X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=util.h;h=1ecdc00ce1b91dce58547b8d243fed8f3e4f3b3c;hp=b01d62c00f00588a21b2587e6387f649b6b3bdc1;hb=09c983894685554b41f622dadd40ac1a4efc527d;hpb=9447b2d234394c1d966f77ed87271a3625a81cdd diff --git a/util.h b/util.h index b01d62c..1ecdc00 100644 --- a/util.h +++ b/util.h @@ -1,18 +1,18 @@ -#ifndef _UTIL_H -#define _UTIL_H 1 +#ifndef _MOVIT_UTIL_H +#define _MOVIT_UTIL_H 1 // Various utilities. +#include #include #include - -#include #include - -#include "opengl.h" +#include #define BUFFER_OFFSET(i) ((char *)NULL + (i)) +namespace movit { + // 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); @@ -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]. // @@ -43,16 +46,28 @@ std::string output_glsl_mat3(const std::string &name, const Eigen::Matrix3d &m); // (estimated) squared errors of the two weights. void combine_two_samples(float w1, float w2, float *offset, float *total_weight, float *sum_sq_error); +// Create a VBO with the given data, and bind it to the vertex attribute +// with name . Returns the VBO number. +GLuint fill_vertex_attribute(GLuint glsl_program_num, const std::string &attribute_name, GLint size, GLenum type, GLsizeiptr data_size, const GLvoid *data); + +// 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 #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 - -#ifdef __GNUC__ -#define MUST_CHECK_RESULT __attribute__((warn_unused_result)) -#else -#define MUST_CHECK_RESULT +#define check_error() { int err = glGetError(); if (err != GL_NO_ERROR) { printf("GL error 0x%x at %s:%d\n", err, __FILE__, __LINE__); abort(); } } #endif // CHECK() is like assert(), but retains any side effects no matter the compilation mode. @@ -62,4 +77,4 @@ void combine_two_samples(float w1, float w2, float *offset, float *total_weight, #define CHECK(x) do { bool ok = x; if (!ok) { fprintf(stderr, "%s:%d: %s: Assertion `%s' failed.\n", __FILE__, __LINE__, __PRETTY_FUNCTION__, #x); abort(); } } while (false) #endif -#endif // !defined(_UTIL_H) +#endif // !defined(_MOVIT_UTIL_H)