X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=util.h;h=1c2f6a669f6bec63d9a4531c9b3c57986ae70c8c;hb=aa72f1070c44ed0217ce1ffde599d5c40864ac4a;hp=3957b863c1ec8a635ab720f88a263320d0c54919;hpb=928743085b7f0f88b3e1b0e59e2d7ebec7816bd2;p=movit

diff --git a/util.h b/util.h
index 3957b86..1c2f6a6 100644
--- a/util.h
+++ b/util.h
@@ -6,15 +6,24 @@
 
 #include <string>
 
+#include <GL/gl.h>
+
 // assumes h in [0, 2pi> or [-pi, pi>
 void hsv2rgb(float h, float s, float v, float *r, float *g, float *b);
 
+// Column major (same as OpenGL).
+typedef double Matrix3x3[9];
+
 std::string read_file(const std::string &filename);
+GLuint compile_shader(const std::string &shader_src, GLenum type);
+void multiply_3x3_matrices(const Matrix3x3 a, const Matrix3x3 b, Matrix3x3 result);
+void invert_3x3_matrix(const Matrix3x3 m, Matrix3x3 result);
+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 line %d\n", err, __LINE__); exit(1); } }
+#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)