Change shader intensity

[ds1-e]

Hey, as title says.

How can i add possibility to change color intensity manual? To make it darker or brighter.

//
// blackwhite.fx
//

texture screenSource;
 
sampler TextureSampler = sampler_state
{
    Texture = <screenSource>;
};

float4 PixelShaderFunction(float2 TextureCoordinate : TEXCOORD0) : COLOR0
{
    float4 color = tex2D(TextureSampler, TextureCoordinate);
 
    float value = (color.r + color.g + color.b) / 3; 
    color.r = value;
    color.g = value;
    color.b = value;
 
    return color;
}
 
technique BlackAndWhite
{
    pass Pass1
    {
        PixelShader = compile ps_2_0 PixelShaderFunction();
    }
}

 

[AlexRazor]

Probably here:

 float value = (color.r + color.g + color.b) / 3; 

You should replace 3 with var and set this var value from your script.

[Pirulax]

//
// blackwhite.fx
//

texture screenSource;
float fIntesity; // the value set must be between in the range [-1, 1], so set it like this: urValue / 255, ex.: dxSetShaderValue(thisShader, "fIntesity", 128/255); this will make the image brighter.
 
sampler TextureSampler = sampler_state
{
    Texture = <screenSource>;
};

float4 PixelShaderFunction(float2 TextureCoordinate : TEXCOORD0) : COLOR0
{
    float4 color = tex2D(TextureSampler, TextureCoordinate);
    return float4((color.r + color.g + color.b) / 3 + fIntesity);
}
 
technique BlackAndWhite
{
    pass Pass1
    {
        PixelShader = compile ps_2_0 PixelShaderFunction();
    }
}

 

[ds1-e]

18 hours ago, Pirulax said:

//
// blackwhite.fx
//

texture screenSource;
float fIntesity; // the value set must be between in the range [-1, 1], so set it like this: urValue / 255, ex.: dxSetShaderValue(thisShader, "fIntesity", 128/255); this will make the image brighter.
 
sampler TextureSampler = sampler_state
{
    Texture = <screenSource>;
};

float4 PixelShaderFunction(float2 TextureCoordinate : TEXCOORD0) : COLOR0
{
    float4 color = tex2D(TextureSampler, TextureCoordinate);
    return float4((color.r + color.g + color.b) / 3 + fIntesity);
}
 
technique BlackAndWhite
{
    pass Pass1
    {
        PixelShader = compile ps_2_0 PixelShaderFunction();
    }
}

 

local screenX, screenY = guiGetScreenSize()
local screenSource = dxCreateScreenSource(screenX, screenY)

addEventHandler("onClientResourceStart", getResourceRootElement(getThisResource()),
function()
    if getVersion ().sortable < "1.1.0" then
        outputChatBox("Resource is not compatible with this client.")
        return
	else
		blackWhiteShader, blackWhiteTec = dxCreateShader("fx/blackwhite.fx")
		
        if (not blackWhiteShader) then
            outputChatBox("Could not create shader. Please use debugscript 3.")
		else
			outputChatBox("shader " .. blackWhiteTec .. " was started.")
        end
    end
end)

addEventHandler("onClientPreRender", getRootElement(),
function()
    if (blackWhiteShader) then
        dxUpdateScreenSource(screenSource)     
        dxSetShaderValue(blackWhiteShader, "screenSource", screenSource)
        dxSetShaderValue(blackWhiteShader, "fIntesity", 128/255)
        dxDrawImage(0, 0, screenX, screenY, blackWhiteShader)
    end
end)

Thanks for answer, after doing changes, it shows an error.

 

[Pirulax]

That was helpful.

What's the error?

[ds1-e]

Sorry, forget to add it to code, i did not slept today.

[2019-02-24 11:01:00] WARNING: bw\blackwhite.lua:10: blackwhite.fx(16,12): error X3014: incorrect number of arguments to numeric-type constructor @ 'dxCreateShader' [fx/blackwhite.fx]

 

Edited February 24, 2019 by majqq

[ds1-e]

bump

[TRtam]

Maybe this (Just change the intensity to whatever you want):

//
// blackwhite.fx
//

texture screenSource;

float intensity = 0.5;
 
sampler TextureSampler = sampler_state
{
    Texture = <screenSource>;
};

float4 PixelShaderFunction(float2 TextureCoordinate : TEXCOORD0) : COLOR0
{
    float4 color = tex2D(TextureSampler, TextureCoordinate);
 
    float value = (color.r + color.g + color.b) / 3 * intensity; 
    color.r = value;
    color.g = value;
    color.b = value;
 
    return color;
}
 
technique BlackAndWhite
{
    pass Pass1
    {
        PixelShader = compile ps_2_0 PixelShaderFunction();
    }
}

Or this:

//
// blackwhite.fx
//

texture screenSource;

float intensity = 0;
 
sampler TextureSampler = sampler_state
{
    Texture = <screenSource>;
};

float4 PixelShaderFunction(float2 TextureCoordinate : TEXCOORD0) : COLOR0
{
    float4 color = tex2D(TextureSampler, TextureCoordinate);
 
    float value = (color.r + color.g + color.b) / 3; 
    color.r = value;
    color.g = value;
    color.b = value;
 
    return color * intensity;
}
 
technique BlackAndWhite
{
    pass Pass1
    {
        PixelShader = compile ps_2_0 PixelShaderFunction();
    }
}

 

Edited February 27, 2019 by TRtam
xd