st/mesa: add support for get sample position

This just calls into the gallium interface.

Reviewed-by: Marek Olšák <maraeo@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/mesa/sources.mak

@@ -224,6 +224,7 @@ STATETRACKER_FILES = \
 	$(SRCDIR)state_tracker/st_cb_eglimage.c \
 	$(SRCDIR)state_tracker/st_cb_fbo.c \
 	$(SRCDIR)state_tracker/st_cb_feedback.c \
+	$(SRCDIR)state_tracker/st_cb_msaa.c \
 	$(SRCDIR)state_tracker/st_cb_program.c \
 	$(SRCDIR)state_tracker/st_cb_queryobj.c \
 	$(SRCDIR)state_tracker/st_cb_rasterpos.c \

src/mesa/state_tracker/st_cb_msaa.c

@@ -0,0 +1,54 @@
+/**************************************************************************
+ * 
+ * Copyright 2013 Red Hat
+ * 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 THE AUTHORS 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.
+ * 
+ **************************************************************************/
+
+#include "main/mfeatures.h"
+#include "main/bufferobj.h"
+#include "main/imports.h"
+
+#include "state_tracker/st_cb_msaa.h"
+#include "state_tracker/st_context.h"
+#include "state_tracker/st_atom.h"
+#include "state_tracker/st_cb_fbo.h"
+
+#include "pipe/p_context.h"
+static void st_GetSamplePosition(struct gl_context *ctx,
+                                 struct gl_framebuffer *fb,
+                                 GLuint index,
+                                 GLfloat *outValue)
+{
+   struct st_context *st = st_context(ctx);
+ 
+   st_validate_state(st);
+
+   if (st->pipe->get_sample_position)
+      st->pipe->get_sample_position(st->pipe, (unsigned)fb->Visual.samples, index, outValue);
+}
+
+void st_init_msaa_functions(struct dd_function_table *functions)
+{
+   functions->GetSamplePosition = st_GetSamplePosition;
+}

src/mesa/state_tracker/st_cb_msaa.h

@@ -0,0 +1,39 @@
+/**************************************************************************
+ * 
+ * Copyright 2013 Red Hat
+ * 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 THE AUTHORS 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 ST_CB_MSAA_H
+#define ST_CB_MSAA_H
+
+#include "main/glheader.h"
+
+struct dd_function_table;
+
+extern void
+st_init_msaa_functions(struct dd_function_table *functions);
+
+#endif

src/mesa/state_tracker/st_context.c

@@ -49,6 +49,7 @@
 #include "st_cb_eglimage.h"
 #include "st_cb_fbo.h"
 #include "st_cb_feedback.h"
+#include "st_cb_msaa.h"
 #include "st_cb_program.h"
 #include "st_cb_queryobj.h"
 #include "st_cb_readpixels.h"
@@ -340,6 +341,7 @@ void st_init_driver_functions(struct dd_function_table *functions)
 
    st_init_fbo_functions(functions);
    st_init_feedback_functions(functions);
+   st_init_msaa_functions(functions);
    st_init_program_functions(functions);
    st_init_query_functions(functions);
    st_init_cond_render_functions(functions);