From: oetiker <oetiker@a5681a0c-68f1-0310-ab6d-d61299d08faa>
Date: Tue, 5 Apr 2005 20:17:45 +0000 (+0000)
Subject: * fix transparency rendering by rewinding the paths propperly
X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=99b9b7fd0cad0edea57c08fdf939d368c4c0ec45;p=rrdtool.git

* fix transparency rendering by rewinding the paths propperly
* fix x-axis label drawing by considering label precision



git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@359 a5681a0c-68f1-0310-ab6d-d61299d08faa
---

diff --git a/src/rrd_gfx.c b/src/rrd_gfx.c
index 2183827..0a44344 100644
--- a/src/rrd_gfx.c
+++ b/src/rrd_gfx.c
@@ -211,10 +211,6 @@ gfx_node_t   *gfx_new_text   (gfx_canvas_t *canvas,
 			      enum gfx_v_align_en v_align,
                               char* text){
    gfx_node_t *node = gfx_new_node(canvas,GFX_TEXT);
-/*   if (angle != 0.0){*/
-       /* currently we only support 0 and 270 */
-/*       angle = 270.0;
-   }*/
    
    node->text = strdup(text);
    node->size = size;
@@ -384,7 +380,7 @@ gfx_string gfx_string_create(FT_Face face,const char *text,
   gfx_char      glyph;          /* current glyph in table */
   unsigned int  n;
   int           error;
-  int        gottab;    
+  int        gottab = 0;    
 
   ft_pen.x = 0;   /* start at (0,0) !! */
   ft_pen.y = 0;
@@ -521,25 +517,31 @@ int           gfx_render_png (gfx_canvas_t *canvas,
         switch (node->type) {
         case GFX_LINE:
         case GFX_AREA: {   
-            ArtVpath *vec;
+            ArtVpath *vec,*pvec;
             double dst[6];     
-            ArtSVP *svp;
+            ArtSVP *svp,*usvp,*rsvp;
             art_affine_scale(dst,canvas->zoom,canvas->zoom);
             vec = art_vpath_affine_transform(node->path,dst);
 	    if (node->closed_path)
 		gfx_libart_close_path(node, &vec);
 	    gfx_round_scaled_coordinates(vec);
+            pvec = art_vpath_perturb(vec);
+	    art_free(vec);
             if(node->type == GFX_LINE){
-                svp = art_svp_vpath_stroke ( vec, ART_PATH_STROKE_JOIN_ROUND,
+                svp = art_svp_vpath_stroke ( pvec, ART_PATH_STROKE_JOIN_ROUND,
                                              ART_PATH_STROKE_CAP_ROUND,
                                              node->size*canvas->zoom,1,1);
             } else {
-                svp = art_svp_from_vpath ( vec );
+                svp = art_svp_from_vpath ( pvec );
             }
-            art_free(vec);
-            art_rgb_svp_alpha (svp ,0,0, pys_width, pys_height,
-                               node->color, buffer, rowstride, NULL);
+            art_free(pvec);
+            usvp=art_svp_uncross(svp);
             art_free(svp);
+	    rsvp=art_svp_rewind_uncrossed(usvp,ART_WIND_RULE_ODDEVEN); 
+            art_free(usvp); 
+            art_rgb_svp_alpha (rsvp ,0,0, pys_width, pys_height,
+                               node->color, buffer, rowstride, NULL);
+            art_free(rsvp);
             break;
         }
         case GFX_TEXT: {
diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 22f3f54..0279d49 100644
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -1805,15 +1805,15 @@ vertical_grid(
        
     }
     /* paint the labels below the graph */
-    for(ti = find_first_time(im->start,
+    for(ti = find_first_time(im->start - im->xlab_user.precis/2,
 			    im->xlab_user.labtm,
 			    im->xlab_user.labst);
-	ti <= im->end; 
+	ti <= im->end - im->xlab_user.precis/2; 
 	ti = find_next_time(ti,im->xlab_user.labtm,im->xlab_user.labst)
 	){
         tilab= ti + im->xlab_user.precis/2; /* correct time for the label */
 	/* are we inside the graph ? */
-	if (ti < im->start || ti > im->end) continue;
+	if (tilab < im->start || tilab > im->end) continue;
 
 #if HAVE_STRFTIME
 	localtime_r(&tilab, &tm);
@@ -1962,6 +1962,14 @@ grid_paint(image_desc_t   *im)
                                                       im->tabwidth,"M", 0)*1.2;
                             boxV = boxH;
                             
+                            /* make sure transparent colors show up all the same */
+			    node = gfx_new_area(im->canvas,
+                                                X0,Y0-boxV,
+                                                X0,Y0,
+                                                X0+boxH,Y0,
+                                                im->graph_col[GRC_CANVAS]);
+                            gfx_add_point ( node, X0+boxH, Y0-boxV );
+
                             node = gfx_new_area(im->canvas,
                                                 X0,Y0-boxV,
                                                 X0,Y0,
@@ -1970,7 +1978,7 @@ grid_paint(image_desc_t   *im)
                             gfx_add_point ( node, X0+boxH, Y0-boxV );
                             node = gfx_new_line(im->canvas,
                                                 X0,Y0-boxV, X0,Y0,
-                                                1,0x000000FF);
+                                                1,im->graph_col[GRC_FONT]);
                             gfx_add_point(node,X0+boxH,Y0);
                             gfx_add_point(node,X0+boxH,Y0-boxV);
                             gfx_close_path(node);