1 files changed, 279 insertions, 0 deletions
diff --git a/src/lua5/imlua_util.c b/src/lua5/imlua_util.c
new file mode 100644
index 0000000..69cfb19
--- /dev/null
+++ b/src/lua5/imlua_util.c
@@ -0,0 +1,279 @@
+/** \file
+ * \brief IM Lua 5 Binding
+ *
+ * See Copyright Notice in im_lib.h
+ * $Id: imlua_util.c,v 1.1 2008/10/17 06:16:32 scuri Exp $
+ */
+
+#include "im.h"
+#include "im_util.h"
+#include "im_image.h"
+
+#include <lua.h>
+#include <lauxlib.h>
+
+#include "imlua.h"
+#include "imlua_aux.h"
+
+/*****************************************************************************\
+ im.ImageDataSize(width, height, color_mode, data_type)
+\*****************************************************************************/
+static int imluaImageDataSize (lua_State *L)
+{
+  int width = luaL_checkint(L, 1);
+  int height = luaL_checkint(L, 2);
+  int color_mode = luaL_checkint(L, 3);
+  int data_type = luaL_checkint(L, 4);
+
+  lua_pushnumber(L, imImageDataSize(width, height, color_mode, data_type));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.ImageLineSize(width, color_mode, data_type)
+\*****************************************************************************/
+static int imluaImageLineSize (lua_State *L)
+{
+  int width = luaL_checkint(L, 1);
+  int color_mode = luaL_checkint(L, 2);
+  int data_type = luaL_checkint(L, 3);
+
+  lua_pushnumber(L, imImageLineSize(width, color_mode, data_type));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.ImageLineCount(width, color_mode)
+\*****************************************************************************/
+static int imluaImageLineCount (lua_State *L)
+{
+  int width = luaL_checkint(L, 1);
+  int color_mode = luaL_checkint(L, 2);
+
+  lua_pushnumber(L, imImageLineCount(width, color_mode));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.ImageCheckFormat(width, color_mode)
+\*****************************************************************************/
+static int imluaImageCheckFormat (lua_State *L)
+{
+  int color_mode = luaL_checkint(L, 1);
+  int data_type = luaL_checkint(L, 2);
+
+  lua_pushboolean(L, imImageCheckFormat(color_mode, data_type));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.ColorModeSpaceName(color_mode)
+\*****************************************************************************/
+static int imluaColorModeSpaceName (lua_State *L)
+{
+  lua_pushstring(L, imColorModeSpaceName(luaL_checkint(L, 1)));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.ColorModeDepth(color_mode)
+\*****************************************************************************/
+static int imluaColorModeDepth (lua_State *L)
+{
+  lua_pushnumber(L, imColorModeDepth(luaL_checkint(L, 1)));
+  return 1;
+}
+
+/*****************************************************************************\
+ 
+\*****************************************************************************/
+
+/*****************************************************************************\
+ im.ColorModeSpace(color_mode)
+\*****************************************************************************/
+static int imluaColorModeSpace (lua_State *L)
+{
+  lua_pushnumber(L, imColorModeSpace(luaL_checkint(L, 1)));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.ColorModeHasAlpha(color_mode)
+\*****************************************************************************/
+static int imluaColorModeMatch (lua_State *L)
+{
+  lua_pushboolean(L, imColorModeMatch(luaL_checkint(L, 1), luaL_checkint(L, 1)));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.ColorModeHasAlpha(color_mode)
+\*****************************************************************************/
+static int imluaColorModeHasAlpha (lua_State *L)
+{
+  lua_pushboolean(L, imColorModeHasAlpha(luaL_checkint(L, 1)));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.ColorModeIsPacked(color_mode)
+\*****************************************************************************/
+static int imluaColorModeIsPacked (lua_State *L)
+{
+  lua_pushboolean(L, imColorModeIsPacked(luaL_checkint(L, 1)));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.ColorModeIsTopDown(color_mode)
+\*****************************************************************************/
+static int imluaColorModeIsTopDown (lua_State *L)
+{
+  lua_pushboolean(L, imColorModeIsTopDown(luaL_checkint(L, 1)));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.ColorModeToBitmap(color_mode)
+\*****************************************************************************/
+static int imluaColorModeToBitmap (lua_State *L)
+{
+  lua_pushnumber(L, imColorModeToBitmap(luaL_checkint(L, 1)));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.ColorModeIsBitmap
+\*****************************************************************************/
+static int imluaColorModeIsBitmap (lua_State *L)
+{
+  int color_mode = luaL_checkint(L, 1);
+  int data_type = luaL_checkint(L, 2);
+
+  lua_pushboolean(L, imColorModeIsBitmap(color_mode, data_type));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.DataTypeSize(data_type)
+\*****************************************************************************/
+static int imluaDataTypeSize (lua_State *L)
+{
+  lua_pushnumber(L, imDataTypeSize(luaL_checkint(L, 1)));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.DataTypeName(data_type)
+\*****************************************************************************/
+static int imluaDataTypeName (lua_State *L)
+{
+  lua_pushstring(L, imDataTypeName(luaL_checkint(L, 1)));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.DataTypeIntMax(data_type)
+\*****************************************************************************/
+static int imluaDataTypeIntMax(lua_State *L)
+{
+  lua_pushnumber(L, imDataTypeIntMax(luaL_checkint(L, 1)));
+  return 1;
+}
+
+/*****************************************************************************\
+ im.DataTypeIntMin(data_type)
+\*****************************************************************************/
+static int imluaDataTypeIntMin(lua_State *L)
+{
+  lua_pushnumber(L, imDataTypeIntMin(luaL_checkint(L, 1)));
+  return 1;
+}
+
+/***************************************************************************\
+* Creates a color as a light userdata. The color value is                   *
+* placed in the (void *) value. Not beautiful, but works best.              *
+* im.ColorEncode(r, g, b: number) -> (c: color)                             *
+\***************************************************************************/
+static int imlua_colorencode(lua_State *L)
+{
+  int red_f, green_f, blue_f;
+  unsigned char red_i, green_i, blue_i;
+  long int color_i;
+
+  red_f   = luaL_checkint(L, 1);
+  green_f = luaL_checkint(L, 2);
+  blue_f  = luaL_checkint(L, 3);
+
+  if (red_f < 0 || red_f > 255)
+    luaL_argerror(L, 1, "color components values should be in range [0, 255]");
+  if (green_f < 0 || green_f > 255)
+    luaL_argerror(L, 2, "color components values should be in range [0, 255]");
+  if (blue_f < 0 ||  blue_f > 255)
+    luaL_argerror(L, 3, "color components values should be in range [0, 255]");
+  
+  red_i   = (unsigned char) (red_f);
+  green_i = (unsigned char) (green_f);
+  blue_i  = (unsigned char) (blue_f);
+
+  color_i = imColorEncode(red_i, green_i, blue_i);
+  lua_pushlightuserdata(L, (void *)color_i);
+  
+  return 1;
+}
+
+/***************************************************************************\
+* Decodes a color previously created.                                       *
+* im.ColorDecode(c: color) -> (r, g, b: number)                             *
+\***************************************************************************/
+static int imlua_colordecode(lua_State *L)
+{
+  long int color_i;
+  unsigned char red_i, green_i, blue_i;
+
+  if (!lua_islightuserdata(L, 1))
+    luaL_argerror(L, 1, "color must be a light user data");
+
+  color_i = (long int) lua_touserdata(L,1);
+
+  imColorDecode(&red_i, &green_i, &blue_i, color_i);
+  lua_pushnumber(L, red_i);
+  lua_pushnumber(L, green_i);
+  lua_pushnumber(L, blue_i);
+
+  return 3;
+}
+
+static const luaL_reg imutil_lib[] = {
+  {"ImageDataSize", imluaImageDataSize},
+  {"ImageLineSize", imluaImageLineSize},
+  {"ImageLineCount", imluaImageLineCount},
+  {"ImageCheckFormat", imluaImageCheckFormat},
+
+  {"ColorModeSpace", imluaColorModeSpace},
+  {"ColorModeSpaceName", imluaColorModeSpaceName},
+  {"ColorModeDepth", imluaColorModeDepth},
+
+  {"ColorModeToBitmap", imluaColorModeToBitmap},
+  {"ColorModeIsBitmap", imluaColorModeIsBitmap},
+  {"ColorModeMatch", imluaColorModeMatch},
+  {"ColorModeHasAlpha", imluaColorModeHasAlpha},
+  {"ColorModeIsPacked", imluaColorModeIsPacked},
+  {"ColorModeIsTopDown", imluaColorModeIsTopDown},
+
+  {"DataTypeSize", imluaDataTypeSize},
+  {"DataTypeName", imluaDataTypeName},
+  {"DataTypeIntMax", imluaDataTypeIntMax},
+  {"DataTypeIntMin", imluaDataTypeIntMin},
+
+  {"ColorEncode", imlua_colorencode},
+  {"ColorDecode", imlua_colordecode},
+
+  {NULL, NULL}
+};
+
+void imlua_open_util(lua_State *L)
+{
+  /* "im" table is at the top of the stack */
+  luaL_register(L, NULL, imutil_lib);
+}