66 lines
2.3 KiB
Kotlin
66 lines
2.3 KiB
Kotlin
package org.openrndr.extra.noclear
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import org.openrndr.Extension
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import org.openrndr.Program
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import org.openrndr.color.ColorRGBa
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import org.openrndr.draw.*
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import org.openrndr.math.Matrix44
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class NoClear(val multisample: BufferMultisample = BufferMultisample.Disabled) : Extension {
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override var enabled: Boolean = true
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private var renderTarget: RenderTarget? = null
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private var resolvedColorBuffer: ColorBuffer? = null
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/**
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* code-block to draw an optional custom backdrop
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*/
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var backdrop: (() -> Unit)? = null
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override fun beforeDraw(drawer: Drawer, program: Program) {
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if (program.width > 0 && program.height > 0) { // only if the window is not minimised
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if (renderTarget == null || renderTarget?.width != program.width || renderTarget?.height != program.height) {
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renderTarget?.let {
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it.colorBuffer(0).destroy()
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it.detachColorAttachments()
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it.destroy()
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}
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renderTarget = renderTarget(program.width, program.height, program.window.contentScale, multisample) {
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colorBuffer()
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depthBuffer()
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}
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if (multisample != BufferMultisample.Disabled) {
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resolvedColorBuffer?.destroy()
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resolvedColorBuffer = colorBuffer(program.width, program.height, program.window.contentScale)
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}
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renderTarget?.let {
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drawer.withTarget(it) {
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clear(program.backgroundColor ?: ColorRGBa.TRANSPARENT)
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backdrop?.invoke() // draw custom backdrop
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}
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}
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}
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}
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renderTarget?.bind()
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}
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override fun afterDraw(drawer: Drawer, program: Program) {
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renderTarget?.unbind()
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renderTarget?.let {
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drawer.isolated {
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drawer.ortho()
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drawer.view = Matrix44.IDENTITY
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drawer.model = Matrix44.IDENTITY
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if (multisample != BufferMultisample.Disabled) {
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it.colorBuffer(0).copyTo(resolvedColorBuffer!!)
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drawer.image(resolvedColorBuffer!!)
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} else {
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drawer.image(it.colorBuffer(0))
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}
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}
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}
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}
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} |