lxdream 0.9.1| filename | src/pvr2/texcache.c |
| changeset | 1142:fd82bfba61c4 |
| prev | 1140:7dc1c71ece76 |
| next | 1165:13406c35849b |
| author | nkeynes |
| date | Mon Jan 17 21:22:06 2011 +1000 (13 years ago) |
| permissions | -rw-r--r-- |
| last change | Avoid rebinding textures unnecessarily (actually saves a surprising amount of runtime) |
| view | annotate | diff | log | raw |
1 /**
2 * $Id$
3 *
4 * Texture cache. Responsible for maintaining a working set of OpenGL
5 * textures.
6 *
7 *
8 * Copyright (c) 2005 Nathan Keynes.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 */
21 #include <assert.h>
22 #include <string.h>
23 #include "pvr2/pvr2.h"
24 #include "pvr2/pvr2mmio.h"
25 #include "pvr2/glutil.h"
27 /** Specifies the maximum number of OpenGL
28 * textures we're willing to have open at a time. If more are
29 * needed, textures will be evicted in LRU order.
30 */
31 #define MAX_TEXTURES 256
33 /**
34 * Data structure:
35 *
36 * Main operations:
37 * find entry by texture_addr
38 * add new entry
39 * move entry to tail of lru list
40 * remove entry
41 */
43 typedef signed short texcache_entry_index;
44 #define EMPTY_ENTRY -1
46 static texcache_entry_index texcache_free_ptr = 0;
47 static GLuint texcache_free_list[MAX_TEXTURES];
49 typedef struct texcache_entry {
50 uint32_t texture_addr;
51 uint32_t poly2_mode, tex_mode;
52 GLuint texture_id;
53 render_buffer_t buffer;
54 texcache_entry_index next;
55 uint32_t lru_count;
56 } *texcache_entry_t;
58 static texcache_entry_index texcache_page_lookup[PVR2_RAM_PAGES];
59 static uint32_t texcache_ref_counter;
60 static struct texcache_entry texcache_active_list[MAX_TEXTURES];
61 static uint32_t texcache_palette_mode;
62 static uint32_t texcache_stride_width;
63 static gboolean texcache_have_palette_shader;
64 static gboolean texcache_palette_valid;
65 static GLuint texcache_palette_texid;
67 /**
68 * Initialize the texture cache.
69 */
70 void texcache_init( )
71 {
72 int i;
73 for( i=0; i<PVR2_RAM_PAGES; i++ ) {
74 texcache_page_lookup[i] = EMPTY_ENTRY;
75 }
76 for( i=0; i<MAX_TEXTURES; i++ ) {
77 texcache_free_list[i] = i;
78 texcache_active_list[i].texture_addr = -1;
79 texcache_active_list[i].buffer = NULL;
80 texcache_active_list[i].next = EMPTY_ENTRY;
81 }
82 texcache_free_ptr = 0;
83 texcache_ref_counter = 0;
84 texcache_palette_mode = -1;
85 texcache_stride_width = 0;
86 }
88 /**
89 * Setup the initial texture ids (must be called after the GL context is
90 * prepared)
91 */
92 void texcache_gl_init( )
93 {
94 int i;
95 GLuint texids[MAX_TEXTURES];
97 if( glsl_is_supported() && isGLMultitextureSupported() ) {
98 texcache_have_palette_shader = TRUE;
99 texcache_palette_valid = FALSE;
100 glGenTextures(1, &texcache_palette_texid );
102 /* Bind the texture and set the params */
103 glActiveTexture(GL_TEXTURE1);
104 glBindTexture(GL_TEXTURE_1D, texcache_palette_texid);
105 glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
106 glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
107 glTexParameteri( GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP );
108 glActiveTexture(GL_TEXTURE0);
110 } else {
111 texcache_have_palette_shader = FALSE;
112 }
114 glGenTextures( MAX_TEXTURES, texids );
115 for( i=0; i<MAX_TEXTURES; i++ ) {
116 texcache_active_list[i].texture_id = texids[i];
117 }
118 }
120 void texcache_release_render_buffer( render_buffer_t buffer )
121 {
122 if( !buffer->flushed )
123 pvr2_render_buffer_copy_to_sh4(buffer);
124 pvr2_destroy_render_buffer(buffer);
125 }
127 /**
128 * Flush all textures from the cache, returning them to the free list.
129 */
130 void texcache_flush( )
131 {
132 int i;
133 /* clear structures */
134 for( i=0; i<PVR2_RAM_PAGES; i++ ) {
135 texcache_page_lookup[i] = EMPTY_ENTRY;
136 }
137 for( i=0; i<MAX_TEXTURES; i++ ) {
138 texcache_free_list[i] = i;
139 texcache_active_list[i].next = EMPTY_ENTRY;
140 texcache_active_list[i].texture_addr = -1;
141 if( texcache_active_list[i].buffer != NULL ) {
142 texcache_release_render_buffer(texcache_active_list[i].buffer);
143 texcache_active_list[i].buffer = NULL;
144 }
145 }
146 texcache_free_ptr = 0;
147 texcache_ref_counter = 0;
148 }
150 /**
151 * Flush all textures and delete. The cache will be non-functional until
152 * the next call to texcache_init(). This would typically be done if
153 * switching GL targets.
154 */
155 void texcache_shutdown( )
156 {
157 GLuint texids[MAX_TEXTURES];
158 int i;
159 texcache_flush();
161 if( texcache_have_palette_shader )
162 glDeleteTextures( 1, &texcache_palette_texid );
164 for( i=0; i<MAX_TEXTURES; i++ ) {
165 texids[i] = texcache_active_list[i].texture_id;
166 }
167 glDeleteTextures( MAX_TEXTURES, texids );
168 }
170 static void texcache_evict( int slot )
171 {
172 /* Remove the selected slot from the lookup table */
173 assert( texcache_active_list[slot].texture_addr != -1 );
174 uint32_t evict_page = texcache_active_list[slot].texture_addr >> 12;
175 texcache_entry_index replace_next = texcache_active_list[slot].next;
176 texcache_active_list[slot].texture_addr = -1;
177 texcache_active_list[slot].next = EMPTY_ENTRY; /* Just for safety */
178 if( texcache_active_list[slot].buffer != NULL ) {
179 texcache_release_render_buffer(texcache_active_list[slot].buffer);
180 texcache_active_list[slot].buffer = NULL;
181 }
182 if( texcache_page_lookup[evict_page] == slot ) {
183 texcache_page_lookup[evict_page] = replace_next;
184 } else {
185 texcache_entry_index idx = texcache_page_lookup[evict_page];
186 texcache_entry_index next;
187 do {
188 next = texcache_active_list[idx].next;
189 if( next == slot ) {
190 assert( idx != replace_next );
191 texcache_active_list[idx].next = replace_next;
192 break;
193 }
194 idx = next;
195 } while( next != EMPTY_ENTRY );
196 }
197 }
199 /**
200 * Evict a single texture from the cache.
201 * @return the slot of the evicted texture.
202 */
203 static texcache_entry_index texcache_evict_lru( void )
204 {
205 /* Full table scan - take over the entry with the lowest lru value */
206 texcache_entry_index slot = 0;
207 int lru_value = texcache_active_list[0].lru_count;
208 int i;
209 for( i=1; i<MAX_TEXTURES; i++ ) {
210 /* FIXME: account for rollover */
211 if( texcache_active_list[i].lru_count < lru_value ) {
212 slot = i;
213 lru_value = texcache_active_list[i].lru_count;
214 }
215 }
216 texcache_evict(slot);
218 return slot;
219 }
221 /**
222 * Evict all textures contained in the page identified by a texture address.
223 */
224 void texcache_invalidate_page( uint32_t texture_addr ) {
225 uint32_t texture_page = texture_addr >> 12;
226 texcache_entry_index idx = texcache_page_lookup[texture_page];
227 if( idx == EMPTY_ENTRY )
228 return;
229 assert( texcache_free_ptr >= 0 );
230 do {
231 texcache_entry_t entry = &texcache_active_list[idx];
232 entry->texture_addr = -1;
233 if( entry->buffer != NULL ) {
234 texcache_release_render_buffer(entry->buffer);
235 entry->buffer = NULL;
236 }
237 /* release entry */
238 texcache_free_ptr--;
239 texcache_free_list[texcache_free_ptr] = idx;
240 idx = entry->next;
241 entry->next = EMPTY_ENTRY;
242 } while( idx != EMPTY_ENTRY );
243 texcache_page_lookup[texture_page] = EMPTY_ENTRY;
244 }
246 /**
247 * Load the palette into 4 textures of 256 entries each. This mirrors the
248 * banking done by the PVR2 for 8-bit textures, and also ensures that we
249 * can use 8-bit paletted textures ourselves.
250 */
251 static void texcache_load_palette_texture( gboolean format_changed )
252 {
253 GLint format, type, intFormat = GL_RGBA;
254 unsigned i;
255 int bpp = 2;
256 uint32_t *palette = (uint32_t *)mmio_region_PVR2PAL.mem;
257 uint16_t packed_palette[1024];
258 char *data = (char *)palette;
260 switch( texcache_palette_mode ) {
261 case 0: /* ARGB1555 */
262 format = GL_BGRA;
263 type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
264 break;
265 case 1: /* RGB565 */
266 intFormat = GL_RGB;
267 format = GL_RGB;
268 type = GL_UNSIGNED_SHORT_5_6_5;
269 break;
270 case 2: /* ARGB4444 */
271 format = GL_BGRA;
272 type = GL_UNSIGNED_SHORT_4_4_4_4_REV;
273 break;
274 case 3: /* ARGB8888 */
275 format = GL_BGRA;
276 type = GL_UNSIGNED_BYTE;
277 bpp = 4;
278 break;
279 default:
280 break; /* Can't happen */
281 }
284 if( bpp == 2 ) {
285 for( i=0; i<1024; i++ ) {
286 packed_palette[i] = (uint16_t)palette[i];
287 }
288 data = (char *)packed_palette;
290 }
292 glActiveTexture(GL_TEXTURE1);
293 // glBindTexture(GL_TEXTURE_1D, texcache_palette_texid);
294 if( format_changed )
295 glTexImage1D(GL_TEXTURE_1D, 0, intFormat, 1024, 0, format, type, data );
296 else
297 glTexSubImage1D(GL_TEXTURE_1D, 0, 0, 1024, format, type, data);
298 // glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
299 // glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
300 // glTexParameteri( GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP );
301 glActiveTexture(GL_TEXTURE0);
302 texcache_palette_valid = TRUE;
303 }
306 /**
307 * Mark the palette as having changed. If we have palette support (via shaders)
308 * we just flag the palette, otherwise we have to invalidate all palette
309 * textures.
310 */
311 void texcache_invalidate_palette( )
312 {
313 if( texcache_have_palette_shader ) {
314 texcache_palette_valid = FALSE;
315 } else {
316 int i;
317 for( i=0; i<MAX_TEXTURES; i++ ) {
318 if( texcache_active_list[i].texture_addr != -1 &&
319 PVR2_TEX_IS_PALETTE(texcache_active_list[i].tex_mode) ) {
320 texcache_evict( i );
321 texcache_free_ptr--;
322 texcache_free_list[texcache_free_ptr] = i;
323 }
324 }
325 }
326 }
327 /**
328 * Mark all stride textures as needing a re-read (ie when the stride width
329 * is changed).
330 */
331 void texcache_invalidate_stride( )
332 {
333 int i;
334 for( i=0; i<MAX_TEXTURES; i++ ) {
335 if( texcache_active_list[i].texture_addr != -1 &&
336 PVR2_TEX_IS_STRIDE(texcache_active_list[i].tex_mode) ) {
337 texcache_evict( i );
338 texcache_free_ptr--;
339 texcache_free_list[texcache_free_ptr] = i;
340 }
341 }
342 }
344 void texcache_begin_scene( uint32_t palette_mode, uint32_t stride )
345 {
346 gboolean format_changed = FALSE;
347 if( palette_mode != texcache_palette_mode ) {
348 texcache_invalidate_palette();
349 format_changed = TRUE;
350 }
351 if( stride != texcache_stride_width )
352 texcache_invalidate_stride();
354 texcache_palette_mode = palette_mode;
355 texcache_stride_width = stride;
357 if( !texcache_palette_valid && texcache_have_palette_shader )
358 texcache_load_palette_texture(format_changed);
359 }
361 static void decode_pal8_to_32( uint32_t *out, uint8_t *in, int inbytes, uint32_t *pal )
362 {
363 int i;
364 for( i=0; i<inbytes; i++ ) {
365 *out++ = pal[*in++];
366 }
367 }
369 static void decode_pal8_to_16( uint16_t *out, uint8_t *in, int inbytes, uint32_t *pal )
370 {
371 int i;
372 for( i=0; i<inbytes; i++ ) {
373 *out++ = (uint16_t)pal[*in++];
374 }
375 }
377 static void decode_pal4_to_32( uint32_t *out, uint8_t *in, int inbytes, uint32_t *pal )
378 {
379 int i;
380 for( i=0; i<inbytes; i++ ) {
381 *out++ = pal[*in & 0x0F];
382 *out++ = pal[(*in >> 4)];
383 in++;
384 }
385 }
387 static void decode_pal4_to_pal8( uint8_t *out, uint8_t *in, int inbytes )
388 {
389 int i;
390 for( i=0; i<inbytes; i++ ) {
391 *out++ = (uint8_t)(*in & 0x0F);
392 *out++ = (uint8_t)(*in >> 4);
393 in++;
394 }
395 }
399 static void decode_pal4_to_16( uint16_t *out, uint8_t *in, int inbytes, uint32_t *pal )
400 {
401 int i;
402 for( i=0; i<inbytes; i++ ) {
403 *out++ = (uint16_t)pal[*in & 0x0F];
404 *out++ = (uint16_t)pal[(*in >> 4)];
405 in++;
406 }
407 }
409 #define VQ_CODEBOOK_SIZE 2048 /* 256 entries * 4 pixels per quad * 2 byte pixels */
411 struct vq_codebook {
412 uint16_t quad[256][4];
413 };
415 static void vq_get_codebook( struct vq_codebook *codebook,
416 uint16_t *input )
417 {
418 /* Detwiddle the codebook, for the sake of my own sanity if nothing else */
419 uint16_t *p = (uint16_t *)input;
420 int i;
421 for( i=0; i<256; i++ ) {
422 codebook->quad[i][0] = *p++;
423 codebook->quad[i][2] = *p++;
424 codebook->quad[i][1] = *p++;
425 codebook->quad[i][3] = *p++;
426 }
427 }
429 static void vq_decode( uint16_t *output, unsigned char *input, int width, int height,
430 struct vq_codebook *codebook ) {
431 int i,j;
433 uint8_t *c = (uint8_t *)input;
434 for( j=0; j<height; j+=2 ) {
435 for( i=0; i<width; i+=2 ) {
436 uint8_t code = *c++;
437 output[i + j*width] = codebook->quad[code][0];
438 output[i + 1 + j*width] = codebook->quad[code][1];
439 output[i + (j+1)*width] = codebook->quad[code][2];
440 output[i + 1 + (j+1)*width] = codebook->quad[code][3];
441 }
442 }
443 }
445 static inline uint32_t yuv_to_rgb32( float y, float u, float v )
446 {
447 u -= 128;
448 v -= 128;
449 int r = (int)(y + v*1.375);
450 int g = (int)(y - u*0.34375 - v*0.6875);
451 int b = (int)(y + u*1.71875);
452 if( r > 255 ) { r = 255; } else if( r < 0 ) { r = 0; }
453 if( g > 255 ) { g = 255; } else if( g < 0 ) { g = 0; }
454 if( b > 255 ) { b = 255; } else if( b < 0 ) { b = 0; }
455 return 0xFF000000 | (r<<16) | (g<<8) | (b);
456 }
459 /**
460 * Convert raster YUV texture data into RGB32 data - most GL implementations don't
461 * directly support this format unfortunately. The input data is formatted as
462 * 32 bits = 2 horizontal pixels, UYVY. This is currently done rather inefficiently
463 * in floating point.
464 */
465 static void yuv_decode( uint32_t *output, uint32_t *input, int width, int height )
466 {
467 int x, y;
468 uint32_t *p = input;
469 for( y=0; y<height; y++ ) {
470 for( x=0; x<width; x+=2 ) {
471 float u = (float)(*p & 0xFF);
472 float y0 = (float)( (*p>>8)&0xFF );
473 float v = (float)( (*p>>16)&0xFF );
474 float y1 = (float)( (*p>>24)&0xFF );
475 *output++ = yuv_to_rgb32( y0, u, v );
476 *output++ = yuv_to_rgb32( y1, u, v );
477 p++;
478 }
479 }
480 }
482 static gboolean is_npot_texture( int width )
483 {
484 while( width != 0 ) {
485 if( width & 1 )
486 return width != 1;
487 width >>= 1;
488 }
489 return TRUE;
490 }
492 /**
493 * Load texture data from the given address and parameters into the currently
494 * bound OpenGL texture.
495 */
496 static void texcache_load_texture( uint32_t texture_addr, int width, int height,
497 int mode ) {
498 int bpp_shift = 1; /* bytes per (output) pixel as a power of 2 */
499 GLint intFormat = GL_RGBA, format, type;
500 int tex_format = mode & PVR2_TEX_FORMAT_MASK;
501 struct vq_codebook codebook;
502 GLint min_filter = GL_LINEAR;
503 GLint max_filter = GL_LINEAR;
504 GLint mipmapfilter = GL_LINEAR_MIPMAP_LINEAR;
506 glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
508 /* Decode the format parameters */
509 switch( tex_format ) {
510 case PVR2_TEX_FORMAT_IDX4:
511 case PVR2_TEX_FORMAT_IDX8:
512 if( texcache_have_palette_shader ) {
513 intFormat = GL_ALPHA8;
514 format = GL_ALPHA;
515 type = GL_UNSIGNED_BYTE;
516 bpp_shift = 0;
517 min_filter = max_filter = GL_NEAREST;
518 mipmapfilter = GL_NEAREST_MIPMAP_NEAREST;
519 } else {
520 /* For indexed-colour modes, we need to lookup the palette control
521 * word to determine the de-indexed texture format.
522 */
523 switch( texcache_palette_mode ) {
524 case 0: /* ARGB1555 */
525 format = GL_BGRA;
526 type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
527 break;
528 case 1: /* RGB565 */
529 intFormat = GL_RGB;
530 format = GL_RGB;
531 type = GL_UNSIGNED_SHORT_5_6_5;
532 break;
533 case 2: /* ARGB4444 */
534 format = GL_BGRA;
535 type = GL_UNSIGNED_SHORT_4_4_4_4_REV;
536 break;
537 case 3: /* ARGB8888 */
538 format = GL_BGRA;
539 type = GL_UNSIGNED_BYTE;
540 bpp_shift = 2;
541 break;
542 default:
543 return; /* Can't happen, but it makes gcc stop complaining */
544 }
545 }
546 break;
548 default:
549 case PVR2_TEX_FORMAT_ARGB1555:
550 format = GL_BGRA;
551 type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
552 break;
553 case PVR2_TEX_FORMAT_RGB565:
554 intFormat = GL_RGB;
555 format = GL_RGB;
556 type = GL_UNSIGNED_SHORT_5_6_5;
557 break;
558 case PVR2_TEX_FORMAT_ARGB4444:
559 format = GL_BGRA;
560 type = GL_UNSIGNED_SHORT_4_4_4_4_REV;
561 break;
562 case PVR2_TEX_FORMAT_YUV422:
563 /* YUV422 isn't directly supported by most implementations, so decode
564 * it to a (reasonably) standard ARGB32.
565 */
566 bpp_shift = 2;
567 format = GL_BGRA;
568 type = GL_UNSIGNED_BYTE;
569 break;
570 case PVR2_TEX_FORMAT_BUMPMAP:
571 WARN( "Bumpmap not supported" );
572 return;
573 }
575 if( PVR2_TEX_IS_STRIDE(mode) && tex_format != PVR2_TEX_FORMAT_IDX4 &&
576 tex_format != PVR2_TEX_FORMAT_IDX8 ) {
577 /* Stride textures cannot be mip-mapped, compressed, indexed or twiddled */
578 unsigned char data[(width*height) << bpp_shift];
579 if( tex_format == PVR2_TEX_FORMAT_YUV422 ) {
580 unsigned char tmp[(width*height)<<1];
581 pvr2_vram64_read_stride( tmp, width<<1, texture_addr, texcache_stride_width<<1, height );
582 yuv_decode( (uint32_t *)data, (uint32_t *)tmp, width, height );
583 } else {
584 pvr2_vram64_read_stride( data, width<<bpp_shift, texture_addr, texcache_stride_width<<bpp_shift, height );
585 }
586 glTexImage2D( GL_TEXTURE_2D, 0, intFormat, width, height, 0, format, type, data );
587 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter);
588 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, max_filter);
589 return;
590 }
592 if( PVR2_TEX_IS_COMPRESSED(mode) ) {
593 uint16_t tmp[VQ_CODEBOOK_SIZE];
594 pvr2_vram64_read( (unsigned char *)tmp, texture_addr, VQ_CODEBOOK_SIZE );
595 texture_addr += VQ_CODEBOOK_SIZE;
596 vq_get_codebook( &codebook, tmp );
597 }
599 int level=0, last_level = 0, mip_width = width, mip_height = height, src_bytes, dest_bytes;
600 if( PVR2_TEX_IS_MIPMAPPED(mode) ) {
601 uint32_t src_offset = 0;
602 min_filter = mipmapfilter;
603 mip_height = height = width;
604 while( (1<<last_level) < width ) {
605 last_level++;
606 src_offset += ((width>>last_level)*(width>>last_level));
607 }
608 if( width != 1 ) {
609 src_offset += 3;
610 }
611 if( PVR2_TEX_IS_COMPRESSED(mode) ) {
612 src_offset >>= 2;
613 } else if( tex_format == PVR2_TEX_FORMAT_IDX4 ) {
614 src_offset >>= 1;
615 } else if( tex_format == PVR2_TEX_FORMAT_YUV422 ) {
616 src_offset <<= 1;
617 } else if( tex_format != PVR2_TEX_FORMAT_IDX8 ) {
618 src_offset <<= bpp_shift;
619 }
620 texture_addr += src_offset;
621 }
624 dest_bytes = (mip_width * mip_height) << bpp_shift;
625 src_bytes = dest_bytes; // Modes will change this (below)
627 for( level=0; level<= last_level; level++ ) {
628 unsigned char data[dest_bytes];
629 /* load data from image, detwiddling/uncompressing as required */
630 if( tex_format == PVR2_TEX_FORMAT_IDX8 ) {
631 if( texcache_have_palette_shader ) {
632 pvr2_vram64_read_twiddled_8( data, texture_addr, mip_width, mip_height );
633 } else {
634 src_bytes = (mip_width * mip_height);
635 int bank = (mode >> 25) &0x03;
636 uint32_t *palette = ((uint32_t *)mmio_region_PVR2PAL.mem) + (bank<<8);
637 unsigned char tmp[src_bytes];
638 pvr2_vram64_read_twiddled_8( tmp, texture_addr, mip_width, mip_height );
639 if( bpp_shift == 2 ) {
640 decode_pal8_to_32( (uint32_t *)data, tmp, src_bytes, palette );
641 } else {
642 decode_pal8_to_16( (uint16_t *)data, tmp, src_bytes, palette );
643 }
644 }
645 } else if( tex_format == PVR2_TEX_FORMAT_IDX4 ) {
646 src_bytes = (mip_width * mip_height) >> 1;
647 unsigned char tmp[src_bytes];
648 if( texcache_have_palette_shader ) {
649 pvr2_vram64_read_twiddled_4( tmp, texture_addr, mip_width, mip_height );
650 decode_pal4_to_pal8( data, tmp, src_bytes );
651 } else {
652 int bank = (mode >>21 ) & 0x3F;
653 uint32_t *palette = ((uint32_t *)mmio_region_PVR2PAL.mem) + (bank<<4);
654 pvr2_vram64_read_twiddled_4( tmp, texture_addr, mip_width, mip_height );
655 if( bpp_shift == 2 ) {
656 decode_pal4_to_32( (uint32_t *)data, tmp, src_bytes, palette );
657 } else {
658 decode_pal4_to_16( (uint16_t *)data, tmp, src_bytes, palette );
659 }
660 }
661 } else if( tex_format == PVR2_TEX_FORMAT_YUV422 ) {
662 src_bytes = ((mip_width*mip_height)<<1);
663 unsigned char tmp[src_bytes];
664 if( PVR2_TEX_IS_TWIDDLED(mode) ) {
665 pvr2_vram64_read_twiddled_16( tmp, texture_addr, mip_width, mip_height );
666 } else {
667 pvr2_vram64_read( tmp, texture_addr, src_bytes );
668 }
669 yuv_decode( (uint32_t *)data, (uint32_t *)tmp, mip_width, mip_height );
670 } else if( PVR2_TEX_IS_COMPRESSED(mode) ) {
671 src_bytes = ((mip_width*mip_height) >> 2);
672 unsigned char tmp[src_bytes];
673 if( PVR2_TEX_IS_TWIDDLED(mode) ) {
674 pvr2_vram64_read_twiddled_8( tmp, texture_addr, mip_width>>1, mip_height>>1 );
675 } else {
676 pvr2_vram64_read( tmp, texture_addr, src_bytes );
677 }
678 vq_decode( (uint16_t *)data, tmp, mip_width, mip_height, &codebook );
679 } else if( PVR2_TEX_IS_TWIDDLED(mode) ) {
680 pvr2_vram64_read_twiddled_16( data, texture_addr, mip_width, mip_height );
681 } else {
682 pvr2_vram64_read( data, texture_addr, src_bytes );
683 }
685 /* Pass to GL */
686 if( level == last_level && level != 0 ) { /* 1x1 stored within a 2x2 */
687 glTexImage2D( GL_TEXTURE_2D, level, intFormat, 1, 1, 0, format, type,
688 data + (3 << bpp_shift) );
689 } else {
690 glTexImage2D( GL_TEXTURE_2D, level, intFormat, mip_width, mip_height, 0, format, type,
691 data );
692 if( mip_width > 2 ) {
693 mip_width >>= 1;
694 mip_height >>= 1;
695 dest_bytes >>= 2;
696 src_bytes >>= 2;
697 }
698 texture_addr -= src_bytes;
699 }
700 }
702 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min_filter);
703 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, max_filter);
704 }
706 static int texcache_find_texture_slot( uint32_t poly2_masked_word, uint32_t texture_word )
707 {
708 uint32_t texture_addr = (texture_word & 0x000FFFFF)<<3;
709 uint32_t texture_page = texture_addr >> 12;
710 texcache_entry_index next;
711 texcache_entry_index idx = texcache_page_lookup[texture_page];
712 while( idx != EMPTY_ENTRY ) {
713 texcache_entry_t entry = &texcache_active_list[idx];
714 if( entry->tex_mode == texture_word &&
715 entry->poly2_mode == poly2_masked_word ) {
716 entry->lru_count = texcache_ref_counter++;
717 return idx;
718 }
719 idx = entry->next;
720 }
721 return -1;
722 }
724 static int texcache_alloc_texture_slot( uint32_t poly2_word, uint32_t texture_word )
725 {
726 uint32_t texture_addr = (texture_word & 0x000FFFFF)<<3;
727 uint32_t texture_page = texture_addr >> 12;
728 texcache_entry_index slot = 0;
730 if( texcache_free_ptr < MAX_TEXTURES ) {
731 slot = texcache_free_list[texcache_free_ptr++];
732 } else {
733 slot = texcache_evict_lru();
734 }
736 /* Construct new entry */
737 assert( texcache_active_list[slot].texture_addr == -1 );
738 texcache_active_list[slot].texture_addr = texture_addr;
739 texcache_active_list[slot].tex_mode = texture_word;
740 texcache_active_list[slot].poly2_mode = poly2_word;
741 texcache_active_list[slot].lru_count = texcache_ref_counter++;
743 /* Add entry to the lookup table */
744 int next = texcache_page_lookup[texture_page];
745 if( next == slot ) {
746 int i;
747 fprintf( stderr, "Active list: " );
748 for( i=0; i<MAX_TEXTURES; i++ ) {
749 fprintf( stderr, "%d, ", texcache_active_list[i].next );
750 }
751 fprintf( stderr, "\n" );
752 assert( next != slot );
754 }
755 texcache_active_list[slot].next = next;
756 texcache_page_lookup[texture_page] = slot;
757 return slot;
758 }
760 /**
761 * Return a texture ID for the texture specified at the supplied address
762 * and given parameters (the same sequence of bytes could in theory have
763 * multiple interpretations). We use the texture address as the primary
764 * index, but allow for multiple instances at each address.
765 *
766 * If the texture has already been bound, return the ID to which it was
767 * bound. Otherwise obtain an unused texture ID and set it up appropriately.
768 * The current GL_TEXTURE_2D binding will be changed in this case.
769 */
770 GLuint texcache_get_texture( uint32_t poly2_word, uint32_t texture_word )
771 {
772 poly2_word &= 0x000F803F; /* Get just the texture-relevant bits */
773 uint32_t texture_lookup = texture_word;
774 if( PVR2_TEX_IS_PALETTE(texture_lookup) ) {
775 texture_lookup &= 0xF81FFFFF; /* Mask out the bank bits */
776 }
777 int slot = texcache_find_texture_slot( poly2_word, texture_lookup );
779 if( slot == -1 ) {
780 /* Not found - check the free list */
781 slot = texcache_alloc_texture_slot( poly2_word, texture_lookup );
783 /* Construct the GL texture */
784 uint32_t texture_addr = (texture_word & 0x000FFFFF)<<3;
785 unsigned width = POLY2_TEX_WIDTH(poly2_word);
786 unsigned height = POLY2_TEX_HEIGHT(poly2_word);
788 glBindTexture( GL_TEXTURE_2D, texcache_active_list[slot].texture_id );
789 texcache_load_texture( texture_addr, width, height, texture_word );
791 /* Set texture parameters from the poly2 word */
792 if( POLY2_TEX_CLAMP_U(poly2_word) ) {
793 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
794 } else if( POLY2_TEX_MIRROR_U(poly2_word) ) {
795 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT_ARB );
796 } else {
797 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
798 }
799 if( POLY2_TEX_CLAMP_V(poly2_word) ) {
800 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );
801 } else if( POLY2_TEX_MIRROR_V(poly2_word) ) {
802 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT_ARB );
803 } else {
804 glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
805 }
806 }
808 return texcache_active_list[slot].texture_id;
809 }
811 #if 0
812 render_buffer_t texcache_get_render_buffer( uint32_t texture_addr, int mode, int width, int height )
813 {
814 uint32_t texture_word = ((texture_addr >> 3) & 0x000FFFFF) | PVR2_TEX_UNTWIDDLED;
815 switch( mode ) {
816 case COLFMT_BGRA1555: texture_word |= PVR2_TEX_FORMAT_ARGB1555; break;
817 case COLFMT_RGB565: texture_word |= PVR2_TEX_FORMAT_RGB565; break;
818 case COLFMT_BGRA4444: texture_word |= PVR2_TEX_FORMAT_ARGB4444; break;
819 default:
820 WARN( "Rendering to non-texture colour format" );
821 }
822 if( is_npot_texture(width) )
823 texture_word |= PVR2_TEX_STRIDE;
826 int slot = texcache_find_texture_slot( texture_word, width, height );
827 if( slot == -1 ) {
828 slot = texcache_alloc_texture_slot( texture_word, width, height );
829 }
831 texcache_entry_t entry = &texcache_active_list[slot];
833 if( entry->buffer == NULL ) {
834 entry->buffer = pvr2_create_render_buffer( texture_addr, width, height, entry->texture_id );
835 } else if( entry->buffer->width != width || entry->buffer->height != height ) {
836 texcache_release_render_buffer(entry->buffer);
837 entry->buffer = pvr2_create_render_buffer( texture_addr, width, height, entry->texture_id );
838 }
840 return entry->buffer;
841 }
842 #endif
844 /**
845 * Check the integrity of the texcache. Verifies that every cache slot
846 * appears exactly once on either the free list or one page list. For
847 * active slots, the texture address must also match the page it appears on.
848 *
849 */
850 void texcache_integrity_check()
851 {
852 int i;
853 int slot_found[MAX_TEXTURES];
855 memset( slot_found, 0, sizeof(slot_found) );
857 /* Check entries on the free list */
858 for( i= texcache_free_ptr; i< MAX_TEXTURES; i++ ) {
859 int slot = texcache_free_list[i];
860 assert( slot_found[slot] == 0 );
861 assert( texcache_active_list[slot].next == EMPTY_ENTRY );
862 slot_found[slot] = 1;
863 }
865 /* Check entries on the active lists */
866 for( i=0; i< PVR2_RAM_PAGES; i++ ) {
867 int slot = texcache_page_lookup[i];
868 while( slot != EMPTY_ENTRY ) {
869 assert( slot_found[slot] == 0 );
870 assert( (texcache_active_list[slot].texture_addr >> 12) == i );
871 slot_found[slot] = 2;
872 slot = texcache_active_list[slot].next;
873 }
874 }
876 /* Make sure we didn't miss any entries */
877 for( i=0; i<MAX_TEXTURES; i++ ) {
878 assert( slot_found[i] != 0 );
879 }
880 }
882 /**
883 * Dump the contents of the texture cache
884 */
885 void texcache_dump()
886 {
887 unsigned i;
888 for( i=0; i< PVR2_RAM_PAGES; i++ ) {
889 int slot = texcache_page_lookup[i];
890 while( slot != EMPTY_ENTRY ) {
891 fprintf( stderr, "%-3d: %08X %dx%d (%08X %08X)\n", slot,
892 texcache_active_list[slot].texture_addr,
893 POLY2_TEX_WIDTH(texcache_active_list[slot].poly2_mode),
894 POLY2_TEX_HEIGHT(texcache_active_list[slot].poly2_mode),
895 texcache_active_list[slot].poly2_mode,
896 texcache_active_list[slot].tex_mode );
897 slot = texcache_active_list[slot].next;
898 }
899 }
900 }
902 void texcache_print_idx4( uint32_t texture_addr, int width )
903 {
904 unsigned x,y;
905 int src_bytes = (width*width>>1);
906 char tmp[src_bytes];
907 char data[width*width];
908 pvr2_vram64_read_twiddled_4( tmp, texture_addr, width, width );
909 decode_pal4_to_pal8( data, tmp, src_bytes );
910 for( y=0; y<width; y++ ) {
911 for( x=0; x<width; x++ ) {
912 printf( "%1x", data[y*width+x] );
913 }
914 printf( "\n" );
915 }
916 }
.