Alexander Sviridenkov

1 minute ago, Rollo62 said:

@Alexander Sviridenkov That looks great, as always.

I'm not sure if the performance and large-file features were limited to VCL and desktop mostly, or if also mobile apps will improve a lot, with or without SKIA ?

Thank you.

Processing of documents with many SVG images is improved for all platforms and doesn't depend on canvas. But fast rendering of single large SVG image is for VCL OpenGL canvas only.

Bitmaps usually have premultiplied alpha - RGB values should be multiplied to alpha (0-1) value.

You can create explicit IOHandler, set it as IOHandler for client component and set MaxLineLength property for IOHandler instance.

HTML Office Library can display PDF, Word, Excel, Powerpoint, EPUB and other formats from any source and on any platform.

delphihtmlcomponents.com - create complex UI in Delphi using HTML/CSS. All native, no external dependencies.

IMHO such tasks should not depend on graphic library and should not require low-level graphics knowlege. What you need is object manipulation library, like vector diagram editor.

Here is simple implementation using HTML Component Library (compiled and project source). 20 minutes, 50 lines of code. You can drag images from lbrary at right side, select it, resize, rotate, delete (Del key):

https://delphihtmlcomponents.com/ImageMove.zip

It can use Direct2d or GDI+ or FMX canvas on any platform - doesn't matter.

A tool to simplify source code search. 

Find where class or function is declared, where class descendants are declared, search only in comments or in strings, etc.

Build for Delphi and written in Delphi from scratch.

Detailed description: https://delphihtmlcomponents.com/codefinder.html

By default TObjectList owns contained objects. So create it with False parameter in constructor or use Extract to remove object from list.

It is better to use HTML parser for this.

Use any FMX reporting library that works on Android.

17 minutes ago, John Kouraklis said:

Ah, thanks Alex. I will check.

 

Do you also have a converter from HTML to MD? 

No, it general case this is not possible, only for very limited set of tags,.

Your HCL version has MD to HTML converter in htmarkdown unit, please use

MD := TMDParser.Create(..);

s := MD.Render;

There is also THtMardown panel which displays MD placed to HTML property.

IDE from version 11.2 uses this component for MD files and code hints.

Please use coupon code CS2022 (valid until end of the week).

https://delphihtmlcomponents.com/order.html

Code is not simple, you shoud implement IDWriteFontCollectionLoader, IDWriteFontFileEnumerator, IDWriteFontFileStream, IDWriteFontFileLoader interfaces and use Factory.CreateCustomFontCollection.

DirectWrite has own methods for loading custom fonts from memory.

9 hours ago, ErikP said:

Hi, is the a developer license for HTML Office Lib ?

I only see site licence.

 

Thank you

 

Sorry, currently only Site license is available.

https://delphihtmlcomponents.com/office.html

Please use coupon code BFO2022

HTML Office Library is a cross platform and 100% native solution for reading and displaying MS Office files (RTF, XLS, XLSX, XLSB, DOC. DOCX, PPT, PPTX), PDF, EPUB, MD, FB2, WMF, EMF, PICT, MSG, EML, OutLook (PST and OST) and The Bat mailboxes. For Word formats (DOC, DOCX, RTF) it supports both paged and web layout.

Converted document can be displayed in VCL or FMX application (using included part of HTML Component Library) or browser. Conversion is threadsafe and do not use system API so can be used in Web serverrs. Embedded WMF/EMF/PICT vector images are converted to SVG.

Library also contains full text search engine (also 100% written in Delphi) which is faster and requires less memory than other well-know solutions.

Test on 8000 EPUB documents, 3.5 Gb.

Application     Indexing Time     Index Size     Mem used

DocFetcher     3 min                  476Mb          600Mb

dtSearch         8 min                  727Mb         1000Mb

X1 Search        59 min               1260 Mb      600Mb

Copernic         13 min               1150 Mb      500Mb

Office Demo   1m 30s               145 Mb       300 Mb

There are two compiled demos available:

1. Simple document viewer: allows to view any document on hard drive using file tree on left side and HtPanel on right.
   https://delphihtmlcomponents.com/FileBrowser.zip
2. Search Engine demo: create full text search index for documents located in selected folders and find any document from application or Web.
   https://delphihtmlcomponents.com/SearchEngine.zip
   No installation required. How to use: Run application (SearchEngine.exe). Click Add folder and select folder containing office documents or Outlook PST/OST databases. Click Start indexing, wait until it is completed. Search for documents using one of the following: a) Go to Search tab and enter search query (any words). b) Click Web interface icon and enter search query.

TZipFile has RegisterCompressionHandler method so you can register custom compression class that will call libdeflate for compression. Delphi headers for Libdeflate can be found on this forum.

You can register own ZCompression stream implementation based on libdeflate, it will be much faster than default implementation.

You can add it in OnCommang* event handler

  AResponseInfo.CustomHeaders.Add('Access-Control-Allow-Origin: *');
  AResponseInfo.CustomHeaders.Add('Access-Control-Allow-Methods: GET, POST, PUT, DELETE');
  AResponseInfo.CustomHeaders.Add('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');

round(pos/2.55)

This may be related to incorrect font information returned by WinAPI for new fonts in W10/11. AFIR latest HCL versions contains workaround for this.

Whole rendering in one control is performed using single canvas class. You can set canvas class separately for each control but they cannot be mixed.

Default is THtCanvasGP (GDI+).

Current version works fine on Windows10/11, so I don't know what may cause this issue in 3.7.

Have you tried different fonts (Arial, Tahoma, etc)?

Is it present when using all canvas classes (THtCanvasGDI, THtCanvasDX, THtCanvasGP)?

Also does simple test project (form and HtPanel created at design time) has the same issue?