processing/core/src/processing/opengl/VertexBuffer.java at master · classicist/processing · GitHub

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

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

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.opengl.PGraphicsOpenGL.GLResourceVertexBuffer;

// TODO: need to combine with PGraphicsOpenGL.VertexAttribute

public class VertexBuffer {

static protected final int INIT_VERTEX_BUFFER_SIZE = 256;

static protected final int INIT_INDEX_BUFFER_SIZE = 512;

public int glId;

int target;

int elementSize;

int ncoords;

boolean index;

protected PGL pgl; // The interface between Processing and OpenGL.

protected int context; // The context that created this texture.

private GLResourceVertexBuffer glres;

VertexBuffer(PGraphicsOpenGL pg, int target, int ncoords, int esize) {

this(pg, target, ncoords, esize, false);

}

VertexBuffer(PGraphicsOpenGL pg, int target, int ncoords, int esize, boolean index) {

pgl = pg.pgl;

context = pgl.createEmptyContext();

this.target = target;

this.ncoords = ncoords;

this.elementSize = esize;

this.index = index;

create();

init();

}

protected void create() {

context = pgl.getCurrentContext();

glres = new GLResourceVertexBuffer(this);

}

protected void init() {

int size = index ? ncoords * INIT_INDEX_BUFFER_SIZE * elementSize :

ncoords * INIT_VERTEX_BUFFER_SIZE * elementSize;

pgl.bindBuffer(target, glId);

pgl.bufferData(target, size, null, PGL.STATIC_DRAW);

}

protected void dispose() {

if (glres != null) {

glres.dispose();

glId = 0;

glres = null;

}

protected boolean contextIsOutdated() {

boolean outdated = !pgl.contextIsCurrent(context);

if (outdated) {

dispose();

}

return outdated;

}

processing/core/src/processing/opengl/VertexBuffer.java at master · classicist/processing · GitHub

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