slang-shaders/handheld/shaders/mgba/ags001.slang

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#version 450
/*
AGS-001 shader
A pristine recreation of the illuminated Game Boy Advance SP
Author: endrift
License: MPL 2.0
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
layout(std140, set = 0, binding = 0) uniform UBO
{
mat4 MVP;
vec4 OutputSize;
vec4 OriginalSize;
vec4 SourceSize;
} global;
#pragma stage vertex
layout(location = 0) in vec4 Position;
layout(location = 1) in vec2 TexCoord;
layout(location = 0) out vec2 vTexCoord;
void main()
{
gl_Position = global.MVP * Position;
vTexCoord = TexCoord;
}
#pragma stage fragment
layout(location = 0) in vec2 vTexCoord;
layout(location = 0) out vec4 FragColor;
layout(set = 0, binding = 2) uniform sampler2D Source;
void main()
{
vec4 color = texture(Source, vTexCoord);
vec3 arrayX[4];
arrayX[0] = vec3(1.0, 0.2, 0.2);
arrayX[1] = vec3(0.2, 1.0, 0.2);
arrayX[2] = vec3(0.2, 0.2, 1.0);
arrayX[3] = vec3(0.4, 0.4, 0.4);
vec3 arrayY[4];
arrayY[0] = vec3(1.0, 1.0, 1.0);
arrayY[1] = vec3(1.0, 1.0, 1.0);
arrayY[2] = vec3(1.0, 1.0, 1.0);
arrayY[3] = vec3(0.9, 0.9, 0.9);
color.rgb = pow(color.rgb, vec3(1.6, 1.6, 1.6));
color.rgb *= arrayX[int(mod(vTexCoord.s * global.SourceSize.x * 4.0, 4.0))];
color.rgb *= arrayY[int(mod(vTexCoord.t * global.SourceSize.y * 4.0, 4.0))];
color.a = 0.8;
FragColor = color;
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}