skiko/src/awtMain/kotlin/org/jetbrains/skiko/context/MetalContextHandler.kt [33:52]:
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            surface = Surface.makeFromBackendRenderTarget(
                context!!,
                renderTarget!!,
                SurfaceOrigin.TOP_LEFT,
                SurfaceColorFormat.BGRA_8888,
                ColorSpace.sRGB,
                SurfaceProps(pixelGeometry = layer.pixelGeometry)
            ) ?: throw RenderException("Cannot create surface")

            canvas = surface!!.canvas
        } else {
            renderTarget = null
            surface = null
            canvas = null
        }
    }

    override fun flush() {
        super.flush()
        surface?.flushAndSubmit()
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skiko/src/macosMain/kotlin/org/jetbrains/skiko/context/MetalContextHandler.macos.kt [38:58]:
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            surface = Surface.makeFromBackendRenderTarget(
                context!!,
                renderTarget!!,
                SurfaceOrigin.TOP_LEFT,
                SurfaceColorFormat.BGRA_8888,
                ColorSpace.sRGB,
                SurfaceProps(pixelGeometry = layer.pixelGeometry)
            ) ?: throw RenderException("Cannot create surface")

            canvas = surface!!.canvas
        } else {
            renderTarget = null
            surface = null
            canvas = null
        }
    }

    override fun flush() {
        // TODO: maybe make flush async as in JVM version.
        super.flush()
        surface?.flushAndSubmit()
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