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-rw-r--r--plug-ins/map-object/map-object-apply.c328
1 files changed, 328 insertions, 0 deletions
diff --git a/plug-ins/map-object/map-object-apply.c b/plug-ins/map-object/map-object-apply.c
new file mode 100644
index 0000000..0a2fb9b
--- /dev/null
+++ b/plug-ins/map-object/map-object-apply.c
@@ -0,0 +1,328 @@
+/******************************************************/
+/* Apply mapping and shading on the whole input image */
+/******************************************************/
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gtk/gtk.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "map-object-main.h"
+#include "map-object-image.h"
+#include "map-object-shade.h"
+#include "map-object-apply.h"
+
+#include "libgimp/stdplugins-intl.h"
+
+
+/*************/
+/* Main loop */
+/*************/
+
+gdouble imat[4][4];
+gfloat rotmat[16];
+static gfloat a[16], b[16];
+
+void
+init_compute (void)
+{
+ gint i;
+
+ switch (mapvals.maptype)
+ {
+ case MAP_SPHERE:
+
+ /* Rotate the equator/northpole axis */
+ /* ================================= */
+
+ gimp_vector3_set (&mapvals.firstaxis, 0.0, 0.0, -1.0);
+ gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
+
+ gimp_vector3_rotate (&mapvals.firstaxis,
+ gimp_deg_to_rad (mapvals.alpha),
+ gimp_deg_to_rad (mapvals.beta),
+ gimp_deg_to_rad (mapvals.gamma));
+ gimp_vector3_rotate (&mapvals.secondaxis,
+ gimp_deg_to_rad (mapvals.alpha),
+ gimp_deg_to_rad (mapvals.beta),
+ gimp_deg_to_rad (mapvals.gamma));
+
+ /* Compute the 2D bounding box of the sphere spanned by the axis */
+ /* ============================================================= */
+
+ compute_bounding_box ();
+
+ get_ray_color = get_ray_color_sphere;
+
+ break;
+
+ case MAP_PLANE:
+
+ /* Rotate the plane axis */
+ /* ===================== */
+
+ gimp_vector3_set (&mapvals.firstaxis, 1.0, 0.0, 0.0);
+ gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
+ gimp_vector3_set (&mapvals.normal, 0.0, 0.0, 1.0);
+
+ gimp_vector3_rotate (&mapvals.firstaxis,
+ gimp_deg_to_rad (mapvals.alpha),
+ gimp_deg_to_rad (mapvals.beta),
+ gimp_deg_to_rad (mapvals.gamma));
+ gimp_vector3_rotate (&mapvals.secondaxis,
+ gimp_deg_to_rad (mapvals.alpha),
+ gimp_deg_to_rad (mapvals.beta),
+ gimp_deg_to_rad (mapvals.gamma));
+
+ mapvals.normal = gimp_vector3_cross_product (&mapvals.firstaxis,
+ &mapvals.secondaxis);
+
+ if (mapvals.normal.z < 0.0)
+ gimp_vector3_mul (&mapvals.normal, -1.0);
+
+ /* Initialize intersection matrix */
+ /* ============================== */
+
+ imat[0][1] = -mapvals.firstaxis.x;
+ imat[1][1] = -mapvals.firstaxis.y;
+ imat[2][1] = -mapvals.firstaxis.z;
+
+ imat[0][2] = -mapvals.secondaxis.x;
+ imat[1][2] = -mapvals.secondaxis.y;
+ imat[2][2] = -mapvals.secondaxis.z;
+
+ imat[0][3] = mapvals.position.x - mapvals.viewpoint.x;
+ imat[1][3] = mapvals.position.y - mapvals.viewpoint.y;
+ imat[2][3] = mapvals.position.z - mapvals.viewpoint.z;
+
+ get_ray_color = get_ray_color_plane;
+
+ break;
+
+ case MAP_BOX:
+ get_ray_color = get_ray_color_box;
+
+ gimp_vector3_set (&mapvals.firstaxis, 1.0, 0.0, 0.0);
+ gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
+ gimp_vector3_set (&mapvals.normal, 0.0, 0.0, 1.0);
+
+ ident_mat (rotmat);
+
+ rotatemat (mapvals.alpha, &mapvals.firstaxis, a);
+
+ matmul (a, rotmat, b);
+
+ memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+ rotatemat (mapvals.beta, &mapvals.secondaxis, a);
+ matmul (a, rotmat, b);
+
+ memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+ rotatemat (mapvals.gamma, &mapvals.normal, a);
+ matmul (a, rotmat, b);
+
+ memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+ /* Set up pixel regions for the box face images */
+ /* ============================================ */
+
+ for (i = 0; i < 6; i++)
+ {
+ box_drawable_ids[i] = mapvals.boxmap_id[i];
+
+ box_buffers[i] = gimp_drawable_get_buffer (box_drawable_ids[i]);
+ }
+
+ break;
+
+ case MAP_CYLINDER:
+ get_ray_color = get_ray_color_cylinder;
+
+ gimp_vector3_set (&mapvals.firstaxis, 1.0, 0.0, 0.0);
+ gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
+ gimp_vector3_set (&mapvals.normal, 0.0, 0.0, 1.0);
+
+ ident_mat (rotmat);
+
+ rotatemat (mapvals.alpha, &mapvals.firstaxis, a);
+
+ matmul (a, rotmat, b);
+
+ memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+ rotatemat (mapvals.beta, &mapvals.secondaxis, a);
+ matmul (a, rotmat, b);
+
+ memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+ rotatemat (mapvals.gamma, &mapvals.normal, a);
+ matmul (a, rotmat, b);
+
+ memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+ /* Set up pixel regions for the cylinder cap images */
+ /* ================================================ */
+
+ for (i = 0; i < 2; i++)
+ {
+ cylinder_drawable_ids[i] = mapvals.cylindermap_id[i];
+
+ cylinder_buffers[i] = gimp_drawable_get_buffer (cylinder_drawable_ids[i]);
+ }
+ break;
+ }
+
+ max_depth = (gint) mapvals.maxdepth;
+}
+
+static void
+render (gdouble x,
+ gdouble y,
+ GimpRGB *col,
+ gpointer data)
+{
+ GimpVector3 pos;
+
+ pos.x = x / (gdouble) width;
+ pos.y = y / (gdouble) height;
+ pos.z = 0.0;
+
+ *col = get_ray_color (&pos);
+}
+
+static void
+show_progress (gint min,
+ gint max,
+ gint curr,
+ gpointer data)
+{
+ gimp_progress_update ((gdouble) curr / (gdouble) max);
+}
+
+/**************************************************/
+/* Performs map-to-sphere on the whole input image */
+/* and updates or creates a new GIMP image. */
+/**************************************************/
+
+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;
+ gboolean insert_layer = FALSE;
+
+ init_compute ();
+
+ if (mapvals.create_new_image)
+ {
+ new_image_id = gimp_image_new (width, height, GIMP_RGB);
+ }
+ else
+ {
+ new_image_id = image_id;
+ }
+
+ gimp_image_undo_group_start (new_image_id);
+
+ if (mapvals.create_new_image ||
+ mapvals.create_new_layer ||
+ (mapvals.transparent_background &&
+ ! gimp_drawable_has_alpha (output_drawable_id)))
+ {
+ gchar *layername[] = {_("Map to plane"),
+ _("Map to sphere"),
+ _("Map to box"),
+ _("Map to cylinder"),
+ _("Background")};
+
+ new_layer_id = gimp_layer_new (new_image_id,
+ layername[mapvals.create_new_image ? 4 :
+ mapvals.maptype],
+ width, height,
+ mapvals.transparent_background ?
+ GIMP_RGBA_IMAGE :
+ GIMP_RGB_IMAGE,
+ 100.0,
+ gimp_image_get_default_new_layer_mode (new_image_id));
+
+ insert_layer = TRUE;
+ output_drawable_id = new_layer_id;
+ }
+
+ dest_buffer = gimp_drawable_get_shadow_buffer (output_drawable_id);
+
+ switch (mapvals.maptype)
+ {
+ case MAP_PLANE:
+ gimp_progress_init (_("Map to plane"));
+ break;
+ case MAP_SPHERE:
+ gimp_progress_init (_("Map to sphere"));
+ break;
+ case MAP_BOX:
+ gimp_progress_init (_("Map to box"));
+ break;
+ case MAP_CYLINDER:
+ gimp_progress_init (_("Map to cylinder"));
+ break;
+ }
+
+ if (! mapvals.antialiasing)
+ {
+ for (ycount = 0; ycount < height; ycount++)
+ {
+ for (xcount = 0; xcount < width; xcount++)
+ {
+ p = int_to_pos (xcount, ycount);
+ color = (* get_ray_color) (&p);
+ poke (xcount, ycount, &color, NULL);
+
+ progress_counter++;
+ }
+
+ gimp_progress_update ((gdouble) progress_counter /
+ (gdouble) maxcounter);
+ }
+ }
+ else
+ {
+ gimp_adaptive_supersample_area (0, 0,
+ width - 1, height - 1,
+ max_depth,
+ mapvals.pixelthreshold,
+ render,
+ NULL,
+ poke,
+ NULL,
+ show_progress,
+ NULL);
+ }
+
+ gimp_progress_update (1.0);
+
+ g_object_unref (source_buffer);
+ g_object_unref (dest_buffer);
+
+ if (insert_layer)
+ gimp_image_insert_layer (new_image_id, new_layer_id, -1, 0);
+
+ gimp_drawable_merge_shadow (output_drawable_id, TRUE);
+ gimp_drawable_update (output_drawable_id, 0, 0, width, height);
+
+ if (new_image_id != image_id)
+ {
+ gimp_display_new (new_image_id);
+ gimp_displays_flush ();
+ }
+
+ gimp_image_undo_group_end (new_image_id);
+}
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