1 files changed, 132 insertions, 0 deletions
diff --git a/mi/mispans.h b/mi/mispans.h
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+++ b/mi/mispans.h
@@ -0,0 +1,132 @@
+/***********************************************************
+
+Copyright 1989, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1989 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+
+/* $Xorg: mispans.h,v 1.4 2001/02/09 02:05:21 xorgcvs Exp $ */
+
+typedef struct {
+    int         count;		/* number of spans		    */
+    DDXPointPtr points;		/* pointer to list of start points  */
+    int         *widths;	/* pointer to list of widths	    */
+} Spans;
+
+typedef struct {
+    int		size;		/* Total number of *Spans allocated	*/
+    int		count;		/* Number of *Spans actually in group   */
+    Spans       *group;		/* List of Spans			*/
+    int		ymin, ymax;	/* Min, max y values encountered	*/
+} SpanGroup;
+
+/* Initialize SpanGroup.  MUST BE DONE before use. */
+extern void miInitSpanGroup(
+#if NeedFunctionPrototypes
+    SpanGroup * /*spanGroup*/
+#endif
+);
+
+/* Add a Spans to a SpanGroup. The spans MUST BE in y-sorted order */
+extern void miAppendSpans(
+#if NeedFunctionPrototypes
+    SpanGroup * /*spanGroup*/,
+    SpanGroup * /*otherGroup*/,
+    Spans * /*spans*/
+#endif
+);
+
+/* Paint a span group, possibly with some overlap */
+extern void miFillSpanGroup(
+#if NeedFunctionPrototypes
+    DrawablePtr /*pDraw*/,
+    GCPtr /*pGC*/,
+    SpanGroup * /*spanGroup*/
+#endif
+);
+
+/* Paint a span group, insuring that each pixel is painted at most once */
+extern void miFillUniqueSpanGroup(
+#if NeedFunctionPrototypes
+    DrawablePtr /*pDraw*/,
+    GCPtr /*pGC*/,
+    SpanGroup * /*spanGroup*/
+#endif
+);
+
+/* Free up data in a span group.  MUST BE DONE or you'll suffer memory leaks */
+extern void miFreeSpanGroup(
+#if NeedFunctionPrototypes
+    SpanGroup * /*spanGroup*/
+#endif
+);
+
+extern void miSubtractSpans(
+#if NeedFunctionPrototypes
+    SpanGroup * /*spanGroup*/,
+    Spans * /*sub*/
+#endif
+);
+
+extern void miDisposeSpanGroup(
+#if NeedFunctionPrototypes
+    SpanGroup * /*spanGroup*/
+#endif
+);
+
+extern int miClipSpans(
+#if NeedFunctionPrototypes
+    RegionPtr /*prgnDst*/,
+    DDXPointPtr /*ppt*/,
+    int * /*pwidth*/,
+    int /*nspans*/,
+    DDXPointPtr /*pptNew*/,
+    int * /*pwidthNew*/,
+    int /*fSorted*/
+#endif
+);
+
+/* Rops which must use span groups */
+#define miSpansCarefulRop(rop)	(((rop) & 0xc) == 0x8 || ((rop) & 0x3) == 0x2)
+#define miSpansEasyRop(rop)	(!miSpansCarefulRop(rop))
+