1 /**********************************************************
2 * Copyright 2008-2009 VMware, Inc. All rights reserved.
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:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
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
24 **********************************************************/
27 #include "util/u_helpers.h"
28 #include "util/u_inlines.h"
29 #include "util/u_prim.h"
30 #include "util/u_prim_restart.h"
32 #include "svga_context.h"
33 #include "svga_draw.h"
34 #include "svga_shader.h"
35 #include "svga_surface.h"
36 #include "svga_swtnl.h"
37 #include "svga_debug.h"
38 #include "svga_resource_buffer.h"
40 /* Returns TRUE if we are currently using flat shading.
43 is_using_flat_shading(const struct svga_context
*svga
)
46 svga
->state
.hw_draw
.fs
? svga
->state
.hw_draw
.fs
->uses_flat_interp
: FALSE
;
50 static enum pipe_error
51 retry_draw_range_elements(struct svga_context
*svga
,
52 const struct pipe_draw_info
*info
,
57 SVGA_STATS_TIME_PUSH(svga_sws(svga
), SVGA_STATS_TIME_DRAWELEMENTS
);
59 ret
= svga_hwtnl_draw_range_elements(svga
->hwtnl
, info
, count
);
61 svga_context_flush(svga
, NULL
);
62 ret
= svga_hwtnl_draw_range_elements(svga
->hwtnl
, info
, count
);
65 assert (ret
== PIPE_OK
);
66 SVGA_STATS_TIME_POP(svga_sws(svga
));
71 static enum pipe_error
72 retry_draw_arrays(struct svga_context
*svga
,
73 enum pipe_prim_type prim
, unsigned start
, unsigned count
,
74 unsigned start_instance
, unsigned instance_count
)
78 SVGA_STATS_TIME_PUSH(svga_sws(svga
), SVGA_STATS_TIME_DRAWARRAYS
);
80 for (unsigned try = 0; try < 2; try++) {
81 ret
= svga_hwtnl_draw_arrays(svga
->hwtnl
, prim
, start
, count
,
82 start_instance
, instance_count
);
85 svga_context_flush(svga
, NULL
);
88 SVGA_STATS_TIME_POP(svga_sws(svga
));
94 * Determine if we need to implement primitive restart with a fallback
95 * path which breaks the original primitive into sub-primitive at the
99 need_fallback_prim_restart(const struct svga_context
*svga
,
100 const struct pipe_draw_info
*info
)
102 if (info
->primitive_restart
&& info
->index_size
) {
103 if (!svga_have_vgpu10(svga
))
105 else if (!svga
->state
.sw
.need_swtnl
) {
106 if (info
->index_size
== 1)
107 return TRUE
; /* no device support for 1-byte indexes */
108 else if (info
->index_size
== 2)
109 return info
->restart_index
!= 0xffff;
111 return info
->restart_index
!= 0xffffffff;
120 svga_draw_vbo(struct pipe_context
*pipe
, const struct pipe_draw_info
*info
)
122 struct svga_context
*svga
= svga_context(pipe
);
123 enum pipe_prim_type reduced_prim
= u_reduced_prim(info
->mode
);
124 unsigned count
= info
->count
;
125 enum pipe_error ret
= 0;
126 boolean needed_swtnl
;
128 SVGA_STATS_TIME_PUSH(svga_sws(svga
), SVGA_STATS_TIME_DRAWVBO
);
130 svga
->hud
.num_draw_calls
++; /* for SVGA_QUERY_NUM_DRAW_CALLS */
132 if (u_reduced_prim(info
->mode
) == PIPE_PRIM_TRIANGLES
&&
133 svga
->curr
.rast
->templ
.cull_face
== PIPE_FACE_FRONT_AND_BACK
)
137 * Mark currently bound target surfaces as dirty
138 * doesn't really matter if it is done before drawing.
140 * TODO If we ever normaly return something other then
141 * true we should not mark it as dirty then.
143 svga_mark_surfaces_dirty(svga_context(pipe
));
145 if (svga
->curr
.reduced_prim
!= reduced_prim
) {
146 svga
->curr
.reduced_prim
= reduced_prim
;
147 svga
->dirty
|= SVGA_NEW_REDUCED_PRIMITIVE
;
150 if (need_fallback_prim_restart(svga
, info
)) {
152 r
= util_draw_vbo_without_prim_restart(pipe
, info
);
153 assert(r
== PIPE_OK
);
158 if (!u_trim_pipe_prim(info
->mode
, &count
))
161 needed_swtnl
= svga
->state
.sw
.need_swtnl
;
163 svga_update_state_retry(svga
, SVGA_STATE_NEED_SWTNL
);
165 if (svga
->state
.sw
.need_swtnl
) {
166 svga
->hud
.num_fallbacks
++; /* for SVGA_QUERY_NUM_FALLBACKS */
169 * We're switching from HW to SW TNL. SW TNL will require mapping all
170 * currently bound vertex buffers, some of which may already be
171 * referenced in the current command buffer as result of previous HW
172 * TNL. So flush now, to prevent the context to flush while a referred
173 * vertex buffer is mapped.
176 svga_context_flush(svga
, NULL
);
179 /* Avoid leaking the previous hwtnl bias to swtnl */
180 svga_hwtnl_set_index_bias(svga
->hwtnl
, 0);
181 ret
= svga_swtnl_draw_vbo(svga
, info
);
184 if (!svga_update_state_retry(svga
, SVGA_STATE_HW_DRAW
)) {
185 static const char *msg
= "State update failed, skipping draw call";
186 debug_printf("%s\n", msg
);
187 pipe_debug_message(&svga
->debug
.callback
, INFO
, "%s", msg
);
190 svga_hwtnl_set_fillmode(svga
->hwtnl
, svga
->curr
.rast
->hw_fillmode
);
192 /** determine if flatshade is to be used after svga_update_state()
193 * in case the fragment shader is changed.
195 svga_hwtnl_set_flatshade(svga
->hwtnl
,
196 svga
->curr
.rast
->templ
.flatshade
||
197 is_using_flat_shading(svga
),
198 svga
->curr
.rast
->templ
.flatshade_first
);
200 if (info
->index_size
) {
201 ret
= retry_draw_range_elements(svga
, info
, count
);
204 ret
= retry_draw_arrays(svga
, info
->mode
, info
->start
, count
,
205 info
->start_instance
, info
->instance_count
);
209 /* XXX: Silence warnings, do something sensible here? */
212 if (SVGA_DEBUG
& DEBUG_FLUSH
) {
213 svga_hwtnl_flush_retry(svga
);
214 svga_context_flush(svga
, NULL
);
218 SVGA_STATS_TIME_POP(svga_sws(svga
));
223 svga_init_draw_functions(struct svga_context
*svga
)
225 svga
->pipe
.draw_vbo
= svga_draw_vbo
;