/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */

/*

Part of the Processing project - http://processing.org

Copyright (c) 2012-15 The Processing Foundation

Copyright (c) 2004-12 Ben Fry and Casey Reas

Copyright (c) 2001-04 Massachusetts Institute of Technology

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation, version 2.1.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General

Public License along with this library; if not, write to the

Free Software Foundation, Inc., 59 Temple Place, Suite 330,

Boston, MA 02111-1307 USA

*/

package processing.opengl;

import processing.core.*;

import java.io.File;

import java.lang.ref.ReferenceQueue;

import java.lang.ref.WeakReference;

import java.net.URL;

import java.nio.*;

import java.util.*;

/**

* OpenGL renderer.

*/

public class PGraphicsOpenGL extends PGraphics {

/** Interface between Processing and OpenGL */

public PGL pgl;

/** The renderer currently in use. */

public PGraphicsOpenGL currentPG;

/** Font cache for texture objects. */

protected WeakHashMap<PFont, FontTexture> fontMap;

// ........................................................

// Basic rendering parameters:

/** Whether the PGraphics object is ready to render or not. */

public boolean initialized;

/** Flush modes: continuously (geometry is flushed after each call to

* endShape) when-full (geometry is accumulated until a maximum size is

* reached. */

static protected final int FLUSH_CONTINUOUSLY = 0;

static protected final int FLUSH_WHEN_FULL = 1;

/** Type of geometry: immediate is that generated with beginShape/vertex/

* endShape, retained is the result of creating a PShapeOpenGL object with

* createShape. */

static protected final int IMMEDIATE = 0;

static protected final int RETAINED = 1;

/** Current flush mode. */

protected int flushMode = FLUSH_WHEN_FULL;

// ........................................................

// VBOs for immediate rendering:

protected VertexBuffer bufPolyVertex;

protected VertexBuffer bufPolyColor;

protected VertexBuffer bufPolyNormal;

protected VertexBuffer bufPolyTexcoord;

protected VertexBuffer bufPolyAmbient;

protected VertexBuffer bufPolySpecular;

protected VertexBuffer bufPolyEmissive;

protected VertexBuffer bufPolyShininess;

protected VertexBuffer bufPolyIndex;

protected boolean polyBuffersCreated = false;

protected int polyBuffersContext;

protected VertexBuffer bufLineVertex;

protected VertexBuffer bufLineColor;

protected VertexBuffer bufLineAttrib;

protected VertexBuffer bufLineIndex;

protected boolean lineBuffersCreated = false;

protected int lineBuffersContext;

protected VertexBuffer bufPointVertex;

protected VertexBuffer bufPointColor;

protected VertexBuffer bufPointAttrib;

protected VertexBuffer bufPointIndex;

protected boolean pointBuffersCreated = false;

protected int pointBuffersContext;

// Generic vertex attributes (only for polys)

protected AttributeMap polyAttribs;

static protected final int INIT_VERTEX_BUFFER_SIZE = 256;

static protected final int INIT_INDEX_BUFFER_SIZE = 512;

// ........................................................

// GL parameters

static protected boolean glParamsRead = false;

/** Extensions used by Processing */

static public boolean npotTexSupported;

static public boolean autoMipmapGenSupported;

static public boolean fboMultisampleSupported;

static public boolean packedDepthStencilSupported;

static public boolean anisoSamplingSupported;

static public boolean blendEqSupported;

static public boolean readBufferSupported;

static public boolean drawBufferSupported;

/** Some hardware limits */

static public int maxTextureSize;

static public int maxSamples;

static public float maxAnisoAmount;

static public int depthBits;

static public int stencilBits;

/** OpenGL information strings */

static public String OPENGL_VENDOR;

static public String OPENGL_RENDERER;

static public String OPENGL_VERSION;

static public String OPENGL_EXTENSIONS;

static public String GLSL_VERSION;

// ........................................................

// Shaders

static protected URL defColorShaderVertURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/ColorVert.glsl");

static protected URL defTextureShaderVertURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/TexVert.glsl");

static protected URL defLightShaderVertURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/LightVert.glsl");

static protected URL defTexlightShaderVertURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/TexLightVert.glsl");

static protected URL defColorShaderFragURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/ColorFrag.glsl");

static protected URL defTextureShaderFragURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/TexFrag.glsl");

static protected URL defLightShaderFragURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/LightFrag.glsl");

static protected URL defTexlightShaderFragURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/TexLightFrag.glsl");

static protected URL defLineShaderVertURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/LineVert.glsl");

static protected URL defLineShaderFragURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/LineFrag.glsl");

static protected URL defPointShaderVertURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/PointVert.glsl");

static protected URL defPointShaderFragURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/PointFrag.glsl");

static protected URL maskShaderFragURL =

PGraphicsOpenGL.class.getResource("/processing/opengl/shaders/MaskFrag.glsl");

protected PShader defColorShader;

protected PShader defTextureShader;

protected PShader defLightShader;

protected PShader defTexlightShader;

protected PShader defLineShader;

protected PShader defPointShader;

protected PShader maskShader;

protected PShader polyShader;

protected PShader lineShader;

protected PShader pointShader;

// ........................................................

// Tessellator, geometry

protected InGeometry inGeo;

protected TessGeometry tessGeo;

protected TexCache texCache;

protected Tessellator tessellator;

// ........................................................

// Depth sorter

protected DepthSorter sorter;

protected boolean isDepthSortingEnabled;

// ........................................................

// Async pixel reader

protected AsyncPixelReader asyncPixelReader;

protected boolean asyncPixelReaderInitialized;

// Keeps track of ongoing transfers so they can be finished.

// Set is copied to the List when we need to iterate it

// so that readers can remove themselves from the Set during

// iteration if they don't have any ongoing transfers.

protected static final Set<PGraphicsOpenGL.AsyncPixelReader>

ongoingPixelTransfers = new HashSet<>();

protected static final List<PGraphicsOpenGL.AsyncPixelReader>

ongoingPixelTransfersIterable = new ArrayList<>();

// ........................................................

// Camera:

/** Camera field of view. */

public float cameraFOV;

/** Default position of the camera. */

public float cameraX, cameraY, cameraZ;

/** Distance of the near and far planes. */

public float cameraNear, cameraFar;

/** Aspect ratio of camera's view. */

public float cameraAspect;

/** Distance between camera eye and center. */

protected float eyeDist;

/** Flag to indicate that we are inside beginCamera/endCamera block. */

protected boolean manipulatingCamera;

// ........................................................

// All the matrices required for camera and geometry transformations.

public PMatrix3D projection;

public PMatrix3D camera;

public PMatrix3D cameraInv;

public PMatrix3D modelview;

public PMatrix3D modelviewInv;

public PMatrix3D projmodelview;

// To pass to shaders

protected float[] glProjection;

protected float[] glModelview;

protected float[] glProjmodelview;

protected float[] glNormal;

// Useful to have around.

static protected PMatrix3D identity = new PMatrix3D();

/**

* Marks when changes to the size have occurred, so that the camera

* will be reset in beginDraw().

*/

protected boolean sized;

static protected final int MATRIX_STACK_DEPTH = 32;

protected int modelviewStackDepth;

protected int projectionStackDepth;

/** Modelview matrix stack **/

protected float[][] modelviewStack = new float[MATRIX_STACK_DEPTH][16];

/** Inverse modelview matrix stack **/

protected float[][] modelviewInvStack = new float[MATRIX_STACK_DEPTH][16];

/** Camera matrix stack **/

protected float[][] cameraStack = new float[MATRIX_STACK_DEPTH][16];

/** Inverse camera matrix stack **/

protected float[][] cameraInvStack = new float[MATRIX_STACK_DEPTH][16];

/** Projection matrix stack **/

protected float[][] projectionStack = new float[MATRIX_STACK_DEPTH][16];

// ........................................................

// Lights:

public boolean lights;

public int lightCount = 0;

/** Light types */

public int[] lightType;

/** Light positions */

public float[] lightPosition;

/** Light direction (normalized vector) */

public float[] lightNormal;

/**

* Ambient colors for lights.

*/

public float[] lightAmbient;

/**

* Diffuse colors for lights.

*/

public float[] lightDiffuse;

/**

* Specular colors for lights. Internally these are stored as numbers between

* 0 and 1.

*/

public float[] lightSpecular;

/** Light falloff */

public float[] lightFalloffCoefficients;

/** Light spot parameters: Cosine of light spot angle

* and concentration */

public float[] lightSpotParameters;

/** Current specular color for lighting */

public float[] currentLightSpecular;

/** Current light falloff */

public float currentLightFalloffConstant;

public float currentLightFalloffLinear;

public float currentLightFalloffQuadratic;

// ........................................................

// Texturing:

protected int textureWrap = CLAMP;

protected int textureSampling = Texture.TRILINEAR;

// ........................................................

// Clipping

protected boolean clip = false;

/** Clipping rectangle. */

protected int[] clipRect = {0, 0, 0, 0};

// ........................................................

// Text:

/** Font texture of currently selected font. */

FontTexture textTex;

// .......................................................

// Framebuffer stack:

static protected final int FB_STACK_DEPTH = 16;

protected int fbStackDepth;

protected FrameBuffer[] fbStack;

protected FrameBuffer drawFramebuffer;

protected FrameBuffer readFramebuffer;

protected FrameBuffer currentFramebuffer;

// .......................................................

// Offscreen rendering:

protected FrameBuffer offscreenFramebuffer;

protected FrameBuffer multisampleFramebuffer;

protected boolean offscreenMultisample;

protected boolean pixOpChangedFB;

// ........................................................

// Screen surface:

/** Texture containing the current frame */

protected Texture texture = null;

/** Texture containing the previous frame */

protected Texture ptexture = null;

/** IntBuffer wrapping the pixels array. */

protected IntBuffer pixelBuffer;

/** Array to store pixels in OpenGL format. */

protected int[] nativePixels;

/** IntBuffer wrapping the native pixels array. */

protected IntBuffer nativePixelBuffer;

/** texture used to apply a filter on the screen image. */

protected Texture filterTexture = null;

/** PImage that wraps filterTexture. */

protected PImage filterImage;

// ........................................................

// Utility variables:

/** True if we are inside a beginDraw()/endDraw() block. */

protected boolean drawing = false;

/** Used to detect continuous use of the smooth/noSmooth functions */

protected boolean smoothDisabled = false;

protected int smoothCallCount = 0;

protected int lastSmoothCall = -10;

/** Used to avoid flushing the geometry when blendMode() is called with the

* same blend mode as the last */

protected int lastBlendMode = -1;

/** Type of pixels operation. */

static protected final int OP_NONE = 0;

static protected final int OP_READ = 1;

static protected final int OP_WRITE = 2;

protected int pixelsOp = OP_NONE;

/** Viewport dimensions. */

protected IntBuffer viewport;

protected boolean openContour = false;

protected boolean breakShape = false;

protected boolean defaultEdges = false;

static protected final int EDGE_MIDDLE = 0;

static protected final int EDGE_START = 1;

static protected final int EDGE_STOP = 2;

static protected final int EDGE_SINGLE = 3;

static protected final int EDGE_CLOSE = -1;

/** Used in round point and ellipse tessellation. The

* number of subdivisions per round point or ellipse is

* calculated with the following formula:

* n = min(M, max(N, (TWO_PI * size / F)))

* where size is a measure of the dimensions of the circle

* when projected on screen coordinates. F just sets the

* minimum number of subdivisions, while a smaller F

* would allow to have more detailed circles.

* N = MIN_POINT_ACCURACY

* M = MAX_POINT_ACCURACY

* F = POINT_ACCURACY_FACTOR

*/

final static protected int MIN_POINT_ACCURACY = 20;

final static protected int MAX_POINT_ACCURACY = 200;

final static protected float POINT_ACCURACY_FACTOR = 10.0f;

/** Used in quad point tessellation. */

final static protected float[][] QUAD_POINT_SIGNS =

{ {-1, +1}, {-1, -1}, {+1, -1}, {+1, +1} };

/** To get data from OpenGL. */

static protected IntBuffer intBuffer;

static protected FloatBuffer floatBuffer;

// ........................................................

// Error strings:

static final String OPENGL_THREAD_ERROR =

"Cannot run the OpenGL renderer outside the main thread, change your code" +

"\nso the drawing calls are all inside the main thread, " +

"\nor use the default renderer instead.";

static final String BLEND_DRIVER_ERROR =

"blendMode(%1$s) is not supported by this hardware (or driver)";

static final String BLEND_RENDERER_ERROR =

"blendMode(%1$s) is not supported by this renderer";

static final String ALREADY_BEGAN_CONTOUR_ERROR =

"Already called beginContour()";

static final String NO_BEGIN_CONTOUR_ERROR =

"Need to call beginContour() first";

static final String UNSUPPORTED_SMOOTH_LEVEL_ERROR =

"Smooth level %1$s is not available. Using %2$s instead";

static final String UNSUPPORTED_SMOOTH_ERROR =

"Smooth is not supported by this hardware (or driver)";

static final String TOO_MANY_SMOOTH_CALLS_ERROR =

"The smooth/noSmooth functions are being called too often.\n" +

"This results in screen flickering, so they will be disabled\n" +

"for the rest of the sketch's execution";

static final String UNSUPPORTED_SHAPE_FORMAT_ERROR =

"Unsupported shape format";

static final String MISSING_UV_TEXCOORDS_ERROR =

"No uv texture coordinates supplied with vertex() call";

static final String INVALID_FILTER_SHADER_ERROR =

"Your shader cannot be used as a filter because is of type POINT or LINES";

static final String INCONSISTENT_SHADER_TYPES =

"The vertex and fragment shaders have different types";

static final String WRONG_SHADER_TYPE_ERROR =

"shader() called with a wrong shader";

static final String SHADER_NEED_LIGHT_ATTRIBS =

"The provided shader needs light attributes (ambient, diffuse, etc.), but " +

"the current scene is unlit, so the default shader will be used instead";

static final String MISSING_FRAGMENT_SHADER =

"The fragment shader is missing, cannot create shader object";

static final String MISSING_VERTEX_SHADER =

"The vertex shader is missing, cannot create shader object";

static final String UNKNOWN_SHADER_KIND_ERROR =

"Unknown shader kind";

static final String NO_TEXLIGHT_SHADER_ERROR =

"Your shader needs to be of TEXLIGHT type " +

"to render this geometry properly, using default shader instead.";

static final String NO_LIGHT_SHADER_ERROR =

"Your shader needs to be of LIGHT type " +

"to render this geometry properly, using default shader instead.";

static final String NO_TEXTURE_SHADER_ERROR =

"Your shader needs to be of TEXTURE type " +

"to render this geometry properly, using default shader instead.";

static final String NO_COLOR_SHADER_ERROR =

"Your shader needs to be of COLOR type " +

"to render this geometry properly, using default shader instead.";

static final String TESSELLATION_ERROR =

"Tessellation Error: %1$s";

static final String GL_THREAD_NOT_CURRENT =

"You are trying to draw outside OpenGL's animation thread.\n" +

"Place all drawing commands in the draw() function, or inside\n" +

"your own functions as long as they are called from draw(),\n" +

"but not in event handling functions such as keyPressed()\n" +

"or mousePressed().";

//////////////////////////////////////////////////////////////

// INIT/ALLOCATE/FINISH

public PGraphicsOpenGL() {

pgl = createPGL(this);

if (intBuffer == null) {

intBuffer = PGL.allocateIntBuffer(2);

floatBuffer = PGL.allocateFloatBuffer(2);

}

viewport = PGL.allocateIntBuffer(4);

polyAttribs = newAttributeMap();

inGeo = newInGeometry(this, polyAttribs, IMMEDIATE);

tessGeo = newTessGeometry(this, polyAttribs, IMMEDIATE);

texCache = newTexCache(this);

projection = new PMatrix3D();

camera = new PMatrix3D();

cameraInv = new PMatrix3D();

modelview = new PMatrix3D();

modelviewInv = new PMatrix3D();

projmodelview = new PMatrix3D();

lightType = new int[PGL.MAX_LIGHTS];

lightPosition = new float[4 * PGL.MAX_LIGHTS];

lightNormal = new float[3 * PGL.MAX_LIGHTS];

lightAmbient = new float[3 * PGL.MAX_LIGHTS];

lightDiffuse = new float[3 * PGL.MAX_LIGHTS];

lightSpecular = new float[3 * PGL.MAX_LIGHTS];

lightFalloffCoefficients = new float[3 * PGL.MAX_LIGHTS];

lightSpotParameters = new float[2 * PGL.MAX_LIGHTS];

currentLightSpecular = new float[3];

initialized = false;

}

@Override

public void setParent(PApplet parent) {

super.setParent(parent);

if (pgl != null) {

pgl.sketch = parent;

}

}

@Override

public void setPrimary(boolean primary) {

super.setPrimary(primary);

pgl.setPrimary(primary);

format = ARGB;

if (primary) {

fbStack = new FrameBuffer[FB_STACK_DEPTH];

fontMap = new WeakHashMap<PFont, FontTexture>();

tessellator = new Tessellator();

} else {

tessellator = getPrimaryPG().tessellator;

}

}

//public void setPath(String path) // PGraphics

//public void setAntiAlias(int samples) // PGraphics

@Override

public void setSize(int iwidth, int iheight) {

width = iwidth;

height = iheight;

updatePixelSize();

// init perspective projection based on new dimensions

cameraFOV = 60 * DEG_TO_RAD; // at least for now

cameraX = width / 2.0f;

cameraY = height / 2.0f;

cameraZ = cameraY / ((float) Math.tan(cameraFOV / 2.0f));

cameraNear = cameraZ / 10.0f;

cameraFar = cameraZ * 10.0f;

cameraAspect = (float) width / (float) height;

sized = true;

}

@Override

public void dispose() { // PGraphics

if (asyncPixelReader != null) {

asyncPixelReader.dispose();

asyncPixelReader = null;

}

if (!primaryGraphics) {

deleteSurfaceTextures();

FrameBuffer ofb = offscreenFramebuffer;

FrameBuffer mfb = multisampleFramebuffer;

if (ofb != null) {

ofb.dispose();

}

if (mfb != null) {

mfb.dispose();

}

}

pgl.dispose();

super.dispose();

}

protected void setFlushMode(int mode) {

flushMode = mode;

}

protected void updatePixelSize() {

float f = pgl.getPixelScale();

pixelWidth = (int)(width * f);

pixelHeight = (int)(height * f);

}

//////////////////////////////////////////////////////////////

// PLATFORM-SPECIFIC CODE (Java, Android, etc.). Needs to be manually edited.

// Factory method

protected PGL createPGL(PGraphicsOpenGL pg) {

return new PJOGL(pg);

// return new PGLES(pg);

}

/*

@Override

// Android only

public void setFrameRate(float frameRate) {

pgl.setFrameRate(frameRate);

}

@Override

// Android only

public boolean canDraw() {

return pgl.canDraw();

}

@Override

// Android only

public void requestDraw() {

if (primaryGraphics) {

if (initialized) {

if (sized) pgl.reinitSurface();

if (parent.canDraw()) pgl.requestDraw();

} else {

initPrimary();

}

}

}

*/

@Override

// Java only

public PSurface createSurface() { // ignore

return surface = new PSurfaceJOGL(this);

}

public boolean saveImpl(String filename) {

// return super.save(filename); // ASYNC save frame using PBOs not yet available on Android

if (getHint(DISABLE_ASYNC_SAVEFRAME)) {

// Act as an opaque surface for the purposes of saving.

if (primaryGraphics) {

int prevFormat = format;

format = RGB;

boolean result = super.save(filename);

format = prevFormat;

return result;

}

return super.save(filename);

}

if (asyncImageSaver == null) {

asyncImageSaver = new AsyncImageSaver();

}

if (!asyncPixelReaderInitialized) {

// First call! Get this guy initialized

if (pgl.hasPBOs() && pgl.hasSynchronization()) {

asyncPixelReader = new AsyncPixelReader();

}

asyncPixelReaderInitialized = true;

}

if (asyncPixelReader != null && !loaded) {

boolean needEndDraw = false;

if (!drawing) {

beginDraw();

needEndDraw = true;

}

flush();

updatePixelSize();

// get the whole async package

asyncPixelReader.readAndSaveAsync(parent.sketchFile(filename));

if (needEndDraw) endDraw();

} else {

// async transfer is not supported or

// pixels are already in memory, just do async save

if (!loaded) loadPixels();

int format = primaryGraphics ? RGB : ARGB;

PImage target = asyncImageSaver.getAvailableTarget(pixelWidth, pixelHeight,

format);

if (target == null) return false;

int count = PApplet.min(pixels.length, target.pixels.length);

System.arraycopy(pixels, 0, target.pixels, 0, count);

asyncImageSaver.saveTargetAsync(this, target, parent.sketchFile(filename));

}

return true;

}

//////////////////////////////////////////////////////////////

// IMAGE METADATA FOR THIS RENDERER

@Override

public void setCache(PImage image, Object storage) {

if (image instanceof PGraphicsOpenGL) {

// Prevent strong reference to the key from the value by wrapping

// the Texture into WeakReference (proposed solution by WeakHashMap docs)

getPrimaryPG().cacheMap.put(image, new WeakReference<>(storage));

return;

}

getPrimaryPG().cacheMap.put(image, storage);

}

@Override

@SuppressWarnings("rawtypes")

public Object getCache(PImage image) {

Object storage = getPrimaryPG().cacheMap.get(image);

if (storage != null && storage.getClass() == WeakReference.class) {

// Unwrap the value, use getClass() for fast check

return ((WeakReference) storage).get();

}

return storage;

}

@Override

public void removeCache(PImage image) {

getPrimaryPG().cacheMap.remove(image);

}

//////////////////////////////////////////////////////////////

protected void setFontTexture(PFont font, FontTexture fontTexture) {

getPrimaryPG().fontMap.put(font, fontTexture);

}

protected FontTexture getFontTexture(PFont font) {

return getPrimaryPG().fontMap.get(font);

}

protected void removeFontTexture(PFont font) {

getPrimaryPG().fontMap.remove(font);

}

//////////////////////////////////////////////////////////////

// RESOURCE HANDLING

// Using the technique alternative to finalization described in:

// http://www.oracle.com/technetwork/articles/java/finalization-137655.html

static final private int MAX_DRAIN_GLRES_ITERATIONS = 10;

protected static class GLResourceTexture extends WeakReference<Texture> {

int glName;

private PGL pgl;

private int context;

static private ReferenceQueue<Texture> refQueue = new ReferenceQueue<Texture>();

static private List<GLResourceTexture> refList = new ArrayList<GLResourceTexture>();

static void drainRefQueueBounded() {

ReferenceQueue<Texture> refQueue = GLResourceTexture.referenceQueue();

int iterations = 0;

while (iterations < MAX_DRAIN_GLRES_ITERATIONS) {

GLResourceTexture res = (GLResourceTexture)refQueue.poll();

if (res == null) {

break;

}

res.dispose();

++iterations;

}

}

static ReferenceQueue<Texture> referenceQueue() {

return refQueue;

}

public GLResourceTexture(Texture tex) {

super(tex, refQueue);

drainRefQueueBounded();

pgl = tex.pg.getPrimaryPGL();

pgl.genTextures(1, intBuffer);

tex.glName = intBuffer.get(0);

this.glName = tex.glName;

this.context = tex.context;

refList.add(this);

}

private void disposeNative() {

if (pgl != null) {

if (glName != 0) {

intBuffer.put(0, glName);

pgl.deleteTextures(1, intBuffer);

glName = 0;

}

pgl = null;

}

}

void dispose() {

refList.remove(this);

disposeNative();

}

@Override

public boolean equals(Object obj) {

GLResourceTexture other = (GLResourceTexture)obj;

return other.glName == glName &&

other.context == context;

}

@Override

public int hashCode() {

int result = 17;

result = 31 * result + glName;

result = 31 * result + context;

return result;

}

}

protected static class GLResourceVertexBuffer extends WeakReference<VertexBuffer> {

int glId;

private PGL pgl;

private int context;

static private ReferenceQueue<VertexBuffer> refQueue = new ReferenceQueue<VertexBuffer>();

static private List<GLResourceVertexBuffer> refList = new ArrayList<GLResourceVertexBuffer>();

static void drainRefQueueBounded() {

ReferenceQueue<VertexBuffer> refQueue = GLResourceVertexBuffer.referenceQueue();

int iterations = 0;

while (iterations < MAX_DRAIN_GLRES_ITERATIONS) {

GLResourceVertexBuffer res = (GLResourceVertexBuffer)refQueue.poll();

if (res == null) {

break;

}

res.dispose();

++iterations;

}

}

static ReferenceQueue<VertexBuffer> referenceQueue() {

return refQueue;

}

public GLResourceVertexBuffer(VertexBuffer vbo) {

super(vbo, refQueue);

drainRefQueueBounded();

pgl = vbo.pgl.graphics.getPrimaryPGL();

pgl.genBuffers(1, intBuffer);

vbo.glId = intBuffer.get(0);

this.glId = vbo.glId;

this.context = vbo.context;

refList.add(this);

}

private void disposeNative() {

if (pgl != null) {

if (glId != 0) {

intBuffer.put(0, glId);

pgl.deleteBuffers(1, intBuffer);

glId = 0;

}

pgl = null;

}

}

void dispose() {

refList.remove(this);

disposeNative();

}

@Override

public boolean equals(Object obj) {

GLResourceVertexBuffer other = (GLResourceVertexBuffer)obj;

return other.glId == glId &&

other.context == context;

}

@Override

public int hashCode() {

int result = 17;

result = 31 * result + glId;

result = 31 * result + context;

return result;

}

}

protected static class GLResourceShader extends WeakReference<PShader> {

int glProgram;

int glVertex;

int glFragment;

private PGL pgl;

private int context;

static private ReferenceQueue<PShader> refQueue = new ReferenceQueue<PShader>();

static private List<GLResourceShader> refList = new ArrayList<GLResourceShader>();

static void drainRefQueueBounded() {

ReferenceQueue<PShader> refQueue = GLResourceShader.referenceQueue();

int iterations = 0;

while (iterations < MAX_DRAIN_GLRES_ITERATIONS) {

GLResourceShader res = (GLResourceShader)refQueue.poll();

if (res == null) {

break;

}

res.dispose();

++iterations;

}

}

static ReferenceQueue<PShader> referenceQueue() {

return refQueue;

}

public GLResourceShader(PShader sh) {

super(sh, refQueue);

drainRefQueueBounded();

this.pgl = sh.pgl.graphics.getPrimaryPGL();

sh.glProgram = pgl.createProgram();

sh.glVertex = pgl.createShader(PGL.VERTEX_SHADER);

sh.glFragment = pgl.createShader(PGL.FRAGMENT_SHADER);