DX11/c++ loading Textures and using in shader

category: code [glöplog]

Hi,

iam a little lost, again...

Iam trying to load a texture and then access it in the pixel shader and Display/Use the Texture.

On c++ iam using the WICTexture-Loader and loading a Texture seams to be ok.

Code:


// Texture Loader
	ID3D11ShaderResourceView *Texture=NULL;
	/*HRESULT CreateWICTextureFromFile(
		_In_ ID3D11Device* d3dDevice,
		_In_opt_ ID3D11DeviceContext* d3dContext,
		_In_z_ const wchar_t* szFileName,
		_Out_opt_ ID3D11Resource** texture,
		_Out_opt_ ID3D11ShaderResourceView** textureView,
		_In_ size_t maxsize = 0
		);*/
	hr = CreateWICTextureFromFile(g_d3dDevice, NULL,  L"texture.bmp", NULL, &Texture, 4096);
	if (FAILED(hr)) return false; 
	
	/*void PSSetShaderResources(
		[in]           UINT                            StartSlot,
		[in]           UINT                            NumViews,
		[in, optional] ID3D11ShaderResourceView *const *ppShaderResourceViews
		);*/

	//g_d3dDevice->GetImmediateContext(&g_d3dDeviceContext);
	g_d3dDeviceContext->PSSetShaderResources(0, 1, &Texture); // binding to t0
	Texture->Release();

But how to i access the Texture on the Pixel Shader?

The Texture is a Font , and i want to use it to display some text.

How can i access a Pixel in the Texture?

Code:


Texture2D myTexture0 : register(t0);
//Texture2D myTexture1 : register(t1);

struct PS_IN {
	float4 pos : SV_POSITION;
	//float4 k : LOLIMASEMANTIC;
	float3 color : COLOR;
};

struct PS_OUT {
	float4 color : COLOR;
};



float4 SimplePixelShader(PS_IN input) : SV_Target { 
	PS_OUT output;



return (float4)output;
}

Any Idear ? :-)

added on the 2015-12-16 22:21:49 by nebulus

Where are your vertices?
Do you have texture coordinates?

added on the 2015-12-16 22:29:52 by Gargaj

you'll need to call Sample() on your texture object. and you should also provide a SamplerState:

SamplerState samplerLinear : register( s0 );

in your SimplePixelshader just add:

float4 output.color = myTexture0.Sample( samplerLinear, envUV).rgb;

added on the 2015-12-17 08:13:41 by arm1n

whoops, mistake: you should omit the ".rgb" in my previous post.

To create a sampler state look into ID3D11Device::CreateSamplerState, D3D11_SAMPLER_DESC and ID3D11DeviceContext::PSSetSamplers().

cheers.

added on the 2015-12-17 08:17:01 by arm1n

Code:


float4 SimplePixelShader(PS_IN input) : SV_Target
{ 
	PS_OUT output;

        output.color = myTexture0.Sample( samplerLinear, envUV);

        return output.color;
}

added on the 2015-12-17 08:19:51 by arm1n

You're clearly not using PS_OUT for anything good either, just get rid of it.

added on the 2015-12-17 10:09:21 by kusma

Okay i updatet my code to:

Code:


	// Texture Loader
	ID3D11ShaderResourceView *Texture=NULL;

	hr = CreateWICTextureFromFile(g_d3dDevice, NULL,  L"texture.bmp", NULL, &Texture, 4096);
	if (FAILED(hr)) return false; 
	
	g_d3dDeviceContext->PSSetShaderResources(0, 1, &Texture); // binding to t0
	Texture->Release();

	//Create Sampler State
	D3D11_SAMPLER_DESC sd;
	ZeroMemory(&sd, sizeof(D3D11_SAMPLER_DESC));
	sd.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
	sd.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
	sd.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
	sd.ComparisonFunc = D3D11_COMPARISON_NEVER;
	sd.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
	sd.MaxLOD = D3D11_FLOAT32_MAX;
	ID3D11SamplerState *mSampler=NULL;
	g_d3dDevice->CreateSamplerState(&sd, &mSampler);
	g_d3dDeviceContext->PSSetSamplers(0,1,&mSampler); // binding to s0
	mSampler->Release();

and

Code:



SamplerState samplerLinear : register(s0);
Texture2D myTexture0 : register(t0);
//Texture2D myTexture1 : register(t1);


struct PS_IN {
	float4 pos : SV_POSITION;
	//float4 k : LOLIMASEMANTIC;
	float3 color : COLOR;
};

struct PS_OUT {
	float4 color : COLOR;
};

float4 SimplePixelShader(PS_IN input) : SV_Target { 
	PS_OUT output;
	output.color = myTexture0.Sample(samplerLinear, float2(0,1));
return (float4)output;

The Result is a white Box... No Texture :-(

added on the 2015-12-17 12:09:00 by nebulus

Okay, now its working... :-)

Code:


output.color = myTexture0.Sample(samplerLinear, float2(input.pos.r/512,input.pos.g/512));

Did the Magic ... :-))))

added on the 2015-12-17 12:23:55 by nebulus

ehm yes, texture coords need to vary accross the triangle to see something you know ;)

added on the 2015-12-17 12:28:10 by arm1n

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DX11/c++ loading Textures and using in shader

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