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Diffstat (limited to 'src/glut/fbdev/colormap.c')
| -rw-r--r-- | src/glut/fbdev/colormap.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/src/glut/fbdev/colormap.c b/src/glut/fbdev/colormap.c deleted file mode 100644 index 3e72a7b..0000000 --- a/src/glut/fbdev/colormap.c +++ /dev/null @@ -1,177 +0,0 @@ -/* - * Mesa 3-D graphics library - * Version: 6.5 - * Copyright (C) 1995-2006 Brian Paul - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library 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 - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/* - * Library for glut using mesa fbdev driver - * - * Written by Sean D'Epagnier (c) 2006 - */ - -#include <stdio.h> -#include <stdlib.h> - -#include <linux/fb.h> - -#include <GL/gl.h> -#include <GL/glut.h> - -#include "internal.h" - -#define TOCMAP(x)(unsigned short)((x<0?0:x>1?1:x)*(GLfloat) ((1<<16) - 1)) -#define TORMAP(x)(unsigned short)((x<0?0:x>1?1:x)*(GLfloat)(REVERSECMAPSIZE-1)) -#define FROMCMAP(x) (GLfloat)x / (GLfloat)((1<<16) - 1) - -static struct fb_cmap ColorMap, OriginalColorMap; - -unsigned short RedColorMap[256], GreenColorMap[256], BlueColorMap[256]; - -unsigned char ReverseColorMap[REVERSECMAPSIZE] - [REVERSECMAPSIZE] - [REVERSECMAPSIZE]; - -static void FindReverseMap(int r, int g, int b) -{ - static int count; - int i, shift = 16 - REVERSECMAPSIZELOG; - unsigned int minv = -1, mini = 0; - for(i=0; i<256; i++) { - int val = 0; - val += abs(r-(RedColorMap[i]>>shift)); - val += abs(g-(GreenColorMap[i]>>shift)); - val += abs(b-(BlueColorMap[i]>>shift)); - if(val < minv) { - minv = val; - mini = i; - } - } - ReverseColorMap[r][g][b] = mini; -} - -static void FillItemReverseColorMap(int r, int g, int b) -{ - FindReverseMap(r, g, b); - if(r > 0) - FindReverseMap(r-1, g, b); - if(r < REVERSECMAPSIZE - 1) - FindReverseMap(r+1, g, b); - if(g > 0) - FindReverseMap(r, g-1, b); - if(g < REVERSECMAPSIZE - 1) - FindReverseMap(r, g+1, b); - if(b > 0) - FindReverseMap(r, g, b-1); - if(b < REVERSECMAPSIZE - 1) - FindReverseMap(r, g, b+1); -} - -static void FillReverseColorMap(void) -{ - int r, g, b; - for(r = 0; r < REVERSECMAPSIZE; r++) - for(g = 0; g < REVERSECMAPSIZE; g++) - for(b = 0; b < REVERSECMAPSIZE; b++) - FindReverseMap(r, g, b); -} - -void RestoreColorMap(void) -{ - if(FixedInfo.visual == FB_VISUAL_TRUECOLOR) - return; - - if (ioctl(FrameBufferFD, FBIOPUTCMAP, (void *) &ColorMap) < 0) - sprintf(exiterror, "ioctl(FBIOPUTCMAP) failed!\n"); -} - -void LoadColorMap(void) -{ - if(FixedInfo.visual == FB_VISUAL_TRUECOLOR) - return; - - ColorMap.start = 0; - ColorMap.red = RedColorMap; - ColorMap.green = GreenColorMap; - ColorMap.blue = BlueColorMap; - ColorMap.transp = NULL; - - if(DisplayMode & GLUT_INDEX) { - ColorMap.len = 256; - - if (ioctl(FrameBufferFD, FBIOGETCMAP, (void *) &ColorMap) < 0) - sprintf(exiterror, "ioctl(FBIOGETCMAP) failed!\n"); - - FillReverseColorMap(); - } else { - int rcols = 1 << VarInfo.red.length; - int gcols = 1 << VarInfo.green.length; - int bcols = 1 << VarInfo.blue.length; - - int i; - - ColorMap.len = gcols; - - for (i = 0; i < rcols ; i++) - RedColorMap[i] = (65536/(rcols-1)) * i; - - for (i = 0; i < gcols ; i++) - GreenColorMap[i] = (65536/(gcols-1)) * i; - - for (i = 0; i < bcols ; i++) - BlueColorMap[i] = (65536/(bcols-1)) * i; - - RestoreColorMap(); - } -} - -void glutSetColor(int cell, GLfloat red, GLfloat green, GLfloat blue) -{ - if(cell < 0 || cell >= 256) - return; - - RedColorMap[cell] = TOCMAP(red); - GreenColorMap[cell] = TOCMAP(green); - BlueColorMap[cell] = TOCMAP(blue); - - RestoreColorMap(); - - FillItemReverseColorMap(TORMAP(red), TORMAP(green), TORMAP(blue)); -} - -GLfloat glutGetColor(int cell, int component) -{ - if(!(DisplayMode & GLUT_INDEX)) - return -1.0; - - if(cell < 0 || cell > 256) - return -1.0; - - switch(component) { - case GLUT_RED: - return FROMCMAP(RedColorMap[cell]); - case GLUT_GREEN: - return FROMCMAP(GreenColorMap[cell]); - case GLUT_BLUE: - return FROMCMAP(BlueColorMap[cell]); - } - return -1.0; -} - -void glutCopyColormap(int win) -{ -} |