libretro/slang-shaders
1
0
Fork 0
mirror of https://github.com/libretro/slang-shaders.git synced 2024-11-23 00:10:03 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Add basic gamma corrected linear and cubic filters.

Browse Source
This commit is contained in:
Hans-Kristian Arntzen 2016-02-23 22:03:33 +01:00
parent 7b1827a213
commit 7f80f00a4a
8 changed files with 285 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
cubic/cubic-gamma-correct.slang Normal file
View File

@ -0,0 +1,84 @@
#version 450
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 weights(out vec4 x, out vec4 y, vec2 t)
{
vec2 t2 = t * t;
vec2 t3 = t2 * t;
vec4 xs = vec4(1.0, t.x, t2.x, t3.x);
vec4 ys = vec4(1.0, t.y, t2.y, t3.y);
const vec4 p0 = vec4(+0.0, -0.5, +1.0, -0.5);
const vec4 p1 = vec4(+1.0, 0.0, -2.5, +1.5);
const vec4 p2 = vec4(+0.0, +0.5, +2.0, -1.5);
const vec4 p3 = vec4(+0.0, 0.0, -0.5, +0.5);
x = vec4(dot(xs, p0), dot(xs, p1), dot(xs, p2), dot(xs, p3));
y = vec4(dot(ys, p0), dot(ys, p1), dot(ys, p2), dot(ys, p3));
}
void main()
{
vec2 uv = vTexCoord * global.SourceSize.xy - 0.5;
vec2 texel = floor(uv);
vec2 tex = (texel + 0.5) * global.SourceSize.zw;
vec2 phase = uv - texel;
#define TEX(x, y) textureLodOffset(Source, tex, 0.0, ivec2(x, y)).rgb
vec4 x;
vec4 y;
weights(x, y, phase);
vec3 color;
vec4 row = x * y.x;
color = TEX(-1, -1) * row.x;
color += TEX(+0, -1) * row.y;
color += TEX(+1, -1) * row.z;
color += TEX(+2, -1) * row.w;
row = x * y.y;
color += TEX(-1, +0) * row.x;
color += TEX(+0, +0) * row.y;
color += TEX(+1, +0) * row.z;
color += TEX(+2, +0) * row.w;
row = x * y.z;
color += TEX(-1, +1) * row.x;
color += TEX(+0, +1) * row.y;
color += TEX(+1, +1) * row.z;
color += TEX(+2, +1) * row.w;
row = x * y.w;
color += TEX(-1, +2) * row.x;
color += TEX(+0, +2) * row.y;
color += TEX(+1, +2) * row.z;
color += TEX(+2, +2) * row.w;
color = sqrt(clamp(color, vec3(0.0), vec3(1.0)));
FragColor = vec4(color, 1.0);
}

10
cubic/cubic-gamma-correct.slangp Normal file
View File

@ -0,0 +1,10 @@
shaders = 2
shader0 = linearize.slang
shader1 = cubic-gamma-correct.slang
filter_linear0 = false
scale_type0 = source
scale0 = 1.0
srgb_framebuffer0 = true
filter_linear1 = false

83
cubic/cubic.slang Normal file
View File

@ -0,0 +1,83 @@
#version 450
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 weights(out vec4 x, out vec4 y, vec2 t)
{
vec2 t2 = t * t;
vec2 t3 = t2 * t;
vec4 xs = vec4(1.0, t.x, t2.x, t3.x);
vec4 ys = vec4(1.0, t.y, t2.y, t3.y);
const vec4 p0 = vec4(+0.0, -0.5, +1.0, -0.5);
const vec4 p1 = vec4(+1.0, 0.0, -2.5, +1.5);
const vec4 p2 = vec4(+0.0, +0.5, +2.0, -1.5);
const vec4 p3 = vec4(+0.0, 0.0, -0.5, +0.5);
x = vec4(dot(xs, p0), dot(xs, p1), dot(xs, p2), dot(xs, p3));
y = vec4(dot(ys, p0), dot(ys, p1), dot(ys, p2), dot(ys, p3));
}
void main()
{
vec2 uv = vTexCoord * global.SourceSize.xy - 0.5;
vec2 texel = floor(uv);
vec2 tex = (texel + 0.5) * global.SourceSize.zw;
vec2 phase = uv - texel;
#define TEX(x, y) textureLodOffset(Source, tex, 0.0, ivec2(x, y)).rgb
vec4 x;
vec4 y;
weights(x, y, phase);
vec3 color;
vec4 row = x * y.x;
color = TEX(-1, -1) * row.x;
color += TEX(+0, -1) * row.y;
color += TEX(+1, -1) * row.z;
color += TEX(+2, -1) * row.w;
row = x * y.y;
color += TEX(-1, +0) * row.x;
color += TEX(+0, +0) * row.y;
color += TEX(+1, +0) * row.z;
color += TEX(+2, +0) * row.w;
row = x * y.z;
color += TEX(-1, +1) * row.x;
color += TEX(+0, +1) * row.y;
color += TEX(+1, +1) * row.z;
color += TEX(+2, +1) * row.w;
row = x * y.w;
color += TEX(-1, +2) * row.x;
color += TEX(+0, +2) * row.y;
color += TEX(+1, +2) * row.z;
color += TEX(+2, +2) * row.w;
FragColor = vec4(color, 1.0);
}

3
cubic/cubic.slangp Normal file
View File

@ -0,0 +1,3 @@
shaders = 1
shader0 = cubic.slang
filter_linear0 = false

32
cubic/linearize.slang Normal file
View File

@ -0,0 +1,32 @@
#version 450
layout(std140, set = 0, binding = 0) uniform UBO
{
mat4 MVP;
} 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;
vec3 gamma(vec3 v)
{
return v * v;
}
void main()
{
FragColor = vec4(gamma(texture(Source, vTexCoord).rgb), 1.0);
}

31
linear/linear-gamma-correct.slang Normal file
View File

@ -0,0 +1,31 @@
#version 450
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()
{
vec3 color = texture(Source, vTexCoord).rgb;
FragColor = vec4(sqrt(color), 1.0);
}

10
linear/linear-gamma-correct.slangp Normal file
View File

@ -0,0 +1,10 @@
shaders = 2
shader0 = linearize.slang
shader1 = linear-gamma-correct.slang
filter_linear0 = false
scale_type0 = source
scale0 = 1.0
srgb_framebuffer0 = true
filter_linear1 = true

32
linear/linearize.slang Normal file
View File

@ -0,0 +1,32 @@
#version 450
layout(std140, set = 0, binding = 0) uniform UBO
{
mat4 MVP;
} 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;
vec3 gamma(vec3 v)
{
return v * v;
}
void main()
{
FragColor = vec4(gamma(texture(Source, vTexCoord).rgb), 1.0);
}