1/**********************************************************
2 * Copyright 2008-2009 VMware, Inc.  All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26#include "util/u_inlines.h"
27#include "pipe/p_defines.h"
28#include "util/u_format.h"
29#include "util/u_math.h"
30#include "util/u_memory.h"
31#include "util/u_bitmask.h"
32#include "translate/translate.h"
33#include "tgsi/tgsi_ureg.h"
34
35#include "svga_context.h"
36#include "svga_state.h"
37#include "svga_cmd.h"
38#include "svga_tgsi.h"
39
40#include "svga_hw_reg.h"
41
42/***********************************************************************
43 */
44
45
46static INLINE int compare_vs_keys( const struct svga_vs_compile_key *a,
47                                   const struct svga_vs_compile_key *b )
48{
49   unsigned keysize = svga_vs_key_size( a );
50   return memcmp( a, b, keysize );
51}
52
53
54static struct svga_shader_result *search_vs_key( struct svga_vertex_shader *vs,
55                                                 const struct svga_vs_compile_key *key )
56{
57   struct svga_shader_result *result = vs->base.results;
58
59   assert(key);
60
61   for ( ; result; result = result->next) {
62      if (compare_vs_keys( key, &result->key.vkey ) == 0)
63         return result;
64   }
65
66   return NULL;
67}
68
69
70/**
71 * If we fail to compile a vertex shader we'll use a dummy/fallback shader
72 * that simply emits a (0,0,0,1) vertex position.
73 */
74static const struct tgsi_token *
75get_dummy_vertex_shader(void)
76{
77   static const float zero[4] = { 0.0, 0.0, 0.0, 1.0 };
78   struct ureg_program *ureg;
79   const struct tgsi_token *tokens;
80   struct ureg_src src;
81   struct ureg_dst dst;
82   unsigned num_tokens;
83
84   ureg = ureg_create(TGSI_PROCESSOR_VERTEX);
85   if (!ureg)
86      return NULL;
87
88   dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
89   src = ureg_DECL_immediate(ureg, zero, 4);
90   ureg_MOV(ureg, dst, src);
91   ureg_END(ureg);
92
93   tokens = ureg_get_tokens(ureg, &num_tokens);
94
95   ureg_destroy(ureg);
96
97   return tokens;
98}
99
100
101static enum pipe_error compile_vs( struct svga_context *svga,
102                                   struct svga_vertex_shader *vs,
103                                   const struct svga_vs_compile_key *key,
104                                   struct svga_shader_result **out_result )
105{
106   struct svga_shader_result *result;
107   enum pipe_error ret = PIPE_ERROR;
108
109   result = svga_translate_vertex_program( vs, key );
110   if (result == NULL) {
111      /* some problem during translation, try the dummy shader */
112      const struct tgsi_token *dummy = get_dummy_vertex_shader();
113      if (!dummy) {
114         ret = PIPE_ERROR_OUT_OF_MEMORY;
115         goto fail;
116      }
117      debug_printf("Failed to compile vertex shader, using dummy shader instead.\n");
118      FREE((void *) vs->base.tokens);
119      vs->base.tokens = dummy;
120      result = svga_translate_vertex_program(vs, key);
121      if (result == NULL) {
122         ret = PIPE_ERROR;
123         goto fail;
124      }
125   }
126
127   result->id = util_bitmask_add(svga->vs_bm);
128   if(result->id == UTIL_BITMASK_INVALID_INDEX) {
129      ret = PIPE_ERROR_OUT_OF_MEMORY;
130      goto fail;
131   }
132
133   ret = SVGA3D_DefineShader(svga->swc,
134                             result->id,
135                             SVGA3D_SHADERTYPE_VS,
136                             result->tokens,
137                             result->nr_tokens * sizeof result->tokens[0]);
138   if (ret != PIPE_OK)
139      goto fail;
140
141   *out_result = result;
142   result->next = vs->base.results;
143   vs->base.results = result;
144   return PIPE_OK;
145
146fail:
147   if (result) {
148      if (result->id != UTIL_BITMASK_INVALID_INDEX)
149         util_bitmask_clear( svga->vs_bm, result->id );
150      svga_destroy_shader_result( result );
151   }
152   return ret;
153}
154
155/* SVGA_NEW_PRESCALE, SVGA_NEW_RAST, SVGA_NEW_FS
156 */
157static void
158make_vs_key(struct svga_context *svga, struct svga_vs_compile_key *key)
159{
160   memset(key, 0, sizeof *key);
161   key->need_prescale = svga->state.hw_clear.prescale.enabled;
162   key->allow_psiz = svga->curr.rast->templ.point_size_per_vertex;
163
164   /* SVGA_NEW_FS */
165   key->fs_generic_inputs = svga->curr.fs->generic_inputs;
166}
167
168
169
170static enum pipe_error
171emit_hw_vs(struct svga_context *svga, unsigned dirty)
172{
173   struct svga_shader_result *result = NULL;
174   unsigned id = SVGA3D_INVALID_ID;
175   enum pipe_error ret = PIPE_OK;
176
177   /* SVGA_NEW_NEED_SWTNL */
178   if (!svga->state.sw.need_swtnl) {
179      struct svga_vertex_shader *vs = svga->curr.vs;
180      struct svga_vs_compile_key key;
181
182      make_vs_key( svga, &key );
183
184      result = search_vs_key( vs, &key );
185      if (!result) {
186         ret = compile_vs( svga, vs, &key, &result );
187         if (ret != PIPE_OK)
188            return ret;
189      }
190
191      assert (result);
192      id = result->id;
193   }
194
195   if (result != svga->state.hw_draw.vs) {
196      ret = SVGA3D_SetShader(svga->swc,
197                             SVGA3D_SHADERTYPE_VS,
198                             id );
199      if (ret != PIPE_OK)
200         return ret;
201
202      svga->dirty |= SVGA_NEW_VS_RESULT;
203      svga->state.hw_draw.vs = result;
204   }
205
206   return PIPE_OK;
207}
208
209struct svga_tracked_state svga_hw_vs =
210{
211   "vertex shader (hwtnl)",
212   (SVGA_NEW_VS |
213    SVGA_NEW_FS |
214    SVGA_NEW_PRESCALE |
215    SVGA_NEW_NEED_SWTNL),
216   emit_hw_vs
217};
218