Building a SlimDX MiniTriangle sample with Direct3D11 and IronPython

posted in Washu's Journal

Published September 14, 2014

I generally don't post huge code dumps, mainly because I find them more annoying and less helpful than some books/authors might. But you know, I've been playing with IronPython/SlimDX recently and decided to do up another SlimDX Sample (demonstrating DX11), except in IronPython this time. This will be in the SlimDX samples sometime soon!

import clr  clr.AddReference('System.Windows.Forms')  clr.AddReference('System.Drawing')  clr.AddReference('SlimDX')from System import *  from System.Drawing import Size  from System.Windows.Forms import Form, Application, MessageBox, FormBorderStyle  from SlimDX import *  from SlimDX.Direct3D11 import *  from SlimDX.DXGI import SwapChainDescription, SwapChainFlags, ModeDescription, SampleDescription, Usage, SwapEffect, Format, PresentFlags, Factory, WindowAssociationFlags  from SlimDX.D3DCompiler import *  from SlimDX.Windows import MessagePumpclass GameObject:      def Render(self):        pass    def Tick(self):        passclass GraphicsDevice(IDisposable):      Context = property(lambda self: self.context)    Device = property(lambda self: self.device)    SwapChain = property(lambda self: self.swapChain)    def __init__(self, control, fullscreen):        self.fullscreen = fullscreen        self.control = control        control.Resize += lambda sender, args: self.Resize()        swapChainDesc = self.CreateSwapChainDescription();        success,self.device,self.swapChain = Device.CreateWithSwapChain(DriverType.Hardware, DeviceCreationFlags.None, Array[FeatureLevel]([FeatureLevel.Level_11_0, FeatureLevel.Level_10_1, FeatureLevel.Level_10_0]), swapChainDesc)        self.context = self.Device.ImmediateContext        with self.swapChain.GetParent[Factory]() as factory:            factory.SetWindowAssociation(self.control.Handle, WindowAssociationFlags.IgnoreAll)        with Resource.FromSwapChain[Texture2D](self.swapChain, 0) as backBuffer:            self.backBufferRTV = RenderTargetView(self.Device, backBuffer)        self.Resize()            def CreateSwapChainDescription(self):        swapChainDesc = SwapChainDescription()        swapChainDesc.IsWindowed = not self.fullscreen        swapChainDesc.BufferCount = 1        swapChainDesc.ModeDescription = ModeDescription(self.control.ClientSize.Width, self.control.ClientSize.Height, Rational(60, 1), Format.R8G8B8A8_UNorm)        swapChainDesc.Flags = SwapChainFlags.None        swapChainDesc.SwapEffect = SwapEffect.Discard        swapChainDesc.Usage = Usage.RenderTargetOutput        swapChainDesc.SampleDescription = SampleDescription(1, 0)        swapChainDesc.OutputHandle = self.control.Handle        return swapChainDesc    def Resize(self):        self.Context.ClearState()        self.backBufferRTV.Dispose()        self.swapChain.ResizeBuffers(1, self.control.ClientSize.Width, self.control.ClientSize.Height, Format.R8G8B8A8_UNorm, SwapChainFlags.None)        with Resource.FromSwapChain[Texture2D](self.swapChain, 0) as backBuffer:            self.backBufferRTV = RenderTargetView(self.Device, backBuffer)        self.Context.Rasterizer.SetViewports(Viewport(0, 0, self.control.ClientSize.Width, self.control.ClientSize.Height, 0.0, 1.0))    def BeginRender(self):        self.Context.ClearRenderTargetView(self.backBufferRTV, Color4(0, 0, 0, 0))        self.Context.OutputMerger.SetTargets(self.backBufferRTV)    def EndRender(self):        self.swapChain.Present(0, PresentFlags.None)    def Dispose(self):        self.backBufferRTV.Dispose()        self.swapChain.Dispose()        self.device.Dispose()class TriangleObject(GameObject):      def __init__(self, game):        self.game = game        device = game.GraphicsDevice.Device        context = game.GraphicsDevice.Context        err = clr.Reference[str]()        with ShaderBytecode.CompileFromFile("SimpleTriangle10.fx", "fx_5_0", ShaderFlags.None, EffectFlags.None, None, None, err) as shaderByteCode:            self.effect = Effect(device, shaderByteCode)        shaderTechnique = self.effect.GetTechniqueByIndex(0)        self.shaderPass = shaderTechnique.GetPassByIndex(0)        sig = self.shaderPass.Description.Signature        self.inputLayout = InputLayout(device, sig, Array[InputElement]([InputElement("POSITION", 0, Format.R32G32B32A32_Float, 0, 0), InputElement("COLOR", 0, Format.R32G32B32A32_Float, 16, 0)]))        bufferDesc = BufferDescription(3 * 32, ResourceUsage.Dynamic, BindFlags.VertexBuffer, CpuAccessFlags.Write, ResourceOptionFlags.None, 0)        self.vertexBuffer = Buffer(device, bufferDesc)        stream = context.MapSubresource(self.vertexBuffer, 0, 3 * 32, MapMode.WriteDiscard, MapFlags.None).Data        data = Array[Vector4]([            Vector4(0.0, 0.5, 0.5, 1.0), Vector4(1.0, 0.0, 0.0, 1.0),            Vector4(0.5, -0.5, 0.5, 1.0), Vector4(0.0, 1.0, 0.0, 1.0),            Vector4(-0.5, -0.5, 0.5, 1.0), Vector4(0.0, 0.0, 1.0, 1.0)        ])        stream.WriteRange(data)        context.UnmapSubresource(self.vertexBuffer, 0)    def Render(self):        context = self.game.GraphicsDevice.Context        context.InputAssembler.InputLayout = self.inputLayout        context.InputAssembler.PrimitiveTopology = PrimitiveTopology.TriangleList        context.InputAssembler.SetVertexBuffers(0, VertexBufferBinding(self.vertexBuffer, 32, 0))        self.shaderPass.Apply(context)        context.Draw(3, 0)    def Dispose(self):        self.effect.Dispose()        self.inputLayout.Dispose()        self.vertexBuffer.Dispose()class Game(IDisposable):      GraphicsDevice = property(lambda self: self.graphicsDevice)    def __init__(self, width, height, fullscreen = False):        self.fullscreen = fullscreen        self.form = GameForm(width, height, fullscreen)        self.form.Visible = True        self.graphicsDevice = GraphicsDevice(self.form, self.fullscreen)        self.gameObjects = [TriangleObject(self)]    def Run(self):        Application.Idle += self.OnIdle        Application.Run(self.form)    def OnIdle(self, ea, sender):        while MessagePump.IsApplicationIdle:            self.Update()            self.Render()    def Update(self):        for i in self.gameObjects:            i.Tick()    def Render(self):        self.GraphicsDevice.BeginRender()        for i in self.gameObjects:            i.Render()        self.GraphicsDevice.EndRender()    def Dispose(self):        self.GraphicsDevice.Dispose()        for i in self.gameObjects:            if 'Dispose' in dir(i):                i.Dispose()        self.form.Dispose(True)class GameForm(Form):      def __init__(self, width, height, fullscreen):        self.ClientSize = Size(width, height)        if fullscreen:            self.FormBorderStyle = FormBorderStyle.Noneif __name__ == "__main__":      try:        with Game(640, 480) as game:            game.Run()    except Exception as e:        MessageBox.Show(e.ToString())

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