Adding upstream version 2.10.22.upstream/2.10.22upstream

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

1 files changed, 261 insertions, 0 deletions

diff --git a/plug-ins/file-dds/misc.c b/plug-ins/file-dds/misc.c
new file mode 100644
index 0000000..c8c3593
--- /dev/null
+++ b/plug-ins/file-dds/misc.c
@@ -0,0 +1,261 @@
+/*
+ * DDS GIMP plugin
+ *
+ * Copyright (C) 2004-2012 Shawn Kirst <skirst@gmail.com>,
+ * with parts (C) 2003 Arne Reuter <homepage@arnereuter.de> where specified.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 51 Franklin Street, Fifth Floor
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <libgimp/gimp.h>
+#include "misc.h"
+
+static inline float
+saturate (float a)
+{
+  if(a < 0) a = 0;
+  if(a > 1) a = 1;
+
+  return a;
+}
+
+void
+decode_ycocg_image (gint32   drawableID,
+                    gboolean shadow)
+{
+  GeglBuffer *buffer, *sbuffer;
+  const Babl *format;
+  unsigned char *data;
+  unsigned int i, w, h, num_pixels;
+
+  const float offset = 0.5f * 256.0f / 255.0f;
+  float Y, Co, Cg, R, G, B;
+
+  buffer = gimp_drawable_get_buffer (drawableID);
+
+  if (shadow)
+    {
+      sbuffer = gimp_drawable_get_shadow_buffer (drawableID);
+      gegl_buffer_copy (buffer, NULL, GEGL_ABYSS_NONE, sbuffer, NULL);
+      g_object_unref (buffer);
+      buffer = sbuffer;
+    }
+
+  format = babl_format ("R'G'B'A u8");
+
+  w = gegl_buffer_get_width  (buffer);
+  h = gegl_buffer_get_height (buffer);
+  num_pixels = w * h;
+
+  data = g_malloc (num_pixels * 4);
+
+  gegl_buffer_get (buffer, GEGL_RECTANGLE(0, 0, w, h), 1.0, format, data,
+                   GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+  gimp_progress_init ("Decoding YCoCg pixels...");
+
+  for (i = 0; i < num_pixels; ++i)
+    {
+      Y  = (float)data[4 * i + 3] / 255.0f;
+      Co = (float)data[4 * i + 0] / 255.0f;
+      Cg = (float)data[4 * i + 1] / 255.0f;
+
+      /* convert YCoCg to RGB */
+      Co -= offset;
+      Cg -= offset;
+
+      R = saturate(Y + Co - Cg);
+      G = saturate(Y + Cg);
+      B = saturate(Y - Co - Cg);
+
+      /* copy new alpha from blue */
+      data[4 * i + 3] = data[4 * i + 2];
+
+      data[4 * i + 0] = (unsigned char)(R * 255.0f);
+      data[4 * i + 1] = (unsigned char)(G * 255.0f);
+      data[4 * i + 2] = (unsigned char)(B * 255.0f);
+
+      if ((i & 0x7fff) == 0)
+        gimp_progress_update ((float)i / (float)num_pixels);
+    }
+
+  gegl_buffer_set (buffer, GEGL_RECTANGLE(0, 0, w, h), 0, format, data,
+                   GEGL_AUTO_ROWSTRIDE);
+
+  gimp_progress_update (1.0);
+
+  gegl_buffer_flush (buffer);
+
+  if (shadow)
+    gimp_drawable_merge_shadow (drawableID, TRUE);
+
+  gimp_drawable_update (drawableID, 0, 0, w, h);
+
+  g_free (data);
+
+  g_object_unref (buffer);
+}
+
+void
+decode_ycocg_scaled_image (gint32   drawableID,
+                           gboolean shadow)
+{
+  GeglBuffer *buffer, *sbuffer;
+  const Babl *format;
+  unsigned char *data;
+  unsigned int i, w, h, num_pixels;
+
+  const float offset = 0.5f * 256.0f / 255.0f;
+  float Y, Co, Cg, R, G, B, s;
+
+  buffer = gimp_drawable_get_buffer (drawableID);
+
+  if (shadow)
+    {
+      sbuffer = gimp_drawable_get_shadow_buffer(drawableID);
+      gegl_buffer_copy(buffer, NULL, GEGL_ABYSS_NONE, sbuffer, NULL);
+      g_object_unref(buffer);
+      buffer = sbuffer;
+    }
+
+  format = babl_format ("R'G'B'A u8");
+
+  w = gegl_buffer_get_width  (buffer);
+  h = gegl_buffer_get_height (buffer);
+  num_pixels = w * h;
+
+  data = g_malloc (num_pixels * 4);
+
+  gegl_buffer_get (buffer, GEGL_RECTANGLE(0, 0, w, h), 1.0, format, data,
+                   GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+  gimp_progress_init ("Decoding YCoCg (scaled) pixels...");
+
+  for (i = 0; i < num_pixels; ++i)
+    {
+      Y  = (float)data[4 * i + 3] / 255.0f;
+      Co = (float)data[4 * i + 0] / 255.0f;
+      Cg = (float)data[4 * i + 1] / 255.0f;
+      s  = (float)data[4 * i + 2] / 255.0f;
+
+      /* convert YCoCg to RGB */
+      s = 1.0f / ((255.0f / 8.0f) * s + 1.0f);
+
+      Co = (Co - offset) * s;
+      Cg = (Cg - offset) * s;
+
+      R = saturate(Y + Co - Cg);
+      G = saturate(Y + Cg);
+      B = saturate(Y - Co - Cg);
+
+      data[4 * i + 0] = (unsigned char)(R * 255.0f);
+      data[4 * i + 1] = (unsigned char)(G * 255.0f);
+      data[4 * i + 2] = (unsigned char)(B * 255.0f);
+
+      /* set alpha to 1 */
+      data[4 * i + 3] = 255;
+
+      if ((i & 0x7fff) == 0)
+        gimp_progress_update ((float)i / (float)num_pixels);
+    }
+
+  gegl_buffer_set (buffer, GEGL_RECTANGLE(0, 0, w, h), 0, format, data,
+                   GEGL_AUTO_ROWSTRIDE);
+
+  gimp_progress_update (1.0);
+
+  gegl_buffer_flush (buffer);
+
+  if (shadow)
+    gimp_drawable_merge_shadow (drawableID, TRUE);
+
+  gimp_drawable_update (drawableID, 0, 0, w, h);
+
+  g_free (data);
+
+  g_object_unref (buffer);
+}
+
+void
+decode_alpha_exp_image (gint32   drawableID,
+                        gboolean shadow)
+{
+  GeglBuffer *buffer, *sbuffer;
+  const Babl *format;
+  unsigned char *data;
+  unsigned int i, w, h, num_pixels;
+  int R, G, B, A;
+
+  buffer = gimp_drawable_get_buffer (drawableID);
+
+  if (shadow)
+    {
+      sbuffer = gimp_drawable_get_shadow_buffer (drawableID);
+      gegl_buffer_copy (buffer, NULL, GEGL_ABYSS_NONE, sbuffer, NULL);
+      g_object_unref (buffer);
+      buffer = sbuffer;
+    }
+
+  format = babl_format ("R'G'B'A u8");
+
+  w = gegl_buffer_get_width  (buffer);
+  h = gegl_buffer_get_height (buffer);
+  num_pixels = w * h;
+
+  data = g_malloc (num_pixels * 4);
+
+  gegl_buffer_get (buffer, GEGL_RECTANGLE(0, 0, w, h), 1.0, format, data,
+                   GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+  gimp_progress_init ("Decoding Alpha-exponent pixels...");
+
+  for (i = 0; i < num_pixels; ++i)
+    {
+      R = data[4 * i + 0];
+      G = data[4 * i + 1];
+      B = data[4 * i + 2];
+      A = data[4 * i + 3];
+
+      R = (R * A + 1) >> 8;
+      G = (G * A + 1) >> 8;
+      B = (B * A + 1) >> 8;
+      A = 255;
+
+      data[4 * i + 0] = R;
+      data[4 * i + 1] = G;
+      data[4 * i + 2] = B;
+      data[4 * i + 3] = A;
+
+      if ((i & 0x7fff) == 0)
+        gimp_progress_update ((float)i / (float)num_pixels);
+    }
+
+  gegl_buffer_set (buffer, GEGL_RECTANGLE(0, 0, w, h), 0, format, data,
+                   GEGL_AUTO_ROWSTRIDE);
+
+  gimp_progress_update (1.0);
+
+  gegl_buffer_flush (buffer);
+
+  if (shadow)
+    gimp_drawable_merge_shadow (drawableID, TRUE);
+
+  gimp_drawable_update (drawableID, 0, 0, w, h);
+
+  g_free (data);
+
+  g_object_unref (buffer);
+}