summaryrefslogtreecommitdiffstats
path: root/plug-ins/map-object/map-object-image.c
diff options
context:
space:
mode:
Diffstat (limited to 'plug-ins/map-object/map-object-image.c')
-rw-r--r--plug-ins/map-object/map-object-image.c352
1 files changed, 352 insertions, 0 deletions
diff --git a/plug-ins/map-object/map-object-image.c b/plug-ins/map-object/map-object-image.c
new file mode 100644
index 0000000..1f16279
--- /dev/null
+++ b/plug-ins/map-object/map-object-image.c
@@ -0,0 +1,352 @@
+/*********************************************************/
+/* Image manipulation routines. Calls mapobject_shade.c */
+/* functions to compute the shading of the image at each */
+/* pixel. These routines are used by the functions in */
+/* mapobject_preview.c and mapobject_apply.c */
+/*********************************************************/
+
+#include "config.h"
+
+#include <string.h>
+
+#include <sys/types.h>
+
+#include <gtk/gtk.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "map-object-main.h"
+#include "map-object-preview.h"
+#include "map-object-shade.h"
+#include "map-object-ui.h"
+#include "map-object-image.h"
+
+
+gint32 input_drawable_id;
+gint32 output_drawable_id;
+GeglBuffer *source_buffer;
+GeglBuffer *dest_buffer;
+
+gint32 box_drawable_ids[6];
+GeglBuffer *box_buffers[6];
+
+gint32 cylinder_drawable_ids[2];
+GeglBuffer *cylinder_buffers[2];
+
+guchar *preview_rgb_data = NULL;
+gint preview_rgb_stride;
+cairo_surface_t *preview_surface = NULL;
+
+glong maxcounter, old_depth, max_depth;
+gint width, height, image_id;
+GimpRGB background;
+
+gint border_x, border_y, border_w, border_h;
+
+/******************/
+/* Implementation */
+/******************/
+
+GimpRGB
+peek (gint x,
+ gint y)
+{
+ GimpRGB color;
+
+ gegl_buffer_sample (source_buffer, x, y, NULL,
+ &color, babl_format ("R'G'B'A double"),
+ GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
+
+ if (! babl_format_has_alpha (gegl_buffer_get_format (source_buffer)))
+ color.a = 1.0;
+
+ return color;
+}
+
+static GimpRGB
+peek_box_image (gint image,
+ gint x,
+ gint y)
+{
+ GimpRGB color;
+
+ gegl_buffer_sample (box_buffers[image], x, y, NULL,
+ &color, babl_format ("R'G'B'A double"),
+ GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
+
+ if (! babl_format_has_alpha (gegl_buffer_get_format (box_buffers[image])))
+ color.a = 1.0;
+
+ return color;
+}
+
+static GimpRGB
+peek_cylinder_image (gint image,
+ gint x,
+ gint y)
+{
+ GimpRGB color;
+
+ gegl_buffer_sample (cylinder_buffers[image], x, y, NULL,
+ &color, babl_format ("R'G'B'A double"),
+ GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
+
+ if (! babl_format_has_alpha (gegl_buffer_get_format (cylinder_buffers[image])))
+ color.a = 1.0;
+
+ return color;
+}
+
+void
+poke (gint x,
+ gint y,
+ GimpRGB *color,
+ gpointer user_data)
+{
+ gegl_buffer_set (dest_buffer, GEGL_RECTANGLE (x, y, 1, 1), 0,
+ babl_format ("R'G'B'A double"), color,
+ GEGL_AUTO_ROWSTRIDE);
+}
+
+gint
+checkbounds (gint x,
+ gint y)
+{
+ if (x < border_x ||
+ y < border_y ||
+ x >= border_x + border_w ||
+ y >= border_y + border_h)
+ return FALSE;
+ else
+ return TRUE;
+}
+
+static gint
+checkbounds_box_image (gint image,
+ gint x,
+ gint y)
+{
+ gint w, h;
+
+ w = gegl_buffer_get_width (box_buffers[image]);
+ h = gegl_buffer_get_height (box_buffers[image]);
+
+ if (x < 0 || y < 0 || x >= w || y >= h)
+ return FALSE ;
+ else
+ return TRUE ;
+}
+
+static gint
+checkbounds_cylinder_image (gint image,
+ gint x,
+ gint y)
+{
+ gint w, h;
+
+ w = gegl_buffer_get_width (cylinder_buffers[image]);
+ h = gegl_buffer_get_height (cylinder_buffers[image]);
+
+ if (x < 0 || y < 0 || x >= w || y >= h)
+ return FALSE;
+ else
+ return TRUE;
+}
+
+GimpVector3
+int_to_pos (gint x,
+ gint y)
+{
+ GimpVector3 pos;
+
+ pos.x = (gdouble) x / (gdouble) width;
+ pos.y = (gdouble) y / (gdouble) height;
+ pos.z = 0.0;
+
+ return pos;
+}
+
+void
+pos_to_int (gdouble x,
+ gdouble y,
+ gint *scr_x,
+ gint *scr_y)
+{
+ *scr_x = (gint) ((x * (gdouble) width));
+ *scr_y = (gint) ((y * (gdouble) height));
+}
+
+/**********************************************/
+/* Compute the image color at pos (u,v) using */
+/* Quartics bilinear interpolation stuff. */
+/**********************************************/
+
+GimpRGB
+get_image_color (gdouble u,
+ gdouble v,
+ gint *inside)
+{
+ gint x1, y1, x2, y2;
+ GimpRGB p[4];
+
+ pos_to_int (u, v, &x1, &y1);
+
+ if (mapvals.tiled == TRUE)
+ {
+ *inside = TRUE;
+
+ if (x1 < 0) x1 = (width-1) - (-x1 % width);
+ else x1 = x1 % width;
+
+ if (y1 < 0) y1 = (height-1) - (-y1 % height);
+ else y1 = y1 % height;
+
+ x2 = (x1 + 1) % width;
+ y2 = (y1 + 1) % height;
+
+ p[0] = peek (x1, y1);
+ p[1] = peek (x2, y1);
+ p[2] = peek (x1, y2);
+ p[3] = peek (x2, y2);
+
+ return gimp_bilinear_rgba (u * width, v * height, p);
+ }
+
+ if (checkbounds (x1, y1) == FALSE)
+ {
+ *inside =FALSE;
+
+ return background;
+ }
+
+ x2 = (x1 + 1);
+ y2 = (y1 + 1);
+
+ if (checkbounds (x2, y2) == FALSE)
+ {
+ *inside = TRUE;
+
+ return peek (x1, y1);
+ }
+
+ *inside=TRUE;
+
+ p[0] = peek (x1, y1);
+ p[1] = peek (x2, y1);
+ p[2] = peek (x1, y2);
+ p[3] = peek (x2, y2);
+
+ return gimp_bilinear_rgba (u * width, v * height, p);
+}
+
+GimpRGB
+get_box_image_color (gint image,
+ gdouble u,
+ gdouble v)
+{
+ gint w, h;
+ gint x1, y1, x2, y2;
+ GimpRGB p[4];
+
+ w = gegl_buffer_get_width (box_buffers[image]);
+ h = gegl_buffer_get_height (box_buffers[image]);
+
+ x1 = (gint) ((u * (gdouble) w));
+ y1 = (gint) ((v * (gdouble) h));
+
+ if (checkbounds_box_image (image, x1, y1) == FALSE)
+ return background;
+
+ x2 = (x1 + 1);
+ y2 = (y1 + 1);
+
+ if (checkbounds_box_image (image, x2, y2) == FALSE)
+ return peek_box_image (image, x1,y1);
+
+ p[0] = peek_box_image (image, x1, y1);
+ p[1] = peek_box_image (image, x2, y1);
+ p[2] = peek_box_image (image, x1, y2);
+ p[3] = peek_box_image (image, x2, y2);
+
+ return gimp_bilinear_rgba (u * w, v * h, p);
+}
+
+GimpRGB
+get_cylinder_image_color (gint image,
+ gdouble u,
+ gdouble v)
+{
+ gint w, h;
+ gint x1, y1, x2, y2;
+ GimpRGB p[4];
+
+ w = gegl_buffer_get_width (cylinder_buffers[image]);
+ h = gegl_buffer_get_height (cylinder_buffers[image]);
+
+ x1 = (gint) ((u * (gdouble) w));
+ y1 = (gint) ((v * (gdouble) h));
+
+ if (checkbounds_cylinder_image (image, x1, y1) == FALSE)
+ return background;
+
+ x2 = (x1 + 1);
+ y2 = (y1 + 1);
+
+ if (checkbounds_cylinder_image (image, x2, y2) == FALSE)
+ return peek_cylinder_image (image, x1,y1);
+
+ p[0] = peek_cylinder_image (image, x1, y1);
+ p[1] = peek_cylinder_image (image, x2, y1);
+ p[2] = peek_cylinder_image (image, x1, y2);
+ p[3] = peek_cylinder_image (image, x2, y2);
+
+ return gimp_bilinear_rgba (u * w, v * h, p);
+}
+
+/****************************************/
+/* Allocate memory for temporary images */
+/****************************************/
+
+gint
+image_setup (gint32 drawable_id,
+ gint interactive)
+{
+ input_drawable_id = drawable_id;
+ output_drawable_id = drawable_id;
+
+ if (! gimp_drawable_mask_intersect (drawable_id, &border_x, &border_y,
+ &border_w, &border_h))
+ return FALSE;
+
+ width = gimp_drawable_width (input_drawable_id);
+ height = gimp_drawable_height (input_drawable_id);
+
+ source_buffer = gimp_drawable_get_buffer (input_drawable_id);
+
+ maxcounter = (glong) width * (glong) height;
+
+ if (mapvals.transparent_background == TRUE)
+ {
+ gimp_rgba_set (&background, 0.0, 0.0, 0.0, 0.0);
+ }
+ else
+ {
+ gimp_context_get_background (&background);
+ gimp_rgb_set_alpha (&background, 1.0);
+ }
+
+ if (interactive == TRUE)
+ {
+ preview_rgb_stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24,
+ PREVIEW_WIDTH);
+ preview_rgb_data = g_new0 (guchar, preview_rgb_stride * PREVIEW_HEIGHT);
+ preview_surface = cairo_image_surface_create_for_data (preview_rgb_data,
+ CAIRO_FORMAT_RGB24,
+ PREVIEW_WIDTH,
+ PREVIEW_HEIGHT,
+ preview_rgb_stride);
+ }
+
+ return TRUE;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-02 05:20:44 +0000