gegl r1990 - trunk/docs

[ok svn gnome org]

Author: ok
Date: Sat Feb  9 23:24:50 2008
New Revision: 1990
URL: http://svn.gnome.org/viewvc/gegl?rev=1990&view=rev

Log:
* Makefile.am: added rule to build hello-world-video
* hello-world-video.c: (main): added.
* hello-world.c: (main): modified to use fractal-explorer instead of
FractalExplorer.


Added:
   trunk/docs/hello-world-video.c
Modified:
   trunk/docs/ChangeLog
   trunk/docs/Makefile.am
   trunk/docs/hello-world.c

Modified: trunk/docs/Makefile.am
==============================================================================
--- trunk/docs/Makefile.am	(original)
+++ trunk/docs/Makefile.am	Sat Feb  9 23:24:50 2008
@@ -18,6 +18,7 @@
 	gegl.devhelp		\
 	devhelp.css		\
 	hello-world.c		\
+	hello-world-video.c	\
 	index-static.html.in	\
 	api.html		\
 	index.html
@@ -81,3 +82,6 @@
 
 hello-world: hello-world.c
 	$(CC) $< -o $@ `pkg-config --cflags --libs gegl`
+
+hello-world-video: hello-world-video.c
+	$(CC) $< -o $@ `pkg-config --cflags --libs gegl`

Added: trunk/docs/hello-world-video.c
==============================================================================
--- (empty file)
+++ trunk/docs/hello-world-video.c	Sat Feb  9 23:24:50 2008
@@ -0,0 +1,109 @@
+#include <gegl.h>
+
+gint
+main (gint    argc,
+      gchar **argv)
+{
+  gegl_init (&argc, &argv);  /* initialize the GEGL library */
+
+  {
+    /* instantiate a graph */
+    GeglNode *gegl = gegl_node_new ();
+
+/*
+This is the graph we're going to construct:
+ 
+.-----------.
+| ff-save   |
+`-----------'
+   |
+.-------.
+| layer |
+`-------'
+   |   \
+   |    \
+   |     \
+   |      |
+   |   .------.
+   |   | text |
+   |   `------'
+.------------------.
+| fractal-explorer |
+`------------------'
+
+*/
+
+    /*< The image nodes representing operations we want to perform */
+    GeglNode *display    = gegl_node_new_child (gegl,
+                                 "operation","ff-save",
+                                 "path", "fractal-zoom.avi",
+                                 "bitrate", 1200000.0,
+                                 NULL);
+    GeglNode *layer      = gegl_node_new_child (gegl,
+                                 "operation", "layer",
+                                 "x", 2.0,
+                                 "y", 4.0,
+                                 NULL);
+    GeglNode *text       = gegl_node_new_child (gegl,
+                                 "operation", "text",
+                                 "size", 10.0,
+                                 "color", gegl_color_new ("rgb(1.0,1.0,1.0)"),
+                                 NULL);
+    GeglNode *mandelbrot = gegl_node_new_child (gegl,
+                                "operation", "fractal-explorer",
+                                "width", 640,
+                                "height", 480,
+                                NULL);
+
+    gegl_node_link_many (mandelbrot, layer, display, NULL);
+    gegl_node_connect_to (text, "output",  layer, "aux");
+   
+    /* request that the save node is processed, all dependencies will
+     * be processed as well
+     */
+    {
+      gint frame;
+      gint frames = 100;
+
+      for (frame=0; frame<frames; frame++)
+        {
+          gchar string[512];
+          gdouble t = frame * 1.0/frames;
+          gdouble cx = -1.76;
+          gdouble cy = 0.0;
+
+#define INTERPOLATE(min,max) ((max)*(t)+(min)*(1.0-t))
+
+          gdouble xmin = INTERPOLATE(  cx-0.02, cx-2.5);
+          gdouble ymin = INTERPOLATE(  cy-0.02, cy-2.5);
+          gdouble xmax = INTERPOLATE(  cx+0.02, cx+2.5);
+          gdouble ymax = INTERPOLATE(  cy+0.02, cy+2.5);
+
+          if (xmin<-3.0)
+            xmin=-3.0;
+          if (ymin<-3.0)
+            ymin=-3.0;
+
+          gegl_node_set (mandelbrot, "xmin", xmin,
+                                     "ymin", ymin,
+                                     "xmax", xmax,
+                                     "ymax", ymax,
+                                     NULL);
+          g_sprintf (string, "%1.3f,%1.3f %1.3fÃ%1.3f",
+            xmin, ymin, xmax-xmin, ymax-ymin);
+          gegl_node_set (text, "string", string, NULL);
+          gegl_node_process (display);
+          g_print ("%3.0f%%  \r", t * 100);
+        }
+    }
+    g_print ("      \r");
+
+    /* free resources used by the graph and the nodes it owns */
+    g_object_unref (gegl);
+  }
+
+  /* free resources globally used by GEGL */
+  gegl_exit ();
+
+  return 0;
+}

Modified: trunk/docs/hello-world.c
==============================================================================
--- trunk/docs/hello-world.c	(original)
+++ trunk/docs/hello-world.c	Sat Feb  9 23:24:50 2008
@@ -27,9 +27,9 @@
    |   .------.
    |   | text |
    |   `------'
-.-----------------.
-| FractalExplorer |
-`-----------------'
+.------------------.
+| fractal-explorer |
+`------------------'
 
 */
 
@@ -46,9 +46,9 @@
                                  "color", gegl_color_new ("rgb(1.0,1.0,1.0)"),
                                  NULL);
     GeglNode *mandelbrot = gegl_node_new_child (gegl,
-                                "operation", "FractalExplorer",
-                                "width", 256,
-                                "height", 256,
+                                "operation", "fractal-explorer",
+                                "width", 512,
+                                "height", 384,
                                 NULL);
 
     gegl_node_link_many (mandelbrot, layer, display, NULL);
@@ -59,7 +59,7 @@
      */
     {
       gint frame;
-      gint frames = 30;
+      gint frames = 200;
 
       for (frame=0; frame<frames; frame++)
         {