mirror of
https://github.com/italicsjenga/slang-shaders.git
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139 lines
6.8 KiB
Plaintext
139 lines
6.8 KiB
Plaintext
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#version 450
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///////////////////////////////////////////////////////////////////////////
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// //
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// LCD Shader v0.0.1 //
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// //
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// Copyright (C) 2013 Harlequin : unknown92835@gmail.com //
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// //
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// This program is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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// //
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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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float cell_scale, triad_color_0_r, triad_color_0_g, triad_color_0_b,
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triad_color_1_r, triad_color_1_g, triad_color_1_b, triad_color_2_r,
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triad_color_2_g, triad_color_2_b;
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} params;
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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//config //
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#pragma parameter cell_scale "LCD Cell Scale" 1.0 1.0 5.0 1.0
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#pragma parameter triad_color_0_r "LCD Red Triad Color R" 1.0 0.0 1.0 0.1
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#pragma parameter triad_color_0_g "LCD Red Triad Color G" 0.0 0.0 1.0 0.1
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#pragma parameter triad_color_0_b "LCD Red Triad Color B" 1.0 0.0 1.0 0.1
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#pragma parameter triad_color_1_r "LCD Green Triad Color R" 1.0 0.0 1.0 0.1
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#pragma parameter triad_color_1_g "LCD Green Triad Color G" 1.0 0.0 1.0 0.1
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#pragma parameter triad_color_1_b "LCD Green Triad Color B" 0.0 0.0 1.0 0.1
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#pragma parameter triad_color_2_r "LCD Blue Triad Color R" 0.0 0.0 1.0 0.1
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#pragma parameter triad_color_2_g "LCD Blue Triad Color G" 1.0 0.0 1.0 0.1
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#pragma parameter triad_color_2_b "LCD Blue Triad Color B" 1.0 0.0 1.0 0.1
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#define cell_scale params.cell_scale
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#define triad_color_0_r params.triad_color_0_r
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#define triad_color_0_g params.triad_color_0_g
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#define triad_color_0_b params.triad_color_0_b
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#define triad_color_1_r params.triad_color_1_r
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#define triad_color_1_g params.triad_color_1_g
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#define triad_color_1_b params.triad_color_1_b
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#define triad_color_2_r params.triad_color_2_r
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#define triad_color_2_g params.triad_color_2_g
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#define triad_color_2_b params.triad_color_2_b
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layout(std140, set = 0, binding = 0) uniform UBO
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{
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mat4 MVP;
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} global;
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#pragma stage vertex
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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//vertex shader //
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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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 vTexCoord;
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layout(location = 1) out float dX;
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layout(location = 2) out float two_dX;
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layout(location = 3) out float three_dX;
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void main()
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{
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gl_Position = global.MVP * Position;
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vTexCoord = TexCoord;
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float texel_width = params.SourceSize.z;
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dX = texel_width;
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two_dX = 2.0 * texel_width;
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three_dX = 3.0 * texel_width;
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}
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#pragma stage fragment
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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//fragment definitions //
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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#define triad_color_0 vec3(triad_color_0_r, triad_color_0_g, triad_color_0_b) //magenta
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#define triad_color_1 vec3(triad_color_1_r, triad_color_1_g, triad_color_1_b) //yellow
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#define triad_color_2 vec3(triad_color_2_r, triad_color_2_g, triad_color_2_b) //cyan
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//#define triad_color_0 vec3(0.0, 0.0, 1.0) //blue
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//#define triad_color_1 vec3(1.0, 0.0, 0.0) //red
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//#define triad_color_2 vec3(0.0, 1.0, 0.0) //green
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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//fragment shader //
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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layout(location = 0) in vec2 vTexCoord;
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layout(location = 1) in float dX;
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layout(location = 2) in float two_dX;
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layout(location = 3) in float three_dX;
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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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void main()
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{
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//use modulo to deterimine the current subcell location and apply proper color
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float modX = mod(vTexCoord.x, cell_scale * three_dX);
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vec3 subpixel_color = (modX < cell_scale * dX) ? triad_color_0 :
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(modX < cell_scale * two_dX) ? triad_color_1 : triad_color_2;
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//use color darkening with input texture to determine the final color of the subpixel
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//color darkening: the minimum value for each color component between the LCD cell and the input image is selected
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//ex. LCD cell subpixel is magenta (1.0, 1.0, 0.0) and the current video texel is red (1.0, 0.0, 0.0)...
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//...the result will be the minimum of each component: result.rgb = min(1.0, 1.0), min(1.0, 0.0), min(0.0, 0.0) = (1.0, 0.0, 0.0) = red
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vec4 out_color = texture(Source, vTexCoord);
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out_color.rgb = vec3( min(out_color.r, subpixel_color.r),
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min(out_color.g, subpixel_color.g),
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min(out_color.b, subpixel_color.b) );
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FragColor = out_color;
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}
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