Adding upstream version 2.10.36.upstream/2.10.36

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 410 insertions, 0 deletions

diff --git a/plug-ins/lighting/lighting-image.c b/plug-ins/lighting/lighting-image.c
new file mode 100644
index 0000000..671176f
--- /dev/null
+++ b/plug-ins/lighting/lighting-image.c
@@ -0,0 +1,410 @@
+/*************************************/
+/* GIMP image manipulation routines. */
+/*************************************/
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+
+#include <libgimp/gimp.h>
+
+#include "lighting-main.h"
+#include "lighting-image.h"
+#include "lighting-preview.h"
+#include "lighting-ui.h"
+
+
+gint32      input_drawable_id;
+gint32      output_drawable_id;
+GeglBuffer *source_buffer;
+GeglBuffer *dest_buffer;
+
+gint32      bump_drawable_id;
+GeglBuffer *bump_buffer;
+const Babl *bump_format;
+
+gint32      env_drawable_id;
+GeglBuffer *env_buffer;
+
+guchar          *preview_rgb_data = NULL;
+gint             preview_rgb_stride;
+cairo_surface_t *preview_surface = NULL;
+
+glong   maxcounter;
+gint    width, height;
+gint    env_width, env_height;
+GimpRGB background;
+
+gint border_x1, border_y1, border_x2, border_y2;
+
+guchar sinemap[256], spheremap[256], logmap[256];
+
+/******************/
+/* Implementation */
+/******************/
+
+guchar
+peek_map (GeglBuffer *buffer,
+          const Babl *format,
+	  gint        x,
+	  gint        y)
+{
+  guchar data[4];
+  guchar ret_val;
+
+  gegl_buffer_sample (buffer, x, y, NULL, data, format,
+                      GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
+
+  if (babl_format_get_bytes_per_pixel (format))
+    {
+      ret_val = data[0];
+    }
+  else
+    {
+      ret_val = (guchar)((float)((data[0] + data[1] + data[2])/3.0));
+    }
+
+  return ret_val;
+}
+
+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;
+}
+
+GimpRGB
+peek_env_map (gint x,
+	      gint y)
+{
+  GimpRGB color;
+
+  if (x < 0)
+    x = 0;
+  else if (x >= env_width)
+    x = env_width - 1;
+  if (y < 0)
+    y = 0;
+  else if (y >= env_height)
+    y = env_height - 1;
+
+  gegl_buffer_sample (env_buffer, x, y, NULL,
+                      &color, babl_format ("R'G'B'A double"),
+                      GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
+
+  color.a = 1.0;
+
+  return color;
+}
+
+void
+poke (gint    x,
+      gint    y,
+      GimpRGB *color)
+{
+  if (x < 0)
+    x = 0;
+  else if (x >= width)
+    x = width - 1;
+  if (y < 0)
+    y = 0;
+  else if (y >= height)
+    y = height - 1;
+
+  gegl_buffer_set (dest_buffer, GEGL_RECTANGLE (x, y, 1, 1), 0,
+                   babl_format ("R'G'B'A double"), color,
+                   GEGL_AUTO_ROWSTRIDE);
+}
+
+gint
+check_bounds (gint x,
+	      gint y)
+{
+  if (x < border_x1 ||
+      y < border_y1 ||
+      x >= border_x2 ||
+      y >= border_y2)
+    return FALSE;
+  else
+    return TRUE;
+}
+
+GimpVector3
+int_to_pos (gint x,
+	    gint y)
+{
+  GimpVector3 pos;
+
+  if (width >= height)
+    {
+      pos.x = (gdouble) x / (gdouble) width;
+      pos.y = (gdouble) y / (gdouble) width;
+
+      pos.y += 0.5 * (1.0 - (gdouble) height / (gdouble) width);
+    }
+  else
+    {
+      pos.x = (gdouble) x / (gdouble) height;
+      pos.y = (gdouble) y / (gdouble) height;
+
+      pos.x += 0.5 * (1.0 - (gdouble) width / (gdouble) height);
+    }
+
+  pos.z = 0.0;
+  return pos;
+}
+
+GimpVector3
+int_to_posf (gdouble x,
+	     gdouble y)
+{
+  GimpVector3 pos;
+
+  if (width >= height)
+    {
+      pos.x = x / (gdouble) width;
+      pos.y = y / (gdouble) width;
+
+      pos.y += 0.5 * (1.0 - (gdouble) height / (gdouble) width);
+    }
+  else
+    {
+      pos.x = x / (gdouble) height;
+      pos.y = y / (gdouble) height;
+
+      pos.x += 0.5 * (1.0 - (gdouble) width / (gdouble) height);
+    }
+
+  pos.z = 0.0;
+  return pos;
+}
+
+void
+pos_to_int (gdouble  x,
+	    gdouble  y,
+	    gint    *scr_x,
+	    gint    *scr_y)
+{
+  if (width >= height)
+    {
+      y -= 0.5 * (1.0 - (gdouble) height / (gdouble) width);
+      *scr_x = RINT ((x * (gdouble) width));
+      *scr_y = RINT ((y * (gdouble) width));
+    }
+  else
+    {
+      x -= 0.5 * (1.0 - (gdouble) width / (gdouble) height);
+
+      *scr_x = RINT ((x * (gdouble) height));
+      *scr_y = RINT ((y  *(gdouble) height));
+    }
+}
+
+void
+pos_to_float (gdouble  x,
+	      gdouble  y,
+	      gdouble *xf,
+	      gdouble *yf)
+{
+  if (width >= height)
+    {
+      y -= 0.5 * (1.0 - (gdouble) height / (gdouble) width);
+
+      *xf = x * (gdouble) (width-1);
+      *yf = y * (gdouble) (width-1);
+    }
+  else
+    {
+      x -= 0.5 * (1.0 - (gdouble) width / (gdouble) height);
+
+      *xf = x * (gdouble) (height-1);
+      *yf = y * (gdouble) (height-1);
+    }
+}
+
+/**********************************************/
+/* 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];
+
+  x1 = RINT (u);
+  y1 = RINT (v);
+
+  if (check_bounds (x1, y1) == FALSE)
+    {
+      *inside = FALSE;
+      return background;
+    }
+
+  x2 = (x1 + 1);
+  y2 = (y1 + 1);
+
+  if (check_bounds (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, v, p);
+}
+
+gdouble
+get_map_value (GeglBuffer *buffer,
+               const Babl *format,
+	       gdouble     u,
+	       gdouble     v,
+	       gint       *inside)
+{
+  gint    x1, y1, x2, y2;
+  gdouble p[4];
+
+  x1 = RINT (u);
+  y1 = RINT (v);
+
+  x2 = (x1 + 1);
+  y2 = (y1 + 1);
+
+  if (check_bounds (x2, y2) == FALSE)
+    {
+      *inside = TRUE;
+      return (gdouble) peek_map (buffer, format, x1, y1);
+    }
+
+  *inside = TRUE;
+  p[0] = (gdouble) peek_map (buffer, format, x1, y1);
+  p[1] = (gdouble) peek_map (buffer, format, x2, y1);
+  p[2] = (gdouble) peek_map (buffer, format, x1, y2);
+  p[3] = (gdouble) peek_map (buffer, format, x2, y2);
+
+  return gimp_bilinear (u, v, p);
+}
+
+static void
+compute_maps (void)
+{
+  gint    x;
+  gdouble val, c, d;
+
+  /* Compute Sine, Log and Spherical transfer function maps */
+  /* ====================================================== */
+
+  c = 1.0  / 255.0;
+  d = 1.15 * 255.0;
+
+  for (x = 0; x < 256; x++)
+    {
+      sinemap[x] = (guchar) (255.0 * (0.5 * (sin ((G_PI * c * (gdouble) x) -
+						  0.5 * G_PI) +
+					     1.0)));
+      spheremap[x] = (guchar) (255.0 * (sqrt (sin (G_PI * (gdouble) x /
+						   512.0))));
+      val = (d * exp (-1.0 / (8.0 * c * ((gdouble) x + 5.0))));
+
+      if (val > 255.0)
+        val = 255.0;
+      logmap[x] = (guchar) val;
+    }
+}
+
+/****************************************/
+/* Allocate memory for temporary images */
+/****************************************/
+
+gint
+image_setup (gint32 drawable_id,
+	     gint   interactive)
+{
+  gint	   w, h;
+  gboolean ret;
+
+  compute_maps ();
+
+  /* Get some useful info on the input drawable */
+  /* ========================================== */
+
+  input_drawable_id  = drawable_id;
+  output_drawable_id = drawable_id;
+
+  ret = gimp_drawable_mask_intersect (drawable_id,
+                                      &border_x1, &border_y1, &w, &h);
+
+  border_x2 = border_x1 + w;
+  border_y2 = border_y1 + h;
+
+  if (! ret)
+    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 (interactive)
+    {
+      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;
+}
+
+void
+bumpmap_setup (gint32 bumpmap_id)
+{
+  if (bumpmap_id != -1)
+    {
+      if (! bump_buffer)
+        {
+          bump_buffer = gimp_drawable_get_buffer (bumpmap_id);
+        }
+
+      if (gimp_drawable_is_rgb (bumpmap_id))
+        bump_format = babl_format ("R'G'B' u8");
+      else
+        bump_format = babl_format ("Y' u8"); /* FIXME */
+    }
+}
+
+void
+envmap_setup (gint32 envmap_id)
+{
+  if (envmap_id != -1 && ! env_buffer)
+    {
+      env_width  = gimp_drawable_width  (envmap_id);
+      env_height = gimp_drawable_height (envmap_id);
+
+      env_buffer = gimp_drawable_get_buffer (envmap_id);
+    }
+}