library / com.otaliastudios.opengl.program / GlProgram

GlProgram

open class GlProgram : GlBindable

Base class for a program that accepts a vertex and a fragment shader in the constructor. The program will be created automatically and released when release is called.

Subclasses are required to do two things - typically, during the onPreDraw callback: 1 Inspect the GlDrawable properties:

GlDrawable.vertexArray
GlDrawable.coordsPerVertex
GlDrawable.vertexStride These should be passed to the vertex shader. 2 Pass the MVP matrix to the vertex shader as well.

The vertex shader should then use the two to compute the gl_Position.

Constructors

<init>

GlProgram(handle: Int)
GlProgram(vertexShader: String, fragmentShader: String)
GlProgram(vararg shaders: GlShader)

Base class for a program that accepts a vertex and a fragment shader in the constructor. The program will be created automatically and released when release is called.

GlProgram(handle: Int, ownsHandle: Boolean, vararg shaders: GlShader)

Properties

handle

val handle: Int

Functions

bind	`open fun bind(): Unit`
draw	`fun draw(drawable: GlDrawable, modelViewProjectionMatrix: FloatArray = drawable.modelMatrix): Unit`
getAttribHandle	`fun getAttribHandle(name: String): GlProgramLocation`
getUniformHandle	`fun getUniformHandle(name: String): GlProgramLocation`
onDraw	`open fun onDraw(drawable: GlDrawable): Unit`
onPostDraw	`open fun onPostDraw(drawable: GlDrawable): Unit`
onPreDraw	`open fun onPreDraw(drawable: GlDrawable, modelViewProjectionMatrix: FloatArray): Unit`
release	`open fun release(): Unit`
unbind	`open fun unbind(): Unit`

Companion Object Functions

create

fun create(vertexShaderSource: String, fragmentShaderSource: String): Int
fun create(vararg shaders: GlShader): Int

Extension Functions

use	`fun GlBindable.use(block: () -> Unit): Unit`

Inheritors

GlNativeFlatProgram	An GlProgram that uses basic flat-shading rendering, based on FlatShadedProgram from grafika. `open class GlNativeFlatProgram : GlProgram`
GlTextureProgram	Base implementation for a GlProgram that draws textures. `open class GlTextureProgram : GlProgram`