/*
* Copyright 2013 MovingBlocks
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.terasology.rendering.assets.atlas;
import com.google.common.base.Charsets;
import com.google.common.collect.Maps;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.terasology.asset.AssetLoader;
import org.terasology.asset.Assets;
import org.terasology.math.Rect2f;
import org.terasology.math.Vector2i;
import org.terasology.module.Module;
import org.terasology.naming.Name;
import org.terasology.rendering.assets.texture.subtexture.SubtextureData;
import org.terasology.rendering.assets.texture.Texture;
import org.terasology.utilities.gson.Vector2iTypeAdapter;
import javax.vecmath.Vector2f;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.List;
import java.util.Map;
/**
* @author Immortius
*/
public class AtlasLoader implements AssetLoader<AtlasData> {
private static final Logger logger = LoggerFactory.getLogger(AtlasLoader.class);
private Gson gson;
public AtlasLoader() {
gson = new GsonBuilder().registerTypeAdapter(Vector2i.class, new Vector2iTypeAdapter()).create();
}
@Override
public AtlasData load(Module module, InputStream stream, List<URL> urls, List<URL> deltas) throws IOException {
AtlasDefinition def = gson.fromJson(new InputStreamReader(stream, Charsets.UTF_8), AtlasDefinition.class);
Texture texture = Assets.getTexture(def.getTexture());
if (texture != null) {
Vector2i size = def.getTextureSize();
if (size == null) {
size = new Vector2i(texture.getWidth(), texture.getHeight());
}
Map<Name, SubtextureData> result = Maps.newHashMap();
if (def.getGrid() != null) {
process(def.getGrid(), texture, size, result);
}
if (def.getGrids() != null) {
for (GridDefinition grid : def.getGrids()) {
process(grid, texture, size, result);
}
}
if (def.getSubimage() != null) {
process(def.getSubimage(), texture, size, result);
}
if (def.getSubimages() != null) {
for (FreeformDefinition freeform : def.getSubimages()) {
process(freeform, texture, size, result);
}
}
return new AtlasData(result);
}
return null;
}
private void process(FreeformDefinition freeform, Texture texture, Vector2i size, Map<Name, SubtextureData> out) {
if (freeform.getName() == null || freeform.getName().isEmpty()) {
logger.error("Bad subimage definition - missing mandatory property name");
return;
}
if (freeform.getMin() == null) {
logger.error("Bad subimage definition '{}' - missing mandatory property min", freeform.getName());
return;
}
if (freeform.getSize() == null && freeform.getMax() == null) {
logger.error("Bad subimage definition '{}' - requires one of max or size", freeform.getName());
return;
}
Vector2f min = new Vector2f((float) freeform.getMin().x / size.x, (float) freeform.getMin().y / size.y);
if (freeform.getSize() != null) {
Vector2f itemSize = new Vector2f((float) freeform.getSize().x / size.x, (float) freeform.getSize().y / size.y);
out.put(new Name(freeform.getName()), new SubtextureData(texture, Rect2f.createFromMinAndSize(min, itemSize)));
} else if (freeform.getMax() != null) {
Vector2f max = new Vector2f((float) freeform.getMax().x / size.x, (float) freeform.getMax().y / size.y);
out.put(new Name(freeform.getName()), new SubtextureData(texture, Rect2f.createFromMinAndMax(min, max)));
}
}
private void process(GridDefinition grid, Texture texture, Vector2i size, Map<Name, SubtextureData> out) {
if (grid.getTileSize() == null) {
logger.error("Bad grid definition - missing mandatory property tileSize");
return;
}
if (grid.getGridDimensions() == null) {
logger.error("Bad grid definition - missing mandatory property gridDimensions");
return;
}
Vector2f offset = new Vector2f(0, 0);
if (grid.getGridOffset() != null) {
offset.set((float) grid.getGridOffset().x / size.x, (float) grid.getGridOffset().y / size.y);
}
Vector2f tileSize = new Vector2f((float) grid.getTileSize().x / size.x, (float) grid.getTileSize().y / size.y);
int tileX = 0;
int tileY = 0;
for (String name : grid.getTileNames()) {
if (!name.isEmpty()) {
Vector2f pos = new Vector2f(offset);
pos.x += tileX * tileSize.x;
pos.y += tileY * tileSize.y;
Rect2f tileLocation = Rect2f.createFromMinAndSize(offset.x + tileX * tileSize.x, offset.y + tileY * tileSize.y, tileSize.x, tileSize.y);
out.put(new Name(name), new SubtextureData(texture, tileLocation));
}
tileX++;
if (tileX == grid.getGridDimensions().x) {
tileX = 0;
tileY++;
}
}
}
}