From 93a458840c77b784fb74738f734ba2c5d22ca7a7 Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Wed, 6 Aug 2003 18:12:22 +0000
Subject: Shared dri driver resources

---
 src/mesa/drivers/dri/common/depthtmp.h | 176 +++++++++++++++++++++++++++++++++
 1 file changed, 176 insertions(+)
 create mode 100644 src/mesa/drivers/dri/common/depthtmp.h

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

diff --git a/src/mesa/drivers/dri/common/depthtmp.h b/src/mesa/drivers/dri/common/depthtmp.h
new file mode 100644
index 0000000000..f3da61e519
--- /dev/null
+++ b/src/mesa/drivers/dri/common/depthtmp.h
@@ -0,0 +1,176 @@
+/* $XFree86: xc/lib/GL/mesa/src/drv/common/depthtmp.h,v 1.5 2001/03/21 16:14:20 dawes Exp $ */
+
+#ifndef DBG
+#define DBG 0
+#endif
+
+
+#ifndef HAVE_HW_DEPTH_SPANS
+#define HAVE_HW_DEPTH_SPANS 0
+#endif
+#ifndef HAVE_HW_DEPTH_PIXELS
+#define HAVE_HW_DEPTH_PIXELS 0
+#endif
+
+#ifndef HW_READ_LOCK
+#define HW_READ_LOCK()		HW_LOCK()
+#endif
+#ifndef HW_READ_UNLOCK
+#define HW_READ_UNLOCK()	HW_UNLOCK()
+#endif
+
+static void TAG(WriteDepthSpan)( GLcontext *ctx,
+                             GLuint n, GLint x, GLint y,
+				 const GLdepth *depth,
+				 const GLubyte mask[] )
+{
+   HW_WRITE_LOCK()
+      {
+	 GLint x1;
+	 GLint n1;
+	 LOCAL_DEPTH_VARS;
+
+	 y = Y_FLIP( y );
+
+#if HAVE_HW_DEPTH_SPANS
+	 (void) x1; (void) n1;
+
+	 if ( DBG ) fprintf( stderr, "WriteDepthSpan 0..%d (x1 %d)\n",
+			     (int)n, (int)x );
+
+	 WRITE_DEPTH_SPAN();
+#else
+	 HW_CLIPLOOP()
+	    {
+	       GLint i = 0;
+	       CLIPSPAN( x, y, n, x1, n1, i );
+
+	       if ( DBG ) fprintf( stderr, "WriteDepthSpan %d..%d (x1 %d)\n",
+				   (int)i, (int)n1, (int)x1 );
+
+	       if ( mask ) {
+		  for ( ; i < n1 ; i++, x1++ ) {
+		     if ( mask[i] ) WRITE_DEPTH( x1, y, depth[i] );
+		  }
+	       } else {
+		  for ( ; i < n1 ; i++, x1++ ) {
+		     WRITE_DEPTH( x1, y, depth[i] );
+		  }
+	       }
+	    }
+	 HW_ENDCLIPLOOP();
+#endif
+      }
+   HW_WRITE_UNLOCK();
+}
+
+static void TAG(WriteDepthPixels)( GLcontext *ctx,
+				   GLuint n,
+				   const GLint x[],
+				   const GLint y[],
+				   const GLdepth depth[],
+				   const GLubyte mask[] )
+{
+   HW_WRITE_LOCK()
+      {
+	 GLint i;
+	 LOCAL_DEPTH_VARS;
+
+	 if ( DBG ) fprintf( stderr, "WriteDepthPixels\n" );
+
+#if HAVE_HW_DEPTH_PIXELS
+	 (void) i;
+
+	 WRITE_DEPTH_PIXELS();
+#else
+	 HW_CLIPLOOP()
+	    {
+	       for ( i = 0 ; i < n ; i++ ) {
+		  if ( mask[i] ) {
+		     const int fy = Y_FLIP( y[i] );
+		     if ( CLIPPIXEL( x[i], fy ) )
+			WRITE_DEPTH( x[i], fy, depth[i] );
+		  }
+	       }
+	    }
+	 HW_ENDCLIPLOOP();
+#endif
+      }
+   HW_WRITE_UNLOCK();
+}
+
+
+/* Read depth spans and pixels
+ */
+static void TAG(ReadDepthSpan)( GLcontext *ctx,
+				GLuint n, GLint x, GLint y,
+				GLdepth depth[] )
+{
+   HW_READ_LOCK()
+      {
+	 GLint x1, n1;
+	 LOCAL_DEPTH_VARS;
+
+	 y = Y_FLIP( y );
+
+	 if ( DBG ) fprintf( stderr, "ReadDepthSpan\n" );
+
+#if HAVE_HW_DEPTH_SPANS
+	 (void) x1; (void) n1;
+
+	 READ_DEPTH_SPAN();
+#else
+	 HW_CLIPLOOP()
+	    {
+	       GLint i = 0;
+	       CLIPSPAN( x, y, n, x1, n1, i );
+	       for ( ; i < n1 ; i++ )
+		  READ_DEPTH( depth[i], (x1+i), y );
+	    }
+	 HW_ENDCLIPLOOP();
+#endif
+      }
+   HW_READ_UNLOCK();
+}
+
+static void TAG(ReadDepthPixels)( GLcontext *ctx, GLuint n,
+				  const GLint x[], const GLint y[],
+				  GLdepth depth[] )
+{
+   HW_READ_LOCK()
+      {
+	 GLint i;
+	 LOCAL_DEPTH_VARS;
+
+	 if ( DBG ) fprintf( stderr, "ReadDepthPixels\n" );
+
+#if HAVE_HW_DEPTH_PIXELS
+	 (void) i;
+
+	 READ_DEPTH_PIXELS();
+#else
+	 HW_CLIPLOOP()
+	    {
+	       for ( i = 0 ; i < n ;i++ ) {
+		  int fy = Y_FLIP( y[i] );
+		  if ( CLIPPIXEL( x[i], fy ) )
+		     READ_DEPTH( depth[i], x[i], fy );
+	       }
+	    }
+	 HW_ENDCLIPLOOP();
+#endif
+      }
+   HW_READ_UNLOCK();
+}
+
+
+#if HAVE_HW_DEPTH_SPANS
+#undef WRITE_DEPTH_SPAN
+#undef WRITE_DEPTH_PIXELS
+#undef READ_DEPTH_SPAN
+#undef READ_DEPTH_PIXELS
+#else
+#undef WRITE_DEPTH
+#undef READ_DEPTH
+#endif
+#undef TAG
-- 
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