util.h
#pragma once
#include "inc.h"
#define LUAFUNCD(id) lil_l_ ## id
#define LUAFUNC(id) int lil_l_ ## id (lua_State* L)
#define LUAREGD(id) l_lil_ ## id
#define LUAREG(id) const struct luaL_Reg l_lil_ ## id[]
#define PI 3.14159265358979323846
#define min(a, b) ((a) > (b) ? (b) : (a))
#define max(a, b) ((a) > (b) ? (a) : (b))
#define clamp(n, mi, ma) (min(max((n), mi), ma))
#define clamp255(n) (clamp((n), 0, 255))
#define clamp1(n) (clamp((n), 0, 1))
#define degToRad(deg) ((deg) * (PI/180.))
#ifdef _OPENMP
#define TIMERSTART double tImErStart = omp_get_wtime()
#if defined(__clang__)
#define TIMEREND { double tImErEnd = omp_get_wtime(); fprintf(stderr, "Clang TIMER %s() : %f\n", __func__, tImErEnd - tImErStart); }
#elif defined(__GNUC__) || defined(__GNUG__)
#define TIMEREND { double tImErEnd = omp_get_wtime(); fprintf(stderr, "GCC TIMER %s() : %f\n", __func__, tImErEnd - tImErStart); }
#else
#define TIMEREND { double tImErEnd = omp_get_wtime(); fprintf(stderr, "TIMER %s() : %f\n", __func__, tImErEnd - tImErStart); }
#endif
#else
#define TIMERSTART
#define TIMEREND fprintf(stderr, "TIMER %s(): not using openmp\n", __func__);
#endif
#if LUA_VERSION_NUM >= 502
#define lua_objlen lua_rawlen
#endif
#define isByte1(flags, i) ((flags & (1 << (i))) >> (i))
#define isWithinBounds(img, x, y) ((x) >= 0 && (y) >= 0 && (x) < (img)->w && (y) < (img)->h)
#define XY(img, x, y) (((img)->w * (y)) + (x))
void lil_dumpstack(lua_State* L);
lil_Colour lil_getColour(lua_State* L, int index, lil_Colour* def);
uintmax_t lil_getStringFlags(lua_State* L, int index, const char* list, const char* def);
enum lil_BlendMode lil_getOptBlendMode(lua_State* L, int i);
enum lil_SampleMode lil_getOptSampleMode(lua_State* L, int i, lil_Number xs, lil_Number ys);
int lil_getOptEnum(lua_State* L, int i, const char* key, const char* const* list, const char* const def);
int lil_getOptInt(lua_State* L, int i, const char* key, int def);
lil_Number lil_getOptFloat(lua_State* L, int i, const char* key, lil_Number def);
void lil_getOpt2dVec(lua_State* L, int i, const char* key, int* r1, int* r2);
bool lil_getOptBool(lua_State* L, int i, const char* key, int def);
void lil_getExportOpts(lua_State* L, int i, lil_Number* qualityRet, lil_Number* speedRet);
void lil_getOptRect(lua_State* L, int i, const char* key, int* xr, int* yr, int* wr, int* hr);
void lil_getOptColour(lua_State* L, int i, const char* key, lil_Colour* c);
int lil_constrainRectImg(lua_State* L, const lil_Image* bot, int* bx, int* by, const lil_Image* top, int* tx, int* ty, int* w, int* h);
int lil_constrainRect(lua_State* L, const lil_Image* bot, int* bx, int* by, int* w, int* h);
