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#include <lua.h>
#include <honeysuckle.h>
#include <cairo/cairo.h>
/* assimp provides its own stb_image implementation */
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
#include "image.h"
int empty(lua_State *L);
int load_image(lua_State *L);
int free_image(lua_State *L);
void setup_image(lua_State *L, int honey_index)
{
hs_create_table(L,
/* basic images */
hs_str_cfunc("null", empty),
hs_str_cfunc("load", load_image),
hs_str_cfunc("destroy", free_image),
);
lua_setfield(L, honey_index, "image");
}
/* --===== basic images =====-- */
int empty(lua_State *L)
{
lua_pushlightuserdata(L, NULL);
return 1;
}
int load_image(lua_State *L)
{
char *filename;
lua_Integer requested_channels;
hs_parse_args(L, hs_str(filename), hs_int(requested_channels));
int width, height, channels;
unsigned char *data = stbi_load(filename, &width, &height, &channels, requested_channels);
if (data == NULL) hs_throw_error(L, "failed to load image '%s'", filename);
lua_pushlightuserdata(L, data);
lua_pushinteger(L, width);
lua_pushinteger(L, height);
lua_pushinteger(L, channels);
return 4;
}
int free_image(lua_State *L)
{
void *data;
hs_parse_args(L, hs_light(data));
stbi_image_free(data);
return 0;
}
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