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#include <lua.h>
#include <honeysuckle.h>
#include "gl/glad/glad.h"
#include <GLFW/glfw3.h>
#define NANOVG_GL3_IMPLEMENTATION
#include <nanovg.h>
#include <nanovg_gl.h>
#include "vector.h"
static const char *nvg_ctx_tname = "nvg.Context";
/* --===== contexts =====-- */
int nvg_context(lua_State *L)
{
struct NVGcontext **vg = lua_newuserdata(L, sizeof(struct NVGcontext *));
*vg = nvgCreateGL3(NVG_ANTIALIAS | NVG_STENCIL_STROKES);
luaL_getmetatable(L, nvg_ctx_tname);
lua_setmetatable(L, -2);
return 1;
}
int nvg_delete(lua_State *L)
{
struct NVGcontext **vg = luaL_checkudata(L, 1, nvg_ctx_tname);
nvgDeleteGL3(*vg);
return 0;
}
/* --===== frames =====-- */
int nvg_begin_frame(lua_State *L)
{
struct NVGcontext **vg = luaL_checkudata(L, 1, nvg_ctx_tname);
float width = luaL_checknumber(L, 2);
float height = luaL_checknumber(L, 3);
float pixelRatio = luaL_checknumber(L, 4);
nvgBeginFrame(*vg, width, height, pixelRatio);
return 0;
}
int nvg_cancel_frame(lua_State *L)
{
struct NVGcontext **vg = luaL_checkudata(L, 1, nvg_ctx_tname);
nvgCancelFrame(*vg);
return 0;
}
int nvg_end_frame(lua_State *L)
{
struct NVGcontext **vg = luaL_checkudata(L, 1, nvg_ctx_tname);
nvgEndFrame(*vg);
return 0;
}
/* --===== complete =====-- */
void setup_nvg(lua_State *L, int honey_tbl)
{
luaL_newmetatable(L, nvg_ctx_tname);
lua_pushcfunction(L, nvg_delete);
lua_setfield(L, -2, "__gc");
lua_pop(L, 1);
hs_create_table(L,
hs_str_cfunc("Context", nvg_context),
hs_str_cfunc("BeginFrame", nvg_begin_frame),
hs_str_cfunc("CancelFrame", nvg_cancel_frame),
hs_str_cfunc("EndFrame", nvg_end_frame),
);
lua_setfield(L, honey_tbl, "nvg");
}
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