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 struct pt_so_emit {
44 struct draw_context *draw;
45
46 unsigned input_vertex_stride;
47 const float (*inputs)[4];
48 const float *pre_clip_pos;
49 boolean has_so;
50 boolean use_pre_clip_pos;
51 int pos_idx;
52 unsigned emitted_primitives;
53 unsigned generated_primitives;
54 unsigned stream;
55 };
56
57 static const struct pipe_stream_output_info *
draw_so_info(const struct draw_context * draw)58 draw_so_info(const struct draw_context *draw)
59 {
60 const struct pipe_stream_output_info *state = NULL;
61
62 if (draw->gs.geometry_shader) {
63 state = &draw->gs.geometry_shader->state.stream_output;
64 } else if (draw->tes.tess_eval_shader) {
65 state = &draw->tes.tess_eval_shader->state.stream_output;
66 } else {
67 state = &draw->vs.vertex_shader->state.stream_output;
68 }
69
70 return state;
71 }
72
73 static inline boolean
draw_has_so(const struct draw_context * draw)74 draw_has_so(const struct draw_context *draw)
75 {
76 const struct pipe_stream_output_info *state = draw_so_info(draw);
77
78 if (state && state->num_outputs > 0)
79 return TRUE;
80
81 return FALSE;
82 }
83
draw_pt_so_emit_prepare(struct pt_so_emit * emit,boolean use_pre_clip_pos)84 void draw_pt_so_emit_prepare(struct pt_so_emit *emit, boolean use_pre_clip_pos)
85 {
86 struct draw_context *draw = emit->draw;
87
88 emit->use_pre_clip_pos = use_pre_clip_pos;
89 emit->has_so = draw_has_so(draw);
90 if (use_pre_clip_pos)
91 emit->pos_idx = draw_current_shader_position_output(draw);
92
93 /* if we have a state with outputs make sure we have
94 * buffers to output to */
95 if (emit->has_so) {
96 boolean has_valid_buffer = FALSE;
97 unsigned i;
98 for (i = 0; i < draw->so.num_targets; ++i) {
99 if (draw->so.targets[i]) {
100 has_valid_buffer = TRUE;
101 break;
102 }
103 }
104 emit->has_so = has_valid_buffer;
105 }
106
107 if (!emit->has_so)
108 return;
109
110 /* XXX: need to flush to get prim_vbuf.c to release its allocation??
111 */
112 draw_do_flush( draw, DRAW_FLUSH_BACKEND );
113 }
114
so_emit_prim(struct pt_so_emit * so,unsigned * indices,unsigned num_vertices)115 static void so_emit_prim(struct pt_so_emit *so,
116 unsigned *indices,
117 unsigned num_vertices)
118 {
119 unsigned slot, i;
120 unsigned input_vertex_stride = so->input_vertex_stride;
121 struct draw_context *draw = so->draw;
122 const float (*input_ptr)[4];
123 const float *pcp_ptr = NULL;
124 const struct pipe_stream_output_info *state = draw_so_info(draw);
125 float *buffer;
126 int buffer_total_bytes[PIPE_MAX_SO_BUFFERS];
127 boolean buffer_written[PIPE_MAX_SO_BUFFERS] = {0};
128
129 input_ptr = so->inputs;
130 if (so->use_pre_clip_pos)
131 pcp_ptr = so->pre_clip_pos;
132
133 ++so->generated_primitives;
134
135 for (i = 0; i < draw->so.num_targets; i++) {
136 struct draw_so_target *target = draw->so.targets[i];
137 if (target) {
138 buffer_total_bytes[i] = target->internal_offset;
139 } else {
140 buffer_total_bytes[i] = 0;
141 }
142 }
143
144 /* check have we space to emit prim first - if not don't do anything */
145 for (i = 0; i < num_vertices; ++i) {
146 unsigned ob;
147 for (slot = 0; slot < state->num_outputs; ++slot) {
148 unsigned num_comps = state->output[slot].num_components;
149 int ob = state->output[slot].output_buffer;
150 unsigned dst_offset = state->output[slot].dst_offset * sizeof(float);
151 unsigned write_size = num_comps * sizeof(float);
152
153 if (state->output[slot].stream != so->stream)
154 continue;
155 /* If a buffer is missing then that's equivalent to
156 * an overflow */
157 if (!draw->so.targets[ob]) {
158 return;
159 }
160 if ((buffer_total_bytes[ob] + write_size + dst_offset) >
161 draw->so.targets[ob]->target.buffer_size) {
162 return;
163 }
164 }
165 for (ob = 0; ob < draw->so.num_targets; ++ob) {
166 buffer_total_bytes[ob] += state->stride[ob] * sizeof(float);
167 }
168 }
169
170 for (i = 0; i < num_vertices; ++i) {
171 const float (*input)[4];
172 const float *pre_clip_pos = NULL;
173 unsigned ob;
174
175 input = (const float (*)[4])(
176 (const char *)input_ptr + (indices[i] * input_vertex_stride));
177
178 if (pcp_ptr)
179 pre_clip_pos = (const float *)(
180 (const char *)pcp_ptr + (indices[i] * input_vertex_stride));
181
182 for (slot = 0; slot < state->num_outputs; ++slot) {
183 unsigned idx = state->output[slot].register_index;
184 unsigned start_comp = state->output[slot].start_component;
185 unsigned num_comps = state->output[slot].num_components;
186 unsigned stream = state->output[slot].stream;
187
188 if (stream != so->stream)
189 continue;
190 ob = state->output[slot].output_buffer;
191 buffer_written[ob] = TRUE;
192
193 buffer = (float *)((char *)draw->so.targets[ob]->mapping +
194 draw->so.targets[ob]->target.buffer_offset +
195 draw->so.targets[ob]->internal_offset) +
196 state->output[slot].dst_offset;
197
198 if (idx == so->pos_idx && pcp_ptr && so->stream == 0)
199 memcpy(buffer, &pre_clip_pos[start_comp],
200 num_comps * sizeof(float));
201 else
202 memcpy(buffer, &input[idx][start_comp],
203 num_comps * sizeof(float));
204 #if 0
205 {
206 int j;
207 debug_printf("VERT[%d], stream = %d, offset = %d, slot[%d] sc = %d, num_c = %d, idx = %d = [",
208 i, stream,
209 draw->so.targets[ob]->internal_offset,
210 slot, start_comp, num_comps, idx);
211 for (j = 0; j < num_comps; ++j) {
212 unsigned *ubuffer = (unsigned*)buffer;
213 debug_printf("%d (0x%x), ", ubuffer[j], ubuffer[j]);
214 }
215 debug_printf("]\n");
216 }
217 #endif
218 }
219 for (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
so_point(struct pt_so_emit * so,int idx)229 static void so_point(struct pt_so_emit *so, int idx)
230 {
231 unsigned indices[1];
232
233 indices[0] = idx;
234
235 so_emit_prim(so, indices, 1);
236 }
237
so_line(struct pt_so_emit * so,int i0,int i1)238 static void so_line(struct pt_so_emit *so, int i0, int i1)
239 {
240 unsigned indices[2];
241
242 indices[0] = i0;
243 indices[1] = i1;
244
245 so_emit_prim(so, indices, 2);
246 }
247
so_tri(struct pt_so_emit * so,int i0,int i1,int i2)248 static void so_tri(struct pt_so_emit *so, int i0, int i1, int i2)
249 {
250 unsigned indices[3];
251
252 indices[0] = i0;
253 indices[1] = i1;
254 indices[2] = i2;
255
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 ushort *elts = input_prims->elts;
267 #define GET_ELT(idx) (elts[start + (idx)])
268 #include "draw_so_emit_tmp.h"
269
270
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)271 void draw_pt_so_emit( struct pt_so_emit *emit,
272 int num_vertex_streams,
273 const struct draw_vertex_info *input_verts,
274 const struct draw_prim_info *input_prims )
275 {
276 struct draw_context *draw = emit->draw;
277 struct vbuf_render *render = draw->render;
278 unsigned start, i, stream;
279
280 if (!emit->has_so) {
281 if (draw->collect_primgen) {
282 unsigned i;
283 unsigned total = 0;
284 for (i = 0; i < input_prims->primitive_count; i++) {
285 total +=
286 u_decomposed_prims_for_vertices(input_prims->prim,
287 input_prims->primitive_lengths[i]);
288 }
289 render->set_stream_output_info(render,
290 0, 0, total);
291 }
292 return;
293 }
294
295 if (!draw->so.num_targets)
296 return;
297
298 /* XXX: need to flush to get prim_vbuf.c to release its allocation??*/
299 draw_do_flush( draw, DRAW_FLUSH_BACKEND );
300
301 for (stream = 0; stream < num_vertex_streams; stream++) {
302 emit->emitted_primitives = 0;
303 emit->generated_primitives = 0;
304 if (emit->use_pre_clip_pos)
305 emit->pre_clip_pos = input_verts[stream].verts->clip_pos;
306
307 emit->input_vertex_stride = input_verts[stream].stride;
308 emit->inputs = (const float (*)[4])input_verts[stream].verts->data;
309 emit->stream = stream;
310 for (start = i = 0; i < input_prims[stream].primitive_count;
311 start += input_prims[stream].primitive_lengths[i], i++)
312 {
313 unsigned count = input_prims[stream].primitive_lengths[i];
314
315 if (input_prims->linear) {
316 so_run_linear(emit, &input_prims[stream], &input_verts[stream],
317 start, count);
318 } else {
319 so_run_elts(emit, &input_prims[stream], &input_verts[stream],
320 start, count);
321 }
322 }
323 render->set_stream_output_info(render,
324 stream,
325 emit->emitted_primitives,
326 emit->generated_primitives);
327 }
328 }
329
330
draw_pt_so_emit_create(struct draw_context * draw)331 struct pt_so_emit *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
draw_pt_so_emit_destroy(struct pt_so_emit * emit)342 void draw_pt_so_emit_destroy( struct pt_so_emit *emit )
343 {
344 FREE(emit);
345 }
346