Started asset refact

archive/asset/asset.c

@@ -0,0 +1,139 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "asset.h"
+#include "assetmanager.h"
+#include "util/memory.h"
+#include "assert/assert.h"
+
+assetdef_t ASSET_DEFINITIONS[ASSET_TYPE_COUNT] = {
+  [ASSET_TYPE_PALETTE_IMAGE] = {
+    "DPI", assetPaletteImageLoad, assetPaletteImageDispose
+  },
+  [ASSET_TYPE_ALPHA_IMAGE] = {
+    "DAI", assetAlphaImageLoad, assetAlphaImageDispose
+  },
+};
+
+errorret_t assetInit(asset_t *asset, const char_t *filename) {
+  assertNotNull(asset, "Asset cannot be NULL.");
+  assertNotNull(filename, "Filename cannot be NULL.");
+  assertTrue(strlen(filename) < FILENAME_MAX, "Filename too long.");
+  assertTrue(strlen(filename) > 0, "Filename cannot be empty.");
+
+  memoryZero(asset, sizeof(asset_t));
+  memoryCopy(asset->filename, filename, strlen(filename) + 1);
+
+  // Initialze the reference list.
+  refListInit(
+    &asset->refList,
+    asset->refListArray,
+    ASSET_REFERENCE_COUNT_MAX
+  );
+
+  // Test the file can be opened. In future I may make the handle stay open for
+  // a while to see if it increases performance and stops disk thrashing.
+  asset->file = zip_fopen(ASSET_MANAGER.zip, filename, 0);
+  if(asset->file == NULL) errorThrow("Failed to open asset file: %s", filename);
+  zip_fclose(asset->file);
+  asset->file = NULL;
+  errorOk();
+}
+
+ref_t assetLock(asset_t *asset) {
+  assertNotNull(asset, "Asset cannot be NULL.");
+
+  return refListLock(&asset->refList);
+}
+
+void assetUnlock(asset_t *asset, const ref_t ref) {
+  assertNotNull(asset, "Asset cannot be NULL.");
+
+  // Just unlock the reference in the reference list.
+  refListUnlock(&asset->refList, ref);
+}
+
+errorret_t assetLoad(asset_t *asset) {
+  assertNotNull(asset, "Asset cannot be NULL.");
+  assertTrue(
+    asset->state == ASSET_STATE_NOT_LOADED,
+    "Asset is already loaded or loading."
+  );
+
+  // Mark as loading.
+  asset->state = ASSET_STATE_LOADING;
+
+  // Open the file.
+  if(asset->file == NULL) {
+    asset->file = zip_fopen(ASSET_MANAGER.zip, asset->filename, 0);
+    if(asset->file == NULL) {
+      asset->state = ASSET_STATE_ERROR;
+      errorThrow("Failed to open asset file: %s", asset->filename);
+    }
+  }
+
+  // Read header.
+  char_t header[ASSET_HEADER_SIZE + 1];
+  memoryZero(header, ASSET_HEADER_SIZE + 1);
+  zip_int64_t bytesRead = zip_fread(asset->file, header, ASSET_HEADER_SIZE);
+  if(bytesRead != ASSET_HEADER_SIZE) {
+    asset->state = ASSET_STATE_ERROR;
+    zip_fclose(asset->file);
+    asset->file = NULL;
+    errorThrow("Failed to read asset header for: %s", asset->filename);
+  }
+
+  // Check header.
+  if(strlen(header) != ASSET_HEADER_SIZE) {
+    asset->state = ASSET_STATE_ERROR;
+    zip_fclose(asset->file);
+    asset->file = NULL;
+    errorThrow("Invalid asset header for: %s", asset->filename);
+  }
+
+  // Get the asset definition based on the header.
+  assetdef_t *def;
+  for(uint_fast8_t i = 0; i < ASSET_TYPE_COUNT; i++) {
+    if(strcmp(header, ASSET_DEFINITIONS[i].header) == 0) {
+      def = &ASSET_DEFINITIONS[i];
+      asset->type = i;
+      break;
+    }
+  }
+  assertNotNull(def, "Failed to find asset definition for header.");
+
+  // Load the asset
+  errorret_t ret = def->load(asset);
+  if(ret.code != ERROR_OK) {
+    asset->state = ASSET_STATE_ERROR;
+    zip_fclose(asset->file);
+    asset->file = NULL;
+    errorChain(ret);
+  }
+
+  // Finished loading.
+  asset->state = ASSET_STATE_LOADED;
+  zip_fclose(asset->file);
+  asset->file = NULL;
+  errorOk();
+}
+
+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;
+  }
+}