src/main/java/li/cil/oc/api/component/TextBuffer.java - minecraft/opencomputers - Rivoreo Source Code Repositories

 package li.cil.oc.api.component;

 import cpw.mods.fml.relauncher.Side;
 import cpw.mods.fml.relauncher.SideOnly;
 import li.cil.oc.api.Persistable;
 import li.cil.oc.api.network.ManagedEnvironment;
 import net.minecraft.entity.player.EntityPlayer;

 /**
  * This interface implements functionality for displaying and manipulating
  * text, like screens and robots. An implementation can be obtained via the
  * screens' item driver.
  * <p/>
  * This allows re-using the built-in screen logic in third-party code without
  * access to the internals of OC.
  * <p/>
  * To get an instance of the buffer component, use its item driver, e.g.:
  * <pre>
  *     final ItemStack stack = li.cil.oc.api.Items.get("screen1").createItemStack(1);
  *     final TextBuffer buffer = (TextBuffer) li.cil.oc.api.Driver.driverFor(stack).createEnvironment(stack, this);
  * </pre>
  */
 public interface TextBuffer extends ManagedEnvironment, Persistable {
     /**
      * Controls how much energy the buffer will consume per tick.
      * <p/>
      * This is <em>not</em> necessarily the actual amount consumed per tick,
      * instead it is a base value that cost is based on, incorporating a few
      * other factors. This is the cost a tier one screen will consume if every
      * character is lit (non-black). Larger buffers (i.e. buffers with a higher
      * maximum resolution) cost proportionally more.
      * <p/>
      * Note that this amount of energy is not necessarily subtracted each tick,
      * instead every n ticks, n times the amount of energy it costs to run the
      * buffer will be consumed, where n is configurable in the OC config.
      * <p/>
      * This defaults to OC's built-in default value.
      *
      * @param value the base energy cost per tick.
      * @see #getEnergyCostPerTick()
      */
     void setEnergyCostPerTick(double value);

     /**
      * Get the energy cost per tick.
      *
      * @return the base energy cost per tick.
      * @see #setEnergyCostPerTick(double)
      */
     double getEnergyCostPerTick();

     /**
      * Set whether the buffer is powered on.
      * <p/>
      * For example, screens can be powered on and off by sending a redstone
      * pulse into them, in addition to their component API.
      *
      * @param value whether the buffer should be on or not.
      * @see #getPowerState()
      */
     void setPowerState(boolean value);

     /**
      * Get the current power state.
      *
      * @return whether the buffer is powered on.
      * @see #setPowerState(boolean)
      */
     boolean getPowerState();

     /**
      * Sets the maximum resolution supported by this buffer.
      *
      * @param width  the maximum horizontal resolution, in characters.
      * @param height the maximum vertical resolution, in characters.
      */
     void setMaximumResolution(int width, int height);

     /**
      * Get the maximum horizontal size of the buffer.
      */
     int getMaximumWidth();

     /**
      * Get the maximum vertical size of the buffer.
      */
     int getMaximumHeight();

     /**
      * Set the 'aspect ratio' of the buffer.
      * <p/>
      * Not to be confused with the maximum resolution of the buffer, this
      * refers to the 'physical' size of the buffer's container. For multi-
      * block screens, for example, this is the number of horizontal and
      * vertical blocks.
      *
      * @param width  the horizontal size of the physical representation.
      * @param height the vertical size of the physical representation.
      */
     void setAspectRatio(double width, double height);

     /**
      * Get the aspect ratio of the buffer.
      * <p/>
      * Note that this is in fact <tt>width / height</tt>.
      *
      * @see #setAspectRatio(double, double)
      */
     double getAspectRatio();

     /**
      * Set the buffer's active resolution.
      *
      * @param width  the horizontal resolution.
      * @param height the vertical resolution.
      * @return <tt>true</tt> if the resolution changed.
      */
     boolean setResolution(int width, int height);

     /**
      * Get the current horizontal resolution.
      *
      * @see #setResolution(int, int)
      */
     int getWidth();

     /**
      * Get the current vertical resolution.
      *
      * @see #setResolution(int, int)
      */
     int getHeight();

     /**
      * Sets the maximum color depth supported by this buffer.
      * <p/>
      * Note that this is the <em>maximum</em> supported depth, lower depths
      * will be supported, too. So when setting this to four bit, one bit will
      * be supported, too. When setting this to eight bit, four and one bit
      * will be supported, also.
      *
      * @param depth the maximum color depth of the buffer.
      */
     void setMaximumColorDepth(ColorDepth depth);

     /**
      * Get the maximum color depth supported.
      */
     ColorDepth getMaximumColorDepth();

     /**
      * Set the active color depth for this buffer.
      *
      * @param depth the new color depth.
      * @return <tt>true</tt> if the color depth changed.
      */
     boolean setColorDepth(ColorDepth depth);

     /**
      * Get the active color depth of this buffer.
      */
     ColorDepth getColorDepth();

     /**
      * Set the color of the active color palette at the specified index.
      * <p/>
      * This will error if the current depth does not have a palette (one bit).
      *
      * @param index the index at which to set the color.
      * @param color the color to set for the specified index.
      */
     void setPaletteColor(int index, int color);

     /**
      * Get the color in the active color palette at the specified index.
      * <p/>
      * This will error if the current depth does not have a palette (one bit).
      *
      * @param index the index at which to get the color.
      * @return the color in the active palette at the specified index.
      */
     int getPaletteColor(int index);

     /**
      * Set the active foreground color, not using a palette.
      *
      * @param color the new foreground color.
      * @see #setForegroundColor(int, boolean)
      */
     void setForegroundColor(int color);

     /**
      * Set the active foreground color.
      * <p/>
      * If the value is not from the palette, the actually stored value may
      * differ from the specified one, as it is converted to the buffer's
      * current color depth.
      * <p/>
      * For palette-only color formats (four bit) the best fit from the palette
      * is chosen, if the value is not from the palette.
      *
      * @param color         the color or palette index.
      * @param isFromPalette <tt>true</tt>if <tt>color</tt> specifies a palette index.
      */
     void setForegroundColor(int color, boolean isFromPalette);

     /**
      * The active foreground color.
      */
     int getForegroundColor();

     /**
      * <tt>true</tt> if the foreground color is from the color palette, meaning
      * the value returned from {@link #getForegroundColor()} is the color
      * palette index.
      */
     boolean isForegroundFromPalette();

     /**
      * Set the active background color, not using a palette.
      *
      * @param color the new background color.
      * @see #setBackgroundColor(int, boolean)
      */
     void setBackgroundColor(int color);

     /**
      * Set the active background color.
      * <p/>
      * If the value is not from the palette, the actually stored value may
      * differ from the specified one, as it is converted to the buffer's
      * current color depth.
      * <p/>
      * For palette-only color formats (four bit) the best fit from the palette
      * is chosen, if the value is not from the palette.
      *
      * @param color         the color or palette index.
      * @param isFromPalette <tt>true</tt>if <tt>color</tt> specifies a palette index.
      */
     void setBackgroundColor(int color, boolean isFromPalette);

     /**
      * The active background color.
      */
     int getBackgroundColor();

     /**
      * <tt>true</tt> if the background color is from the color palette, meaning
      * the value returned from {@link #getBackgroundColor()} is the color
      * palette index.
      */
     boolean isBackgroundFromPalette();

     /**
      * Copy a portion of the text buffer.
      * <p/>
      * This will copy the area's text and colors.
      *
      * @param column                the starting horizontal index of the area to copy.
      * @param row                   the starting vertical index of the area to copy.
      * @param width                 the width of the area to copy.
      * @param height                the height of the area to copy.
      * @param horizontalTranslation the horizontal offset, relative to the starting column to copy the are to.
      * @param verticalTranslation   the vertical offset, relative to the starting row to copy the are to.
      */
     void copy(int column, int row, int width, int height, int horizontalTranslation, int verticalTranslation);

     /**
      * Fill a portion of the text buffer.
      * <p/>
      * This will set the area's colors to the currently active ones.
      *
      * @param column the starting horizontal index of the area to fill.
      * @param row    the starting vertical index of the area to fill.
      * @param width  the width of the area to fill.
      * @param height the height of the area to fill.
      * @param value  the character to fill the area with.
      */
     void fill(int column, int row, int width, int height, char value);

     /**
      * Write a string into the text buffer.
      * <p/>
      * This will apply the currently active colors to the changed area.
      *
      * @param column   the starting horizontal index to write at.
      * @param row      the starting vertical index to write at.
      * @param value    the string to write.
      * @param vertical <tt>true</tt> if the string should be written vertically instead of horizontally.
      */
     void set(int column, int row, String value, boolean vertical);

     /**
      * Get the character in the text buffer at the specified location.
      *
      * @param column the horizontal index.
      * @param row    the vertical index.
      * @return the character at that index.
      */
     char get(int column, int row);

     /**
      * Get the character in the text buffer at the specified location.
      *
      * @param column the horizontal index.
      * @param row    the vertical index.
      * @return the foregound color at that index.
      */
     int getForegroundColor(int column, int row);

     /**
      * Whether the foreground color of the text buffer at the specified
      * location if from the color palette.
      *
      * @param column the horizontal index.
      * @param row    the vertical index.
      * @return whether the foreground at that index is from the palette.
      */
     boolean isForegroundFromPalette(int column, int row);

     /**
      * Get the background color of the text buffer at the specified location.
      *
      * @param column the horizontal index.
      * @param row    the vertical index.
      * @return the background color at that index.
      */
     int getBackgroundColor(int column, int row);

     /**
      * Whether the background color of the text buffer at the specified
      * location if from the color palette.
      *
      * @param column the horizontal index.
      * @param row    the vertical index.
      * @return whether the background at that index is from the palette.
      */
     boolean isBackgroundFromPalette(int column, int row);

     // ----------------------------------------------------------------------- //

     /**
      * Renders the <em>text</em> displayed on the buffer.
      * <p/>
      * You are responsible for setting up the actual context and applying any
      * transformations necessary to properly position and scale the text before
      * calling this. The text should be rendered on a black background.
      * <p/>
      * You can use this to either render the text in a GUI or in the world.
      *
      * @return <tt>true</tt> if the displayed content changed since the last
      * call to this method.
      */
     @SideOnly(Side.CLIENT)
     boolean renderText();

     /**
      * The natural width of the rendered text.
      * <p/>
      * This is the width of the complete text buffer, in pixels. In other
      * words, this is the width of the buffer in chars times the actual width
      * of a single char in pixels.
      *
      * @return the total width of the rendered buffer, in pixels.
      */
     @SideOnly(Side.CLIENT)
     int renderWidth();

     /**
      * The natural height of the rendered text.
      * <p/>
      * This is the height of the complete text buffer, in pixels. In other
      * words, this is the height of the buffer in chars times the actual height
      * of a single char in pixels.
      *
      * @return the total height of the rendered buffer, in pixels.
      */
     @SideOnly(Side.CLIENT)
     int renderHeight();

     /**
      * Set whether the contents of the buffer should currently be rendered.
      * <p/>
      * Note that this is automatically overwritten when the buffer's power
      * state changes, i.e. when it runs out of power or gets back power.
      *
      * @param enabled whether the text buffer should be rendered.
      */
     @SideOnly(Side.CLIENT)
     void setRenderingEnabled(boolean enabled);

     /**
      * Gets whether the contents of the buffer should currently be rendered.
      *
      * @see #setRenderingEnabled(boolean)
      */
     @SideOnly(Side.CLIENT)
     boolean isRenderingEnabled();

     // ----------------------------------------------------------------------- //

     /**
      * Signals a key down event for the buffer.
      * <p/>
      * On the client side this causes a packet to be sent to the server. On the
      * server side this will trigger a message that will be picked up by
      * keyboards, which will then cause a signal in attached machines.
      *
      * @param character the character of the pressed key.
      * @param code      the key code of the pressed key.
      * @param player    the player that pressed the key. Pass <tt>null</tt> on the client side.
      */
     void keyDown(char character, int code, EntityPlayer player);

     /**
      * Signals a key up event for the buffer.
      * <p/>
      * On the client side this causes a packet to be sent to the server. On the
      * server side this will trigger a message that will be picked up by
      * keyboards, which will then cause a signal in attached machines.
      *
      * @param character the character of the released key.
      * @param code      the key code of the released key.
      * @param player    the player that released the key. Pass <tt>null</tt> on the client side.
      */
     void keyUp(char character, int code, EntityPlayer player);

     /**
      * Signals a clipboard paste event for the buffer.
      * <p/>
      * On the client side this causes a packet to be sent to the server. On the
      * server side this will trigger a message that will be picked up by
      * keyboards, which will then cause a signal in attached machines.
      *
      * @param value  the text that was pasted.
      * @param player the player that pasted the text. Pass <tt>null</tt> on the client side.
      */
     void clipboard(String value, EntityPlayer player);

     /**
      * Signals a mouse button down event for the buffer.
      * <p/>
      * On the client side this causes a packet to be sent to the server. On the
      * server side this will cause a signal in attached machines.
      *
      * @param x      the horizontal coordinate of the mouse, in characters.
      * @param y      the vertical coordinate of the mouse, in characters.
      * @param button the button of the mouse that was pressed.
      * @param player the player that pressed the mouse button. Pass <tt>null</tt> on the client side.
      */
     void mouseDown(int x, int y, int button, EntityPlayer player);

     /**
      * Signals a mouse drag event for the buffer.
      * <p/>
      * On the client side this causes a packet to be sent to the server. On the
      * server side this will cause a signal in attached machines.
      *
      * @param x      the horizontal coordinate of the mouse, in characters.
      * @param y      the vertical coordinate of the mouse, in characters.
      * @param button the button of the mouse that is pressed.
      * @param player the player that moved the mouse. Pass <tt>null</tt> on the client side.
      */
     void mouseDrag(int x, int y, int button, EntityPlayer player);

     /**
      * Signals a mouse button release event for the buffer.
      * <p/>
      * On the client side this causes a packet to be sent to the server. On the
      * server side this will cause a signal in attached machines.
      *
      * @param x      the horizontal coordinate of the mouse, in characters.
      * @param y      the vertical coordinate of the mouse, in characters.
      * @param button the button of the mouse that was released.
      * @param player the player that released the mouse button. Pass <tt>null</tt> on the client side.
      */
     void mouseUp(int x, int y, int button, EntityPlayer player);

     /**
      * Signals a mouse wheel scroll event for the buffer.
      * <p/>
      * On the client side this causes a packet to be sent to the server. On the
      * server side this will cause a signal in attached machines.
      *
      * @param x      the horizontal coordinate of the mouse, in characters.
      * @param y      the vertical coordinate of the mouse, in characters.
      * @param delta  indicates the direction of the mouse scroll.
      * @param player the player that scrolled the mouse wheel. Pass <tt>null</tt> on the client side.
      */
     void mouseScroll(int x, int y, int delta, EntityPlayer player);

     // ----------------------------------------------------------------------- //

     /**
      * Used when setting a buffer's maximum color depth.
      */
     public static enum ColorDepth {
         /**
          * Monochrome color, black and white.
          */
         OneBit,

         /**
          * 16 color palette, defaults to Minecraft colors.
          */
         FourBit,

         /**
          * 240 colors, 16 color palette, defaults to grayscale.
          */
         EightBit
     }
 }
	package li.cil.oc.api.component;

	import cpw.mods.fml.relauncher.Side;
	import cpw.mods.fml.relauncher.SideOnly;
	import li.cil.oc.api.Persistable;
	import li.cil.oc.api.network.ManagedEnvironment;
	import net.minecraft.entity.player.EntityPlayer;

	/**
	* This interface implements functionality for displaying and manipulating
	* text, like screens and robots. An implementation can be obtained via the
	* screens' item driver.
	* <p/>
	* This allows re-using the built-in screen logic in third-party code without
	* access to the internals of OC.
	* <p/>
	* To get an instance of the buffer component, use its item driver, e.g.:
	* <pre>
	* final ItemStack stack = li.cil.oc.api.Items.get("screen1").createItemStack(1);
	* final TextBuffer buffer = (TextBuffer) li.cil.oc.api.Driver.driverFor(stack).createEnvironment(stack, this);
	* </pre>
	*/
	public interface TextBuffer extends ManagedEnvironment, Persistable {
	/**
	* Controls how much energy the buffer will consume per tick.
	* <p/>
	* This is <em>not</em> necessarily the actual amount consumed per tick,
	* instead it is a base value that cost is based on, incorporating a few
	* other factors. This is the cost a tier one screen will consume if every
	* character is lit (non-black). Larger buffers (i.e. buffers with a higher
	* maximum resolution) cost proportionally more.
	* <p/>
	* Note that this amount of energy is not necessarily subtracted each tick,
	* instead every n ticks, n times the amount of energy it costs to run the
	* buffer will be consumed, where n is configurable in the OC config.
	* <p/>
	* This defaults to OC's built-in default value.
	*
	* @param value the base energy cost per tick.
	* @see #getEnergyCostPerTick()
	*/
	void setEnergyCostPerTick(double value);

	/**
	* Get the energy cost per tick.
	*
	* @return the base energy cost per tick.
	* @see #setEnergyCostPerTick(double)
	*/
	double getEnergyCostPerTick();

	/**
	* Set whether the buffer is powered on.
	* <p/>
	* For example, screens can be powered on and off by sending a redstone
	* pulse into them, in addition to their component API.
	*
	* @param value whether the buffer should be on or not.
	* @see #getPowerState()
	*/
	void setPowerState(boolean value);

	/**
	* Get the current power state.
	*
	* @return whether the buffer is powered on.
	* @see #setPowerState(boolean)
	*/
	boolean getPowerState();

	/**
	* Sets the maximum resolution supported by this buffer.
	*
	* @param width the maximum horizontal resolution, in characters.
	* @param height the maximum vertical resolution, in characters.
	*/
	void setMaximumResolution(int width, int height);

	/**
	* Get the maximum horizontal size of the buffer.
	*/
	int getMaximumWidth();

	/**
	* Get the maximum vertical size of the buffer.
	*/
	int getMaximumHeight();

	/**
	* Set the 'aspect ratio' of the buffer.
	* <p/>
	* Not to be confused with the maximum resolution of the buffer, this
	* refers to the 'physical' size of the buffer's container. For multi-
	* block screens, for example, this is the number of horizontal and
	* vertical blocks.
	*
	* @param width the horizontal size of the physical representation.
	* @param height the vertical size of the physical representation.
	*/
	void setAspectRatio(double width, double height);

	/**
	* Get the aspect ratio of the buffer.
	* <p/>
	* Note that this is in fact <tt>width / height</tt>.
	*
	* @see #setAspectRatio(double, double)
	*/
	double getAspectRatio();

	/**
	* Set the buffer's active resolution.
	*
	* @param width the horizontal resolution.
	* @param height the vertical resolution.
	* @return <tt>true</tt> if the resolution changed.
	*/
	boolean setResolution(int width, int height);

	/**
	* Get the current horizontal resolution.
	*
	* @see #setResolution(int, int)
	*/
	int getWidth();

	/**
	* Get the current vertical resolution.
	*
	* @see #setResolution(int, int)
	*/
	int getHeight();

	/**
	* Sets the maximum color depth supported by this buffer.
	* <p/>
	* Note that this is the <em>maximum</em> supported depth, lower depths
	* will be supported, too. So when setting this to four bit, one bit will
	* be supported, too. When setting this to eight bit, four and one bit
	* will be supported, also.
	*
	* @param depth the maximum color depth of the buffer.
	*/
	void setMaximumColorDepth(ColorDepth depth);

	/**
	* Get the maximum color depth supported.
	*/
	ColorDepth getMaximumColorDepth();

	/**
	* Set the active color depth for this buffer.
	*
	* @param depth the new color depth.
	* @return <tt>true</tt> if the color depth changed.
	*/
	boolean setColorDepth(ColorDepth depth);

	/**
	* Get the active color depth of this buffer.
	*/
	ColorDepth getColorDepth();

	/**
	* Set the color of the active color palette at the specified index.
	* <p/>
	* This will error if the current depth does not have a palette (one bit).
	*
	* @param index the index at which to set the color.
	* @param color the color to set for the specified index.
	*/
	void setPaletteColor(int index, int color);

	/**
	* Get the color in the active color palette at the specified index.
	* <p/>
	* This will error if the current depth does not have a palette (one bit).
	*
	* @param index the index at which to get the color.
	* @return the color in the active palette at the specified index.
	*/
	int getPaletteColor(int index);

	/**
	* Set the active foreground color, not using a palette.
	*
	* @param color the new foreground color.
	* @see #setForegroundColor(int, boolean)
	*/
	void setForegroundColor(int color);

	/**
	* Set the active foreground color.
	* <p/>
	* If the value is not from the palette, the actually stored value may
	* differ from the specified one, as it is converted to the buffer's
	* current color depth.
	* <p/>
	* For palette-only color formats (four bit) the best fit from the palette
	* is chosen, if the value is not from the palette.
	*
	* @param color the color or palette index.
	* @param isFromPalette <tt>true</tt>if <tt>color</tt> specifies a palette index.
	*/
	void setForegroundColor(int color, boolean isFromPalette);

	/**
	* The active foreground color.
	*/
	int getForegroundColor();

	/**
	* <tt>true</tt> if the foreground color is from the color palette, meaning
	* the value returned from {@link #getForegroundColor()} is the color
	* palette index.
	*/
	boolean isForegroundFromPalette();

	/**
	* Set the active background color, not using a palette.
	*
	* @param color the new background color.
	* @see #setBackgroundColor(int, boolean)
	*/
	void setBackgroundColor(int color);

	/**
	* Set the active background color.
	* <p/>
	* If the value is not from the palette, the actually stored value may
	* differ from the specified one, as it is converted to the buffer's
	* current color depth.
	* <p/>
	* For palette-only color formats (four bit) the best fit from the palette
	* is chosen, if the value is not from the palette.
	*
	* @param color the color or palette index.
	* @param isFromPalette <tt>true</tt>if <tt>color</tt> specifies a palette index.
	*/
	void setBackgroundColor(int color, boolean isFromPalette);

	/**
	* The active background color.
	*/
	int getBackgroundColor();

	/**
	* <tt>true</tt> if the background color is from the color palette, meaning
	* the value returned from {@link #getBackgroundColor()} is the color
	* palette index.
	*/
	boolean isBackgroundFromPalette();

	/**
	* Copy a portion of the text buffer.
	* <p/>
	* This will copy the area's text and colors.
	*
	* @param column the starting horizontal index of the area to copy.
	* @param row the starting vertical index of the area to copy.
	* @param width the width of the area to copy.
	* @param height the height of the area to copy.
	* @param horizontalTranslation the horizontal offset, relative to the starting column to copy the are to.
	* @param verticalTranslation the vertical offset, relative to the starting row to copy the are to.
	*/
	void copy(int column, int row, int width, int height, int horizontalTranslation, int verticalTranslation);

	/**
	* Fill a portion of the text buffer.
	* <p/>
	* This will set the area's colors to the currently active ones.
	*
	* @param column the starting horizontal index of the area to fill.
	* @param row the starting vertical index of the area to fill.
	* @param width the width of the area to fill.
	* @param height the height of the area to fill.
	* @param value the character to fill the area with.
	*/
	void fill(int column, int row, int width, int height, char value);

	/**
	* Write a string into the text buffer.
	* <p/>
	* This will apply the currently active colors to the changed area.
	*
	* @param column the starting horizontal index to write at.
	* @param row the starting vertical index to write at.
	* @param value the string to write.
	* @param vertical <tt>true</tt> if the string should be written vertically instead of horizontally.
	*/
	void set(int column, int row, String value, boolean vertical);

	/**
	* Get the character in the text buffer at the specified location.
	*
	* @param column the horizontal index.
	* @param row the vertical index.
	* @return the character at that index.
	*/
	char get(int column, int row);

	/**
	* Get the character in the text buffer at the specified location.
	*
	* @param column the horizontal index.
	* @param row the vertical index.
	* @return the foregound color at that index.
	*/
	int getForegroundColor(int column, int row);

	/**
	* Whether the foreground color of the text buffer at the specified
	* location if from the color palette.
	*
	* @param column the horizontal index.
	* @param row the vertical index.
	* @return whether the foreground at that index is from the palette.
	*/
	boolean isForegroundFromPalette(int column, int row);

	/**
	* Get the background color of the text buffer at the specified location.
	*
	* @param column the horizontal index.
	* @param row the vertical index.
	* @return the background color at that index.
	*/
	int getBackgroundColor(int column, int row);

	/**
	* Whether the background color of the text buffer at the specified
	* location if from the color palette.
	*
	* @param column the horizontal index.
	* @param row the vertical index.
	* @return whether the background at that index is from the palette.
	*/
	boolean isBackgroundFromPalette(int column, int row);

	// ----------------------------------------------------------------------- //

	/**
	* Renders the <em>text</em> displayed on the buffer.
	* <p/>
	* You are responsible for setting up the actual context and applying any
	* transformations necessary to properly position and scale the text before
	* calling this. The text should be rendered on a black background.
	* <p/>
	* You can use this to either render the text in a GUI or in the world.
	*
	* @return <tt>true</tt> if the displayed content changed since the last
	* call to this method.
	*/
	@SideOnly(Side.CLIENT)
	boolean renderText();

	/**
	* The natural width of the rendered text.
	* <p/>
	* This is the width of the complete text buffer, in pixels. In other
	* words, this is the width of the buffer in chars times the actual width
	* of a single char in pixels.
	*
	* @return the total width of the rendered buffer, in pixels.
	*/
	@SideOnly(Side.CLIENT)
	int renderWidth();

	/**
	* The natural height of the rendered text.
	* <p/>
	* This is the height of the complete text buffer, in pixels. In other
	* words, this is the height of the buffer in chars times the actual height
	* of a single char in pixels.
	*
	* @return the total height of the rendered buffer, in pixels.
	*/
	@SideOnly(Side.CLIENT)
	int renderHeight();

	/**
	* Set whether the contents of the buffer should currently be rendered.
	* <p/>
	* Note that this is automatically overwritten when the buffer's power
	* state changes, i.e. when it runs out of power or gets back power.
	*
	* @param enabled whether the text buffer should be rendered.
	*/
	@SideOnly(Side.CLIENT)
	void setRenderingEnabled(boolean enabled);

	/**
	* Gets whether the contents of the buffer should currently be rendered.
	*
	* @see #setRenderingEnabled(boolean)
	*/
	@SideOnly(Side.CLIENT)
	boolean isRenderingEnabled();

	// ----------------------------------------------------------------------- //

	/**
	* Signals a key down event for the buffer.
	* <p/>
	* On the client side this causes a packet to be sent to the server. On the
	* server side this will trigger a message that will be picked up by
	* keyboards, which will then cause a signal in attached machines.
	*
	* @param character the character of the pressed key.
	* @param code the key code of the pressed key.
	* @param player the player that pressed the key. Pass <tt>null</tt> on the client side.
	*/
	void keyDown(char character, int code, EntityPlayer player);

	/**
	* Signals a key up event for the buffer.
	* <p/>
	* On the client side this causes a packet to be sent to the server. On the
	* server side this will trigger a message that will be picked up by
	* keyboards, which will then cause a signal in attached machines.
	*
	* @param character the character of the released key.
	* @param code the key code of the released key.
	* @param player the player that released the key. Pass <tt>null</tt> on the client side.
	*/
	void keyUp(char character, int code, EntityPlayer player);

	/**
	* Signals a clipboard paste event for the buffer.
	* <p/>
	* On the client side this causes a packet to be sent to the server. On the
	* server side this will trigger a message that will be picked up by
	* keyboards, which will then cause a signal in attached machines.
	*
	* @param value the text that was pasted.
	* @param player the player that pasted the text. Pass <tt>null</tt> on the client side.
	*/
	void clipboard(String value, EntityPlayer player);

	/**
	* Signals a mouse button down event for the buffer.
	* <p/>
	* On the client side this causes a packet to be sent to the server. On the
	* server side this will cause a signal in attached machines.
	*
	* @param x the horizontal coordinate of the mouse, in characters.
	* @param y the vertical coordinate of the mouse, in characters.
	* @param button the button of the mouse that was pressed.
	* @param player the player that pressed the mouse button. Pass <tt>null</tt> on the client side.
	*/
	void mouseDown(int x, int y, int button, EntityPlayer player);

	/**
	* Signals a mouse drag event for the buffer.
	* <p/>
	* On the client side this causes a packet to be sent to the server. On the
	* server side this will cause a signal in attached machines.
	*
	* @param x the horizontal coordinate of the mouse, in characters.
	* @param y the vertical coordinate of the mouse, in characters.
	* @param button the button of the mouse that is pressed.
	* @param player the player that moved the mouse. Pass <tt>null</tt> on the client side.
	*/
	void mouseDrag(int x, int y, int button, EntityPlayer player);

	/**
	* Signals a mouse button release event for the buffer.
	* <p/>
	* On the client side this causes a packet to be sent to the server. On the
	* server side this will cause a signal in attached machines.
	*
	* @param x the horizontal coordinate of the mouse, in characters.
	* @param y the vertical coordinate of the mouse, in characters.
	* @param button the button of the mouse that was released.
	* @param player the player that released the mouse button. Pass <tt>null</tt> on the client side.
	*/
	void mouseUp(int x, int y, int button, EntityPlayer player);

	/**
	* Signals a mouse wheel scroll event for the buffer.
	* <p/>
	* On the client side this causes a packet to be sent to the server. On the
	* server side this will cause a signal in attached machines.
	*
	* @param x the horizontal coordinate of the mouse, in characters.
	* @param y the vertical coordinate of the mouse, in characters.
	* @param delta indicates the direction of the mouse scroll.
	* @param player the player that scrolled the mouse wheel. Pass <tt>null</tt> on the client side.
	*/
	void mouseScroll(int x, int y, int delta, EntityPlayer player);

	// ----------------------------------------------------------------------- //

	/**
	* Used when setting a buffer's maximum color depth.
	*/
	public static enum ColorDepth {
	/**
	* Monochrome color, black and white.
	*/
	OneBit,

	/**
	* 16 color palette, defaults to Minecraft colors.
	*/
	FourBit,

	/**
	* 240 colors, 16 color palette, defaults to grayscale.
	*/
	EightBit
	}
	}