nkeynes@103 | 1 | /**
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nkeynes@224 | 2 | * $Id: texcache.c,v 1.8 2006-09-12 13:33:18 nkeynes Exp $
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nkeynes@103 | 3 | *
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nkeynes@103 | 4 | * Texture cache. Responsible for maintaining a working set of OpenGL
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nkeynes@103 | 5 | * textures.
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nkeynes@103 | 6 | *
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nkeynes@103 | 7 | *
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nkeynes@103 | 8 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@103 | 9 | *
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nkeynes@103 | 10 | * This program is free software; you can redistribute it and/or modify
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nkeynes@103 | 11 | * it under the terms of the GNU General Public License as published by
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nkeynes@103 | 12 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@103 | 13 | * (at your option) any later version.
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nkeynes@103 | 14 | *
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nkeynes@103 | 15 | * This program is distributed in the hope that it will be useful,
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nkeynes@103 | 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@103 | 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@103 | 18 | * GNU General Public License for more details.
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nkeynes@103 | 19 | */
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nkeynes@103 | 20 |
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nkeynes@103 | 21 | #include <assert.h>
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nkeynes@103 | 22 | #include "pvr2/pvr2.h"
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nkeynes@103 | 23 |
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nkeynes@103 | 24 | /** Specifies the maximum number of OpenGL
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nkeynes@103 | 25 | * textures we're willing to have open at a time. If more are
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nkeynes@103 | 26 | * needed, textures will be evicted in LRU order.
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nkeynes@103 | 27 | */
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nkeynes@103 | 28 | #define MAX_TEXTURES 64
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nkeynes@103 | 29 |
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nkeynes@103 | 30 | /**
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nkeynes@103 | 31 | * Data structure:
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nkeynes@103 | 32 | *
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nkeynes@103 | 33 | * Main operations:
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nkeynes@103 | 34 | * find entry by texture_addr
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nkeynes@103 | 35 | * add new entry
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nkeynes@103 | 36 | * move entry to tail of lru list
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nkeynes@103 | 37 | * remove entry
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nkeynes@103 | 38 | */
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nkeynes@103 | 39 |
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nkeynes@103 | 40 | typedef signed short texcache_entry_index;
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nkeynes@107 | 41 | #define EMPTY_ENTRY 0xFF
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nkeynes@103 | 42 |
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nkeynes@107 | 43 | static texcache_entry_index texcache_free_ptr = 0;
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nkeynes@103 | 44 | static GLuint texcache_free_list[MAX_TEXTURES];
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nkeynes@103 | 45 |
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nkeynes@103 | 46 | typedef struct texcache_entry {
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nkeynes@103 | 47 | uint32_t texture_addr;
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nkeynes@103 | 48 | int width, height, mode;
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nkeynes@103 | 49 | GLuint texture_id;
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nkeynes@103 | 50 | texcache_entry_index next;
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nkeynes@103 | 51 | uint32_t lru_count;
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nkeynes@103 | 52 | } *texcache_entry_t;
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nkeynes@103 | 53 |
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nkeynes@103 | 54 | static uint8_t texcache_page_lookup[PVR2_RAM_PAGES];
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nkeynes@103 | 55 | static uint32_t texcache_ref_counter;
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nkeynes@103 | 56 | static struct texcache_entry texcache_active_list[MAX_TEXTURES];
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nkeynes@103 | 57 |
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nkeynes@103 | 58 | /**
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nkeynes@108 | 59 | * Initialize the texture cache.
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nkeynes@103 | 60 | */
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nkeynes@103 | 61 | void texcache_init( )
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nkeynes@103 | 62 | {
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nkeynes@103 | 63 | int i;
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nkeynes@103 | 64 | for( i=0; i<PVR2_RAM_PAGES; i++ ) {
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nkeynes@103 | 65 | texcache_page_lookup[i] = EMPTY_ENTRY;
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nkeynes@103 | 66 | }
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nkeynes@103 | 67 | for( i=0; i<MAX_TEXTURES; i++ ) {
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nkeynes@103 | 68 | texcache_free_list[i] = i;
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nkeynes@103 | 69 | }
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nkeynes@103 | 70 | texcache_free_ptr = 0;
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nkeynes@103 | 71 | texcache_ref_counter = 0;
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nkeynes@103 | 72 | }
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nkeynes@103 | 73 |
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nkeynes@103 | 74 | /**
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nkeynes@108 | 75 | * Setup the initial texture ids (must be called after the GL context is
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nkeynes@108 | 76 | * prepared)
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nkeynes@108 | 77 | */
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nkeynes@108 | 78 | void texcache_gl_init( )
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nkeynes@108 | 79 | {
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nkeynes@108 | 80 | int i;
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nkeynes@108 | 81 | GLuint texids[MAX_TEXTURES];
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nkeynes@108 | 82 |
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nkeynes@108 | 83 | glGenTextures( MAX_TEXTURES, texids );
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nkeynes@108 | 84 | for( i=0; i<MAX_TEXTURES; i++ ) {
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nkeynes@108 | 85 | texcache_active_list[i].texture_id = texids[i];
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nkeynes@108 | 86 | }
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nkeynes@108 | 87 | }
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nkeynes@108 | 88 |
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nkeynes@108 | 89 | /**
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nkeynes@103 | 90 | * Flush all textures from the cache, returning them to the free list.
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nkeynes@103 | 91 | */
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nkeynes@103 | 92 | void texcache_flush( )
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nkeynes@103 | 93 | {
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nkeynes@103 | 94 | int i;
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nkeynes@103 | 95 | /* clear structures */
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nkeynes@103 | 96 | for( i=0; i<PVR2_RAM_PAGES; i++ ) {
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nkeynes@103 | 97 | texcache_page_lookup[i] = EMPTY_ENTRY;
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nkeynes@103 | 98 | }
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nkeynes@103 | 99 | for( i=0; i<MAX_TEXTURES; i++ ) {
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nkeynes@103 | 100 | texcache_free_list[i] = i;
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nkeynes@103 | 101 | }
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nkeynes@103 | 102 | texcache_free_ptr = 0;
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nkeynes@103 | 103 | texcache_ref_counter = 0;
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nkeynes@103 | 104 | }
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nkeynes@103 | 105 |
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nkeynes@103 | 106 | /**
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nkeynes@103 | 107 | * Flush all textures and delete. The cache will be non-functional until
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nkeynes@103 | 108 | * the next call to texcache_init(). This would typically be done if
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nkeynes@103 | 109 | * switching GL targets.
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nkeynes@103 | 110 | */
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nkeynes@103 | 111 | void texcache_shutdown( )
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nkeynes@103 | 112 | {
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nkeynes@103 | 113 | GLuint texids[MAX_TEXTURES];
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nkeynes@103 | 114 | int i;
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nkeynes@103 | 115 | texcache_flush();
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nkeynes@103 | 116 |
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nkeynes@103 | 117 | for( i=0; i<MAX_TEXTURES; i++ ) {
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nkeynes@103 | 118 | texids[i] = texcache_active_list[i].texture_id;
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nkeynes@103 | 119 | }
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nkeynes@103 | 120 | glDeleteTextures( MAX_TEXTURES, texids );
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nkeynes@103 | 121 | }
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nkeynes@103 | 122 |
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nkeynes@103 | 123 | /**
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nkeynes@103 | 124 | * Evict all textures contained in the page identified by a texture address.
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nkeynes@103 | 125 | */
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nkeynes@103 | 126 | void texcache_invalidate_page( uint32_t texture_addr ) {
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nkeynes@103 | 127 | uint32_t texture_page = texture_addr >> 12;
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nkeynes@103 | 128 | texcache_entry_index idx = texcache_page_lookup[texture_page];
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nkeynes@103 | 129 | if( idx == EMPTY_ENTRY )
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nkeynes@103 | 130 | return;
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nkeynes@107 | 131 | assert( texcache_free_ptr >= 0 );
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nkeynes@103 | 132 | do {
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nkeynes@103 | 133 | texcache_entry_t entry = &texcache_active_list[idx];
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nkeynes@103 | 134 | /* release entry */
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nkeynes@103 | 135 | texcache_free_ptr--;
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nkeynes@103 | 136 | texcache_free_list[texcache_free_ptr] = idx;
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nkeynes@103 | 137 | idx = entry->next;
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nkeynes@103 | 138 | entry->next = EMPTY_ENTRY;
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nkeynes@103 | 139 | } while( idx != EMPTY_ENTRY );
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nkeynes@103 | 140 | texcache_page_lookup[texture_page] = EMPTY_ENTRY;
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nkeynes@103 | 141 | }
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nkeynes@103 | 142 |
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nkeynes@103 | 143 | /**
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nkeynes@103 | 144 | * Evict a single texture from the cache.
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nkeynes@103 | 145 | * @return the slot of the evicted texture.
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nkeynes@103 | 146 | */
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nkeynes@103 | 147 | static texcache_entry_index texcache_evict( void )
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nkeynes@103 | 148 | {
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nkeynes@103 | 149 | /* Full table scan - take over the entry with the lowest lru value */
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nkeynes@103 | 150 | texcache_entry_index slot = 0;
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nkeynes@103 | 151 | int lru_value = texcache_active_list[0].lru_count;
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nkeynes@103 | 152 | int i;
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nkeynes@103 | 153 | for( i=1; i<MAX_TEXTURES; i++ ) {
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nkeynes@103 | 154 | /* FIXME: account for rollover */
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nkeynes@103 | 155 | if( texcache_active_list[i].lru_count < lru_value ) {
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nkeynes@103 | 156 | slot = i;
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nkeynes@103 | 157 | lru_value = texcache_active_list[i].lru_count;
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nkeynes@103 | 158 | }
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nkeynes@103 | 159 | }
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nkeynes@103 | 160 |
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nkeynes@103 | 161 | /* Remove the selected slot from the lookup table */
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nkeynes@103 | 162 | uint32_t evict_page = texcache_active_list[slot].texture_addr;
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nkeynes@103 | 163 | texcache_entry_index replace_next = texcache_active_list[slot].next;
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nkeynes@103 | 164 | texcache_active_list[slot].next = EMPTY_ENTRY; /* Just for safety */
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nkeynes@103 | 165 | if( texcache_page_lookup[evict_page] == slot ) {
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nkeynes@103 | 166 | texcache_page_lookup[evict_page] = replace_next;
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nkeynes@103 | 167 | } else {
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nkeynes@103 | 168 | texcache_entry_index idx = texcache_page_lookup[evict_page];
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nkeynes@103 | 169 | texcache_entry_index next;
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nkeynes@103 | 170 | do {
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nkeynes@103 | 171 | next = texcache_active_list[idx].next;
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nkeynes@103 | 172 | if( next == slot ) {
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nkeynes@103 | 173 | texcache_active_list[idx].next = replace_next;
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nkeynes@103 | 174 | break;
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nkeynes@103 | 175 | }
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nkeynes@103 | 176 | idx = next;
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nkeynes@103 | 177 | } while( next != EMPTY_ENTRY );
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nkeynes@103 | 178 | }
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nkeynes@103 | 179 | return slot;
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nkeynes@103 | 180 | }
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nkeynes@103 | 181 |
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nkeynes@129 | 182 | static void detwiddle_pal8_to_32(int x1, int y1, int size, int totsize,
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nkeynes@113 | 183 | char **in, uint32_t *out, uint32_t *pal) {
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nkeynes@113 | 184 | if (size == 1) {
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nkeynes@113 | 185 | out[y1 * totsize + x1] = pal[**in];
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nkeynes@113 | 186 | (*in)++;
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nkeynes@113 | 187 | } else {
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nkeynes@113 | 188 | int ns = size>>1;
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nkeynes@129 | 189 | detwiddle_pal8_to_32(x1, y1, ns, totsize, in, out, pal);
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nkeynes@129 | 190 | detwiddle_pal8_to_32(x1, y1+ns, ns, totsize, in, out, pal);
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nkeynes@129 | 191 | detwiddle_pal8_to_32(x1+ns, y1, ns, totsize, in, out, pal);
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nkeynes@129 | 192 | detwiddle_pal8_to_32(x1+ns, y1+ns, ns, totsize, in, out, pal);
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nkeynes@129 | 193 | }
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nkeynes@129 | 194 | }
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nkeynes@129 | 195 |
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nkeynes@129 | 196 | static void detwiddle_pal8_to_16(int x1, int y1, int size, int totsize,
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nkeynes@129 | 197 | char **in, uint16_t *out, uint16_t *pal) {
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nkeynes@129 | 198 | if (size == 1) {
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nkeynes@129 | 199 | out[y1 * totsize + x1] = pal[**in];
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nkeynes@129 | 200 | (*in)++;
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nkeynes@129 | 201 | } else {
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nkeynes@129 | 202 | int ns = size>>1;
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nkeynes@129 | 203 | detwiddle_pal8_to_16(x1, y1, ns, totsize, in, out, pal);
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nkeynes@129 | 204 | detwiddle_pal8_to_16(x1, y1+ns, ns, totsize, in, out, pal);
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nkeynes@129 | 205 | detwiddle_pal8_to_16(x1+ns, y1, ns, totsize, in, out, pal);
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nkeynes@129 | 206 | detwiddle_pal8_to_16(x1+ns, y1+ns, ns, totsize, in, out, pal);
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nkeynes@113 | 207 | }
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nkeynes@113 | 208 | }
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nkeynes@113 | 209 |
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nkeynes@126 | 210 | static void detwiddle_16_to_16(int x1, int y1, int size, int totsize,
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nkeynes@126 | 211 | uint16_t **in, uint16_t *out ) {
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nkeynes@126 | 212 | if (size == 1) {
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nkeynes@126 | 213 | out[y1 * totsize + x1] = **in;
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nkeynes@126 | 214 | (*in)++;
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nkeynes@126 | 215 | } else {
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nkeynes@126 | 216 | int ns = size>>1;
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nkeynes@126 | 217 | detwiddle_16_to_16(x1, y1, ns, totsize, in, out);
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nkeynes@126 | 218 | detwiddle_16_to_16(x1, y1+ns, ns, totsize, in, out);
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nkeynes@126 | 219 | detwiddle_16_to_16(x1+ns, y1, ns, totsize, in, out);
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nkeynes@126 | 220 | detwiddle_16_to_16(x1+ns, y1+ns, ns, totsize, in, out);
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nkeynes@126 | 221 | }
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nkeynes@126 | 222 | }
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nkeynes@126 | 223 |
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nkeynes@224 | 224 | #define VQ_CODEBOOK_SIZE 2048 /* 256 entries * 4 pixels per quad * 2 byte pixels */
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nkeynes@224 | 225 |
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nkeynes@224 | 226 | struct vq_codebook {
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nkeynes@224 | 227 | uint16_t quad[256][4];
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nkeynes@224 | 228 | };
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nkeynes@224 | 229 |
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nkeynes@224 | 230 | static void detwiddle_vq_to_16(int x1, int y1, int size, int totsize,
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nkeynes@224 | 231 | uint8_t **in, uint16_t *out, struct vq_codebook *codebook ) {
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nkeynes@224 | 232 | if( size == 2 ) {
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nkeynes@224 | 233 | uint8_t code = **in;
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nkeynes@224 | 234 | (*in)++;
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nkeynes@224 | 235 | out[y1 * totsize + x1] = codebook->quad[code][0];
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nkeynes@224 | 236 | out[y1 * totsize + x1 + 1] = codebook->quad[code][1];
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nkeynes@224 | 237 | out[(y1+1) * totsize + x1] = codebook->quad[code][2];
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nkeynes@224 | 238 | out[(y1+1) * totsize + x1 + 1] = codebook->quad[code][3];
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nkeynes@224 | 239 | } else {
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nkeynes@224 | 240 | int ns = size>>1;
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nkeynes@224 | 241 | detwiddle_vq_to_16(x1, y1, ns, totsize, in, out, codebook);
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nkeynes@224 | 242 | detwiddle_vq_to_16(x1, y1+ns, ns, totsize, in, out, codebook);
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nkeynes@224 | 243 | detwiddle_vq_to_16(x1+ns, y1, ns, totsize, in, out, codebook);
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nkeynes@224 | 244 | detwiddle_vq_to_16(x1+ns, y1+ns, ns, totsize, in, out, codebook);
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nkeynes@224 | 245 | }
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nkeynes@224 | 246 | }
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nkeynes@224 | 247 |
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nkeynes@224 | 248 | static void vq_decode( int width, int height, char *input, uint16_t *output,
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nkeynes@224 | 249 | int twiddled ) {
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nkeynes@224 | 250 | struct vq_codebook codebook;
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nkeynes@224 | 251 | int i,j;
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nkeynes@224 | 252 |
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nkeynes@224 | 253 | /* Detwiddle the codebook, for the sake of my own sanity if nothing else */
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nkeynes@224 | 254 | uint16_t *p = (uint16_t *)input;
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nkeynes@224 | 255 | for( i=0; i<256; i++ ) {
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nkeynes@224 | 256 | codebook.quad[i][0] = *p++;
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nkeynes@224 | 257 | codebook.quad[i][2] = *p++;
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nkeynes@224 | 258 | codebook.quad[i][1] = *p++;
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nkeynes@224 | 259 | codebook.quad[i][3] = *p++;
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nkeynes@224 | 260 | }
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nkeynes@224 | 261 |
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nkeynes@224 | 262 | uint8_t *c = (uint8_t *)p;
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nkeynes@224 | 263 | if( twiddled ) {
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nkeynes@224 | 264 | detwiddle_vq_to_16( 0, 0, width, width, &c, output, &codebook );
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nkeynes@224 | 265 | } else {
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nkeynes@224 | 266 | for( j=0; j<height; j+=2 ) {
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nkeynes@224 | 267 | for( i=0; i<width; i+=2 ) {
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nkeynes@224 | 268 | uint8_t code = *c;
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nkeynes@224 | 269 | output[i + j*width] = codebook.quad[code][0];
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nkeynes@224 | 270 | output[i + 1 + j*width] = codebook.quad[code][1];
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nkeynes@224 | 271 | output[i + (j+1)*width] = codebook.quad[code][2];
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nkeynes@224 | 272 | output[i + 1 + (j+1)*width] = codebook.quad[code][3];
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nkeynes@224 | 273 | }
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nkeynes@224 | 274 | }
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nkeynes@224 | 275 | }
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nkeynes@224 | 276 | }
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nkeynes@113 | 277 |
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nkeynes@103 | 278 | /**
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nkeynes@103 | 279 | * Load texture data from the given address and parameters into the currently
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nkeynes@103 | 280 | * bound OpenGL texture.
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nkeynes@103 | 281 | */
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nkeynes@103 | 282 | static texcache_load_texture( uint32_t texture_addr, int width, int height,
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nkeynes@103 | 283 | int mode ) {
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nkeynes@103 | 284 | uint32_t bytes = width * height;
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nkeynes@108 | 285 | int shift = 1;
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nkeynes@103 | 286 | GLint intFormat, format, type;
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nkeynes@108 | 287 | int tex_format = mode & PVR2_TEX_FORMAT_MASK;
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nkeynes@108 | 288 |
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nkeynes@108 | 289 | if( tex_format == PVR2_TEX_FORMAT_IDX8 ||
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nkeynes@108 | 290 | tex_format == PVR2_TEX_FORMAT_IDX4 ) {
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nkeynes@191 | 291 | switch( MMIO_READ( PVR2, RENDER_PALETTE ) & 0x03 ) {
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nkeynes@108 | 292 | case 0: /* ARGB1555 */
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nkeynes@108 | 293 | intFormat = GL_RGB5_A1;
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nkeynes@108 | 294 | format = GL_RGBA;
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nkeynes@129 | 295 | type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
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nkeynes@108 | 296 | break;
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nkeynes@108 | 297 | case 1:
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nkeynes@108 | 298 | intFormat = GL_RGB;
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nkeynes@108 | 299 | format = GL_RGB;
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nkeynes@129 | 300 | type = GL_UNSIGNED_SHORT_5_6_5_REV;
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nkeynes@108 | 301 | break;
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nkeynes@108 | 302 | case 2:
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nkeynes@108 | 303 | intFormat = GL_RGBA4;
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nkeynes@129 | 304 | format = GL_BGRA;
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nkeynes@129 | 305 | type = GL_UNSIGNED_SHORT_4_4_4_4_REV;
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nkeynes@108 | 306 | break;
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nkeynes@108 | 307 | case 3:
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nkeynes@108 | 308 | intFormat = GL_RGBA8;
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nkeynes@113 | 309 | format = GL_BGRA;
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nkeynes@113 | 310 | type = GL_UNSIGNED_INT_8_8_8_8_REV;
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nkeynes@108 | 311 | shift = 2;
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nkeynes@108 | 312 | break;
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nkeynes@108 | 313 | }
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nkeynes@108 | 314 |
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nkeynes@108 | 315 | if( tex_format == PVR2_TEX_FORMAT_IDX8 ) {
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nkeynes@113 | 316 | unsigned char data[bytes<<shift];
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nkeynes@108 | 317 | int bank = (mode >> 25) &0x03;
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nkeynes@108 | 318 | char *palette = mmio_region_PVR2PAL.mem + (bank * (256 << shift));
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nkeynes@108 | 319 | int i;
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nkeynes@113 | 320 | if( shift == 2 ) {
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nkeynes@113 | 321 | char tmp[bytes];
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nkeynes@113 | 322 | char *p = tmp;
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nkeynes@113 | 323 | pvr2_vram64_read( tmp, texture_addr, bytes );
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nkeynes@129 | 324 | detwiddle_pal8_to_32( 0, 0, width, width, &p,
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nkeynes@113 | 325 | (uint32_t *)data, (uint32_t *)palette );
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nkeynes@113 | 326 | } else {
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nkeynes@129 | 327 | char tmp[bytes];
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nkeynes@129 | 328 | char *p = tmp;
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nkeynes@129 | 329 | pvr2_vram64_read( tmp, texture_addr, bytes );
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nkeynes@129 | 330 | detwiddle_pal8_to_16( 0, 0, width, width, &p,
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nkeynes@129 | 331 | (uint16_t *)data, (uint16_t *)palette );
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nkeynes@108 | 332 | }
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nkeynes@108 | 333 | glTexImage2D( GL_TEXTURE_2D, 0, intFormat, width, height, 0, format, type,
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nkeynes@108 | 334 | data );
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nkeynes@108 | 335 |
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nkeynes@108 | 336 | }
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nkeynes@108 | 337 | } else {
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nkeynes@108 | 338 | switch( tex_format ) {
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nkeynes@108 | 339 | case PVR2_TEX_FORMAT_ARGB1555:
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nkeynes@108 | 340 | bytes <<= 1;
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nkeynes@108 | 341 | intFormat = GL_RGB5_A1;
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nkeynes@108 | 342 | format = GL_RGBA;
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nkeynes@129 | 343 | type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
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nkeynes@108 | 344 | break;
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nkeynes@108 | 345 | case PVR2_TEX_FORMAT_RGB565:
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nkeynes@108 | 346 | bytes <<= 1;
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nkeynes@129 | 347 | intFormat = GL_RGB;
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nkeynes@129 | 348 | format = GL_RGB;
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nkeynes@129 | 349 | type = GL_UNSIGNED_SHORT_5_6_5_REV;
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nkeynes@108 | 350 | break;
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nkeynes@108 | 351 | case PVR2_TEX_FORMAT_ARGB4444:
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nkeynes@108 | 352 | bytes <<= 1;
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nkeynes@108 | 353 | intFormat = GL_RGBA4;
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nkeynes@126 | 354 | format = GL_BGRA;
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nkeynes@126 | 355 | type = GL_UNSIGNED_SHORT_4_4_4_4_REV;
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nkeynes@108 | 356 | break;
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nkeynes@108 | 357 | case PVR2_TEX_FORMAT_YUV422:
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nkeynes@108 | 358 | ERROR( "YUV textures not supported" );
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nkeynes@108 | 359 | break;
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nkeynes@108 | 360 | case PVR2_TEX_FORMAT_BUMPMAP:
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nkeynes@108 | 361 | ERROR( "Bumpmap not supported" );
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nkeynes@108 | 362 | break;
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nkeynes@108 | 363 | case PVR2_TEX_FORMAT_IDX4:
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nkeynes@108 | 364 | /* Supported? */
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nkeynes@108 | 365 | bytes >>= 1;
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nkeynes@108 | 366 | intFormat = GL_INTENSITY4;
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nkeynes@108 | 367 | format = GL_COLOR_INDEX;
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nkeynes@108 | 368 | type = GL_UNSIGNED_BYTE;
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nkeynes@108 | 369 | shift = 0;
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nkeynes@108 | 370 | break;
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nkeynes@108 | 371 | case PVR2_TEX_FORMAT_IDX8:
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nkeynes@108 | 372 | intFormat = GL_INTENSITY8;
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nkeynes@108 | 373 | format = GL_COLOR_INDEX;
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nkeynes@108 | 374 | type = GL_UNSIGNED_BYTE;
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nkeynes@108 | 375 | shift = 0;
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nkeynes@108 | 376 | break;
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nkeynes@108 | 377 | }
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nkeynes@108 | 378 |
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nkeynes@129 | 379 | char data[bytes];
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nkeynes@108 | 380 | /* load data from image, detwiddling/uncompressing as required */
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nkeynes@108 | 381 | if( PVR2_TEX_IS_COMPRESSED(mode) ) {
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nkeynes@224 | 382 | int inputlength = VQ_CODEBOOK_SIZE +
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nkeynes@224 | 383 | ((width*height) >> 2); /* + mip maps */
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nkeynes@224 | 384 | char tmp[bytes];
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nkeynes@224 | 385 | pvr2_vram64_read( tmp, texture_addr, inputlength );
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nkeynes@224 | 386 | vq_decode( width, height, tmp, (uint16_t *)&data, PVR2_TEX_IS_TWIDDLED(mode) );
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nkeynes@224 | 387 | } else if( PVR2_TEX_IS_TWIDDLED(mode) ) {
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nkeynes@224 | 388 | char tmp[bytes];
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nkeynes@224 | 389 | uint16_t *p = (uint16_t *)tmp;
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nkeynes@224 | 390 | pvr2_vram64_read( tmp, texture_addr, bytes );
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nkeynes@224 | 391 | /* Untwiddle */
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nkeynes@224 | 392 | detwiddle_16_to_16( 0, 0, width, width, &p, (uint16_t *)&data );
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nkeynes@108 | 393 | } else {
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nkeynes@224 | 394 | pvr2_vram64_read( data, texture_addr, bytes );
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nkeynes@108 | 395 | }
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nkeynes@108 | 396 |
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nkeynes@108 | 397 | /* Pass to GL */
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nkeynes@108 | 398 | glTexImage2D( GL_TEXTURE_2D, 0, intFormat, width, height, 0, format, type,
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nkeynes@108 | 399 | data );
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nkeynes@103 | 400 | }
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nkeynes@108 | 401 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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nkeynes@108 | 402 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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nkeynes@103 | 403 | }
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nkeynes@103 | 404 |
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nkeynes@103 | 405 | /**
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nkeynes@103 | 406 | * Return a texture ID for the texture specified at the supplied address
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nkeynes@103 | 407 | * and given parameters (the same sequence of bytes could in theory have
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nkeynes@103 | 408 | * multiple interpretations). We use the texture address as the primary
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nkeynes@103 | 409 | * index, but allow for multiple instances at each address. The texture
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nkeynes@103 | 410 | * will be bound to the GL_TEXTURE_2D target before being returned.
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nkeynes@103 | 411 | *
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nkeynes@103 | 412 | * If the texture has already been bound, return the ID to which it was
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nkeynes@103 | 413 | * bound. Otherwise obtain an unused texture ID and set it up appropriately.
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nkeynes@103 | 414 | */
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nkeynes@103 | 415 | GLuint texcache_get_texture( uint32_t texture_addr, int width, int height,
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nkeynes@103 | 416 | int mode )
|
nkeynes@103 | 417 | {
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nkeynes@103 | 418 | uint32_t texture_page = texture_addr >> 12;
|
nkeynes@103 | 419 | texcache_entry_index idx = texcache_page_lookup[texture_page];
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nkeynes@103 | 420 | while( idx != EMPTY_ENTRY ) {
|
nkeynes@103 | 421 | texcache_entry_t entry = &texcache_active_list[idx];
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nkeynes@103 | 422 | if( entry->texture_addr == texture_addr &&
|
nkeynes@103 | 423 | entry->mode == mode &&
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nkeynes@103 | 424 | entry->width == width &&
|
nkeynes@103 | 425 | entry->height == height ) {
|
nkeynes@103 | 426 | entry->lru_count = texcache_ref_counter++;
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nkeynes@103 | 427 | glBindTexture( GL_TEXTURE_2D, entry->texture_id );
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nkeynes@103 | 428 | return entry->texture_id;
|
nkeynes@103 | 429 | }
|
nkeynes@103 | 430 | idx = entry->next;
|
nkeynes@103 | 431 | }
|
nkeynes@103 | 432 |
|
nkeynes@103 | 433 | /* Not found - check the free list */
|
nkeynes@103 | 434 | int slot = 0;
|
nkeynes@103 | 435 |
|
nkeynes@103 | 436 | if( texcache_free_ptr < MAX_TEXTURES ) {
|
nkeynes@103 | 437 | slot = texcache_free_list[texcache_free_ptr++];
|
nkeynes@103 | 438 | } else {
|
nkeynes@103 | 439 | slot = texcache_evict();
|
nkeynes@103 | 440 | }
|
nkeynes@103 | 441 |
|
nkeynes@103 | 442 | /* Construct new entry */
|
nkeynes@103 | 443 | texcache_active_list[slot].texture_addr = texture_addr;
|
nkeynes@103 | 444 | texcache_active_list[slot].width = width;
|
nkeynes@103 | 445 | texcache_active_list[slot].height = height;
|
nkeynes@103 | 446 | texcache_active_list[slot].mode = mode;
|
nkeynes@103 | 447 | texcache_active_list[slot].lru_count = texcache_ref_counter++;
|
nkeynes@103 | 448 |
|
nkeynes@103 | 449 | /* Add entry to the lookup table */
|
nkeynes@103 | 450 | texcache_active_list[slot].next = texcache_page_lookup[texture_page];
|
nkeynes@103 | 451 | texcache_page_lookup[texture_page] = slot;
|
nkeynes@103 | 452 |
|
nkeynes@103 | 453 | /* Construct the GL texture */
|
nkeynes@108 | 454 | glBindTexture( GL_TEXTURE_2D, texcache_active_list[slot].texture_id );
|
nkeynes@103 | 455 | texcache_load_texture( texture_addr, width, height, mode );
|
nkeynes@103 | 456 |
|
nkeynes@103 | 457 | return texcache_active_list[slot].texture_id;
|
nkeynes@103 | 458 | }
|