lxdream 0.9.1| filename | src/pvr2/scene.c |
| changeset | 784:0417e1c488b3 |
| prev | 736:a02d1475ccfd |
| next | 827:d333f4248727 |
| author | nkeynes |
| date | Thu Aug 07 23:53:17 2008 +0000 (15 years ago) |
| permissions | -rw-r--r-- |
| last change | Add ability to bind a render buffer to a texture, with output going to the texture. (RTT work in progress) |
| 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"
30 static void unpack_bgra(uint32_t bgra, float *rgba)
31 {
32 rgba[0] = ((float)(((bgra&0x00FF0000)>>16) + 1)) / 256.0;
33 rgba[1] = ((float)(((bgra&0x0000FF00)>>8) + 1)) / 256.0;
34 rgba[2] = ((float)((bgra&0x000000FF) + 1)) / 256.0;
35 rgba[3] = ((float)(((bgra&0xFF000000)>>24) + 1)) / 256.0;
36 }
38 static inline uint32_t bgra_to_rgba(uint32_t bgra)
39 {
40 return (bgra&0xFF00FF00) | ((bgra&0x00FF0000)>>16) | ((bgra&0x000000FF)<<16);
41 }
43 /**
44 * Convert a half-float (16-bit) FP number to a regular 32-bit float.
45 * Source is 1-bit sign, 5-bit exponent, 10-bit mantissa.
46 * TODO: Check the correctness of this.
47 */
48 static float halftofloat( uint16_t half )
49 {
50 union {
51 float f;
52 uint32_t i;
53 } temp;
54 temp.i = ((uint32_t)half)<<16;
55 return temp.f;
56 }
62 struct pvr2_scene_struct pvr2_scene;
64 static gboolean vbo_init = FALSE;
66 #ifdef ENABLE_VERTEX_BUFFER
67 static gboolean vbo_supported = FALSE;
68 #endif
70 /**
71 * Test for VBO support, and allocate all the system memory needed for the
72 * temporary structures. GL context must have been initialized before this
73 * point.
74 */
75 void pvr2_scene_init()
76 {
77 if( !vbo_init ) {
78 #ifdef ENABLE_VERTEX_BUFFER
79 if( isGLVertexBufferSupported() ) {
80 vbo_supported = TRUE;
81 pvr2_scene.vbo_id = 1;
82 }
83 #endif
84 pvr2_scene.vertex_array = NULL;
85 pvr2_scene.vertex_array_size = 0;
86 pvr2_scene.poly_array = g_malloc( MAX_POLY_BUFFER_SIZE );
87 pvr2_scene.buf_to_poly_map = g_malloc0( BUF_POLY_MAP_SIZE );
88 vbo_init = TRUE;
89 }
90 }
92 /**
93 * Clear the scene data structures in preparation for fresh data
94 */
95 void pvr2_scene_reset()
96 {
97 pvr2_scene.poly_count = 0;
98 pvr2_scene.vertex_count = 0;
99 memset( pvr2_scene.buf_to_poly_map, 0, BUF_POLY_MAP_SIZE );
100 }
102 void pvr2_scene_shutdown()
103 {
104 #ifdef ENABLE_VERTEX_BUFFER
105 if( vbo_supported ) {
106 glBindBufferARB( GL_ARRAY_BUFFER_ARB, 0 );
107 glDeleteBuffersARB( 1, &pvr2_scene.vbo_id );
108 pvr2_scene.vbo_id = 0;
109 } else {
110 #endif
111 g_free( pvr2_scene.vertex_array );
112 pvr2_scene.vertex_array = NULL;
113 #ifdef ENABLE_VERTEX_BUFFER
114 }
115 #endif
117 g_free( pvr2_scene.poly_array );
118 pvr2_scene.poly_array = NULL;
119 g_free( pvr2_scene.buf_to_poly_map );
120 pvr2_scene.buf_to_poly_map = NULL;
121 vbo_init = FALSE;
122 }
124 void *vertex_buffer_map()
125 {
126 // Allow 8 vertexes for the background (4+4)
127 uint32_t size = (pvr2_scene.vertex_count + 8) * sizeof(struct vertex_struct);
128 #ifdef ENABLE_VERTEX_BUFFER
129 if( vbo_supported ) {
130 glGetError();
131 glBindBufferARB( GL_ARRAY_BUFFER_ARB, pvr2_scene.vbo_id );
132 if( size > pvr2_scene.vertex_array_size ) {
133 glBufferDataARB( GL_ARRAY_BUFFER_ARB, size, NULL, GL_DYNAMIC_DRAW_ARB );
134 int status = glGetError();
135 if( status != 0 ) {
136 fprintf( stderr, "Error %08X allocating vertex buffer\n", status );
137 abort();
138 }
139 pvr2_scene.vertex_array_size = size;
140 }
141 pvr2_scene.vertex_array = glMapBufferARB( GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB );
142 assert(pvr2_scene.vertex_array != NULL );
143 } else {
144 #endif
145 if( size > pvr2_scene.vertex_array_size ) {
146 pvr2_scene.vertex_array = g_realloc( pvr2_scene.vertex_array, size );
147 }
148 #ifdef ENABLE_VERTEX_BUFFER
149 }
150 #endif
151 return pvr2_scene.vertex_array;
152 }
154 gboolean vertex_buffer_unmap()
155 {
156 #ifdef ENABLE_VERTEX_BUFFER
157 if( vbo_supported ) {
158 pvr2_scene.vertex_array = NULL;
159 return glUnmapBufferARB( GL_ARRAY_BUFFER_ARB );
160 } else {
161 return TRUE;
162 }
163 #else
164 return TRUE;
165 #endif
166 }
168 static struct polygon_struct *scene_add_polygon( pvraddr_t poly_idx, int vertex_count,
169 gboolean is_modified )
170 {
171 int vert_mul = is_modified ? 2 : 1;
173 if( pvr2_scene.buf_to_poly_map[poly_idx] != NULL ) {
174 if( vertex_count > pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count ) {
175 pvr2_scene.vertex_count += (vertex_count - pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count) * vert_mul;
176 pvr2_scene.buf_to_poly_map[poly_idx]->vertex_count = vertex_count;
177 }
178 return pvr2_scene.buf_to_poly_map[poly_idx];
179 } else {
180 struct polygon_struct *poly = &pvr2_scene.poly_array[pvr2_scene.poly_count++];
181 poly->context = &pvr2_scene.pvr2_pbuf[poly_idx];
182 poly->vertex_count = vertex_count;
183 poly->vertex_index = -1;
184 poly->mod_vertex_index = -1;
185 poly->next = NULL;
186 pvr2_scene.buf_to_poly_map[poly_idx] = poly;
187 pvr2_scene.vertex_count += (vertex_count * vert_mul);
188 return poly;
189 }
190 }
192 /**
193 * Decode a single PVR2 renderable vertex (opaque/trans/punch-out, but not shadow
194 * volume)
195 * @param vert Pointer to output vertex structure
196 * @param poly1 First word of polygon context (needed to understand vertex)
197 * @param poly2 Second word of polygon context
198 * @param pvr2_data Pointer to raw pvr2 vertex data (in VRAM)
199 * @param modify_offset Offset in 32-bit words to the tex/color data. 0 for
200 * the normal vertex, half the vertex length for the modified vertex.
201 */
202 static void pvr2_decode_render_vertex( struct vertex_struct *vert, uint32_t poly1,
203 uint32_t poly2, uint32_t *pvr2_data,
204 int modify_offset )
205 {
206 gboolean force_alpha = !POLY2_ALPHA_ENABLE(poly2);
207 union pvr2_data_type {
208 uint32_t *ival;
209 float *fval;
210 } data;
212 data.ival = pvr2_data;
214 vert->x = *data.fval++;
215 vert->y = *data.fval++;
217 float z = *data.fval++;
218 if( !isfinite(z) ) {
219 z = 0;
220 } else if( z != 0 ) {
221 z = 1/z;
222 }
223 if( z > pvr2_scene.bounds[5] ) {
224 pvr2_scene.bounds[5] = z;
225 } else if( z < pvr2_scene.bounds[4] && z != 0 ) {
226 pvr2_scene.bounds[4] = z;
227 }
228 vert->z = z;
229 data.ival += modify_offset;
232 if( POLY1_TEXTURED(poly1) ) {
233 if( POLY1_UV16(poly1) ) {
234 vert->u = halftofloat( *data.ival>>16 );
235 vert->v = halftofloat( *data.ival );
236 data.ival++;
237 } else {
238 vert->u = *data.fval++;
239 vert->v = *data.fval++;
240 }
241 if( POLY2_TEX_BLEND(poly2) == 1 ) {
242 force_alpha = TRUE;
243 }
244 }
245 unpack_bgra(*data.ival++, vert->rgba);
246 if( POLY1_SPECULAR(poly1) ) {
247 unpack_bgra(*data.ival++, vert->offset_rgba);
248 vert->offset_rgba[3] = 1.0;
249 } else {
250 vert->offset_rgba[0] = 0.0;
251 vert->offset_rgba[1] = 0.0;
252 vert->offset_rgba[2] = 0.0;
253 vert->offset_rgba[3] = 0.0;
254 }
256 if( force_alpha ) {
257 vert->rgba[3] = 1.0;
258 vert->offset_rgba[3] = 1.0;
259 }
260 }
262 /**
263 * Compute texture, colour, and z values for 1 or more result points by interpolating from
264 * a set of 3 input points. The result point(s) must define their x,y.
265 */
266 static void scene_compute_vertexes( struct vertex_struct *result,
267 int result_count,
268 struct vertex_struct *input,
269 gboolean is_solid_shaded )
270 {
271 int i,j;
272 float sx = input[2].x - input[1].x;
273 float sy = input[2].y - input[1].y;
274 float tx = input[0].x - input[1].x;
275 float ty = input[0].y - input[1].y;
277 float detxy = ((sy) * (tx)) - ((ty) * (sx));
278 if( detxy == 0 ) {
279 // If the input points fall on a line, they don't define a usable
280 // polygon - the PVR2 takes the last input point as the result in
281 // this case.
282 for( i=0; i<result_count; i++ ) {
283 float x = result[i].x;
284 float y = result[i].y;
285 memcpy( &result[i], &input[2], sizeof(struct vertex_struct) );
286 result[i].x = x;
287 result[i].y = y;
288 }
289 return;
290 }
291 float sz = input[2].z - input[1].z;
292 float tz = input[0].z - input[1].z;
293 float su = input[2].u - input[1].u;
294 float tu = input[0].u - input[1].u;
295 float sv = input[2].v - input[1].v;
296 float tv = input[0].v - input[1].v;
298 for( i=0; i<result_count; i++ ) {
299 float t = ((result[i].x - input[1].x) * sy -
300 (result[i].y - input[1].y) * sx) / detxy;
301 float s = ((result[i].y - input[1].y) * tx -
302 (result[i].x - input[1].x) * ty) / detxy;
304 float rz = input[1].z + (t*tz) + (s*sz);
305 if( rz > pvr2_scene.bounds[5] ) {
306 pvr2_scene.bounds[5] = rz;
307 } else if( rz < pvr2_scene.bounds[4] ) {
308 pvr2_scene.bounds[4] = rz;
309 }
310 result[i].z = rz;
311 result[i].u = input[1].u + (t*tu) + (s*su);
312 result[i].v = input[1].v + (t*tv) + (s*sv);
314 if( is_solid_shaded ) {
315 memcpy( result->rgba, input[2].rgba, sizeof(result->rgba) );
316 memcpy( result->offset_rgba, input[2].offset_rgba, sizeof(result->offset_rgba) );
317 } else {
318 float *rgba0 = input[0].rgba;
319 float *rgba1 = input[1].rgba;
320 float *rgba2 = input[2].rgba;
321 float *rgba3 = result[i].rgba;
322 for( j=0; j<8; j++ ) {
323 float tc = *rgba0++ - *rgba1;
324 float sc = *rgba2++ - *rgba1;
325 float rc = *rgba1++ + (t*tc) + (s*sc);
326 *rgba3++ = rc;
327 }
328 }
329 }
330 }
332 static void scene_add_vertexes( pvraddr_t poly_idx, int vertex_length,
333 gboolean is_modified )
334 {
335 struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[poly_idx];
336 uint32_t *ptr = &pvr2_scene.pvr2_pbuf[poly_idx];
337 uint32_t *context = ptr;
338 unsigned int i;
340 if( poly->vertex_index == -1 ) {
341 ptr += (is_modified ? 5 : 3 );
342 poly->vertex_index = pvr2_scene.vertex_index;
344 assert( poly != NULL );
345 assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
346 for( i=0; i<poly->vertex_count; i++ ) {
347 pvr2_decode_render_vertex( &pvr2_scene.vertex_array[pvr2_scene.vertex_index++], context[0], context[1], ptr, 0 );
348 ptr += vertex_length;
349 }
350 if( is_modified ) {
351 int mod_offset = (vertex_length - 3)>>1;
352 assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
353 ptr = &pvr2_scene.pvr2_pbuf[poly_idx] + 5;
354 poly->mod_vertex_index = pvr2_scene.vertex_index;
355 for( i=0; i<poly->vertex_count; i++ ) {
356 pvr2_decode_render_vertex( &pvr2_scene.vertex_array[pvr2_scene.vertex_index++], context[0], context[3], ptr, mod_offset );
357 ptr += vertex_length;
358 }
359 }
360 }
361 }
363 static void scene_add_quad_vertexes( pvraddr_t poly_idx, int vertex_length,
364 gboolean is_modified )
365 {
366 struct polygon_struct *poly = pvr2_scene.buf_to_poly_map[poly_idx];
367 uint32_t *ptr = &pvr2_scene.pvr2_pbuf[poly_idx];
368 uint32_t *context = ptr;
369 unsigned int i;
371 if( poly->vertex_index == -1 ) {
372 // Construct it locally and copy to the vertex buffer, as the VBO is
373 // allowed to be horribly slow for reads (ie it could be direct-mapped
374 // vram).
375 struct vertex_struct quad[4];
377 assert( poly != NULL );
378 assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
379 ptr += (is_modified ? 5 : 3 );
380 poly->vertex_index = pvr2_scene.vertex_index;
381 for( i=0; i<4; i++ ) {
382 pvr2_decode_render_vertex( &quad[i], context[0], context[1], ptr, 0 );
383 ptr += vertex_length;
384 }
385 scene_compute_vertexes( &quad[3], 1, &quad[0], !POLY1_GOURAUD_SHADED(context[0]) );
386 // Swap last two vertexes (quad arrangement => tri strip arrangement)
387 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index], quad, sizeof(struct vertex_struct)*2 );
388 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+2], &quad[3], sizeof(struct vertex_struct) );
389 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3], &quad[2], sizeof(struct vertex_struct) );
390 pvr2_scene.vertex_index += 4;
392 if( is_modified ) {
393 int mod_offset = (vertex_length - 3)>>1;
394 assert( pvr2_scene.vertex_index + poly->vertex_count <= pvr2_scene.vertex_count );
395 ptr = &pvr2_scene.pvr2_pbuf[poly_idx] + 5;
396 poly->mod_vertex_index = pvr2_scene.vertex_index;
397 for( i=0; i<4; i++ ) {
398 pvr2_decode_render_vertex( &quad[4], context[0], context[3], ptr, mod_offset );
399 ptr += vertex_length;
400 }
401 scene_compute_vertexes( &quad[3], 1, &quad[0], !POLY1_GOURAUD_SHADED(context[0]) );
402 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index], quad, sizeof(struct vertex_struct)*2 );
403 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+2], &quad[3], sizeof(struct vertex_struct) );
404 memcpy( &pvr2_scene.vertex_array[pvr2_scene.vertex_index+3], &quad[2], sizeof(struct vertex_struct) );
405 pvr2_scene.vertex_index += 4;
406 }
407 }
408 }
410 static void scene_extract_polygons( pvraddr_t tile_entry )
411 {
412 uint32_t *tile_list = (uint32_t *)(video_base+tile_entry);
413 do {
414 uint32_t entry = *tile_list++;
415 if( entry >> 28 == 0x0F ) {
416 break;
417 } else if( entry >> 28 == 0x0E ) {
418 tile_list = (uint32_t *)(video_base + (entry&0x007FFFFF));
419 } else {
420 pvraddr_t polyaddr = entry&0x000FFFFF;
421 int is_modified = (entry & 0x01000000) && pvr2_scene.full_shadow;
422 int vertex_length = (entry >> 21) & 0x07;
423 int context_length = 3;
424 if( is_modified ) {
425 context_length = 5;
426 vertex_length <<= 1 ;
427 }
428 vertex_length += 3;
430 if( (entry & 0xE0000000) == 0x80000000 ) {
431 /* Triangle(s) */
432 int strip_count = ((entry >> 25) & 0x0F)+1;
433 int polygon_length = 3 * vertex_length + context_length;
434 int i;
435 struct polygon_struct *last_poly = NULL;
436 for( i=0; i<strip_count; i++ ) {
437 struct polygon_struct *poly = scene_add_polygon( polyaddr, 3, is_modified );
438 polyaddr += polygon_length;
439 if( last_poly != NULL && last_poly->next == NULL ) {
440 last_poly->next = poly;
441 }
442 last_poly = poly;
443 }
444 } else if( (entry & 0xE0000000) == 0xA0000000 ) {
445 /* Sprite(s) */
446 int strip_count = ((entry >> 25) & 0x0F)+1;
447 int polygon_length = 4 * vertex_length + context_length;
448 int i;
449 struct polygon_struct *last_poly = NULL;
450 for( i=0; i<strip_count; i++ ) {
451 struct polygon_struct *poly = scene_add_polygon( polyaddr, 4, is_modified );
452 polyaddr += polygon_length;
453 if( last_poly != NULL && last_poly->next == NULL ) {
454 last_poly->next = poly;
455 }
456 last_poly = poly;
457 }
458 } else {
459 /* Polygon */
460 int i, last = -1;
461 for( i=5; i>=0; i-- ) {
462 if( entry & (0x40000000>>i) ) {
463 last = i;
464 break;
465 }
466 }
467 if( last != -1 ) {
468 scene_add_polygon( polyaddr, last+3, is_modified );
469 }
470 }
471 }
472 } while( 1 );
473 }
475 static void scene_extract_vertexes( pvraddr_t tile_entry )
476 {
477 uint32_t *tile_list = (uint32_t *)(video_base+tile_entry);
478 do {
479 uint32_t entry = *tile_list++;
480 if( entry >> 28 == 0x0F ) {
481 break;
482 } else if( entry >> 28 == 0x0E ) {
483 tile_list = (uint32_t *)(video_base + (entry&0x007FFFFF));
484 } else {
485 pvraddr_t polyaddr = entry&0x000FFFFF;
486 int is_modified = (entry & 0x01000000) && pvr2_scene.full_shadow;
487 int vertex_length = (entry >> 21) & 0x07;
488 int context_length = 3;
489 if( is_modified ) {
490 context_length = 5;
491 vertex_length <<=1 ;
492 }
493 vertex_length += 3;
495 if( (entry & 0xE0000000) == 0x80000000 ) {
496 /* Triangle(s) */
497 int strip_count = ((entry >> 25) & 0x0F)+1;
498 int polygon_length = 3 * vertex_length + context_length;
499 int i;
500 for( i=0; i<strip_count; i++ ) {
501 scene_add_vertexes( polyaddr, vertex_length, is_modified );
502 polyaddr += polygon_length;
503 }
504 } else if( (entry & 0xE0000000) == 0xA0000000 ) {
505 /* Sprite(s) */
506 int strip_count = ((entry >> 25) & 0x0F)+1;
507 int polygon_length = 4 * vertex_length + context_length;
508 int i;
509 for( i=0; i<strip_count; i++ ) {
510 scene_add_quad_vertexes( polyaddr, vertex_length, is_modified );
511 polyaddr += polygon_length;
512 }
513 } else {
514 /* Polygon */
515 int i, last = -1;
516 for( i=5; i>=0; i-- ) {
517 if( entry & (0x40000000>>i) ) {
518 last = i;
519 break;
520 }
521 }
522 if( last != -1 ) {
523 scene_add_vertexes( polyaddr, vertex_length, is_modified );
524 }
525 }
526 }
527 } while( 1 );
528 }
530 static void scene_extract_background( void )
531 {
532 uint32_t bgplane = MMIO_READ(PVR2, RENDER_BGPLANE);
533 int vertex_length = (bgplane >> 24) & 0x07;
534 int context_length = 3, i;
535 int is_modified = (bgplane & 0x08000000) && pvr2_scene.full_shadow;
537 struct polygon_struct *poly = &pvr2_scene.poly_array[pvr2_scene.poly_count++];
538 uint32_t *context = &pvr2_scene.pvr2_pbuf[(bgplane & 0x00FFFFFF)>>3];
539 poly->context = context;
540 poly->vertex_count = 4;
541 poly->vertex_index = pvr2_scene.vertex_count;
542 if( is_modified ) {
543 context_length = 5;
544 vertex_length <<= 1;
545 poly->mod_vertex_index = pvr2_scene.vertex_count + 4;
546 pvr2_scene.vertex_count += 8;
547 } else {
548 poly->mod_vertex_index = -1;
549 pvr2_scene.vertex_count += 4;
550 }
551 vertex_length += 3;
552 context_length += (bgplane & 0x07) * vertex_length;
554 poly->next = NULL;
555 pvr2_scene.bkgnd_poly = poly;
557 struct vertex_struct base_vertexes[3];
558 uint32_t *ptr = context + context_length;
559 for( i=0; i<3; i++ ) {
560 pvr2_decode_render_vertex( &base_vertexes[i], context[0], context[1],
561 ptr, 0 );
562 ptr += vertex_length;
563 }
564 struct vertex_struct *result_vertexes = &pvr2_scene.vertex_array[poly->vertex_index];
565 result_vertexes[0].x = result_vertexes[0].y = 0;
566 result_vertexes[1].x = result_vertexes[3].x = pvr2_scene.buffer_width;
567 result_vertexes[1].y = result_vertexes[2].x = 0;
568 result_vertexes[2].y = result_vertexes[3].y = pvr2_scene.buffer_height;
569 scene_compute_vertexes( result_vertexes, 4, base_vertexes, !POLY1_GOURAUD_SHADED(context[0]) );
571 if( is_modified ) {
572 int mod_offset = (vertex_length - 3)>>1;
573 ptr = context + context_length;
574 for( i=0; i<3; i++ ) {
575 pvr2_decode_render_vertex( &base_vertexes[i], context[0], context[3],
576 ptr, mod_offset );
577 ptr += vertex_length;
578 }
579 result_vertexes = &pvr2_scene.vertex_array[poly->mod_vertex_index];
580 result_vertexes[0].x = result_vertexes[0].y = 0;
581 result_vertexes[1].x = result_vertexes[3].x = pvr2_scene.buffer_width;
582 result_vertexes[1].y = result_vertexes[2].x = 0;
583 result_vertexes[2].y = result_vertexes[3].y = pvr2_scene.buffer_height;
584 scene_compute_vertexes( result_vertexes, 4, base_vertexes, !POLY1_GOURAUD_SHADED(context[0]) );
585 }
587 }
590 uint32_t pvr2_scene_buffer_width()
591 {
592 return pvr2_scene.buffer_width;
593 }
595 uint32_t pvr2_scene_buffer_height()
596 {
597 return pvr2_scene.buffer_height;
598 }
600 /**
601 * Extract the current scene into the rendering structures. We run two passes
602 * - first pass extracts the polygons into pvr2_scene.poly_array (finding vertex counts),
603 * second pass extracts the vertex data into the VBO/vertex array.
604 *
605 * Difficult to do in single pass as we don't generally know the size of a
606 * polygon for certain until we've seen all tiles containing it. It also means we
607 * can count the vertexes and allocate the appropriate size VBO.
608 *
609 * FIXME: accesses into VRAM need to be bounds-checked properly
610 */
611 void pvr2_scene_read( void )
612 {
613 pvr2_scene_init();
614 pvr2_scene_reset();
616 pvr2_scene.bounds[0] = MMIO_READ( PVR2, RENDER_HCLIP ) & 0x03FF;
617 pvr2_scene.bounds[1] = ((MMIO_READ( PVR2, RENDER_HCLIP ) >> 16) & 0x03FF) + 1;
618 pvr2_scene.bounds[2] = MMIO_READ( PVR2, RENDER_VCLIP ) & 0x03FF;
619 pvr2_scene.bounds[3] = ((MMIO_READ( PVR2, RENDER_VCLIP ) >> 16) & 0x03FF) + 1;
620 pvr2_scene.bounds[4] = pvr2_scene.bounds[5] = MMIO_READF( PVR2, RENDER_FARCLIP );
622 uint32_t *tilebuffer = (uint32_t *)(video_base + MMIO_READ( PVR2, RENDER_TILEBASE ));
623 uint32_t *segment = tilebuffer;
624 pvr2_scene.segment_list = (struct tile_segment *)tilebuffer;
625 pvr2_scene.pvr2_pbuf = (uint32_t *)(video_base + MMIO_READ(PVR2,RENDER_POLYBASE));
626 pvr2_scene.full_shadow = MMIO_READ( PVR2, RENDER_SHADOW ) & 0x100 ? FALSE : TRUE;
628 int max_tile_x = 0;
629 int max_tile_y = 0;
630 int obj_config = MMIO_READ( PVR2, RENDER_OBJCFG );
631 int isp_config = MMIO_READ( PVR2, RENDER_ISPCFG );
633 if( (obj_config & 0x00200000) == 0 ) {
634 if( isp_config & 1 ) {
635 pvr2_scene.sort_mode = SORT_NEVER;
636 } else {
637 pvr2_scene.sort_mode = SORT_ALWAYS;
638 }
639 } else {
640 pvr2_scene.sort_mode = SORT_TILEFLAG;
641 }
643 // Pass 1: Extract polygon list
644 uint32_t control;
645 int i;
646 do {
647 control = *segment++;
648 int tile_x = SEGMENT_X(control);
649 int tile_y = SEGMENT_Y(control);
650 if( tile_x > max_tile_x ) {
651 max_tile_x = tile_x;
652 }
653 if( tile_y > max_tile_y ) {
654 max_tile_y = tile_y;
655 }
656 for( i=0; i<5; i++ ) {
657 if( (*segment & NO_POINTER) == 0 ) {
658 scene_extract_polygons( *segment );
659 }
660 segment++;
661 }
662 } while( (control & SEGMENT_END) == 0 );
664 pvr2_scene.buffer_width = (max_tile_x+1)<<5;
665 pvr2_scene.buffer_height = (max_tile_y+1)<<5;
667 // Pass 2: Extract vertex data
668 vertex_buffer_map();
669 pvr2_scene.vertex_index = 0;
670 segment = tilebuffer;
671 do {
672 control = *segment++;
673 for( i=0; i<5; i++ ) {
674 if( (*segment & NO_POINTER) == 0 ) {
675 scene_extract_vertexes( *segment );
676 }
677 segment++;
678 }
679 } while( (control & SEGMENT_END) == 0 );
681 scene_extract_background();
683 vertex_buffer_unmap();
684 }
686 /**
687 * Dump the current scene to file in a (mostly) human readable form
688 */
689 void pvr2_scene_dump( FILE *f )
690 {
691 int i,j;
693 fprintf( f, "Polygons: %d\n", pvr2_scene.poly_count );
694 for( i=0; i<pvr2_scene.poly_count; i++ ) {
695 struct polygon_struct *poly = &pvr2_scene.poly_array[i];
696 fprintf( f, " %08X ", ((unsigned char *)poly->context) - video_base );
697 switch( poly->vertex_count ) {
698 case 3: fprintf( f, "Tri " ); break;
699 case 4: fprintf( f, "Quad " ); break;
700 default: fprintf( f,"%d-Strip ", poly->vertex_count-2 ); break;
701 }
702 fprintf( f, "%08X %08X %08X ", poly->context[0], poly->context[1], poly->context[2] );
703 if( poly->mod_vertex_index != -1 ) {
704 fprintf( f, "%08X %08X\n", poly->context[3], poly->context[5] );
705 } else {
706 fprintf( f, "\n" );
707 }
709 for( j=0; j<poly->vertex_count; j++ ) {
710 struct vertex_struct *v = &pvr2_scene.vertex_array[poly->vertex_index+j];
711 fprintf( f, " %.5f %.5f %.5f, (%.5f,%.5f) %.5f,%.5f,%.5f,%.5f %.5f %.5f %.5f %.5f\n", v->x, v->y, v->z, v->u, v->v,
712 v->rgba[0], v->rgba[1], v->rgba[2], v->rgba[3],
713 v->offset_rgba[0], v->offset_rgba[1], v->offset_rgba[2], v->offset_rgba[3] );
714 }
715 if( poly->mod_vertex_index != -1 ) {
716 fprintf( f, " ---\n" );
717 for( j=0; j<poly->vertex_count; j++ ) {
718 struct vertex_struct *v = &pvr2_scene.vertex_array[poly->mod_vertex_index+j];
719 fprintf( f, " %.5f %.5f %.5f, (%.5f,%.5f) %.5f,%.5f,%.5f,%.5f %.5f %.5f %.5f %.5f\n", v->x, v->y, v->z, v->u, v->v,
720 v->rgba[0], v->rgba[1], v->rgba[2], v->rgba[3],
721 v->offset_rgba[0], v->offset_rgba[1], v->offset_rgba[2], v->offset_rgba[3] );
722 }
723 }
724 }
726 }
.