X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=fft_pass_effect.cpp;h=9c8aeb058e71fa33435901d4f5a2588a38ccb4f3;hp=c2b47f047c0747459b92682895be7b9a147f5de2;hb=0597b51d28b5f095931c54a5e5f90ed9d5e18790;hpb=c2371eea5dadf97add7c1a71b8ea660973c9c6de

diff --git a/fft_pass_effect.cpp b/fft_pass_effect.cpp
index c2b47f0..9c8aeb0 100644
--- a/fft_pass_effect.cpp
+++ b/fft_pass_effect.cpp
@@ -1,6 +1,7 @@
 #include <GL/glew.h>
 #include <math.h>
 
+#include "effect_chain.h"
 #include "effect_util.h"
 #include "fp16.h"
 #include "fft_pass_effect.h"
@@ -40,15 +41,13 @@ void FFTPassEffect::set_gl_state(GLuint glsl_program_num, const string &prefix,
 
 	int input_size = (direction == VERTICAL) ? input_height : input_width;
 
-	// See the comments on changes_output_size() in the .h file to see
-	// why this is legal. It is _needed_ because it counteracts the
-	// precision issues we get because we sample the input texture with
-	// normalized coordinates (especially when the repeat count along
-	// the axis is not a power of two); we very rapidly end up in narrowly
-	// missing a texel center, which causes precision loss to propagate
-	// throughout the FFT.
-	assert(*sampler_num == 1);
-	glActiveTexture(GL_TEXTURE0);
+	// This is needed because it counteracts the precision issues we get
+	// because we sample the input texture with normalized coordinates
+	// (especially when the repeat count along the axis is not a power of
+	// two); we very rapidly end up in narrowly missing a texel center,
+	// which causes precision loss to propagate throughout the FFT.
+	Node *self = chain->find_node_for_effect(this);
+	glActiveTexture(chain->get_input_sampler(self, 0));
 	check_error();
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 	check_error();