mame/hlsl/downsample.fx
MooglyGuy 5671484fc8
Major D3D and BGFX code refactoring and bug fixes: (#10858) [Ryan Holtz]
* render/bgfx: Improved clearing and blending. Added prescale support. Fixes MT07586, MT07587, MT08084.
* render/bgfx: Fixed blend and tint handling. (Fixes Github #1953).
* render/bgfx/blendreader.cpp: Support non-separated blend mode specification for BGFX effects.
* render/bgfx: Reworked how horizontally-padded screen textures are handled. Likely fixes MT08512 and MT08505.
* render/bgfx: Ensure that a texture's width margin is updated in all cases.
* render/d3d/d3dhlsl.cpp: Fixed tinting in HLSL post-processing mode.
* render/d3d/d3dhlsl.cpp: Avoid most redundant state-setting calls. Reduces D3D API calls by about 90% on fruit machine drivers.
* render/d3d/d3dhlsl.cpp: Assign SourceDims and QuadDims uniforms to only those effects that use them.
* machine/laserdsc.cpp: Always add video quad to screen container, adjust tint based on m_videoenable instead.
2023-01-29 03:59:25 +11:00

115 lines
3.3 KiB
HLSL

// license:BSD-3-Clause
// copyright-holders:Ryan Holtz,ImJezze
//-----------------------------------------------------------------------------
// Downsample Effect
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Sampler Definitions
//-----------------------------------------------------------------------------
texture DiffuseTexture;
sampler DiffuseSampler = sampler_state
{
Texture = <DiffuseTexture>;
MipFilter = LINEAR;
MinFilter = LINEAR;
MagFilter = LINEAR;
AddressU = CLAMP;
AddressV = CLAMP;
AddressW = CLAMP;
};
//-----------------------------------------------------------------------------
// Vertex Definitions
//-----------------------------------------------------------------------------
struct VS_OUTPUT
{
float4 Position : POSITION;
float4 Color : COLOR0;
float4 TexCoord01 : TEXCOORD0;
float4 TexCoord23 : TEXCOORD1;
};
struct VS_INPUT
{
float4 Position : POSITION;
float4 Color : COLOR0;
float2 TexCoord : TEXCOORD0;
};
struct PS_INPUT
{
float4 Color : COLOR0;
float4 TexCoord01 : TEXCOORD0;
float4 TexCoord23 : TEXCOORD1;
};
//-----------------------------------------------------------------------------
// Downsample Vertex Shader
//-----------------------------------------------------------------------------
uniform float2 ScreenDims;
uniform float2 TargetDims;
uniform float2 QuadDims;
static const float2 Coord0Offset = float2(-0.5f, -0.5f);
static const float2 Coord1Offset = float2( 0.5f, -0.5f);
static const float2 Coord2Offset = float2(-0.5f, 0.5f);
static const float2 Coord3Offset = float2( 0.5f, 0.5f);
VS_OUTPUT vs_main(VS_INPUT Input)
{
VS_OUTPUT Output = (VS_OUTPUT)0;
float2 HalfTargetTexelDims = 0.5f / TargetDims;
Output.Position = float4(Input.Position.xyz, 1.0f);
Output.Position.xy /= ScreenDims;
Output.Position.y = 1.0f - Output.Position.y; // flip y
Output.Position.xy -= 0.5f; // center
Output.Position.xy *= 2.0f; // zoom
Output.Color = Input.Color;
float2 TexCoord = Input.TexCoord;
TexCoord += 0.5f / TargetDims; // half texel offset correction (DX9)
Output.TexCoord01.xy = TexCoord + Coord0Offset * HalfTargetTexelDims;
Output.TexCoord01.zw = TexCoord + Coord1Offset * HalfTargetTexelDims;
Output.TexCoord23.xy = TexCoord + Coord2Offset * HalfTargetTexelDims;
Output.TexCoord23.zw = TexCoord + Coord3Offset * HalfTargetTexelDims;
return Output;
}
//-----------------------------------------------------------------------------
// Downsample Pixel Shader
//-----------------------------------------------------------------------------
float4 ps_main(PS_INPUT Input) : COLOR
{
float4 texel0 = tex2D(DiffuseSampler, Input.TexCoord01.xy);
float4 texel1 = tex2D(DiffuseSampler, Input.TexCoord01.zw);
float4 texel2 = tex2D(DiffuseSampler, Input.TexCoord23.xy);
float4 texel3 = tex2D(DiffuseSampler, Input.TexCoord23.zw);
return (texel0 + texel1 + texel2 + texel3) * 0.25;
}
//-----------------------------------------------------------------------------
// Downsample Technique
//-----------------------------------------------------------------------------
technique DefaultTechnique
{
pass Pass0
{
Lighting = FALSE;
VertexShader = compile vs_2_0 vs_main();
PixelShader = compile ps_2_0 ps_main();
}
}