1 files changed, 154 insertions, 0 deletions
diff --git a/plug-ins/lighting/lighting-apply.c b/plug-ins/lighting/lighting-apply.c
new file mode 100644
index 0000000..500ed24
--- /dev/null
+++ b/plug-ins/lighting/lighting-apply.c
@@ -0,0 +1,154 @@
+/******************************************************/
+/* Apply mapping and shading on the whole input image */
+/******************************************************/
+
+#include "config.h"
+
+#include <sys/types.h>
+
+#include <libgimp/gimp.h>
+
+#include "lighting-main.h"
+#include "lighting-image.h"
+#include "lighting-shade.h"
+#include "lighting-apply.h"
+
+#include "libgimp/stdplugins-intl.h"
+
+
+/*************/
+/* Main loop */
+/*************/
+
+void
+compute_image (void)
+{
+  gint         xcount, ycount;
+  GimpRGB      color;
+  glong        progress_counter = 0;
+  GimpVector3  p;
+  gint32       new_image_id = -1;
+  gint32       new_layer_id = -1;
+  gint32       index;
+  guchar      *row = NULL;
+  guchar       obpp;
+  gboolean     has_alpha;
+  get_ray_func ray_func;
+
+  if (mapvals.create_new_image == TRUE ||
+      (mapvals.transparent_background == TRUE &&
+       ! gimp_drawable_has_alpha (input_drawable_id)))
+    {
+      /* Create a new image */
+      /* ================== */
+
+      new_image_id = gimp_image_new (width, height, GIMP_RGB);
+
+      if (mapvals.transparent_background == TRUE)
+        {
+          /* Add a layer with an alpha channel */
+          /* ================================= */
+
+          new_layer_id = gimp_layer_new (new_image_id, "Background",
+					 width, height,
+					 GIMP_RGBA_IMAGE,
+					 100.0,
+					 gimp_image_get_default_new_layer_mode (new_image_id));
+        }
+      else
+        {
+          /* Create a "normal" layer */
+          /* ======================= */
+
+          new_layer_id = gimp_layer_new (new_image_id, "Background",
+					 width, height,
+					 GIMP_RGB_IMAGE,
+					 100.0,
+					 gimp_image_get_default_new_layer_mode (new_image_id));
+        }
+
+      gimp_image_insert_layer (new_image_id, new_layer_id, -1, 0);
+      output_drawable_id = new_layer_id;
+    }
+
+  if (mapvals.bump_mapped == TRUE && mapvals.bumpmap_id != -1)
+    {
+      bumpmap_setup (mapvals.bumpmap_id);
+    }
+
+  precompute_init (width, height);
+
+  if (! mapvals.env_mapped || mapvals.envmap_id == -1)
+    {
+      ray_func = get_ray_color;
+    }
+  else
+    {
+      envmap_setup (mapvals.envmap_id);
+
+      ray_func = get_ray_color_ref;
+    }
+
+  dest_buffer = gimp_drawable_get_shadow_buffer (output_drawable_id);
+
+  has_alpha = gimp_drawable_has_alpha (output_drawable_id);
+
+  /* FIXME */
+  obpp = has_alpha ? 4 : 3; //gimp_drawable_bpp (output_drawable_id);
+
+  row = g_new (guchar, obpp * width);
+
+  gimp_progress_init (_("Lighting Effects"));
+
+  /* Init the first row */
+  if (mapvals.bump_mapped == TRUE && mapvals.bumpmap_id != -1 && height >= 2)
+    interpol_row (0, width, 0);
+
+  for (ycount = 0; ycount < height; ycount++)
+    {
+      if (mapvals.bump_mapped == TRUE && mapvals.bumpmap_id != -1)
+	precompute_normals (0, width, ycount);
+
+      index = 0;
+
+      for (xcount = 0; xcount < width; xcount++)
+	{
+	  p = int_to_pos (xcount, ycount);
+	  color = (* ray_func) (&p);
+
+	  row[index++] = (guchar) (color.r * 255.0);
+	  row[index++] = (guchar) (color.g * 255.0);
+	  row[index++] = (guchar) (color.b * 255.0);
+
+	  if (has_alpha)
+	    row[index++] = (guchar) (color.a * 255.0);
+
+	  progress_counter++;
+	}
+
+      gimp_progress_update ((gdouble) progress_counter /
+                            (gdouble) maxcounter);
+
+      gegl_buffer_set (dest_buffer, GEGL_RECTANGLE (0, ycount, width, 1), 0,
+                       has_alpha ?
+                       babl_format ("R'G'B'A u8") : babl_format ("R'G'B' u8"),
+                       row,
+                       GEGL_AUTO_ROWSTRIDE);
+    }
+
+  gimp_progress_update (1.0);
+
+  g_free (row);
+
+  g_object_unref (dest_buffer);
+
+  gimp_drawable_merge_shadow (output_drawable_id, TRUE);
+  gimp_drawable_update (output_drawable_id, 0, 0, width, height);
+
+  if (new_image_id!=-1)
+    {
+      gimp_display_new (new_image_id);
+      gimp_displays_flush ();
+    }
+
+}