From 2b70507615b2611fce4294c65bec7264644e2665 Mon Sep 17 00:00:00 2001 From: scuri Date: Fri, 16 Oct 2009 20:20:07 +0000 Subject: *** empty log message *** --- html/en/cdlua.html | 76 ++++++++++++++++++++++++++++++------------------------ 1 file changed, 42 insertions(+), 34 deletions(-) (limited to 'html/en/cdlua.html') diff --git a/html/en/cdlua.html b/html/en/cdlua.html index 750081b..e3409c0 100644 --- a/html/en/cdlua.html +++ b/html/en/cdlua.html @@ -1,8 +1,9 @@ - + Lua Binding + @@ -13,52 +14,59 @@

All the CD functions are available in Lua, with a few exceptions. We call it - CDLua. To use them the - general application will do require"cdlua", and require"cdluaxxxx" to all other - secondary libraries that are needed. The functions and definitions will be available - under the table "cd" using the following name rules:

- 
cdXxx  -> cd.Xxx    (for functions)
wdXxx  -> cd.wXxx   (for WD functions)
CD_XXX -> cd.XXX    (for definitions)
cdCanvasXXX(canvas,... => canvas:XXX(...   (for methods)
+ CDLua. To use them the general application will do + require"cdlua", and require"cdluaxxxx" to all other secondary libraries that + are needed. The functions and definitions will be available under the table + "cd" using the following name rules:

+ 
cdXxx  -> cd.Xxx    (for functions)
wdXxx  -> cd.wXxx   (for WD functions)
CD_XXX -> cd.XXX    (for definitions)
cdCanvasXXX(canvas,... => canvas:XXX(...   (for methods)

New functions (without equivalents in C) were implemented to create and - destroy objects that do not exist in C. For instance functions were developed - to create and destroy images, pattern, stipple and palette. All the - metatables have the "tostring" metamethod implemented to help debuging. Some functions were modified to receive those objects as parameters.

+ destroy objects that do not exist in C. For instance functions were + developed to create and destroy images, pattern, stipple and + palette. All the metatables have the "tostring" metamethod implemented + to help debuging. Some functions were modified to receive those objects + as parameters.

- Also the functions which receive values by reference in C were modified. Generally, the values of - parameters that would have their values modified are now returned by the function in the same order.

+ Also the functions which receive values by reference in C were modified. + Generally, the values of parameters that would have their values + modified are now returned by the function in the same order.

- Notice that, as opposed to C, - in which enumeration flags are combined with the bitwise operator OR, in Lua the flags are added arithmetically.

+ Notice that, as opposed to C, in which enumeration flags are + combined with the bitwise operator OR, in Lua the flags are added + arithmetically.

- In Lua all parameters are checked and a Lua error is emitted when the check fails.

+ In Lua all parameters are checked and a Lua error is emitted when the + check fails.

- All the objects are garbage collected by the Lua garbage collector, except - the canvas because there can be different Lua canvases pointing to the same - C canvas. The "tostring" - metamethod of the Lua canvas will print both values, Lua - and C. The equal method will compare the C canvas value.

+ All the objects are garbage collected by the Lua garbage collector, + except the canvas because there can be different Lua canvases pointing + to the same C canvas. The "tostring" metamethod of the Lua canvas will + print both values, Lua and C. The equal method will compare the C canvas + value.

Initialization

Lua 5.1 "require" can be used for all the -CDLua -libraries. You can use require"cdlua" and so on, but the LUA_CPATH -must also contains the following: + CDLua + libraries. You can use require"cdlua" and so on, but the + LUA_CPATH must also contains the following:

-
"./lib?51.so;"    [in UNIX]
+
"./lib?51.so;"    [in UNIX]
 
-".\\?51.dll;"     [in Windows]
+".\\?51.dll;"     [in Windows]
 

-
The LuaBinaries distribution already includes these modifications on the 
-default search path.

-
The simplest form require"cd" 
-and so on, can not be used because there are CD dynamic libraries with names 
-that will conflict with the names used by require during search.

+
The LuaBinaries distribution 
+already includes these modifications on the default search path.

+
The simplest form require"cd" and so on, can not be used 
+because there are CD dynamic libraries with names that will conflict with the 
+names used by require during search.

     

-        Additionally you can statically link the CDLua libraries, but you must call the initialization functions manually. The 
-  cdlua_open function is declared in the header file cdlua.h,
-        see the example below:

+        Additionally you can statically link the CDLua 
+		libraries, but you must call the initialization functions manually. The 
+  cdlua_open function is declared in 
+		the header file cdlua.h, 
+		see the example below:

   
     

       

@@ -91,8 +99,8 @@ that will conflict with the names used by require during search.

 
 
Exchanging Values between C and Lua

 
-  
Because of some applications that interchange the use of CD canvases in Lua and C, we build a 
-  few C functions that are available in "cdlua.h":

+  
Because of some applications that interchange the use of CD canvases in Lua 
+	and C, we build a few C functions that are available in "cdlua.h":

 
 
cdCanvas* cdlua_checkcanvas(lua_State* L, int pos);
 void cdlua_pushcanvas(lua_State* L, cdCanvas* canvas);

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