nkeynes@103 | 1 | /**
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nkeynes@321 | 2 | * $Id: texcache.c,v 1.20 2007-01-25 08:16:02 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@321 | 28 | #define MAX_TEXTURES 128
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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@311 | 182 | static void decode_pal8_to_32( uint32_t *out, uint8_t *in, int inbytes, uint32_t *pal )
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nkeynes@311 | 183 | {
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nkeynes@311 | 184 | int i;
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nkeynes@311 | 185 | for( i=0; i<inbytes; i++ ) {
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nkeynes@311 | 186 | *out++ = pal[*in++];
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nkeynes@129 | 187 | }
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nkeynes@129 | 188 | }
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nkeynes@129 | 189 |
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nkeynes@321 | 190 | static void decode_pal8_to_16( uint16_t *out, uint8_t *in, int inbytes, uint32_t *pal )
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nkeynes@311 | 191 | {
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nkeynes@311 | 192 | int i;
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nkeynes@311 | 193 | for( i=0; i<inbytes; i++ ) {
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nkeynes@321 | 194 | *out++ = (uint16_t)pal[*in++];
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nkeynes@113 | 195 | }
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nkeynes@113 | 196 | }
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nkeynes@113 | 197 |
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nkeynes@315 | 198 | static void decode_pal4_to_32( uint32_t *out, uint8_t *in, int inbytes, uint32_t *pal )
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nkeynes@315 | 199 | {
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nkeynes@315 | 200 | int i;
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nkeynes@315 | 201 | for( i=0; i<inbytes; i++ ) {
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nkeynes@315 | 202 | *out++ = pal[*in & 0x0F];
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nkeynes@315 | 203 | *out++ = pal[(*in >> 4)];
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nkeynes@315 | 204 | in++;
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nkeynes@315 | 205 | }
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nkeynes@315 | 206 | }
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nkeynes@315 | 207 |
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nkeynes@315 | 208 |
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nkeynes@321 | 209 | static void decode_pal4_to_16( uint16_t *out, uint8_t *in, int inbytes, uint32_t *pal )
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nkeynes@315 | 210 | {
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nkeynes@315 | 211 | int i;
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nkeynes@315 | 212 | for( i=0; i<inbytes; i++ ) {
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nkeynes@321 | 213 | *out++ = (uint16_t)pal[*in & 0x0F];
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nkeynes@321 | 214 | *out++ = (uint16_t)pal[(*in >> 4)];
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nkeynes@315 | 215 | in++;
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nkeynes@315 | 216 | }
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nkeynes@315 | 217 | }
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nkeynes@315 | 218 |
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nkeynes@224 | 219 | #define VQ_CODEBOOK_SIZE 2048 /* 256 entries * 4 pixels per quad * 2 byte pixels */
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nkeynes@224 | 220 |
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nkeynes@224 | 221 | struct vq_codebook {
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nkeynes@224 | 222 | uint16_t quad[256][4];
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nkeynes@224 | 223 | };
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nkeynes@224 | 224 |
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nkeynes@270 | 225 | static void vq_get_codebook( struct vq_codebook *codebook,
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nkeynes@270 | 226 | uint16_t *input )
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nkeynes@270 | 227 | {
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nkeynes@270 | 228 | /* Detwiddle the codebook, for the sake of my own sanity if nothing else */
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nkeynes@270 | 229 | uint16_t *p = (uint16_t *)input;
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nkeynes@270 | 230 | int i;
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nkeynes@270 | 231 | for( i=0; i<256; i++ ) {
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nkeynes@270 | 232 | codebook->quad[i][0] = *p++;
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nkeynes@270 | 233 | codebook->quad[i][2] = *p++;
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nkeynes@270 | 234 | codebook->quad[i][1] = *p++;
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nkeynes@270 | 235 | codebook->quad[i][3] = *p++;
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nkeynes@270 | 236 | }
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nkeynes@270 | 237 | }
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nkeynes@270 | 238 |
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nkeynes@311 | 239 | static void vq_decode( uint16_t *output, char *input, int width, int height,
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nkeynes@311 | 240 | struct vq_codebook *codebook ) {
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nkeynes@224 | 241 | int i,j;
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nkeynes@224 | 242 |
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nkeynes@270 | 243 | uint8_t *c = (uint8_t *)input;
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nkeynes@311 | 244 | for( j=0; j<height; j+=2 ) {
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nkeynes@311 | 245 | for( i=0; i<width; i+=2 ) {
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nkeynes@313 | 246 | uint8_t code = *c++;
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nkeynes@311 | 247 | output[i + j*width] = codebook->quad[code][0];
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nkeynes@311 | 248 | output[i + 1 + j*width] = codebook->quad[code][1];
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nkeynes@311 | 249 | output[i + (j+1)*width] = codebook->quad[code][2];
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nkeynes@311 | 250 | output[i + 1 + (j+1)*width] = codebook->quad[code][3];
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nkeynes@224 | 251 | }
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nkeynes@224 | 252 | }
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nkeynes@224 | 253 | }
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nkeynes@113 | 254 |
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nkeynes@282 | 255 | static inline uint32_t yuv_to_rgb32( float y, float u, float v )
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nkeynes@282 | 256 | {
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nkeynes@282 | 257 | u -= 128;
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nkeynes@282 | 258 | v -= 128;
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nkeynes@282 | 259 | int r = (int)(y + v*1.375);
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nkeynes@282 | 260 | int g = (int)(y - u*0.34375 - v*0.6875);
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nkeynes@282 | 261 | int b = (int)(y + u*1.71875);
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nkeynes@282 | 262 | if( r > 255 ) { r = 255; } else if( r < 0 ) { r = 0; }
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nkeynes@282 | 263 | if( g > 255 ) { g = 255; } else if( g < 0 ) { g = 0; }
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nkeynes@282 | 264 | if( b > 255 ) { b = 255; } else if( b < 0 ) { b = 0; }
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nkeynes@289 | 265 | return 0xFF000000 | (r<<16) | (g<<8) | (b);
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nkeynes@282 | 266 | }
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nkeynes@282 | 267 |
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nkeynes@282 | 268 |
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nkeynes@282 | 269 | /**
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nkeynes@311 | 270 | * Convert raster YUV texture data into RGB32 data - most GL implementations don't
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nkeynes@282 | 271 | * directly support this format unfortunately. The input data is formatted as
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nkeynes@282 | 272 | * 32 bits = 2 horizontal pixels, UYVY. This is currently done rather inefficiently
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nkeynes@282 | 273 | * in floating point.
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nkeynes@282 | 274 | */
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nkeynes@311 | 275 | static void yuv_decode( uint32_t *output, uint32_t *input, int width, int height )
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nkeynes@282 | 276 | {
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nkeynes@282 | 277 | int x, y;
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nkeynes@282 | 278 | uint32_t *p = input;
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nkeynes@282 | 279 | for( y=0; y<height; y++ ) {
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nkeynes@282 | 280 | for( x=0; x<width; x+=2 ) {
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nkeynes@282 | 281 | float u = (float)(*p & 0xFF);
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nkeynes@282 | 282 | float y0 = (float)( (*p>>8)&0xFF );
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nkeynes@282 | 283 | float v = (float)( (*p>>16)&0xFF );
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nkeynes@282 | 284 | float y1 = (float)( (*p>>24)&0xFF );
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nkeynes@282 | 285 | *output++ = yuv_to_rgb32( y0, u, v );
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nkeynes@282 | 286 | *output++ = yuv_to_rgb32( y1, u, v );
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nkeynes@287 | 287 | p++;
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nkeynes@282 | 288 | }
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nkeynes@282 | 289 | }
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nkeynes@282 | 290 | }
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nkeynes@282 | 291 |
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nkeynes@103 | 292 | /**
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nkeynes@103 | 293 | * Load texture data from the given address and parameters into the currently
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nkeynes@103 | 294 | * bound OpenGL texture.
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nkeynes@103 | 295 | */
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nkeynes@103 | 296 | static texcache_load_texture( uint32_t texture_addr, int width, int height,
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nkeynes@103 | 297 | int mode ) {
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nkeynes@284 | 298 | int bpp_shift = 1; /* bytes per (output) pixel as a power of 2 */
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nkeynes@103 | 299 | GLint intFormat, format, type;
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nkeynes@108 | 300 | int tex_format = mode & PVR2_TEX_FORMAT_MASK;
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nkeynes@270 | 301 | struct vq_codebook codebook;
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nkeynes@270 | 302 | GLint filter = GL_LINEAR;
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nkeynes@108 | 303 |
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nkeynes@270 | 304 | /* Decode the format parameters */
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nkeynes@270 | 305 | switch( tex_format ) {
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nkeynes@270 | 306 | case PVR2_TEX_FORMAT_IDX4:
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nkeynes@270 | 307 | case PVR2_TEX_FORMAT_IDX8:
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nkeynes@284 | 308 | /* For indexed-colour modes, we need to lookup the palette control
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nkeynes@284 | 309 | * word to determine the de-indexed texture format.
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nkeynes@284 | 310 | */
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nkeynes@191 | 311 | switch( MMIO_READ( PVR2, RENDER_PALETTE ) & 0x03 ) {
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nkeynes@108 | 312 | case 0: /* ARGB1555 */
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nkeynes@108 | 313 | intFormat = GL_RGB5_A1;
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nkeynes@108 | 314 | format = GL_RGBA;
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nkeynes@129 | 315 | type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
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nkeynes@108 | 316 | break;
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nkeynes@284 | 317 | case 1: /* RGB565 */
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nkeynes@300 | 318 | intFormat = GL_RGB5;
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nkeynes@108 | 319 | format = GL_RGB;
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nkeynes@300 | 320 | type = GL_UNSIGNED_SHORT_5_6_5;
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nkeynes@108 | 321 | break;
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nkeynes@284 | 322 | case 2: /* ARGB4444 */
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nkeynes@108 | 323 | intFormat = GL_RGBA4;
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nkeynes@129 | 324 | format = GL_BGRA;
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nkeynes@129 | 325 | type = GL_UNSIGNED_SHORT_4_4_4_4_REV;
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nkeynes@108 | 326 | break;
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nkeynes@284 | 327 | case 3: /* ARGB8888 */
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nkeynes@108 | 328 | intFormat = GL_RGBA8;
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nkeynes@113 | 329 | format = GL_BGRA;
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nkeynes@113 | 330 | type = GL_UNSIGNED_INT_8_8_8_8_REV;
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nkeynes@284 | 331 | bpp_shift = 2;
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nkeynes@108 | 332 | break;
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nkeynes@108 | 333 | }
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nkeynes@270 | 334 | break;
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nkeynes@270 | 335 |
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nkeynes@270 | 336 | case PVR2_TEX_FORMAT_ARGB1555:
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nkeynes@270 | 337 | intFormat = GL_RGB5_A1;
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nkeynes@270 | 338 | format = GL_RGBA;
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nkeynes@270 | 339 | type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
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nkeynes@270 | 340 | break;
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nkeynes@270 | 341 | case PVR2_TEX_FORMAT_RGB565:
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nkeynes@300 | 342 | intFormat = GL_RGB5;
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nkeynes@270 | 343 | format = GL_RGB;
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nkeynes@300 | 344 | type = GL_UNSIGNED_SHORT_5_6_5;
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nkeynes@270 | 345 | break;
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nkeynes@270 | 346 | case PVR2_TEX_FORMAT_ARGB4444:
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nkeynes@270 | 347 | intFormat = GL_RGBA4;
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nkeynes@270 | 348 | format = GL_BGRA;
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nkeynes@270 | 349 | type = GL_UNSIGNED_SHORT_4_4_4_4_REV;
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nkeynes@270 | 350 | break;
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nkeynes@270 | 351 | case PVR2_TEX_FORMAT_YUV422:
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nkeynes@284 | 352 | /* YUV422 isn't directly supported by most implementations, so decode
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nkeynes@284 | 353 | * it to a (reasonably) standard ARGB32.
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nkeynes@284 | 354 | */
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nkeynes@284 | 355 | bpp_shift = 2;
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nkeynes@282 | 356 | intFormat = GL_RGBA8;
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nkeynes@282 | 357 | format = GL_BGRA;
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nkeynes@282 | 358 | type = GL_UNSIGNED_INT_8_8_8_8_REV;
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nkeynes@270 | 359 | break;
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nkeynes@270 | 360 | case PVR2_TEX_FORMAT_BUMPMAP:
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nkeynes@270 | 361 | ERROR( "Bumpmap not supported" );
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nkeynes@270 | 362 | break;
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nkeynes@270 | 363 | }
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nkeynes@270 | 364 |
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nkeynes@321 | 365 | if( PVR2_TEX_IS_STRIDE(mode) && tex_format != PVR2_TEX_FORMAT_IDX4 &&
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nkeynes@321 | 366 | tex_format != PVR2_TEX_FORMAT_IDX8 ) {
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nkeynes@284 | 367 | /* Stride textures cannot be mip-mapped, compressed, indexed or twiddled */
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nkeynes@284 | 368 | uint32_t stride = (MMIO_READ( PVR2, RENDER_TEXSIZE ) & 0x003F) << 5;
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nkeynes@284 | 369 | char data[(width*height) << bpp_shift];
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nkeynes@284 | 370 | if( tex_format == PVR2_TEX_FORMAT_YUV422 ) {
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nkeynes@284 | 371 | char tmp[(width*height)<<1];
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nkeynes@291 | 372 | pvr2_vram64_read_stride( tmp, width<<1, texture_addr, stride<<1, height );
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nkeynes@311 | 373 | yuv_decode( (uint32_t *)data, (uint32_t *)tmp, width, height );
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nkeynes@284 | 374 | } else {
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nkeynes@291 | 375 | pvr2_vram64_read_stride( data, width<<bpp_shift, texture_addr, stride<<bpp_shift, height );
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nkeynes@284 | 376 | }
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nkeynes@284 | 377 | glTexImage2D( GL_TEXTURE_2D, 0, intFormat, width, height, 0, format, type, data );
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nkeynes@284 | 378 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
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nkeynes@284 | 379 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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nkeynes@284 | 380 | return;
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nkeynes@284 | 381 | }
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nkeynes@284 | 382 |
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nkeynes@284 | 383 | int level=0, last_level = 0, mip_width = width, mip_height = height, mip_bytes;
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nkeynes@270 | 384 | if( PVR2_TEX_IS_MIPMAPPED(mode) ) {
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nkeynes@270 | 385 | int i;
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nkeynes@311 | 386 | for( i=0; 1<<i < width; i++ );
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nkeynes@270 | 387 | last_level = i;
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nkeynes@313 | 388 | mip_width = 2;
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nkeynes@313 | 389 | mip_height= 2;
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nkeynes@270 | 390 | filter = GL_LINEAR_MIPMAP_LINEAR;
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nkeynes@270 | 391 | }
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nkeynes@300 | 392 | mip_bytes = (mip_width * mip_height) << bpp_shift;
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nkeynes@108 | 393 |
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nkeynes@270 | 394 | if( PVR2_TEX_IS_COMPRESSED(mode) ) {
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nkeynes@270 | 395 | uint16_t tmp[VQ_CODEBOOK_SIZE];
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nkeynes@270 | 396 | pvr2_vram64_read( (char *)tmp, texture_addr, VQ_CODEBOOK_SIZE );
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nkeynes@270 | 397 | texture_addr += VQ_CODEBOOK_SIZE;
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nkeynes@270 | 398 | vq_get_codebook( &codebook, tmp );
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nkeynes@270 | 399 | }
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nkeynes@270 | 400 |
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nkeynes@270 | 401 | for( level=last_level; level>= 0; level-- ) {
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nkeynes@270 | 402 | char data[mip_bytes];
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nkeynes@270 | 403 | /* load data from image, detwiddling/uncompressing as required */
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nkeynes@108 | 404 | if( tex_format == PVR2_TEX_FORMAT_IDX8 ) {
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nkeynes@284 | 405 | int inputlength = mip_bytes >> bpp_shift;
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nkeynes@108 | 406 | int bank = (mode >> 25) &0x03;
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nkeynes@321 | 407 | uint32_t *palette = (uint32_t *)(mmio_region_PVR2PAL.mem + (bank * (256 << bpp_shift)));
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nkeynes@270 | 408 | char tmp[inputlength];
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nkeynes@311 | 409 | pvr2_vram64_read_twiddled_8( tmp, texture_addr, mip_width, mip_height );
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nkeynes@284 | 410 | if( bpp_shift == 2 ) {
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nkeynes@321 | 411 | decode_pal8_to_32( (uint32_t *)data, tmp, inputlength, palette );
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nkeynes@113 | 412 | } else {
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nkeynes@321 | 413 | decode_pal8_to_16( (uint16_t *)data, tmp, inputlength, palette );
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nkeynes@108 | 414 | }
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nkeynes@315 | 415 | } else if( tex_format == PVR2_TEX_FORMAT_IDX4 ) {
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nkeynes@315 | 416 | int inputlength = (mip_width * mip_height) >> 1;
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nkeynes@315 | 417 | int bank = (mode >>21 ) & 0x3F;
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nkeynes@321 | 418 | uint32_t *palette = (uint32_t *)(mmio_region_PVR2PAL.mem + (bank * (16 << bpp_shift)));
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nkeynes@315 | 419 | char tmp[inputlength];
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nkeynes@315 | 420 | pvr2_vram64_read_twiddled_4( tmp, texture_addr, mip_width, mip_height );
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nkeynes@315 | 421 | if( bpp_shift == 2 ) {
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nkeynes@321 | 422 | decode_pal4_to_32( (uint32_t *)data, tmp, inputlength, palette );
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nkeynes@315 | 423 | } else {
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nkeynes@321 | 424 | decode_pal4_to_16( (uint16_t *)data, tmp, inputlength, palette );
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nkeynes@315 | 425 | }
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nkeynes@282 | 426 | } else if( tex_format == PVR2_TEX_FORMAT_YUV422 ) {
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nkeynes@282 | 427 | int inputlength = ((mip_width*mip_height)<<1);
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nkeynes@282 | 428 | char tmp[inputlength];
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nkeynes@314 | 429 | if( PVR2_TEX_IS_TWIDDLED(mode) ) {
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nkeynes@314 | 430 | pvr2_vram64_read_twiddled_16( tmp, texture_addr, mip_width, mip_height );
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nkeynes@314 | 431 | } else {
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nkeynes@314 | 432 | pvr2_vram64_read( tmp, texture_addr, inputlength );
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nkeynes@314 | 433 | }
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nkeynes@311 | 434 | yuv_decode( (uint32_t *)data, (uint32_t *)tmp, mip_width, mip_height );
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nkeynes@270 | 435 | } else if( PVR2_TEX_IS_COMPRESSED(mode) ) {
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nkeynes@270 | 436 | int inputlength = ((mip_width*mip_height) >> 2);
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nkeynes@270 | 437 | char tmp[inputlength];
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nkeynes@311 | 438 | if( PVR2_TEX_IS_TWIDDLED(mode) ) {
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nkeynes@313 | 439 | pvr2_vram64_read_twiddled_8( tmp, texture_addr, mip_width>>1, mip_height>>1 );
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nkeynes@311 | 440 | } else {
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nkeynes@311 | 441 | pvr2_vram64_read( tmp, texture_addr, inputlength );
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nkeynes@311 | 442 | }
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nkeynes@311 | 443 | vq_decode( (uint16_t *)data, tmp, mip_width, mip_height, &codebook );
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nkeynes@270 | 444 | } else if( PVR2_TEX_IS_TWIDDLED(mode) ) {
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nkeynes@311 | 445 | pvr2_vram64_read_twiddled_16( data, texture_addr, mip_width, mip_height );
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nkeynes@270 | 446 | } else {
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nkeynes@270 | 447 | pvr2_vram64_read( data, texture_addr, mip_bytes );
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nkeynes@108 | 448 | }
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nkeynes@313 | 449 |
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nkeynes@108 | 450 | /* Pass to GL */
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nkeynes@313 | 451 | if( level == last_level && level != 0 ) { /* 1x1 stored within a 2x2 */
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nkeynes@313 | 452 | glTexImage2D( GL_TEXTURE_2D, level, intFormat, 1, 1, 0, format, type,
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nkeynes@313 | 453 | data + (3 << bpp_shift) );
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nkeynes@313 | 454 | } else {
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nkeynes@313 | 455 | glTexImage2D( GL_TEXTURE_2D, level, intFormat, mip_width, mip_height, 0, format, type,
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nkeynes@313 | 456 | data );
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nkeynes@313 | 457 | texture_addr += mip_bytes;
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nkeynes@313 | 458 | mip_width <<= 1;
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nkeynes@313 | 459 | mip_height <<= 1;
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nkeynes@313 | 460 | mip_bytes <<= 2;
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nkeynes@313 | 461 | }
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nkeynes@103 | 462 | }
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nkeynes@270 | 463 |
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nkeynes@270 | 464 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
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nkeynes@108 | 465 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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nkeynes@103 | 466 | }
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nkeynes@103 | 467 |
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nkeynes@103 | 468 | /**
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nkeynes@103 | 469 | * Return a texture ID for the texture specified at the supplied address
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nkeynes@103 | 470 | * and given parameters (the same sequence of bytes could in theory have
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nkeynes@103 | 471 | * multiple interpretations). We use the texture address as the primary
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nkeynes@103 | 472 | * index, but allow for multiple instances at each address. The texture
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nkeynes@103 | 473 | * will be bound to the GL_TEXTURE_2D target before being returned.
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nkeynes@103 | 474 | *
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nkeynes@103 | 475 | * If the texture has already been bound, return the ID to which it was
|
nkeynes@103 | 476 | * bound. Otherwise obtain an unused texture ID and set it up appropriately.
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nkeynes@103 | 477 | */
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nkeynes@103 | 478 | GLuint texcache_get_texture( uint32_t texture_addr, int width, int height,
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nkeynes@103 | 479 | int mode )
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nkeynes@103 | 480 | {
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nkeynes@103 | 481 | uint32_t texture_page = texture_addr >> 12;
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nkeynes@103 | 482 | texcache_entry_index idx = texcache_page_lookup[texture_page];
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nkeynes@103 | 483 | while( idx != EMPTY_ENTRY ) {
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nkeynes@103 | 484 | texcache_entry_t entry = &texcache_active_list[idx];
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nkeynes@103 | 485 | if( entry->texture_addr == texture_addr &&
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nkeynes@103 | 486 | entry->mode == mode &&
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nkeynes@103 | 487 | entry->width == width &&
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nkeynes@103 | 488 | entry->height == height ) {
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nkeynes@103 | 489 | entry->lru_count = texcache_ref_counter++;
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nkeynes@103 | 490 | glBindTexture( GL_TEXTURE_2D, entry->texture_id );
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nkeynes@103 | 491 | return entry->texture_id;
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nkeynes@103 | 492 | }
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nkeynes@103 | 493 | idx = entry->next;
|
nkeynes@103 | 494 | }
|
nkeynes@103 | 495 |
|
nkeynes@103 | 496 | /* Not found - check the free list */
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nkeynes@103 | 497 | int slot = 0;
|
nkeynes@103 | 498 |
|
nkeynes@103 | 499 | if( texcache_free_ptr < MAX_TEXTURES ) {
|
nkeynes@103 | 500 | slot = texcache_free_list[texcache_free_ptr++];
|
nkeynes@103 | 501 | } else {
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nkeynes@103 | 502 | slot = texcache_evict();
|
nkeynes@103 | 503 | }
|
nkeynes@103 | 504 |
|
nkeynes@103 | 505 | /* Construct new entry */
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nkeynes@103 | 506 | texcache_active_list[slot].texture_addr = texture_addr;
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nkeynes@103 | 507 | texcache_active_list[slot].width = width;
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nkeynes@103 | 508 | texcache_active_list[slot].height = height;
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nkeynes@103 | 509 | texcache_active_list[slot].mode = mode;
|
nkeynes@103 | 510 | texcache_active_list[slot].lru_count = texcache_ref_counter++;
|
nkeynes@103 | 511 |
|
nkeynes@103 | 512 | /* Add entry to the lookup table */
|
nkeynes@103 | 513 | texcache_active_list[slot].next = texcache_page_lookup[texture_page];
|
nkeynes@103 | 514 | texcache_page_lookup[texture_page] = slot;
|
nkeynes@103 | 515 |
|
nkeynes@103 | 516 | /* Construct the GL texture */
|
nkeynes@108 | 517 | glBindTexture( GL_TEXTURE_2D, texcache_active_list[slot].texture_id );
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nkeynes@103 | 518 | texcache_load_texture( texture_addr, width, height, mode );
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nkeynes@103 | 519 |
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nkeynes@103 | 520 | return texcache_active_list[slot].texture_id;
|
nkeynes@103 | 521 | }
|