nkeynes@103 | 1 | /**
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nkeynes@287 | 2 | * $Id: texcache.c,v 1.12 2007-01-15 10:37:02 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@270 | 162 | uint32_t evict_page = texcache_active_list[slot].texture_addr >> 12;
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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@270 | 248 | static void vq_get_codebook( struct vq_codebook *codebook,
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nkeynes@270 | 249 | uint16_t *input )
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nkeynes@270 | 250 | {
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nkeynes@270 | 251 | /* Detwiddle the codebook, for the sake of my own sanity if nothing else */
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nkeynes@270 | 252 | uint16_t *p = (uint16_t *)input;
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nkeynes@270 | 253 | int i;
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nkeynes@270 | 254 | for( i=0; i<256; i++ ) {
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nkeynes@270 | 255 | codebook->quad[i][0] = *p++;
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nkeynes@270 | 256 | codebook->quad[i][2] = *p++;
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nkeynes@270 | 257 | codebook->quad[i][1] = *p++;
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nkeynes@270 | 258 | codebook->quad[i][3] = *p++;
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nkeynes@270 | 259 | }
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nkeynes@270 | 260 | }
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nkeynes@270 | 261 |
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nkeynes@270 | 262 |
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nkeynes@224 | 263 | static void vq_decode( int width, int height, char *input, uint16_t *output,
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nkeynes@270 | 264 | struct vq_codebook *codebook, int twiddled ) {
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nkeynes@224 | 265 | int i,j;
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nkeynes@224 | 266 |
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nkeynes@270 | 267 | uint8_t *c = (uint8_t *)input;
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nkeynes@224 | 268 | if( twiddled ) {
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nkeynes@270 | 269 | detwiddle_vq_to_16( 0, 0, width, width, &c, output, codebook );
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nkeynes@224 | 270 | } else {
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nkeynes@224 | 271 | for( j=0; j<height; j+=2 ) {
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nkeynes@224 | 272 | for( i=0; i<width; i+=2 ) {
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nkeynes@224 | 273 | uint8_t code = *c;
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nkeynes@270 | 274 | output[i + j*width] = codebook->quad[code][0];
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nkeynes@270 | 275 | output[i + 1 + j*width] = codebook->quad[code][1];
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nkeynes@270 | 276 | output[i + (j+1)*width] = codebook->quad[code][2];
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nkeynes@270 | 277 | output[i + 1 + (j+1)*width] = codebook->quad[code][3];
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nkeynes@224 | 278 | }
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nkeynes@224 | 279 | }
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nkeynes@224 | 280 | }
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nkeynes@224 | 281 | }
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nkeynes@113 | 282 |
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nkeynes@282 | 283 | static inline uint32_t yuv_to_rgb32( float y, float u, float v )
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nkeynes@282 | 284 | {
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nkeynes@282 | 285 | u -= 128;
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nkeynes@282 | 286 | v -= 128;
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nkeynes@282 | 287 | int r = (int)(y + v*1.375);
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nkeynes@282 | 288 | int g = (int)(y - u*0.34375 - v*0.6875);
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nkeynes@282 | 289 | int b = (int)(y + u*1.71875);
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nkeynes@282 | 290 | if( r > 255 ) { r = 255; } else if( r < 0 ) { r = 0; }
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nkeynes@282 | 291 | if( g > 255 ) { g = 255; } else if( g < 0 ) { g = 0; }
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nkeynes@282 | 292 | if( b > 255 ) { b = 255; } else if( b < 0 ) { b = 0; }
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nkeynes@282 | 293 | return 0xFF000000 | (r<<24) | (g<<16) | (b<<16);
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nkeynes@282 | 294 | }
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nkeynes@282 | 295 |
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nkeynes@282 | 296 |
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nkeynes@282 | 297 | /**
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nkeynes@282 | 298 | * Convert non-twiddled YUV texture data into RGB32 data - most GL implementations don't
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nkeynes@282 | 299 | * directly support this format unfortunately. The input data is formatted as
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nkeynes@282 | 300 | * 32 bits = 2 horizontal pixels, UYVY. This is currently done rather inefficiently
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nkeynes@282 | 301 | * in floating point.
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nkeynes@282 | 302 | */
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nkeynes@282 | 303 | static void yuv_decode( int width, int height, uint32_t *input, uint32_t *output )
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nkeynes@282 | 304 | {
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nkeynes@282 | 305 | int x, y;
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nkeynes@282 | 306 | uint32_t *p = input;
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nkeynes@282 | 307 | for( y=0; y<height; y++ ) {
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nkeynes@282 | 308 | for( x=0; x<width; x+=2 ) {
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nkeynes@282 | 309 | float u = (float)(*p & 0xFF);
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nkeynes@282 | 310 | float y0 = (float)( (*p>>8)&0xFF );
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nkeynes@282 | 311 | float v = (float)( (*p>>16)&0xFF );
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nkeynes@282 | 312 | float y1 = (float)( (*p>>24)&0xFF );
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nkeynes@282 | 313 | *output++ = yuv_to_rgb32( y0, u, v );
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nkeynes@282 | 314 | *output++ = yuv_to_rgb32( y1, u, v );
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nkeynes@287 | 315 | p++;
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nkeynes@282 | 316 | }
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nkeynes@282 | 317 | }
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nkeynes@282 | 318 | }
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nkeynes@282 | 319 |
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nkeynes@103 | 320 | /**
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nkeynes@103 | 321 | * Load texture data from the given address and parameters into the currently
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nkeynes@103 | 322 | * bound OpenGL texture.
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nkeynes@103 | 323 | */
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nkeynes@103 | 324 | static texcache_load_texture( uint32_t texture_addr, int width, int height,
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nkeynes@103 | 325 | int mode ) {
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nkeynes@284 | 326 | int bpp_shift = 1; /* bytes per (output) pixel as a power of 2 */
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nkeynes@103 | 327 | GLint intFormat, format, type;
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nkeynes@108 | 328 | int tex_format = mode & PVR2_TEX_FORMAT_MASK;
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nkeynes@270 | 329 | struct vq_codebook codebook;
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nkeynes@270 | 330 | GLint filter = GL_LINEAR;
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nkeynes@108 | 331 |
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nkeynes@270 | 332 | /* Decode the format parameters */
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nkeynes@270 | 333 | switch( tex_format ) {
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nkeynes@270 | 334 | case PVR2_TEX_FORMAT_IDX4:
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nkeynes@270 | 335 | ERROR( "4-bit indexed textures not supported" );
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nkeynes@270 | 336 | case PVR2_TEX_FORMAT_IDX8:
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nkeynes@284 | 337 | /* For indexed-colour modes, we need to lookup the palette control
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nkeynes@284 | 338 | * word to determine the de-indexed texture format.
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nkeynes@284 | 339 | */
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nkeynes@191 | 340 | switch( MMIO_READ( PVR2, RENDER_PALETTE ) & 0x03 ) {
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nkeynes@108 | 341 | case 0: /* ARGB1555 */
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nkeynes@108 | 342 | intFormat = GL_RGB5_A1;
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nkeynes@108 | 343 | format = GL_RGBA;
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nkeynes@129 | 344 | type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
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nkeynes@108 | 345 | break;
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nkeynes@284 | 346 | case 1: /* RGB565 */
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nkeynes@108 | 347 | intFormat = GL_RGB;
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nkeynes@108 | 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@284 | 351 | case 2: /* ARGB4444 */
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nkeynes@108 | 352 | intFormat = GL_RGBA4;
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nkeynes@129 | 353 | format = GL_BGRA;
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nkeynes@129 | 354 | type = GL_UNSIGNED_SHORT_4_4_4_4_REV;
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nkeynes@108 | 355 | break;
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nkeynes@284 | 356 | case 3: /* ARGB8888 */
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nkeynes@108 | 357 | intFormat = GL_RGBA8;
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nkeynes@113 | 358 | format = GL_BGRA;
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nkeynes@113 | 359 | type = GL_UNSIGNED_INT_8_8_8_8_REV;
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nkeynes@284 | 360 | bpp_shift = 2;
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nkeynes@108 | 361 | break;
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nkeynes@108 | 362 | }
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nkeynes@270 | 363 | break;
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nkeynes@270 | 364 |
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nkeynes@270 | 365 | case PVR2_TEX_FORMAT_ARGB1555:
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nkeynes@270 | 366 | intFormat = GL_RGB5_A1;
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nkeynes@270 | 367 | format = GL_RGBA;
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nkeynes@270 | 368 | type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
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nkeynes@270 | 369 | break;
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nkeynes@270 | 370 | case PVR2_TEX_FORMAT_RGB565:
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nkeynes@270 | 371 | intFormat = GL_RGB;
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nkeynes@270 | 372 | format = GL_RGB;
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nkeynes@270 | 373 | type = GL_UNSIGNED_SHORT_5_6_5_REV;
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nkeynes@270 | 374 | break;
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nkeynes@270 | 375 | case PVR2_TEX_FORMAT_ARGB4444:
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nkeynes@270 | 376 | intFormat = GL_RGBA4;
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nkeynes@270 | 377 | format = GL_BGRA;
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nkeynes@270 | 378 | type = GL_UNSIGNED_SHORT_4_4_4_4_REV;
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nkeynes@270 | 379 | break;
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nkeynes@270 | 380 | case PVR2_TEX_FORMAT_YUV422:
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nkeynes@284 | 381 | /* YUV422 isn't directly supported by most implementations, so decode
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nkeynes@284 | 382 | * it to a (reasonably) standard ARGB32.
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nkeynes@284 | 383 | */
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nkeynes@284 | 384 | bpp_shift = 2;
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nkeynes@282 | 385 | intFormat = GL_RGBA8;
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nkeynes@282 | 386 | format = GL_BGRA;
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nkeynes@282 | 387 | type = GL_UNSIGNED_INT_8_8_8_8_REV;
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nkeynes@270 | 388 | break;
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nkeynes@270 | 389 | case PVR2_TEX_FORMAT_BUMPMAP:
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nkeynes@270 | 390 | ERROR( "Bumpmap not supported" );
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nkeynes@270 | 391 | break;
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nkeynes@270 | 392 | }
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nkeynes@270 | 393 |
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nkeynes@284 | 394 | if( PVR2_TEX_IS_STRIDE(mode) ) {
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nkeynes@284 | 395 | /* Stride textures cannot be mip-mapped, compressed, indexed or twiddled */
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nkeynes@284 | 396 | uint32_t stride = (MMIO_READ( PVR2, RENDER_TEXSIZE ) & 0x003F) << 5;
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nkeynes@284 | 397 | char data[(width*height) << bpp_shift];
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nkeynes@284 | 398 | if( tex_format == PVR2_TEX_FORMAT_YUV422 ) {
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nkeynes@284 | 399 | char tmp[(width*height)<<1];
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nkeynes@284 | 400 | pvr2_vram64_read_stride( &tmp, width<<1, texture_addr, stride<<1, height );
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nkeynes@284 | 401 | yuv_decode(width, height, &tmp, &data );
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nkeynes@284 | 402 | } else {
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nkeynes@284 | 403 | pvr2_vram64_read_stride( &data, width<<bpp_shift, texture_addr, stride<<bpp_shift, height );
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nkeynes@284 | 404 | }
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nkeynes@284 | 405 | glTexImage2D( GL_TEXTURE_2D, 0, intFormat, width, height, 0, format, type, data );
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nkeynes@284 | 406 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
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nkeynes@284 | 407 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
nkeynes@284 | 408 | return;
|
nkeynes@284 | 409 | }
|
nkeynes@284 | 410 |
|
nkeynes@284 | 411 | int level=0, last_level = 0, mip_width = width, mip_height = height, mip_bytes;
|
nkeynes@270 | 412 | if( PVR2_TEX_IS_MIPMAPPED(mode) ) {
|
nkeynes@270 | 413 | int i;
|
nkeynes@270 | 414 | for( i=0; 1<<(i+1) < width; i++ );
|
nkeynes@270 | 415 | last_level = i;
|
nkeynes@270 | 416 | mip_width = width >> i;
|
nkeynes@270 | 417 | mip_height= height >> i;
|
nkeynes@270 | 418 | filter = GL_LINEAR_MIPMAP_LINEAR;
|
nkeynes@270 | 419 | }
|
nkeynes@284 | 420 | mip_bytes = (mip_width * mip_width) << bpp_shift;
|
nkeynes@108 | 421 |
|
nkeynes@270 | 422 | if( PVR2_TEX_IS_COMPRESSED(mode) ) {
|
nkeynes@270 | 423 | uint16_t tmp[VQ_CODEBOOK_SIZE];
|
nkeynes@270 | 424 | pvr2_vram64_read( (char *)tmp, texture_addr, VQ_CODEBOOK_SIZE );
|
nkeynes@270 | 425 | texture_addr += VQ_CODEBOOK_SIZE;
|
nkeynes@270 | 426 | vq_get_codebook( &codebook, tmp );
|
nkeynes@270 | 427 | }
|
nkeynes@270 | 428 |
|
nkeynes@270 | 429 | for( level=last_level; level>= 0; level-- ) {
|
nkeynes@270 | 430 | char data[mip_bytes];
|
nkeynes@270 | 431 | /* load data from image, detwiddling/uncompressing as required */
|
nkeynes@108 | 432 | if( tex_format == PVR2_TEX_FORMAT_IDX8 ) {
|
nkeynes@284 | 433 | int inputlength = mip_bytes >> bpp_shift;
|
nkeynes@108 | 434 | int bank = (mode >> 25) &0x03;
|
nkeynes@284 | 435 | char *palette = mmio_region_PVR2PAL.mem + (bank * (256 << bpp_shift));
|
nkeynes@270 | 436 | char tmp[inputlength];
|
nkeynes@270 | 437 | char *p = tmp;
|
nkeynes@270 | 438 | pvr2_vram64_read( tmp, texture_addr, inputlength );
|
nkeynes@284 | 439 | if( bpp_shift == 2 ) {
|
nkeynes@270 | 440 | detwiddle_pal8_to_32( 0, 0, mip_width, mip_width, &p,
|
nkeynes@113 | 441 | (uint32_t *)data, (uint32_t *)palette );
|
nkeynes@113 | 442 | } else {
|
nkeynes@270 | 443 | detwiddle_pal8_to_16( 0, 0, mip_width, mip_width, &p,
|
nkeynes@129 | 444 | (uint16_t *)data, (uint16_t *)palette );
|
nkeynes@108 | 445 | }
|
nkeynes@282 | 446 | } else if( tex_format == PVR2_TEX_FORMAT_YUV422 ) {
|
nkeynes@282 | 447 | int inputlength = ((mip_width*mip_height)<<1);
|
nkeynes@282 | 448 | char tmp[inputlength];
|
nkeynes@282 | 449 | pvr2_vram64_read( tmp, texture_addr, inputlength );
|
nkeynes@282 | 450 | yuv_decode( mip_width, mip_height, tmp, (uint32_t *)&data );
|
nkeynes@270 | 451 | } else if( PVR2_TEX_IS_COMPRESSED(mode) ) {
|
nkeynes@270 | 452 | int inputlength = ((mip_width*mip_height) >> 2);
|
nkeynes@270 | 453 | char tmp[inputlength];
|
nkeynes@270 | 454 | pvr2_vram64_read( tmp, texture_addr, inputlength );
|
nkeynes@270 | 455 | vq_decode( mip_width, mip_height, tmp, (uint16_t *)&data, &codebook,
|
nkeynes@270 | 456 | PVR2_TEX_IS_TWIDDLED(mode) );
|
nkeynes@270 | 457 | } else if( PVR2_TEX_IS_TWIDDLED(mode) ) {
|
nkeynes@270 | 458 | char tmp[mip_bytes];
|
nkeynes@270 | 459 | uint16_t *p = (uint16_t *)tmp;
|
nkeynes@270 | 460 | pvr2_vram64_read( tmp, texture_addr, mip_bytes );
|
nkeynes@270 | 461 | /* Untwiddle */
|
nkeynes@270 | 462 | detwiddle_16_to_16( 0, 0, mip_width, mip_width, &p, (uint16_t *)&data );
|
nkeynes@270 | 463 | } else {
|
nkeynes@270 | 464 | pvr2_vram64_read( data, texture_addr, mip_bytes );
|
nkeynes@108 | 465 | }
|
nkeynes@270 | 466 |
|
nkeynes@270 | 467 | if( PVR2_TEX_IS_MIPMAPPED(mode) && mip_width == 2 ) {
|
nkeynes@270 | 468 | /* Opengl requires a 1x1 texture, but the PVR2 doesn't. This should
|
nkeynes@270 | 469 | * strictly speaking be the average of the 2x2 texture, but we're
|
nkeynes@270 | 470 | * lazy at the moment */
|
nkeynes@270 | 471 | glTexImage2D( GL_TEXTURE_2D, level+1, intFormat, 1, 1, 0, format, type, data );
|
nkeynes@108 | 472 | }
|
nkeynes@108 | 473 |
|
nkeynes@108 | 474 | /* Pass to GL */
|
nkeynes@270 | 475 | glTexImage2D( GL_TEXTURE_2D, level, intFormat, mip_width, mip_height, 0, format, type,
|
nkeynes@108 | 476 | data );
|
nkeynes@270 | 477 | texture_addr += mip_bytes;
|
nkeynes@270 | 478 | mip_width <<= 1;
|
nkeynes@270 | 479 | mip_height <<= 1;
|
nkeynes@270 | 480 | mip_bytes <<= 2;
|
nkeynes@103 | 481 | }
|
nkeynes@270 | 482 |
|
nkeynes@270 | 483 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
|
nkeynes@108 | 484 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
nkeynes@103 | 485 | }
|
nkeynes@103 | 486 |
|
nkeynes@103 | 487 | /**
|
nkeynes@103 | 488 | * Return a texture ID for the texture specified at the supplied address
|
nkeynes@103 | 489 | * and given parameters (the same sequence of bytes could in theory have
|
nkeynes@103 | 490 | * multiple interpretations). We use the texture address as the primary
|
nkeynes@103 | 491 | * index, but allow for multiple instances at each address. The texture
|
nkeynes@103 | 492 | * will be bound to the GL_TEXTURE_2D target before being returned.
|
nkeynes@103 | 493 | *
|
nkeynes@103 | 494 | * If the texture has already been bound, return the ID to which it was
|
nkeynes@103 | 495 | * bound. Otherwise obtain an unused texture ID and set it up appropriately.
|
nkeynes@103 | 496 | */
|
nkeynes@103 | 497 | GLuint texcache_get_texture( uint32_t texture_addr, int width, int height,
|
nkeynes@103 | 498 | int mode )
|
nkeynes@103 | 499 | {
|
nkeynes@103 | 500 | uint32_t texture_page = texture_addr >> 12;
|
nkeynes@103 | 501 | texcache_entry_index idx = texcache_page_lookup[texture_page];
|
nkeynes@103 | 502 | while( idx != EMPTY_ENTRY ) {
|
nkeynes@103 | 503 | texcache_entry_t entry = &texcache_active_list[idx];
|
nkeynes@103 | 504 | if( entry->texture_addr == texture_addr &&
|
nkeynes@103 | 505 | entry->mode == mode &&
|
nkeynes@103 | 506 | entry->width == width &&
|
nkeynes@103 | 507 | entry->height == height ) {
|
nkeynes@103 | 508 | entry->lru_count = texcache_ref_counter++;
|
nkeynes@103 | 509 | glBindTexture( GL_TEXTURE_2D, entry->texture_id );
|
nkeynes@103 | 510 | return entry->texture_id;
|
nkeynes@103 | 511 | }
|
nkeynes@103 | 512 | idx = entry->next;
|
nkeynes@103 | 513 | }
|
nkeynes@103 | 514 |
|
nkeynes@103 | 515 | /* Not found - check the free list */
|
nkeynes@103 | 516 | int slot = 0;
|
nkeynes@103 | 517 |
|
nkeynes@103 | 518 | if( texcache_free_ptr < MAX_TEXTURES ) {
|
nkeynes@103 | 519 | slot = texcache_free_list[texcache_free_ptr++];
|
nkeynes@103 | 520 | } else {
|
nkeynes@103 | 521 | slot = texcache_evict();
|
nkeynes@103 | 522 | }
|
nkeynes@103 | 523 |
|
nkeynes@103 | 524 | /* Construct new entry */
|
nkeynes@103 | 525 | texcache_active_list[slot].texture_addr = texture_addr;
|
nkeynes@103 | 526 | texcache_active_list[slot].width = width;
|
nkeynes@103 | 527 | texcache_active_list[slot].height = height;
|
nkeynes@103 | 528 | texcache_active_list[slot].mode = mode;
|
nkeynes@103 | 529 | texcache_active_list[slot].lru_count = texcache_ref_counter++;
|
nkeynes@103 | 530 |
|
nkeynes@103 | 531 | /* Add entry to the lookup table */
|
nkeynes@103 | 532 | texcache_active_list[slot].next = texcache_page_lookup[texture_page];
|
nkeynes@103 | 533 | texcache_page_lookup[texture_page] = slot;
|
nkeynes@103 | 534 |
|
nkeynes@103 | 535 | /* Construct the GL texture */
|
nkeynes@108 | 536 | glBindTexture( GL_TEXTURE_2D, texcache_active_list[slot].texture_id );
|
nkeynes@103 | 537 | texcache_load_texture( texture_addr, width, height, mode );
|
nkeynes@103 | 538 |
|
nkeynes@103 | 539 | return texcache_active_list[slot].texture_id;
|
nkeynes@103 | 540 | }
|