Render text working.

src/asset/asset.c

@@ -12,7 +12,12 @@
 #include "console/console.h"
 
 assetdef_t ASSET_DEFINITIONS[ASSET_TYPE_COUNT] = {
-  [ASSET_TYPE_PALETTE_IMAGE] = { "DPI", assetPaletteImageLoad },
+  [ASSET_TYPE_PALETTE_IMAGE] = {
+    "DPI", assetPaletteImageLoad, assetPaletteImageDispose
+  },
+  [ASSET_TYPE_ALPHA_IMAGE]   = {
+    "DAI", assetAlphaImageLoad, assetAlphaImageDispose
+  },
 };
 
 errorret_t assetInit(asset_t *asset, const char_t *filename) {
@@ -50,7 +55,6 @@ ref_t assetLock(asset_t *asset) {
 
 void assetUnlock(asset_t *asset, const ref_t ref) {
   assertNotNull(asset, "Asset cannot be NULL.");
-  assertTrue(ref > 0, "Reference must be greater than 0.");
 
   // Just unlock the reference in the reference list.
   refListUnlock(&asset->refList, ref);
@@ -121,9 +125,16 @@ errorret_t assetLoad(asset_t *asset) {
   errorOk();
 }
 
-void assetDispose(asset_t *asset) {
+errorret_t assetDispose(asset_t *asset) {
   assertNotNull(asset, "Asset cannot be NULL.");
 
+  if(asset->state == ASSET_STATE_LOADED) {
+    // Dispose of the asset based on its type.
+    assetdef_t *def = &ASSET_DEFINITIONS[asset->type];
+    if(def->dispose) errorChain(def->dispose(asset));
+    asset->state = ASSET_STATE_NOT_LOADED;
+  }
+
   if(asset->file) {
     zip_fclose(asset->file);
     asset->file = NULL;