From 73f90db03816d4e70e4fff5cc630668f44be1af3 Mon Sep 17 00:00:00 2001
From: lecoanet
Date: Fri, 26 Jan 2007 09:28:39 +0000
Subject: Added experimental code for filling maps (do not support arcs).
 Contributed by Intuilab.

---
 generic/Map.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 68 insertions(+), 7 deletions(-)

(limited to 'generic/Map.c')

diff --git a/generic/Map.c b/generic/Map.c
index 0ceb966..fd61709 100644
--- a/generic/Map.c
+++ b/generic/Map.c
@@ -1309,6 +1309,28 @@ Draw(ZnItem     item)
  */
 #ifdef GL
 static void
+MapRenderVectors(ZnTriStrip *tristrip)
+{
+  unsigned int  i, j, num_points;
+  ZnPoint       *points;
+
+  for (i = 0; i < tristrip->num_strips; i++) {
+    num_points = tristrip->strips[i].num_points;
+    points = tristrip->strips[i].points;
+    if (tristrip->strips[i].fan) {
+      glBegin(GL_TRIANGLE_FAN);
+    }
+    else {
+      glBegin(GL_TRIANGLE_STRIP);
+    }
+    for (j = 0; j < num_points; j++, points++) {
+      glVertex2d(points->x, points->y);
+    }
+    glEnd();
+  }
+}
+
+static void
 Render(ZnItem   item)
 {
   ZnWInfo       *wi = item->wi;
@@ -1333,15 +1355,54 @@ Render(ZnItem   item)
   alpha = ZnComposeAlpha(alpha, wi->alpha);
   glColor4us(color->red, color->green, color->blue, alpha);
   if (map->filled) {
-    if (ZnListSize(map->vectors) || ZnListSize(map->arcs)) {
-        /* TODO_GL: Need to have a tesselated polygon then
-         * fill it either using ZnRenderTile or solid.
-         */
-      if (map->fill_pattern != ZnUnspecifiedImage) {
-        /* Fill stippled */
+    //
+    // TODO: This code doesn't handle pattern/tile and filled
+    // arcs are not supported. The tesselation data is not
+    // cached for future reuse, it is redone for each render
+    // pass.
+    // Render only vectors
+    if (ZnListSize(map->vectors)) {
+      ZnTriStrip tristrip;
+      GLdouble v[3];
+      ZnCombineData *cdata, *cnext;
+
+      line_width = 1.0;
+      glLineWidth(line_width);
+      ZnSetLineStyle(wi, ZN_LINE_SIMPLE);
+      cnt = ZnListSize(map->vectors);
+      points = ZnListArray(map->vectors);      
+
+      /* Init our TriStrip */
+      tristrip.num_strips = 0;
+      tristrip.strips = NULL;
+
+      /* Start tessellation */
+      gluTessProperty(ZnTesselator.tess, GLU_TESS_BOUNDARY_ONLY, (GLdouble) GL_FALSE);
+      gluTessBeginPolygon(ZnTesselator.tess, &tristrip);
+      gluTessBeginContour(ZnTesselator.tess);
+
+      for (i =0; i < cnt; i += 2) {
+        v[0] = points[i].x;
+        v[1] = points[i].y;
+        v[2] = 0;
+        gluTessVertex(ZnTesselator.tess, v, &points[i]);
       }
-      else {
+	
+      gluTessEndContour(ZnTesselator.tess);
+      gluTessEndPolygon(ZnTesselator.tess);
+	
+      cdata = ZnTesselator.combine_list;
+      while (cdata) {
+        ZnTesselator.combine_length--;
+        cnext = cdata->next;
+        ZnFree(cdata);
+        cdata = cnext;
       }
+      ZnTesselator.combine_list = NULL;
+        
+      /* Render our vectors*/
+      MapRenderVectors(&tristrip);
+      ZnTriFree(&tristrip);
     }
   }
   else { /* Not filled */
-- 
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