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_math.h"
29#include "util/u_memory.h"
30
31#include "svga_context.h"
32#include "svga_hw_reg.h"
33
34
35static INLINE unsigned
36svga_translate_compare_func(unsigned func)
37{
38   switch (func) {
39   case PIPE_FUNC_NEVER:     return SVGA3D_CMP_NEVER;
40   case PIPE_FUNC_LESS:      return SVGA3D_CMP_LESS;
41   case PIPE_FUNC_LEQUAL:    return SVGA3D_CMP_LESSEQUAL;
42   case PIPE_FUNC_GREATER:   return SVGA3D_CMP_GREATER;
43   case PIPE_FUNC_GEQUAL:    return SVGA3D_CMP_GREATEREQUAL;
44   case PIPE_FUNC_NOTEQUAL:  return SVGA3D_CMP_NOTEQUAL;
45   case PIPE_FUNC_EQUAL:     return SVGA3D_CMP_EQUAL;
46   case PIPE_FUNC_ALWAYS:    return SVGA3D_CMP_ALWAYS;
47   default:
48      assert(0);
49      return SVGA3D_CMP_ALWAYS;
50   }
51}
52
53static INLINE unsigned
54svga_translate_stencil_op(unsigned op)
55{
56   switch (op) {
57   case PIPE_STENCIL_OP_KEEP:      return SVGA3D_STENCILOP_KEEP;
58   case PIPE_STENCIL_OP_ZERO:      return SVGA3D_STENCILOP_ZERO;
59   case PIPE_STENCIL_OP_REPLACE:   return SVGA3D_STENCILOP_REPLACE;
60   case PIPE_STENCIL_OP_INCR:      return SVGA3D_STENCILOP_INCRSAT;
61   case PIPE_STENCIL_OP_DECR:      return SVGA3D_STENCILOP_DECRSAT;
62   case PIPE_STENCIL_OP_INCR_WRAP: return SVGA3D_STENCILOP_INCR;
63   case PIPE_STENCIL_OP_DECR_WRAP: return SVGA3D_STENCILOP_DECR;
64   case PIPE_STENCIL_OP_INVERT:    return SVGA3D_STENCILOP_INVERT;
65   default:
66      assert(0);
67      return SVGA3D_STENCILOP_KEEP;
68   }
69}
70
71
72static void *
73svga_create_depth_stencil_state(struct pipe_context *pipe,
74				const struct pipe_depth_stencil_alpha_state *templ)
75{
76   struct svga_depth_stencil_state *ds = CALLOC_STRUCT( svga_depth_stencil_state );
77
78   /* Don't try to figure out CW/CCW correspondence with
79    * stencil[0]/[1] at this point.  Presumably this can change as
80    * back/front face are modified.
81    */
82   ds->stencil[0].enabled = templ->stencil[0].enabled;
83   if (ds->stencil[0].enabled) {
84      ds->stencil[0].func  = svga_translate_compare_func(templ->stencil[0].func);
85      ds->stencil[0].fail  = svga_translate_stencil_op(templ->stencil[0].fail_op);
86      ds->stencil[0].zfail = svga_translate_stencil_op(templ->stencil[0].zfail_op);
87      ds->stencil[0].pass  = svga_translate_stencil_op(templ->stencil[0].zpass_op);
88
89      /* SVGA3D has one ref/mask/writemask triple shared between front &
90       * back face stencil.  We really need two:
91       */
92      ds->stencil_mask      = templ->stencil[0].valuemask & 0xff;
93      ds->stencil_writemask = templ->stencil[0].writemask & 0xff;
94   }
95
96
97   ds->stencil[1].enabled = templ->stencil[1].enabled;
98   if (templ->stencil[1].enabled) {
99      ds->stencil[1].func   = svga_translate_compare_func(templ->stencil[1].func);
100      ds->stencil[1].fail   = svga_translate_stencil_op(templ->stencil[1].fail_op);
101      ds->stencil[1].zfail  = svga_translate_stencil_op(templ->stencil[1].zfail_op);
102      ds->stencil[1].pass   = svga_translate_stencil_op(templ->stencil[1].zpass_op);
103
104      ds->stencil_mask      = templ->stencil[1].valuemask & 0xff;
105      ds->stencil_writemask = templ->stencil[1].writemask & 0xff;
106   }
107
108
109   ds->zenable = templ->depth.enabled;
110   if (ds->zenable) {
111      ds->zfunc = svga_translate_compare_func(templ->depth.func);
112      ds->zwriteenable = templ->depth.writemask;
113   }
114
115   ds->alphatestenable = templ->alpha.enabled;
116   if (ds->alphatestenable) {
117      ds->alphafunc = svga_translate_compare_func(templ->alpha.func);
118      ds->alpharef = templ->alpha.ref_value;
119   }
120
121   return ds;
122}
123
124static void svga_bind_depth_stencil_state(struct pipe_context *pipe,
125                                          void *depth_stencil)
126{
127   struct svga_context *svga = svga_context(pipe);
128
129   svga->curr.depth = (const struct svga_depth_stencil_state *)depth_stencil;
130   svga->dirty |= SVGA_NEW_DEPTH_STENCIL;
131}
132
133static void svga_delete_depth_stencil_state(struct pipe_context *pipe,
134                                            void *depth_stencil)
135{
136   FREE(depth_stencil);
137}
138
139
140static void svga_set_stencil_ref( struct pipe_context *pipe,
141                                  const struct pipe_stencil_ref *stencil_ref )
142{
143   struct svga_context *svga = svga_context(pipe);
144
145   svga->curr.stencil_ref = *stencil_ref;
146
147   svga->dirty |= SVGA_NEW_STENCIL_REF;
148}
149
150static void
151svga_set_sample_mask(struct pipe_context *pipe,
152                     unsigned sample_mask)
153{
154}
155
156
157void svga_init_depth_stencil_functions( struct svga_context *svga )
158{
159   svga->pipe.create_depth_stencil_alpha_state = svga_create_depth_stencil_state;
160   svga->pipe.bind_depth_stencil_alpha_state = svga_bind_depth_stencil_state;
161   svga->pipe.delete_depth_stencil_alpha_state = svga_delete_depth_stencil_state;
162
163   svga->pipe.set_stencil_ref = svga_set_stencil_ref;
164   svga->pipe.set_sample_mask = svga_set_sample_mask;
165}
166
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170