add fwd decls to spirt.cl

1 files changed, 10 insertions, 0 deletions

diff --git a/src/cl/spirt.cl b/src/cl/spirt.cl
index 1fe7bd0..136fd81 100644
--- a/src/cl/spirt.cl
+++ b/src/cl/spirt.cl
@@ -18,6 +18,16 @@ struct ray {
 	float3 dir;
 };
 
+static float3 at(struct ray ray, float t);
+static float length_squared(float3 v);
+
+__kernel void gen_rays(__global float3 *rays, float3 camera_centre,
+                       float3 pixel_delta_u, float3 pixel_delta_v,
+                       float3 corner00);
+
+static float hit_sphere(float3 center, float radius, struct ray ray);
+__kernel void ray_colour(__global float *canvas, __global const float3 *rays);
+
 static float3
 at(const struct ray ray, const float t)
 {