gallium/util: new polygon stipple utility helper

The polygon stipple fallback does not have to be implemented in the
draw module (it doesn't need window coords, etc).  Drivers can use
this utility and avoid sw vertex fallbacks if pstipple is enabled.
Note: this is WIP and not used by any driver yet.

1 files changed, 56 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_pstipple.h b/src/gallium/auxiliary/util/u_pstipple.h
new file mode 100644
index 00000000000..1c2f5f48af4
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_pstipple.h
@@ -0,0 +1,56 @@
+/**************************************************************************
+ * 
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * Copyright 2010 VMware, Inc.
+ * 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, 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 TUNGSTEN GRAPHICS AND/OR ITS 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.
+ * 
+ **************************************************************************/
+
+#ifndef U_PSTIPPLE_H
+#define U_PSTIPPLE_H
+
+#include "pipe/p_compiler.h"
+
+struct pipe_context;
+struct pipe_resource;
+struct pipe_shader_state;
+
+
+extern struct pipe_resource *
+util_pstipple_create_stipple_texture(struct pipe_context *pipe,
+                                     const uint32_t pattern[32]);
+
+extern struct pipe_sampler_view *
+util_pstipple_create_sampler_view(struct pipe_context *pipe,
+                                  struct pipe_resource *tex);
+
+extern void *
+util_pstipple_create_sampler(struct pipe_context *pipe);
+
+extern struct pipe_shader_state *
+util_pstipple_create_fragment_shader(struct pipe_context *pipe,
+                                     struct pipe_shader_state *fs,
+                                     unsigned *samplerUnitOut);
+
+
+#endif