diff options
Diffstat (limited to 'sprite.c')
| -rw-r--r-- | sprite.c | 70 |
1 files changed, 70 insertions, 0 deletions
@@ -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); +} |