Adding upstream version 2.10.34.upstream/2.10.34upstream

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

1 files changed, 96 insertions, 0 deletions

diff --git a/plug-ins/file-dds/color.h b/plug-ins/file-dds/color.h
new file mode 100644
index 0000000..70bdb3a
--- /dev/null
+++ b/plug-ins/file-dds/color.h
@@ -0,0 +1,96 @@
+/*
+ * 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 3 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.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __COLOR_H__
+#define __COLOR_H__
+
+#include "imath.h"
+
+/* sRGB encoding/decoding */
+int linear_to_sRGB(int c);
+int sRGB_to_linear(int c);
+
+/* YCoCg encoding */
+static inline void
+RGB_to_YCoCg (unsigned char *dst, int r, int g, int b)
+{
+  int y  = ((r +     (g << 1) + b) + 2) >> 2;
+  int co = ((((r << 1) - (b << 1)) + 2) >> 2) + 128;
+  int cg = (((-r +   (g << 1) - b) + 2) >> 2) + 128;
+
+  dst[0] = 255;
+  dst[1] = (cg > 255 ? 255 : (cg < 0 ? 0 : cg));
+  dst[2] = (co > 255 ? 255 : (co < 0 ? 0 : co));
+  dst[3] = (y  > 255 ? 255 : (y  < 0 ? 0 :  y));
+}
+
+/* other color conversions */
+
+static inline int
+rgb_to_luminance (int r, int g, int b)
+{
+  /* ITU-R BT.709 luma coefficients, scaled by 256 */
+  return ((r * 54 + g * 182 + b * 20) + 128) >> 8;
+}
+
+static inline unsigned short
+pack_r5g6b5 (int r, int g, int b)
+{
+  return (mul8bit(r, 31) << 11) |
+         (mul8bit(g, 63) <<  5) |
+         (mul8bit(b, 31)      );
+}
+
+static inline unsigned short
+pack_rgba4 (int r, int g, int b, int a)
+{
+  return (mul8bit(a, 15) << 12) |
+         (mul8bit(r, 15) <<  8) |
+         (mul8bit(g, 15) <<  4) |
+         (mul8bit(b, 15)      );
+}
+
+static inline unsigned short
+pack_rgb5a1 (int r, int g, int b, int a)
+{
+  return (((a >> 7) & 0x01) << 15) |
+         (mul8bit(r, 31)    << 10) |
+         (mul8bit(g, 31)    <<  5) |
+         (mul8bit(b, 31)         );
+}
+
+static inline unsigned char
+pack_r3g3b2(int r, int g, int b)
+{
+  return (mul8bit(r, 7) << 5) |
+         (mul8bit(g, 7) << 2) |
+         (mul8bit(b, 3)     );
+}
+
+static inline unsigned int
+pack_rgb10a2 (int r, int g, int b, int a)
+{
+  return ((unsigned int)((a >> 6) & 0x003) << 30) |
+         ((unsigned int)((b << 2) & 0x3ff) << 20) |
+         ((unsigned int)((g << 2) & 0x3ff) << 10) |
+         ((unsigned int)((r << 2) & 0x3ff)      );
+}
+
+#endif /* __COLOR_H__ */