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Location: cpp/openttd-patchpack/source/src/spritecache.cpp - annotation
r6395:cb11d86befed
9.0 KiB
text/x-c
(svn r9525) -Update: WebTranslator2 update to 2007-03-29 19:56:13
estonian - 3 fixed, 4 changed by kristjans (7)
finnish - 2 fixed by pallokala (2)
italian - 1 changed by lorenzodv (1)
traditional_chinese - 1 changed by xbddc (1)
turkish - 12 fixed by jnmbk (12)
estonian - 3 fixed, 4 changed by kristjans (7)
finnish - 2 fixed by pallokala (2)
italian - 1 changed by lorenzodv (1)
traditional_chinese - 1 changed by xbddc (1)
turkish - 12 fixed by jnmbk (12)
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#include "stdafx.h"
#include "openttd.h"
#include "debug.h"
#include "functions.h"
#include "macros.h"
#include "spritecache.h"
#include "table/sprites.h"
#include "fileio.h"
#include "helpers.hpp"
#ifndef SPRITE_CACHE_SIZE
# define SPRITE_CACHE_SIZE 2*1024*1024
#endif /* SPRITE_CACHE_SIZE */
struct SpriteCache {
void *ptr;
uint32 file_pos;
int16 lru;
};
static uint _spritecache_items = 0;
static SpriteCache *_spritecache = NULL;
static inline SpriteCache *GetSpriteCache(uint index)
{
return &_spritecache[index];
}
static SpriteCache *AllocateSpriteCache(uint index)
{
if (index >= _spritecache_items) {
/* Add another 1024 items to the 'pool' */
uint items = ALIGN(index + 1, 1024);
DEBUG(sprite, 4, "Increasing sprite cache to %d items (%d bytes)", items, items * sizeof(*_spritecache));
_spritecache = ReallocT(_spritecache, items);
if (_spritecache == NULL) {
error("Unable to allocate sprite cache of %d items (%d bytes)", items, items * sizeof(*_spritecache));
}
/* Reset the new items and update the count */
memset(_spritecache + _spritecache_items, 0, (items - _spritecache_items) * sizeof(*_spritecache));
_spritecache_items = items;
}
return GetSpriteCache(index);
}
struct MemBlock {
uint32 size;
byte data[VARARRAY_SIZE];
};
static uint _sprite_lru_counter;
static MemBlock *_spritecache_ptr;
static int _compact_cache_counter;
static void CompactSpriteCache();
static bool ReadSpriteHeaderSkipData()
{
uint16 num = FioReadWord();
byte type;
if (num == 0) return false;
type = FioReadByte();
if (type == 0xFF) {
FioSkipBytes(num);
/* Some NewGRF files have "empty" pseudo-sprites which are 1
* byte long. Catch these so the sprites won't be displayed. */
return num != 1;
}
FioSkipBytes(7);
num -= 8;
if (num == 0) return true;
if (type & 2) {
FioSkipBytes(num);
} else {
while (num > 0) {
int8 i = FioReadByte();
if (i >= 0) {
num -= i;
FioSkipBytes(i);
} else {
i = -(i >> 3);
num -= i;
FioReadByte();
}
}
}
return true;
}
/* Check if the given Sprite ID exists */
bool SpriteExists(SpriteID id)
{
/* Special case for Sprite ID zero -- its position is also 0... */
if (id == 0) return true;
if (id >= _spritecache_items) return false;
return GetSpriteCache(id)->file_pos != 0;
}
static void* AllocSprite(size_t);
static void* ReadSprite(SpriteCache *sc, SpriteID id)
{
uint num;
byte type;
DEBUG(sprite, 9, "Load sprite %d", id);
if (!SpriteExists(id)) {
DEBUG(sprite, 1, "Tried to load non-existing sprite #%d. Probable cause: Wrong/missing NewGRFs", id);
/* SPR_IMG_QUERY is a BIG FAT RED ? */
id = SPR_IMG_QUERY;
sc = GetSpriteCache(SPR_IMG_QUERY);
}
FioSeekToFile(sc->file_pos);
num = FioReadWord();
type = FioReadByte();
if (type == 0xFF) {
byte* dest = (byte*)AllocSprite(num);
sc->ptr = dest;
FioReadBlock(dest, num);
return dest;
} else {
uint height = FioReadByte();
uint width = FioReadWord();
Sprite* sprite;
byte* dest;
num = (type & 0x02) ? width * height : num - 8;
sprite = (Sprite*)AllocSprite(sizeof(*sprite) + num);
sc->ptr = sprite;
sprite->info = type;
sprite->height = (id != 142) ? height : 10; // Compensate for a TTD bug
sprite->width = width;
sprite->x_offs = FioReadWord();
sprite->y_offs = FioReadWord();
dest = sprite->data;
while (num > 0) {
int8 i = FioReadByte();
if (i >= 0) {
num -= i;
for (; i > 0; --i) *dest++ = FioReadByte();
} else {
const byte* rel = dest - (((i & 7) << 8) | FioReadByte());
i = -(i >> 3);
num -= i;
for (; i > 0; --i) *dest++ = *rel++;
}
}
return sprite;
}
}
bool LoadNextSprite(int load_index, byte file_index)
{
SpriteCache *sc;
uint32 file_pos = FioGetPos() | (file_index << 24);
if (!ReadSpriteHeaderSkipData()) return false;
if (load_index >= MAX_SPRITES) {
error("Tried to load too many sprites (#%d; max %d)", load_index, MAX_SPRITES);
}
sc = AllocateSpriteCache(load_index);
sc->file_pos = file_pos;
sc->ptr = NULL;
sc->lru = 0;
return true;
}
void DupSprite(SpriteID old_spr, SpriteID new_spr)
{
SpriteCache *scold = GetSpriteCache(old_spr);
SpriteCache *scnew = AllocateSpriteCache(new_spr);
scnew->file_pos = scold->file_pos;
scnew->ptr = NULL;
}
void SkipSprites(uint count)
{
for (; count > 0; --count) {
if (!ReadSpriteHeaderSkipData()) return;
}
}
#define S_FREE_MASK 1
static inline MemBlock* NextBlock(MemBlock* block)
{
return (MemBlock*)((byte*)block + (block->size & ~S_FREE_MASK));
}
static uint32 GetSpriteCacheUsage()
{
uint32 tot_size = 0;
MemBlock* s;
for (s = _spritecache_ptr; s->size != 0; s = NextBlock(s))
if (!(s->size & S_FREE_MASK)) tot_size += s->size;
return tot_size;
}
void IncreaseSpriteLRU()
{
// Increase all LRU values
if (_sprite_lru_counter > 16384) {
SpriteID i;
DEBUG(sprite, 3, "Fixing lru %d, inuse=%d", _sprite_lru_counter, GetSpriteCacheUsage());
for (i = 0; i != _spritecache_items; i++) {
SpriteCache *sc = GetSpriteCache(i);
if (sc->ptr != NULL) {
if (sc->lru >= 0) {
sc->lru = -1;
} else if (sc->lru != -32768) {
sc->lru--;
}
}
}
_sprite_lru_counter = 0;
}
// Compact sprite cache every now and then.
if (++_compact_cache_counter >= 740) {
CompactSpriteCache();
_compact_cache_counter = 0;
}
}
// Called when holes in the sprite cache should be removed.
// That is accomplished by moving the cached data.
static void CompactSpriteCache()
{
MemBlock *s;
DEBUG(sprite, 3, "Compacting sprite cache, inuse=%d", GetSpriteCacheUsage());
for (s = _spritecache_ptr; s->size != 0;) {
if (s->size & S_FREE_MASK) {
MemBlock* next = NextBlock(s);
MemBlock temp;
SpriteID i;
// Since free blocks are automatically coalesced, this should hold true.
assert(!(next->size & S_FREE_MASK));
// If the next block is the sentinel block, we can safely return
if (next->size == 0)
break;
// Locate the sprite belonging to the next pointer.
for (i = 0; GetSpriteCache(i)->ptr != next->data; i++) {
assert(i != _spritecache_items);
}
GetSpriteCache(i)->ptr = s->data; // Adjust sprite array entry
// Swap this and the next block
temp = *s;
memmove(s, next, next->size);
s = NextBlock(s);
*s = temp;
// Coalesce free blocks
while (NextBlock(s)->size & S_FREE_MASK) {
s->size += NextBlock(s)->size & ~S_FREE_MASK;
}
} else {
s = NextBlock(s);
}
}
}
static void DeleteEntryFromSpriteCache()
{
SpriteID i;
uint best = UINT_MAX;
MemBlock* s;
int cur_lru;
DEBUG(sprite, 3, "DeleteEntryFromSpriteCache, inuse=%d", GetSpriteCacheUsage());
cur_lru = 0xffff;
for (i = 0; i != _spritecache_items; i++) {
SpriteCache *sc = GetSpriteCache(i);
if (sc->ptr != NULL && sc->lru < cur_lru) {
cur_lru = sc->lru;
best = i;
}
}
// Display an error message and die, in case we found no sprite at all.
// This shouldn't really happen, unless all sprites are locked.
if (best == (uint)-1)
error("Out of sprite memory");
// Mark the block as free (the block must be in use)
s = (MemBlock*)GetSpriteCache(best)->ptr - 1;
assert(!(s->size & S_FREE_MASK));
s->size |= S_FREE_MASK;
GetSpriteCache(best)->ptr = NULL;
// And coalesce adjacent free blocks
for (s = _spritecache_ptr; s->size != 0; s = NextBlock(s)) {
if (s->size & S_FREE_MASK) {
while (NextBlock(s)->size & S_FREE_MASK) {
s->size += NextBlock(s)->size & ~S_FREE_MASK;
}
}
}
}
static void* AllocSprite(size_t mem_req)
{
mem_req += sizeof(MemBlock);
/* Align this to an uint32 boundary. This also makes sure that the 2 least
* bits are not used, so we could use those for other things. */
mem_req = ALIGN(mem_req, sizeof(uint32));
for (;;) {
MemBlock* s;
for (s = _spritecache_ptr; s->size != 0; s = NextBlock(s)) {
if (s->size & S_FREE_MASK) {
size_t cur_size = s->size & ~S_FREE_MASK;
/* Is the block exactly the size we need or
* big enough for an additional free block? */
if (cur_size == mem_req ||
cur_size >= mem_req + sizeof(MemBlock)) {
// Set size and in use
s->size = mem_req;
// Do we need to inject a free block too?
if (cur_size != mem_req) {
NextBlock(s)->size = (cur_size - mem_req) | S_FREE_MASK;
}
return s->data;
}
}
}
// Reached sentinel, but no block found yet. Delete some old entry.
DeleteEntryFromSpriteCache();
}
}
const void *GetRawSprite(SpriteID sprite)
{
SpriteCache *sc;
void* p;
assert(sprite < _spritecache_items);
sc = GetSpriteCache(sprite);
// Update LRU
sc->lru = ++_sprite_lru_counter;
p = sc->ptr;
// Load the sprite, if it is not loaded, yet
if (p == NULL) p = ReadSprite(sc, sprite);
return p;
}
void GfxInitSpriteMem()
{
// initialize sprite cache heap
if (_spritecache_ptr == NULL) _spritecache_ptr = (MemBlock*)malloc(SPRITE_CACHE_SIZE);
// A big free block
_spritecache_ptr->size = (SPRITE_CACHE_SIZE - sizeof(MemBlock)) | S_FREE_MASK;
// Sentinel block (identified by size == 0)
NextBlock(_spritecache_ptr)->size = 0;
/* Reset the spritecache 'pool' */
free(_spritecache);
_spritecache_items = 0;
_spritecache = NULL;
_compact_cache_counter = 0;
}
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