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 */
st_upload_constants(struct st_context * st,struct gl_program_parameter_list * params,unsigned shader_type)55 void 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 */
update_vs_constants(struct st_context * st)116 static 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
125 const 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 */
update_fs_constants(struct st_context * st)139 static 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
148 const 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 */
update_gs_constants(struct st_context * st)159 static 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
170 const 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