Amiga Format CD 41/Amiga Format CD41 (1999-06)(Future Publishing)(GB)[!][issue 1999-07].iso/-seriously_amiga-/programming/other/guigfxlib/doc/history

Text File | 1999-04-19 | 17KB | 446 lines

history
-------------------------

v15.1
    - render.library crashed with an ILLEGAL exception
      (caused by a memhandler leak) when a HAM picture
      was loaded with a v42 ILBM datatype.

    - CreatePictureMask() failed to create scaled masks.
      fixed.

v15
    - added a few basic examples to the documentation.
    - added GGFX_UseMask for LoadPicture(). if TRUE and supported
      by the datatype, a mask will be read and included to the
      picture as an alpha-channel.
    - new function: CreatePictureMask(). This function creates
      a single-bitplane mask from a picture's alpha-channel. it
      can be passed to graphics.library/BltMaskBitMapRastPort().
    - CreatePictureBitMap() now accepts a NULL picture. This can
      be used to allocate a blank bitmap that can be blitted
      to a drawhandle efficiently.

v14
    - minor bug in MakePicture() fixed: when a blank
      picture was created (data = NULL), the independent
      flag was internally not set to TRUE.
    - PICMTHD_AUTOCROP cropped blank pictures down to zero
      pixels - fixed. (oops! evil crashes :-)

v13
    - minor internal changes

v12
    - added picture method PICMTHD_AUTOCROP
    - the includes did not contain the definitions for
      PICMTHD_NEGATIVE. fixed.

v11
    - the Tower JPEG codec is no longer supported directly.
    - added documentation for the v9 directdraw functions.

v10.2
    - env/usescalepixelarray is no longer considered for
      CreatePictureBitMap(). this function always uses
      internal scaling routines now.

v10.1
    - fixed a semaphore lockup problem when MakePicture() failed due to
      a lack of memory
    - parts of the library have been restructured.
    - internal bitmap handling rewritten.
    - MakePicture() has been rewritten. lots of sanity checks have been added.
      bitmap conversion is more efficient. scaling has been included.
    - fixed DirectDrawTruecolor() on truecolor screens without scaling
    - rewrote ReadPicture(), added tags GGFX_AspectX, GGFX_AspectY,
      GGFX_DestWidth, GGFX_DestHeight, and GGFX_ModeID.
    - added picture method PICMTHD_NEGATIVE

v10
    - major stability update! thanks to Luca Longone, who encountered
      MystiCube crashing when started multiple times. the internal
      memory manager is now reset to RMHTYPE_PUBLIC, and no problems
      occured with 4 mysticubes, 2 mysticviews in slideshow mode,
      rgbplasma, plus viewworld running simultaneously for many hours
      under heavy debugging conditions.

      public memory management seems to solve all outstanding problems,
      but it causes more memory fragmentation. a more sophisticated
      memory manager is being planned.

    - added documentation for Source-Tags in picture method
      PICMTHD_MIXALPHA.

v9.0
    - CreatePictureBitmap() now returns gently with a NULL pointer
      when no valid picture or drawhandles were specified.
    - added CreatePictureMask(). (experimental, not for public use yet)

v8.5
    - added env variable AUTODITHERTHRESHOLD
    - env variables are now considered only once, when the
      library is opened.
    - forgot to document PICMTHD_SET in the autodocs. fixed.
    - added method PICMTHD_CHECKAUTODITHER.

v8.4
    - GGFX_AutoDither is now considered by DrawPicture()


v8.3
    - fixed CreateDirectDrawHandle(). when the input and
      output dimensions were the same, this function returned
      NULL instead of a valid directdrawhandle.

    - added support for texture-mapping and rotating while
      drawing (no additional buffers required). currently
      not documented and for internal use only.

    - added env variable guigfx/USEWPA8. it is used when the
      drawhandle is on a native Amiga screenmode. when set to
      0, guigfx.library will use an internal c2p routine.
      when set to 1, guigfx.library will call WritePixelArray8(),
      WritePixelLine8() or WriteChunkyPixels().

v8.2
    - 12bit (default) drawhandles now use mapping-engines for
      optimized rendering to static palettes (no pen-sharemap
      specified for ObtainDrawHandle()). this is preliminary,
      for test purposes only.

    - fixed PICMTHD_INSERT to support insertion of pictures
      which are both mapped to the same drawhandle. untested yet.

v8.1
    - to end up problems with cybergraphics.library/ScalePixelArray(),
      I've included an ENV variable named guigfx/USESCALEPIXELARRAY
      so that the user may decide. Default is "0", and
      guigfx.library/DrawPicture() uses its internal scaling
      routines. DirectDrawTrueColor() always uses ScalePixelArray()
      with cgfx v41 present.

v8.0
    - added CreateDirectDrawHandle(), DeleteDirectDrawHandle()
      and DirectDrawTrueColor() for optimized drawing of
      RGB data.

    - wowsers, cybergraphics.library/scalepixelarray() seems
      to get faster and buggier with every new cybergraphics
      update. i wonder if the authors still know what's going
      on inside? anyway, i can't really decide whether to use
      it or not. currently, DirectDrawTrueColor() uses it for
      higher performance, and DrawPicture() doesn't for
      accurate scaling without flicker.

v7.2
    - applied Tower JPEG Class license agreements to the
      legal informations.

    - If you want to use the Tower JPEG codec, your program
      has to be in accordance to the respective license
      agreements. Specify the tag GGFX_License for
      IsPicture() and LoadPicture() to use the JPEG codec.
      Otherwise, datatypes are used.

v7.1
    - added picture mehtods PICMTHD_FLIPX and PICMTHD_FLIPY.

v7.0
    - added picture method PICMTHD_INSERT.

v6.2
    - improved drawing speed with OS3.0

v6
    - ClonePicture() now handles scaling.
    - minor changes and speed improvements.
    - JPEG is the first file format to be supported
      directly. LoadPicture() uses the tower.library
      JPEG codec if available. directly supported
      formats require less memory while loading.

v5
    - added method PICMTHD_TINTALPHA

v4.4
    - since v4.3, ObtainDrawHandle() crashed on screens with
      no sharable pens. fixed.
    - if render.library cannot be found in LIBS:,
      guigfx.library now tries to open it at libs/.
    - IsPicture() no longer crashes without datatypes.library.

v4.3
    - improved logic in ObtainDrawHandle() for
      truecolor-rastports and pensharemap=NULL
    - updated autodocs.
    - Calls to ScalePixelArray()/cybergraphics v41 have been
      removed. Instead, a 24bit render.library scaling-engine
      is used. ScalePixelArray() is too slow (especially with
      large images), does not scale correctly, causes
      flickering, and cannot be interrupted.
    - fixed PICMTHD_SET with pictures mapped to a drawhandle.
    - added tags GGFX_SourceWidth, GGFX_SourceHeight,
      GGFX_SourceX und GGFX_SourceY to ClonePicture(). It's
      now possible to clone a picture in part.
    - fixed a minor bug in MakePicture().
    - MakePicture() now accpets NULL as the palette argument
      for PIXFMT_CHUNKY_CLUT, in which case a grey palette
      with 256 entries will be generated.

v4.2
    - DrawPicture() did not set a correct return value under
      rare circumstances. fixed.
    - pictures now cache their last scaling-engine.
    - DrawPicture() is now guaranteed to execute the line hook
      at least once per call.

v4.1
    - the functions LockPicture() and UnlockPicture() are now
      considered 'obsolete'. Calling LockPicture() will always
      return FALSE, and UnlockPicture() will do nothing.

      Please remove these functions from your code and replace
      them with a call to DoPictureMethod() with
      PICMTHD_MAPDRAWHANDLE if you need optimized rendering.

      The idea behind LockPicture() wasn't too bad, but currently
      it is not possible to implement it properly. LockPicture()
      and UnlockPicture() will no longer be documented, but the
      LVOs remain valid and might be reactivated some day. Calling
      these functions in already existing code is harmless.

v4.00
    - implemented IsPicture()

v3.11
    - fixed several memory management problems with LoadPicture().

v3.10
    - fixed a heavy bug leading to memory corruptions, especially
      when drawing to native Amiga screen modes.

v3.03
    - MakePictureA() now accepts NULL as a data pointer. This
      will create a 'blank' picture with the specified
      attributes.
    - ObtainDrawHandleA() now accepts NULL for the pensharemap
      argument. In this case ObtainDrawHandle creates a drawhandle
      with a static 9bit colorspace palette.
    - MakePictureA() now accepts a NULL palette for PIXFMT_CHUNKY_CLUT.
      This will create a default-palette (256 colors from black to white)
    - drawing to bitplanes without scaling is now performed
      via Chunky2BitMap/BltBitMapRastPort.
    - implemented PICMTHD_SET.
    - fixed lots of bugs in internal picture conversion routines.

v3.02
    - guigfx.library no longer depends on datatypes.library v40.
      the minimum version number is reset to v39.
    - implemented PICMTHD_TEXTURE.
    - bumped revision number for render.library to v25.

v3.01
    - fixed a minor bug in LockPictureA().
    - added documentation for LockPictureA() and UnLockPicture().
    - added a workaround for INVALID_ID originating from
      PDTA_ModeID. INVALID_ID returned by a datatype appears
      neither logical nor legal to me. anyway, guigfx.library
      no longer crashes with HAM8 pictures loaded by the ILBM v43
      datatype in an ECS/OCS environment. however, the images still
      appear scrambled, since guigfx.library cannot determine whether
      to treat an image as HAM8 or not.

v3.00
    - Some more tags implemented.
    - the autodocs have been reworked.
    - the internal memhandler has been reset to RMHTYPE_POOL.
    - implemented LockPicture() and UnlockPicture().
    - color allocation strategy improved.
    - datatypes.Library is no longer required for guigfx.library
      to be opened successfully.

v2.01
    - fixed GGFX_SourceX / GGFX_SourceY when drawing truecolor data to
      truecolor rastports without scaling. Thanks to M. Hillenbrand
      who reported this obstinate bug.

v2.00
    - fixed some internal histogram-related quirks and problems.
      the resolution of a picture's histogram is now by default the
      pensharemap's resolution it is being added to. if no
      pensharemap is involved, then the histogram's resolution
      will be set to the default resolution (currently HSTYPE_12BIT_TURBO).
      You may as well set GGFX_HSType for LoadPicture(), MakePicture(),
      and ReadPicture(), but this is not required under normal
      circumstances. Better set the desired resolution when calling
      CreatePenShareMap().
    - guigfx.library no longer crashes with old versions of
      render.library. Now it closes down gently (It seems as I was
      completely brain-dead when I wrote the setup routine)
    - autodocs now reflect all new tags and methods.

v1.99
    - since the autodither value cannot be computed when rendering
      to HAM screen modes, HAM dithering is always enabled with
      autodither != 0 and disabled with autodither==0.
    - fixed documentation of AddPaletteA() and fixed a bug in
      AddPalette() / PALFMT_RGB32. Thanks to Frank Pagels who
      reported these problems.
    - added picture method PICMTHD_TINT.
    - guigfx.library no longer tries to open Cybergraphics.library
      v41. The code now correctly differentiates for ScalePixelArray()
      and custom scaling routines. Thanks to M. Hillenbrand and
      S. Sommerfeld who reported this bug.

v1.98
    - drawing/scaling truecolor to truecolor drawing is now
      done with ScalePixelArray/cybergraphics.library which
      isn't as slow as I expected. It can stand the test
      with a render.library scaling-engine plus line-by-line
      drawing, and it requires no additional memory.
    - The code now differenciates graphics v40 for drawing to
      graphic card rastports via WriteChunkyPixels().

v1.97
    - guigfx.library now tries to convert chunky pictures to
      truecolor before drawing to HAM modes. if conversion
      fails (i.e. with the picture in a static buffer), the
      image will be drawn with the 16/64 HAM base colors.

v1.96
    - fixed a minor bug that occured when drawing odd-width
      pictures in directdraw mode.
    - guigfx.library now renders to HAM modes. Currently the
      full HAM spectrum is only used with truecolor pictures.
      When ObtainDrawHandle() is supplied with GGFX_ModeID,
      then HAM is automatically recognized and used.

v1.95
    - removed a workaround for an incompatibility problem
      between the cybergraphx and picasso96 picture.datatypes.
      loading is faster now and requires less memory. this
      update requires the picasso96 picture.class datatype
      v43.26.
    - revised autodocs and completed the documentation for
      the picture method PICMTHD_CREATEALPHAMASK.

v1.94
    - fixed a overlap-memcopy bug in PICMTHD_CROP. You need to
      upgrade to render.library v22.1.

v1.93
    - improved alpha-channel handling. PICMTHD_MIXALPHA
      now handles alpha-channels in both the source and
      destination picture (if present).
    - implemented PICMTHD_CREATEALPHAMASK.
    - added E includes

v1.92
    - fixed bug in DoPictureMethod: certain internal format
      conversions lead to crashes since v1.7.
    - implemented PICMTHD_RENDER with destination format
      PIXFMT_RGB_24.
    - completed alpha-channel administration. an alpha-channel
      is no longer discarded when the internal pixel format
      changes.
    - implemented GGFX_AlphaPresent for MakePicture()

v1.9
    - rewrote all drawing routines. the code is more
      differentiated for optimized drawing.
    - autodither fixed. finally this feature works as
      it was originally intended to.
    - Fixed v1.8 bug when drawing to truecolor screens.
    - implemented GGFX_DitherMode for DrawPicture() and
      CreatePictureBitMap(). They may be used to optionally
      override the drawhandle's dithermode.
    - Note: guigfx.library v1.9 requires render.library v21.
    - implemented GGFX_AspectX and GGFX_AspectY to
      MakePicture().

v1.8
    - ObtainDrawHandle() no longer allocates pens for
      truecolor rastports. Thanks to Stefan Sommerfeld
      who reported this bug.
    - GGFX_SourceWidth and GGFX_SourceHeight were not
      correctly implemented for CreatePictureBitMap()
    - fixed minor memory transfer problems: TurboCopyMem()
      was sometimes applied to odd-sized memory areas
    - implemented GGFX_BufferSize for MakePicture()

v1.7
    - a picture has no longer to be maintained for an open
      colorhandle. with other words: you may DeletePicture()
      a picture after it has been added to a pensharemap via
      AddPicture().
    - implemented GGFX_MaxAllocPens for ObtainDrawHandle().
      This limits the number of allocated pens to a specific
      number. Better you use this feature only if you've got
      a very good reason for it.
    - math problems fixed. GGFX_Weight should work now. a better
      color allocation strategy has been implemented.
      Currently use GGFX_Weight in a range from 1-10. Maybe
      I will implement a more sophisticated measurement later.
    - internal color allocation order is now PALMODE_SATURATION
      instead of PALMODE_SIGNIFICANCE. this improves color
      allocation speed drastically.
    - drawhandles no longer maintain a global mapping-engine.
      this saves some memory and is remarkably faster in many
      situations, since the mapping-engine could not be linked
      to the drawhandle's histogram.

v1.6
    - implemented GGFX_ErrorCode for LoadPicture(). You specify
      a pointer to LONG, and a standard DOS error code will be
      returned (NULL when everything was OK).

v1.5
    - LoadPicture() did not always handle v43 bitmaps correctly.
      Fixed. Thanks to Markus Hillenbrand who reported this bug.
    - guigfx.library's global memhandler is reset to RMHTYPE_PUBLIC
      for debugging, since public memory violations can be
      tracked down more easily.
    - fixed PICMTHD_MIXALPHA with the source picture in
      PIXFMT_CHUNKY_CLUT
    - added PICATTR_AspectX and PICATTR_AspectY to GetPictureAttrs()

v1.4    - fixed minor autodither bug.
    - GGFX_CallBackHook implemented for CreatePictureBitMap.
    - the autodither calculation is now invoked only for rastports
      with a depth <= 8

v1.3
    - added GGFX_DitherMode to CreatePictureBitMap()
    - added GGFX_DestWidth, DestHeight, DestX and DestY to
      method PICMTHD_MIXALPHA and PICMTHD_SETALPHA.
      added GGFX_DestWidth, DestHeight, DestX, DestY, SourceX,
      SourceY, SourceWidth, SourceHeight to method PICMTHD_MIX.
      after all, DoPictureMethod() can apply clip regions of alpha
      channel data to regions inside the picture, with automatic
      scaling when necessary.
    - cleaned up all drawing routines.
    - GGFX_CallBackHook implemented for DrawPicture.

v1.2
    - fixed a bug in ClonePicture(). When a cloned picture was
      deleted after the original, a memhandler-failure occured
      (leading to an ILLEGAL exception in render.library)
    - fixed a bug in LoadPicture() - eliminated calls to IoErr().
      dos.library is not part of guigfx.library. this fixes
      crashes with unknown datatype objects or load errors.
    - guigfx.library now uses a global memhandler with RMHTYPE_POOL
      and MEMF_REVERSE.
    - implemented GGFX_SourceWidth, GGFX_SourceHeight, GGFX_SourceX
      and GGFX_SourceY for DrawPicture(). Now you can easily specify
      offsets.

v1.1
    - fixed a heavy bug when drawing to native Amiga screen modes.


v1.0
    - first internal beta release.