From cf5b2f7419b28cdd533c60e205d5a90d96e85c8e Mon Sep 17 00:00:00 2001
From: Roland Scheidegger <rscheidegger@gmx.ch>
Date: Fri, 1 Jul 2005 00:08:46 +0000
Subject: remove common macros used in the span functions of most drivers from
 the individual drivers and put them in common code. It is still possible for
 a driver to define its own macros if it has special needs. This affects
 CLIPPIXEL, CLIPSPAN, HW_CLIPLOOP, HW_ENDCLIPLOOP, and for drivers using the
 spantmp2 template also GET_SRC_PTR and GET_DST_PTR.

---
 src/mesa/drivers/dri/common/spantmp_common.h | 81 ++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 src/mesa/drivers/dri/common/spantmp_common.h

(limited to 'src/mesa/drivers/dri/common/spantmp_common.h')

diff --git a/src/mesa/drivers/dri/common/spantmp_common.h b/src/mesa/drivers/dri/common/spantmp_common.h
new file mode 100644
index 0000000000..a4509a569d
--- /dev/null
+++ b/src/mesa/drivers/dri/common/spantmp_common.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2000-2001 VA Linux Systems, Inc.
+ * (C) Copyright IBM Corporation 2004
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) 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 NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS 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.
+ */
+
+/**
+ * \file spantmp_common.h
+ *
+ * common macros for span read / write functions to be used in the depth,
+ * stencil and pixel span templates.
+ */
+
+#ifndef HW_WRITE_LOCK
+#define HW_WRITE_LOCK()		HW_LOCK()
+#endif
+
+#ifndef HW_WRITE_UNLOCK
+#define HW_WRITE_UNLOCK()	HW_UNLOCK()
+#endif
+
+#ifndef HW_READ_LOCK
+#define HW_READ_LOCK()		HW_LOCK()
+#endif
+
+#ifndef HW_READ_UNLOCK
+#define HW_READ_UNLOCK()	HW_UNLOCK()
+#endif
+
+#ifndef HW_CLIPLOOP
+#define HW_CLIPLOOP()							\
+   do {									\
+      int _nc = dPriv->numClipRects;					\
+      while ( _nc-- ) {							\
+	 int minx = dPriv->pClipRects[_nc].x1 - dPriv->x;		\
+	 int miny = dPriv->pClipRects[_nc].y1 - dPriv->y;		\
+	 int maxx = dPriv->pClipRects[_nc].x2 - dPriv->x;		\
+	 int maxy = dPriv->pClipRects[_nc].y2 - dPriv->y;
+#endif
+
+#ifndef HW_ENDCLIPLOOP
+#define HW_ENDCLIPLOOP()						\
+      }									\
+   } while (0)
+#endif
+
+#ifndef CLIPPIXEL
+#define CLIPPIXEL( _x, _y )						\
+   ((_x >= minx) && (_x < maxx) && (_y >= miny) && (_y < maxy))
+#endif
+
+#ifndef CLIPSPAN
+#define CLIPSPAN( _x, _y, _n, _x1, _n1, _i )				\
+   if ( _y < miny || _y >= maxy /*|| _x + n < minx || _x >=maxx*/ ) {	\
+      _n1 = 0, _x1 = x;							\
+   } else {								\
+      _n1 = _n;								\
+      _x1 = _x;								\
+      if ( _x1 < minx ) _i += (minx-_x1), n1 -= (minx-_x1), _x1 = minx; \
+      if ( _x1 + _n1 >= maxx ) n1 -= (_x1 + n1 - maxx);		        \
+   }
+#endif
-- 
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