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

/*

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

Copyright (c) 2004-13 Ben Fry and Casey Reas

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

modify it under the terms of the GNU Lesser General Public

License version 2.1 as published by the Free Software Foundation.

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.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. */

protected 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:

public int glPolyVertex;

public int glPolyColor;

public int glPolyNormal;

public int glPolyTexcoord;

public int glPolyAmbient;

public int glPolySpecular;

public int glPolyEmissive;

public int glPolyShininess;

public int glPolyIndex;

protected boolean polyBuffersCreated = false;

protected int polyBuffersContext;

public int glLineVertex;

public int glLineColor;

public int glLineAttrib;

public int glLineIndex;

protected boolean lineBuffersCreated = false;

protected int lineBuffersContext;

public int glPointVertex;

public int glPointColor;

public int glPointAttrib;

public int glPointIndex;

protected boolean pointBuffersCreated = false;

protected int pointBuffersContext;

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;

/** 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;

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

// GL resources:

static protected HashMap<GLResource, Boolean> glTextureObjects =

new HashMap<GLResource, Boolean>();

static protected HashMap<GLResource, Boolean> glVertexBuffers =

new HashMap<GLResource, Boolean>();

static protected HashMap<GLResource, Boolean> glFrameBuffers =

new HashMap<GLResource, Boolean>();

static protected HashMap<GLResource, Boolean> glRenderBuffers =

new HashMap<GLResource, Boolean>();

static protected HashMap<GLResource, Boolean> glslPrograms =

new HashMap<GLResource, Boolean>();

static protected HashMap<GLResource, Boolean> glslVertexShaders =

new HashMap<GLResource, Boolean>();

static protected HashMap<GLResource, Boolean> glslFragmentShaders =

new HashMap<GLResource, Boolean>();

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

// Shaders

static protected URL defColorShaderVertURL =

PGraphicsOpenGL.class.getResource("ColorVert.glsl");

static protected URL defTextureShaderVertURL =

PGraphicsOpenGL.class.getResource("TextureVert.glsl");

static protected URL defLightShaderVertURL =

PGraphicsOpenGL.class.getResource("LightVert.glsl");

static protected URL defTexlightShaderVertURL =

PGraphicsOpenGL.class.getResource("TexlightVert.glsl");

static protected URL defColorShaderFragURL =

PGraphicsOpenGL.class.getResource("ColorFrag.glsl");

static protected URL defTextureShaderFragURL =

PGraphicsOpenGL.class.getResource("TextureFrag.glsl");

static protected URL defLightShaderFragURL =

PGraphicsOpenGL.class.getResource("LightFrag.glsl");

static protected URL defTexlightShaderFragURL =

PGraphicsOpenGL.class.getResource("TexlightFrag.glsl");

static protected URL defLineShaderVertURL =

PGraphicsOpenGL.class.getResource("LineVert.glsl");

static protected URL defLineShaderFragURL =

PGraphicsOpenGL.class.getResource("LineFrag.glsl");

static protected URL defPointShaderVertURL =

PGraphicsOpenGL.class.getResource("PointVert.glsl");

static protected URL defPointShaderFragURL =

PGraphicsOpenGL.class.getResource("PointFrag.glsl");

static protected URL maskShaderFragURL =

PGraphicsOpenGL.class.getResource("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;

static protected Tessellator tessellator;

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

// 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;

/** Actual position of the camera. */

protected float cameraEyeX, cameraEyeY, cameraEyeZ;

/** 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();

protected boolean matricesAllocated = false;

/**

* 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;

protected boolean lightsAllocated = false;

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

// 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;

/** Texture containing the previous frame */

protected Texture ptexture;

/** 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;

/** PImage that wraps filterTexture. */

protected PImage filterImage;

/** Flag to indicate that pixels array is up-to-date and

* ready to be manipulated through the set()/get() methods */

protected boolean arePixelsUpToDate;

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

// Utility variables:

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

protected boolean drawing = false;

/** Used to indicate an OpenGL surface recreation */

protected boolean restoreSurface = 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;

/** Used to register calls to glClear. */

protected boolean clearColorBuffer;

protected boolean clearColorBuffer0;

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 TOO_LONG_STROKE_PATH_ERROR =

"Stroke path is too long, some bevel triangles won't be added";

static final String TESSELLATION_ERROR =

"Tessellation Error: %1$s";

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

// INIT/ALLOCATE/FINISH

public PGraphicsOpenGL() {

pgl = createPGL(this);

if (tessellator == null) {

tessellator = new Tessellator();

}

if (intBuffer == null) {

intBuffer = PGL.allocateIntBuffer(2);

floatBuffer = PGL.allocateFloatBuffer(2);

}

viewport = PGL.allocateIntBuffer(4);

inGeo = newInGeometry(this, IMMEDIATE);

tessGeo = newTessGeometry(this, IMMEDIATE);

texCache = newTexCache(this);

initialized = false;

}

@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>();

}

}

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

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

@Override

public void setFrameRate(float frameRate) {

pgl.setFps(frameRate);

}

@Override

public void setSize(int iwidth, int iheight) {

width = iwidth;

height = iheight;

allocate();

// 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;

}

/**

* Called by resize(), this handles creating the actual GLCanvas the

* first time around, or simply resizing it on subsequent calls.

* There is no pixel array to allocate for an OpenGL canvas

* because OpenGL's pixel buffer is all handled internally.

*/

@Override

protected void allocate() {

super.allocate();

if (!matricesAllocated) {

projection = new PMatrix3D();

camera = new PMatrix3D();

cameraInv = new PMatrix3D();

modelview = new PMatrix3D();

modelviewInv = new PMatrix3D();

projmodelview = new PMatrix3D();

matricesAllocated = true;

}

if (!lightsAllocated) {

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];

lightsAllocated = true;

}

}

@Override

public void dispose() { // PGraphics

super.dispose();

if (primarySurface) {

// Swap buffers the end to make sure that no

// garbage is shown on the screen, this particularly

// affects non-interactive sketches on windows that

// render only 1 frame, so no enough rendering

// iterations have been conducted so far to properly

// initialize all the buffers.

pgl.swapBuffers();

}

finalizePolyBuffers();

finalizeLineBuffers();

finalizePointBuffers();

deleteSurfaceTextures();

if (primarySurface) {

deleteDefaultShaders();

} else {

if (offscreenFramebuffer != null) {

offscreenFramebuffer.dispose();

}

if (multisampleFramebuffer != null) {

multisampleFramebuffer.dispose();

}

}

deleteFinalizedGLResources(pgl);

if (primarySurface) {

pgl.deleteSurface();

}

}

@Override

protected void finalize() throws Throwable {

try {

finalizePolyBuffers();

finalizeLineBuffers();

finalizePointBuffers();

deleteSurfaceTextures();

if (!primarySurface) {

if (offscreenFramebuffer != null) {

offscreenFramebuffer.dispose();

offscreenFramebuffer = null;

}

if (multisampleFramebuffer != null) {

multisampleFramebuffer.dispose();

multisampleFramebuffer = null;

}

}

} finally {

super.finalize();

}

}

protected void setFlushMode(int mode) {

flushMode = mode;

}

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

// IMAGE METADATA FOR THIS RENDERER

@Override

public void setCache(PImage image, Object storage) {

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

}

@Override

public Object getCache(PImage image) {

return getPrimaryPG().cacheMap.get(image);

}

@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

protected static class GLResource {

int id;

int context;

GLResource(int id, int context) {

this.id = id;

this.context = context;

}

@Override

public boolean equals(Object obj) {

GLResource other = (GLResource)obj;

return other.id == id && other.context == context;

}

@Override

public int hashCode() {

int result = 17;

result = 31 * result + id;

result = 31 * result + context;

return result;

}

}

// Texture Objects -----------------------------------------------------------

protected static int createTextureObject(int context, PGL pgl) {

deleteFinalizedTextureObjects(pgl);

pgl.genTextures(1, intBuffer);

int id = intBuffer.get(0);

GLResource res = new GLResource(id, context);

if (!glTextureObjects.containsKey(res)) {

glTextureObjects.put(res, false);

}

return id;

}

protected static void deleteTextureObject(int id, int context, PGL pgl) {

GLResource res = new GLResource(id, context);

if (glTextureObjects.containsKey(res)) {

intBuffer.put(0, id);

if (pgl.threadIsCurrent()) pgl.deleteTextures(1, intBuffer);

glTextureObjects.remove(res);

}

}

protected static void deleteAllTextureObjects(PGL pgl) {

for (GLResource res : glTextureObjects.keySet()) {

intBuffer.put(0, res.id);

if (pgl.threadIsCurrent()) pgl.deleteTextures(1, intBuffer);

}

glTextureObjects.clear();

}

// This is synchronized because it is called from the GC thread.

synchronized protected static void finalizeTextureObject(int id, int context) {

GLResource res = new GLResource(id, context);

if (glTextureObjects.containsKey(res)) {

glTextureObjects.put(res, true);

}

}

protected static void deleteFinalizedTextureObjects(PGL pgl) {

Set<GLResource> finalized = new HashSet<GLResource>();

for (GLResource res : glTextureObjects.keySet()) {

if (glTextureObjects.get(res)) {

finalized.add(res);

intBuffer.put(0, res.id);

if (pgl.threadIsCurrent()) pgl.deleteTextures(1, intBuffer);

}

}

for (GLResource res : finalized) {

glTextureObjects.remove(res);

}

}

protected static void removeTextureObject(int id, int context) {

GLResource res = new GLResource(id, context);

if (glTextureObjects.containsKey(res)) {

glTextureObjects.remove(res);

}

}

// Vertex Buffer Objects -----------------------------------------------------

protected static int createVertexBufferObject(int context, PGL pgl) {

deleteFinalizedVertexBufferObjects(pgl);

pgl.genBuffers(1, intBuffer);

int id = intBuffer.get(0);

GLResource res = new GLResource(id, context);

if (!glVertexBuffers.containsKey(res)) {

glVertexBuffers.put(res, false);

}

return id;

}

protected static void deleteVertexBufferObject(int id, int context, PGL pgl) {

GLResource res = new GLResource(id, context);

if (glVertexBuffers.containsKey(res)) {

intBuffer.put(0, id);

if (pgl.threadIsCurrent()) pgl.deleteBuffers(1, intBuffer);

glVertexBuffers.remove(res);

}

}

protected static void deleteAllVertexBufferObjects(PGL pgl) {

for (GLResource res : glVertexBuffers.keySet()) {

intBuffer.put(0, res.id);

if (pgl.threadIsCurrent()) pgl.deleteBuffers(1, intBuffer);

}

glVertexBuffers.clear();

}

// This is synchronized because it is called from the GC thread.

synchronized static protected void finalizeVertexBufferObject(int id, int context) {

GLResource res = new GLResource(id, context);

if (glVertexBuffers.containsKey(res)) {

glVertexBuffers.put(res, true);

}

}

protected static void deleteFinalizedVertexBufferObjects(PGL pgl) {

Set<GLResource> finalized = new HashSet<GLResource>();

for (GLResource res : glVertexBuffers.keySet()) {

if (glVertexBuffers.get(res)) {

finalized.add(res);

intBuffer.put(0, res.id);

if (pgl.threadIsCurrent()) pgl.deleteBuffers(1, intBuffer);

}

}

for (GLResource res : finalized) {

glVertexBuffers.remove(res);

}

}

protected static void removeVertexBufferObject(int id, int context) {

GLResource res = new GLResource(id, context);

if (glVertexBuffers.containsKey(res)) {

glVertexBuffers.remove(res);

}

}

// FrameBuffer Objects -------------------------------------------------------

protected static int createFrameBufferObject(int context, PGL pgl) {

deleteFinalizedFrameBufferObjects(pgl);

pgl.genFramebuffers(1, intBuffer);

int id = intBuffer.get(0);

GLResource res = new GLResource(id, context);

if (!glFrameBuffers.containsKey(res)) {

glFrameBuffers.put(res, false);

}

return id;

}

protected static void deleteFrameBufferObject(int id, int context, PGL pgl) {

GLResource res = new GLResource(id, context);

if (glFrameBuffers.containsKey(res)) {

intBuffer.put(0, id);

if (pgl.threadIsCurrent()) pgl.deleteFramebuffers(1, intBuffer);

glFrameBuffers.remove(res);

}

}

protected static void deleteAllFrameBufferObjects(PGL pgl) {

for (GLResource res : glFrameBuffers.keySet()) {

intBuffer.put(0, res.id);

if (pgl.threadIsCurrent()) pgl.deleteFramebuffers(1, intBuffer);

}

glFrameBuffers.clear();

}

// This is synchronized because it is called from the GC thread.

synchronized static protected void finalizeFrameBufferObject(int id, int context) {

GLResource res = new GLResource(id, context);

if (glFrameBuffers.containsKey(res)) {

glFrameBuffers.put(res, true);

}

}

protected static void deleteFinalizedFrameBufferObjects(PGL pgl) {

Set<GLResource> finalized = new HashSet<GLResource>();

for (GLResource res : glFrameBuffers.keySet()) {

if (glFrameBuffers.get(res)) {

finalized.add(res);

intBuffer.put(0, res.id);

if (pgl.threadIsCurrent()) {

pgl.deleteFramebuffers(1, intBuffer);

}

}

}

for (GLResource res : finalized) {

glFrameBuffers.remove(res);

}

}

protected static void removeFrameBufferObject(int id, int context) {

GLResource res = new GLResource(id, context);

if (glFrameBuffers.containsKey(res)) {

glFrameBuffers.remove(res);

}

}

// RenderBuffer Objects ------------------------------------------------------

protected static int createRenderBufferObject(int context, PGL pgl) {

deleteFinalizedRenderBufferObjects(pgl);

pgl.genRenderbuffers(1, intBuffer);

int id = intBuffer.get(0);

GLResource res = new GLResource(id, context);

if (!glRenderBuffers.containsKey(res)) {

glRenderBuffers.put(res, false);

}

return id;

}

protected static void deleteRenderBufferObject(int id, int context, PGL pgl) {

GLResource res = new GLResource(id, context);

if (glRenderBuffers.containsKey(res)) {

intBuffer.put(0, id);

if (pgl.threadIsCurrent()) pgl.deleteRenderbuffers(1, intBuffer);

glRenderBuffers.remove(res);

}

}

protected static void deleteAllRenderBufferObjects(PGL pgl) {

for (GLResource res : glRenderBuffers.keySet()) {

intBuffer.put(0, res.id);

if (pgl.threadIsCurrent()) pgl.deleteRenderbuffers(1, intBuffer);

}

glRenderBuffers.clear();

}

// This is synchronized because it is called from the GC thread.

synchronized static protected void finalizeRenderBufferObject(int id, int context) {

GLResource res = new GLResource(id, context);

if (glRenderBuffers.containsKey(res)) {

glRenderBuffers.put(res, true);

}

}

protected static void deleteFinalizedRenderBufferObjects(PGL pgl) {

Set<GLResource> finalized = new HashSet<GLResource>();

for (GLResource res : glRenderBuffers.keySet()) {

if (glRenderBuffers.get(res)) {

finalized.add(res);

intBuffer.put(0, res.id);