commonMain.earth.worldwind.render.buffer.IntBufferObject.kt Maven / Gradle / Ivy

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The WorldWind Kotlin SDK (WWK) includes the library, examples and tutorials for building multiplatform 3D virtual globe applications for Android, Web and Java.

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package earth.worldwind.render.buffer

import earth.worldwind.draw.DrawContext
import earth.worldwind.util.kgl.GL_STATIC_DRAW

open class IntBufferObject(
    target: Int, array: IntArray, size: Int = array.size
) : AbstractBufferObject(target, size * Int.SIZE_BYTES) {
    protected var array: IntArray? = array

    override fun release(dc: DrawContext) {
        super.release(dc)
        array = null // array can be non-null if the object has not been bound
    }

    override fun bindBuffer(dc: DrawContext): Boolean {
        array?.let { loadBuffer(dc) }.also { array = null }
        return super.bindBuffer(dc)
    }

    override fun loadBufferObjectData(dc: DrawContext) {
        array?.let { dc.gl.bufferData(target, byteCount, it, GL_STATIC_DRAW) }
    }
}