RGB555_G_START 5
- #define RGB555_G_BITS 5
- #define RGB555_B_START 0
- #define RGB555_B_BITS 5
- /*
- * Generic bit-packing macros:
- */
- #define START(f,x) f##_##x##_START
- #define BITS(f,x) f##_##x##_BITS
- /*
- * Fields extraction/assignment macros.
- *
- * Here we will largely rely on compiler's ability to get rid of
- * unexecuted branches and glue subsequent constant shifts and
- * masks together. This assumption works well for MSVC, Watcom,
- * and Zortech (Symantec) compilers, but some others may fail.
- *
- * If you are using compiler not listed above, please check the
- * assembly output to make sure that the code is well optimized.
- * If the compiler leaves comparisons and multiple shifts/masks
- * in places of RGBX_GET_X() and RGBX_SET(), you would have to
- * reimplement and optimize all these instances manually, using
- * the appropriate pixel/field-type related constants.
- */
- #define NORM(s) ((s) & 0x1F) /* shuts compiler up */
- #define RGBX_GET_X(f,x,a)
- ((START(f,x)+BITS(f,x)<8)
- ? ((a##_rgb << NORM(8-(START(f,x)+BITS(f,x)))) & (0x100-(1U<<(8-BITS(f,x)))))
- : ((a##_rgb >> NORM((START(f,x)+BITS(f,x))-8)) & (0x100-(1U<<(8-BITS(f,x))))))
- #define RGBX_X(f,x,v)
- ((START(f,x)+BITS(f,x)<8)
- ? (((v) & (0x100-(1U<<(8-BITS(f,x))))) >> NORM(8-(START(f,x)+BITS(f,x))))
- : (((v) & (0x100-(1U<<(8-BITS(f,x))))) << NORM((START(f,x)+BITS(f,x))-8)))
- #define RGBX_SET(f,a,r,g,b)
- a##_rgb = RGBX_X(f,R,r) | RGBX_X(f,G,g) | RGBX_X(f,B,b)
- #define RGB32_GET_R(a) RGBX_GET_X(RGB32,R,a)
- #define RGB32_GET_G(a) RGBX_GET_X(RGB32,G,a)
- #define RGB32_GET_B(a) RGBX_GET_X(RGB32,B,a)
- #define RGB32_SET(a,r,g,b) RGBX_SET( RGB32,a,r,g,b)
- #define BGR32_GET_R(a) RGBX_GET_X(BGR32,R,a)
- #define BGR32_GET_G(a) RGBX_GET_X(BGR32,G,a)
- #define BGR32_GET_B(a) RGBX_GET_X(BGR32,B,a)
- #define BGR32_SET(a,r,g,b) RGBX_SET( BGR32,a,r,g,b)
- #define RGB24_GET_R(a) (a##_r)
- #define RGB24_GET_G(a) (a##_g)
- #define RGB24_GET_B(a) (a##_b)
- #define RGB24_SET(a,r,g,b) a##_b=(b), a##_g=(g), a##_r=(r)
- #define RGB565_GET_R(a) RGBX_GET_X(RGB565,R,a)
- #define RGB565_GET_G(a) RGBX_GET_X(RGB565,G,a)
- #define RGB565_GET_B(a) RGBX_GET_X(RGB565,B,a)
- #define RGB565_SET(a,r,g,b) RGBX_SET( RGB565,a,r,g,b)
- #define RGB555_GET_R(a) RGBX_GET_X(RGB555,R,a)
- #define RGB555_GET_G(a) RGBX_GET_X(RGB555,G,a)
- #define RGB555_GET_B(a) RGBX_GET_X(RGB555,B,a)
- #define RGB555_SET(a,r,g,b) RGBX_SET( RGB555,a,r,g,b)
- #define RGB8_GET_R(a) PAL_GET_R(a##_idx)
- #define RGB8_GET_G(a) PAL_GET_G(a##_idx)
- #define RGB8_GET_B(a) PAL_GET_B(a##_idx)
- #define RGB8_SET(a,r,g,b) a##_idx=PMAP_GET(r,g,b)
- /*
- * Generic field extraction/assignment macros:
- */
- #define GET_R(f,a) f##_GET_R(a)
- #define GET_G(f,a) f##_GET_G(a)
- #define GET_B(f,a) f##_GET_B(a)
- #define SET(f,a,r,g,b) f##_SET(a,r,g,b)
- /*
- * Generic pixel-format converter:
- * (sf/sa - source pixel format/name; df/da - dest. pixel format/name)
- */
- #define CONVERT(df,da,sf,sa) SET(df,da,GET_R(sf,sa),GET_G(sf,sa),GET_B(sf,sa))
- /*
- * Generic pixel load and convert macro:
- */
- #define LOAD_CONVERT(df,da,sf,s)
- /* do we have the same format? */
- if (ID(df) == ID(sf)) {
- /* just load pixel */
- LOAD(df,s,da);
- } else {
- /* load & convert pixel: */
- PIXEL(sf,sa);
- LOAD(sf,s,sa);
- CONVERT(df,da,sf,sa);
- }
- /*
- * Get the average value of two pixels:
- * (da=(sa+sb)/2)
- */
- #define RGBX_AVERAGE(f,da,sa,sb)
- da##_rgb = (((sa##_rgb^sb##_rgb)>>1)
- & (((1U<<(START(f,R)+BITS(f,R)-1))-(1U<<START(f,R)))
- |((1U<<(START(f,G)+BITS(f,G)-1))-(1U<<START(f,G)))
- |((1U<<(START(f,B)+BITS(f,B)-1))-(1U<<START(f,B)))))
- + (sa##_rgb&sb##_rgb)
- #define RGB32_AVERAGE(da,sa,sb) RGBX_AVERAGE(RGB32,da,sa,sb)
- #define BGR32_AVERAGE(da,sa,sb) RGBX_AVERAGE(BGR32,da,sa,sb)
- #define RGB24_AVERAGE(da,sa,sb)
- SET(RGB24,da,((GET_R(RGB24,sa)+GET_R(RGB24,sb))>>1),
- ((GET_G(RGB24,sa)+GET_G(RGB24,sb))>>1),
- ((GET_B(RGB24,sa)+GET_B(RGB24,sb))>>1))
- #define RGB565_AVERAGE(da,sa,sb) RGBX_AVERAGE(RGB565,da,sa,sb)
- #define RGB555_AVERAGE(da,sa,sb) RGBX_AVERAGE(RGB555,da,sa,sb)
- #define RGB8_AVERAGE(da,sa,sb)
- SET(RGB8,da,((GET_R(RGB8,sa)+GET_R(RGB8,sb))>>1),
- ((GET_G(RGB8,sa)+GET_G(RGB8,sb))>>1),
- ((GET_B(RGB8,sa)+GET_B(RGB8,sb))>>1))
- /*
- * Generic two pixels' average:
- */
- #define AVERAGE(f,da,sa,sb) f##_AVERAGE(da,sa,sb)
- /*
- * Loads a pixel and averages it with another one:
- * (da = (sa+[s])/2)
- */
- #define LOAD_AVERAGE(f,da,sa,s)
- {
- /* load & convert pixel: */
- PIXEL(f,sb);
- LOAD(f,s,sb);
- AVERAGE(f,da,sa,sb);
- }
- #ifdef __cplusplus
- }
- #endif
- #endif /* __RGB_H__ */