1 /**************************************************************************
2 *
3 * Copyright 2010 VMware, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 #include "draw/draw_private.h"
29 #include "draw/draw_vs.h"
30 #include "draw/draw_gs.h"
31 #include "draw/draw_tess.h"
32 #include "draw/draw_context.h"
33 #include "draw/draw_vbuf.h"
34 #include "draw/draw_vertex.h"
35 #include "draw/draw_pt.h"
36
37 #include "pipe/p_state.h"
38
39 #include "util/u_math.h"
40 #include "util/u_prim.h"
41 #include "util/u_memory.h"
42
43
44 struct pt_so_emit {
45 struct draw_context *draw;
46
47 unsigned input_vertex_stride;
48 const float (*inputs)[4];
49 const float *pre_clip_pos;
50 bool has_so;
51 bool use_pre_clip_pos;
52 int pos_idx;
53 unsigned emitted_primitives;
54 unsigned generated_primitives;
55 unsigned stream;
56 };
57
58
59 static const struct pipe_stream_output_info *
draw_so_info(const struct draw_context * draw)60 draw_so_info(const struct draw_context *draw)
61 {
62 const struct pipe_stream_output_info *state = NULL;
63
64 if (draw->ms.mesh_shader)
65 return state;
66 if (draw->gs.geometry_shader) {
67 state = &draw->gs.geometry_shader->state.stream_output;
68 } else if (draw->tes.tess_eval_shader) {
69 state = &draw->tes.tess_eval_shader->state.stream_output;
70 } else {
71 state = &draw->vs.vertex_shader->state.stream_output;
72 }
73
74 return state;
75 }
76
77 static inline bool
draw_has_so(const struct draw_context * draw)78 draw_has_so(const struct draw_context *draw)
79 {
80 const struct pipe_stream_output_info *state = draw_so_info(draw);
81
82 if (state && state->num_outputs > 0)
83 return true;
84
85 return false;
86 }
87
88 void
draw_pt_so_emit_prepare(struct pt_so_emit * emit,bool use_pre_clip_pos)89 draw_pt_so_emit_prepare(struct pt_so_emit *emit, bool use_pre_clip_pos)
90 {
91 struct draw_context *draw = emit->draw;
92
93 emit->use_pre_clip_pos = use_pre_clip_pos;
94 emit->has_so = draw_has_so(draw);
95 if (use_pre_clip_pos)
96 emit->pos_idx = draw_current_shader_position_output(draw);
97
98 /* if we have a state with outputs make sure we have
99 * buffers to output to */
100 if (emit->has_so) {
101 bool has_valid_buffer = false;
102 for (unsigned i = 0; i < draw->so.num_targets; ++i) {
103 if (draw->so.targets[i]) {
104 has_valid_buffer = true;
105 break;
106 }
107 }
108 emit->has_so = has_valid_buffer;
109 }
110
111 if (!emit->has_so)
112 return;
113
114 /* XXX: need to flush to get prim_vbuf.c to release its allocation??
115 */
116 draw_do_flush(draw, DRAW_FLUSH_BACKEND);
117 }
118
119
120 static void
so_emit_prim(struct pt_so_emit * so,unsigned * indices,unsigned num_vertices)121 so_emit_prim(struct pt_so_emit *so,
122 unsigned *indices,
123 unsigned num_vertices)
124 {
125 unsigned input_vertex_stride = so->input_vertex_stride;
126 struct draw_context *draw = so->draw;
127 const float (*input_ptr)[4];
128 const float *pcp_ptr = NULL;
129 const struct pipe_stream_output_info *state = draw_so_info(draw);
130 int buffer_total_bytes[PIPE_MAX_SO_BUFFERS];
131 bool buffer_written[PIPE_MAX_SO_BUFFERS] = {0};
132
133 input_ptr = so->inputs;
134 if (so->use_pre_clip_pos)
135 pcp_ptr = so->pre_clip_pos;
136
137 ++so->generated_primitives;
138
139 for (unsigned i = 0; i < draw->so.num_targets; i++) {
140 struct draw_so_target *target = draw->so.targets[i];
141 if (target) {
142 buffer_total_bytes[i] = target->internal_offset;
143 } else {
144 buffer_total_bytes[i] = 0;
145 }
146 }
147
148 /* check have we space to emit prim first - if not don't do anything */
149 for (unsigned slot = 0; slot < state->num_outputs; ++slot) {
150 int ob = state->output[slot].output_buffer;
151
152 if (state->output[slot].stream != so->stream)
153 continue;
154 /* If a buffer is missing then that's equivalent to an overflow */
155 if (!draw->so.targets[ob]) {
156 return;
157 }
158 buffer_written[ob] = true;
159 }
160 for (unsigned ob = 0; ob < draw->so.num_targets; ++ob) {
161 if (buffer_written[ob]) {
162 unsigned size_req = num_vertices * state->stride[ob] * sizeof(float);
163 if (buffer_total_bytes[ob] + size_req > draw->so.targets[ob]->target.buffer_size) {
164 return;
165 }
166 }
167 }
168
169 for (unsigned i = 0; i < num_vertices; ++i) {
170 const float (*input)[4];
171 const float *pre_clip_pos = NULL;
172
173 input = (const float (*)[4])(
174 (const char *)input_ptr + (indices[i] * input_vertex_stride));
175
176 if (pcp_ptr)
177 pre_clip_pos = (const float *)(
178 (const char *)pcp_ptr + (indices[i] * input_vertex_stride));
179
180 for (unsigned slot = 0; slot < state->num_outputs; ++slot) {
181 unsigned idx = state->output[slot].register_index;
182 unsigned start_comp = state->output[slot].start_component;
183 unsigned num_comps = state->output[slot].num_components;
184 unsigned stream = state->output[slot].stream;
185
186 if (stream != so->stream)
187 continue;
188
189 unsigned ob = state->output[slot].output_buffer;
190
191 float *buffer = (float *)((char *)draw->so.targets[ob]->mapping +
192 draw->so.targets[ob]->target.buffer_offset +
193 draw->so.targets[ob]->internal_offset) +
194 state->output[slot].dst_offset;
195
196 if (idx == so->pos_idx && pcp_ptr && so->stream == 0) {
197 memcpy(buffer, &pre_clip_pos[start_comp],
198 num_comps * sizeof(float));
199 } else {
200 memcpy(buffer, &input[idx][start_comp],
201 num_comps * sizeof(float));
202 }
203
204 #if 0
205 {
206 debug_printf("VERT[%d], stream = %d, offset = %d, slot[%d] sc = %d, num_c = %d, idx = %d = [",
207 i, stream,
208 draw->so.targets[ob]->internal_offset + (4 * state->output[slot].dst_offset),
209 slot, start_comp, num_comps, idx);
210 for (unsigned j = 0; j < num_comps; ++j) {
211 unsigned *ubuffer = (unsigned*)buffer;
212 debug_printf("%d (0x%x), ", ubuffer[j], ubuffer[j]);
213 }
214 debug_printf("]\n");
215 }
216 #endif
217 }
218
219 for (unsigned ob = 0; ob < draw->so.num_targets; ++ob) {
220 struct draw_so_target *target = draw->so.targets[ob];
221 if (target && buffer_written[ob]) {
222 target->internal_offset += state->stride[ob] * sizeof(float);
223 }
224 }
225 }
226 ++so->emitted_primitives;
227 }
228
229
230 static void
so_point(struct pt_so_emit * so,int idx)231 so_point(struct pt_so_emit *so, int idx)
232 {
233 unsigned indices[1];
234 indices[0] = idx;
235 so_emit_prim(so, indices, 1);
236 }
237
238
239 static void
so_line(struct pt_so_emit * so,int i0,int i1)240 so_line(struct pt_so_emit *so, int i0, int i1)
241 {
242 unsigned indices[2];
243 indices[0] = i0;
244 indices[1] = i1;
245 so_emit_prim(so, indices, 2);
246 }
247
248
249 static void
so_tri(struct pt_so_emit * so,int i0,int i1,int i2)250 so_tri(struct pt_so_emit *so, int i0, int i1, int i2)
251 {
252 unsigned indices[3];
253 indices[0] = i0;
254 indices[1] = i1;
255 indices[2] = i2;
256 so_emit_prim(so, indices, 3);
257 }
258
259
260 #define FUNC so_run_linear
261 #define GET_ELT(idx) (start + (idx))
262 #include "draw_so_emit_tmp.h"
263
264
265 #define FUNC so_run_elts
266 #define LOCAL_VARS const uint16_t *elts = input_prims->elts;
267 #define GET_ELT(idx) (elts[start + (idx)])
268 #include "draw_so_emit_tmp.h"
269
270
271 void
draw_pt_so_emit(struct pt_so_emit * emit,int num_vertex_streams,const struct draw_vertex_info * input_verts,const struct draw_prim_info * input_prims)272 draw_pt_so_emit(struct pt_so_emit *emit,
273 int num_vertex_streams,
274 const struct draw_vertex_info *input_verts,
275 const struct draw_prim_info *input_prims)
276 {
277 struct draw_context *draw = emit->draw;
278 struct vbuf_render *render = draw->render;
279
280 if (!emit->has_so && num_vertex_streams == 1) {
281 if (draw->collect_primgen) {
282 unsigned total = 0;
283 for (unsigned i = 0; i < input_prims->primitive_count; i++) {
284 total +=
285 u_decomposed_prims_for_vertices(input_prims->prim,
286 input_prims->primitive_lengths[i]);
287 }
288 render->set_stream_output_info(render, 0, 0, total);
289 }
290 return;
291 }
292
293 if (!emit->has_so && !draw->collect_primgen)
294 return;
295
296 /* XXX: need to flush to get prim_vbuf.c to release its allocation??*/
297 draw_do_flush(draw, DRAW_FLUSH_BACKEND);
298
299 for (unsigned stream = 0; stream < num_vertex_streams; stream++) {
300 emit->emitted_primitives = 0;
301 emit->generated_primitives = 0;
302 if (emit->use_pre_clip_pos)
303 emit->pre_clip_pos = input_verts[stream].verts->clip_pos;
304
305 emit->input_vertex_stride = input_verts[stream].stride;
306 emit->inputs = (const float (*)[4])input_verts[stream].verts->data;
307 emit->stream = stream;
308
309 unsigned start, i;
310 for (start = i = 0; i < input_prims[stream].primitive_count;
311 start += input_prims[stream].primitive_lengths[i], i++) {
312 unsigned count = input_prims[stream].primitive_lengths[i];
313
314 if (input_prims->linear) {
315 so_run_linear(emit, &input_prims[stream], &input_verts[stream],
316 start, count);
317 } else {
318 so_run_elts(emit, &input_prims[stream], &input_verts[stream],
319 start, count);
320 }
321 }
322 render->set_stream_output_info(render,
323 stream,
324 emit->has_so ? emit->emitted_primitives : 0,
325 emit->generated_primitives);
326 }
327 }
328
329
330 struct pt_so_emit *
draw_pt_so_emit_create(struct draw_context * draw)331 draw_pt_so_emit_create(struct draw_context *draw)
332 {
333 struct pt_so_emit *emit = CALLOC_STRUCT(pt_so_emit);
334 if (!emit)
335 return NULL;
336
337 emit->draw = draw;
338
339 return emit;
340 }
341
342
343 void
draw_pt_so_emit_destroy(struct pt_so_emit * emit)344 draw_pt_so_emit_destroy(struct pt_so_emit *emit)
345 {
346 FREE(emit);
347 }
348