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/******************************************************/
/* 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 "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->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_NORMAL_MODE);
}
else
{
/* Create a "normal" layer */
/* ======================= */
new_layer_id = gimp_layer_new (new_image_id, "Background",
width, height,
GIMP_RGB_IMAGE,
100.0,
GIMP_NORMAL_MODE);
}
gimp_image_add_layer (new_image_id, new_layer_id, 0);
output_drawable = gimp_drawable_get (new_layer_id);
}
if (mapvals.bump_mapped == TRUE && mapvals.bumpmap_id != -1)
{
gimp_pixel_rgn_init (&bump_region, gimp_drawable_get (mapvals.bumpmap_id),
0, 0, width, height, FALSE, FALSE);
}
precompute_init (width, height);
if (!mapvals.env_mapped || mapvals.envmap_id == -1)
{
ray_func = get_ray_color;
}
else
{
env_width = gimp_drawable_width (mapvals.envmap_id);
env_height = gimp_drawable_height (mapvals.envmap_id);
gimp_pixel_rgn_init (&env_region, gimp_drawable_get (mapvals.envmap_id),
0, 0, env_width, env_height, FALSE, FALSE);
ray_func = get_ray_color_ref;
}
gimp_pixel_rgn_init (&dest_region, output_drawable,
0, 0, width, height, TRUE, TRUE);
obpp = gimp_drawable_bpp (output_drawable->drawable_id);
has_alpha = gimp_drawable_has_alpha (output_drawable->drawable_id);
row = g_new (guchar, obpp * width);
gimp_progress_init (_("Lighting Effects..."));
/* if (mapvals.antialiasing==FALSE)
{ */
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);
if ((progress_counter++ % width) == 0)
gimp_progress_update ((gdouble) progress_counter /
(gdouble) maxcounter);
}
gimp_pixel_rgn_set_row (&dest_region, row, 0, ycount, width);
}
g_free (row);
/* Update image */
/* ============ */
gimp_drawable_flush (output_drawable);
gimp_drawable_merge_shadow (output_drawable->drawable_id, TRUE);
gimp_drawable_update (output_drawable->drawable_id, 0, 0, width, height);
if (new_image_id!=-1)
{
gimp_display_new (new_image_id);
gimp_displays_flush ();
gimp_drawable_detach (output_drawable);
}
}
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