/*******************************************************************************
* Copyright 2014 See AUTHORS file.
*
* 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 com.badlogic.gdx.maps.tiled.renderers;
import static com.badlogic.gdx.graphics.g2d.Batch.*;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteCache;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.maps.MapLayer;
import com.badlogic.gdx.maps.MapLayers;
import com.badlogic.gdx.maps.MapObject;
import com.badlogic.gdx.maps.tiled.TiledMap;
import com.badlogic.gdx.maps.tiled.TiledMapRenderer;
import com.badlogic.gdx.maps.tiled.TiledMapTile;
import com.badlogic.gdx.maps.tiled.TiledMapTileLayer;
import com.badlogic.gdx.maps.tiled.TiledMapTileLayer.Cell;
import com.badlogic.gdx.math.Matrix4;
import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.utils.Disposable;
/** Renders ortho tiles by caching geometry on the GPU. How much is cached is controlled by {@link #setOverCache(float)}. When the
* view reaches the edge of the cached tiles, the cache is rebuilt at the new view position.
* <p>
* This class may have poor performance when tiles are often changed dynamically, since the cache must be rebuilt after each
* change.
* @author Justin Shapcott
* @author Nathan Sweet */
public class OrthoCachedTiledMapRenderer implements TiledMapRenderer, Disposable {
static private final float tolerance = 0.00001f;
protected final TiledMap map;
protected final SpriteCache spriteCache;
protected final float[] vertices = new float[20];
protected boolean blending;
protected float unitScale;
protected final Rectangle viewBounds = new Rectangle();
protected final Rectangle cacheBounds = new Rectangle();
protected float overCache = 0.50f;
protected float maxTileWidth, maxTileHeight;
protected boolean cached;
protected int count;
protected boolean canCacheMoreN, canCacheMoreE, canCacheMoreW, canCacheMoreS;
/** Creates a renderer with a unit scale of 1 and cache size of 2000. */
public OrthoCachedTiledMapRenderer (TiledMap map) {
this(map, 1, 2000);
}
/** Creates a renderer with a cache size of 2000. */
public OrthoCachedTiledMapRenderer (TiledMap map, float unitScale) {
this(map, unitScale, 2000);
}
/** @param cacheSize The maximum number of tiles that can be cached. */
public OrthoCachedTiledMapRenderer (TiledMap map, float unitScale, int cacheSize) {
this.map = map;
this.unitScale = unitScale;
spriteCache = new SpriteCache(cacheSize, true);
}
@Override
public void setView (OrthographicCamera camera) {
spriteCache.setProjectionMatrix(camera.combined);
float width = camera.viewportWidth * camera.zoom + maxTileWidth * 2 * unitScale;
float height = camera.viewportHeight * camera.zoom + maxTileHeight * 2 * unitScale;
viewBounds.set(camera.position.x - width / 2, camera.position.y - height / 2, width, height);
if ((canCacheMoreW && viewBounds.x < cacheBounds.x - tolerance) || //
(canCacheMoreS && viewBounds.y < cacheBounds.y - tolerance) || //
(canCacheMoreE && viewBounds.x + viewBounds.width > cacheBounds.x + cacheBounds.width + tolerance) || //
(canCacheMoreN && viewBounds.y + viewBounds.height > cacheBounds.y + cacheBounds.height + tolerance) //
) cached = false;
}
@Override
public void setView (Matrix4 projection, float x, float y, float width, float height) {
spriteCache.setProjectionMatrix(projection);
x -= maxTileWidth * unitScale;
y -= maxTileHeight * unitScale;
width += maxTileWidth * 2 * unitScale;
height += maxTileHeight * 2 * unitScale;
viewBounds.set(x, y, width, height);
if ((canCacheMoreW && viewBounds.x < cacheBounds.x - tolerance) || //
(canCacheMoreS && viewBounds.y < cacheBounds.y - tolerance) || //
(canCacheMoreE && viewBounds.x + viewBounds.width > cacheBounds.x + cacheBounds.width + tolerance) || //
(canCacheMoreN && viewBounds.y + viewBounds.height > cacheBounds.y + cacheBounds.height + tolerance) //
) cached = false;
}
@Override
public void render () {
if (!cached) {
cached = true;
count = 0;
spriteCache.clear();
final float extraWidth = viewBounds.width * overCache;
final float extraHeight = viewBounds.height * overCache;
cacheBounds.x = viewBounds.x - extraWidth;
cacheBounds.y = viewBounds.y - extraHeight;
cacheBounds.width = viewBounds.width + extraWidth * 2;
cacheBounds.height = viewBounds.height + extraHeight * 2;
for (MapLayer layer : map.getLayers()) {
spriteCache.beginCache();
if (layer instanceof TiledMapTileLayer) {
renderTileLayer((TiledMapTileLayer)layer);
}
spriteCache.endCache();
}
}
if (blending) {
Gdx.gl.glEnable(GL20.GL_BLEND);
Gdx.gl.glBlendFunc(GL20.GL_SRC_ALPHA, GL20.GL_ONE_MINUS_SRC_ALPHA);
}
spriteCache.begin();
MapLayers mapLayers = map.getLayers();
for (int i = 0, j = mapLayers.getCount(); i < j; i++) {
MapLayer layer = mapLayers.get(i);
if (layer.isVisible()) {
spriteCache.draw(i);
for (MapObject object : layer.getObjects()) {
renderObject(object);
}
}
}
spriteCache.end();
if (blending) Gdx.gl.glDisable(GL20.GL_BLEND);
}
@Override
public void render (int[] layers) {
if (!cached) {
cached = true;
count = 0;
spriteCache.clear();
final float extraWidth = viewBounds.width * overCache;
final float extraHeight = viewBounds.height * overCache;
cacheBounds.x = viewBounds.x - extraWidth;
cacheBounds.y = viewBounds.y - extraHeight;
cacheBounds.width = viewBounds.width + extraWidth * 2;
cacheBounds.height = viewBounds.height + extraHeight * 2;
for (MapLayer layer : map.getLayers()) {
spriteCache.beginCache();
if (layer instanceof TiledMapTileLayer) {
renderTileLayer((TiledMapTileLayer)layer);
}
spriteCache.endCache();
}
}
if (blending) {
Gdx.gl.glEnable(GL20.GL_BLEND);
Gdx.gl.glBlendFunc(GL20.GL_SRC_ALPHA, GL20.GL_ONE_MINUS_SRC_ALPHA);
}
spriteCache.begin();
MapLayers mapLayers = map.getLayers();
for (int i : layers) {
MapLayer layer = mapLayers.get(i);
if (layer.isVisible()) {
spriteCache.draw(i);
for (MapObject object : layer.getObjects()) {
renderObject(object);
}
}
}
spriteCache.end();
if (blending) Gdx.gl.glDisable(GL20.GL_BLEND);
}
@Override
public void renderObject (MapObject object) {
}
@Override
public void renderTileLayer (TiledMapTileLayer layer) {
final float color = Color.toFloatBits(1, 1, 1, layer.getOpacity());
final int layerWidth = layer.getWidth();
final int layerHeight = layer.getHeight();
final float layerTileWidth = layer.getTileWidth() * unitScale;
final float layerTileHeight = layer.getTileHeight() * unitScale;
final int col1 = Math.max(0, (int)(cacheBounds.x / layerTileWidth));
final int col2 = Math.min(layerWidth, (int)((cacheBounds.x + cacheBounds.width + layerTileWidth) / layerTileWidth));
final int row1 = Math.max(0, (int)(cacheBounds.y / layerTileHeight));
final int row2 = Math.min(layerHeight, (int)((cacheBounds.y + cacheBounds.height + layerTileHeight) / layerTileHeight));
canCacheMoreN = row2 < layerHeight;
canCacheMoreE = col2 < layerWidth;
canCacheMoreW = col1 > 0;
canCacheMoreS = row1 > 0;
float[] vertices = this.vertices;
for (int row = row2; row >= row1; row--) {
for (int col = col1; col < col2; col++) {
final TiledMapTileLayer.Cell cell = layer.getCell(col, row);
if (cell == null) continue;
final TiledMapTile tile = cell.getTile();
if (tile == null) continue;
count++;
final boolean flipX = cell.getFlipHorizontally();
final boolean flipY = cell.getFlipVertically();
final int rotations = cell.getRotation();
final TextureRegion region = tile.getTextureRegion();
final Texture texture = region.getTexture();
final float x1 = col * layerTileWidth + tile.getOffsetX() * unitScale;
final float y1 = row * layerTileHeight + tile.getOffsetY() * unitScale;
final float x2 = x1 + region.getRegionWidth() * unitScale;
final float y2 = y1 + region.getRegionHeight() * unitScale;
final float adjustX = 0.5f / texture.getWidth();
final float adjustY = 0.5f / texture.getHeight();
final float u1 = region.getU() + adjustX;
final float v1 = region.getV2() - adjustY;
final float u2 = region.getU2() - adjustX;
final float v2 = region.getV() + adjustY;
vertices[X1] = x1;
vertices[Y1] = y1;
vertices[C1] = color;
vertices[U1] = u1;
vertices[V1] = v1;
vertices[X2] = x1;
vertices[Y2] = y2;
vertices[C2] = color;
vertices[U2] = u1;
vertices[V2] = v2;
vertices[X3] = x2;
vertices[Y3] = y2;
vertices[C3] = color;
vertices[U3] = u2;
vertices[V3] = v2;
vertices[X4] = x2;
vertices[Y4] = y1;
vertices[C4] = color;
vertices[U4] = u2;
vertices[V4] = v1;
if (flipX) {
float temp = vertices[U1];
vertices[U1] = vertices[U3];
vertices[U3] = temp;
temp = vertices[U2];
vertices[U2] = vertices[U4];
vertices[U4] = temp;
}
if (flipY) {
float temp = vertices[V1];
vertices[V1] = vertices[V3];
vertices[V3] = temp;
temp = vertices[V2];
vertices[V2] = vertices[V4];
vertices[V4] = temp;
}
if (rotations != 0) {
switch (rotations) {
case Cell.ROTATE_90: {
float tempV = vertices[V1];
vertices[V1] = vertices[V2];
vertices[V2] = vertices[V3];
vertices[V3] = vertices[V4];
vertices[V4] = tempV;
float tempU = vertices[U1];
vertices[U1] = vertices[U2];
vertices[U2] = vertices[U3];
vertices[U3] = vertices[U4];
vertices[U4] = tempU;
break;
}
case Cell.ROTATE_180: {
float tempU = vertices[U1];
vertices[U1] = vertices[U3];
vertices[U3] = tempU;
tempU = vertices[U2];
vertices[U2] = vertices[U4];
vertices[U4] = tempU;
float tempV = vertices[V1];
vertices[V1] = vertices[V3];
vertices[V3] = tempV;
tempV = vertices[V2];
vertices[V2] = vertices[V4];
vertices[V4] = tempV;
break;
}
case Cell.ROTATE_270: {
float tempV = vertices[V1];
vertices[V1] = vertices[V4];
vertices[V4] = vertices[V3];
vertices[V3] = vertices[V2];
vertices[V2] = tempV;
float tempU = vertices[U1];
vertices[U1] = vertices[U4];
vertices[U4] = vertices[U3];
vertices[U3] = vertices[U2];
vertices[U2] = tempU;
break;
}
}
}
spriteCache.add(texture, vertices, 0, 20);
}
}
}
/** Causes the cache to be rebuilt the next time it is rendered. */
public void invalidateCache () {
cached = false;
}
/** Returns true if tiles are currently cached. */
public boolean isCached () {
return cached;
}
/** Sets the percentage of the view that is cached in each direction. Default is 0.5.
* <p>
* Eg, 0.75 will cache 75% of the width of the view to the left and right of the view, and 75% of the height of the view above
* and below the view. */
public void setOverCache (float overCache) {
this.overCache = overCache;
}
/** Expands the view size in each direction, ensuring that tiles of this size or smaller are never culled from the visible
* portion of the view. Default is 0,0.
* <p>
* The amount of tiles cached is computed using <code>(view size + max tile size) * overCache</code>, meaning the max tile size
* increases the amount cached and possibly {@link #setOverCache(float)} can be reduced.
* <p>
* If the view size and {@link #setOverCache(float)} are configured so the size of the cached tiles is always larger than the
* largest tile size, this setting is not needed. */
public void setMaxTileSize (float maxPixelWidth, float maxPixelHeight) {
this.maxTileWidth = maxPixelWidth;
this.maxTileHeight = maxPixelHeight;
}
public void setBlending (boolean blending) {
this.blending = blending;
}
public SpriteCache getSpriteCache () {
return spriteCache;
}
@Override
public void dispose () {
spriteCache.dispose();
}
}