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Copy pathVertexBuffer.java
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63 lines (51 loc) · 1.58 KB
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package processing.opengl;
import processing.opengl.PGraphicsOpenGL.GLResourceVertexBuffer;
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boolean outdated = !pgl.contextIsCurrent(context);
if (outdated) {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return outdated;
}
}