Capesoft Draw Version History
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Version 2.67 (02 July 2008)

• Fixed: A GPF in the Draw icon loading where if the icon was loaded from a resource using WinEvent to get the handle, and the size was specified, and the icon contained only a 4 bit (16 colour) icon, and was completely transparent (had no coloured pixels). This resolves and issue in SendTo

 

 

Version 2.66 (03 June 2008)

• Changed: DrawHeader: The control is now populated with the width set to Full rather than a specific value.
• Fixed: DrawHeader: For a number of the prompts color:black was being ignored as if it was color:none
• Added: DrawHeader: The Local DrawHeader class override is blank by default, and unless it it filled in the global setting is used. If the global setting is blank then the default DrawHeader class is used. This allows the local setting to be overridden but still use a base class that is specified globally.

 

Version 2.65 (03 June 2008)

• Fixed: DrawHeader, the code was not being generated correctly if a variable was used for the Heading Text and Icon fields in the template.
• Fixed: DrawHeader, if the DrawHeader base class was overridden in the global settings then the custom based class setting would be ignored and the default class would be used.
• Added: Draw.Captcha() method, creates a "CAPTHCA" from a string, and optionally saves the PNG to disk with the file name specified. A CAPTCHA is a challenge-response mechanism that is intended to differentiate between a human and a computer. The current implementation is very simple, but will be expanded.
• Added: Draw.EnumProcessModules() method, which populates and array with the handles to all of the loaded modules for the current process.
• Added: DrawHeader can now use icons from any module, regardless of which DLL the icon is actually in.
• Fixed: DrawHeader template not populating the code for the x and y position of the text and icon.
• Changed: The EnumFont date types did not have the draw: namespace prepended.
• Changed: Merged two LOGFONT data declarations.
• Added: Module enumeration with the first instance of Draw that initialised. The handles to all loaded modules are retrieved and can then be used to loade resources from.
• Changed: External function and API prototypes have been moved to the DrawAPI.clw file.
• Added: SetDisplayArea() method that allows a specific region to be updated without the entire contents of each layer being composited together for a display [BETA].
• Added: ResetDisplayArea() method. Clears the SetDisplayArea setting and allows the entire image to be refreshed when calling Display()
• Fixed: Drawheader: Incorrectly named properties of the class in template generated code (iconPostionX, iconPositionY and barColor).
• Added: DrawHeader: Bar shading support to the template so that the bar drawn at the bottom of the header can be shaded between two colours.

 

 

Version 2.64 (23 May 2008)

• Fixed: Old Draw Window Headings not being displayed properly becuase the old procedure is no longer used (the global option to use the old draw header template should be enabled until migration to the new template is complete. See the DrawHeader documentation).
• Fixed: Function called as a Procedure warning on compile.
• Fixed: Template generating the call to Init() twice which could result in the GDI device contexts not being created when procedures with Draw objects where rapidly opened and closed.
• Added: Logging and error checking code to the GDI initialisation, as well as font rendering.
• Fixed: Copylayer() inverted source and destination calculations. This could result in the copied section y coordinate being inversed, or the copied blocks being inverted.
• Added: Entirely new DrawHeader template
• Added: All DrawHeader settabtings exposed on the global template
• Added: DrawHeader template ability to use a different base class
• Added: DrawHeader local template to allow the global settings to be overridden
• Added: DrawHeader backward compatibility, and an option to use the old template by ticking the box on the global extension.
• Added: Documented all properties and methods in the DrawPaint Class, see the DrawPaint documentation.
  • New Methods:
  • AddItem(), AlignBottom(), AlignLeft(), AlignRight(), AlignTop(), CalcStringDims(), Construct(), CopyItems(), DeleteItem(), Destruct(), DrawHighlightBox(), DrawHighlights(), DrawItems(), FindParent(), HideHighlight(), Init(), InResizeCorner(), ItemClicked(), Kill(), MakeSameHeight(), MakeSameSize(), MakeSameWidth(), MoveItems(), PasteItems(), RedrawHighlightBox(), Reset(), ResizeItem(), SaveHighlightPos(), SetCanvasSize(), SetCursor(), SetGrid(), SortItems(), SpreadHorizontally(), SpreadVertically(), TakeClickEvent(), TakeDragEvent(), TakeDropEvent(), TakeEvent(), TakeResizeEvent(), WithItem().
  • New Properties:
  • CanMoveNow, canvasColor, CopyItemQueue, gridColor, gridEnabled, gridStyle, gridWidth, hDrawFactor, HighLight, ItemQueue, LockParents, Moving, Resizing, vDrawFactor, ZoomFactor, _control, _DeltaX, _DeltaY, _highlighted, _HighlightItems, _HighlightQueue, _items, _MultiClickCount, _nextId, _StartMouseX, _StartMouseY.
• Added: Documented the new DrawHeader class
• Added: Drawheader backward compatibility, the template now allows either the new or the old DrawHeader to use, and the setting can be set globally and overrideen locally. Migrating to the new template should be transparent in most cases, except those where custom code has been added to the imported DrawHeading procedure. This code can now be moved to a custom DrawHeader class that inherits from the DrawHeader class, or the template can be used to modify the settings globally, with local overrides available. Both the old approach and new class based approach can be used in the same application by selecting the desired option for the particular control, and setting which should be the default on the global extension.
• Fixed: History documentation links were not working for entries that were created before the History was split into a seperate document
• Added: Documentation for the new DrawHeader class and templates, migration information, descriptions of the template settings.
  • New Methods:
    • Display, Init, Resize, Kill,
  • New Properties:
    • displayText, textX, textY, blurSize, autoShadow, shadowOffsetX, shadowOffsetY, shadowColor, iconName, bgColor, bgColorEnd, shadeType, shadeDirection, highlightPos, highlightIntensity, iconHandle, iconX, iconY, iconSize, barStartColor, barEndColor, barHeight.

 

Version 2.63 (23 April 2008)

• Added: New DrawHeader class. This class completely replaces the old Draw Header template/procedure:
  • The local procedure is no longer required, and does not need to be imported
  • Does not create and destroy a Draw object each time the control needs to be drawn
  • Full control over the object setting using the DrawHeader object
  • More properties exposed at the template level (global template settings coming soon)
  • Fast, intelligent built in resizing. Add the SV resizing extension and the control will handle all resizing. No hand coded needed.
  • Shade background support,
  • No icon control is needed or created, loading icons from disk and resource is handled internally and directly.
  • DrawHeader is based on Draw and hence everything supported in Draw is supported in DrawHeader - making it fully customisable.
  • Automatic icon size selection based on the control size
  • Full backward compatibility - existing controls continue to work and provide upgraded functionality
  • New shaded
  • Automatic positioning if the height of the control changes (support for vertical resizing)
  • Automatically uses the correct icon if the height of the control changes.
  • Text is centred in the control based on the font sized used and the height of the bottom bar (if any).
• Fixed: Multi-DLL compile error with new methods.
• Added: Lighten and Darken example code to the DrawImage example, as well as a demonstration of the two supported modes for Greyscale conversion.
• Added: Built in icon loading from resource - WinEvent is no longer needed for this functionality.
• Added: GetIconHandle method to load an icon using the Windows API, which supports loading from file or resource (this is done automatically, the correct source is located), as well as loading any size icon and resizing icons to the specified size if the specified size does not exist.

 

Version 2.62 (16 April 2008)

• Added some new fields to the ItemQueue in the DrawPaint class: Clipped, FitWidth and FitHeight.

Version 2.61 (13 February 2008)

• Added: Support for both FreeImage 3.10 and later and previous releases. In FreeImage prior to 3.10 the topdown parameter in FreeImage_ConvertFromRawBits and FreeImage_ConvertToRawBits was being handled in reverse, and in 3.10 this was fixed - however this resulted in all images loaded by the DrawImage functions being upside down when the DLL from 3.10 or newer was used. This has now been handled internally so that both old and new versions of the DLL are supported.
• Added: New DrawImage example that shows some of the basic DrawImage functionality. This will be expanded, along with the DrawImage support itself. Also a DrawPaint example will be available for future versions.
• Fixed: Unresolved Externals when compiling in Multi-DLL mode
• Major documentation cleanup and reorganisation. Documentation is now split into logical sections, and the documents have been moved to XHTML and all formatting is CSS based.

Version 2.60 (25 January 2008)

• Added: GreyScale() method to convert a section of the control, or any layer, to Grayscale (256 shades of gray). Supports both linear conversion and perceptual conversion (which used a good hueristic to preserve the preceptual brightness that the human eye would see).
• Fixed: Image() method loading 256 colour (8bit) bitmaps incorrectly, the wrong bytes were being assigned to the RGB components and the byte order was shifted by one resulting in a "corrupted" image where the colours were incorrect.
• New Documentation for the DrawPaint Class (work in progress, will be completely shortly)
• New Document for DrawImage class (coming soon)
• Improved integration for FreeImage
• Included FreeImage in the installer
• Complete revamp the documentation, added missing methods, split the documentation into multiple documents and improved navigation and usability. There is now a seperate Class Reference, as well as a seperate Layers reference, FAQ, History etc.
• Added: PointInPieSlice() method - returns whether a point (x,y coordinate) is within the specific Pie Slice shape (a segment of an Ellipse). Typically used after drawing a pie chart using the PieSlice() method to check whether a user clicked within one of the drawn slices, and if so which slice was clicked in.
• Added: Additional BestFit() method that takes Longs instead of Ulong. This polymorphic method is just a wrapper for BestFit() and included for convenience.

 

Version 2.59 (06 December 2007)

• Added: New features to the DrawPaint class for RightReports.

 

Version 2.58 (30 October 2007)

• Fixed: 256 color bitmaps had an error in the bitmap header that set the size to 1 bytes smaller than the actual file size, which could cause a very small number of applications to not open the produced BMP. The only applies to 256 color BMPs being written to disk by writing the BLOB for the image control directly to disk.

 

Version 2.57 (25 October 2007)

• Added: Option in the global template to disable resizing for the DrawHeading control template.
• Added: The docs and example for the Barcode support (PDF 417) now reflect the fact that the barcode function returns a value that should be checked.

 

Version 2.56 (25 October 2007)

• Fixed: GPF when starting threads very rapidly with Draw controls (applies primarily to DrawHeadings). All static variables are now threaded.

 

Version 2.55 (18 September 2007)

• Added: Support for resizing when using the DrawHeader template. Please note that this has changed the DrawMakeHeadings procedure prototype and if you are using this template you need to import the new procedure into your application using the template utility (or by importing the TXA file).
  Important: When upgrading to this version of Draw please ensure you update your DrawMakeHeadings procedure by running the template utility.

Version 2.53 (23 July 2007)

• Fixed: Template issue causing a compile error in Multi-DLL projects and projects not using DrawPaint or DrawImage.

Version 2.52 (16 July 2007)

• Added support for Clarion FreeImage (free)
• Integrated Clarion FreeImage functions
• New DrawPaint class for creating persistent objects, allowing the user to select and manipulate the objects (picking) etc. This is an entirely new class that provides a whole new set of functionality (Capesoft WriteReports is an example of the type of functionality that this can provide). Full documentation will be included in future releases of Draw, along with example applications.
• Fixed a bug when using FreeImage support in the root DLL and not enabling it in the application. This only applies to Multi-DLL projects that use the FreeImage support in some apps and not others that import from an app that has a different setting. This should not affect any current Draw users as it only applies to a pre-release version of Draw.

Version 2.41 (29 March 2007)

• Update the Multi-DLL support in the template
• New Multi-DLL example
• Add a section to the document of using Draw (and Progress) in multi-DLL applications.

Version 2.41 (29 March 2007)

• Update the Multi-DLL support in the template
• New Multi-DLL example
• Add a section to the document of using Draw (and Progress) in multi-DLL applications.

Version 2.40 (14 November 2006)

• New property Draw.mirrorText allows the text to be flipped back to the right direction when using RTL text rendering and the window order is set to Right-To-Left.
• Fixed new font rendering:
  • Coordinate system was off by 1 pixel
  • ErrorTrap was being called even though the SetTextAlign function was succeeding.
• New font rendering using the .wholeString property now supports 90 degree text (rotation by an arbitrary angle to be added in a future release).
• Fixed problems with the new StrHeight method when used with the WholeString font rendering.
• Automatic directional rendering of Hebrew and Arabic characters when used in conjunction with the Window or Control RTL ordering.
• Fixed a bug when using the Draw header template with the Legacy (Clarion) template chain and the Window Resize extension that produced compile errors
• Correct documentation regarding the 3D datatypes Point2D, Point3D, Vector3D. Data type names had not been updated in the documenation.
• New support for MultiDLL applications, simplified to work simply by ticking the checkbox on the global extension to support using Draw in a DLL.
• New MultiDLL support in the template to assist Draw and Progress use in Multi DLL application
• Changed MouseX and MouseY to handle controls with scrollbars where the Draw image is larger than the control. Returns theDraw. MouseX() and Draw.MouseY() in pixels relative to the origin (top, left hand corner) of the Draw image, regardless of where it is scrolled or not.

Version 2.30 (29 September 2006)

• Fixed the unhandled case of an equals sign in BufferFont, equals signs where drawing as minus signes (a single bar instead of two). This resolved an equals sign being incorrectly displayed by the .Show() method.
• Template tweaks to support AnyFont for the WindowHeading control template.
• New string support for Complex Script Languages such as Arabic and Japanese, new font rendering properties and options, Right To Left reading order.
• Automatic whole string rendering of Complex Script languages.
• Automatic setting of Right-To-Left reading order for Hebrew and Arabic.
• Support for additional character sets, see the new document for the .fontCharset property and the new Show() docs.
• Updated Font related entries in the docs - see Show() method for more information.
• Add .useUnicode, .renderWholeStrings, .textAlignRTL and .ansiToUnicode properties to the class (.useUnicode and .ansiToUnicode to be exposed in the next release).
• Added initial support for Unicode, ANSI to Unicode conversion (see above, to be exposed in the next release).
• Additional documentation updated, more improved consistency, more links etc.
• New .Curve method supports smooth curve drawing between a set of points and uses the Draw .curveSmoothness and Draw.curveTension properties to allow the drawing to the modifed. Uses Hermite curve interpolation.
• New ._ShowFull method
• New ._StringWidth and ._StringHeight methods
• Fixed a bug in the .WritePNG method that could result in the current layer being written to a PNG rather than the entire image.
• Fixed incorrect drawing of double shaded boxes when the intensity parameter was passed as zero.

Version 2.26 (10 July 2006)

• Changed the WriteBmp, WritePng, WriteLayerBmp and WriteLayerPng methods so that if the file exists it is deleted and a new file created for writing the image to.
• Fixed the Barcode method to handle barcodes where the number of columns in the barcode is a multiple of 8 (this was producing barcodes where each line "wrapped" onto the following and the barcode looked skewed to the side).
• Fixed drawing of Pie Slices where the chord of the arc that forms the outside of the slice had a width or height of zero (these were drawing as triangles rather than with curved arc edges).
• Uploaded missing images for the docs (HSV and RGB images).

Version 2.25 (24 November 2005)

• Fixes and improvements for all arc related methods (Arc, _ThickArc, Chord, Pieslice, ShadeArcBand, HalfEllipse etc.)
• Template changes for using Draw in multi DLL projects (Added "Export Draw Class from this DLL" option and "Use Draw that is exported in another DLL" option).
• Fixed StrLen method for vertical strings, fixed string first character positioning
• Fixed ShadeArcBand drawing one pixel out
• Fixed Pieslice drawing the "drop" section inverted for 3D pie slices.
• Documented PDF417 barcode functions and DLL.
• Grabscreen method now fully supports all options - it no longer grabs the entire screen, instead it now gets the specified section of the screen and places it at the passed coordinates.

Version 2.20 (17 November 2005)

• Added a Barcode method which draws PDF417 compatible barcode when passed a string containing the data for the barcode.
• Fixed drawing of shaded boxes a single pixel wide or high, where the pen width is set to greater than 1 (some types of boxes used the penwidth for drawing).
• Fixed StrLen method (was returning the incorrect pixel length for strings).
• Fixed font underlining (also now faster and uses no extra memory for underlined styles).
• Added support for loading icons from resources as well as disk for the LoadIcon method (Requires a handle to the icon resource, it is recommended that WinEvent be used to obtain the handle by calling the WinEvent function ds_GetHIcon()).
• Added support for all icon color formats for loading icons from resource.
• LoadIcon supports loading all icon formats from disk with the exception of 4 bit and 24 bit icons from disk (all icon formats for icon resource are supported. NOTE: Loading icons from resource requires a handle to the icon resource. Therefore WinEvent is recommended for loading icons from resources.).
• Fixed thick line clipping when the line ran along the edge of the drawing area.
• Improved thick line clipping to work on a per pixel basis.
• Fix problems on reports in Clarion 6.2, where setting prop:pixels and then restoring the value changes the value of prop:thous.
• Fixed very small pie slices.
• Added automatic bit depth detection for loading icons from resources.
• Corrected circles (Ellipse, _ThickEllipse, LinearEllipse, ShadeEllipse, HalfEllipse and Sphere) drawing 1 pixels left and up (many thanks to Brian Wigal for reporting this bug!).
• Corrected spelling and typographical errors in documentation.
• New HSV/RGB conversion methods - HsvToRgb, RgbToHsv, LightenColor, DarkenColor, Saturate and Desaturate.
• Add Min and Max methods -each take up to 10 parameters are return the minimum or maximum values thereof.

Version 2.15 (08 September 2005)

• Changed the HalfEllipse method to draw both half Ellipses and Circles (only circles were supported).
• Change the way the DrawStore.tmp file is created. This is a dummy file used by Draw. Each instance of Draw opens this file in Share mode, the file is never read or written to. The file is now created in the system temp directory, and the full path is used for the file name, this avoids problems when the system{prop:datapath} is set, and the file cannot be located when the file name is relative.
• Added an optional parameter to Polygon and ShadePolygon to allow a number of vertices to be specified, as well as the default of using all entries in the array for the vertices.
• Added support for shading to the HalfEllipse method, currently it supports linear shading, future versions will support other shading types.
• More updates to the docs, added more detail for methods such as Polygon and ShadePolygon, added new parameter lists and examples, as well as new style (parameters and example in tables), generally improved consistency, detail and layout.
• Fixed bug in the GetImagePixel method that returned the wrong color for the last row of pixels in the image.
• Added a PointInPolygon method that returns whether a coordinate passed is inside a defined polygon or not. This can be used to determine whether a user clicked in any area in the image control that can be defined by a polygon, or whether a user clicked on a particular polygon in the Draw control.
• Added SetFontMode to allow the font rendering mode to be set (anti-aliased, cleartype, non anti-aliased etc.).
• Added ImageFromBuffer - writes from a buffer that contains RGB data to a layer, allows the position of the image to be specified, along with the ability to clip the image and tile it both horizontally and vertically. Tiling in either direction can be specified independently.
• Added a BestFit method that returns the best proportional scaling when passed an existing width and height and the dimension that must be fit within.
• Added a ClarionToRGB method that converts a standard Clarion BGR color to an RGB color.
• Added a GetLastError function (not a member of the draw class, so it can be called anywhere in an app without a Draw object). This returns the last Windows API error code. This code can be passed to the Draw FormatMessage method, which produces a Clarion string containing the error message.
• Added a ToClipboard function that copies the Draw image to the clipboard. This function copies the visible contents of the control to the clipboard (so hidden layers etc. are ignored). The image is copied to the clipboard as a bitmap.
• When resizing and retaining the data, certain sizes could cause a GPF. This GPF was in the ResizeLayer method when copying the data from the old layer to the new layer, where the new layer was significantly smaller than the old one and the zero padding changed.
• Added support 256 color icons to the LoadIcon() method, fixed all issues with paletted icon transparency. The next release will add support for all other icon formats (1,2 and 4 bit paletted icons, as well as 16 and 24 bit icons). Currently both 8 bit (256 color) and 32 bit icons are supported. Windows XP style 32 bit support the full 8 bit alpha channel for transparency.

Version 2.14 (28 February 2005)

• Fixed GPF in the Blank() method when blanking the canvas to a color (rather than black or white) while the penWidth property of the class was greater than 1.

Version 2.13 (10 January 2005)

• Fixed template error in 2.12
• Added template option to allow Draw to be easily included in a DLL in multi DLL projects
• Added a DrawDLLMode define that the template automatically adds to the project defines (Clarion 5 needs to have this done manually). This allows the Draw to be compiled into a DLL and used from the DLL rather than compiling the Draw.clw file into every app in a multi DLL project. This define supports both Draw and Progress. See the What's New section for more information.
• Updated template to be consistent with new CapeSoft template style specification
• New AlphaCopy method improves performance, fixes alpha errors and a possible GPF.
• Added code to automatically create alpha channels when drawing text to a layer with an active alpha layer (still in testing)
• New DrawHeader template which uses a single layer instead of multiple layers and supports font anti aliasing
• Numerous updates to documentation
• Updated all example apps, totally revamped the main example app with numerous useful features, such as drop shadows and pie slices.
• Added HalfEllipse() method
• Fixed problems with Shaded object when a pen width and style had been specified.

Version 2.12 (05 January 2005)

• Internal release (not for public consumption).

Version 2.11 (04 January 2005)

• Added font anti-aliasing and rendering options (See SetFontMode).
• Added methods for enumerating all font on the system and populating a queue (See EnumFonts)
• Added a number of new internal Draw properties and equates for fonts.
• Fixed rendering issues with some fonts that truncated some letters.
• New examples, with numerous feature additions and more useful code (such as demonstrating drop shadows etc.).
• Added GetPixel method as an alternative name to GetImagePixel().
  

Version 2.10 (30 November 2004)

• Fixed clipping issues with boxes.
• Fixed a small memory leak where a Draw could exit without releasing GDI handles.
• Documented the numerous new methods that have been added, such as shaded ellipses and spheres
• Updated Draw header template to allow all settings to be modified on the properties page and to allow variables to be used as well as literal values
• New DrawHeader utility template for adding the DrawHeading procedure for both ABC and legacy.
• New Demo and Example applications, example application have been cleaned up and demonstrate the features
• DrawHeadings now allows icons in the current app to be specified, as well as icons in the application directory. See the Dynamic Header Template section for more information.
• New functions:
  • Blur
  • FileToString
  • GetDeviceCaps
  • Log
  • ShadeEllipse
  • ShadePolygon
  • Sphere
  • RadLine
  • StringToFile

Version 2.09 (21 April 2004)

• A number of internal fixes, an improved template and a large number of new features, which will be fully documented in the 2.10 update.
• New extension added to the template that allows Draw to dynamically create header with drop shadowed text on windows, simply drop the template on the window and enter text in the string (or even leave it blank which will use the window title). See the Dynamic Header Template section.

Version 2.08 (14 November 2003)

• Fixed GPF in Clarion 6 when writing to PNGs (threading bug).
  

Version 2.07 (04 November 2003)

• Interim release, fixes Duplicate label warnings with Clarion 6. Draw equates now have the 'Draw:' namespace identifier prepended to them.

Version 2.06 (20 August 2003)

• New Cylinder() method, and an additional cylinder method that allows new types of shading on cylinders.
• Fixed GPFs caused by accessing the 0th element of arrays.

Version 2.05 (31 July 2003)

• Only a single DrawStore.tmp file is created in the current Windows temp directory regardless of the number of programs using Draw that are run. (this file is always empty, and is never written to).
• Changed Windows Registry type equates to avoid duplicate label warnings with C6 EA 5.1.
• This release is the basic version required for CapeSoft Progress.

Version 2.04 (29 July 2003)

• Fonts: Fixed clipping, Font point sizes are now exact (previously they were an estimate that occasionally was somewhat inaccurate), Fixed font positioning, both vertical and horizontal. Note: You may notice that your fonts now display smaller than they were previously, the display size is now correct and uses the current screen resolution to calculate the exact pixel height of fonts.
• ColorRange() Method - returns a pair of colors on a range, given the start and end colors and the distance between them
• Added new example app (simpler and cleaner)
• Fixed shaded boxes that were 1 pixel too small when draw the same size as a layer.
• WriteBMP() and WritePNG() now correctly write the display buffer to disk rather than the current layer
• Added WriteLayerPNG() and WriteLayerBMP() to write just the current layer to disk.
• Fixed a bug in the WriteBMP() method that produced unreadable BMP's with large images by truncating the last byte.

Version 2.03

• Another massive update of the documentation, added examples and screen shots to all methods, added an info section with further useful information for each method, and links to related methods. Examples are now actual useful pieces of code that can simply be dropped in an app and compiled.
• Fixed penStyle applying to shaded objects.
• Fixed Highlight() method drawing off by a pixel (vertical).
• Image() method documentation updated and expanded
• Image() method supports tiling an image across a layer
• Polygons draw correctly when the current pen color is color:none
• The Polygon() Method has been modified, all the workarounds were removed and the original algorithm revised to work with all cases.
• Polygons are now faster as well as being consistent (no misdrawn pixels).
• Corrected misdrawn pixels at the end of very thin horizontal cylinders.
• ShadedLine() method shades a line between two colors in any direction (not just vertical or horizontal).
• Added ShadeEllipse() method
• Added ColorRange() method which determines start and end colors at two points within a color range
• Added versioning to the Draw template, templates which are dependant on Draw (such as Progress) now check for a sufficiently new version of Draw.
• Fixed problem with True Type fonts not displaying when ClearType was enabled under WindowsXP
• Changed layer display order, so that the first layer in the display order list is the bottom layer, which means that each new layer created is created on the top of the layer "stack".
• Fixed layers smaller than the the image control being draw from the bottom left hand corner rather than the top left hand corner.

Version 2.02

• Fixed a bug with with layer copying, which incorrectly positioned layers that were smaller than the baseLayer.

Version 2.01

• Added the call to UnLoadLib() for zlib in the Kill() method.
• Corrected an error in CopyLayer() that resulted in the last scanline being skipped.
• Corrected clipping for the HighLight() method (off by 1 pixel)
• Corrected small bug in the BufferFont() internal method. The bug did not affect any functionality.

Version 2.00 (Gold)

• Draw has gone gold!
• Added Layers, layer transparency, layer alpha channels, Hidden layers and layer drawing methods. See the section on Layers for more information.
• Added the GetWindowsColors() method to retrieve the current colors for the Windows interface.
• Added a layer data type and a layer array to store layers.
• Major revamp of the documentation, neatened and cleaned up existing sections, added a large number of new sections and clarified some of the more obscure sections.
• Added a layerOrder array to store the layer order independently of the layer storage order.
• Added the following methods for manipulating layers:
  
  

  Draw.AddAlpha	Add an alpha channel to a layer
  Draw.AlphaCopy	Copy a block of pixels from one layer to another using alpha transparency.
  Draw.CopyLayer	Copy a block of pixels from one layer to another.
  Draw.HideLayer	Set a layer to hidden.
  Draw.IndexTransparency	Set the index transparency of the layer.
  Draw.InitLayer	Initialise a new layer
  Draw.MoveLayer	Change a layer's display order.
  Draw.ResizeLayer	Resize a specific layer.
  Draw.SetMode	Set the display mode.
  Draw.Showlayer	Set a layer to be shown when Display() is called.
  Draw.SwapLayers	Swap two slayer's display order.
  Draw.ToAlpha	Copy one RGB channel from one layer to another.
  Draw.WithLayer	Activate a layer for drawing to.

  
  
• A number of bug fixes and large number of improvements have gone into this release.
• Cleanup up and corrected the template and template documentation.
• Added new examples, cleaned up old examples.
• Modified Init() and Kill() to allow the object to be dynamically created and Init() and Kill() called multiple times to re-initialise the object.
• Added a destructor to the class.
• Added a large number of tweaks and improvements, including insuring that old Draw programs continue to work flawlessly even though they now use layers.
• All example apps have been redone and a number of new examples added - see the examples section.
• Both libpng.dll and zlib.dll are correctly loaded at runtime, if the files are missing Draw handles the error.

Version 1.0 Beta 11a

• Added LoadIcon method to allow Windows icons (.ICO files) to be loaded (currently only supports WindowsXP 32 icons)
• Changed the Show method, if the font color was less than zero, the text would simply not be drawn, now the font color is set to black if it is less than zero.
• Added a HighLight method that allows a color to be XOR'd to turn a highlight effect on and off over an area.

Version 1.0 Beta 11

• Added Methods for 3D calculations (All method can be used for 2D calculations):
  • Cross Product
  • Dot Product
  • Scalar and vector multiplications
  • Scalar and vector additions
  • Perpendicular calculation
  • Distance from a line to a point
  • Equality checking between any two vectors or points
  • Scalar and vector subtraction
  • Check whether a point is on a line in 3D space
  • Intersection between two lines in 3D space(whether they intersect and where)
• PNGs produced by Draw are now compatible with all compliant PNG decoders.
• Draw now loads any DLLs at runtime (relevant for writing PNGs).
• Major revamp of documentation.
• The Image() method now supports a transparency color for BMP's.
• New data types for 3D calculations:
  • vector
  • point
  • line3D

Version 1.0 Beta 10

• A huge number of fixes and improvements since the last public release (Beta 7) too many to list individually.
• Fixed all polygon drawing issues, the polygon method is now robust and a little faster too.
• A whole pile of changes to the font handling, mostly bug fixes but some optimisation issues too.
• Added Draw.fontZoom property to allow the fonts to be globally resized for high resolution reports and such.
• The Arc() method has been tweaked and improved, and a few rounding issues tidied up.
• 256 colour drawing has been implemented. This should be particularly useful if the image needs to be sent across a network, or if the 24 bit version is bloating a report excessively. See the Init256() method for details on using 256 colour Draw images.
• Resizing supports 256 colour bitmaps, and zero padding is now correctly calculated.
• Lots of code cleanup work has been done, so Draw should be cleaner and more consistent internally.
• Added a SwapBuffers() method that allows any bitmap buffer to be written to the image control.

Version 1.0 Beta 7

• Added global extension to allow PNG support to be disabled - with no PNG support it is not necessary to ship the zlib.dll file.
• Documented all the features of the Blank() method.
• Added patterned fills and the Draw Pattern Maker - pattern.exe, which allows you to create your own patterned fills with a graphical interface.
• Added the SetFill() method to allow patterned fills to be used.
• Fixed rounding error with MouseY() method.
• The Image() method did not support all the documented features. This has now been corrected.
• The Image() method now uses the top left hand corner as the origin, the same as all the other Draw methods
• Fixed incorrect drawing of 45 degree lines that were more than 1 pixel thick
• Alphabetised class methods in documentation and added new table for easier access.
• Fixed SetFontColor() method that was swapping R and G color components (Clarion colors treated as RGB instead of BGR)
• Numerous fixes to the Arc() method, particularly with thick arcs.
• Fixed vertical font clipping.
• Character font clipping implemented. Clips at the character level, so a character drawing off the edge of the control will only draw the section within the control and won't wrap. Previously the character was either clipped or not.
• SetPenStyle() handles incorrect style options by setting the style to the default.
• Blurry fonts when black font was drawn on white background fixed.
• Fixed vertical text not printing is the font color was < 0
• Added a fontStyle property to the class, see the Show() method for more details.
• Text had a slight vertical alignment error, this has been corrected.

Version 1.0 Beta 6

• Beta 5 was an incremental release and the documentation was not changed.
• Fixed issues with 45 degree lines (pixel popping).
• Optimised 45 Degree lines.
• Fixed boundary and clipping issues.
• Fixed an error in the line algorithm that sometimes drew lines 1 pixel too short.
• Fixed the Blank method, when clearing to colors other than black or white it would not clear the bottom row of pixels.
• Fixed Polygon drawing and filling.
• Horizontal Doubled shaded cylinders erroneously treated Clarion colors as RGB instead of BGR.
• Fixed the Show method, text now draws in the correct position.
• Fixed the StrLen method, which returned the number of bytes taken up by the individual color components rather than the pixel length of the string.
• Changed the WriteBMP method so that it is not necessary to have called Display at least once before writing to a BMP file.

Version 1.0 beta 4

• Changed the coordinate system to be more consistent across all draw methods, (1,1) is the top left corner (width,height) is the bottom right.
• Full thick line support for chords and arcs.
• Dramatically improved clipping.
• Full support for thick lines with pen styles (Clarion does not support this).
• Added Resize() method to allow the image buffer to be resized dynamically.
• Added StrLen() method to return the number of pixels any string will take up.
• Added GetDisplay() method to allow the data in the control to be copied back to the Draw buffer.
• Added GetDevicePixel() method to get the color of any pixel on the screen.
• Added GetImagePixel() method to get the color of any pixel in the Draw control.
• Added ShadeLine() method which allows horizontal and vertical lines to be shaded from one color to another.
• Added SetPenWidth() method to allow the penwidth member data to be set.
• Changed Image() method to allow the Draw buffer to be resized dynamically.
• Added ResizeControl() method to allow the control to be resized dynamically.

Version 1.0 beta 3

• Faster Double Shaded Cylinders
• Fixed GPF with MetallicShadedCylinder() after repeated calls.
  

Version 1.0 beta 2

• Full Support for thick lines
• Full support for pen styles (added SetPenstyle() method)
• Supports thick lined circles and ellipses (Clarion doesn't)
• Does not support filled chords
• Fixed bug which drew vertical lines in the incorrect colour
• Fixed GPF (General Protection Fault) on close with ABC
• Blank() method now clears to any colour
• GrabScreen() Method added to get a screen capture
• Resolved numerous small bugs and increased some methods speed
• All shaded cylinders and boxes now draw correctly in all directions
• Corrected cylinder lengths (cylinders would draw slightly too long)
• Updated demo apps for ABC and legacy.