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Diffstat (limited to 'source/blender/imbuf/intern/ham.c')
| -rw-r--r-- | source/blender/imbuf/intern/ham.c | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/source/blender/imbuf/intern/ham.c b/source/blender/imbuf/intern/ham.c deleted file mode 100644 index 27f6d9c691a..00000000000 --- a/source/blender/imbuf/intern/ham.c +++ /dev/null @@ -1,276 +0,0 @@ -/** - * - * ***** BEGIN GPL LICENSE BLOCK ***** - * - * This program 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 program 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 program; if not, write to the Free Software Foundation, - * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV. - * All rights reserved. - * - * The Original Code is: all of this file. - * - * Contributor(s): none yet. - * - * ***** END GPL LICENSE BLOCK ***** - * ham.c - * - * $Id$ - */ - -#include "BLI_blenlib.h" - -#include "imbuf.h" -#include "imbuf_patch.h" -#include "IMB_imbuf_types.h" -#include "IMB_imbuf.h" -#include "IMB_cmap.h" -#include "IMB_hamx.h" -#include "IMB_ham.h" - -extern short alpha_col0; - -#define HAMB 0x0100 -#define HAMG 0x0400 -#define HAMR 0x0200 -#define HAMC 0x1000 -#define HAMFREE 0x2000 - -static void addhamdither(short x, unsigned char *dit, - short dmax, unsigned char *rgb, - unsigned short *ham, - short type, short round, short shift) -{ - short dx = 0; - short c1, c2; - - for (;x>0;x--){ - if (ham[0] & (HAMFREE | type)){ - c2 = c1 = *rgb; - - /* wrap dither */ - while (dx >= dmax) dx -= dmax; - - c1 += dit[dx]; - if (c1 > 255) c1 = 255; - c2 += round; - if (c2 > 255) c2 = 255; - - if (c1 != c2){ - c1 >>= shift; c2 >>= shift; - if (ham[1] & HAMFREE){ - ham[0] = type + c1; - ham[1] = type + c2; - } else if (ham[1] & type){ - ham[0] = type + c1; - } else if ((ham[2] & (type | HAMFREE)) == type){ - ham[0] = type + c1; - } else if ((ham[1] & HAMC) | (ham[2] & HAMC)){ - ham[0] = type + c1; - } - } - } - rgb += 4; - ham ++; - dx ++; - } -} - -static void convhamscanl(short x, short y, - unsigned char *rgbbase, - unsigned char *coltab, - short *deltab, - short bits) -{ - int a, r, g, b, lr, lg, lb, dr, dg, db, col, fout, type, x2; - int round, shift; - uchar *rgb, dit[2]; - unsigned short *ham, *hambase; - - /* Concept: - first we check the entire image, where color transitions are coded: FGRB XXXX XXXX - F - free color value, can be changed by anyone - G/R/B - green/red/blue ham transition, only to be changed by this color - XXXX XXXX - N bits value. - - 0000 XXXX XXXX is palette color. - - after that first the green dither is added, then the red dither, and finally blue dither - */ - - if ((hambase = (unsigned short *) malloc((x+4) * sizeof(unsigned short)))==0) return; - - lb = coltab[1]; - lg = coltab[2]; - lr = coltab[3]; - type = col = 0; - - ham = hambase; - rgb = rgbbase; - - shift = 8 - bits; - round = 1 << (shift - 1); - - /* to prevent 'noise' at the end of the line */ - for (x2 = 3; x2 >= 0; x2 --) hambase[x + x2] = HAMFREE; - - for (x2 = x ;x2 > 0; x2--){ - r = rgb[0] + round; - g = rgb[1] + round; - b = rgb[2] + round; - a = rgb[3]; - - if (a < 128 && alpha_col0) { - a = 1; - } else a = 0; - - if (b > 255) b = 255; - if (g > 255) { - g = 255; - } - if (r > 255) r = 255; - - r >>= shift; - g >>= shift; - b >>= shift; - - if ((b-lb) | (g-lg) | (r-lr) | a){ - if (a) { - col = 0; - type = HAMC; - } else { - col = ((b << (2 * bits)) + (g << bits) + r) << 1; - fout = deltab[col + 1]; - col = deltab[col]; - type = HAMC; - - dr = quadr[lr-r]; - dg = quadr[lg-g]; - db = quadr[lb-b]; - - if ((dr+dg) <= fout){ - fout = dr+dg; - col = b; - type = HAMB; - } - if ((dg+db) <= fout){ - fout = dg+db; - col = r; - type = HAMR; - } - if ((dr+db) <= fout){ - fout = dr+db; - col = g; - type = HAMG; - } - } - - switch(type){ - case HAMG: - lg = g; - break; - case HAMR: - lr = r; - break; - case HAMB: - lb = b; - break; - default: - lb = coltab[col*4 + 1]; - lg = coltab[col*4 + 2]; - lr = coltab[col*4 + 3]; - } - *ham = type + col; - } else *ham = HAMG + HAMFREE + g; - - rgb += 4; - ham ++; - } - - - if (y & 1){ - dit[0] = 0 << (shift - 2); - dit[1] = 3 << (shift - 2); - } else { - dit[0] = 2 << (shift - 2); - dit[1] = 1 << (shift - 2); - } - - addhamdither(x,dit,2,rgbbase+2,hambase,HAMG, round, shift); - - if ((y & 1)==0){ - dit[0] = 3 << (shift - 2); - dit[1] = 0 << (shift - 2); - } else { - dit[0] = 1 << (shift - 2); - dit[1] = 2 << (shift - 2); - } - - addhamdither(x,dit,2,rgbbase+3,hambase,HAMR, round, shift); - addhamdither(x,dit,2,rgbbase+1,hambase,HAMB, round, shift); - - - ham = hambase; - rgb = rgbbase; - rgb += 3; - - for (x2=x;x2>0;x2--){ - type = *(ham++); - if (type & HAMG) type |= HAMR | HAMB; - - *rgb = (type & 0xff) | ((type & (HAMR | HAMB)) >> shift); - rgb += 4; - } - - free (hambase); -} - - -short imb_converttoham(struct ImBuf *ibuf) -{ - unsigned int coltab[256],*rect; - short x,y,* deltab; - int mincol; - - memcpy(coltab,ibuf->cmap,4 * ibuf->maxcol); - - mincol = ibuf->mincol; - if (alpha_col0 && mincol == 0) mincol = 1; - - if (ibuf->ftype == AN_hamx) { - deltab = imb_coldeltatab((uchar *) coltab, 0, ibuf->maxcol, 4); - } else { - ibuf->cbits = ibuf->depth - 2; - imb_losecmapbits(ibuf, coltab); - deltab = imb_coldeltatab((uchar *) coltab, mincol, ibuf->maxcol, ibuf->cbits); - } - - rect = ibuf->rect; - x=ibuf->x; - y=ibuf->y; - - if (ibuf->ftype == AN_hamx){ - IMB_dit2(ibuf, 2, 4); - IMB_dit2(ibuf, 1, 4); - IMB_dit2(ibuf, 0, 4); - imb_convhamx(ibuf, (uchar *)coltab, deltab); - } else { - for(;y > 0; y--){ - convhamscanl(x, y, (uchar *)rect, (uchar *)coltab, deltab, ibuf->cbits); - rect += x; - } - } - - return (TRUE); -} |