From: ellson <devnull@localhost>
Date: Thu, 1 Nov 2007 21:01:07 +0000 (+0000)
Subject: add support for imagescale attribute   ( imagescale=[no|yes|width|height|both] )
X-Git-Tag: LAST_LIBGRAPH~32^2~5101
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=506383f70ea74d8b079d49356b19c3e5f5e5adcd;p=graphviz

add support for imagescale attribute   ( imagescale=[no|yes|width|height|both] )
---

diff --git a/lib/common/globals.h b/lib/common/globals.h
index bac10fcac..bec2def3b 100644
--- a/lib/common/globals.h
+++ b/lib/common/globals.h
@@ -102,7 +102,7 @@ extern "C" {
 	*N_fontsize, *N_fontname, *N_fontcolor,
 	*N_label, *N_nojustify, *N_style, *N_showboxes,
 	*N_sides, *N_peripheries, *N_orientation,
-	*N_skew, *N_distortion, *N_fixed, *N_layer,
+	*N_skew, *N_distortion, *N_fixed, *N_imagescale, *N_layer,
 	*N_group, *N_comment, *N_vertices, *N_z;
     EXTERN attrsym_t
 	*E_weight, *E_minlen, *E_color,
diff --git a/lib/common/htmltable.c b/lib/common/htmltable.c
index eb5330269..ae7ba7ef7 100644
--- a/lib/common/htmltable.c
+++ b/lib/common/htmltable.c
@@ -411,7 +411,7 @@ emit_html_img(GVJ_t * job, htmlimg_t * cp, htmlenv_t * env)
     A[3].x = A[0].x;
     A[3].y = A[2].y;
 
-    gvrender_usershape(job, cp->src, A, 4, TRUE, 0);
+    gvrender_usershape(job, cp->src, A, 4, TRUE, "");
 }
 
 static void
diff --git a/lib/common/input.c b/lib/common/input.c
index 1fb1562bb..7919297d7 100644
--- a/lib/common/input.c
+++ b/lib/common/input.c
@@ -669,6 +669,7 @@ void graph_init(graph_t * g, boolean use_rankdir)
     N_orientation = agfindattr(g->proto->n, "orientation");
     N_distortion = agfindattr(g->proto->n, "distortion");
     N_fixed = agfindattr(g->proto->n, "fixedsize");
+    N_imagescale = agfindattr(g->proto->n, "imagescale");
     N_nojustify = agfindattr(g->proto->n, "nojustify");
     N_layer = agfindattr(g->proto->n, "layer");
     N_group = agfindattr(g->proto->n, "group");
diff --git a/lib/common/shapes.c b/lib/common/shapes.c
index 218e5d74c..8372488c7 100644
--- a/lib/common/shapes.c
+++ b/lib/common/shapes.c
@@ -1474,7 +1474,7 @@ static void poly_gencode(GVJ_t * job, node_t * n)
 		gvrender_polygon(job, AF, sides, filled);
 	    }
 	}
-	gvrender_usershape(job, name, AF, sides, filled, mapbool(late_string(n, N_fixed, "false")));
+	gvrender_usershape(job, name, AF, sides, filled, late_string(n, N_imagescale, "false"));
 	filled = FALSE;  /* with user shapes, we have done the fill if needed */
     }
 
diff --git a/lib/common/usershape.h b/lib/common/usershape.h
index 3c6455476..3ce3e71df 100644
--- a/lib/common/usershape.h
+++ b/lib/common/usershape.h
@@ -28,6 +28,14 @@ extern "C" {
 		FT_PDF, FT_PS, FT_EPS
     } imagetype_t;
 
+    typedef enum {
+	IMAGESCALE_NO,     /* no image scaling */
+	IMAGESCALE_YES,    /* scale image to fit but keep aspect ratio */
+	IMAGESCALE_WIDTH,  /* scale image width to fit, keep height fixed */
+	IMAGESCALE_HEIGHT, /* scale image height to fit, keep width fixed */
+	IMAGESCALE_BOTH    /* scale image to fit without regard for aspect ratio */
+    } imagescale_t;
+
     typedef struct usershape_s usershape_t;
 
     struct usershape_s {
diff --git a/lib/gvc/gvcproc.h b/lib/gvc/gvcproc.h
index 37bac1e38..87690b559 100644
--- a/lib/gvc/gvcproc.h
+++ b/lib/gvc/gvcproc.h
@@ -121,7 +121,7 @@ extern "C" {
 			int arrow_at_start, int arrow_at_end, boolean filled);
     extern void gvrender_polyline(GVJ_t * job, pointf * AF, int n);
     extern void gvrender_comment(GVJ_t * job, char *str);
-    extern void gvrender_usershape(GVJ_t * job, char *name, pointf * AF, int n, boolean filled, boolean expand);
+    extern void gvrender_usershape(GVJ_t * job, char *name, pointf * AF, int n, boolean filled, char *imagescale);
 
 /* layout */
 
diff --git a/lib/gvc/gvrender.c b/lib/gvc/gvrender.c
index a219af027..30c6bca1a 100644
--- a/lib/gvc/gvrender.c
+++ b/lib/gvc/gvrender.c
@@ -38,6 +38,7 @@
 
 extern int emit_once(char *str);
 extern shape_desc *find_user_shape(char *name);
+extern boolean mapbool(char *s);
 
 /* storage for temporary hacks until client API is FP */
 static pointf *AF;
@@ -929,12 +930,21 @@ void gvrender_comment(GVJ_t * job, char *str)
 #endif
 }
 
+static imagescale_t get_imagescale(char *s)
+{
+        if (*s == '\0') return IMAGESCALE_YES;
+        if (!strcasecmp(s, "width")) return IMAGESCALE_WIDTH;
+        if (!strcasecmp(s, "height")) return IMAGESCALE_HEIGHT;
+        if (!strcasecmp(s, "both")) return IMAGESCALE_BOTH;
+        if (mapbool(s)) return IMAGESCALE_YES;
+        return IMAGESCALE_NO;
+}
+
 /* gvrender_usershape:
- * If expand is true, if necessary expand user image to fill polygon a,
- * maintaining aspect ratio.
+ * Scale image to fill polygon bounding box according to "imagescale"
  */
 void gvrender_usershape(GVJ_t * job, char *name, pointf * a, int n, 
-    boolean filled, boolean expand)
+    boolean filled, char *imagescale)
 {
     gvrender_engine_t *gvre = job->render.engine;
     usershape_t *us;
@@ -965,10 +975,13 @@ void gvrender_usershape(GVJ_t * job, char *name, pointf * a, int n,
     ph = b.UR.y - b.LL.y;
     ih = (double)isz.y;
     iw = (double)isz.x;
-    if (expand) {
-	scalex = pw / iw;
-	scaley = ph / ih;
-    /* keep aspect ratio fixed by just using the smaller scale */
+
+    scalex = pw / iw;
+    scaley = ph / ih;
+
+    switch (get_imagescale(imagescale)) {
+    case IMAGESCALE_YES:
+        /* keep aspect ratio fixed by just using the smaller scale */
 	if (scalex < scaley) {
 	    iw *= scalex;
 	    ih *= scalex;
@@ -976,6 +989,20 @@ void gvrender_usershape(GVJ_t * job, char *name, pointf * a, int n,
 	    iw *= scaley;
 	    ih *= scaley;
 	}
+	break;
+    case IMAGESCALE_WIDTH:
+	iw *= scalex;
+	break;
+    case IMAGESCALE_HEIGHT:
+	ih *= scaley;
+	break;
+    case IMAGESCALE_BOTH:
+	iw *= scalex;
+	ih *= scaley;
+	break;
+    case IMAGESCALE_NO:
+    default:
+	break;
     }
 
     /* if image is smaller than target area then center it */