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/*
29 * Authors:
30 *   Keith Whitwell <keith@tungstengraphics.com>
31 *   Brian Paul
32 */
33
34#include "main/imports.h"
35#include "program/prog_parameter.h"
36#include "program/prog_print.h"
37
38#include "pipe/p_context.h"
39#include "pipe/p_defines.h"
40#include "util/u_inlines.h"
41#include "util/u_upload_mgr.h"
42
43#include "st_debug.h"
44#include "st_context.h"
45#include "st_atom.h"
46#include "st_atom_constbuf.h"
47#include "st_program.h"
48
49
50/**
51 * Pass the given program parameters to the graphics pipe as a
52 * constant buffer.
53 * \param shader_type  either PIPE_SHADER_VERTEX or PIPE_SHADER_FRAGMENT
54 */
55void st_upload_constants( struct st_context *st,
56                          struct gl_program_parameter_list *params,
57                          unsigned shader_type)
58{
59   assert(shader_type == PIPE_SHADER_VERTEX ||
60          shader_type == PIPE_SHADER_FRAGMENT ||
61          shader_type == PIPE_SHADER_GEOMETRY);
62
63   /* update constants */
64   if (params && params->NumParameters) {
65      struct pipe_constant_buffer cb;
66      const uint paramBytes = params->NumParameters * sizeof(GLfloat) * 4;
67
68      /* Update the constants which come from fixed-function state, such as
69       * transformation matrices, fog factors, etc.  The rest of the values in
70       * the parameters list are explicitly set by the user with glUniform,
71       * glProgramParameter(), etc.
72       */
73      _mesa_load_state_parameters(st->ctx, params);
74
75      /* We always need to get a new buffer, to keep the drivers simple and
76       * avoid gratuitous rendering synchronization.
77       * Let's use a user buffer to avoid an unnecessary copy.
78       */
79      if (st->constbuf_uploader) {
80         cb.buffer = NULL;
81         cb.user_buffer = NULL;
82         u_upload_data(st->constbuf_uploader, 0, paramBytes,
83                       params->ParameterValues, &cb.buffer_offset, &cb.buffer);
84         u_upload_unmap(st->constbuf_uploader);
85      } else {
86         cb.buffer = NULL;
87         cb.user_buffer = params->ParameterValues;
88         cb.buffer_offset = 0;
89      }
90      cb.buffer_size = paramBytes;
91
92      if (ST_DEBUG & DEBUG_CONSTANTS) {
93         debug_printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n",
94                      __FUNCTION__, shader_type, params->NumParameters,
95                      params->StateFlags);
96         _mesa_print_parameter_list(params);
97      }
98
99      st->pipe->set_constant_buffer(st->pipe, shader_type, 0, &cb);
100      pipe_resource_reference(&cb.buffer, NULL);
101
102      st->state.constants[shader_type].ptr = params->ParameterValues;
103      st->state.constants[shader_type].size = paramBytes;
104   }
105   else if (st->state.constants[shader_type].ptr) {
106      st->state.constants[shader_type].ptr = NULL;
107      st->state.constants[shader_type].size = 0;
108      st->pipe->set_constant_buffer(st->pipe, shader_type, 0, NULL);
109   }
110}
111
112
113/**
114 * Vertex shader:
115 */
116static void update_vs_constants(struct st_context *st )
117{
118   struct st_vertex_program *vp = st->vp;
119   struct gl_program_parameter_list *params = vp->Base.Base.Parameters;
120
121   st_upload_constants( st, params, PIPE_SHADER_VERTEX );
122}
123
124
125const struct st_tracked_state st_update_vs_constants = {
126   "st_update_vs_constants",				/* name */
127   {							/* dirty */
128      (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
129      ST_NEW_VERTEX_PROGRAM,				/* st */
130   },
131   update_vs_constants					/* update */
132};
133
134
135
136/**
137 * Fragment shader:
138 */
139static void update_fs_constants(struct st_context *st )
140{
141   struct st_fragment_program *fp = st->fp;
142   struct gl_program_parameter_list *params = fp->Base.Base.Parameters;
143
144   st_upload_constants( st, params, PIPE_SHADER_FRAGMENT );
145}
146
147
148const struct st_tracked_state st_update_fs_constants = {
149   "st_update_fs_constants",				/* name */
150   {							/* dirty */
151      (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
152      ST_NEW_FRAGMENT_PROGRAM,				/* st */
153   },
154   update_fs_constants					/* update */
155};
156
157/* Geometry shader:
158 */
159static void update_gs_constants(struct st_context *st )
160{
161   struct st_geometry_program *gp = st->gp;
162   struct gl_program_parameter_list *params;
163
164   if (gp) {
165      params = gp->Base.Base.Parameters;
166      st_upload_constants( st, params, PIPE_SHADER_GEOMETRY );
167   }
168}
169
170const struct st_tracked_state st_update_gs_constants = {
171   "st_update_gs_constants",				/* name */
172   {							/* dirty */
173      (_NEW_PROGRAM | _NEW_PROGRAM_CONSTANTS),          /* mesa */
174      ST_NEW_GEOMETRY_PROGRAM,				/* st */
175   },
176   update_gs_constants					/* update */
177};
178