Revision 2308 org.gvsig.raster/branches/org.gvsig.raster_dataaccess_refactoring/org.gvsig.raster.lib/org.gvsig.raster.lib.api/src/main/java/org/gvsig/fmap/dal/coverage/store/RasterQuery.java

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RasterQuery.java
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	 * This function calculates the shift in pixels en X and Y coordinate that
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	 * correspond with the first pixel, due to this pixel won't be drawn entirely.
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	 *
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	 * Dado unas coordenadas reales, un tama�o de buffer y un tama�o de raster.
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	 * Si el buffer es de mayor tama�o que el raster (supersampleo) quiere decir que
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	 * por cada pixel de buffer se repiten varios del raster. Esta funci�n calcula el
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	 * n�mero de pixels de desplazamiento en X e Y que corresponden al primer pixel del
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	 * Dado unas coordenadas reales, un tama?o de buffer y un tama?o de raster.
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	 * Si el buffer es de mayor tama?o que el raster (supersampleo) quiere decir que
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	 * por cada pixel de buffer se repiten varios del raster. Esta funci?n calcula el
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	 * n?mero de pixels de desplazamiento en X e Y que corresponden al primer pixel del
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	 * buffer en la esquina superior izquierda. Esto es necesario porque la coordenada
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	 * solicitada es real y puede no caer sobre un pixel completo. Este calculo es
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	 * util cuando un cliente quiere supersamplear sobre un buffer y que no se lo haga
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	 * el driver autom�ticamente.
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	 * el driver autom?ticamente.
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	 */
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	public double[] getStep();
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	/**


  		




  
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	 * Force that the built of the buffer be ARGB. Be careful with the renderBands. It 


  		




  
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	 * will have four bands as maximum.


  		




  
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	 */


  		




  
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	public void forceARGBRequest();


  		




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	 /**


  		




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	  * Buffer loaded by the provider. This buffer is created by the <code>RasterQuery</code>  


  		




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	  * but in some cases can be useful to pass the buffer already created by parameter. 


  		




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	  * In any case,  is advisable not to do it.


  		




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	  * @return


  		




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	  */


  		




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	 public void setBufferForProviders(Buffer buffer) throws QueryException;


  		




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	/**


  		




  
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	 * Force that the built of the buffer be RGB. Be careful with the renderBands. It 


  		




  
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	 * will have three bands as maximum.


  		




  
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	 */


  		




  
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	public void forceRGBRequest();


  		




  
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	/**


  		




  
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	 * Buffer loaded by the provider. This buffer is created by the <code>RasterQuery</code>  


  		




  
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	 * but in some cases can be useful to pass the buffer already created by parameter. 


  		




  
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	 * In any case,  is advisable not to do it.


  		




  
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	 * @return


  		




  
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	 */


  		




  
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	public void setBufferForProviders(Buffer buffer) throws QueryException;


  		




  
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	/**


  		




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	 * Clones this RasterQuery


  		




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	 * @return


  		




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	 */


  		












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