changelog

基于SDL的framegrabber适用于简单的UI下的webcam应用开发

CHANGES/VERSION
===============

Ver 2.0.12 - Mon Aug 30 09:04:11 EDT 2004
* piecolor naming fix
* primitive API change to 'filledPie'
* introduction of some const variables


Ver 2.0.11 - Thu May 13 09:42:34 EDT 2004
* added pieRGBA/pieColor primitive (non filled pie)
* added QNX6 build patch
* use $(includedir)/SDL to automake setup
* updated README
* added 2x2 box & pie tests
* added dynamic font setup routine
* added sample font files to the Fonts directory
* added font test program
* string routines changed to use const char
* fixed TestRotozoom clear color bug


Ver 2.0.10 - Thu Dec 11 09:40:08 EST 2003
* Updated "missing" script to newer version to avoid build errors
* Fixed filled polygon int32 overflow error in calculation
* Updated RPM spec file for new website path
* Added micro version number to .h file


Ver 2.0.9 - Mon Oct 27 10:03:18 EST 2003
* Fixed "filled-box width too small by 1 bug" for A=255
* Wrong versioning in .h file


Ver 2.0.8 - Wed Jul 16 16:18:13 EDT 2003
* Modified filledPolygon drawing
  (The edges of a filled polygon and a polyline were 
   reported to not intersect correctly. With this fix, the
   edges do still do not intersect 100% due to the difference
   in the algorithms. But now a polygon will never draw 
   outside of the area enclosed by a polyline.)

Ver 2.0.7 - Sun Jun  8 08:17:38 EDT 2003
* Added MacOS X Project Builder code
* changed SDL include to <SDL/SDL.h>
* Added bezier curve


Ver 2.0.6 - Sat May 25 15:12:17 EDT 2002
* Fixed clipping code for most primitives
* Added clipping code for character
* Added VC7 project file


Ver 2.0.5 - n/a
* Removed some unused code


Ver 2.0.4 - Sat Feb  9 22:09:45 EST 2002
* Fixed rectangle drawing bug on edges for A<255
* Added trigons (triangles) as wrapper calls to polygon.


Ver 2.0.3 - Sat Jan 26 10:06:16 EST 2002

* Zipped VisualC directory to avoid EOL problems.
* Fixed aalineColor call (y2 parameter was y1).
* Fixed rotozoom bug that caused black or undefined pixels on edges.


Ver 2.0.2 - Sat Jan 19 21:41:28 EST 2002
* Removed dependency from GL libraries during compile.
* Added VisualC makefile.


Ver 2.0.1 - Sat Jan  5 22:08:17 EST 2002

* New better quality aacircle/aaellipse code
* Better locking optimization for a 4-8% speed improvement on some
  primitives (line, aaline, circle, ellipse)


Ver 2.0 - Sat Dec 29 16:27:57 EST 2001

* Initial release of SDL_gfx based on SDL_gfxPrimitives and SDL_rotozoom
  code.
* Added framerate code and testprogram.
* Added imageFilters code and testprogram.
* New distribution: source code, README, configure system etc.


Previous versions
=================

SDL_gfxPrimitives:
------------------

Ver 1.5 - Mon Jul  2 11:27:40 EDT 2001

* New alpha blending code for factor 4 speedups if a<255 on all functions.
* Modified include file for W32 DLL support.
* Added VC6 project files for DLL and static library building.
* Added simple AA-circle/-ellipse routine - quality needs improvement.
* Removed 32bit shift on 64bit number from aaline for better portability
  across platforms.
* Removed a couple more compiler warnings (i.e. purely cosmetic fix).

Ver 1.4 - Sun Jun  3 11:52:07 EDT 2001

* Fixed hline, vline and rectangle clipping and result codes.
* Fixed AA-line arithmetic (was alpha subtraction, should be alpha ratio).
* More caching on fonts for speedups.
* More pointer checks in several places.
* New special cases for ellipses for rx=0/ry=0.
* Same sanity checks for circles/ellipses.
* Same return code for polygon/filledpolygon.

Ver 1.3 - Thu May 31 12:41:35 EDT 2001

* Minor cleanups and fixes (gcc -Wall is your friend).

Ver 1.2 again - Thu Apr  5 07:50:57 EDT 2001

* Fixed lineRGBA and aalineRGBA calls (had coordinate-passing mixed up twice,
  thanks Lion for pointing this out)

Ver 1.2 - Wed Apr  4 08:32:42 EDT 2001

* Changed to a dual, you-have-the-choice(TM) licencing system 
  to accomodate GPL developments using SDL_gfxPrimitives.
* Some minor fixes (thanks Karl).
* All routines return proper result code now.
* Clipping for aaline, circle and ellipse.

Ver 1.1 - Thu Mar 22 15:28:27 EST 2001

* Added code for Alpha=255 pixel drawing through direct memory writes to all routines
resulting in a much faster performance (factor 5 to 20) for non transparent pixels.
* New test and benchmark program with better info and nicer look.
* More info in README. Proper licence file. Comment cleanup.

Ver 1.0 - Fri Mar 16 08:38:07 EST 2001

* Initial release


SDL_rotozoom:
-------------

Ver 1.6 - Mon Nov 19 21:19:26 EST 2001
* Added interpolation to alpha channel (simplifies code)
* Ran the sourcecode through 'indent' for better readability

Ver 1.5 - Sat Jul  7 13:02:07 EDT 2001
* Added project files (VisualC.zip) and modifications for VC project building.
* Fixed old versioning in configure.in file.
* Fixed LICENSE file and LGPL source reference.

Ver 1.4 - Mon Jun  4 12:15:31 EDT 2001
* Removed SDL_SoftStretch call again in favour of an internal zoom routine.
* Added new zoomSurface() function with seperate X and Y zoom factors.

Ver 1.3 - Thu May 31 08:37:36 EDT 2001
* Modified code to handle RGBA or ABGR source surfaces transparently.
* More error checking, source surface locking.
* Slighly expanded test program with event handling.

Ver 1.2 - Wed May 30 18:18:05 EDT 2001
* Fixed the completely broken 32bit routine's pointer arithmetic.
* Uses SDL_SoftStretch in certain cases (angle=0, smooth=0).
* Convert source surface on the fly if not 8/32bit.
* Added license file - was empty before (duh).

Ver 1.1 - Wed May 23 15:04:42 EDT 2001
* Added automake/autoconf scripts and testprogram.

Ver 1.0 - Fri Mar 16 08:16:06 EST 2001
* Initial release