Sign in to follow this  
Ripiz

DX11 [C++, DX11] How to get texture size?

Recommended Posts

Ripiz    539
Hello. I load my texture using this code:[code] D3DX11CreateTextureFromFileA(device, sFilename, 0, 0, &textureResource, 0);

D3D11_SHADER_RESOURCE_VIEW_DESC resourceDesc;
resourceDesc.Format = DXGI_FORMAT_UNKNOWN;
resourceDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
resourceDesc.Texture2D.MostDetailedMip = 0;
resourceDesc.Texture2D.MipLevels = -1;
device->CreateShaderResourceView(textureResource, &resourceDesc, &shaderTextureResource);[/code]

But I can't seem figure how to get texture size/resolution which I need for interface rendering. Can anyone help please? Thank you in advance.

Share this post


Link to post
Share on other sites
e3d_ALiVE    209
[quote name='Ripiz' timestamp='1306999537' post='4818561']
Hello. I load my texture using this code:[code] D3DX11CreateTextureFromFileA(device, sFilename, 0, 0, &textureResource, 0);

D3D11_SHADER_RESOURCE_VIEW_DESC resourceDesc;
resourceDesc.Format = DXGI_FORMAT_UNKNOWN;
resourceDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
resourceDesc.Texture2D.MostDetailedMip = 0;
resourceDesc.Texture2D.MipLevels = -1;
device->CreateShaderResourceView(textureResource, &resourceDesc, &shaderTextureResource);[/code]

But I can't seem figure how to get texture size/resolution which I need for interface rendering. Can anyone help please? Thank you in advance.
[/quote]

[list][*]you have to query ID3D11Texture2D interface from shaderTextureResource,then you have to get description from it with GetDesc[*]if you don't want or don't know how to query, then u may just call GetDesc from textureResource, it will give you D3D11_TEXTURE2D_DESC structure with all the fields(w,h format e.t.c.) that you need[*]you can also call D3DX11GetImageInfoFromFile to retrieve information about the file[/list]

Share this post


Link to post
Share on other sites
Ripiz    539
[quote name='e3d_ALiVE' timestamp='1307006162' post='4818583']
you have to query ID3D11Texture2D interface from shaderTextureResource,then you have to get description from it with GetDesc
[/quote]
Doesn't work, pointer remains NULL.

[quote name='e3d_ALiVE' timestamp='1307006162' post='4818583']
if you don't want or don't know how to query, then u may just call GetDesc from textureResource, it will give you D3D11_TEXTURE2D_DESC structure with all the fields(w,h format e.t.c.) that you need
[/quote]
textureResource doesn't have GetDesc method, however shaderTextureResource does have it, but it doesn't return information I need

[quote name='e3d_ALiVE' timestamp='1307006162' post='4818583']
you can also call D3DX11GetImageInfoFromFile to retrieve information about the file
[/quote]
I though that'll be somewhat slow to open file extra time, so I didn't do it.

However, based on your suggestions I managed to Query interface from textureResource and it worked correctly, thank you.


[code]
ID3D11Texture2D *pTextureInterface = 0;
textureResource->QueryInterface<ID3D11Texture2D>(&pTextureInterface);
D3D11_TEXTURE2D_DESC desc;
pTextureInterface->GetDesc(&desc);[/code]

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

  • Partner Spotlight

  • Similar Content

    • By noodleBowl
      I was thinking about how to render multiple objects. Things like sprites, truck models, plane models, boats models, etc. And I'm not too sure about this process
      Let's say I have a vector of Models objects
      class Model {  Matrix4 modelMat;  VertexData vertices;  Texture texture;  Shader shader; }; Since each model has is own model matrix, as all models should, does this mean I now need to have 1 draw call per model?
      Because each model that needs to be drawn could change the MVP matrix used by the bound vertex shader. Meaning I have to keep updating/mapping the constant buffer my MVP matrix is stored in, which is used by the vertex shader
      Am I thinking about all of this wrong? Isn't this horribly inefficient?
    • By RubenRS
      How do i open an image to use it as Texture2D information without D3DX11CreateShaderResourceViewFromFile? And how it works for different formats like (JPG, PNG, BMP, DDS,  etc.)?
      I have an (512 x 512) image with font letters, also i have the position and texcoord of every letter. The main idea is that i want to obtain the image pixel info, use the position and texcoords to create a new texture with one letter and render it. Or am I wrong in something?
    • By thmfrnk
      Hey,
      I found a very interesting blog post here: https://bartwronski.com/2017/04/13/cull-that-cone/
      However, I didn't really got how to use his "TestConeVsSphere" test in 3D (last piece of code on his post). I have the frustumCorners of a 2D Tile cell in ViewSpace and my 3D Cone Origin and Direction, so where to place the "testSphere"? I thought about to also move the Cone into viewspace and put the sphere to the Center of the Cell with the radius of half-cellsize, however what about depth? A sphere does not have inf depth?
      I am missing anything? Any Ideas?
      Thx, Thomas
    • By Modymek
      hi all
      I want to enable and disable shader in MPCH Media player Classic
      the MPCH have shader option using HLSL shaders
      I want the shader to read each file extension before it plays the file
      so if the video file name is video.GR.Mp4 it will play it in Grayscale shader 
      if it is not and standard file name Video.Mp4 without GR. unique extension so it plays standard without shader or end the shader
      here is the shader I have for grayscale
      // $MinimumShaderProfile: ps_2_0
      sampler s0 : register(s0);
      float4 main(float2 tex : TEXCOORD0) : COLOR {
          float c0 = dot(tex2D(s0, tex), float4(0.299, 0.587, 0.114, 0));
          return c0;
      }
       
      I want to add if or block stantement or bloean to detect file name before it call the shader in order to go to the procedure or disable it or goto end direct without it
       
      any thoughts or help
    • By noodleBowl
      I've gotten to part in my DirectX 11 project where I need to pass the MVP matrices to my vertex shader. And I'm a little lost when it comes to the use of the constant buffer with the vertex shader
      I understand I need to set up the constant buffer just like any other buffer:
      1. Create a buffer description with the D3D11_BIND_CONSTANT_BUFFER flag 2. Map my matrix data into the constant buffer 3. Use VSSetConstantBuffers to actually use the buffer But I get lost at the VertexShader part, how does my vertex shader know to use this constant buffer when we get to the shader side of things
      In the example I'm following I see they have this as their vertex shader, but I don't understand how the shader knows to use the MatrixBuffer cbuffer. They just use the members directly. What if there was multiple cbuffer declarations like the Microsoft documentation says you could have?
      //Inside vertex shader cbuffer MatrixBuffer { matrix worldMatrix; matrix viewMatrix; matrix projectionMatrix; }; struct VertexInputType { float4 position : POSITION; float4 color : COLOR; }; struct PixelInputType { float4 position : SV_POSITION; float4 color : COLOR; }; PixelInputType ColorVertexShader(VertexInputType input) { PixelInputType output; // Change the position vector to be 4 units for proper matrix calculations. input.position.w = 1.0f; // Calculate the position of the vertex against the world, view, and projection matrices. output.position = mul(input.position, worldMatrix); output.position = mul(output.position, viewMatrix); output.position = mul(output.position, projectionMatrix); // Store the input color for the pixel shader to use. output.color = input.color; return output; }  
  • Popular Now