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Jonas Maebe 8b0301409a + i386/iphonesim target for the new iPhoneSimulator in Xcode 3.2.4 and 
later: the same as i386/darwin, except
      a) uses the non-fragile Objective-C ABI/runtime
      b) does not require stubs for direct calls/jumps (not required for
         i386/darwin under 10.6 and later either, but still generated
         there for backwards compatibility)
      c) only the same packages are enabled as for ARM/Darwin
      d) MacOSAll is compiled specifically for the iPhoneSimulator SDK
    This target also defines the symbol "darwin" apart from the target
    name "iphonesim" for source code compatibility reasons.

git-svn-id: trunk@16065 -
2010-09-29 21:56:47 +00:00
..
examples + i386/iphonesim target for the new iPhoneSimulator in Xcode 3.2.4 and 2010-09-29 21:56:47 +00:00
src * (again :-( ) make cdecl the default calling convention for everything except Windows and fix compilation under OS/2 2010-04-11 11:57:46 +00:00
fpmake.pp * removed old gd headers (were alread disabled) 2009-01-24 01:29:28 +00:00
Makefile + i386/iphonesim target for the new iPhoneSimulator in Xcode 3.2.4 and 2010-09-29 21:56:47 +00:00
Makefile.fpc * Makefiles version 2.5.1 2009-08-13 21:21:28 +00:00
README.txt * added .txt extensions to all README, TODO and COPYING files 2009-02-28 17:34:08 +00:00

README.txt 

This is the interface unit for the gd library, version 1.8.4.
The gd library is a library to produce graphics files (jpeg,png and wbmp)
available from http://www.boutell.com/gd/.

The gd unit is a straight translation of the library headers.
It has some additional calls which make it more pascal like:

{overloaded pascal functions}
function fopen(a,b:string):pFile;
procedure gdImageChar(im:gdImagePtr; f:gdFontPtr; x:longint; y:longint; c:char; color:longint);
procedure gdImageCharUp(im:gdImagePtr; f:gdFontPtr; x:longint; y:longint; c:char; color:longint); 
procedure gdImageString(im:gdImagePtr; f:gdFontPtr; x:longint; y:longint; s:string;  color:longint); 
procedure gdImageStringUp(im:gdImagePtr; f:gdFontPtr; x:longint; y:longint; s:string; color:longint); 
procedure gdImageString16(im:gdImagePtr; f:gdFontPtr; x:longint; y:longint; s:string; color:longint); 
procedure gdImageStringUp16(im:gdImagePtr; f:gdFontPtr; x:longint; y:longint; s:string; color:longint); 
{$ifdef hasttf}
function  gdImageStringTTF(im:PgdImage; brect:Plongint; fg:longint; fontlist:string; ptsize:double; angle:double; x:longint; y:longint; astring:string): string;
function  gdImageStringFT(im:PgdImage; brect:Plongint; fg:longint; fontlist:string; ptsize:double; angle:double; x:longint; y:longint; astring:string):string;
{$endif}

These functions will work with both ansistrings and shortstrings; The unit
can be compiled in both the {$H+} as the {$H-} state.

The hasttf define should be defined for libraries which have TTF2 lib 
support compiled in.

The gdtest example is adapted from the example of the gd unit by Mike Bradbery.
It shows how to use the pascal-like functions in the gd unit instead of the
raw C like functions which use pchars.

usage:
 gdtest chart.png

the gdtestcgi example shows how to output an image to standard output,
this can be used for CGI scripts.

Michael.