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// license:BSD-3-Clause
// copyright-holders:Ryan Holtz
//-----------------------------------------------------------------------------
// Prescale Effect
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Sampler Definitions
//-----------------------------------------------------------------------------
texture Diffuse;
sampler DiffuseSampler = sampler_state
{
Texture = <Diffuse>;
MipFilter = NONE;
MinFilter = NONE;
MagFilter = NONE;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
//-----------------------------------------------------------------------------
// Vertex Definitions
//-----------------------------------------------------------------------------
struct VS_OUTPUT
{
float4 Position : POSITION;
float2 TexCoord : TEXCOORD0;
};
struct VS_INPUT
{
float4 Position : POSITION;
float4 Color : COLOR0;
float2 TexCoord : TEXCOORD0;
float2 Unused : TEXCOORD1;
};
struct PS_INPUT
{
float2 TexCoord : TEXCOORD0;
};
//-----------------------------------------------------------------------------
// Prescale Vertex Shader
//-----------------------------------------------------------------------------
uniform float2 ScreenDims;
VS_OUTPUT vs_main(VS_INPUT Input)
{
VS_OUTPUT Output = (VS_OUTPUT)0;
Output.Position = float4(Input.Position.xyz, 1.0f);
Output.Position.xy /= ScreenDims;
Output.Position.y = 1.0f - Output.Position.y;
Output.Position.xy -= 0.5f;
Output.Position *= float4(2.0f, 2.0f, 1.0f, 1.0f);
Output.TexCoord = Input.TexCoord + 0.5f / ScreenDims;
return Output;
}
//-----------------------------------------------------------------------------
// Prescale Pixel Shader
//-----------------------------------------------------------------------------
float4 ps_main(PS_INPUT Input) : COLOR
{
return tex2D(DiffuseSampler, Input.TexCoord);
}
//-----------------------------------------------------------------------------
// Prescale Technique
//-----------------------------------------------------------------------------
technique DefaultTechnique
{
pass Pass0
{
Lighting = FALSE;
VertexShader = compile vs_3_0 vs_main();
PixelShader = compile ps_3_0 ps_main();
}
}
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