From f98b27592b2482dc89adc055073a3ee015f2424e Mon Sep 17 00:00:00 2001 From: Silas Bartha Date: Wed, 24 Apr 2024 14:03:15 -0400 Subject: Initial Commit --- assets/shaders/dither_post_process.wgsl | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 assets/shaders/dither_post_process.wgsl (limited to 'assets/shaders/dither_post_process.wgsl') diff --git a/assets/shaders/dither_post_process.wgsl b/assets/shaders/dither_post_process.wgsl new file mode 100644 index 0000000..37c25fc --- /dev/null +++ b/assets/shaders/dither_post_process.wgsl @@ -0,0 +1,24 @@ +#import bevy_core_pipeline::fullscreen_vertex_shader::FullscreenVertexOutput; + +@group(0) @binding(0) var screen_texture: texture_2d; +@group(0) @binding(1) var screen_sampler: sampler; +@group(0) @binding(2) var threshold_map_texture: texture_2d; +@group(0) @binding(3) var threshold_map_sampler: sampler; + +@fragment +fn fragment( + in: FullscreenVertexOutput +) -> @location(0) vec4 { + let screen_size = vec2f(textureDimensions(screen_texture)); + let threshold_map_size = vec2f(textureDimensions(threshold_map_texture)); + let pixel_position = floor(in.uv * screen_size); + let map_position = (pixel_position % threshold_map_size) / threshold_map_size; + + let threshold = textureSample(threshold_map_texture, threshold_map_sampler, map_position).r; + + let base_color = textureSample(screen_texture, screen_sampler, in.uv); + let luma = (0.2126 * base_color.r + 0.7152 * base_color.g + 0.0722 * base_color.b); + let value = f32(luma > threshold); + + return vec4f(value, value, value, 1.0); +} -- cgit v1.2.3