1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
4 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28
29/**
30 * @author Jose Fonseca <jfonseca@vmware.com>
31 * @author Keith Whitwell <keith@tungstengraphics.com>
32 */
33
34#include "util/u_memory.h"
35#include "util/u_math.h"
36#include "util/u_dump.h"
37#include "draw/draw_context.h"
38#include "lp_screen.h"
39#include "lp_context.h"
40#include "lp_state.h"
41#include "lp_debug.h"
42
43
44static void *
45llvmpipe_create_blend_state(struct pipe_context *pipe,
46                            const struct pipe_blend_state *blend)
47{
48   struct pipe_blend_state *state = mem_dup(blend, sizeof *blend);
49   int i;
50
51   if (LP_PERF & PERF_NO_BLEND) {
52      state->independent_blend_enable = 0;
53      for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++)
54	 state->rt[i].blend_enable = 0;
55   }
56
57   return state;
58}
59
60
61static void
62llvmpipe_bind_blend_state(struct pipe_context *pipe, void *blend)
63{
64   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
65
66   if (llvmpipe->blend == blend)
67      return;
68
69   draw_flush(llvmpipe->draw);
70
71   llvmpipe->blend = blend;
72
73   llvmpipe->dirty |= LP_NEW_BLEND;
74}
75
76
77static void
78llvmpipe_delete_blend_state(struct pipe_context *pipe, void *blend)
79{
80   FREE( blend );
81}
82
83
84static void
85llvmpipe_set_blend_color(struct pipe_context *pipe,
86                         const struct pipe_blend_color *blend_color)
87{
88   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
89
90   if(!blend_color)
91      return;
92
93   if(memcmp(&llvmpipe->blend_color, blend_color, sizeof *blend_color) == 0)
94      return;
95
96   draw_flush(llvmpipe->draw);
97
98   memcpy(&llvmpipe->blend_color, blend_color, sizeof *blend_color);
99
100   llvmpipe->dirty |= LP_NEW_BLEND_COLOR;
101}
102
103
104/** XXX move someday?  Or consolidate all these simple state setters
105 * into one file.
106 */
107
108
109static void *
110llvmpipe_create_depth_stencil_state(struct pipe_context *pipe,
111				    const struct pipe_depth_stencil_alpha_state *depth_stencil)
112{
113   struct pipe_depth_stencil_alpha_state *state;
114
115   state = mem_dup(depth_stencil, sizeof *depth_stencil);
116
117   if (LP_PERF & PERF_NO_DEPTH) {
118      state->depth.enabled = 0;
119      state->depth.writemask = 0;
120      state->stencil[0].enabled = 0;
121      state->stencil[1].enabled = 0;
122   }
123
124   if (LP_PERF & PERF_NO_ALPHATEST) {
125      state->alpha.enabled = 0;
126   }
127
128   return state;
129}
130
131
132static void
133llvmpipe_bind_depth_stencil_state(struct pipe_context *pipe,
134                                  void *depth_stencil)
135{
136   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
137
138   if (llvmpipe->depth_stencil == depth_stencil)
139      return;
140
141   draw_flush(llvmpipe->draw);
142
143   llvmpipe->depth_stencil = depth_stencil;
144
145   llvmpipe->dirty |= LP_NEW_DEPTH_STENCIL_ALPHA;
146}
147
148
149static void
150llvmpipe_delete_depth_stencil_state(struct pipe_context *pipe, void *depth)
151{
152   FREE( depth );
153}
154
155
156static void
157llvmpipe_set_stencil_ref(struct pipe_context *pipe,
158                         const struct pipe_stencil_ref *stencil_ref)
159{
160   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
161
162   if(!stencil_ref)
163      return;
164
165   if(memcmp(&llvmpipe->stencil_ref, stencil_ref, sizeof *stencil_ref) == 0)
166      return;
167
168   draw_flush(llvmpipe->draw);
169
170   memcpy(&llvmpipe->stencil_ref, stencil_ref, sizeof *stencil_ref);
171
172   /* not sure. want new flag? */
173   llvmpipe->dirty |= LP_NEW_DEPTH_STENCIL_ALPHA;
174}
175
176static void
177llvmpipe_set_sample_mask(struct pipe_context *pipe,
178                         unsigned sample_mask)
179{
180}
181
182void
183llvmpipe_init_blend_funcs(struct llvmpipe_context *llvmpipe)
184{
185   llvmpipe->pipe.create_blend_state = llvmpipe_create_blend_state;
186   llvmpipe->pipe.bind_blend_state   = llvmpipe_bind_blend_state;
187   llvmpipe->pipe.delete_blend_state = llvmpipe_delete_blend_state;
188
189   llvmpipe->pipe.create_depth_stencil_alpha_state = llvmpipe_create_depth_stencil_state;
190   llvmpipe->pipe.bind_depth_stencil_alpha_state   = llvmpipe_bind_depth_stencil_state;
191   llvmpipe->pipe.delete_depth_stencil_alpha_state = llvmpipe_delete_depth_stencil_state;
192
193   llvmpipe->pipe.set_blend_color = llvmpipe_set_blend_color;
194
195   llvmpipe->pipe.set_stencil_ref = llvmpipe_set_stencil_ref;
196   llvmpipe->pipe.set_sample_mask = llvmpipe_set_sample_mask;
197}
198