Import Ghostscript 9.50ghostscript-9.50

Signed-off-by: Thomas Deutschmann <whissi@gentoo.org>

1 files changed, 72 insertions, 0 deletions

diff --git a/devices/gdev8bcm.h b/devices/gdev8bcm.h
new file mode 100644
index 00000000..cc7b98ce
--- /dev/null
+++ b/devices/gdev8bcm.h
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+/* Copyright (C) 2001-2019 Artifex Software, Inc.
+   All Rights Reserved.
+
+   This software is provided AS-IS with no warranty, either express or
+   implied.
+
+   This software is distributed under license and may not be copied,
+   modified or distributed except as expressly authorized under the terms
+   of the license contained in the file LICENSE in this distribution.
+
+   Refer to licensing information at http://www.artifex.com or contact
+   Artifex Software, Inc.,  1305 Grant Avenue - Suite 200, Novato,
+   CA 94945, U.S.A., +1(415)492-9861, for further information.
+*/
+
+/* 8-bit color map support */
+/* Requires gxdevice.h (for gx_color_value) */
+
+#ifndef gdev8bcm_INCLUDED
+#  define gdev8bcm_INCLUDED
+
+#include "stdpre.h"
+#include "gxcvalue.h"
+
+/*
+ * The MS-DOS, MS Windows, and X Windows drivers all use (at least on
+ * some platforms) an 8-bit color map in which some fraction is reserved
+ * for a pre-allocated cube and some or all of the remainder is
+ * allocated dynamically.  Since looking up colors in this map can be
+ * a major performance bottleneck, we provide an efficient implementation
+ * that can be shared among drivers.
+ *
+ * As a performance compromise, we only look up the top 5 bits of the
+ * RGB value in the color map.  This compromises color quality very little,
+ * and allows substantial optimizations.
+ */
+
+#define gx_8bit_map_size 323
+#define gx_8bit_map_spreader 123	/* approx. 323 - (1.618 * 323) */
+typedef struct gx_8bit_map_entry_s {
+    ushort rgb;			/* key = 0rrrrrgggggbbbbb */
+#define gx_8bit_no_rgb ((ushort)0xffff)
+#define gx_8bit_rgb_key(r, g, b)\
+  (((r >> (gx_color_value_bits - 5)) << 10) +\
+   ((g >> (gx_color_value_bits - 5)) << 5) +\
+   (b >> (gx_color_value_bits - 5)))
+    short index;		/* value */
+} gx_8bit_map_entry;
+typedef struct gx_8bit_color_map_s {
+    int count;			/* # of occupied entries */
+    int max_count;		/* max # of occupied entries */
+    gx_8bit_map_entry map[gx_8bit_map_size + 1];
+} gx_8bit_color_map;
+
+/* Initialize an 8-bit color map. */
+void gx_8bit_map_init(gx_8bit_color_map *, int);
+
+/* Look up a color in an 8-bit color map. */
+/* Return -1 if not found. */
+int gx_8bit_map_rgb_color(const gx_8bit_color_map *, gx_color_value,
+                          gx_color_value, gx_color_value);
+
+/* Test whether an 8-bit color map has room for more entries. */
+#define gx_8bit_map_is_full(pcm)\
+  ((pcm)->count == (pcm)->max_count)
+
+/* Add a color to an 8-bit color map. */
+/* Return -1 if the map is full. */
+int gx_8bit_add_rgb_color(gx_8bit_color_map *, gx_color_value,
+                          gx_color_value, gx_color_value);
+
+#endif /* gdev8bcm_INCLUDED */