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5 changes: 5 additions & 0 deletions
5
kool-core/src/jsMain/kotlin/de/fabmax/kool/pipeline/backend/JsRenderBackend.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| package de.fabmax.kool.pipeline.backend | ||
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| interface JsRenderBackend { | ||
| suspend fun startRenderLoop() | ||
| } |
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156 changes: 156 additions & 0 deletions
156
kool-core/src/jsMain/kotlin/de/fabmax/kool/pipeline/backend/webgpu/RenderBackendWebGpu.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| package de.fabmax.kool.pipeline.backend.webgpu | ||
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| import de.fabmax.kool.KoolContext | ||
| import de.fabmax.kool.modules.ksl.KslComputeShader | ||
| import de.fabmax.kool.modules.ksl.KslShader | ||
| import de.fabmax.kool.pipeline.* | ||
| import de.fabmax.kool.pipeline.backend.DepthRange | ||
| import de.fabmax.kool.pipeline.backend.JsRenderBackend | ||
| import de.fabmax.kool.pipeline.backend.RenderBackend | ||
| import de.fabmax.kool.pipeline.backend.stats.BackendStats | ||
| import de.fabmax.kool.platform.JsContext | ||
| import de.fabmax.kool.scene.Scene | ||
| import de.fabmax.kool.util.LongHash | ||
| import de.fabmax.kool.util.logE | ||
| import de.fabmax.kool.util.logI | ||
| import de.fabmax.kool.util.logT | ||
| import kotlinx.browser.window | ||
| import kotlinx.coroutines.await | ||
| import org.w3c.dom.HTMLCanvasElement | ||
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| class RenderBackendWebGpu(val ctx: KoolContext, val canvas: HTMLCanvasElement) : RenderBackend, JsRenderBackend { | ||
| override val name: String = "WebGPU Backend" | ||
| override val apiName: String = "WebGPU" | ||
| override val deviceName: String = "WebGPU" | ||
| override val depthRange: DepthRange = DepthRange.ZERO_TO_ONE | ||
| override val canBlitRenderPasses: Boolean = false | ||
| override val isOnscreenInfiniteDepthCapable: Boolean = false // actually it can... | ||
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| private lateinit var adapter: GPUAdapter | ||
| private lateinit var device: GPUDevice | ||
| private lateinit var gpuContext: GPUCanvasContext | ||
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| init { | ||
| check(!js("!navigator.gpu") as Boolean) { | ||
| val txt = "WebGPU not supported on this browser." | ||
| js("alert(txt)") | ||
| txt | ||
| } | ||
| } | ||
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| override suspend fun startRenderLoop() { | ||
| adapter = checkNotNull(navigator.gpu.requestAdapter().await()) { | ||
| val txt = "No appropriate GPUAdapter found." | ||
| js("alert(txt)") | ||
| txt | ||
| } | ||
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| device = adapter.requestDevice().await() | ||
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| gpuContext = canvas.getContext("webgpu") as GPUCanvasContext | ||
| val canvasFormat = navigator.gpu.getPreferredCanvasFormat() | ||
| gpuContext.configure(GPUCanvasConfiguration(device, canvasFormat)) | ||
| logI { "WebGPU context created" } | ||
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| window.requestAnimationFrame { t -> (ctx as JsContext).renderFrame(t) } | ||
| } | ||
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| override fun renderFrame(ctx: KoolContext) { | ||
| BackendStats.resetPerFrameCounts() | ||
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| // if (ctx.disposablePipelines.isNotEmpty()) { | ||
| // ctx.disposablePipelines.forEach { | ||
| // shaderMgr.deleteShader(it) | ||
| // } | ||
| // ctx.disposablePipelines.clear() | ||
| // } | ||
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| // doOffscreenPasses(ctx.backgroundScene, ctx) | ||
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| for (i in ctx.scenes.indices) { | ||
| val scene = ctx.scenes[i] | ||
| if (scene.isVisible) { | ||
| // if (scene.framebufferCaptureMode == Scene.FramebufferCaptureMode.BeforeRender) { | ||
| // captureFramebuffer(scene) | ||
| // } | ||
| // doOffscreenPasses(scene, ctx) | ||
| doForegroundPass(scene) | ||
| } | ||
| } | ||
| } | ||
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| fun doForegroundPass(scene: Scene) { | ||
| val clearColor = scene.mainRenderPass.clearColor ?: return | ||
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| val encoder = device.createCommandEncoder() | ||
| val pass = encoder.beginRenderPass(GPURenderPassDescriptor(arrayOf( | ||
| GPURenderPassColorAttachment( | ||
| view = gpuContext.getCurrentTexture().createView(), | ||
| clearValue = GPUColorDict(clearColor.r.toDouble(), clearColor.g.toDouble(), clearColor.b.toDouble(), clearColor.a.toDouble()), | ||
| loadOp = GPULoadOp.clear, | ||
| storeOp = GPUStoreOp.store | ||
| ) | ||
| ))) | ||
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| pass.end() | ||
| device.queue.submit(arrayOf(encoder.finish())) | ||
| } | ||
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| override fun cleanup(ctx: KoolContext) { | ||
| // do nothing for now | ||
| } | ||
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| override fun generateKslShader(shader: KslShader, pipeline: Pipeline): ShaderCode { | ||
| logE { "Not yet implemented: WebGpuShaderCode()" } | ||
| return WebGpuShaderCode() | ||
| } | ||
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| override fun generateKslComputeShader(shader: KslComputeShader, pipeline: ComputePipeline): ComputeShaderCode { | ||
| logE { "Not yet implemented: WebGpuComputeShaderCode()" } | ||
| return WebGpuComputeShaderCode() | ||
| } | ||
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| override fun createOffscreenPass2d(parentPass: OffscreenRenderPass2d): OffscreenPass2dImpl { | ||
| return WebGpuOffscreenPass2d(parentPass) | ||
| } | ||
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| override fun createOffscreenPassCube(parentPass: OffscreenRenderPassCube): OffscreenPassCubeImpl { | ||
| return WebGpuOffscreenPassCube(parentPass) | ||
| } | ||
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| override fun uploadTextureToGpu(tex: Texture, data: TextureData) { | ||
| logE { "Not yet implemented: uploadTextureToGpu()" } | ||
| } | ||
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| class WebGpuOffscreenPass2d(val parentPass: OffscreenRenderPass2d) : OffscreenPass2dImpl { | ||
| override val isReverseDepth: Boolean = false | ||
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| override fun applySize(width: Int, height: Int) { } | ||
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| override fun release() { } | ||
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| override fun draw(ctx: KoolContext) { | ||
| logT { "Draw 2d: ${parentPass.name}" } | ||
| } | ||
| } | ||
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| class WebGpuOffscreenPassCube(val parentPass: OffscreenRenderPassCube) : OffscreenPassCubeImpl { | ||
| override val isReverseDepth: Boolean = false | ||
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| override fun applySize(width: Int, height: Int) { } | ||
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| override fun release() { } | ||
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| override fun draw(ctx: KoolContext) { | ||
| logT { "Draw cube: ${parentPass.name}" } | ||
| } | ||
| } | ||
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| class WebGpuShaderCode: ShaderCode { | ||
| override val hash: LongHash = LongHash() | ||
| } | ||
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| class WebGpuComputeShaderCode: ComputeShaderCode { | ||
| override val hash: LongHash = LongHash() | ||
| } | ||
| } |
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