Class Texture

core/src/processing/opengl/Texture.java:44–1670

This class wraps an OpenGL texture. By Andres Colubri

 *
 */
public class Texture implements PConstants {
  /**
   * Texture with normalized UV.
   */
  protected static final int TEX2D   = 0;
  /**
   * Texture with un-normalized UV.
   */
  protected static final int TEXRECT = 1;

  /** Point sampling: both magnification and minification filtering are set
   * to nearest */
  protected static final int POINT = 2;
  /** Linear sampling: magnification filtering is nearest, minification set
   * to linear */
  protected static final int LINEAR = 3;
  /** Bilinear sampling: both magnification filtering is set to linear and
   * minification either to linear-mipmap-nearest (linear interpolation is used
   * within a mipmap, but not between different mipmaps). */
  protected static final int BILINEAR = 4;
  /** Trilinear sampling: magnification filtering set to linear, minification to
   * linear-mipmap-linear, which offers the best mipmap quality since linear
   * interpolation to compute the value in each of two maps and then
   * interpolates linearly between these two values. */
  protected static final int TRILINEAR = 5;


  // This constant controls how many times pixelBuffer and rgbaPixels can be
  // accessed before they are not released anymore. The idea is that if they
  // have been used only a few times, it doesn't make sense to keep them around.
  protected static final int MAX_UPDATES = 10;

  // The minimum amount of free JVM's memory (in MB) before pixelBuffer and
  // rgbaPixels are released every time after they are used.
  protected static final int MIN_MEMORY = 5;

  public int width, height;

  public int glName;
  public int glTarget;
  public int glFormat;
  public int glMinFilter;
  public int glMagFilter;
  public int glWrapS;
  public int glWrapT;
  public int glWidth;
  public int glHeight;
  private GLResourceTexture glres;

  protected PGraphicsOpenGL pg;
  protected PGL pgl;                // The interface between Processing and OpenGL.
  protected int context;            // The context that created this texture.
  protected boolean colorBuffer;    // true if it is the color attachment of
                                    // FrameBuffer object.

  protected boolean usingMipmaps;
  protected boolean usingRepeat;
  protected float maxTexcoordU;