mirror of https://github.com/GNOME/gimp.git
157 lines
3.9 KiB
C
157 lines
3.9 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 <sys/types.h>
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#include <libgimp/gimp.h>
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#include "lighting-main.h"
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#include "lighting-image.h"
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#include "lighting-shade.h"
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#include "lighting-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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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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gint32 index;
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guchar *row = NULL;
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guchar obpp;
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gboolean has_alpha;
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get_ray_func ray_func;
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if (mapvals.create_new_image == TRUE ||
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(mapvals.transparent_background == TRUE &&
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! gimp_drawable_has_alpha (input_drawable->drawable_id)))
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{
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/* Create a new image */
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/* ================== */
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new_image_id = gimp_image_new (width, height, GIMP_RGB);
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if (mapvals.transparent_background == TRUE)
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{
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/* Add a layer with an alpha channel */
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/* ================================= */
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new_layer_id = gimp_layer_new (new_image_id, "Background",
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width, height,
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GIMP_RGBA_IMAGE,
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100.0,
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GIMP_NORMAL_MODE);
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}
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else
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{
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/* Create a "normal" layer */
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/* ======================= */
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new_layer_id = gimp_layer_new (new_image_id, "Background",
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width, height,
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GIMP_RGB_IMAGE,
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100.0,
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GIMP_NORMAL_MODE);
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}
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gimp_image_insert_layer (new_image_id, new_layer_id, -1, 0);
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output_drawable = gimp_drawable_get (new_layer_id);
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}
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if (mapvals.bump_mapped == TRUE && mapvals.bumpmap_id != -1)
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{
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gimp_pixel_rgn_init (&bump_region, gimp_drawable_get (mapvals.bumpmap_id),
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0, 0, width, height, FALSE, FALSE);
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}
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precompute_init (width, height);
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if (!mapvals.env_mapped || mapvals.envmap_id == -1)
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{
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ray_func = get_ray_color;
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}
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else
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{
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env_width = gimp_drawable_width (mapvals.envmap_id);
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env_height = gimp_drawable_height (mapvals.envmap_id);
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gimp_pixel_rgn_init (&env_region, gimp_drawable_get (mapvals.envmap_id),
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0, 0, env_width, env_height, FALSE, FALSE);
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ray_func = get_ray_color_ref;
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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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obpp = gimp_drawable_bpp (output_drawable->drawable_id);
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has_alpha = gimp_drawable_has_alpha (output_drawable->drawable_id);
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row = g_new (guchar, obpp * width);
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gimp_progress_init (_("Lighting Effects"));
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/* Init the first row */
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if (mapvals.bump_mapped == TRUE && mapvals.bumpmap_id != -1 && height >= 2)
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interpol_row (0, width, 0);
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for (ycount = 0; ycount < height; ycount++)
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{
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if (mapvals.bump_mapped == TRUE && mapvals.bumpmap_id != -1)
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precompute_normals (0, width, ycount);
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index = 0;
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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 = (* ray_func) (&p);
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row[index++] = (guchar) (color.r * 255.0);
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row[index++] = (guchar) (color.g * 255.0);
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row[index++] = (guchar) (color.b * 255.0);
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if (has_alpha)
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row[index++] = (guchar) (color.a * 255.0);
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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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gimp_pixel_rgn_set_row (&dest_region, row, 0, ycount, width);
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}
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gimp_progress_update (1.0);
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g_free (row);
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/* Update image */
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/* ============ */
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gimp_drawable_flush (output_drawable);
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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!=-1)
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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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}
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