1 /**************************************************************************
3 * Copyright 2010 VMware, Inc.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
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"
36 #include "pipe/p_state.h"
38 #include "util/u_math.h"
39 #include "util/u_memory.h"
42 struct draw_context *draw;
44 unsigned input_vertex_stride;
45 const float (*inputs)[4];
46 const float *pre_clip_pos;
48 boolean use_pre_clip_pos;
50 unsigned emitted_primitives;
51 unsigned emitted_vertices;
52 unsigned generated_primitives;
55 static const struct pipe_stream_output_info *
56 draw_so_info(const struct draw_context *draw)
58 const struct pipe_stream_output_info *state = NULL;
60 if (draw->gs.geometry_shader) {
61 state = &draw->gs.geometry_shader->state.stream_output;
63 state = &draw->vs.vertex_shader->state.stream_output;
70 draw_has_so(const struct draw_context *draw)
72 const struct pipe_stream_output_info *state = draw_so_info(draw);
74 if (state && state->num_outputs > 0)
80 void draw_pt_so_emit_prepare(struct pt_so_emit *emit, boolean use_pre_clip_pos)
82 struct draw_context *draw = emit->draw;
84 emit->use_pre_clip_pos = use_pre_clip_pos;
85 emit->has_so = draw_has_so(draw);
87 emit->pos_idx = draw_current_shader_position_output(draw);
89 /* if we have a state with outputs make sure we have
90 * buffers to output to */
92 boolean has_valid_buffer = FALSE;
94 for (i = 0; i < draw->so.num_targets; ++i) {
95 if (draw->so.targets[i]) {
96 has_valid_buffer = TRUE;
100 emit->has_so = has_valid_buffer;
106 /* XXX: need to flush to get prim_vbuf.c to release its allocation??
108 draw_do_flush( draw, DRAW_FLUSH_BACKEND );
111 static void so_emit_prim(struct pt_so_emit *so,
113 unsigned num_vertices)
116 unsigned input_vertex_stride = so->input_vertex_stride;
117 struct draw_context *draw = so->draw;
118 const float (*input_ptr)[4];
119 const float *pcp_ptr = NULL;
120 const struct pipe_stream_output_info *state = draw_so_info(draw);
122 int buffer_total_bytes[PIPE_MAX_SO_BUFFERS];
123 boolean buffer_written[PIPE_MAX_SO_BUFFERS] = {0};
125 input_ptr = so->inputs;
126 if (so->use_pre_clip_pos)
127 pcp_ptr = so->pre_clip_pos;
129 ++so->generated_primitives;
131 for (i = 0; i < draw->so.num_targets; i++) {
132 struct draw_so_target *target = draw->so.targets[i];
134 buffer_total_bytes[i] = target->internal_offset +
135 target->target.buffer_offset;
137 buffer_total_bytes[i] = 0;
141 /* check have we space to emit prim first - if not don't do anything */
142 for (i = 0; i < num_vertices; ++i) {
144 for (slot = 0; slot < state->num_outputs; ++slot) {
145 unsigned num_comps = state->output[slot].num_components;
146 int ob = state->output[slot].output_buffer;
147 unsigned dst_offset = state->output[slot].dst_offset * sizeof(float);
148 unsigned write_size = num_comps * sizeof(float);
149 /* If a buffer is missing then that's equivalent to
151 if (!draw->so.targets[ob]) {
154 if ((buffer_total_bytes[ob] + write_size + dst_offset) >
155 draw->so.targets[ob]->target.buffer_size) {
159 for (ob = 0; ob < draw->so.num_targets; ++ob) {
160 buffer_total_bytes[ob] += state->stride[ob] * sizeof(float);
164 for (i = 0; i < num_vertices; ++i) {
165 const float (*input)[4];
166 const float *pre_clip_pos = NULL;
169 input = (const float (*)[4])(
170 (const char *)input_ptr + (indices[i] * input_vertex_stride));
173 pre_clip_pos = (const float *)(
174 (const char *)pcp_ptr + (indices[i] * input_vertex_stride));
176 for (slot = 0; slot < state->num_outputs; ++slot) {
177 unsigned idx = state->output[slot].register_index;
178 unsigned start_comp = state->output[slot].start_component;
179 unsigned num_comps = state->output[slot].num_components;
181 ob = state->output[slot].output_buffer;
182 buffer_written[ob] = TRUE;
184 buffer = (float *)((char *)draw->so.targets[ob]->mapping +
185 draw->so.targets[ob]->target.buffer_offset +
186 draw->so.targets[ob]->internal_offset) + state->output[slot].dst_offset;
188 if (idx == so->pos_idx && pcp_ptr)
189 memcpy(buffer, &pre_clip_pos[start_comp], num_comps * sizeof(float));
191 memcpy(buffer, &input[idx][start_comp], num_comps * sizeof(float));
193 for (ob = 0; ob < draw->so.num_targets; ++ob) {
194 struct draw_so_target *target = draw->so.targets[ob];
195 if (target && buffer_written[ob]) {
196 target->internal_offset += state->stride[ob] * sizeof(float);
197 target->emitted_vertices += 1;
201 so->emitted_vertices += num_vertices;
202 ++so->emitted_primitives;
205 static void so_point(struct pt_so_emit *so, int idx)
211 so_emit_prim(so, indices, 1);
214 static void so_line(struct pt_so_emit *so, int i0, int i1)
221 so_emit_prim(so, indices, 2);
224 static void so_tri(struct pt_so_emit *so, int i0, int i1, int i2)
232 so_emit_prim(so, indices, 3);
236 #define FUNC so_run_linear
237 #define GET_ELT(idx) (start + (idx))
238 #include "draw_so_emit_tmp.h"
241 #define FUNC so_run_elts
242 #define LOCAL_VARS const ushort *elts = input_prims->elts;
243 #define GET_ELT(idx) (elts[start + (idx)])
244 #include "draw_so_emit_tmp.h"
247 void draw_pt_so_emit( struct pt_so_emit *emit,
248 const struct draw_vertex_info *input_verts,
249 const struct draw_prim_info *input_prims )
251 struct draw_context *draw = emit->draw;
252 struct vbuf_render *render = draw->render;
258 if (!draw->so.num_targets)
261 emit->emitted_vertices = 0;
262 emit->emitted_primitives = 0;
263 emit->generated_primitives = 0;
264 emit->input_vertex_stride = input_verts->stride;
265 if (emit->use_pre_clip_pos)
266 emit->pre_clip_pos = input_verts->verts->pre_clip_pos;
268 emit->inputs = (const float (*)[4])input_verts->verts->data;
270 /* XXX: need to flush to get prim_vbuf.c to release its allocation??*/
271 draw_do_flush( draw, DRAW_FLUSH_BACKEND );
273 for (start = i = 0; i < input_prims->primitive_count;
274 start += input_prims->primitive_lengths[i], i++)
276 unsigned count = input_prims->primitive_lengths[i];
278 if (input_prims->linear) {
279 so_run_linear(emit, input_prims, input_verts,
282 so_run_elts(emit, input_prims, input_verts,
287 render->set_stream_output_info(render,
288 emit->emitted_primitives,
289 emit->emitted_vertices,
290 emit->generated_primitives);
294 struct pt_so_emit *draw_pt_so_emit_create( struct draw_context *draw )
296 struct pt_so_emit *emit = CALLOC_STRUCT(pt_so_emit);
305 void draw_pt_so_emit_destroy( struct pt_so_emit *emit )