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YashwinderSingh

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About YashwinderSingh

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  1. I have tried using all these below stated rendering states before assigning the pixel shader to the device and in the render loop per frame also but even then there is no effect on the alpha value     _device.SetRenderState(RenderState.AlphaBlendEnable, true);             _device.SetRenderState(RenderState.SourceBlend, Blend.SourceAlpha);             _device.SetRenderState(RenderState.DestinationBlend, Blend.InverseSourceAlpha);             _device.SetTextureStageState(0, TextureStage.ColorOperation, TextureOperation.Modulate);             _device.SetTextureStageState(0, TextureStage.ColorArg1, TextureArgument.Texture);             _device.SetTextureStageState(0, TextureStage.ColorArg2, TextureArgument.TFactor); Can any one please tell whats the proper method of setting alpha value for the texture to change its transperancy. 
  2. I have tried using all these below stated rendering states before assigning the pixel shader to the device and in the render loop per frame also but even then there is no effect on the alpha value     _device.SetRenderState(RenderState.AlphaBlendEnable, true);             _device.SetRenderState(RenderState.SourceBlend, Blend.SourceAlpha);             _device.SetRenderState(RenderState.DestinationBlend, Blend.InverseSourceAlpha);             _device.SetTextureStageState(0, TextureStage.ColorOperation, TextureOperation.Modulate);             _device.SetTextureStageState(0, TextureStage.ColorArg1, TextureArgument.Texture);             _device.SetTextureStageState(0, TextureStage.ColorArg2, TextureArgument.TFactor); Can any one please tell whats the proper method of setting alpha value for the texture to change its transperancy. 
  3. I have created a sample code for the same problem I was facing to set alpha and have given the complete code above
  4. I am trying to set alpha value of color as color.a = 0.2 in my pixel shader but it is not showing any effect. If I set color.r, color.g, color.b then they work fine according to the values set in the pixel shader. Simple pixel shader code is given below that I am using sampler2D ourImage : register(s0);     float4 main(float2 locationInSource : TEXCOORD) : COLOR     {        float4 color = tex2D( ourImage , locationInSource.xy);        color.a = 0.2;        return color;     }   My complete rendering code is as below       using System;using System.Drawing; using System.IO; using System.Runtime.InteropServices; using System.Text; using System.Threading; using System.Windows; using System.Windows.Interop; using SlimDX; using SlimDX.Direct3D9; using Point = System.Windows.Point; namespace AlphaBlendTesting { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { #region Private Variables private Device _device; private VertexBuffer _vertexBuffer; private static VertexDeclaration _vertexDeclaration; private Texture _texture; private Surface _renderTarget; #endregion public MainWindow() { InitializeComponent(); this.Loaded += MainWindow_Loaded; } void MainWindow_Loaded(object sender, RoutedEventArgs e) { InitializeDevice(); InitializeVertices(); ThreadPool.QueueUserWorkItem(delegate { RenderEnvironment(); }); } private void InitializeDevice() { var direct3D = new Direct3D(); var windowHandle = new WindowInteropHelper(this).Handle; var presentParams = new PresentParameters { Windowed = true, BackBufferWidth = (int)SystemParameters.PrimaryScreenWidth, BackBufferHeight = (int)SystemParameters.PrimaryScreenHeight, // Enable Z-Buffer // This is not really needed in this sample but real applications generaly use it EnableAutoDepthStencil = true, AutoDepthStencilFormat = Format.D16, // How to swap backbuffer in front and how many per screen refresh BackBufferCount = 1, SwapEffect = SwapEffect.Copy, BackBufferFormat = direct3D.Adapters[0].CurrentDisplayMode.Format, PresentationInterval = PresentInterval.Default, DeviceWindowHandle = windowHandle }; _device = new Device(direct3D, 0, DeviceType.Hardware, windowHandle, CreateFlags.SoftwareVertexProcessing | CreateFlags.Multithreaded, presentParams); var shaderByteCode = ShaderBytecode.Compile(File.ReadAllBytes(@"EdgeBlenDing.fx"), "main", "ps_2_0", ShaderFlags.None); var pixelShader = new PixelShader(_device, shaderByteCode); _device.PixelShader = pixelShader; } private void InitializeVertices() { _renderTarget = _device.GetRenderTarget(0); var vertexBuffer = new VertexBuffer(_device, 6 * Vertex.SizeBytes, Usage.WriteOnly, VertexFormat.Normal, Pool.Managed); using (DataStream stream = vertexBuffer.Lock(0, 0, LockFlags.None)) { stream.WriteRange(BuildVertexData()); vertexBuffer.Unlock(); } _vertexBuffer = vertexBuffer; //Setting the vertex elements var vertexElems = new[]  { new VertexElement(0, 0, DeclarationType.Float3, DeclarationMethod.Default, DeclarationUsage.Position , 0), new VertexElement(0, 12 , DeclarationType.Float2, DeclarationMethod.Default, DeclarationUsage.TextureCoordinate, 0), VertexElement.VertexDeclarationEnd }; //Declaring the vertex _vertexDeclaration = new VertexDeclaration(_device, vertexElems); SetRenderState(); _texture = Texture.FromFile(_device, @"C:\Users\Public\Pictures\Sample Pictures\Chrysanthemum.jpg"); } private void SetRenderState() { // Turn off culling, so we see the front and back of the triangle _device.SetRenderState(RenderState.CullMode, Cull.None); // Turn off lighting _device.SetRenderState(RenderState.Lighting, false); } private void RenderEnvironment() { while (true) { try { _device.BeginScene(); _device.Clear(ClearFlags.ZBuffer, Color.Blue, 1.0f, 0); _device.SetTexture(0, _texture); _device.SetRenderTarget(0, _renderTarget); _device.VertexDeclaration = _vertexDeclaration; _device.SetStreamSource(0, _vertexBuffer, 0, Vertex.SizeBytes); _device.DrawPrimitives(PrimitiveType.TriangleList, 0, 2); _device.EndScene(); //Show what we draw _device.Present(); } catch (Exception e) { } } } private Vertex[] BuildVertexData() { var bottomLeftVertex = new Point(0, 0); var topLeftVertex = new Point(0, 1); var bottomRightVertex = new Point(1, 0); var topRightVertex = new Point(1, 1); var vertexData = new Vertex[6]; vertexData[0].Position = new Vector3(-1.0f, 1.0f, 0.0f); vertexData[0].TextureCoordinate = new Vector2((float)bottomLeftVertex.X, (float)bottomLeftVertex.Y); vertexData[1].Position = new Vector3(-1.0f, -1.0f, 0.0f); vertexData[1].TextureCoordinate = new Vector2((float)topLeftVertex.X, (float)topLeftVertex.Y); vertexData[2].Position = new Vector3(1.0f, 1.0f, 0.0f); vertexData[2].TextureCoordinate = new Vector2((float)bottomRightVertex.X, (float)bottomRightVertex.Y); vertexData[3].Position = new Vector3(-1.0f, -1.0f, 0.0f); vertexData[3].TextureCoordinate = new Vector2((float)topLeftVertex.X, (float)topLeftVertex.Y); vertexData[4].Position = new Vector3(1.0f, -1.0f, 0.0f); vertexData[4].TextureCoordinate = new Vector2((float)topRightVertex.X, (float)topRightVertex.Y); vertexData[5].Position = new Vector3(1.0f, 1.0f, 0.0f); vertexData[5].TextureCoordinate = new Vector2((float)bottomRightVertex.X, (float)bottomRightVertex.Y); return vertexData; } [StructLayout(LayoutKind.Sequential)] struct Vertex { public Vector3 Position; public Vector2 TextureCoordinate; public static int SizeBytes { get { return Marshal.SizeOf(typeof(Vertex)); } } } } I am unable to figure out why alpha value is not getting set. Any kind of help is appreciated.
  5. [color=#000000][font=Arial,]I have coded a video player using directshow and EVR filter. I am having a problem of slow playback in a machine with configuration:[/font][/color] [color=#000000][font=Arial,]Processor: AMD E-350 1.60 GHz Ram: 2 GB[/font][/color] [color=#000000][font=Arial,]The videos with resolution 1440*1080 or 1920*1080 and above plays fine in windows media player and Media player classic-HC but not the way I am rendering it.[/font][/color] PLayback is smooth in other machines with processors like intel dual core and above. [color=#000000][font=Arial,]I am just adding the evr filter to the graph i have made of the video and playing it. Is there any way to improve the playback quality of the video on this machine. any help is appreciated.[/font][/color]
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