1 /**************************************************************************
2 *
3 * Copyright 2013 Red Hat
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 #include "main/bufferobj.h"
29 #include "main/imports.h"
30 #include "main/framebuffer.h"
31
32 #include "state_tracker/st_cb_msaa.h"
33 #include "state_tracker/st_context.h"
34 #include "state_tracker/st_atom.h"
35 #include "state_tracker/st_cb_fbo.h"
36
37 #include "pipe/p_context.h"
38
39
40 static void
st_GetSamplePosition(struct gl_context * ctx,struct gl_framebuffer * fb,GLuint index,GLfloat * outPos)41 st_GetSamplePosition(struct gl_context *ctx,
42 struct gl_framebuffer *fb,
43 GLuint index,
44 GLfloat *outPos)
45 {
46 struct st_context *st = st_context(ctx);
47
48 st_validate_state(st, ST_PIPELINE_RENDER);
49
50 if (st->pipe->get_sample_position)
51 st->pipe->get_sample_position(st->pipe,
52 _mesa_geometric_samples(fb),
53 index, outPos);
54 else
55 outPos[0] = outPos[1] = 0.5f;
56 }
57
58
59 void
st_init_msaa_functions(struct dd_function_table * functions)60 st_init_msaa_functions(struct dd_function_table *functions)
61 {
62 functions->GetSamplePosition = st_GetSamplePosition;
63 }
64