mirror of
https://github.com/italicsjenga/slang-shaders.git
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b9d89d63db
* Initial commit, WIP * First working version; stretching the blur will require some refactoring * Add blur extension to borders * Implement 'trippy mode' (disable blur, show tiled) * Implement proper scaling, cropping, and centering independent of viewport res * Clean up; Fix bug with small blur pass resolutions * Add blur strength presets; Polish * Add background gamma adjustment
110 lines
3.5 KiB
Plaintext
110 lines
3.5 KiB
Plaintext
#version 450
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/*
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Blur fill v1.0 by fishku
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Copyright (C) 2023
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Public domain license (CC0)
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This shader preset allows cropping the image on any side, and filling the
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cropped area with a blurred version of the input image borders.
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This is useful for certain games that do not render a full image to maintain
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the overall aspect ratio and to avoid burn-in.
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The preset also allows you to extend the original content to a larger
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screen. It's recommended to set the video scaling options as follows:
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- Turn integer scaling OFF
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- Set aspect ratio to FULL
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The shader will then take over and handle the proper scaling and aspect
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ratio of the input.
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The preset comes in three variants which differ only in the strength of the
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blur.
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Since the blur strength in the dual filter blur depends on the input
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resolution, and because there is currently no mechanism to set resolution
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based on user parameters, the three variants provide different sampling
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resolutions which affect the strength of the blur.
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Additionally to the resolution, a blur radius parameter controls the
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strength of the blur.
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Changelog:
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v1.0: Initial release.
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*/
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#include "../../../blurs/shaders/dual_filter/parameters.slang"
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#include "parameters.slang"
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layout(push_constant) uniform Push {
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vec4 InputSize;
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vec4 TiledSize;
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vec4 FinalViewportSize;
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float OS_CROP_TOP;
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float OS_CROP_BOTTOM;
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float OS_CROP_LEFT;
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float OS_CROP_RIGHT;
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float CENTER_CROP;
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float SAMPLE_SIZE;
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float FORCE_ASPECT_RATIO;
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float ASPECT_H;
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float ASPECT_V;
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float FORCE_INTEGER_SCALING;
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float FILL_GAMMA;
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// From dual filter blur
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float BLUR_RADIUS;
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}
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param;
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#include "scaling.slang"
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layout(std140, set = 0, binding = 0) uniform UBO { mat4 MVP; }
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global;
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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 vTexCoord;
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void main() {
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gl_Position = global.MVP * Position;
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vTexCoord = TexCoord;
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}
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#pragma stage fragment
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layout(location = 0) in vec2 vTexCoord;
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layout(location = 0) out vec4 FragColor;
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layout(set = 0, binding = 2) uniform sampler2D Input;
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layout(set = 0, binding = 3) uniform sampler2D Tiled;
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layout(set = 0, binding = 4) uniform sampler2D Blurred;
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void main() {
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const vec2 pixel_coord = o2i(vTexCoord) * param.InputSize.xy;
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const vec4 input_extrema = vec4(param.OS_CROP_LEFT, param.OS_CROP_TOP,
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param.InputSize.x - param.OS_CROP_RIGHT,
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param.InputSize.y - param.OS_CROP_BOTTOM);
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if (any(lessThan(pixel_coord, input_extrema.xy)) ||
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any(greaterThanEqual(pixel_coord, input_extrema.zw))) {
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if (param.BLUR_RADIUS > 0.0) {
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// Sample blur.
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FragColor = vec4(
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pow(texture(Blurred, vTexCoord).rgb, vec3(param.FILL_GAMMA)),
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1.0);
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} else {
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// Sample tiled pattern.
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// Do a sharp (nearest neighbor) resampling.
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FragColor =
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vec4(pow(texture(Tiled,
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(floor(vTexCoord * param.TiledSize.xy) + 0.5) *
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param.TiledSize.zw)
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.rgb,
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vec3(param.FILL_GAMMA)),
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1.0);
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}
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} else {
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// Sample original.
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// Do a sharp (nearest neighbor) resampling.
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FragColor = vec4(
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texture(Input, (floor(pixel_coord) + 0.5) * param.InputSize.zw).rgb,
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1.0);
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}
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}
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