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 **********************************************************/
28 #include "util/u_inlines.h"
29 #include "util/u_prim.h"
30 #include "indices/u_indices.h"
32 #include "svga_hw_reg.h"
33 #include "svga_draw.h"
34 #include "svga_draw_private.h"
35 #include "svga_context.h"
36 #include "svga_shader.h"
42 static enum pipe_error
43 generate_indices(struct svga_hwtnl
*hwtnl
,
46 u_generate_func generate
, struct pipe_resource
**out_buf
)
48 struct pipe_context
*pipe
= &hwtnl
->svga
->pipe
;
49 struct pipe_transfer
*transfer
;
50 unsigned size
= index_size
* nr
;
51 struct pipe_resource
*dst
= NULL
;
54 dst
= pipe_buffer_create(pipe
->screen
, PIPE_BIND_INDEX_BUFFER
,
55 PIPE_USAGE_IMMUTABLE
, size
);
59 dst_map
= pipe_buffer_map(pipe
, dst
, PIPE_TRANSFER_WRITE
, &transfer
);
63 generate(0, nr
, dst_map
);
65 pipe_buffer_unmap(pipe
, transfer
);
72 pipe_buffer_unmap(pipe
, transfer
);
75 pipe
->screen
->resource_destroy(pipe
->screen
, dst
);
77 return PIPE_ERROR_OUT_OF_MEMORY
;
82 compare(unsigned cached_nr
, unsigned nr
, unsigned type
)
84 if (type
== U_GENERATE_REUSABLE
)
85 return cached_nr
>= nr
;
87 return cached_nr
== nr
;
91 static enum pipe_error
92 retrieve_or_generate_indices(struct svga_hwtnl
*hwtnl
,
93 enum pipe_prim_type prim
,
97 u_generate_func generate
,
98 struct pipe_resource
**out_buf
)
100 enum pipe_error ret
= PIPE_OK
;
103 SVGA_STATS_TIME_PUSH(svga_sws(hwtnl
->svga
), SVGA_STATS_TIME_GENERATEINDICES
);
105 for (i
= 0; i
< IDX_CACHE_MAX
; i
++) {
106 if (hwtnl
->index_cache
[prim
][i
].buffer
!= NULL
&&
107 hwtnl
->index_cache
[prim
][i
].generate
== generate
) {
108 if (compare(hwtnl
->index_cache
[prim
][i
].gen_nr
, gen_nr
, gen_type
)) {
109 pipe_resource_reference(out_buf
,
110 hwtnl
->index_cache
[prim
][i
].buffer
);
113 debug_printf("%s retrieve %d/%d\n", __FUNCTION__
, i
, gen_nr
);
117 else if (gen_type
== U_GENERATE_REUSABLE
) {
118 pipe_resource_reference(&hwtnl
->index_cache
[prim
][i
].buffer
,
122 debug_printf("%s discard %d/%d\n", __FUNCTION__
,
123 i
, hwtnl
->index_cache
[prim
][i
].gen_nr
);
130 if (i
== IDX_CACHE_MAX
) {
131 unsigned smallest
= 0;
132 unsigned smallest_size
= ~0;
134 for (i
= 0; i
< IDX_CACHE_MAX
&& smallest_size
; i
++) {
135 if (hwtnl
->index_cache
[prim
][i
].buffer
== NULL
) {
139 else if (hwtnl
->index_cache
[prim
][i
].gen_nr
< smallest
) {
141 smallest_size
= hwtnl
->index_cache
[prim
][i
].gen_nr
;
145 assert(smallest
!= IDX_CACHE_MAX
);
147 pipe_resource_reference(&hwtnl
->index_cache
[prim
][smallest
].buffer
,
151 debug_printf("%s discard smallest %d/%d\n", __FUNCTION__
,
152 smallest
, smallest_size
);
157 ret
= generate_indices(hwtnl
, gen_nr
, gen_size
, generate
, out_buf
);
161 hwtnl
->index_cache
[prim
][i
].generate
= generate
;
162 hwtnl
->index_cache
[prim
][i
].gen_nr
= gen_nr
;
163 pipe_resource_reference(&hwtnl
->index_cache
[prim
][i
].buffer
, *out_buf
);
166 debug_printf("%s cache %d/%d\n", __FUNCTION__
,
167 i
, hwtnl
->index_cache
[prim
][i
].gen_nr
);
170 SVGA_STATS_TIME_POP(svga_sws(hwtnl
->svga
));
175 static enum pipe_error
176 simple_draw_arrays(struct svga_hwtnl
*hwtnl
,
177 enum pipe_prim_type prim
, unsigned start
, unsigned count
,
178 unsigned start_instance
, unsigned instance_count
)
180 SVGA3dPrimitiveRange range
;
184 hw_prim
= svga_translate_prim(prim
, count
, &hw_count
);
186 return PIPE_ERROR_BAD_INPUT
;
188 range
.primType
= hw_prim
;
189 range
.primitiveCount
= hw_count
;
190 range
.indexArray
.surfaceId
= SVGA3D_INVALID_ID
;
191 range
.indexArray
.offset
= 0;
192 range
.indexArray
.stride
= 0;
193 range
.indexWidth
= 0;
194 range
.indexBias
= start
;
196 /* Min/max index should be calculated prior to applying bias, so we
197 * end up with min_index = 0, max_index = count - 1 and everybody
198 * looking at those numbers knows to adjust them by
201 return svga_hwtnl_prim(hwtnl
, &range
, count
,
203 start_instance
, instance_count
);
208 svga_hwtnl_draw_arrays(struct svga_hwtnl
*hwtnl
,
209 enum pipe_prim_type prim
, unsigned start
, unsigned count
,
210 unsigned start_instance
, unsigned instance_count
)
212 enum pipe_prim_type gen_prim
;
213 unsigned gen_size
, gen_nr
;
214 enum indices_mode gen_type
;
215 u_generate_func gen_func
;
216 enum pipe_error ret
= PIPE_OK
;
217 unsigned api_pv
= hwtnl
->api_pv
;
218 struct svga_context
*svga
= hwtnl
->svga
;
220 SVGA_STATS_TIME_PUSH(svga_sws(svga
), SVGA_STATS_TIME_HWTNLDRAWARRAYS
);
222 if (svga
->curr
.rast
->templ
.fill_front
!=
223 svga
->curr
.rast
->templ
.fill_back
) {
224 assert(hwtnl
->api_fillmode
== PIPE_POLYGON_MODE_FILL
);
227 if (svga
->curr
.rast
->templ
.flatshade
&&
228 svga
->state
.hw_draw
.fs
->constant_color_output
) {
229 /* The fragment color is a constant, not per-vertex so the whole
230 * primitive will be the same color (except for possible blending).
231 * We can ignore the current provoking vertex state and use whatever
232 * the hardware wants.
234 api_pv
= hwtnl
->hw_pv
;
236 if (hwtnl
->api_fillmode
== PIPE_POLYGON_MODE_FILL
) {
237 /* Do some simple primitive conversions to avoid index buffer
238 * generation below. Note that polygons and quads are not directly
239 * supported by the svga device. Also note, we can only do this
240 * for flat/constant-colored rendering because of provoking vertex.
242 if (prim
== PIPE_PRIM_POLYGON
) {
243 prim
= PIPE_PRIM_TRIANGLE_FAN
;
245 else if (prim
== PIPE_PRIM_QUADS
&& count
== 4) {
246 prim
= PIPE_PRIM_TRIANGLE_FAN
;
251 if (svga_need_unfilled_fallback(hwtnl
, prim
)) {
252 /* Convert unfilled polygons into points, lines, triangles */
253 gen_type
= u_unfilled_generator(prim
,
258 &gen_size
, &gen_nr
, &gen_func
);
261 /* Convert PIPE_PRIM_LINE_LOOP to PIPE_PRIM_LINESTRIP,
262 * convert PIPE_PRIM_POLYGON to PIPE_PRIM_TRIANGLE_FAN,
263 * etc, if needed (as determined by svga_hw_prims mask).
265 gen_type
= u_index_generator(svga_hw_prims
,
271 &gen_prim
, &gen_size
, &gen_nr
, &gen_func
);
274 if (gen_type
== U_GENERATE_LINEAR
) {
275 ret
= simple_draw_arrays(hwtnl
, gen_prim
, start
, count
,
276 start_instance
, instance_count
);
279 struct pipe_resource
*gen_buf
= NULL
;
281 /* Need to draw as indexed primitive.
282 * Potentially need to run the gen func to build an index buffer.
284 ret
= retrieve_or_generate_indices(hwtnl
,
288 gen_size
, gen_func
, &gen_buf
);
289 if (ret
== PIPE_OK
) {
290 pipe_debug_message(&svga
->debug
.callback
, PERF_INFO
,
291 "generating temporary index buffer for drawing %s",
294 ret
= svga_hwtnl_simple_draw_range_elements(hwtnl
,
306 pipe_resource_reference(&gen_buf
, NULL
);
310 SVGA_STATS_TIME_POP(svga_sws(svga
));