Commit of build_consolidation branch

Squashed into one commit (see branch for details of the evolution of the
branch).

This brings gpcl6 and gxps into the Ghostscript build system, and a shared
set of graphics library object files for all the interpreters.

Also, brings the same configuration options to the pcl and xps products as we
have for Ghostscript.

1 files changed, 50 insertions, 0 deletions

diff --git a/base/gscompt.h b/base/gscompt.h
new file mode 100644
index 000000000..b69615aa0
--- /dev/null
+++ b/base/gscompt.h
@@ -0,0 +1,50 @@
+/* Copyright (C) 2001-2012 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.,  7 Mt. Lassen Drive - Suite A-134, San Rafael,
+   CA  94903, U.S.A., +1(415)492-9861, for further information.
+*/
+
+
+/* Abstract types for compositing objects */
+
+#ifndef gscompt_INCLUDED
+#  define gscompt_INCLUDED
+
+/*
+ * Compositing is the next-to-last step in the rendering pipeline.
+ * It occurs after color correction but before halftoning (if needed).
+ *
+ * gs_composite_t is the abstract superclass for compositing functions such
+ * as RasterOp functions or alpha-based compositing.  Concrete subclasses
+ * must provide a default implementation (presumably based on
+ * get_bits_rectangle and copy_color) for devices that provide no optimized
+ * implementation of their own.
+ *
+ * A client that wants to produce composited output asks the target device
+ * to create an appropriate compositing device based on the target device
+ * and the gs_composite_t (and possibly other elements of the imager state).
+ * If the target device doesn't have its own implementation for the
+ * requested function, format, and state, it passes the buck to the
+ * gs_composite_t, which may make further tests for special cases before
+ * creating and returning a compositing device that uses the default
+ * implementation.
+ */
+typedef struct gs_composite_s gs_composite_t;
+
+/*
+ * To enable fast cache lookup and equality testing, compositing functions,
+ * like halftones, black generation functions, etc., carry a unique ID (time
+ * stamp).
+ */
+gs_id gs_composite_id(const gs_composite_t * pcte);
+
+#endif /* gscompt_INCLUDED */