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/*
** Lua eXtended ioctl library
*/
#define lxdrawlib_c
#define LUA_LIB
#include <lua/lprefix.h>
#include <errno.h>
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <lua/lua.h>
#include <lua/lauxlib.h>
#include <lua/lualib.h>
#include <kogata/draw.h>
#include "lxlib.h"
typedef struct {
fb_t *fb;
fb_region_t subregion;
bool has_subregion;
} drawlib_surface;
#define SURFACE "lx.draw.surface"
static int draw_from_fd(lua_State *L) {
int fd = luaL_checkinteger(L, 1);
luaL_checktype(L, 2, LUA_TTABLE);
fb_info_t geom;
geom.width = getintfield(L, 2, "width");
geom.height = getintfield(L, 2, "height");
geom.bpp = getintfield(L, 2, "bpp");
geom.pitch = getintfield(L, 2, "pitch");
geom.memory_model = getintfield(L, 2, "memory_model");
drawlib_surface *s = (drawlib_surface*)lua_newuserdata(L, sizeof(drawlib_surface));
luaL_getmetatable(L, SURFACE);
lua_setmetatable(L, -2);
s->fb = g_fb_from_file(fd, &geom);
if (s->fb == NULL) {
lua_pop(L, 1);
lua_pushnil(L);
} else {
s->subregion.x = s->subregion.y = 0;
s->subregion.w = geom.width;
s->subregion.h = geom.height;
s->has_subregion = false;
}
return 1;
}
static int surface_gc(lua_State *L) {
drawlib_surface *s = (drawlib_surface*)luaL_checkudata(L, 1, SURFACE);
if(s->fb == NULL) {
luaL_error(L, "s->fb == NULL ?");
}
g_decref_fb(s->fb);
s->fb = NULL;
return 0;
}
static int surface_sub(lua_State *L) {
drawlib_surface *s = (drawlib_surface*)luaL_checkudata(L, 1, SURFACE);
int x = luaL_checkinteger(L, 2);
int y = luaL_checkinteger(L, 3);
int w, h;
if (lua_isinteger(L, 4)) {
w = luaL_checkinteger(L, 4);
} else {
w = s->subregion.w - x;
}
if (lua_isinteger(L, 5)) {
h = luaL_checkinteger(L, 5);
} else {
h = s->subregion.h - y;
}
if (x < 0 || y < 0 || w < 0 || h < 0)
luaL_error(L, "negative argument is invalid");
if (x+w > (int)s->subregion.w) luaL_error(L, "w too big");
if (y+h > (int)s->subregion.h) luaL_error(L, "h too big");
drawlib_surface *s2 = (drawlib_surface*)lua_newuserdata(L, sizeof(drawlib_surface));
luaL_getmetatable(L, SURFACE);
lua_setmetatable(L, -2);
s2->fb = s->fb;
s2->has_subregion = true;
s2->subregion.x = s->subregion.x + x;
s2->subregion.y = s->subregion.y + y;
s2->subregion.w = w;
s2->subregion.h = h;
return 1;
}
static int surface_rgb(lua_State *L) {
drawlib_surface *s = (drawlib_surface*)luaL_checkudata(L, 1, SURFACE);
int r = luaL_checkinteger(L, 2);
int g = luaL_checkinteger(L, 3);
int b = luaL_checkinteger(L, 4);
color_t c = g_color_rgb(s->fb, r, g, b);
lua_pushlightuserdata(L, (void*)c);
return 1;
}
static int surface_plot(lua_State *L) {
drawlib_surface *s = (drawlib_surface*)luaL_checkudata(L, 1, SURFACE);
int x = luaL_checkinteger(L, 2);
int y = luaL_checkinteger(L, 3);
color_t c = (color_t)lx_checklightudata(L, 4);
g_plot(s->fb, x, y, c);
return 0;
}
/* }====================================================== */
static const luaL_Reg drawlib[] = {
{"from_fd", draw_from_fd},
{NULL, NULL}
};
static const luaL_Reg surface_meta[] = {
{"sub", surface_sub},
{"rgb", surface_rgb},
{"plot", surface_plot},
{"__gc", surface_gc},
{NULL, NULL}
};
LUAMOD_API int lx_open_draw (lua_State *L) {
luaL_newlib(L, drawlib);
luaL_newmetatable(L, SURFACE);
luaL_setfuncs(L, surface_meta, 0);
lua_pushvalue(L, -1);
lua_setfield(L, -2, "__index");
lua_pop(L, 1);
return 1;
}
/* vim: set sts=2 ts=2 sw=2 tw=0 et :*/
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