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#include <lua.h>
#include <lauxlib.h>
#include "api.h"
#include "fontdesc.h"
#include "renderer.h"
#include "rencache.h"
static int f_load(lua_State *L) {
const char *filename = luaL_checkstring(L, 1);
float size = luaL_checknumber(L, 2);
unsigned int font_options = 0;
if (lua_gettop(L) > 2 && lua_istable(L, 3)) {
lua_getfield(L, 3, "antialiasing");
if (lua_isstring(L, -1)) {
const char *antialiasing = lua_tostring(L, -1);
if (antialiasing) {
if (strcmp(antialiasing, "grayscale") == 0) {
font_options |= RenFontGrayscale;
} else if (strcmp(antialiasing, "subpixel") == 0) {
font_options |= RenFontSubpixel;
} else {
return luaL_error(L, "error in renderer.font.load, unknown antialiasing option: \"%s\"", antialiasing);
}
}
}
lua_pop(L, 1);
lua_getfield(L, 3, "hinting");
if (lua_isstring(L, -1)) {
const char *hinting = lua_tostring(L, -1);
if (hinting) {
if (strcmp(hinting, "slight") == 0) {
font_options |= RenFontHintingSlight;
} else if (strcmp(hinting, "none") == 0) {
font_options |= RenFontHintingNone;
} else if (strcmp(hinting, "full") == 0) {
font_options |= RenFontHintingFull;
} else {
return luaL_error(L, "error in renderer.font.load, unknown hinting option: \"%s\"", hinting);
}
}
}
lua_pop(L, 1);
}
if (ren_verify_font(filename)) {
luaL_error(L, "failed to load font");
}
FontDesc *font_desc = lua_newuserdata(L, font_desc_alloc_size(filename));
font_desc_init(font_desc, filename, size, font_options);
luaL_setmetatable(L, API_TYPE_FONT);
return 1;
}
static int f_copy(lua_State *L) {
FontDesc *self = luaL_checkudata(L, 1, API_TYPE_FONT);
float size;
if (lua_gettop(L) >= 2) {
size = luaL_checknumber(L, 2);
} else {
size = self->size;
}
FontDesc *new_font_desc = lua_newuserdata(L, font_desc_alloc_size(self->filename));
font_desc_init(new_font_desc, self->filename, size, self->options);
luaL_setmetatable(L, API_TYPE_FONT);
return 1;
}
static int f_set_tab_size(lua_State *L) {
FontDesc *self = luaL_checkudata(L, 1, API_TYPE_FONT);
int n = luaL_checknumber(L, 2);
font_desc_set_tab_size(self, n);
return 0;
}
static int f_gc(lua_State *L) {
FontDesc *self = luaL_checkudata(L, 1, API_TYPE_FONT);
font_desc_clear(self);
return 0;
}
static int f_get_width(lua_State *L) {
FontDesc *self = luaL_checkudata(L, 1, API_TYPE_FONT);
const char *text = luaL_checkstring(L, 2);
/* By calling ren_get_font_width with NULL as third arguments
we will obtain the width in points. */
int w = ren_get_font_width(self, text, NULL);
lua_pushnumber(L, w);
return 1;
}
static int f_subpixel_scale(lua_State *L) {
FontDesc *self = luaL_checkudata(L, 1, API_TYPE_FONT);
lua_pushnumber(L, ren_get_font_subpixel_scale(self));
return 1;
}
static int f_get_width_subpixel(lua_State *L) {
FontDesc *self = luaL_checkudata(L, 1, API_TYPE_FONT);
const char *text = luaL_checkstring(L, 2);
int subpixel_scale;
/* We need to pass a non-null subpixel_scale pointer to force
subpixel width calculation. */
lua_pushnumber(L, ren_get_font_width(self, text, &subpixel_scale));
return 1;
}
static int f_get_height(lua_State *L) {
FontDesc *self = luaL_checkudata(L, 1, API_TYPE_FONT);
lua_pushnumber(L, ren_get_font_height(self) );
return 1;
}
static int f_get_size(lua_State *L) {
FontDesc *self = luaL_checkudata(L, 1, API_TYPE_FONT);
lua_pushnumber(L, self->size);
return 1;
}
static int f_set_size(lua_State *L) {
FontDesc *self = luaL_checkudata(L, 1, API_TYPE_FONT);
float new_size = luaL_checknumber(L, 2);
font_desc_clear(self);
self->size = new_size;
return 0;
}
static const luaL_Reg lib[] = {
{ "__gc", f_gc },
{ "load", f_load },
{ "copy", f_copy },
{ "set_tab_size", f_set_tab_size },
{ "get_width", f_get_width },
{ "get_width_subpixel", f_get_width_subpixel },
{ "get_height", f_get_height },
{ "subpixel_scale", f_subpixel_scale },
{ "get_size", f_get_size },
{ "set_size", f_set_size },
{ NULL, NULL }
};
int luaopen_renderer_font(lua_State *L) {
luaL_newmetatable(L, API_TYPE_FONT);
luaL_setfuncs(L, lib, 0);
lua_pushvalue(L, -1);
lua_setfield(L, -2, "__index");
return 1;
}
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