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(svn r3017) -NewGRF: Implement sprite group unreferencing and unloading.

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peter1138
2005-10-04 21:42:00 +00:00
parent c655e13e92
commit abe60acbbb
5 changed files with 157 additions and 3 deletions
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70
sprite.c
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@@ -4,6 +4,7 @@
#include "openttd.h"
#include "sprite.h"
#include "variables.h"
#include "debug.h"
SpriteGroup *EvalDeterministicSpriteGroup(const DeterministicSpriteGroup *dsg, int value)
@@ -96,3 +97,72 @@ byte RandomizedSpriteGroupTriggeredBits(const RandomizedSpriteGroup *rsg,
return (rsg->num_groups - 1) << rsg->lowest_randbit;
}
/**
* Traverse a sprite group and release its and its child's memory.
* A group is only released if its reference count is zero.
* We pass a pointer to a pointer so that the original reference can be set to NULL.
* @param group_ptr Pointer to sprite group reference.
*/
void UnloadSpriteGroup(SpriteGroup **group_ptr)
{
SpriteGroup *group;
int i;
assert(group_ptr != NULL);
assert(*group_ptr != NULL);
group = *group_ptr;
*group_ptr = NULL; // Remove this reference.
group->ref_count--;
if (group->ref_count > 0) {
DEBUG(grf, 6)("UnloadSpriteGroup: Group at `%p' (type %d) has %d reference(s) left.", group, group->type, group->ref_count);
return; // Still some references left, so don't clear up.
}
DEBUG(grf, 6)("UnloadSpriteGroup: Releasing group at `%p'.", group);
switch (group->type) {
case SGT_REAL:
{
RealSpriteGroup *rsg = &group->g.real;
for (i = 0; i < rsg->loading_count; i++) {
UnloadSpriteGroup(&rsg->loading[i]);
}
for (i = 0; i < rsg->loaded_count; i++) {
UnloadSpriteGroup(&rsg->loaded[i]);
}
free(group);
return;
}
case SGT_DETERMINISTIC:
{
DeterministicSpriteGroup *dsg = &group->g.determ;
for (i = 0; i < group->g.determ.num_ranges; i++) {
UnloadSpriteGroup(&dsg->ranges[i].group);
}
UnloadSpriteGroup(&dsg->default_group);
free(group->g.determ.ranges);
free(group);
return;
}
case SGT_RANDOMIZED:
{
for (i = 0; i < group->g.random.num_groups; i++) {
UnloadSpriteGroup(&group->g.random.groups[i]);
}
free(group->g.random.groups);
free(group);
return;
}
case SGT_CALLBACK:
case SGT_RESULT:
free(group);
return;
}
DEBUG(grf, 1)("Unable to remove unknown sprite group type `0x%x'.", group->type);
}