se.llbit.chunky.map

Class MapBuffer

java.lang.Object

se.llbit.chunky.map.MapBuffer

public class MapBuffer
extends java.lang.Object

Keeps a buffered image of rendered map tiles. We only re-render chunks when they are not buffered. The buffer contains all visible chunks, plus some outside of the view. Chunks outside the view are rendered so that the rendering and chunk loading delay when panning is minimized.

Constructor Summary

Constructors

Constructor and Description
MapBuffer()

Method Summary

Modifier and Type	Method and Description
void	clearBuffer() Forces all tiles to be redrawn on the next draw operation.
void	copyPixels(int[] data, int srcPos, int x, int z, int size) Copies a contiguous block of pixels into the buffer.
void	drawBuffered(javafx.scene.canvas.GraphicsContext gc) Draws the current buffered map to a map canvas (via a GraphicsContext).
void	drawTile(WorldMapLoader mapLoader, ChunkPosition chunk) Redraws the given tile.
void	drawTileCached(WorldMapLoader mapLoader, ChunkPosition chunk) Attempts to draw the tile using cached image.
ChunkView	getView()
Block	highlightBlock()
javafx.scene.paint.Color	highlightColor()
boolean	highlightEnabled()
void	redrawView(WorldMapLoader mapLoader) Redraw all tiles in the current view.
void	renderPng(java.io.File targetFile) Write the map to a PNG image.
void	updateView(ChunkView newView, WorldMapLoader loader) Called when this render buffer should buffer another view.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MapBuffer

public MapBuffer()

Method Detail

updateView

public void updateView(ChunkView newView,
                       WorldMapLoader loader)

Called when this render buffer should buffer another view.

getView

public ChunkView getView()

Returns:

The buffered view

drawTile

public void drawTile(WorldMapLoader mapLoader,
                     ChunkPosition chunk)

Redraws the given tile.

drawTileCached

public void drawTileCached(WorldMapLoader mapLoader,
                           ChunkPosition chunk)

Attempts to draw the tile using cached image.

redrawView

public void redrawView(WorldMapLoader mapLoader)

Redraw all tiles in the current view. This draws to the map buffer, it does not render to the map canvas.

copyPixels

public void copyPixels(int[] data,
                       int srcPos,
                       int x,
                       int z,
                       int size)

Copies a contiguous block of pixels into the buffer.

drawBuffered

public void drawBuffered(javafx.scene.canvas.GraphicsContext gc)

Draws the current buffered map to a map canvas (via a GraphicsContext). We use a manual scaling implementation to avoid the blurry JavaFX upscaling.

Drawing the image would be much simpler if we could rely on JavaFX for scaling the image, unfortunately if JavaFX is used to scale the image it will use a blurry upscaling algorithm which looks bad for the 2D map. It is not possible to disable the JavaFX scaling interpolation, so we do our own scaling here instead.

highlightEnabled

public boolean highlightEnabled()

highlightBlock

public Block highlightBlock()

highlightColor

public javafx.scene.paint.Color highlightColor()

clearBuffer

public void clearBuffer()

Forces all tiles to be redrawn on the next draw operation.

renderPng

public void renderPng(java.io.File targetFile)
               throws java.io.IOException

Write the map to a PNG image.

Throws:

java.io.IOException