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 "svga_cmd.h"
27
28 #include "util/u_inlines.h"
29 #include "util/u_prim.h"
30 #include "indices/u_indices.h"
31
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"
37
38
39 #define DBG 0
40
41
42 static enum pipe_error
generate_indices(struct svga_hwtnl * hwtnl,unsigned nr,unsigned index_size,u_generate_func generate,struct pipe_resource ** out_buf)43 generate_indices(struct svga_hwtnl *hwtnl,
44 unsigned nr,
45 unsigned index_size,
46 u_generate_func generate, struct pipe_resource **out_buf)
47 {
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;
52 void *dst_map = NULL;
53
54 dst = pipe_buffer_create(pipe->screen, PIPE_BIND_INDEX_BUFFER,
55 PIPE_USAGE_IMMUTABLE, size);
56 if (!dst)
57 goto fail;
58
59 dst_map = pipe_buffer_map(pipe, dst, PIPE_MAP_WRITE, &transfer);
60 if (!dst_map)
61 goto fail;
62
63 generate(0, nr, dst_map);
64
65 pipe_buffer_unmap(pipe, transfer);
66
67 *out_buf = dst;
68 return PIPE_OK;
69
70 fail:
71 if (dst_map)
72 pipe_buffer_unmap(pipe, transfer);
73
74 if (dst)
75 pipe->screen->resource_destroy(pipe->screen, dst);
76
77 return PIPE_ERROR_OUT_OF_MEMORY;
78 }
79
80
81 static boolean
compare(unsigned cached_nr,unsigned nr,unsigned type)82 compare(unsigned cached_nr, unsigned nr, unsigned type)
83 {
84 if (type == U_GENERATE_REUSABLE)
85 return cached_nr >= nr;
86 else
87 return cached_nr == nr;
88 }
89
90
91 static enum pipe_error
retrieve_or_generate_indices(struct svga_hwtnl * hwtnl,enum pipe_prim_type prim,unsigned gen_type,unsigned gen_nr,unsigned gen_size,u_generate_func generate,struct pipe_resource ** out_buf)92 retrieve_or_generate_indices(struct svga_hwtnl *hwtnl,
93 enum pipe_prim_type prim,
94 unsigned gen_type,
95 unsigned gen_nr,
96 unsigned gen_size,
97 u_generate_func generate,
98 struct pipe_resource **out_buf)
99 {
100 enum pipe_error ret = PIPE_OK;
101 int i;
102
103 SVGA_STATS_TIME_PUSH(svga_sws(hwtnl->svga), SVGA_STATS_TIME_GENERATEINDICES);
104
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);
111
112 if (DBG)
113 debug_printf("%s retrieve %d/%d\n", __FUNCTION__, i, gen_nr);
114
115 goto done;
116 }
117 else if (gen_type == U_GENERATE_REUSABLE) {
118 pipe_resource_reference(&hwtnl->index_cache[prim][i].buffer,
119 NULL);
120
121 if (DBG)
122 debug_printf("%s discard %d/%d\n", __FUNCTION__,
123 i, hwtnl->index_cache[prim][i].gen_nr);
124
125 break;
126 }
127 }
128 }
129
130 if (i == IDX_CACHE_MAX) {
131 unsigned smallest = 0;
132 unsigned smallest_size = ~0;
133
134 for (i = 0; i < IDX_CACHE_MAX && smallest_size; i++) {
135 if (hwtnl->index_cache[prim][i].buffer == NULL) {
136 smallest = i;
137 smallest_size = 0;
138 }
139 else if (hwtnl->index_cache[prim][i].gen_nr < smallest) {
140 smallest = i;
141 smallest_size = hwtnl->index_cache[prim][i].gen_nr;
142 }
143 }
144
145 assert(smallest != IDX_CACHE_MAX);
146
147 pipe_resource_reference(&hwtnl->index_cache[prim][smallest].buffer,
148 NULL);
149
150 if (DBG)
151 debug_printf("%s discard smallest %d/%d\n", __FUNCTION__,
152 smallest, smallest_size);
153
154 i = smallest;
155 }
156
157 ret = generate_indices(hwtnl, gen_nr, gen_size, generate, out_buf);
158 if (ret != PIPE_OK)
159 goto done;
160
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);
164
165 if (DBG)
166 debug_printf("%s cache %d/%d\n", __FUNCTION__,
167 i, hwtnl->index_cache[prim][i].gen_nr);
168
169 done:
170 SVGA_STATS_TIME_POP(svga_sws(hwtnl->svga));
171 return ret;
172 }
173
174
175 static enum pipe_error
simple_draw_arrays(struct svga_hwtnl * hwtnl,enum pipe_prim_type prim,unsigned start,unsigned count,unsigned start_instance,unsigned instance_count,ubyte vertices_per_patch)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,
179 ubyte vertices_per_patch)
180 {
181 SVGA3dPrimitiveRange range;
182 unsigned hw_prim;
183 unsigned hw_count;
184
185 hw_prim = svga_translate_prim(prim, count, &hw_count, vertices_per_patch);
186 if (hw_count == 0)
187 return PIPE_ERROR_BAD_INPUT;
188
189 range.primType = hw_prim;
190 range.primitiveCount = hw_count;
191 range.indexArray.surfaceId = SVGA3D_INVALID_ID;
192 range.indexArray.offset = 0;
193 range.indexArray.stride = 0;
194 range.indexWidth = 0;
195 range.indexBias = start;
196
197 /* Min/max index should be calculated prior to applying bias, so we
198 * end up with min_index = 0, max_index = count - 1 and everybody
199 * looking at those numbers knows to adjust them by
200 * range.indexBias.
201 */
202 return svga_hwtnl_prim(hwtnl, &range, count,
203 0, count - 1, NULL,
204 start_instance, instance_count,
205 NULL, NULL);
206 }
207
208
209 enum pipe_error
svga_hwtnl_draw_arrays(struct svga_hwtnl * hwtnl,enum pipe_prim_type prim,unsigned start,unsigned count,unsigned start_instance,unsigned instance_count,ubyte vertices_per_patch)210 svga_hwtnl_draw_arrays(struct svga_hwtnl *hwtnl,
211 enum pipe_prim_type prim, unsigned start, unsigned count,
212 unsigned start_instance, unsigned instance_count,
213 ubyte vertices_per_patch)
214 {
215 enum pipe_prim_type gen_prim;
216 unsigned gen_size, gen_nr;
217 enum indices_mode gen_type;
218 u_generate_func gen_func;
219 enum pipe_error ret = PIPE_OK;
220 unsigned api_pv = hwtnl->api_pv;
221 struct svga_context *svga = hwtnl->svga;
222
223 SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_HWTNLDRAWARRAYS);
224
225 if (svga->curr.rast->templ.fill_front !=
226 svga->curr.rast->templ.fill_back) {
227 assert(hwtnl->api_fillmode == PIPE_POLYGON_MODE_FILL);
228 }
229
230 if (svga->curr.rast->templ.flatshade &&
231 svga_fs_variant(svga->state.hw_draw.fs)->constant_color_output) {
232 /* The fragment color is a constant, not per-vertex so the whole
233 * primitive will be the same color (except for possible blending).
234 * We can ignore the current provoking vertex state and use whatever
235 * the hardware wants.
236 */
237 api_pv = hwtnl->hw_pv;
238
239 if (hwtnl->api_fillmode == PIPE_POLYGON_MODE_FILL) {
240 /* Do some simple primitive conversions to avoid index buffer
241 * generation below. Note that polygons and quads are not directly
242 * supported by the svga device. Also note, we can only do this
243 * for flat/constant-colored rendering because of provoking vertex.
244 */
245 if (prim == PIPE_PRIM_POLYGON) {
246 prim = PIPE_PRIM_TRIANGLE_FAN;
247 }
248 else if (prim == PIPE_PRIM_QUADS && count == 4) {
249 prim = PIPE_PRIM_TRIANGLE_FAN;
250 }
251 }
252 }
253
254 if (svga_need_unfilled_fallback(hwtnl, prim)) {
255 /* Convert unfilled polygons into points, lines, triangles */
256 gen_type = u_unfilled_generator(prim,
257 start,
258 count,
259 hwtnl->api_fillmode,
260 &gen_prim,
261 &gen_size, &gen_nr, &gen_func);
262 }
263 else {
264 /* Convert PIPE_PRIM_LINE_LOOP to PIPE_PRIM_LINESTRIP,
265 * convert PIPE_PRIM_POLYGON to PIPE_PRIM_TRIANGLE_FAN,
266 * etc, if needed (as determined by svga_hw_prims mask).
267 */
268 gen_type = u_index_generator(svga_hw_prims,
269 prim,
270 start,
271 count,
272 api_pv,
273 hwtnl->hw_pv,
274 &gen_prim, &gen_size, &gen_nr, &gen_func);
275 }
276
277 if (gen_type == U_GENERATE_LINEAR) {
278 ret = simple_draw_arrays(hwtnl, gen_prim, start, count,
279 start_instance, instance_count,
280 vertices_per_patch);
281 }
282 else {
283 struct pipe_resource *gen_buf = NULL;
284
285 /* Need to draw as indexed primitive.
286 * Potentially need to run the gen func to build an index buffer.
287 */
288 ret = retrieve_or_generate_indices(hwtnl,
289 prim,
290 gen_type,
291 gen_nr,
292 gen_size, gen_func, &gen_buf);
293 if (ret == PIPE_OK) {
294 pipe_debug_message(&svga->debug.callback, PERF_INFO,
295 "generating temporary index buffer for drawing %s",
296 u_prim_name(prim));
297
298 ret = svga_hwtnl_simple_draw_range_elements(hwtnl,
299 gen_buf,
300 gen_size,
301 start,
302 0,
303 count - 1,
304 gen_prim, 0, gen_nr,
305 start_instance,
306 instance_count,
307 vertices_per_patch);
308 }
309
310 if (gen_buf) {
311 pipe_resource_reference(&gen_buf, NULL);
312 }
313 }
314
315 SVGA_STATS_TIME_POP(svga_sws(svga));
316 return ret;
317 }
318