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 "indices/u_indices.h"
29 #include "util/u_inlines.h"
30 #include "util/u_prim.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_MAP_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", __func__, 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", __func__,
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", __func__,
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", __func__,
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,
179 ubyte vertices_per_patch)
181 SVGA3dPrimitiveRange range;
185 hw_prim = svga_translate_prim(prim, count, &hw_count, vertices_per_patch);
187 return PIPE_ERROR_BAD_INPUT;
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;
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
202 return svga_hwtnl_prim(hwtnl, &range, count,
204 start_instance, instance_count,
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)
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;
223 SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_HWTNLDRAWARRAYS);
225 if (svga->curr.rast->templ.fill_front !=
226 svga->curr.rast->templ.fill_back) {
227 assert(hwtnl->api_fillmode == PIPE_POLYGON_MODE_FILL);
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.
237 api_pv = hwtnl->hw_pv;
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.
245 if (prim == PIPE_PRIM_POLYGON) {
246 prim = PIPE_PRIM_TRIANGLE_FAN;
248 else if (prim == PIPE_PRIM_QUADS && count == 4) {
249 prim = PIPE_PRIM_TRIANGLE_FAN;
254 if (svga_need_unfilled_fallback(hwtnl, prim)) {
255 /* Convert unfilled polygons into points, lines, triangles */
256 gen_type = u_unfilled_generator(prim,
261 &gen_size, &gen_nr, &gen_func);
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).
268 gen_type = u_index_generator(svga_hw_prims,
274 &gen_prim, &gen_size, &gen_nr, &gen_func);
277 if (gen_type == U_GENERATE_LINEAR) {
278 ret = simple_draw_arrays(hwtnl, gen_prim, start, count,
279 start_instance, instance_count,
283 struct pipe_resource *gen_buf = NULL;
285 /* Need to draw as indexed primitive.
286 * Potentially need to run the gen func to build an index buffer.
288 ret = retrieve_or_generate_indices(hwtnl,
292 gen_size, gen_func, &gen_buf);
293 if (ret == PIPE_OK) {
294 util_debug_message(&svga->debug.callback, PERF_INFO,
295 "generating temporary index buffer for drawing %s",
298 ret = svga_hwtnl_simple_draw_range_elements(hwtnl,
311 pipe_resource_reference(&gen_buf, NULL);
315 SVGA_STATS_TIME_POP(svga_sws(svga));