From 2702c90d7a39fca2a3319c5e915fd290cb31fc70 Mon Sep 17 00:00:00 2001
From: Radosław Kujawa <radoslaw.kujawa@c0ff33.net>
Date: Fri, 17 Jul 2026 14:54:32 +0200
Subject: Initial import.

---
 src/mesa/drivers/dri/common/stenciltmp.h | 147 +++++++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 src/mesa/drivers/dri/common/stenciltmp.h

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

diff --git a/src/mesa/drivers/dri/common/stenciltmp.h b/src/mesa/drivers/dri/common/stenciltmp.h
new file mode 100644
index 0000000..365e981
--- /dev/null
+++ b/src/mesa/drivers/dri/common/stenciltmp.h
@@ -0,0 +1,147 @@
+/* $XFree86: xc/lib/GL/mesa/src/drv/common/stenciltmp.h,v 1.3 2001/03/21 16:14:20 dawes Exp $ */
+
+#ifndef DBG
+#define DBG 0
+#endif
+
+#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
+
+static void TAG(WriteStencilSpan)( GLcontext *ctx,
+				   GLuint n, GLint x, GLint y,
+				   const GLstencil *stencil, 
+				   const GLubyte mask[] )
+{
+   HW_WRITE_LOCK()
+      {
+	 GLint x1;
+	 GLint n1;
+	 LOCAL_STENCIL_VARS;
+
+	 y = Y_FLIP(y);
+
+	 HW_CLIPLOOP() 
+	    {
+	       GLint i = 0;
+	       CLIPSPAN(x,y,n,x1,n1,i);
+
+	       if (DBG) fprintf(stderr, "WriteStencilSpan %d..%d (x1 %d)\n",
+				(int)i, (int)n1, (int)x1);
+
+	       if (mask)
+	       {
+		  for (;i<n1;i++,x1++)
+		     if (mask[i])
+			WRITE_STENCIL( x1, y, stencil[i] );
+	       }
+	       else
+	       {
+		  for (;i<n1;i++,x1++)
+		     WRITE_STENCIL( x1, y, stencil[i] );
+	       }
+	    }
+	 HW_ENDCLIPLOOP();
+      }
+   HW_WRITE_UNLOCK();
+}
+
+
+static void TAG(WriteStencilPixels)( GLcontext *ctx,
+				     GLuint n, 
+				     const GLint x[], 
+				     const GLint y[],
+				     const GLstencil stencil[], 
+				     const GLubyte mask[] )
+{
+   HW_WRITE_LOCK()
+      {
+	 GLint i;
+	 LOCAL_STENCIL_VARS;
+
+	 if (DBG) fprintf(stderr, "WriteStencilPixels\n");
+
+	 HW_CLIPLOOP()
+	    {
+	       for (i=0;i<n;i++)
+	       {
+		  if (mask[i]) {
+		     const int fy = Y_FLIP(y[i]);
+		     if (CLIPPIXEL(x[i],fy))
+			WRITE_STENCIL( x[i], fy, stencil[i] );
+		  }
+	       }
+	    }
+	 HW_ENDCLIPLOOP();
+      }
+   HW_WRITE_UNLOCK();
+}
+
+
+/* Read stencil spans and pixels
+ */
+static void TAG(ReadStencilSpan)( GLcontext *ctx,
+				  GLuint n, GLint x, GLint y,
+				  GLstencil stencil[])
+{
+   HW_READ_LOCK()
+      {
+	 GLint x1,n1;
+	 LOCAL_STENCIL_VARS;
+
+	 y = Y_FLIP(y);
+
+	 if (DBG) fprintf(stderr, "ReadStencilSpan\n");
+
+	 HW_CLIPLOOP() 
+	    {
+	       GLint i = 0;
+	       CLIPSPAN(x,y,n,x1,n1,i);
+	       for (;i<n1;i++)
+		  READ_STENCIL( stencil[i], (x1+i), y );
+	    }
+	 HW_ENDCLIPLOOP();
+      }
+   HW_READ_UNLOCK();
+}
+
+static void TAG(ReadStencilPixels)( GLcontext *ctx, GLuint n, 
+				    const GLint x[], const GLint y[],
+				    GLstencil stencil[] )
+{
+   HW_READ_LOCK()
+      {
+	 GLint i;
+	 LOCAL_STENCIL_VARS;
+
+	 if (DBG) fprintf(stderr, "ReadStencilPixels\n");
+ 
+	 HW_CLIPLOOP()
+	    {
+	       for (i=0;i<n;i++) {
+		  int fy = Y_FLIP( y[i] );
+		  if (CLIPPIXEL( x[i], fy ))
+		     READ_STENCIL( stencil[i], x[i], fy );
+	       }
+	    }
+	 HW_ENDCLIPLOOP();
+      }
+   HW_READ_UNLOCK();
+}
+
+
+
+
+#undef WRITE_STENCIL
+#undef READ_STENCIL
+#undef TAG
-- 
cgit