From 47e0af9d913947e54d35b9bcade9a395749abd62 Mon Sep 17 00:00:00 2001
From: lecoanet
Date: Tue, 22 Jan 2002 10:36:06 +0000
Subject: Ajout de la fonction RenderPolyline pour centraliser le dessin des
 lignes.

---
 generic/Draw.c | 146 +++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 142 insertions(+), 4 deletions(-)

(limited to 'generic')

diff --git a/generic/Draw.c b/generic/Draw.c
index 555888a..95a6013 100644
--- a/generic/Draw.c
+++ b/generic/Draw.c
@@ -115,9 +115,9 @@ SetLineStyle(WidgetInfo	*wi,
     case LINE_DOTTED :
       XSetDashes(wi->dpy, wi->gc, 0, dotted, 2);
       break;
-  default:
-    values.line_style = LineSolid;
-    break;
+    default:
+      values.line_style = LineSolid;
+      break;
     }
     XChangeGC(wi->dpy, wi->gc, GCLineStyle, &values);
   }
@@ -942,6 +942,143 @@ RenderPolygonRelief(WidgetInfo	*wi,
 }
 
 void
+RenderPolyline(WidgetInfo	*wi,
+	       ZnPoint		*points,
+	       int		num_points,
+	       int		line_width,
+	       ZnBool		closed,
+	       LineStyle	line_style,
+	       int		cap_style,
+	       int		join_style,
+	       ZnLineEnd	first_end,
+	       ZnLineEnd	last_end,
+	       XColor		*color,
+	       int		alpha)
+{
+  int		num_clips = ZnListSize(wi->clip_stack);
+  ZnPoint	end_points[LINE_END_POINTS];
+  ZnBool	need_rcaps, thin;
+  int		pass, i, k, m;
+  ZnPoint	c1, c2;    
+  
+  /*
+   * The code below draws curves thiner than the min
+   * of GL_ALIASED_LINE_WIDTH_RANGE and GL_ALIASED_POINT_SIZE_RANGE
+   * with a mix of anti-aliased lines and points. The curves that
+   * are thicker are drawn using regular polygons.
+   * The joints are drawn only rounded, the caps can be either round
+   * or butt (but not projecting).
+   */
+  thin = ((line_width <= wi->max_line_width) &&
+	  (line_width <= wi->max_point_width));
+  glColor4us(color->red, color->green, color->blue, alpha);
+  SetLineStyle(wi, line_style);
+  glLineWidth(line_width);
+  glPointSize(line_width);
+
+  for (pass = 0; pass < 2; pass++) {
+    if (pass == 0) {
+      glStencilFunc(GL_EQUAL, num_clips, 0xFF);
+      glStencilOp(GL_KEEP, GL_INCR, GL_INCR);
+      if (num_clips == 0) {
+	glEnable(GL_STENCIL_TEST);
+      }
+    }
+    else {
+      glStencilFunc(GL_EQUAL, num_clips+1, 0xFF);
+      glStencilOp(GL_KEEP, GL_DECR, GL_DECR);
+      glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+    }
+    if (first_end) {
+      GetLineEnd(&points[0], &points[1], line_width, cap_style,
+		 first_end, end_points);
+      glBegin(GL_TRIANGLE_FAN);
+      for (m = 0; m < LINE_END_POINTS; m++) {
+	glVertex2f(end_points[m].x, end_points[m].y);
+      }
+      glEnd();
+    }
+    if (last_end) {
+      GetLineEnd(&points[num_points-1], &points[num_points-2],
+		 line_width, cap_style, last_end, end_points);
+      glBegin(GL_TRIANGLE_FAN);
+      for (m = 0; m < LINE_END_POINTS; m++) {
+	glVertex2f(end_points[m].x, end_points[m].y);
+      }
+      glEnd();
+    }
+    if (thin) {
+      glBegin(GL_LINE_STRIP);
+      for (i = 0; i < num_points; i++) {
+	glVertex2f(points[i].x, points[i].y);
+      }
+      glEnd();
+    }
+    else {
+      glBegin(GL_QUADS);
+      for (i = 0; i < num_points-1; i++) {
+	GetButtPoints(&points[i+1], &points[i], line_width, False, &c1, &c2);
+	glVertex2f(c1.x, c1.y);
+	glVertex2f(c2.x, c2.y);
+	GetButtPoints(&points[i], &points[i+1], line_width, False, &c1, &c2);
+	glVertex2f(c1.x, c1.y);
+	glVertex2f(c2.x, c2.y);
+      }
+      glEnd();
+    }
+
+    if (pass == 0) {
+      glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+    }
+    else {
+      glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+      glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+      glStencilFunc(GL_EQUAL, num_clips, 0xFF);
+      if (num_clips == 0) {
+	glDisable(GL_STENCIL_TEST);
+      }
+      return;
+    }
+    need_rcaps = ((line_width > 1) && (cap_style == CapRound) && !closed);
+    i = 0;
+    k = num_points;
+    if (closed) {
+      k--;
+    }
+    if (!need_rcaps || first_end) {
+      i++;
+    }
+    if (!need_rcaps || last_end) {
+      k--;
+    }
+    if (thin) {
+      glBegin(GL_POINTS);
+      for ( ; i < k; i++) {
+	glVertex2f(points[i].x, points[i].y);
+      }
+      glEnd();
+    }
+    else {
+      int	num_cpoints;
+      ZnReal	lw_2 = line_width / 2.0;
+      ZnPoint	*cpoints = GetCirclePoints(3, ZN_CIRCLE_COARSE,
+					   0, 360, &num_cpoints, NULL);
+      
+      for ( ; i < k; i++) {
+	glBegin(GL_TRIANGLE_FAN);
+	glVertex2f(points[i].x, points[i].y);
+	for (m = 0; m < num_cpoints; m++) {
+	  glVertex2f(points[i].x + cpoints[m].x*lw_2,
+		     points[i].y + cpoints[m].y*lw_2);
+	}
+	glEnd();
+      }
+    }
+  }
+}
+
+
+void
 RenderImage(struct _WidgetInfo	*wi,
 	    ImageBits		*image, /* ImageBits or BitmapBits */
 	    XColor		*color,
@@ -1179,6 +1316,7 @@ RenderGradient(struct _WidgetInfo	*wi,
   
   if (!cb && (type == ZN_AXIAL_GRADIENT)) { /* Render an aligned
 					     * axial gradient in the quad */
+    angle = gradient->g.angle;
     /*
      * Adjust the quad for 90 180 and 270 degrees axial
      * gradients. Other angles not supported.
@@ -1487,7 +1625,7 @@ getTCVI(TexFont	*txf,
     }
   }
   /*  ZnWarning("Tried to access unavailable texture font character");*/
-  printf("Tried to access unavailable texture font character '%c'(%d)\n", c, c);
+  printf("Tried to access unavailable texture font character '%c'(\\0%o)\n", c, c);
   return txf->lut[(int)'!' - txf->min_glyph];
 }
 
-- 
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