From ccef4b869392d24b3ba7942ebd56a81e9d3227fb Mon Sep 17 00:00:00 2001 From: hunterk Date: Tue, 19 Oct 2021 10:45:50 -0500 Subject: [PATCH] Add a couple more stereoscopic 3D shaders (#197) * add a couple more stereoscopic 3D shaders * missed one for some reason --- .../shaders/sbs-to-interlaced.slang | 65 +++++++++++++++++++ stereoscopic-3d/shaders/sbs-to-shutter.slang | 64 ++++++++++++++++++ .../side-by-side-to-interlaced.slangp | 3 + .../side-by-side-to-shutter.slangp | 3 + 4 files changed, 135 insertions(+) create mode 100644 stereoscopic-3d/shaders/sbs-to-interlaced.slang create mode 100644 stereoscopic-3d/shaders/sbs-to-shutter.slang create mode 100644 stereoscopic-3d/side-by-side-to-interlaced.slangp create mode 100644 stereoscopic-3d/side-by-side-to-shutter.slangp diff --git a/stereoscopic-3d/shaders/sbs-to-interlaced.slang b/stereoscopic-3d/shaders/sbs-to-interlaced.slang new file mode 100644 index 0000000..c933159 --- /dev/null +++ b/stereoscopic-3d/shaders/sbs-to-interlaced.slang @@ -0,0 +1,65 @@ +#version 450 + +// side-by-side to interlaced 3D +// author: hunterk +// license: public domain + +// convert side-by-side content to work with interlaced 3D displays + +layout(push_constant) uniform Push +{ + vec4 SourceSize; + vec4 OriginalSize; + vec4 OutputSize; + uint FrameCount; + float split_dist, interlace_zoom, interlace_eye_swap, aspect_mod, crop, vert; +} params; + +#pragma parameter split_dist "Eye Separation" 0.25 -1.0 1.0 0.001 +#pragma parameter interlace_zoom "Interlace Zoom" 0.8 0.0 2.0 0.01 +#pragma parameter interlace_eye_swap "Interlace Swap Eyes" 0.0 0.0 1.0 1.0 +#pragma parameter aspect_mod "Aspect Mod" 0.55 0.0 2.0 0.01 +#pragma parameter crop "Crop Edges" 0.5 0.0 1.0 0.005 +#pragma parameter vert "Swap Interlacing Direction (horz / vert)" 0.0 0.0 1.0 1.0 + +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; +layout(location = 1) out vec2 leftCoord; +layout(location = 2) out vec2 rightCoord; + +void main() +{ + gl_Position = global.MVP * Position; + vTexCoord = (((TexCoord - 0.5) * params.interlace_zoom) * vec2(params.aspect_mod, 1.0)) + 0.5; + leftCoord = vTexCoord + vec2(params.split_dist, 0.); + rightCoord = vTexCoord - vec2(params.split_dist, 0.); +} + +#pragma stage fragment +layout(location = 0) in vec2 vTexCoord; +layout(location = 1) in vec2 leftCoord; +layout(location = 2) in vec2 rightCoord; +layout(location = 0) out vec4 FragColor; +layout(set = 0, binding = 2) uniform sampler2D Source; + +void main() +{ + // interlaced displays want every other physical pixel, so use gl_FragCoord + float fragcoord = mix(gl_FragCoord.x, gl_FragCoord.y, params.vert); + vec2 oscillator = vec2(mod(fragcoord.x, 2.0), mod(fragcoord.x + 1.0, 2.0)); + vec4 left_eye = texture(Source, leftCoord); + left_eye = (leftCoord.x < 1.0 && leftCoord.x > params.crop) + ? left_eye : vec4(0.0); + vec4 right_eye = texture(Source, rightCoord); + right_eye = (rightCoord.x > 0.0 && rightCoord.x < params.crop) + ? right_eye : vec4(0.0); + bool eye_picker = mix(oscillator.x, oscillator.y, params.interlace_eye_swap) > 1.0; + FragColor = (eye_picker) ? left_eye : right_eye; +} diff --git a/stereoscopic-3d/shaders/sbs-to-shutter.slang b/stereoscopic-3d/shaders/sbs-to-shutter.slang new file mode 100644 index 0000000..ebb9ad7 --- /dev/null +++ b/stereoscopic-3d/shaders/sbs-to-shutter.slang @@ -0,0 +1,64 @@ +#version 450 + +// side-by-side to shutter 3D +// author: hunterk +// license: public domain + +// convert side-by-side content to work with shutter glasses + +layout(push_constant) uniform Push +{ + vec4 SourceSize; + vec4 OriginalSize; + vec4 OutputSize; + uint FrameCount; + float split_dist, shutter_zoom, shutter_eye_swap, aspect_mod, crop; +} params; + +#pragma parameter split_dist "Eye Separation" 0.25 -1.0 1.0 0.001 +#pragma parameter shutter_zoom "Shutter Zoom" 0.8 0.0 2.0 0.01 +#pragma parameter shutter_eye_swap "Shutter Swap Eyes" 0.0 0.0 1.0 1.0 +#pragma parameter aspect_mod "Aspect Mod" 0.55 0.0 2.0 0.01 +#pragma parameter crop "Crop Edges" 0.5 0.0 1.0 0.005 + +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; +layout(location = 1) out vec2 leftCoord; +layout(location = 2) out vec2 rightCoord; +layout(location = 3) out vec2 oscillator; + +void main() +{ + gl_Position = global.MVP * Position; + vTexCoord = (((TexCoord - 0.5) * params.shutter_zoom) * vec2(params.aspect_mod, 1.0)) + 0.5; + leftCoord = vTexCoord + vec2(params.split_dist, 0.); + rightCoord = vTexCoord - vec2(params.split_dist, 0.); + oscillator.x = mod(float(params.FrameCount), 2.0); + oscillator.y = 1. - oscillator.x; +} + +#pragma stage fragment +layout(location = 0) in vec2 vTexCoord; +layout(location = 1) in vec2 leftCoord; +layout(location = 2) in vec2 rightCoord; +layout(location = 3) in vec2 oscillator; +layout(location = 0) out vec4 FragColor; +layout(set = 0, binding = 2) uniform sampler2D Source; + +void main() +{ + vec4 left_eye = texture(Source, leftCoord); + left_eye = (leftCoord.x < 1.0 && leftCoord.x > params.crop) + ? left_eye : vec4(0.0); + vec4 right_eye = texture(Source, rightCoord); + right_eye = (rightCoord.x > 0.0 && rightCoord.x < params.crop) + ? right_eye : vec4(0.0); + FragColor = mix(left_eye, right_eye, (bool(params.shutter_eye_swap)) ? oscillator.x : oscillator.y); +} diff --git a/stereoscopic-3d/side-by-side-to-interlaced.slangp b/stereoscopic-3d/side-by-side-to-interlaced.slangp new file mode 100644 index 0000000..e3f9cc4 --- /dev/null +++ b/stereoscopic-3d/side-by-side-to-interlaced.slangp @@ -0,0 +1,3 @@ +shaders = 1 + +shader0 = shaders/sbs-to-interlaced.slang diff --git a/stereoscopic-3d/side-by-side-to-shutter.slangp b/stereoscopic-3d/side-by-side-to-shutter.slangp new file mode 100644 index 0000000..645dce3 --- /dev/null +++ b/stereoscopic-3d/side-by-side-to-shutter.slangp @@ -0,0 +1,3 @@ +shaders = 1 + +shader0 = shaders/sbs-to-shutter.slang