mirror of
https://github.com/italicsjenga/slang-shaders.git
synced 2024-10-18 07:41:31 +11:00
86 lines
3.7 KiB
Plaintext
86 lines
3.7 KiB
Plaintext
#version 450
|
|
|
|
// Pixellate Shader
|
|
// Copyright (c) 2011, 2012 Fes
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice appear in all copies.
|
|
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
|
|
// IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
// (Fes gave their permission to have this shader distributed under this
|
|
// licence in this forum post:
|
|
// http://board.byuu.org/viewtopic.php?p=57295#p57295
|
|
|
|
layout(std140, set = 0, binding = 0) uniform UBO
|
|
{
|
|
mat4 MVP;
|
|
vec4 OutputSize;
|
|
vec4 OriginalSize;
|
|
vec4 SourceSize;
|
|
float INTERPOLATE_IN_LINEAR_GAMMA;
|
|
} global;
|
|
|
|
#pragma parameter INTERPOLATE_IN_LINEAR_GAMMA "Linear Gamma Weight" 1.0 0.0 1.0 1.0
|
|
|
|
#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()
|
|
{
|
|
vec2 texelSize = global.SourceSize.zw;
|
|
|
|
vec2 range = vec2(abs(global.SourceSize.x / (global.OutputSize.x * global.SourceSize.x)), abs(global.SourceSize.y / (global.OutputSize.y * global.SourceSize.y)));
|
|
range = range / 2.0 * 0.999;
|
|
|
|
float left = vTexCoord.x - range.x;
|
|
float top = vTexCoord.y + range.y;
|
|
float right = vTexCoord.x + range.x;
|
|
float bottom = vTexCoord.y - range.y;
|
|
|
|
vec3 topLeftColor;
|
|
vec3 bottomRightColor;
|
|
vec3 bottomLeftColor;
|
|
vec3 topRightColor;
|
|
|
|
if (global.INTERPOLATE_IN_LINEAR_GAMMA > 0.5){
|
|
topLeftColor = pow(texture(Source, (floor(vec2(left, top) / texelSize) + 0.5) * texelSize).rgb, vec3(2.2));
|
|
bottomRightColor = pow(texture(Source, (floor(vec2(right, bottom) / texelSize) + 0.5) * texelSize).rgb, vec3(2.2));
|
|
bottomLeftColor = pow(texture(Source, (floor(vec2(left, bottom) / texelSize) + 0.5) * texelSize).rgb, vec3(2.2));
|
|
topRightColor = pow(texture(Source, (floor(vec2(right, top) / texelSize) + 0.5) * texelSize).rgb, vec3(2.2));
|
|
}else{
|
|
topLeftColor = texture(Source, (floor(vec2(left, top) / texelSize) + 0.5) * texelSize).rgb;
|
|
bottomRightColor = texture(Source, (floor(vec2(right, bottom) / texelSize) + 0.5) * texelSize).rgb;
|
|
bottomLeftColor = texture(Source, (floor(vec2(left, bottom) / texelSize) + 0.5) * texelSize).rgb;
|
|
topRightColor = texture(Source, (floor(vec2(right, top) / texelSize) + 0.5) * texelSize).rgb;}
|
|
|
|
vec2 border = clamp(round(vTexCoord / texelSize) * texelSize, vec2(left, bottom), vec2(right, top));
|
|
|
|
float totalArea = 4.0 * range.x * range.y;
|
|
|
|
vec3 averageColor;
|
|
averageColor = ((border.x - left) * (top - border.y) / totalArea) * topLeftColor;
|
|
averageColor += ((right - border.x) * (border.y - bottom) / totalArea) * bottomRightColor;
|
|
averageColor += ((border.x - left) * (border.y - bottom) / totalArea) * bottomLeftColor;
|
|
averageColor += ((right - border.x) * (top - border.y) / totalArea) * topRightColor;
|
|
|
|
FragColor = (global.INTERPOLATE_IN_LINEAR_GAMMA > 0.5) ? vec4(pow(averageColor, vec3(1.0 / 2.2)), 1.0) : vec4(averageColor, 1.0);
|
|
}
|