X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=util.h;h=6def56d87614a68454a45d45182e577cf612246f;hp=627c62934d7ce857ef4bb2263e35c6d1e30d4ec9;hb=5c3f76b097c3f3ef1e454f574068a2434c64fa4a;hpb=d398770154ecc4bc95282dc45656789dd5686309

diff --git a/util.h b/util.h
index 627c629..6def56d 100644
--- a/util.h
+++ b/util.h
@@ -3,7 +3,7 @@
 
 // Various utilities.
 
-#include <GL/glew.h>
+#include <epoxy/gl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <Eigen/Core>
@@ -34,6 +34,9 @@ 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);
 
+// Calculate a / b, rounding up. Does not handle overflow correctly.
+unsigned div_round_up(unsigned a, unsigned b);
+
 // Calculate where to sample, and with what weight, if one wants to use
 // the GPU's bilinear hardware to sample w1 * x[0] + w2 * x[1].
 //
@@ -50,6 +53,15 @@ GLuint fill_vertex_attribute(GLuint glsl_program_num, const std::string &attribu
 // Clean up after fill_vertex_attribute().
 void cleanup_vertex_attribute(GLuint glsl_program_num, const std::string &attribute_name, GLuint vbo);
 
+// If v is not already a power of two, return the first higher power of two.
+unsigned next_power_of_two(unsigned v);
+
+// Get a pointer that represents the current OpenGL context, in a cross-platform way.
+// This is not intended for anything but identification (ie., so you can associate
+// different FBOs with different contexts); you should probably not try to cast it
+// back into anything you intend to pass into OpenGL.
+void *get_gl_context_identifier();
+
 }  // namespace movit
 
 #ifdef NDEBUG