diff options
Diffstat (limited to 'dvi/mdvi-lib/color.c')
-rw-r--r-- | dvi/mdvi-lib/color.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/dvi/mdvi-lib/color.c b/dvi/mdvi-lib/color.c deleted file mode 100644 index 366b0ea..0000000 --- a/dvi/mdvi-lib/color.c +++ /dev/null @@ -1,135 +0,0 @@ -/* - * Copyright (C) 2000, Matias Atria - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include "mdvi.h" -#include "color.h" - -void mdvi_set_color(DviContext *dvi, Ulong fg, Ulong bg) -{ - if(dvi->curr_fg != fg || dvi->curr_bg != bg) { - DEBUG((DBG_DEVICE, "setting color to (%lu,%lu)\n", fg, bg)); - if(dvi->device.set_color) - dvi->device.set_color(dvi->device.device_data, fg, bg); - dvi->curr_fg = fg; - dvi->curr_bg = bg; - } -} - -void mdvi_push_color(DviContext *dvi, Ulong fg, Ulong bg) -{ - if(dvi->color_top == dvi->color_size) { - dvi->color_size += 32; - dvi->color_stack = mdvi_realloc(dvi->color_stack, - dvi->color_size * sizeof(DviColorPair)); - } - dvi->color_stack[dvi->color_top].fg = dvi->curr_fg; - dvi->color_stack[dvi->color_top].bg = dvi->curr_bg; - dvi->color_top++; - mdvi_set_color(dvi, fg, bg); -} - -void mdvi_pop_color(DviContext *dvi) -{ - Ulong fg, bg; - - if(dvi->color_top == 0) - return; - dvi->color_top--; - fg = dvi->color_stack[dvi->color_top].fg; - bg = dvi->color_stack[dvi->color_top].bg; - mdvi_set_color(dvi, fg, bg); -} - -void mdvi_reset_color(DviContext *dvi) -{ - dvi->color_top = 0; - mdvi_set_color(dvi, dvi->params.fg, dvi->params.bg); -} - -/* cache for color tables, to avoid creating them for every glyph */ -typedef struct { - Ulong fg; - Ulong bg; - Uint nlevels; - Ulong *pixels; - int density; - double gamma; - Uint hits; -} ColorCache; - -#define CCSIZE 256 -static ColorCache color_cache[CCSIZE]; -static int cc_entries; - -#define GAMMA_DIFF 0.005 - - -/* create a color table */ -Ulong *get_color_table(DviDevice *dev, - int nlevels, Ulong fg, Ulong bg, double gamma, int density) -{ - ColorCache *cc, *tofree; - int lohits; - Ulong *pixels; - int status; - - lohits = color_cache[0].hits; - tofree = &color_cache[0]; - /* look in the cache and see if we have one that matches this request */ - for(cc = &color_cache[0]; cc < &color_cache[cc_entries]; cc++) { - if(cc->hits < lohits) { - lohits = cc->hits; - tofree = cc; - } - if(cc->fg == fg && cc->bg == bg && cc->density == density && - cc->nlevels == nlevels && fabs(cc->gamma - gamma) <= GAMMA_DIFF) - break; - } - - if(cc < &color_cache[cc_entries]) { - cc->hits++; - return cc->pixels; - } - - DEBUG((DBG_DEVICE, "Adding color table to cache (fg=%lu, bg=%lu, n=%d)\n", - fg, bg, nlevels)); - - /* no entry was found in the cache, create a new one */ - if(cc_entries < CCSIZE) { - cc = &color_cache[cc_entries++]; - cc->pixels = NULL; - } else { - cc = tofree; - mdvi_free(cc->pixels); - } - pixels = xnalloc(Ulong, nlevels); - status = dev->alloc_colors(dev->device_data, - pixels, nlevels, fg, bg, gamma, density); - if(status < 0) { - mdvi_free(pixels); - return NULL; - } - cc->fg = fg; - cc->bg = bg; - cc->gamma = gamma; - cc->density = density; - cc->nlevels = nlevels; - cc->pixels = pixels; - cc->hits = 1; - return pixels; -} |