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_context.h"
32 #include "draw/draw_vbuf.h"
33 #include "draw/draw_vertex.h"
34 #include "draw/draw_pt.h"
35
36 #include "pipe/p_state.h"
37
38 #include "util/u_math.h"
39 #include "util/u_memory.h"
40
41 struct pt_so_emit {
42 struct draw_context *draw;
43
44 unsigned input_vertex_stride;
45 const float (*inputs)[4];
46 const float *pre_clip_pos;
47 boolean has_so;
48 boolean use_pre_clip_pos;
49 int pos_idx;
50 unsigned emitted_primitives;
51 unsigned generated_primitives;
52 };
53
54 static const struct pipe_stream_output_info *
draw_so_info(const struct draw_context * draw)55 draw_so_info(const struct draw_context *draw)
56 {
57 const struct pipe_stream_output_info *state = NULL;
58
59 if (draw->gs.geometry_shader) {
60 state = &draw->gs.geometry_shader->state.stream_output;
61 } else {
62 state = &draw->vs.vertex_shader->state.stream_output;
63 }
64
65 return state;
66 }
67
68 static inline boolean
draw_has_so(const struct draw_context * draw)69 draw_has_so(const struct draw_context *draw)
70 {
71 const struct pipe_stream_output_info *state = draw_so_info(draw);
72
73 if (state && state->num_outputs > 0)
74 return TRUE;
75
76 return FALSE;
77 }
78
draw_pt_so_emit_prepare(struct pt_so_emit * emit,boolean use_pre_clip_pos)79 void draw_pt_so_emit_prepare(struct pt_so_emit *emit, boolean use_pre_clip_pos)
80 {
81 struct draw_context *draw = emit->draw;
82
83 emit->use_pre_clip_pos = use_pre_clip_pos;
84 emit->has_so = draw_has_so(draw);
85 if (use_pre_clip_pos)
86 emit->pos_idx = draw_current_shader_position_output(draw);
87
88 /* if we have a state with outputs make sure we have
89 * buffers to output to */
90 if (emit->has_so) {
91 boolean has_valid_buffer = FALSE;
92 unsigned i;
93 for (i = 0; i < draw->so.num_targets; ++i) {
94 if (draw->so.targets[i]) {
95 has_valid_buffer = TRUE;
96 break;
97 }
98 }
99 emit->has_so = has_valid_buffer;
100 }
101
102 if (!emit->has_so)
103 return;
104
105 /* XXX: need to flush to get prim_vbuf.c to release its allocation??
106 */
107 draw_do_flush( draw, DRAW_FLUSH_BACKEND );
108 }
109
so_emit_prim(struct pt_so_emit * so,unsigned * indices,unsigned num_vertices)110 static void so_emit_prim(struct pt_so_emit *so,
111 unsigned *indices,
112 unsigned num_vertices)
113 {
114 unsigned slot, i;
115 unsigned input_vertex_stride = so->input_vertex_stride;
116 struct draw_context *draw = so->draw;
117 const float (*input_ptr)[4];
118 const float *pcp_ptr = NULL;
119 const struct pipe_stream_output_info *state = draw_so_info(draw);
120 float *buffer;
121 int buffer_total_bytes[PIPE_MAX_SO_BUFFERS];
122 boolean buffer_written[PIPE_MAX_SO_BUFFERS] = {0};
123
124 input_ptr = so->inputs;
125 if (so->use_pre_clip_pos)
126 pcp_ptr = so->pre_clip_pos;
127
128 ++so->generated_primitives;
129
130 for (i = 0; i < draw->so.num_targets; i++) {
131 struct draw_so_target *target = draw->so.targets[i];
132 if (target) {
133 buffer_total_bytes[i] = target->internal_offset;
134 } else {
135 buffer_total_bytes[i] = 0;
136 }
137 }
138
139 /* check have we space to emit prim first - if not don't do anything */
140 for (i = 0; i < num_vertices; ++i) {
141 unsigned ob;
142 for (slot = 0; slot < state->num_outputs; ++slot) {
143 unsigned num_comps = state->output[slot].num_components;
144 int ob = state->output[slot].output_buffer;
145 unsigned dst_offset = state->output[slot].dst_offset * sizeof(float);
146 unsigned write_size = num_comps * sizeof(float);
147 /* If a buffer is missing then that's equivalent to
148 * an overflow */
149 if (!draw->so.targets[ob]) {
150 return;
151 }
152 if ((buffer_total_bytes[ob] + write_size + dst_offset) >
153 draw->so.targets[ob]->target.buffer_size) {
154 return;
155 }
156 }
157 for (ob = 0; ob < draw->so.num_targets; ++ob) {
158 buffer_total_bytes[ob] += state->stride[ob] * sizeof(float);
159 }
160 }
161
162 for (i = 0; i < num_vertices; ++i) {
163 const float (*input)[4];
164 const float *pre_clip_pos = NULL;
165 unsigned ob;
166
167 input = (const float (*)[4])(
168 (const char *)input_ptr + (indices[i] * input_vertex_stride));
169
170 if (pcp_ptr)
171 pre_clip_pos = (const float *)(
172 (const char *)pcp_ptr + (indices[i] * input_vertex_stride));
173
174 for (slot = 0; slot < state->num_outputs; ++slot) {
175 unsigned idx = state->output[slot].register_index;
176 unsigned start_comp = state->output[slot].start_component;
177 unsigned num_comps = state->output[slot].num_components;
178
179 ob = state->output[slot].output_buffer;
180 buffer_written[ob] = TRUE;
181
182 buffer = (float *)((char *)draw->so.targets[ob]->mapping +
183 draw->so.targets[ob]->target.buffer_offset +
184 draw->so.targets[ob]->internal_offset) +
185 state->output[slot].dst_offset;
186
187 if (idx == so->pos_idx && pcp_ptr)
188 memcpy(buffer, &pre_clip_pos[start_comp],
189 num_comps * sizeof(float));
190 else
191 memcpy(buffer, &input[idx][start_comp],
192 num_comps * sizeof(float));
193 #if 0
194 {
195 int j;
196 debug_printf("VERT[%d], offset = %d, slot[%d] sc = %d, num_c = %d, idx = %d = [",
197 i,
198 draw->so.targets[ob]->internal_offset,
199 slot, start_comp, num_comps, idx);
200 for (j = 0; j < num_comps; ++j) {
201 unsigned *ubuffer = (unsigned*)buffer;
202 debug_printf("%d (0x%x), ", ubuffer[j], ubuffer[j]);
203 }
204 debug_printf("]\n");
205 }
206 #endif
207 }
208 for (ob = 0; ob < draw->so.num_targets; ++ob) {
209 struct draw_so_target *target = draw->so.targets[ob];
210 if (target && buffer_written[ob]) {
211 target->internal_offset += state->stride[ob] * sizeof(float);
212 }
213 }
214 }
215 ++so->emitted_primitives;
216 }
217
so_point(struct pt_so_emit * so,int idx)218 static void so_point(struct pt_so_emit *so, int idx)
219 {
220 unsigned indices[1];
221
222 indices[0] = idx;
223
224 so_emit_prim(so, indices, 1);
225 }
226
so_line(struct pt_so_emit * so,int i0,int i1)227 static void so_line(struct pt_so_emit *so, int i0, int i1)
228 {
229 unsigned indices[2];
230
231 indices[0] = i0;
232 indices[1] = i1;
233
234 so_emit_prim(so, indices, 2);
235 }
236
so_tri(struct pt_so_emit * so,int i0,int i1,int i2)237 static void so_tri(struct pt_so_emit *so, int i0, int i1, int i2)
238 {
239 unsigned indices[3];
240
241 indices[0] = i0;
242 indices[1] = i1;
243 indices[2] = i2;
244
245 so_emit_prim(so, indices, 3);
246 }
247
248
249 #define FUNC so_run_linear
250 #define GET_ELT(idx) (start + (idx))
251 #include "draw_so_emit_tmp.h"
252
253
254 #define FUNC so_run_elts
255 #define LOCAL_VARS const ushort *elts = input_prims->elts;
256 #define GET_ELT(idx) (elts[start + (idx)])
257 #include "draw_so_emit_tmp.h"
258
259
draw_pt_so_emit(struct pt_so_emit * emit,const struct draw_vertex_info * input_verts,const struct draw_prim_info * input_prims)260 void draw_pt_so_emit( struct pt_so_emit *emit,
261 const struct draw_vertex_info *input_verts,
262 const struct draw_prim_info *input_prims )
263 {
264 struct draw_context *draw = emit->draw;
265 struct vbuf_render *render = draw->render;
266 unsigned start, i;
267
268 if (!emit->has_so)
269 return;
270
271 if (!draw->so.num_targets)
272 return;
273
274 emit->emitted_primitives = 0;
275 emit->generated_primitives = 0;
276 emit->input_vertex_stride = input_verts->stride;
277 if (emit->use_pre_clip_pos)
278 emit->pre_clip_pos = input_verts->verts->clip_pos;
279
280 emit->inputs = (const float (*)[4])input_verts->verts->data;
281
282 /* XXX: need to flush to get prim_vbuf.c to release its allocation??*/
283 draw_do_flush( draw, DRAW_FLUSH_BACKEND );
284
285 for (start = i = 0; i < input_prims->primitive_count;
286 start += input_prims->primitive_lengths[i], i++)
287 {
288 unsigned count = input_prims->primitive_lengths[i];
289
290 if (input_prims->linear) {
291 so_run_linear(emit, input_prims, input_verts,
292 start, count);
293 } else {
294 so_run_elts(emit, input_prims, input_verts,
295 start, count);
296 }
297 }
298
299 render->set_stream_output_info(render,
300 emit->emitted_primitives,
301 emit->generated_primitives);
302 }
303
304
draw_pt_so_emit_create(struct draw_context * draw)305 struct pt_so_emit *draw_pt_so_emit_create( struct draw_context *draw )
306 {
307 struct pt_so_emit *emit = CALLOC_STRUCT(pt_so_emit);
308 if (!emit)
309 return NULL;
310
311 emit->draw = draw;
312
313 return emit;
314 }
315
draw_pt_so_emit_destroy(struct pt_so_emit * emit)316 void draw_pt_so_emit_destroy( struct pt_so_emit *emit )
317 {
318 FREE(emit);
319 }
320