Asset manager refactor begin.

archive/asset/CMakeLists.txt

@@ -0,0 +1,19 @@
+# Copyright (c) 2025 Dominic Masters
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Sources
+target_sources(${DUSK_TARGET_NAME}
+  PRIVATE
+    asset.c
+    assetpalette.c
+    assettileset.c
+    assetpaletteimage.c
+)
+
+# Compile definitions
+target_compile_definitions(${DUSK_TARGET_NAME}
+  PRIVATE
+    ASSET_TYPE=wad
+)

assets/CMakeLists.txt

@@ -4,6 +4,7 @@
 # https://opensource.org/licenses/MIT
 
 add_asset(PALETTE first.palette.png)
+add_asset(IMAGE minogram_6x10.png type=ALPHA)
+add_asset(IMAGE entities.png type=PALETTIZED)
 
 # add_asset(TILESET entities.tsx)
-# add_asset(IMAGE minogram_6x10.png)

src/asset/CMakeLists.txt

@@ -6,14 +6,5 @@
 # Sources
 target_sources(${DUSK_TARGET_NAME}
   PRIVATE
-    asset.c
-    assetpalette.c
-    assettileset.c
-    assetpaletteimage.c
-)
-
-# Compile definitions
-target_compile_definitions(${DUSK_TARGET_NAME}
-  PRIVATE
-    ASSET_TYPE=wad
+    assetmanager.c
 )

src/asset/assetmanager.c

@@ -0,0 +1,51 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "assetmanager.h"
+#include "util/memory.h"
+#include "console/console.h"
+#include "util/string.h"
+#include "assert/assert.h"
+
+#define ASSET_ASSET_FILE "dusk.dsk"
+
+assetmanager_t ASSET_MANAGER;
+
+errorret_t assetManagerInit(void) {
+  memoryZero(&ASSET_MANAGER, sizeof(assetmanager_t));
+
+  // Open zip file
+  char_t searchPath[FILENAME_MAX];
+  consolevar_t *var = consoleVarGet("sys_path");
+  const char_t *sysPath = var ? var->value : ".";
+  for(int32_t i = 0; i < ASSET_MANAGER_SEARCH_PATHS_COUNT; i++) {
+    sprintf(
+      searchPath,
+      ASSET_MANAGER_SEARCH_PATHS[i],
+      sysPath,
+      ASSET_ASSET_FILE
+    );
+
+    // Try open
+    ASSET_MANAGER.zip = zip_open(searchPath, ZIP_RDONLY, NULL);
+    if(ASSET_MANAGER.zip == NULL) continue;
+    consolePrint("Opened asset file: %s", searchPath);
+    break;
+  }
+  
+  // Did we open the asset?
+  if(ASSET_MANAGER.zip == NULL) errorThrow("Failed to open asset file.");
+
+  errorOk();
+}
+
+void assetManagerDispose(void) {
+  if(ASSET_MANAGER.zip != NULL) {
+    zip_close(ASSET_MANAGER.zip);
+    ASSET_MANAGER.zip = NULL;
+  }
+}

src/asset/assetmanager.h

@@ -0,0 +1,46 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "error/error.h"
+#include <zip.h>
+#include "display/texture/texture.h"
+
+#if ASSET_TYPE == wad
+#else
+  #error "Unsupported ASSET_TYPE"
+#endif
+
+static const char_t ASSET_MANAGER_SEARCH_PATHS[][FILENAME_MAX] = {
+  "%s/%s",
+  "./%s",
+  "../%s",
+  "../../%s",
+  "data/%s",
+  "../data/%s",
+};
+
+#define ASSET_MANAGER_SEARCH_PATHS_COUNT (\
+  sizeof(ASSET_MANAGER_SEARCH_PATHS) / FILENAME_MAX\
+)
+
+typedef struct {
+  int32_t nothing;
+  zip_t *zip;
+} assetmanager_t;
+
+extern assetmanager_t ASSET_MANAGER;
+
+/**
+ * Initializes the asset system.
+ */
+errorret_t assetManagerInit(void);
+
+/**
+ * Disposes/cleans up the asset system.
+ */
+void assetManagerDispose(void);

src/engine/engine.c

@@ -10,7 +10,7 @@
 #include "time/time.h"
 #include "console/console.h"
 #include "display/display.h"
-#include "asset/asset.h"
+#include "asset/assetmanager.h"
 #include "rpg/rpg.h"
 
 engine_t ENGINE;
@@ -22,7 +22,7 @@ errorret_t engineInit(void) {
   // Init systems. Order is important.
   timeInit();
   consoleInit();
-  errorChain(assetInit());
+  errorChain(assetManagerInit());
   errorChain(displayInit());
   rpgInit();
 
@@ -39,7 +39,7 @@ errorret_t engineUpdate(void) {
 
 errorret_t engineDispose(void) {
   errorChain(displayDispose());
-  assetDispose();
+  assetManagerDispose();
   consoleDispose();
 
   errorOk();

tools/assetstool/processasset.py

@@ -1,6 +1,6 @@
 import sys
 # from processtileset import processTileset
-# from processimage import processPalette, processImage
+from processimage import processImage
 from processpalette import processPalette
 
 processedAssets = []
@@ -15,8 +15,8 @@ def processAsset(asset):
   t = asset['type'].lower()
   if t == 'palette':
     return processPalette(asset)
-  # elif t == 'image':
-  #   return processImage(asset)
+  elif t == 'image':
+    return processImage(asset)
   # elif t == 'tileset':
   #   return processTileset(asset)
   else:

tools/assetstool/processimage.py

@@ -0,0 +1,78 @@
+import os
+import sys
+from PIL import Image
+from processpalette import extractPaletteFromImage, palettes
+from args import args
+from assethelpers import getAssetRelativePath
+
+images = []
+
+def processImage(asset):
+  type = asset['options'].get('type', 'PALETTIZED').upper()
+  if type == 'PALETTIZED':
+    return processPalettizedImage(asset)
+  elif type == 'ALPHA':
+    return processAlphaImage(asset)
+  else:
+    print(f"Error: Unknown image type {type} for asset {asset['path']}")
+    sys.exit(1)
+
+def processPalettizedImage(asset):
+  assetPath = asset['path']
+
+  image = Image.open(assetPath)
+  imagePalette = extractPaletteFromImage(image)
+
+  # Find palette that contains every color
+  for palette in palettes:
+    if all(color in palette['pixels'] for color in imagePalette):
+      break
+  else:
+    print(f"No matching palette found for {assetPath}!")
+    # Find which pixel is missing
+    for color in imagePalette:
+      if color not in palette:
+        print(f"Missing color: {color}")
+    sys.exit(1)
+  
+  print(f"Converting image {assetPath} to use palette")
+  
+  paletteIndexes = []
+  for pixel in list(image.getdata()):
+    if pixel[3] == 0:
+      pixel = (0, 0, 0, 0)
+    paletteIndex = palette['pixels'].index(pixel)
+    paletteIndexes.append(paletteIndex)
+  
+  data = bytearray()
+  data.extend(b"DPI")  # Dusk Palettized Image
+  data.extend(image.width.to_bytes(4, 'little'))   # Width
+  data.extend(image.height.to_bytes(4, 'little'))  # Height
+  data.append(palette['paletteIndex'])   # Palette index
+  for paletteIndex in paletteIndexes:
+    if paletteIndex > 255 or paletteIndex < 0:
+      print(f"Error: Palette index {paletteIndex} exceeds 255!")
+      sys.exit(1)
+    data.append(paletteIndex.to_bytes(1, 'little')[0])  # Pixel index
+
+  relative = getAssetRelativePath(assetPath)
+  fileNameWithoutExt = os.path.splitext(os.path.basename(assetPath))[0]
+  outputFileRelative = os.path.join(os.path.dirname(relative), f"{fileNameWithoutExt}.dpi")
+  outputFilePath = os.path.join(args.output_assets, outputFileRelative)
+  os.makedirs(os.path.dirname(outputFilePath), exist_ok=True)
+  with open(outputFilePath, "wb") as f:
+    f.write(data)
+
+  outImage = {
+    "files": [ outputFilePath ],
+  }
+  return outImage
+
+def processAlphaImage(asset):
+  assetPath = asset['path']
+  print(f"Processing alpha image: {assetPath}")
+
+  outImage = {
+    "files": []
+  }
+  return outImage

tools/assetstool/processpalette.py

@@ -13,7 +13,7 @@ def extractPaletteFromImage(image):
   pixels = list(image.getdata())
   uniqueColors = []
   for color in pixels:
-    # We treat alpha 0 as rgba(0,0,0,0) for palette purposes
+    # We treat all alpha 0 as rgba(0,0,0,0) for palette purposes
     if color[3] == 0:
       color = (0, 0, 0, 0)
     if color not in uniqueColors: