lxdream 0.9.1| filename | src/pvr2/scene.c |
| changeset | 677:3ee62740ff8f |
| prev | 669:ab344e42bca9 |
| next | 687:6bdc2b7032ea |
| author | nkeynes |
| date | Thu May 29 10:50:25 2008 +0000 (14 years ago) |
| permissions | -rw-r--r-- |
| last change | Remove pvr2mmio.h include from pvr2.h (it's supposed to be moore or less private) Move redraw function from driver into pvr2_redraw_display() |
| view | annotate | diff | log | raw |
1 /**
2 * $Id$
3 *
4 * Manage the internal vertex/polygon buffers and scene data structure.
5 * Where possible this uses VBOs for the vertex + index data.
6 *
7 * Copyright (c) 2005 Nathan Keynes.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
20 #include <assert.h>
21 #include <string.h>
22 #include <math.h>
23 #include "lxdream.h"
24 #include "display.h"
25 #include "pvr2/pvr2.h"
26 #include "pvr2/pvr2mmio.h"
27 #include "pvr2/glutil.h"
28 #include "pvr2/scene.h"
31 static inline uint32_t bgra_to_rgba(uint32_t bgra)
32 {
33 return (bgra&0xFF00FF00) | ((bgra&0x00FF0000)>>16) | ((bgra&0x000000FF)<<16);
34 }
36 /**
37 * Convert a half-float (16-bit) FP number to a regular 32-bit float.
38 * Source is 1-bit sign, 5-bit exponent, 10-bit mantissa.
39 * TODO: Check the correctness of this.
40 */
41 static float halftofloat( uint16_t half )
42 {
43 union {
44 float f;
45 uint32_t i;
46 } temp;
47 temp.i = ((uint32_t)half)<<16;
48 return temp.f;
49 }
55 struct pvr2_scene_struct pvr2_scene;
57 static gboolean vbo_init = FALSE;
59 #ifdef ENABLE_VERTEX_BUFFER
60 static gboolean vbo_supported = FALSE;
61 #endif
63 /**
64 * Test for VBO support, and allocate all the system memory needed for the
65 * temporary structures. GL context must have been initialized before this
66 * point.
67 */
68 void pvr2_scene_init()
69 {
70 if( !vbo_init ) {
71 #ifdef ENABLE_VERTEX_BUFFER
72 if( isGLVertexBufferSupported() ) {
73 vbo_supported = TRUE;
74 pvr2_scene.vbo_id = 1;
75 }
76 #endif
77 pvr2_scene.vertex_array = NULL;
78 pvr2_scene.vertex_array_size = 0;
79 pvr2_scene.poly_array = g_malloc( MAX_POLY_BUFFER_SIZE );
80 pvr2_scene.buf_to_poly_map = g_malloc0( BUF_POLY_MAP_SIZE );
81 vbo_init = TRUE;
82 }
83 }
85 /**
86 * Clear the scene data structures in preparation for fresh data
87 */
88 void pvr2_scene_reset()
89 {
90 pvr2_scene.poly_count = 0;
91 pvr2_scene.vertex_count = 0;
92 memset( pvr2_scene.buf_to_poly_map, 0, BUF_POLY_MAP_SIZE );
93 }
95 void pvr2_scene_shutdown()
96 {
97 #ifdef ENABLE_VERTEX_BUFFER
98 if( vbo_supported ) {
99 glBindBufferARB( GL_ARRAY_BUFFER_ARB, 0 );
100 glDeleteBuffersARB( 1, &pvr2_scene.vbo_id );
101 pvr2_scene.vbo_id = 0;
102 } else {
103 #endif
104 g_free( pvr2_scene.vertex_array );
105 pvr2_scene.vertex_array = NULL;
106 #ifdef ENABLE_VERTEX_BUFFER
107 }
108 #endif
110 g_free( pvr2_scene.poly_array );
111 pvr2_scene.poly_array = NULL;
112 g_free( pvr2_scene.buf_to_poly_map );
113 pvr2_scene.buf_to_poly_map = NULL;
114 vbo_init = FALSE;
115 }
117 void *vertex_buffer_map()
118 {
119 glGetError();
120 uint32_t size = pvr2_scene.vertex_count * sizeof(struct vertex_struct);
121 #ifdef ENABLE_VERTEX_BUFFER
122 if( vbo_supported ) {
123 glBindBufferARB( GL_ARRAY_BUFFER_ARB, pvr2_scene.vbo_id );
124 if( size > pvr2_scene.vertex_array_size ) {
125 glBufferDataARB( GL_ARRAY_BUFFER_ARB, size, NULL, GL_DYNAMIC_DRAW_ARB );
126 int status = glGetError();
127 if( status != 0 ) {
128 fprintf( stderr, "Error %08X allocating vertex buffer\n", status );
129 abort();
130 }
131 pvr2_scene.vertex_array_size = size;
132 }
133 pvr2_scene.vertex_array = glMapBufferARB( GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB );
134 assert(pvr2_scene.vertex_array != NULL );
135 } else {
136 #endif
137 if( size > pvr2_scene.vertex_array_size ) {
138 pvr2_scene.vertex_array = g_realloc( pvr2_scene.vertex_array, size );
139 }
140 #ifdef ENABLE_VERTEX_BUFFER
141 }
142 #endif
143 return pvr2_scene.vertex_array;
144 }
146 gboolean vertex_buffer_unmap()
147 {
148 #ifdef ENABLE_VERTEX_BUFFER
149 if( vbo_supported ) {
150 pvr2_scene.vertex_array = NULL;
151 return glUnmapBufferARB( GL_ARRAY_BUFFER_ARB );
152 } else {
153 return TRUE;
154 }
155 #else
156 return TRUE;
157 #endif
158 }
160 static struct polygon_struct *scene_add_polygon( pvraddr_t poly_idx, int vertex_count,
161 gboolean is_modified )
162 {
163 int vert_mul = is_modified ? 2 : 1;
165 if( pvr2_scene.buf_to_poly_map[poly_idx] != NULL ) {
166 if( vertex_count > pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count ) {
167 pvr2_scene.vertex_count += (vertex_count - pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count) * vert_mul;
168 pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count = vertex_count;
169 }
170 return pvr2_scene.buf_to_poly_map[poly_idx];
171 } else {
172 struct polygon_struct *poly = &pvr2_scene.poly_array[pvr2_scene.poly_count++];
173 poly->context = (uint32_t *)(video_base + MMIO_READ(PVR2,RENDER_POLYBASE) + (poly_idx<<2));
174 poly->vertex_count = vertex_count;
175 poly->vertex_index = -1;
176 poly->mod_vertex_index = -1;
177 poly->next = NULL;
178 pvr2_scene.buf_to_poly_map[poly_idx] = poly;
179 pvr2_scene.vertex_count += (vertex_count * vert_mul);
180 return poly;
181 }
182 }
184 /**
185 * Decode a single PVR2 renderable vertex (opaque/trans/punch-out, but not shadow
186 * volume)
187 * @param vert Pointer to output vertex structure
188 * @param poly1 First word of polygon context (needed to understand vertex)
189 * @param poly2 Second word of polygon context
190 * @param pvr2_data Pointer to raw pvr2 vertex data (in VRAM)
191 * @param modify_offset Offset in 32-bit words to the tex/color data. 0 for
192 * the normal vertex, half the vertex length for the modified vertex.
193 */
194 static void pvr2_decode_render_vertex( struct vertex_struct *vert, uint32_t poly1,
195 uint32_t poly2, uint32_t *pvr2_data,
196 int modify_offset )
197 {
198 gboolean force_alpha = !POLY2_ALPHA_ENABLE(poly2);
199 union pvr2_data_type {
200 uint32_t *ival;
201 float *fval;
202 } data;
204 data.ival = pvr2_data;
206 vert->x = *data.fval++;
207 vert->y = *data.fval++;
209 float z = *data.fval++;
210 if( !isfinite(z) ) {
211 z = 0;
212 } else if( z != 0 ) {
213 z = 1/z;
214 }
215 if( z > pvr2_scene.bounds[5] ) {
216 pvr2_scene.bounds[5] = z;
217 } else if( z < pvr2_scene.bounds[4] && z != 0 ) {
218 pvr2_scene.bounds[4] = z;
219 }
220 vert->z = z;
221 data.ival += modify_offset;
224 if( POLY1_TEXTURED(poly1) ) {
225 if( POLY1_UV16(poly1) ) {
226 vert->u = halftofloat( *data.ival>>16 );
227 vert->v = halftofloat( *data.ival );
228 data.ival++;
229 } else {
230 vert->u = *data.fval++;
231 vert->v = *data.fval++;
232 }
233 if( POLY2_TEX_BLEND(poly2) == 1 ) {
234 force_alpha = TRUE;
235 }
236 }
237 if( force_alpha ) {
238 vert->rgba = bgra_to_rgba((*data.ival++) | 0xFF000000);
239 if( POLY1_SPECULAR(poly1) ) {
240 vert->offset_rgba = bgra_to_rgba((*data.ival++) | 0xFF000000);
241 } else {
242 vert->offset_rgba = 0;
243 }
244 } else {
245 vert->rgba = bgra_to_rgba(*data.ival++);
246 if( POLY1_SPECULAR(poly1) ) {
247 vert->offset_rgba = bgra_to_rgba(*data.ival++);
248 } else {
249 vert->offset_rgba = 0;
250 }
251 }
252 }
254 /**
255 * Compute texture, colour, and z values for a result point by interpolating from
256 * a set of 3 input points. The result point must define its x,y.
257 */
258 static void scene_compute_vertex( struct vertex_struct *result,
259 struct vertex_struct *input,
260 gboolean is_solid_shaded )
261 {
262 int i;
263 float sx = input[2].x - input[1].x;
264 float sy = input[2].y - input[1].y;
265 float tx = input[0].x - input[1].x;
266 float ty = input[0].y - input[1].y;
268 float detxy = ((sy) * (tx)) - ((ty) * (sx));
269 if( detxy == 0 ) {
270 result->z = input[2].z;
271 result->u = input[2].u;
272 result->v = input[2].v;
273 result->rgba = input[2].rgba;
274 result->offset_rgba = input[2].offset_rgba;
275 return;
276 }
277 float t = ((result->x - input[1].x) * sy -
278 (result->y - input[1].y) * sx) / detxy;
279 float s = ((result->y - input[1].y) * tx -
280 (result->x - input[1].x) * ty) / detxy;
282 float sz = input[2].z - input[1].z;
283 float tz = input[0].z - input[1].z;
284 float su = input[2].u - input[1].u;
285 float tu = input[0].u - input[1].u;
286 float sv = input[2].v - input[1].v;
287 float tv = input[0].v - input[1].v;
289 float rz = input[1].z + (t*tz) + (s*sz);
290 if( rz > pvr2_scene.bounds[5] ) {
291 pvr2_scene.bounds[5] = rz;
292 } else if( rz < pvr2_scene.bounds[4] ) {
293 pvr2_scene.bounds[4] = rz;
294 }
295 result->z = rz;
296 result->u = input[1].u + (t*tu) + (s*su);
297 result->v = input[1].v + (t*tv) + (s*sv);
299 if( is_solid_shaded ) {
300 result->rgba = input[2].rgba;
301 result->offset_rgba = input[2].offset_rgba;
302 } else {
303 uint8_t *rgba0 = (uint8_t *)&input[0].rgba;
304 uint8_t *rgba1 = (uint8_t *)&input[1].rgba;
305 uint8_t *rgba2 = (uint8_t *)&input[2].rgba;
306 uint8_t *rgba3 = (uint8_t *)&result->rgba;
307 for( i=0; i<8; i++ ) { // note: depends on rgba & offset_rgba being adjacent
308 float tc = *rgba0++ - *rgba1;
309 float sc = *rgba2++ - *rgba1;
310 float rc = *rgba1++ + (t*tc) + (s*sc);
311 if( rc < 0 ) {
312 rc = 0;
313 } else if( rc > 255 ) {
314 rc = 255;
315 }
316 *rgba3++ = rc;
317 }
318 }
320 }
322 static void scene_add_vertexes( pvraddr_t poly_idx, int vertex_length,
323 gboolean is_modified )
324 {
325 struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[poly_idx];
326 uint32_t *ptr = &pvr2_scene.pvr2_pbuf[poly_idx];
327 uint32_t *context = ptr;
328 unsigned int i;
330 if( poly->vertex_index == -1 ) {
331 ptr += (is_modified ? 5 : 3 );
332 poly->vertex_index = pvr2_scene.vertex_index;
334 assert( poly != NULL );
335 assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
336 for( i=0; i<poly->vertex_count; i++ ) {
337 pvr2_decode_render_vertex( &pvr2_scene.vertex_array[pvr2_scene.vertex_index++], context[0], context[1], ptr, 0 );
338 ptr += vertex_length;
339 }
340 if( is_modified ) {
341 int mod_offset = (vertex_length - 3)>>1;
342 assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
343 ptr = &pvr2_scene.pvr2_pbuf[poly_idx] + 5;
344 poly->mod_vertex_index = pvr2_scene.vertex_index;
345 for( i=0; i<poly->vertex_count; i++ ) {
346 pvr2_decode_render_vertex( &pvr2_scene.vertex_array[pvr2_scene.vertex_index++], context[0], context[3], ptr, mod_offset );
347 ptr += vertex_length;
348 }
349 }
350 }
351 }
353 static void scene_add_quad_vertexes( pvraddr_t poly_idx, int vertex_length,
354 gboolean is_modified )
355 {
356 struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[poly_idx];
357 uint32_t *ptr = &pvr2_scene.pvr2_pbuf[poly_idx];
358 uint32_t *context = ptr;
359 unsigned int i;
361 if( poly->vertex_index == -1 ) {
362 // Construct it locally and copy to the vertex buffer, as the VBO is
363 // allowed to be horribly slow for reads (ie it could be direct-mapped
364 // vram).
365 struct vertex_struct quad[4];
367 assert( poly != NULL );
368 assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
369 ptr += (is_modified ? 5 : 3 );
370 poly->vertex_index = pvr2_scene.vertex_index;
371 for( i=0; i<4; i++ ) {
372 pvr2_decode_render_vertex( &quad[i], context[0], context[1], ptr, 0 );
373 ptr += vertex_length;
374 }
375 scene_compute_vertex( &quad[3], &quad[0], !POLY1_GOURAUD_SHADED(context[0]) );
376 // Swap last two vertexes (quad arrangement => tri strip arrangement)
377 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index], quad, sizeof(struct vertex_struct)*2 );
378 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+2], &quad[3], sizeof(struct vertex_struct) );
379 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3], &quad[2], sizeof(struct vertex_struct) );
380 pvr2_scene.vertex_index += 4;
382 if( is_modified ) {
383 int mod_offset = (vertex_length - 3)>>1;
384 assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
385 ptr = &pvr2_scene.pvr2_pbuf[poly_idx] + 5;
386 poly->mod_vertex_index = pvr2_scene.vertex_index;
387 for( i=0; i<4; i++ ) {
388 pvr2_decode_render_vertex( &quad[4], context[0], context[3], ptr, mod_offset );
389 ptr += vertex_length;
390 }
391 scene_compute_vertex( &quad[3], &quad[0], !POLY1_GOURAUD_SHADED(context[0]) );
392 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index], quad, sizeof(struct vertex_struct)*2 );
393 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+2], &quad[3], sizeof(struct vertex_struct) );
394 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3], &quad[2], sizeof(struct vertex_struct) );
395 pvr2_scene.vertex_index += 4;
396 }
397 }
398 }
400 static void scene_extract_polygons( pvraddr_t tile_entry )
401 {
402 uint32_t *tile_list = (uint32_t *)(video_base+tile_entry);
403 do {
404 uint32_t entry = *tile_list++;
405 if( entry >> 28 == 0x0F ) {
406 break;
407 } else if( entry >> 28 == 0x0E ) {
408 tile_list = (uint32_t *)(video_base + (entry&0x007FFFFF));
409 } else {
410 pvraddr_t polyaddr = entry&0x000FFFFF;
411 int is_modified = (entry & 0x01000000) && pvr2_scene.full_shadow;
412 int vertex_length = (entry >> 21) & 0x07;
413 int context_length = 3;
414 if( is_modified ) {
415 context_length = 5;
416 vertex_length <<= 1 ;
417 }
418 vertex_length += 3;
420 if( (entry & 0xE0000000) == 0x80000000 ) {
421 /* Triangle(s) */
422 int strip_count = ((entry >> 25) & 0x0F)+1;
423 int polygon_length = 3 * vertex_length + context_length;
424 int i;
425 struct polygon_struct *last_poly = NULL;
426 for( i=0; i<strip_count; i++ ) {
427 struct polygon_struct *poly = scene_add_polygon( polyaddr, 3, is_modified );
428 polyaddr += polygon_length;
429 if( last_poly != NULL && last_poly->next == NULL ) {
430 last_poly->next = poly;
431 }
432 last_poly = poly;
433 }
434 } else if( (entry & 0xE0000000) == 0xA0000000 ) {
435 /* Sprite(s) */
436 int strip_count = ((entry >> 25) & 0x0F)+1;
437 int polygon_length = 4 * vertex_length + context_length;
438 int i;
439 struct polygon_struct *last_poly = NULL;
440 for( i=0; i<strip_count; i++ ) {
441 struct polygon_struct *poly = scene_add_polygon( polyaddr, 4, is_modified );
442 polyaddr += polygon_length;
443 if( last_poly != NULL && last_poly->next == NULL ) {
444 last_poly->next = poly;
445 }
446 last_poly = poly;
447 }
448 } else {
449 /* Polygon */
450 int i, last = -1;
451 for( i=5; i>=0; i-- ) {
452 if( entry & (0x40000000>>i) ) {
453 last = i;
454 break;
455 }
456 }
457 if( last != -1 ) {
458 scene_add_polygon( polyaddr, last+3, is_modified );
459 }
460 }
461 }
462 } while( 1 );
463 }
465 static void scene_extract_vertexes( pvraddr_t tile_entry )
466 {
467 uint32_t *tile_list = (uint32_t *)(video_base+tile_entry);
468 do {
469 uint32_t entry = *tile_list++;
470 if( entry >> 28 == 0x0F ) {
471 break;
472 } else if( entry >> 28 == 0x0E ) {
473 tile_list = (uint32_t *)(video_base + (entry&0x007FFFFF));
474 } else {
475 pvraddr_t polyaddr = entry&0x000FFFFF;
476 int is_modified = (entry & 0x01000000) && pvr2_scene.full_shadow;
477 int vertex_length = (entry >> 21) & 0x07;
478 int context_length = 3;
479 if( is_modified ) {
480 context_length = 5;
481 vertex_length <<=1 ;
482 }
483 vertex_length += 3;
485 if( (entry & 0xE0000000) == 0x80000000 ) {
486 /* Triangle(s) */
487 int strip_count = ((entry >> 25) & 0x0F)+1;
488 int polygon_length = 3 * vertex_length + context_length;
489 int i;
490 for( i=0; i<strip_count; i++ ) {
491 scene_add_vertexes( polyaddr, vertex_length, is_modified );
492 polyaddr += polygon_length;
493 }
494 } else if( (entry & 0xE0000000) == 0xA0000000 ) {
495 /* Sprite(s) */
496 int strip_count = ((entry >> 25) & 0x0F)+1;
497 int polygon_length = 4 * vertex_length + context_length;
498 int i;
499 for( i=0; i<strip_count; i++ ) {
500 scene_add_quad_vertexes( polyaddr, vertex_length, is_modified );
501 polyaddr += polygon_length;
502 }
503 } else {
504 /* Polygon */
505 int i, last = -1;
506 for( i=5; i>=0; i-- ) {
507 if( entry & (0x40000000>>i) ) {
508 last = i;
509 break;
510 }
511 }
512 if( last != -1 ) {
513 scene_add_vertexes( polyaddr, vertex_length, is_modified );
514 }
515 }
516 }
517 } while( 1 );
518 }
520 uint32_t pvr2_scene_buffer_width()
521 {
522 return pvr2_scene.buffer_width;
523 }
525 uint32_t pvr2_scene_buffer_height()
526 {
527 return pvr2_scene.buffer_height;
528 }
530 /**
531 * Extract the current scene into the rendering structures. We run two passes
532 * - first pass extracts the polygons into pvr2_scene.poly_array (finding vertex counts),
533 * second pass extracts the vertex data into the VBO/vertex array.
534 *
535 * Difficult to do in single pass as we don't generally know the size of a
536 * polygon for certain until we've seen all tiles containing it. It also means we
537 * can count the vertexes and allocate the appropriate size VBO.
538 *
539 * FIXME: accesses into VRAM need to be bounds-checked properly
540 */
541 void pvr2_scene_read( void )
542 {
543 pvr2_scene_init();
544 pvr2_scene_reset();
546 pvr2_scene.bounds[0] = MMIO_READ( PVR2, RENDER_HCLIP ) & 0x03FF;
547 pvr2_scene.bounds[1] = ((MMIO_READ( PVR2, RENDER_HCLIP ) >> 16) & 0x03FF) + 1;
548 pvr2_scene.bounds[2] = MMIO_READ( PVR2, RENDER_VCLIP ) & 0x03FF;
549 pvr2_scene.bounds[3] = ((MMIO_READ( PVR2, RENDER_VCLIP ) >> 16) & 0x03FF) + 1;
550 pvr2_scene.bounds[4] = pvr2_scene.bounds[5] = MMIO_READF( PVR2, RENDER_FARCLIP );
552 uint32_t *tilebuffer = (uint32_t *)(video_base + MMIO_READ( PVR2, RENDER_TILEBASE ));
553 uint32_t *segment = tilebuffer;
554 pvr2_scene.segment_list = (struct tile_segment *)tilebuffer;
555 pvr2_scene.pvr2_pbuf = (uint32_t *)(video_base + MMIO_READ(PVR2,RENDER_POLYBASE));
556 pvr2_scene.full_shadow = MMIO_READ( PVR2, RENDER_SHADOW ) & 0x100 ? FALSE : TRUE;
558 int max_tile_x = 0;
559 int max_tile_y = 0;
560 int obj_config = MMIO_READ( PVR2, RENDER_OBJCFG );
561 int isp_config = MMIO_READ( PVR2, RENDER_ISPCFG );
563 if( (obj_config & 0x00200000) == 0 ) {
564 if( isp_config & 1 ) {
565 pvr2_scene.sort_mode = SORT_NEVER;
566 } else {
567 pvr2_scene.sort_mode = SORT_ALWAYS;
568 }
569 } else {
570 pvr2_scene.sort_mode = SORT_TILEFLAG;
571 }
573 // Pass 1: Extract polygon list
574 uint32_t control;
575 int i;
576 do {
577 control = *segment++;
578 int tile_x = SEGMENT_X(control);
579 int tile_y = SEGMENT_Y(control);
580 if( tile_x > max_tile_x ) {
581 max_tile_x = tile_x;
582 }
583 if( tile_y > max_tile_y ) {
584 max_tile_y = tile_y;
585 }
586 for( i=0; i<5; i++ ) {
587 if( (*segment & NO_POINTER) == 0 ) {
588 scene_extract_polygons( *segment );
589 }
590 segment++;
591 }
592 } while( (control & SEGMENT_END) == 0 );
594 pvr2_scene.buffer_width = (max_tile_x+1)<<5;
595 pvr2_scene.buffer_height = (max_tile_y+1)<<5;
597 if( pvr2_scene.vertex_count > 0 ) {
598 // Pass 2: Extract vertex data
599 vertex_buffer_map();
600 pvr2_scene.vertex_index = 0;
601 segment = tilebuffer;
602 do {
603 control = *segment++;
604 for( i=0; i<5; i++ ) {
605 if( (*segment & NO_POINTER) == 0 ) {
606 scene_extract_vertexes( *segment );
607 }
608 segment++;
609 }
610 } while( (control & SEGMENT_END) == 0 );
611 vertex_buffer_unmap();
612 }
613 }
615 /**
616 * Dump the current scene to file in a (mostly) human readable form
617 */
618 void pvr2_scene_dump( FILE *f )
619 {
620 int i,j;
622 fprintf( f, "Polygons: %d\n", pvr2_scene.poly_count );
623 for( i=0; i<pvr2_scene.poly_count; i++ ) {
624 struct polygon_struct *poly = &pvr2_scene.poly_array[i];
625 fprintf( f, " %08X ", ((unsigned char *)poly->context) - video_base );
626 switch( poly->vertex_count ) {
627 case 3: fprintf( f, "Tri " ); break;
628 case 4: fprintf( f, "Quad " ); break;
629 default: fprintf( f,"%d-Strip ", poly->vertex_count-2 ); break;
630 }
631 fprintf( f, "%08X %08X %08X ", poly->context[0], poly->context[1], poly->context[2] );
632 if( poly->mod_vertex_index != -1 ) {
633 fprintf( f, "%08X %08X\n", poly->context[3], poly->context[5] );
634 } else {
635 fprintf( f, "\n" );
636 }
638 for( j=0; j<poly->vertex_count; j++ ) {
639 struct vertex_struct *v = &pvr2_scene.vertex_array[poly->vertex_index+j];
640 fprintf( f, " %.5f %.5f %.5f, (%.5f,%.5f) %08X %08X\n", v->x, v->y, v->z, v->u, v->v,
641 v->rgba, v->offset_rgba );
642 }
643 if( poly->mod_vertex_index != -1 ) {
644 fprintf( f, " ---\n" );
645 for( j=0; j<poly->vertex_count; j++ ) {
646 struct vertex_struct *v = &pvr2_scene.vertex_array[poly->mod_vertex_index+j];
647 fprintf( f, " %.5f %.5f %.5f, (%.5f,%.5f) %08X %08X\n", v->x, v->y, v->z, v->u, v->v,
648 v->rgba, v->offset_rgba );
649 }
650 }
651 }
653 }
.