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 "indices/u_indices.h" 30 31 #include "svga_hw_reg.h" 32 #include "svga_draw.h" 33 #include "svga_draw_private.h" 34 #include "svga_context.h" 35 36 37 #define DBG 0 38 39 40 41 42 static enum pipe_error generate_indices( struct svga_hwtnl *hwtnl, 43 unsigned nr, 44 unsigned index_size, 45 u_generate_func generate, 46 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, 55 PIPE_BIND_INDEX_BUFFER, 56 PIPE_USAGE_STATIC, 57 size ); 58 if (dst == NULL) 59 goto fail; 60 61 dst_map = pipe_buffer_map( pipe, dst, PIPE_TRANSFER_WRITE, 62 &transfer); 63 if (dst_map == NULL) 64 goto fail; 65 66 generate( nr, 67 dst_map ); 68 69 pipe_buffer_unmap( pipe, transfer ); 70 71 *out_buf = dst; 72 return PIPE_OK; 73 74 fail: 75 if (dst_map) 76 pipe_buffer_unmap( pipe, transfer ); 77 78 if (dst) 79 pipe->screen->resource_destroy( pipe->screen, dst ); 80 81 return PIPE_ERROR_OUT_OF_MEMORY; 82 } 83 84 static boolean compare( unsigned cached_nr, 85 unsigned nr, 86 unsigned type ) 87 { 88 if (type == U_GENERATE_REUSABLE) 89 return cached_nr >= nr; 90 else 91 return cached_nr == nr; 92 } 93 94 static enum pipe_error retrieve_or_generate_indices( struct svga_hwtnl *hwtnl, 95 unsigned prim, 96 unsigned gen_type, 97 unsigned gen_nr, 98 unsigned gen_size, 99 u_generate_func generate, 100 struct pipe_resource **out_buf ) 101 { 102 enum pipe_error ret = PIPE_OK; 103 int i; 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 { 109 if (compare(hwtnl->index_cache[prim][i].gen_nr, gen_nr, gen_type)) 110 { 111 pipe_resource_reference( out_buf, 112 hwtnl->index_cache[prim][i].buffer ); 113 114 if (DBG) 115 debug_printf("%s retrieve %d/%d\n", __FUNCTION__, i, gen_nr); 116 117 return PIPE_OK; 118 } 119 else if (gen_type == U_GENERATE_REUSABLE) 120 { 121 pipe_resource_reference( &hwtnl->index_cache[prim][i].buffer, 122 NULL ); 123 124 if (DBG) 125 debug_printf("%s discard %d/%d\n", __FUNCTION__, 126 i, hwtnl->index_cache[prim][i].gen_nr); 127 128 break; 129 } 130 } 131 } 132 133 if (i == IDX_CACHE_MAX) 134 { 135 unsigned smallest = 0; 136 unsigned smallest_size = ~0; 137 138 for (i = 0; i < IDX_CACHE_MAX && smallest_size; i++) { 139 if (hwtnl->index_cache[prim][i].buffer == NULL) 140 { 141 smallest = i; 142 smallest_size = 0; 143 } 144 else if (hwtnl->index_cache[prim][i].gen_nr < smallest) 145 { 146 smallest = i; 147 smallest_size = hwtnl->index_cache[prim][i].gen_nr; 148 } 149 } 150 151 assert (smallest != IDX_CACHE_MAX); 152 153 pipe_resource_reference( &hwtnl->index_cache[prim][smallest].buffer, 154 NULL ); 155 156 if (DBG) 157 debug_printf("%s discard smallest %d/%d\n", __FUNCTION__, 158 smallest, smallest_size); 159 160 i = smallest; 161 } 162 163 164 ret = generate_indices( hwtnl, 165 gen_nr, 166 gen_size, 167 generate, 168 out_buf ); 169 if (ret != PIPE_OK) 170 return ret; 171 172 173 hwtnl->index_cache[prim][i].generate = generate; 174 hwtnl->index_cache[prim][i].gen_nr = gen_nr; 175 pipe_resource_reference( &hwtnl->index_cache[prim][i].buffer, 176 *out_buf ); 177 178 if (DBG) 179 debug_printf("%s cache %d/%d\n", __FUNCTION__, 180 i, hwtnl->index_cache[prim][i].gen_nr); 181 182 return PIPE_OK; 183 } 184 185 186 187 static enum pipe_error 188 simple_draw_arrays( struct svga_hwtnl *hwtnl, 189 unsigned prim, unsigned start, unsigned count ) 190 { 191 SVGA3dPrimitiveRange range; 192 unsigned hw_prim; 193 unsigned hw_count; 194 195 hw_prim = svga_translate_prim(prim, count, &hw_count); 196 if (hw_count == 0) 197 return PIPE_ERROR_BAD_INPUT; 198 199 range.primType = hw_prim; 200 range.primitiveCount = hw_count; 201 range.indexArray.surfaceId = SVGA3D_INVALID_ID; 202 range.indexArray.offset = 0; 203 range.indexArray.stride = 0; 204 range.indexWidth = 0; 205 range.indexBias = start; 206 207 /* Min/max index should be calculated prior to applying bias, so we 208 * end up with min_index = 0, max_index = count - 1 and everybody 209 * looking at those numbers knows to adjust them by 210 * range.indexBias. 211 */ 212 return svga_hwtnl_prim( hwtnl, &range, 0, count - 1, NULL ); 213 } 214 215 216 217 218 219 220 221 222 223 224 enum pipe_error 225 svga_hwtnl_draw_arrays( struct svga_hwtnl *hwtnl, 226 unsigned prim, 227 unsigned start, 228 unsigned count) 229 { 230 unsigned gen_prim, gen_size, gen_nr, gen_type; 231 u_generate_func gen_func; 232 enum pipe_error ret = PIPE_OK; 233 234 if (hwtnl->api_fillmode != PIPE_POLYGON_MODE_FILL && 235 prim >= PIPE_PRIM_TRIANGLES) 236 { 237 gen_type = u_unfilled_generator( prim, 238 start, 239 count, 240 hwtnl->api_fillmode, 241 &gen_prim, 242 &gen_size, 243 &gen_nr, 244 &gen_func ); 245 } 246 else { 247 gen_type = u_index_generator( svga_hw_prims, 248 prim, 249 start, 250 count, 251 hwtnl->api_pv, 252 hwtnl->hw_pv, 253 &gen_prim, 254 &gen_size, 255 &gen_nr, 256 &gen_func ); 257 } 258 259 if (gen_type == U_GENERATE_LINEAR) { 260 return simple_draw_arrays( hwtnl, gen_prim, start, count ); 261 } 262 else { 263 struct pipe_resource *gen_buf = NULL; 264 265 /* Need to draw as indexed primitive. 266 * Potentially need to run the gen func to build an index buffer. 267 */ 268 ret = retrieve_or_generate_indices( hwtnl, 269 prim, 270 gen_type, 271 gen_nr, 272 gen_size, 273 gen_func, 274 &gen_buf ); 275 if (ret != PIPE_OK) 276 goto done; 277 278 ret = svga_hwtnl_simple_draw_range_elements( hwtnl, 279 gen_buf, 280 gen_size, 281 start, 282 0, 283 count - 1, 284 gen_prim, 285 0, 286 gen_nr ); 287 288 if (ret != PIPE_OK) 289 goto done; 290 291 done: 292 if (gen_buf) 293 pipe_resource_reference( &gen_buf, NULL ); 294 295 return ret; 296 } 297 } 298 299
