Make the blur use the resize functionality, which also unbreaks the in-between sampli...

[movit] / util.h

diff --git a/util.h b/util.h
index 0d499453048d2e9bebb2ea50c8d56fd75c01c67d..209a7dca42958a9313ed3f5d441267d9000e187a 100644 (file)
--- a/util.h
+++ b/util.h
@@ -1,7 +1,44 @@
 #ifndef _UTIL_H
 #define _UTIL_H 1
 
 #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 "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);
 
 void hsv2rgb(float h, float s, float v, float *r, float *g, float *b);
 

+// Column major (same as OpenGL).
+typedef double Matrix3x3[9];
+
+// 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);
+
+// Compute a * b.
+void multiply_3x3_matrices(const Matrix3x3 a, const Matrix3x3 b, Matrix3x3 result);
+
+// Compute m^-1. Result is undefined if the matrix is singular or near-singular.
+void invert_3x3_matrix(const Matrix3x3 m, Matrix3x3 result);
+
+// Print a 3x3 matrix to standard output. Useful for debugging.
+void print_3x3_matrix(const Matrix3x3 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)
 #endif // !defined(_UTIL_H)