1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul 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 "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Keith Whitwell <keithw@vmware.com>
26 */
27
28 #include <stdbool.h>
29 #include <stdio.h>
30 #include "main/glheader.h"
31 #include "main/bufferobj.h"
32 #include "main/compiler.h"
33 #include "main/context.h"
34 #include "main/enums.h"
35 #include "main/state.h"
36 #include "main/vtxfmt.h"
37
38 #include "vbo_context.h"
39 #include "vbo_noop.h"
40
41
42 static void
vbo_exec_debug_verts(struct vbo_exec_context * exec)43 vbo_exec_debug_verts( struct vbo_exec_context *exec )
44 {
45 GLuint count = exec->vtx.vert_count;
46 GLuint i;
47
48 printf("%s: %u vertices %d primitives, %d vertsize\n",
49 __func__,
50 count,
51 exec->vtx.prim_count,
52 exec->vtx.vertex_size);
53
54 for (i = 0 ; i < exec->vtx.prim_count ; i++) {
55 struct _mesa_prim *prim = &exec->vtx.prim[i];
56 printf(" prim %d: %s%s %d..%d %s %s\n",
57 i,
58 _mesa_lookup_prim_by_nr(prim->mode),
59 prim->weak ? " (weak)" : "",
60 prim->start,
61 prim->start + prim->count,
62 prim->begin ? "BEGIN" : "(wrap)",
63 prim->end ? "END" : "(wrap)");
64 }
65 }
66
67
68 /**
69 * Copy zero, one or two vertices from the current vertex buffer into
70 * the temporary "copy" buffer.
71 * This is used when a single primitive overflows a vertex buffer and
72 * we need to continue the primitive in a new vertex buffer.
73 * The temporary "copy" buffer holds the vertices which need to get
74 * copied from the old buffer to the new one.
75 */
76 static GLuint
vbo_copy_vertices(struct vbo_exec_context * exec)77 vbo_copy_vertices( struct vbo_exec_context *exec )
78 {
79 struct _mesa_prim *last_prim = &exec->vtx.prim[exec->vtx.prim_count - 1];
80 const GLuint nr = last_prim->count;
81 GLuint ovf, i;
82 const GLuint sz = exec->vtx.vertex_size;
83 fi_type *dst = exec->vtx.copied.buffer;
84 const fi_type *src = exec->vtx.buffer_map + last_prim->start * sz;
85
86 switch (exec->ctx->Driver.CurrentExecPrimitive) {
87 case GL_POINTS:
88 return 0;
89 case GL_LINES:
90 ovf = nr&1;
91 for (i = 0 ; i < ovf ; i++)
92 memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
93 return i;
94 case GL_TRIANGLES:
95 ovf = nr%3;
96 for (i = 0 ; i < ovf ; i++)
97 memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
98 return i;
99 case GL_QUADS:
100 ovf = nr&3;
101 for (i = 0 ; i < ovf ; i++)
102 memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
103 return i;
104 case GL_LINE_STRIP:
105 if (nr == 0) {
106 return 0;
107 }
108 else {
109 memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
110 return 1;
111 }
112 case GL_LINE_LOOP:
113 if (last_prim->begin == 0) {
114 /* We're dealing with the second or later section of a split/wrapped
115 * GL_LINE_LOOP. Since we're converting line loops to line strips,
116 * we've already increment the last_prim->start counter by one to
117 * skip the 0th vertex in the loop. We need to undo that (effectively
118 * subtract one from last_prim->start) so that we copy the 0th vertex
119 * to the next vertex buffer.
120 */
121 assert(last_prim->start > 0);
122 src -= sz;
123 }
124 /* fall-through */
125 case GL_TRIANGLE_FAN:
126 case GL_POLYGON:
127 if (nr == 0) {
128 return 0;
129 }
130 else if (nr == 1) {
131 memcpy( dst, src+0, sz * sizeof(GLfloat) );
132 return 1;
133 }
134 else {
135 memcpy( dst, src+0, sz * sizeof(GLfloat) );
136 memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
137 return 2;
138 }
139 case GL_TRIANGLE_STRIP:
140 /* no parity issue, but need to make sure the tri is not drawn twice */
141 if (nr & 1) {
142 last_prim->count--;
143 }
144 /* fallthrough */
145 case GL_QUAD_STRIP:
146 switch (nr) {
147 case 0:
148 ovf = 0;
149 break;
150 case 1:
151 ovf = 1;
152 break;
153 default:
154 ovf = 2 + (nr & 1);
155 break;
156 }
157 for (i = 0 ; i < ovf ; i++)
158 memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
159 return i;
160 case PRIM_OUTSIDE_BEGIN_END:
161 return 0;
162 default:
163 assert(0);
164 return 0;
165 }
166 }
167
168
169
170 /* TODO: populate these as the vertex is defined:
171 */
172 static void
vbo_exec_bind_arrays(struct gl_context * ctx)173 vbo_exec_bind_arrays( struct gl_context *ctx )
174 {
175 struct vbo_context *vbo = vbo_context(ctx);
176 struct vbo_exec_context *exec = &vbo->exec;
177 struct gl_vertex_array *arrays = exec->vtx.arrays;
178 const GLuint *map;
179 GLuint attr;
180 GLbitfield64 varying_inputs = 0x0;
181 bool swap_pos = false;
182
183 /* Install the default (ie Current) attributes first, then overlay
184 * all active ones.
185 */
186 switch (get_program_mode(exec->ctx)) {
187 case VP_NONE:
188 for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
189 exec->vtx.inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
190 }
191 for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
192 assert(VERT_ATTRIB_GENERIC(attr) < ARRAY_SIZE(exec->vtx.inputs));
193 exec->vtx.inputs[VERT_ATTRIB_GENERIC(attr)] =
194 &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT+attr];
195 }
196 map = vbo->map_vp_none;
197 break;
198 case VP_ARB:
199 for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
200 exec->vtx.inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr];
201 }
202 for (attr = 0; attr < VERT_ATTRIB_GENERIC_MAX; attr++) {
203 assert(VERT_ATTRIB_GENERIC(attr) < ARRAY_SIZE(exec->vtx.inputs));
204 exec->vtx.inputs[VERT_ATTRIB_GENERIC(attr)] =
205 &vbo->currval[VBO_ATTRIB_GENERIC0+attr];
206 }
207 map = vbo->map_vp_arb;
208
209 /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
210 * In that case we effectively need to route the data from
211 * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
212 * The original state gets essentially restored below.
213 */
214 if ((ctx->VertexProgram._Current->info.inputs_read &
215 VERT_BIT_POS) == 0 &&
216 (ctx->VertexProgram._Current->info.inputs_read &
217 VERT_BIT_GENERIC0)) {
218 swap_pos = true;
219 exec->vtx.inputs[VERT_ATTRIB_GENERIC0] = exec->vtx.inputs[0];
220 exec->vtx.attrsz[VERT_ATTRIB_GENERIC0] = exec->vtx.attrsz[0];
221 exec->vtx.attrtype[VERT_ATTRIB_GENERIC0] = exec->vtx.attrtype[0];
222 exec->vtx.attrptr[VERT_ATTRIB_GENERIC0] = exec->vtx.attrptr[0];
223 exec->vtx.attrsz[0] = 0;
224 }
225 break;
226 default:
227 assert(0);
228 }
229
230 for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
231 const GLuint src = map[attr];
232
233 if (exec->vtx.attrsz[src]) {
234 GLsizeiptr offset = (GLbyte *)exec->vtx.attrptr[src] -
235 (GLbyte *)exec->vtx.vertex;
236
237 /* override the default array set above */
238 assert(attr < ARRAY_SIZE(exec->vtx.inputs));
239 assert(attr < ARRAY_SIZE(exec->vtx.arrays)); /* arrays[] */
240 exec->vtx.inputs[attr] = &arrays[attr];
241
242 if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
243 /* a real buffer obj: Ptr is an offset, not a pointer */
244 assert(exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Pointer);
245 assert(offset >= 0);
246 arrays[attr].Ptr = (GLubyte *)
247 exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Offset + offset;
248 }
249 else {
250 /* Ptr into ordinary app memory */
251 arrays[attr].Ptr = (GLubyte *)exec->vtx.buffer_map + offset;
252 }
253 arrays[attr].Size = exec->vtx.attrsz[src];
254 arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
255 arrays[attr].Type = exec->vtx.attrtype[src];
256 arrays[attr].Integer =
257 vbo_attrtype_to_integer_flag(exec->vtx.attrtype[src]);
258 arrays[attr].Format = GL_RGBA;
259 arrays[attr]._ElementSize = arrays[attr].Size * sizeof(GLfloat);
260 _mesa_reference_buffer_object(ctx,
261 &arrays[attr].BufferObj,
262 exec->vtx.bufferobj);
263
264 varying_inputs |= VERT_BIT(attr);
265 }
266 }
267
268 /* In case we swapped the position and generic0 attribute.
269 * Restore the original setting of the vtx.* variables.
270 * They are still needed with the original order and settings in case
271 * of a split primitive.
272 */
273 if (swap_pos) {
274 exec->vtx.attrsz[0] = exec->vtx.attrsz[VERT_ATTRIB_GENERIC0];
275 exec->vtx.attrsz[VERT_ATTRIB_GENERIC0] = 0;
276 }
277
278 _mesa_set_varying_vp_inputs( ctx, varying_inputs );
279 ctx->NewDriverState |= ctx->DriverFlags.NewArray;
280 }
281
282
283 /**
284 * Unmap the VBO. This is called before drawing.
285 */
286 static void
vbo_exec_vtx_unmap(struct vbo_exec_context * exec)287 vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
288 {
289 if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
290 struct gl_context *ctx = exec->ctx;
291
292 if (ctx->Driver.FlushMappedBufferRange) {
293 GLintptr offset = exec->vtx.buffer_used -
294 exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Offset;
295 GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) *
296 sizeof(float);
297
298 if (length)
299 ctx->Driver.FlushMappedBufferRange(ctx, offset, length,
300 exec->vtx.bufferobj,
301 MAP_INTERNAL);
302 }
303
304 exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
305 exec->vtx.buffer_map) * sizeof(float);
306
307 assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE);
308 assert(exec->vtx.buffer_ptr != NULL);
309
310 ctx->Driver.UnmapBuffer(ctx, exec->vtx.bufferobj, MAP_INTERNAL);
311 exec->vtx.buffer_map = NULL;
312 exec->vtx.buffer_ptr = NULL;
313 exec->vtx.max_vert = 0;
314 }
315 }
316
317
318 /**
319 * Map the vertex buffer to begin storing glVertex, glColor, etc data.
320 */
321 void
vbo_exec_vtx_map(struct vbo_exec_context * exec)322 vbo_exec_vtx_map( struct vbo_exec_context *exec )
323 {
324 struct gl_context *ctx = exec->ctx;
325 const GLenum accessRange = GL_MAP_WRITE_BIT | /* for MapBufferRange */
326 GL_MAP_INVALIDATE_RANGE_BIT |
327 GL_MAP_UNSYNCHRONIZED_BIT |
328 GL_MAP_FLUSH_EXPLICIT_BIT |
329 MESA_MAP_NOWAIT_BIT;
330 const GLenum usage = GL_STREAM_DRAW_ARB;
331
332 if (!_mesa_is_bufferobj(exec->vtx.bufferobj))
333 return;
334
335 assert(!exec->vtx.buffer_map);
336 assert(!exec->vtx.buffer_ptr);
337
338 if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024) {
339 /* The VBO exists and there's room for more */
340 if (exec->vtx.bufferobj->Size > 0) {
341 exec->vtx.buffer_map =
342 (fi_type *)ctx->Driver.MapBufferRange(ctx,
343 exec->vtx.buffer_used,
344 (VBO_VERT_BUFFER_SIZE -
345 exec->vtx.buffer_used),
346 accessRange,
347 exec->vtx.bufferobj,
348 MAP_INTERNAL);
349 exec->vtx.buffer_ptr = exec->vtx.buffer_map;
350 }
351 else {
352 exec->vtx.buffer_ptr = exec->vtx.buffer_map = NULL;
353 }
354 }
355
356 if (!exec->vtx.buffer_map) {
357 /* Need to allocate a new VBO */
358 exec->vtx.buffer_used = 0;
359
360 if (ctx->Driver.BufferData(ctx, GL_ARRAY_BUFFER_ARB,
361 VBO_VERT_BUFFER_SIZE,
362 NULL, usage,
363 GL_MAP_WRITE_BIT |
364 GL_DYNAMIC_STORAGE_BIT |
365 GL_CLIENT_STORAGE_BIT,
366 exec->vtx.bufferobj)) {
367 /* buffer allocation worked, now map the buffer */
368 exec->vtx.buffer_map =
369 (fi_type *)ctx->Driver.MapBufferRange(ctx,
370 0, VBO_VERT_BUFFER_SIZE,
371 accessRange,
372 exec->vtx.bufferobj,
373 MAP_INTERNAL);
374 }
375 else {
376 _mesa_error(ctx, GL_OUT_OF_MEMORY, "VBO allocation");
377 exec->vtx.buffer_map = NULL;
378 }
379 }
380
381 exec->vtx.buffer_ptr = exec->vtx.buffer_map;
382
383 if (!exec->vtx.buffer_map) {
384 /* out of memory */
385 _mesa_install_exec_vtxfmt( ctx, &exec->vtxfmt_noop );
386 }
387 else {
388 if (_mesa_using_noop_vtxfmt(ctx->Exec)) {
389 /* The no-op functions are installed so switch back to regular
390 * functions. We do this test just to avoid frequent and needless
391 * calls to _mesa_install_exec_vtxfmt().
392 */
393 _mesa_install_exec_vtxfmt(ctx, &exec->vtxfmt);
394 }
395 }
396
397 if (0)
398 printf("map %d..\n", exec->vtx.buffer_used);
399 }
400
401
402
403 /**
404 * Execute the buffer and save copied verts.
405 * \param keep_unmapped if true, leave the VBO unmapped when we're done.
406 */
407 void
vbo_exec_vtx_flush(struct vbo_exec_context * exec,GLboolean keepUnmapped)408 vbo_exec_vtx_flush(struct vbo_exec_context *exec, GLboolean keepUnmapped)
409 {
410 if (0)
411 vbo_exec_debug_verts( exec );
412
413 if (exec->vtx.prim_count &&
414 exec->vtx.vert_count) {
415
416 exec->vtx.copied.nr = vbo_copy_vertices( exec );
417
418 if (exec->vtx.copied.nr != exec->vtx.vert_count) {
419 struct gl_context *ctx = exec->ctx;
420
421 /* Before the update_state() as this may raise _NEW_VARYING_VP_INPUTS
422 * from _mesa_set_varying_vp_inputs().
423 */
424 vbo_exec_bind_arrays( ctx );
425
426 if (ctx->NewState)
427 _mesa_update_state( ctx );
428
429 if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
430 vbo_exec_vtx_unmap( exec );
431 }
432
433 if (0)
434 printf("%s %d %d\n", __func__, exec->vtx.prim_count,
435 exec->vtx.vert_count);
436
437 vbo_context(ctx)->draw_prims( ctx,
438 exec->vtx.prim,
439 exec->vtx.prim_count,
440 NULL,
441 GL_TRUE,
442 0,
443 exec->vtx.vert_count - 1,
444 NULL, 0, NULL);
445
446 /* If using a real VBO, get new storage -- unless asked not to.
447 */
448 if (_mesa_is_bufferobj(exec->vtx.bufferobj) && !keepUnmapped) {
449 vbo_exec_vtx_map( exec );
450 }
451 }
452 }
453
454 /* May have to unmap explicitly if we didn't draw:
455 */
456 if (keepUnmapped &&
457 _mesa_is_bufferobj(exec->vtx.bufferobj) &&
458 exec->vtx.buffer_map) {
459 vbo_exec_vtx_unmap( exec );
460 }
461
462 if (keepUnmapped || exec->vtx.vertex_size == 0)
463 exec->vtx.max_vert = 0;
464 else
465 exec->vtx.max_vert = vbo_compute_max_verts(exec);
466
467 exec->vtx.buffer_ptr = exec->vtx.buffer_map;
468 exec->vtx.prim_count = 0;
469 exec->vtx.vert_count = 0;
470 }
471