Refactor YCbCr chroma offset calculation into a separate function.

[movit] / util.h

diff --git a/util.h b/util.h
index 0d499453048d2e9bebb2ea50c8d56fd75c01c67d..b53bac76ce742367c618e47d1a4578d926bb8cd8 100644 (file)
--- a/util.h
+++ b/util.h
@@ -1,7 +1,43 @@
 #ifndef _UTIL_H
 #define _UTIL_H 1
 
-// assumes h in [0, 2pi> or [-pi, pi>
+// Various utilities.
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <string>
+#include <Eigen/Core>
+
+#include "opengl.h"
+
+#define BUFFER_OFFSET(i) ((char *)NULL + (i))
+
+// Converts a HSV color to RGB. Assumes h in [0, 2pi> or [-pi, pi>
 void hsv2rgb(float h, float s, float v, float *r, float *g, float *b);
 
+// Converts a HSV color to RGB, but keeps luminance constant
+// (ie. color luminance is as if S=0).
+void hsv2rgb_normalized(float h, float s, float v, float *r, float *g, float *b);
+
+// Read a file from disk and return its contents.
+// Dies if the file does not exist.
+std::string read_file(const std::string &filename);
+
+// Compile the given GLSL shader (typically a vertex or fragment shader)
+// and return the object number.
+GLuint compile_shader(const std::string &shader_src, GLenum type);
+
+// Print a 3x3 matrix to standard output. Useful for debugging.
+void print_3x3_matrix(const Eigen::Matrix3d &m);
+
+// Output a GLSL 3x3 matrix declaration.
+std::string output_glsl_mat3(const std::string &name, const Eigen::Matrix3d &m);
+
+#ifdef NDEBUG
+#define check_error()
+#else
+#define check_error() { int err = glGetError(); if (err != GL_NO_ERROR) { printf("GL error 0x%x at %s:%d\n", err, __FILE__, __LINE__); exit(1); } }
+#endif
+
 #endif // !defined(_UTIL_H)