Initial Commitv0.1.0

1 files changed, 24 insertions, 0 deletions

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<f32>;
+@group(0) @binding(1) var screen_sampler: sampler;
+@group(0) @binding(2) var threshold_map_texture: texture_2d<f32>;
+@group(0) @binding(3) var threshold_map_sampler: sampler;
+
+@fragment
+fn fragment(
+	in: FullscreenVertexOutput
+) -> @location(0) vec4<f32> {
+    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);
+}