st_atom_constbuf.c revision f637a96e85a51a66f2c53b91118a6815bb61d6e6 
1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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  * Authors:
29  *   Keith Whitwell <keith@tungstengraphics.com>
30  *   Brian Paul
31  */
32
33#include "main/imports.h"
34#include "shader/prog_parameter.h"
35#include "shader/prog_print.h"
36
37#include "pipe/p_context.h"
38#include "pipe/p_defines.h"
39#include "pipe/p_inlines.h"
40
41#include "st_context.h"
42#include "st_atom.h"
43#include "st_atom_constbuf.h"
44#include "st_program.h"
45
46
47/**
48 * Pass the given program parameters to the graphics pipe as a
49 * constant buffer.
50 * \param id  either PIPE_SHADER_VERTEX or PIPE_SHADER_FRAGMENT
51 */
52void st_upload_constants( struct st_context *st,
53                          struct gl_program_parameter_list *params,
54                          unsigned id)
55{
56   struct pipe_context *pipe = st->pipe;
57   struct pipe_constant_buffer *cbuf = &st->state.constants[id];
58
59   assert(id == PIPE_SHADER_VERTEX || id == PIPE_SHADER_FRAGMENT);
60
61   /* update constants */
62   if (params && params->NumParameters) {
63      const uint paramBytes = params->NumParameters * sizeof(GLfloat) * 4;
64
65      /* Update our own dependency flags.  This works because this
66       * function will also be called whenever the program changes.
67       */
68      st->constants.tracked_state[id].dirty.mesa =
69         (params->StateFlags | _NEW_PROGRAM);
70
71      _mesa_load_state_parameters(st->ctx, params);
72
73      /* We always need to get a new buffer, to keep the drivers simple and
74       * avoid gratuitous rendering synchronization.
75       */
76      pipe_buffer_reference(pipe->screen, &cbuf->buffer, NULL );
77      cbuf->buffer = pipe_buffer_create(pipe->screen, 16, PIPE_BUFFER_USAGE_CONSTANT,
78					paramBytes );
79
80      if (0)
81      {
82	 printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n",
83                __FUNCTION__, id, params->NumParameters, params->StateFlags);
84         _mesa_print_parameter_list(params);
85      }
86
87      /* load Mesa constants into the constant buffer */
88      if (cbuf->buffer) {
89         void *map = pipe_buffer_map(pipe->screen, cbuf->buffer,
90                                     PIPE_BUFFER_USAGE_CPU_WRITE);
91         memcpy(map, params->ParameterValues, paramBytes);
92         pipe_buffer_unmap(pipe->screen, cbuf->buffer);
93      }
94
95      cbuf->size = paramBytes;
96
97      st->pipe->set_constant_buffer(st->pipe, id, 0, cbuf);
98   }
99   else {
100      st->constants.tracked_state[id].dirty.mesa = 0;
101      //  st->pipe->set_constant_buffer(st->pipe, id, 0, NULL);
102   }
103}
104
105/* Vertex shader:
106 */
107static void update_vs_constants(struct st_context *st )
108{
109   struct st_vertex_program *vp = st->vp;
110   struct gl_program_parameter_list *params = vp->Base.Base.Parameters;
111
112   st_upload_constants( st, params, PIPE_SHADER_VERTEX );
113}
114
115const struct st_tracked_state st_update_vs_constants = {
116   "st_update_vs_constants",				/* name */
117   {							/* dirty */
118      0,  /* set dynamically above */			/* mesa */
119      ST_NEW_VERTEX_PROGRAM,				/* st */
120   },
121   update_vs_constants					/* update */
122};
123
124/* Fragment shader:
125 */
126static void update_fs_constants(struct st_context *st )
127{
128   struct st_fragment_program *fp = st->fp;
129   struct gl_program_parameter_list *params = fp->Base.Base.Parameters;
130
131   st_upload_constants( st, params, PIPE_SHADER_FRAGMENT );
132}
133
134const struct st_tracked_state st_update_fs_constants = {
135   "st_update_fs_constants",				/* name */
136   {							/* dirty */
137      0,  /* set dynamically above */			/* mesa */
138      ST_NEW_FRAGMENT_PROGRAM,				/* st */
139   },
140   update_fs_constants					/* update */
141};
142
143