1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
4 * Copyright 2007 VMware, Inc.
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 VMWARE 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 <keithw@vmware.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
50   if (LP_PERF & PERF_NO_BLEND) {
51      state->independent_blend_enable = 0;
52      for (unsigned i = 0; i < PIPE_MAX_COLOR_BUFS; i++)
53         state->rt[i].blend_enable = 0;
54   }
55
56   return state;
57}
58
59
60static void
61llvmpipe_bind_blend_state(struct pipe_context *pipe, void *blend)
62{
63   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
64
65   if (llvmpipe->blend == blend)
66      return;
67
68   draw_flush(llvmpipe->draw);
69
70   llvmpipe->blend = blend;
71
72   llvmpipe->dirty |= LP_NEW_BLEND;
73}
74
75
76static void
77llvmpipe_delete_blend_state(struct pipe_context *pipe, void *blend)
78{
79   FREE(blend);
80}
81
82
83static void
84llvmpipe_set_blend_color(struct pipe_context *pipe,
85                         const struct pipe_blend_color *blend_color)
86{
87   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
88
89   if (!blend_color)
90      return;
91
92   if (memcmp(&llvmpipe->blend_color, blend_color, sizeof *blend_color) == 0)
93      return;
94
95   draw_flush(llvmpipe->draw);
96
97   memcpy(&llvmpipe->blend_color, blend_color, sizeof *blend_color);
98
99   llvmpipe->dirty |= LP_NEW_BLEND_COLOR;
100}
101
102
103/** XXX move someday?  Or consolidate all these simple state setters
104 * into one file.
105 */
106
107
108static void *
109llvmpipe_create_depth_stencil_state(struct pipe_context *pipe,
110                                    const struct pipe_depth_stencil_alpha_state *depth_stencil)
111{
112   struct pipe_depth_stencil_alpha_state *state;
113
114   state = mem_dup(depth_stencil, sizeof *depth_stencil);
115
116   if (LP_PERF & PERF_NO_DEPTH) {
117      state->depth_enabled = 0;
118      state->depth_writemask = 0;
119      state->stencil[0].enabled = 0;
120      state->stencil[1].enabled = 0;
121   }
122
123   if (LP_PERF & PERF_NO_ALPHATEST) {
124      state->alpha_enabled = 0;
125   }
126
127   return state;
128}
129
130
131static void
132llvmpipe_bind_depth_stencil_state(struct pipe_context *pipe,
133                                  void *depth_stencil)
134{
135   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
136
137   if (llvmpipe->depth_stencil == depth_stencil)
138      return;
139
140   draw_flush(llvmpipe->draw);
141
142   llvmpipe->depth_stencil = depth_stencil;
143
144   llvmpipe->dirty |= LP_NEW_DEPTH_STENCIL_ALPHA;
145}
146
147
148static void
149llvmpipe_delete_depth_stencil_state(struct pipe_context *pipe, void *depth)
150{
151   FREE(depth);
152}
153
154
155static void
156llvmpipe_set_stencil_ref(struct pipe_context *pipe,
157                         const struct pipe_stencil_ref stencil_ref)
158{
159   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
160
161   if (memcmp(&llvmpipe->stencil_ref, &stencil_ref, sizeof stencil_ref) == 0)
162      return;
163
164   draw_flush(llvmpipe->draw);
165
166   memcpy(&llvmpipe->stencil_ref, &stencil_ref, sizeof stencil_ref);
167
168   /* not sure. want new flag? */
169   llvmpipe->dirty |= LP_NEW_DEPTH_STENCIL_ALPHA;
170}
171
172static void
173llvmpipe_set_sample_mask(struct pipe_context *pipe,
174                         unsigned sample_mask)
175{
176   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
177
178   if (sample_mask != llvmpipe->sample_mask) {
179      draw_flush(llvmpipe->draw);
180
181      llvmpipe->sample_mask = sample_mask;
182
183      llvmpipe->dirty |= LP_NEW_SAMPLE_MASK;
184   }
185}
186
187static void
188llvmpipe_set_min_samples(struct pipe_context *pipe,
189                         unsigned min_samples)
190{
191   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
192
193   if (min_samples != llvmpipe->min_samples) {
194      llvmpipe->min_samples = min_samples;
195
196      llvmpipe->dirty |= LP_NEW_FS;
197   }
198}
199
200void
201llvmpipe_init_blend_funcs(struct llvmpipe_context *llvmpipe)
202{
203   llvmpipe->pipe.create_blend_state = llvmpipe_create_blend_state;
204   llvmpipe->pipe.bind_blend_state   = llvmpipe_bind_blend_state;
205   llvmpipe->pipe.delete_blend_state = llvmpipe_delete_blend_state;
206
207   llvmpipe->pipe.create_depth_stencil_alpha_state = llvmpipe_create_depth_stencil_state;
208   llvmpipe->pipe.bind_depth_stencil_alpha_state   = llvmpipe_bind_depth_stencil_state;
209   llvmpipe->pipe.delete_depth_stencil_alpha_state = llvmpipe_delete_depth_stencil_state;
210
211   llvmpipe->pipe.set_blend_color = llvmpipe_set_blend_color;
212
213   llvmpipe->pipe.set_stencil_ref = llvmpipe_set_stencil_ref;
214   llvmpipe->pipe.set_sample_mask = llvmpipe_set_sample_mask;
215   llvmpipe->pipe.set_min_samples = llvmpipe_set_min_samples;
216
217   llvmpipe->dirty |= LP_NEW_SAMPLE_MASK;
218   llvmpipe->sample_mask = ~0;
219}
220