i need to think about what i'm doing for a bit

src/map/shader.glsl

@@ -1,4 +1,49 @@
 #version 450
+#extension GL_EXT_shader_explicit_arithmetic_types: require
+#extension GL_KHR_shader_subgroup_arithmetic: require
+
+in;
+
+struct ImageFormat {
+  uint32_t channel_stride;
+  uint32_t width;
+  uint32_t width_stride;
+  uint32_t height;
+  uint32_t height_stride;
+};
+
+layout(set = 0, binding = 0) buffer ImF {
+  ImageFormat image_format;
+};
+
+layout(set = 0, binding = 1) buffer GoalImage
+{
+  float goal_image[];
+};
+
+struct Transform {
+  f32mat3 color_matrix;
+  u32vec2 from_corner;
+  u32vec2 from_extents;
+  f32vec2 to_corner;
+  f32mat2 to_extents;
+};
+
+layout(set = 0, binding = 2) buffer Tfs {
+  Transform transforms[];
+};
+
+
+uvec3 get_pixel_offsets(uint x, uint y) {
+  uint base_offset = x * image_format.width_stride + y * image_format.height_stride;
+  return uvec3(base_offset, base_offset + image_format.channel_stride, base_offset + image_format.channel_stride + image_format.channel_stride);
+}
+
+vec3 get_goal_pixel(uint x, uint y) {
+  uvec3 offsets = get_pixel_offsets(x, y);
+  return vec3(goal_image[offsets.x], goal_image[offsets.y], goal_image[offsets.z]);
+}
+
 
 void main() {
 }

src/transform.rs

@@ -3,6 +3,7 @@ use image::{Rgb, GenericImage};
 pub const NCOLORS: usize = 3;
 
 #[derive(Debug, Clone)]
+#[repr(C)]
 pub struct Transform {
   pub color_matrix: [f32; NCOLORS * NCOLORS],
   // TODO: make these f32s