mirror of
https://github.com/italicsjenga/slang-shaders.git
synced 2024-11-30 11:21:32 +11:00
76 lines
2.5 KiB
Plaintext
76 lines
2.5 KiB
Plaintext
#version 450
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// license:BSD-3-Clause
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// copyright-holders:Ryan Holtz,ImJezze
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//-----------------------------------------------------------------------------
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// Defocus Effect
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//-----------------------------------------------------------------------------
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layout(push_constant) uniform Push
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{
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vec4 SourceSize;
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vec4 OriginalSize;
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vec4 OutputSize;
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uint FrameCount;
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vec4 FinalViewportSize;
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} params;
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#include "mame_parameters.inc"
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#pragma stage vertex
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layout(location = 0) in vec4 Position;
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layout(location = 1) in vec2 TexCoord;
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layout(location = 0) out vec2 v_texcoord0;
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void main()
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{
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gl_Position = global.MVP * Position;
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v_texcoord0 = TexCoord;
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}
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#pragma stage fragment
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layout(location = 0) in vec2 v_texcoord0;
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layout(location = 0) out vec4 FragColor;
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layout(set = 0, binding = 2) uniform sampler2D Source;
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#define s_tex Source
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#define v_color0 vec4(1.,1.,1.,1.)
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vec4 u_defocus = vec4(global.defocus_x, global.defocus_y, 0., 0.);
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void main()
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{
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// previously this pass was applied two times with offsets of 0.25, 0.5, 0.75, 1.0
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// now this pass is applied only once with offsets of 0.25, 0.55, 1.0, 1.6 to achieve the same appearance as before till a maximum defocus of 2.0
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// 0.075x² + 0.225x + 0.25
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const vec2 Coord1Offset = vec2(-1.60, 0.25);
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const vec2 Coord2Offset = vec2(-1.00, -0.55);
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const vec2 Coord3Offset = vec2(-0.55, 1.00);
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const vec2 Coord4Offset = vec2(-0.25, -1.60);
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const vec2 Coord5Offset = vec2( 0.25, 1.60);
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const vec2 Coord6Offset = vec2( 0.55, -1.00);
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const vec2 Coord7Offset = vec2( 1.00, 0.55);
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const vec2 Coord8Offset = vec2( 1.60, -0.25);
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// imaginary texel dimensions independed from source and target dimension
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vec2 TexelDims = vec2(1.0 / 1024.0);
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vec2 DefocusTexelDims = u_defocus.xy * TexelDims.xy;
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vec4 d0 = texture(s_tex, v_texcoord0);
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vec4 d1 = texture(s_tex, v_texcoord0 + Coord1Offset * DefocusTexelDims);
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vec4 d2 = texture(s_tex, v_texcoord0 + Coord2Offset * DefocusTexelDims);
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vec4 d3 = texture(s_tex, v_texcoord0 + Coord3Offset * DefocusTexelDims);
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vec4 d4 = texture(s_tex, v_texcoord0 + Coord4Offset * DefocusTexelDims);
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vec4 d5 = texture(s_tex, v_texcoord0 + Coord5Offset * DefocusTexelDims);
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vec4 d6 = texture(s_tex, v_texcoord0 + Coord6Offset * DefocusTexelDims);
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vec4 d7 = texture(s_tex, v_texcoord0 + Coord7Offset * DefocusTexelDims);
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vec4 d8 = texture(s_tex, v_texcoord0 + Coord8Offset * DefocusTexelDims);
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vec4 blurred = (d0 + d1 + d2 + d3 + d4 + d5 + d6 + d7 + d8) / 9.0;
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blurred.a = blurred.a + d0.a;
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FragColor = blurred * v_color0;
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}
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