X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=motion_search.vert;h=d0232767fbcef03434d18ad532ffbc0e0bbf870d;hb=3795723be95f2fe82f3c8b8b45b1a905b2c811fd;hp=0e782aa8c2fcab55267b9cf67608768bce01f39e;hpb=b21b2d8045035a08dd3a3eeabfe1c9457cc5cf61;p=nageru

diff --git a/motion_search.vert b/motion_search.vert
index 0e782aa..d023276 100644
--- a/motion_search.vert
+++ b/motion_search.vert
@@ -1,10 +1,13 @@
 #version 450 core
+#extension GL_ARB_shader_viewport_layer_array : require
 
 layout(location=0) in vec2 position;
-out vec2 flow_tc;
+out vec3 flow_tc;
 out vec2 patch_center;
+flat out int ref_layer, search_layer;
 
-uniform sampler2D flow_tex;
+uniform sampler2DArray flow_tex;
+uniform vec2 out_flow_size;
 
 void main()
 {
@@ -23,9 +26,8 @@ void main()
 	//
 	//   a = 1 / (w - 1)
 	//   b = w / 2 (w - 1)
-	vec2 flow_size = textureSize(flow_tex, 0);
-	vec2 a = flow_size / (flow_size - 1);
-	vec2 b = -1.0 / (2 * (flow_size - 1.0));
+	vec2 a = out_flow_size / (out_flow_size - 1);
+	vec2 b = -1.0 / (2 * (out_flow_size - 1.0));
 	patch_center = a * position + b;
 
 	// The result of glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0) is:
@@ -35,5 +37,11 @@ void main()
 	//   0.000  0.000 -2.000 -1.000
 	//   0.000  0.000  0.000  1.000
 	gl_Position = vec4(2.0 * position.x - 1.0, 2.0 * position.y - 1.0, -1.0, 1.0);
-	flow_tc = position;
+	flow_tc = vec3(position, gl_InstanceID);
+
+	gl_Layer = gl_InstanceID;
+
+	// Forward flow (0) goes from 0 to 1. Backward flow (1) goes from 1 to 0.
+	ref_layer = gl_InstanceID;
+	search_layer = 1 - gl_InstanceID;
 }