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|
------------------------------------------------------------------------------
-- Image class
------------------------------------------------------------------------------
local ctrl = {
nick = "image",
parent = iup.WIDGET,
creation = "nns", -- fake definition
callback = {},
createfunc = [[
static int Image (lua_State * L)
{
int w, h, c, num_colors;
unsigned char *pixels;
Ihandle* ih;
char str[20];
if (lua_istable(L, 1))
{
int i, j;
/* get the number of lines */
h = luaL_getn(L, 1);
/* get the number of columns of the first line */
lua_pushnumber(L, 1);
lua_gettable(L, 1);
w = luaL_getn(L, -1);
lua_pop(L, 1);
pixels = (unsigned char *) malloc (h*w);
for (i=1; i<=h; i++)
{
lua_pushnumber(L, i);
lua_gettable(L, 1);
for (j=1; j<=w; j++)
{
int idx = (i-1)*w+(j-1);
lua_pushnumber(L, j);
lua_gettable(L, -2);
pixels[idx] = (unsigned char)lua_tonumber(L, -1);
lua_pop(L, 1);
}
lua_pop(L, 1);
}
ih = IupImage(w,h,pixels);
free(pixels);
num_colors = luaL_getn(L, 2);
num_colors = num_colors>255? 255: num_colors;
for(c=1; c<=num_colors; c++)
{
lua_rawgeti(L, 2, c);
sprintf(str, "%d", c);
IupStoreAttribute(ih, str, lua_tostring(L,-1));
lua_pop(L, 1);
}
}
else
{
w = luaL_checkint(L, 1);
h = luaL_checkint(L, 2);
pixels = iuplua_checkuchar_array(L, 3, w*h);
ih = IupImage(w, h, pixels);
free(pixels);
num_colors = luaL_getn(L, 4);
num_colors = num_colors>256? 256: num_colors;
for(c=1; c<=num_colors; c++)
{
lua_rawgeti(L, 4, c);
sprintf(str, "%d", c-1);
IupStoreAttribute(ih, str, lua_tostring(L,-1));
lua_pop(L, 1);
}
}
iuplua_plugstate(L, ih);
iuplua_pushihandle_raw(L, ih);
return 1;
}
]]
}
function ctrl.createElement(class, param)
if (param.width and param.height and param.pixels) then
return iup.Image(param.width, param.height, param.pixels, param.colors)
else
return iup.Image(param, param.colors)
end
end
iup.RegisterWidget(ctrl)
iup.SetClass(ctrl, "iup widget")
|
