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/** \file
* \brief IM Lua 5 Binding
*
* See Copyright Notice in im_lib.h
* $Id: imlua_aux.c,v 1.1 2008/10/17 06:16:32 scuri Exp $
*/
#include <memory.h>
#include <stdlib.h>
#include <string.h>
#include "im.h"
#include "im_image.h"
#include "im_util.h"
#include <lua.h>
#include <lauxlib.h>
#include "imlua.h"
#include "imlua_aux.h"
#include "imlua_image.h"
/*****************************************************************************\
\*****************************************************************************/
int imlua_getn (lua_State *L, int index)
{
int n;
lua_pushstring(L, "table");
lua_gettable(L, LUA_GLOBALSINDEX);
lua_pushstring(L, "getn");
lua_gettable(L, -2);
lua_pushvalue(L, index);
lua_call(L, 1, 1);
n = luaL_checkint(L, -1);
lua_pop(L, 2);
return n;
}
/*****************************************************************************\
Creates an int array.
\*****************************************************************************/
int imlua_newarrayint (lua_State *L, int *value, int count, int start)
{
int i;
lua_newtable(L);
for (i = 0; i < count; i++)
{
lua_pushnumber(L, value[i]);
lua_rawseti(L, -2, i+start);
}
return 1;
}
/*****************************************************************************\
Creates an unsigned long array.
\*****************************************************************************/
int imlua_newarrayulong (lua_State *L, unsigned long *value, int count, int start)
{
int i;
lua_newtable(L);
for (i = 0; i < count; i++)
{
lua_pushnumber(L, value[i]);
lua_rawseti(L, -2, i+start);
}
return 1;
}
/*****************************************************************************\
Creates a float array.
\*****************************************************************************/
int imlua_newarrayfloat (lua_State *L, float *value, int count, int start)
{
int i;
lua_newtable(L);
for (i = 0; i < count; i++)
{
lua_pushnumber(L, value[i]);
lua_rawseti(L, -2, i+start);
}
return 1;
}
/*****************************************************************************\
Retrieve an int array.
\*****************************************************************************/
int *imlua_toarrayint (lua_State *L, int index, int *count, int start)
{
int i, n;
int *value = NULL;
if (lua_istable(L, index))
{
n = imlua_getn(L, index);
if (start == 0) n++;
if (count) *count = n;
value = (int*) malloc (sizeof(int) * n);
for (i = 0; i < n; i++)
{
lua_rawgeti(L, index, i+start);
value[i] = luaL_checkint(L, -1);
lua_pop(L, 1);
}
}
return value;
}
/*****************************************************************************\
Retrieve an ulong array.
\*****************************************************************************/
unsigned long *imlua_toarrayulong (lua_State *L, int index, int *count, int start)
{
int i, n;
unsigned long *value = NULL;
if (lua_istable(L, index))
{
n = imlua_getn(L, index);
if (start == 0) n++;
if (count) *count = n;
value = (unsigned long*) malloc (sizeof(unsigned long) * n);
for (i = 0; i < n; i++)
{
lua_rawgeti(L, index, i+start);
value[i] = luaL_checkint(L, -1);
lua_pop(L, 1);
}
}
return value;
}
/*****************************************************************************\
Retrieve a float array.
\*****************************************************************************/
float *imlua_toarrayfloat (lua_State *L, int index, int *count, int start)
{
int i, n;
float *value = NULL;
if (lua_istable(L, index))
{
n = imlua_getn(L, index);
if (start == 0) n++;
if (count) *count = n;
value = (float*) malloc (sizeof(float) * n);
for (i = 0; i < n; i++)
{
lua_rawgeti(L, index, i+start);
value[i] = (float) luaL_checknumber(L, -1);
lua_pop(L, 1);
}
}
return value;
}
/*****************************************************************************\
Creates a bit mask based on a string formatted as "11000110".
\*****************************************************************************/
unsigned char imlua_checkmask (lua_State *L, int index)
{
int i;
unsigned char mask = 0;
const char *str = luaL_checkstring(L, index);
if (strlen(str) != 8)
luaL_argerror(L, index, "invalid mask, must have 8 elements");
for (i = 0; i < 8; i++)
{
char c = str[i];
if (c != '0' && c != '1')
luaL_argerror(L, index, "invalid mask, must have 0s or 1s only");
mask |= (c - '0') << (7 - i);
}
return mask;
}
/*****************************************************************************\
Checks data_type and color_space of an image. If it doesn't match throw a lua error.
\*****************************************************************************/
void imlua_checktype (lua_State *L, int index, imImage *image, int color_space, int data_type)
{
if (image->data_type != data_type)
{
char msg[100] = "image data type must be ";
strcat(msg, imDataTypeName(data_type));
luaL_argerror(L, index, msg);
}
if (image->color_space != color_space)
{
char msg[100] = "image color space must be ";
strcat(msg, imColorModeSpaceName(color_space));
luaL_argerror(L, index, msg);
}
}
/*****************************************************************************\
Checks color_space of an image. If it doesn't match throw a lua error.
\*****************************************************************************/
void imlua_checkcolorspace (lua_State *L, int index, imImage *image, int color_space)
{
if (image->color_space != color_space)
{
char msg[100] = "image color space must be ";
strcat(msg, imColorModeSpaceName(color_space));
luaL_argerror(L, index, msg);
}
}
/*****************************************************************************\
Checks a data_type of an image. If it doesn't match throw a lua error.
\*****************************************************************************/
void imlua_checkdatatype (lua_State *L, int index, imImage *image, int data_type)
{
if (image->data_type != data_type)
{
char msg[100] = "image data type must be ";
strcat(msg, imDataTypeName(data_type));
luaL_argerror(L, index, msg);
}
}
/*****************************************************************************\
Checks if the size of the two images are equal. If it doesn't match throw a lua error.
\*****************************************************************************/
void imlua_matchsize(lua_State *L, imImage *image1, imImage *image2)
{
imlua_matchcheck(L, imImageMatchSize(image1, image2), "images must have the same size");
}
void imlua_matchcolor(lua_State *L, imImage *image1, imImage *image2)
{
imlua_matchcheck(L, imImageMatchColor(image1, image2), "images must have the same data type and color space");
}
void imlua_matchdatatype(lua_State *L, imImage *image1, imImage *image2)
{
imlua_matchcheck(L, imImageMatchDataType(image1, image2), "images must have the same size and data type");
}
void imlua_matchcolorspace(lua_State *L, imImage *image1, imImage *image2)
{
imlua_matchcheck(L, imImageMatchColorSpace(image1, image2), "images must have the same size and color space");
}
void imlua_match(lua_State *L, imImage *image1, imImage *image2)
{
imlua_matchcheck(L, imImageMatch(image1, image2), "images must have the same size, data type and color space");
}
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