In ResampleEffect, precompute the Lanczos function into a table.

[movit] / header.frag

diff --git a/header.frag b/header.frag
index 86c5730d2da831367d106ffe69b0033e114d7c75..44ce5b4238d3478cb073cc2b015098c2a2e7d578 100644 (file)
--- a/header.frag
+++ b/header.frag
@@ -1 +1,15 @@
+#ifdef GL_ES
+precision highp float;
+#endif
+
+#ifdef GL_EXT_gpu_shader4
+// We sometimes want round().
+#extension GL_EXT_gpu_shader4 : enable
+#endif
+
 varying vec2 tc;
+
+vec4 tex2D(sampler2D s, vec2 coord)
+{
+       return texture2D(s, coord);
+}