mirror of https://github.com/GNOME/gimp.git
336 lines
9.7 KiB
C
336 lines
9.7 KiB
C
/******************************************************/
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/* Apply mapping and shading on the whole input image */
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/******************************************************/
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#include "config.h"
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#include <string.h>
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#include <gtk/gtk.h>
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#include <libgimp/gimp.h>
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#include <libgimp/gimpui.h>
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#include "map-object-main.h"
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#include "map-object-image.h"
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#include "map-object-shade.h"
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#include "map-object-apply.h"
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#include "libgimp/stdplugins-intl.h"
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/*************/
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/* Main loop */
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/*************/
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gdouble imat[4][4];
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gfloat rotmat[16];
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static gfloat a[16], b[16];
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void
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init_compute (void)
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{
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gint i;
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switch (mapvals.maptype)
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{
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case MAP_SPHERE:
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/* Rotate the equator/northpole axis */
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/* ================================= */
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gimp_vector3_set (&mapvals.firstaxis, 0.0, 0.0, -1.0);
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gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
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gimp_vector3_rotate (&mapvals.firstaxis,
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gimp_deg_to_rad (mapvals.alpha),
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gimp_deg_to_rad (mapvals.beta),
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gimp_deg_to_rad (mapvals.gamma));
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gimp_vector3_rotate (&mapvals.secondaxis,
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gimp_deg_to_rad (mapvals.alpha),
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gimp_deg_to_rad (mapvals.beta),
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gimp_deg_to_rad (mapvals.gamma));
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/* Compute the 2D bounding box of the sphere spanned by the axis */
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/* ============================================================= */
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compute_bounding_box ();
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get_ray_color = get_ray_color_sphere;
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break;
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case MAP_PLANE:
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/* Rotate the plane axis */
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/* ===================== */
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gimp_vector3_set (&mapvals.firstaxis, 1.0, 0.0, 0.0);
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gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
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gimp_vector3_set (&mapvals.normal, 0.0, 0.0, 1.0);
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gimp_vector3_rotate (&mapvals.firstaxis,
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gimp_deg_to_rad (mapvals.alpha),
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gimp_deg_to_rad (mapvals.beta),
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gimp_deg_to_rad (mapvals.gamma));
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gimp_vector3_rotate (&mapvals.secondaxis,
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gimp_deg_to_rad (mapvals.alpha),
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gimp_deg_to_rad (mapvals.beta),
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gimp_deg_to_rad (mapvals.gamma));
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mapvals.normal = gimp_vector3_cross_product (&mapvals.firstaxis,
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&mapvals.secondaxis);
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if (mapvals.normal.z < 0.0)
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gimp_vector3_mul (&mapvals.normal, -1.0);
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/* Initialize intersection matrix */
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/* ============================== */
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imat[0][1] = -mapvals.firstaxis.x;
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imat[1][1] = -mapvals.firstaxis.y;
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imat[2][1] = -mapvals.firstaxis.z;
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imat[0][2] = -mapvals.secondaxis.x;
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imat[1][2] = -mapvals.secondaxis.y;
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imat[2][2] = -mapvals.secondaxis.z;
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imat[0][3] = mapvals.position.x - mapvals.viewpoint.x;
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imat[1][3] = mapvals.position.y - mapvals.viewpoint.y;
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imat[2][3] = mapvals.position.z - mapvals.viewpoint.z;
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get_ray_color = get_ray_color_plane;
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break;
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case MAP_BOX:
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get_ray_color = get_ray_color_box;
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gimp_vector3_set (&mapvals.firstaxis, 1.0, 0.0, 0.0);
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gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
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gimp_vector3_set (&mapvals.normal, 0.0, 0.0, 1.0);
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ident_mat (rotmat);
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rotatemat (mapvals.alpha, &mapvals.firstaxis, a);
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matmul (a, rotmat, b);
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memcpy (rotmat, b, sizeof (gfloat) * 16);
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rotatemat (mapvals.beta, &mapvals.secondaxis, a);
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matmul (a, rotmat, b);
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memcpy (rotmat, b, sizeof (gfloat) * 16);
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rotatemat (mapvals.gamma, &mapvals.normal, a);
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matmul (a, rotmat, b);
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memcpy (rotmat, b, sizeof (gfloat) * 16);
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/* Set up pixel regions for the box face images */
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/* ============================================ */
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for (i = 0; i < 6; i++)
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{
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box_drawables[i] = gimp_drawable_get (mapvals.boxmap_id[i]);
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gimp_pixel_rgn_init (&box_regions[i], box_drawables[i],
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0, 0,
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box_drawables[i]->width,
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box_drawables[i]->height,
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FALSE, FALSE);
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}
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break;
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case MAP_CYLINDER:
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get_ray_color = get_ray_color_cylinder;
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gimp_vector3_set (&mapvals.firstaxis, 1.0, 0.0, 0.0);
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gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
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gimp_vector3_set (&mapvals.normal, 0.0, 0.0, 1.0);
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ident_mat (rotmat);
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rotatemat (mapvals.alpha, &mapvals.firstaxis, a);
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matmul (a, rotmat, b);
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memcpy (rotmat, b, sizeof (gfloat) * 16);
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rotatemat (mapvals.beta, &mapvals.secondaxis, a);
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matmul (a, rotmat, b);
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memcpy (rotmat, b, sizeof (gfloat) * 16);
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rotatemat (mapvals.gamma, &mapvals.normal, a);
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matmul (a, rotmat, b);
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memcpy (rotmat, b, sizeof (gfloat) * 16);
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/* Set up pixel regions for the cylinder cap images */
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/* ================================================ */
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for (i = 0; i < 2; i++)
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{
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cylinder_drawables[i] =
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gimp_drawable_get (mapvals.cylindermap_id[i]);
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gimp_pixel_rgn_init (&cylinder_regions[i], cylinder_drawables[i],
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0, 0,
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cylinder_drawables[i]->width,
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cylinder_drawables[i]->height,
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FALSE, FALSE);
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}
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break;
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}
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max_depth = (gint) mapvals.maxdepth;
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}
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static void
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render (gdouble x,
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gdouble y,
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GimpRGB *col,
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gpointer data)
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{
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GimpVector3 pos;
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pos.x = x / (gdouble) width;
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pos.y = y / (gdouble) height;
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pos.z = 0.0;
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*col = get_ray_color (&pos);
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}
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static void
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show_progress (gint min,
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gint max,
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gint curr,
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gpointer data)
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{
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gimp_progress_update ((gdouble) curr / (gdouble) max);
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}
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/**************************************************/
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/* Performs map-to-sphere on the whole input image */
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/* and updates or creates a new GIMP image. */
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/**************************************************/
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void
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compute_image (void)
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{
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gint xcount, ycount;
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GimpRGB color;
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glong progress_counter = 0;
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GimpVector3 p;
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gint32 new_image_id = -1;
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gint32 new_layer_id = -1;
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gboolean insert_layer = FALSE;
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init_compute ();
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if (mapvals.create_new_image)
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{
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new_image_id = gimp_image_new (width, height, GIMP_RGB);
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}
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else
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{
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new_image_id = image_id;
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}
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gimp_image_undo_group_start (new_image_id);
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if (mapvals.create_new_image ||
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mapvals.create_new_layer ||
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(mapvals.transparent_background &&
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output_drawable->bpp != 4))
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{
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gchar *layername[] = {_("Map to plane"), _("Map to sphere"), _("Map to box"),
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_("Map to cylinder"), _("Background")};
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new_layer_id = gimp_layer_new (new_image_id,
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layername[mapvals.create_new_image ? 4 :
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mapvals.maptype],
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width, height,
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mapvals.transparent_background ?
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GIMP_RGBA_IMAGE :
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GIMP_RGB_IMAGE,
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100.0,
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GIMP_LAYER_MODE_NORMAL_LEGACY);
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insert_layer = TRUE;
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output_drawable = gimp_drawable_get (new_layer_id);
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}
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gimp_pixel_rgn_init (&dest_region, output_drawable,
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0, 0, width, height, TRUE, TRUE);
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switch (mapvals.maptype)
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{
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case MAP_PLANE:
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gimp_progress_init (_("Map to plane"));
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break;
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case MAP_SPHERE:
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gimp_progress_init (_("Map to sphere"));
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break;
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case MAP_BOX:
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gimp_progress_init (_("Map to box"));
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break;
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case MAP_CYLINDER:
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gimp_progress_init (_("Map to cylinder"));
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break;
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}
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if (mapvals.antialiasing == FALSE)
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{
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for (ycount = 0; ycount < height; ycount++)
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{
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for (xcount = 0; xcount < width; xcount++)
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{
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p = int_to_pos (xcount, ycount);
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color = (* get_ray_color) (&p);
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poke (xcount, ycount, &color, NULL);
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if ((progress_counter++ % width) == 0)
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gimp_progress_update ((gdouble) progress_counter /
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(gdouble) maxcounter);
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}
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}
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}
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else
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{
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gimp_adaptive_supersample_area (0, 0,
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width - 1, height - 1,
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max_depth,
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mapvals.pixeltreshold,
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render,
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NULL,
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poke,
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NULL,
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show_progress,
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NULL);
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}
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gimp_progress_update (1.0);
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/* Update the region */
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/* ================= */
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gimp_drawable_flush (output_drawable);
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if (insert_layer)
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gimp_image_insert_layer (new_image_id, new_layer_id, -1, 0);
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gimp_drawable_merge_shadow (output_drawable->drawable_id, TRUE);
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gimp_drawable_update (output_drawable->drawable_id, 0, 0, width, height);
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if (new_image_id != image_id)
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{
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gimp_display_new (new_image_id);
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gimp_displays_flush ();
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gimp_drawable_detach (output_drawable);
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}
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gimp_image_undo_group_end (new_image_id);
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}
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