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Funkin/source/funkin/graphics/framebuffer/FrameBufferManager.hx

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package funkin.graphics.framebuffer;
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import flixel.FlxCamera;
import flixel.FlxG;
import flixel.FlxSprite;
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import flixel.util.FlxColor;
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import openfl.display.BitmapData;
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/**
* Manages frame buffers and gives access to each frame buffer.
*/
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class FrameBufferManager
{
final camera:FlxCamera;
final frameBufferMap:Map<String, FrameBuffer> = [];
/**
* Creates a frame buffer manager that targets `camera`.
* @param camera the target camera.
*/
public function new(camera:FlxCamera)
{
this.camera = camera;
}
/**
* Creates a new frame buffer with a name.
* @param name the name
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* @param bgColor the background color
* @return the bitmap data of the frame buffer. the bitmap data instance
* will not be changed through frame buffer updates.
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*/
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public function createFrameBuffer(name:String, bgColor:FlxColor):BitmapData
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{
if (frameBufferMap.exists(name))
{
FlxG.log.warn('frame buffer "$name" already exists');
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frameBufferMap[name].dispose();
frameBufferMap.remove(name);
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}
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final fb = new FrameBuffer();
fb.create(camera.width, camera.height, bgColor);
frameBufferMap[name] = fb;
return fb.bitmap;
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}
/**
* Adds a copy of the sprite to the frame buffer.
* @param name the name of the frame buffer
* @param sprite the sprite
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* @param color if this is not `null`, the sprite will be filled with the color.
* if this is `null`, the sprite will keep its original color.
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*/
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public function addSpriteCopyTo(name:String, sprite:FlxSprite, color:Null<FlxColor> = null):Void
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{
frameBufferMap[name].addSpriteCopy(new SpriteCopy(sprite, color));
}
/**
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* Call this before drawing anything.
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*/
public function lock():Void
{
for (_ => fb in frameBufferMap)
{
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fb.follow(camera);
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fb.lock();
}
}
/**
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* Unlocks the frame buffers. This updates the bitmap data of each frame buffer.
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*/
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public function unlock():Void
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{
for (_ => fb in frameBufferMap)
{
fb.render();
}
for (_ => fb in frameBufferMap)
{
fb.unlock();
}
}
/**
* Returns the bitmap data of the frame buffer
* @param name the name of the frame buffer
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* @return the bitmap data
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*/
public function getFrameBuffer(name:String):BitmapData
{
return frameBufferMap[name].bitmap;
}
/**
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* Disposes all frame buffers. The instance can be reused.
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*/
public function dispose():Void
{
for (_ => fb in frameBufferMap)
{
fb.dispose();
}
frameBufferMap.clear();
}
}