X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=deconvolution_sharpen_effect.cpp;h=2d32ecd6724d886a03185b1042b643a15a83075b;hp=d9d54aa0a30d4dcfe1718659a1aecdbab754019e;hb=29072985d0a00a53e5b578a1444cee61a0c9e1f2;hpb=17b9cf4ea40d560afed9e44b6039b02b605855e0

diff --git a/deconvolution_sharpen_effect.cpp b/deconvolution_sharpen_effect.cpp
index d9d54aa..2d32ecd 100644
--- a/deconvolution_sharpen_effect.cpp
+++ b/deconvolution_sharpen_effect.cpp
@@ -5,12 +5,12 @@
 
 #include <math.h>
 #include <assert.h>
+#include <GL/glew.h>
 #include <Eigen/Dense>
 #include <Eigen/Cholesky>
 
 #include "deconvolution_sharpen_effect.h"
 #include "util.h"
-#include "opengl.h"
 
 using namespace Eigen;
 
@@ -268,8 +268,7 @@ void DeconvolutionSharpenEffect::update_deconvolution_kernel()
 			if (gaussian_radius < 1e-3) {
 				val = (x == 0 && y == 0) ? 1.0f : 0.0f;
 			} else {
-				float z = hypot(x, y) / gaussian_radius;
-				val = exp(-z * z);
+				val = exp(-(x*x + y*y) / (2.0 * gaussian_radius * gaussian_radius));
 			}
 			gaussian_h(y + 2 * R, x + 2 * R) = val;
 		}
@@ -372,8 +371,7 @@ void DeconvolutionSharpenEffect::update_deconvolution_kernel()
 	//   (G+H)     x0 + I x2     = y2
 	//
 	// This both increases accuracy and provides us with a very nice speed
-	// boost. We could have gone even further and went for 8-way symmetry
-	// like the shader does, but this is good enough right now.
+	// boost.
 	MatrixXf M(MatrixXf::Zero((R + 1) * (R + 1), (R + 1) * (R + 1)));
 	MatrixXf r_uv_flattened(MatrixXf::Zero((R + 1) * (R + 1), 1));
 	for (int outer_i = 0; outer_i < 2 * R + 1; ++outer_i) {
@@ -438,7 +436,6 @@ void DeconvolutionSharpenEffect::set_gl_state(GLuint glsl_program_num, const std
 		update_deconvolution_kernel();
 	}
 	// Now encode it as uniforms, and pass it on to the shader.
-	// (Actually the shader only uses about half of the elements.)
 	float samples[4 * (R + 1) * (R + 1)];
 	for (int y = 0; y <= R; ++y) {
 		for (int x = 0; x <= R; ++x) {