118 lines
4.1 KiB
C
118 lines
4.1 KiB
C
/* $XFree86: xc/programs/Xserver/mi/mispans.h,v 1.3 2001/12/14 20:00:26 dawes Exp $ */
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/***********************************************************
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Copyright 1989, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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Copyright 1989 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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/* $Xorg: mispans.h,v 1.4 2001/02/09 02:05:21 xorgcvs Exp $ */
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typedef struct {
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int count; /* number of spans */
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DDXPointPtr points; /* pointer to list of start points */
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int *widths; /* pointer to list of widths */
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} Spans;
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typedef struct {
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int size; /* Total number of *Spans allocated */
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int count; /* Number of *Spans actually in group */
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Spans *group; /* List of Spans */
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int ymin, ymax; /* Min, max y values encountered */
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} SpanGroup;
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/* Initialize SpanGroup. MUST BE DONE before use. */
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extern void miInitSpanGroup(
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SpanGroup * /*spanGroup*/
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);
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/* Add a Spans to a SpanGroup. The spans MUST BE in y-sorted order */
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extern void miAppendSpans(
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SpanGroup * /*spanGroup*/,
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SpanGroup * /*otherGroup*/,
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Spans * /*spans*/
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);
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/* Paint a span group, possibly with some overlap */
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extern void miFillSpanGroup(
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DrawablePtr /*pDraw*/,
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GCPtr /*pGC*/,
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SpanGroup * /*spanGroup*/
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);
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/* Paint a span group, insuring that each pixel is painted at most once */
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extern void miFillUniqueSpanGroup(
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DrawablePtr /*pDraw*/,
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GCPtr /*pGC*/,
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SpanGroup * /*spanGroup*/
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);
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/* Free up data in a span group. MUST BE DONE or you'll suffer memory leaks */
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extern void miFreeSpanGroup(
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SpanGroup * /*spanGroup*/
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);
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extern void miSubtractSpans(
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SpanGroup * /*spanGroup*/,
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Spans * /*sub*/
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);
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extern void miDisposeSpanGroup(
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SpanGroup * /*spanGroup*/
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);
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extern int miClipSpans(
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RegionPtr /*prgnDst*/,
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DDXPointPtr /*ppt*/,
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int * /*pwidth*/,
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int /*nspans*/,
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DDXPointPtr /*pptNew*/,
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int * /*pwidthNew*/,
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int /*fSorted*/
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);
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/* Rops which must use span groups */
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#define miSpansCarefulRop(rop) (((rop) & 0xc) == 0x8 || ((rop) & 0x3) == 0x2)
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#define miSpansEasyRop(rop) (!miSpansCarefulRop(rop))
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