1 files changed, 92 insertions, 0 deletions
diff --git a/src/mesa/pipe/softpipe/g_tile_output.c b/src/mesa/pipe/softpipe/g_tile_output.c
new file mode 100644
index 0000000000..058ca30193
--- /dev/null
+++ b/src/mesa/pipe/softpipe/g_tile_output.c
@@ -0,0 +1,92 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5
+ *
+ * Copyright (C) 1999-2005  Brian Paul   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
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 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
+ * BRIAN PAUL 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.
+ */
+
+/* Vertices are just an array of floats, with all the attributes
+ * packed.  We currently assume a layout like:
+ *
+ * attr[0][0..3] - window position
+ * attr[1..n][0..3] - remaining attributes.
+ *
+ * Attributes are assumed to be 4 floats wide but are packed so that
+ * all the enabled attributes run contiguously.
+ */
+
+#include "glheader.h"
+#include "g_context.h"
+#include "g_headers.h"
+#include "g_surface.h"
+#include "g_tile.h"
+
+
+static void mask_copy( GLfloat (*dest)[4],
+		       GLfloat (*src)[4],
+		       GLuint mask )
+{
+   GLuint i, j;
+
+   for (i = 0; i < 4; i++) {
+      if (mask & (1<<i)) {
+	 for (j = 0; j < 4; j++) {
+	    dest[j][i] = src[j][i];
+	 }
+      }
+   }
+}
+
+
+/* Write to the output, taking mask into account.
+ *
+ * Note that surfaces support only full quad reads and writes.
+ */
+void quad_output( struct generic_context *generic,
+		  struct quad_header *quad )
+{
+
+   if (quad->mask != MASK_ALL) 
+   {
+      GLfloat tmp[4][QUAD_SIZE];
+
+      /* Yes, we'll probably have a masked write as well, but this is
+       * how blend will be done at least.
+       */
+      gs_read_quad_f_swz( generic->cbuf_surface, 
+			   quad->x0,
+			   quad->y0,
+			   tmp );
+   
+      mask_copy( tmp, quad->outputs.color, quad->mask );
+
+      gs_write_quad_f_swz( generic->cbuf_surface, 
+			   quad->x0,
+			   quad->y0,
+			   tmp );
+   }
+   else 
+   {
+      gs_write_quad_f_swz( generic->cbuf_surface, 
+			   quad->x0,
+			   quad->y0,
+			   quad->outputs.color );
+   }
+}