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Viewing changes to backend/dvi/mdvi-lib/dviread.c

  • Committer: Bazaar Package Importer
  • Author(s): Frederic Peters
  • Date: 2011-04-14 16:20:57 UTC
  • mfrom: (1.6.4 upstream)
  • mto: (1.3.5 experimental)
  • mto: This revision was merged to the branch mainline in revision 138.
  • Revision ID: james.westby@ubuntu.com-20110414162057-0ofhbd139zs6ev6y
Import upstream version 3.0.0

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backend/dvi/mdvi-lib/dviread.c
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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 */
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#include <config.h>
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        (a), (b) > 0 ? '+' : '-', \
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        (b) > 0 ? (b) : -(b), (c)
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/*
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 * Draw rules with some sort of antialias support. Usefult for high-rate
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 * scale factors.
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 */ 
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static void draw_shrink_rule (DviContext *dvi, int x, int y, Uint w, Uint h, int f)
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{               
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        int hs, vs, npixels;
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        Ulong fg, bg;
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        Ulong *pixels;
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        hs = dvi->params.hshrink;
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        vs = dvi->params.vshrink;
 
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        fg = dvi->curr_fg;
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        bg = dvi->curr_bg;
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        if (MDVI_ENABLED(dvi, MDVI_PARAM_ANTIALIASED)) {
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                npixels = vs * hs + 1;
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                pixels = get_color_table(&dvi->device, npixels, bg, fg,
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                                         dvi->params.gamma, dvi->params.density);
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                if (pixels) {
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                    int color;
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                    /*  Lines with width 1 should be perfectly visible
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                     *  in shrink about 15. That is the reason of constant
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                     */
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                    color = (pow (vs / h * hs, 2) + pow (hs / w * vs, 2)) / 225;
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                    if (color < npixels) {
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                        fg = pixels[color];
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                    } else {    
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                        fg = pixels[npixels - 1];
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                    }
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                }
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        }
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        mdvi_push_color (dvi, fg, bg);
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        dvi->device.draw_rule(dvi, x, y, w, h, f);
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        mdvi_pop_color (dvi);
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        Int32   arg;
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        arg = dugetn(dvi, opcode - DVI_XXX1 + 1);
 
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        if (arg <= 0) {
 
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                dvierr(dvi, _("malformed special length\n"));
 
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                return -1;
 
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        }
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        s = mdvi_malloc(arg + 1);
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        dread(dvi, s, arg);
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        s[arg] = 0;