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Posts posted by vfbb

  1. 6 hours ago, hsauro said:

    All I actually want is to draw text that is orientated 90 degrees to the horizontally, ie vertical. No fancy paths to follow, just a straight line. I can currently do it by rotating the image first by 90 degress, writing the text horizontally, then rotate the image back -90 degrees.

    The correct way is to rotate only the drawing you are doing, in this case the text. For this you must rotate by ISkCanvas:


      System.Math, System.Math.Vectors, Skia;
    procedure TForm1.SkPaintBox1Draw(ASender: TObject; const ACanvas: ISkCanvas;
      const ADest: TRectF; const AOpacity: Single);
      LDest: TPointF;
      LDest := PointF(150, 50);
        ACanvas.DrawSimpleText('Skia4Delphi 1', LDest.X, LDest.Y, TSkFont.Create, TSkPaint.Create);
        LDest := LDest * TMatrix.CreateRotation(DegToRad(-90));
        ACanvas.DrawSimpleText('Skia4Delphi 2', LDest.X, LDest.Y, TSkFont.Create, TSkPaint.Create);




    Note: I made the adjustment of LDest with TMatrix.CreateRotation because when rotating the canvas, its X and Y of DrawSimpleText are also rotated.

  2. @hsauro  What exactly do you want to do? Draw text around a circle? Do you have any image of what it would be like? Drawing text along a path is not trivial, but depending on what it is, we can try to make a non-morphing example, just using letter rotation.

  3. Fix: I think he meant below Professional (Starter, Community and Trial).
    I looked at each Feature Matrix of the RAD Studio versions and questioned him, the compilation via command line feature varies a lot from version to version including from update to update. Some in the Starter edition only have the command line for Win32, others not even for Win32.



    • Like 1

  4. I believe that for general purposes, a great image format option would be WebP. It has the same performance as PNG but compresses 30% more in lossless mode. In lossy mode, it compresses 30% more than jpeg (with same quality) and still allows transparencies. It is a format that also allows animated images such as gif. It is supported by all browsers, many softwares, and even Windows 10 already displays thumbnails in folders.


    As for the future, I would bet on Heif. There are already many libraries that support it but most in beta mode, like skia.


    Compatibility is very important, I wouldn't bet on a format that image editors, viewers or browsers can't open.

    • Thanks 1

  5. Ok. In the previous folder also does not have any files? "Skia4Delphi\Library\Delphi10Sydney\Win32\Release\"

    If you don't have any files either, check your rsvars.bat, "C:\Program Files (x86)\Embarcadero\Studio\22.0\bin\rsvars.bat", if it contains the same content:


    @SET BDS=C:\Program Files (x86)\Embarcadero\Studio\21.0
    @SET BDSINCLUDE=C:\Program Files (x86)\Embarcadero\Studio\21.0\include
    @SET BDSCOMMONDIR=C:\Users\Public\Documents\Embarcadero\Studio\21.0
    @SET FrameworkDir=C:\Windows\Microsoft.NET\Framework\v4.0.30319
    @SET FrameworkVersion=v4.5
    @SET FrameworkSDKDir=
    @SET PATH=%FrameworkDir%;%FrameworkSDKDir%;C:\Program Files (x86)\Embarcadero\Studio\21.0\bin;C:\Program Files (x86)\Embarcadero\Studio\21.0\bin64;C:\Program Files (x86)\Embarcadero\Studio\21.0\cmake;C:\Users\Public\Documents\Embarcadero\InterBase\redist\InterBaseXE7\IDE_spoof;%PATH%
    @SET PlatformSDK=


  6. @TimCruise You will have to remove these two registries and reinstall skia4delphi. But to be sure, follow the steps:


    1) Uninstall via GetIt (if you haven't already)

    2) With your RAD Studio closed, delete these two skia records in "HKEY_CURRENT_USER\SOFTWARE\Embarcadero\BDS\21.0\Disabled Packages"

    3) Go to Windows Configurations > Applications > search for Skia4Delphi (if found, uninstall it with your RAD Studio closed).

    4) Check if the file "C:\Users\Public\Documents\Embarcadero\Studio\Skia4Delphi\unins000.exe" exists, if so, run it to uninstall.

    5) Install the Skia4Delphi running the "Skia4Delphi_2.0.1_Setup.exe", because some uses have reported problems using out GetIt package in Sydney. In setup's platforms screen, select just the platforms that your IDE is already to compile.

    6) After installation, try to run our sample "skia4delphi\Samples\Basic\FMX\Skia4Delphi_Basic.dproj"

  7. 8 hours ago, TimCruise said:

    Are you the author?

    Yes, my brother and I are the authors.


    8 hours ago, TimCruise said:


    Right. I suspect that some unsuccessful install is hampering new installs, but I need more information:

    1) Did you install only using installer (Skia4Delphi_2.0.1_Setup.exe) or did you try another method (GetIt or manual)?

    2) Was there an error during an installation? If so, do you still have the Build.Logs.txt that is generated in the folder you installed skia4delphi in?

    3) Access RegEdit.exe, and take a screenshot of "HKEY_CURRENT_USER\SOFTWARE\Embarcadero\BDS\21.0\Known Packages" and "HKEY_CURRENT_USER\SOFTWARE\Embarcadero\BDS\21.0\Disabled Packages".

  8. 22 minutes ago, TimCruise said:

    And now, I am still facing these 2 errors after I have installed Skia from within RAD Studio.  How do I correct them?  :classic_huh:



    Now that's a mistake. Probably the folder you are installing requires administrator permission and you have not run the installer as an administrator.


    The solution in this case is to uninstall and install in the default folder that the installer suggests (does not require admin permission).

  9. @TimCruise 


    There is but you need a macOS to install the SDK in your RAD Studio. It's even possible to run macOS on windows with VMWare, but that's probably illegal.

    Anyway, with the SDK installed you'll only be able to compile, the simulator doesn't work, you'll have to have an iPhone too.


    Without the SDK, you won't even be able to compile a blank project for the platform you want.


    About the Skia4Delphi installer, basically it checks if it is possible to compile for the platform, so if your delphi is really ready to compile for the platform, then yes it will appear available to be selected in its installation.

  10. Hello. I adapted your test with Skia4Delphi to directly access the pixels instead of painting the pixel. The result was 45 ms on win64.


    procedure TfrmMain.Button3Click(Sender: TObject);
      procedure DrawMandelbrotPixmap(APixmap: ISkPixmap; X, Y, au, bu: Double; X2, Y2: Integer);
        c1, c2, z1, z2, tmp: Double;
        i, j, Count, rgb: Integer;
        hue, saturation, value: Double;
        c2 := bu;
        for i := 10 to X2 - 1 do
          c1 := au;
          for j := 0 to Y2 - 1 do
            z1 := 0;
            z2 := 0;
            Count := 0;
            // count is deep of iteration of the mandelbrot set
            // if |z| >=2 then z is not a member of a mandelset
            while (((z1 * z1 + z2 * z2 < 4) and (Count <= 50))) do
              tmp := z1;
              z1 := z1 * z1 - z2 * z2 + c1;
              z2 := 2 * tmp * z2 + c2;
            // The color depends on the number of iterations
            hue := count / 50;
            saturation := 0.6;
            value := 0.5;
            PCardinal(APixmap.PixelAddr[i, j])^ := HSLtoRGB(hue, saturation, value);
            c1 := c1 + X;
          c2 := c2 + Y;
      au, ao: Double;
      dX, dY, bo, bu: Double;
      LWidth: Integer;
      LHeight: Integer;
      LTimer: TStopwatch;
      LBitmap: TBitmap;
      LSurface: ISkSurface;
      LTimer := TStopwatch.StartNew;
      LWidth := Image1.Width;
      LHeight := Image1.Height;
      LSurface := TSkSurface.MakeRaster(LWidth, LHeight);
      LBitmap := TBitmap.Create(LWidth, LHeight);
        ao := 1;
        au := -2;
        bo := 1.5;
        bu := -1.5;
        // direct scaling cause of speed
        dX := (ao - au) / (LWidth);
        dY := (bo - bu) / (LHeight);
        DrawMandelbrotPixmap(LSurface.PeekPixels, dX, dY, au, bu, LWidth, LHeight);
          procedure (const ACanvas: ISkCanvas)
            ACanvas.DrawImage(LSurface.MakeImageSnapshot, 0, 0);
      Showmessage(LTimer.Elapsed.TotalMilliseconds.ToString+' ms');


    However, your benchmark isn't accurate, you're basically changing pixel by pixel, it's not a good way to measure drawing library performance.


    Also, tasks that change an image pixel by pixel almost always perform better by creating a shader to run on the GPU. This is another advantage of Skia4Delphi, as it allows you to create shaders at runtime through the Skia Shader Language (based on GLSL). Even now I'm preparing a VCL sample of an animated shader, see the performance:




    • Like 4

  11. Eric, what version of your PAServer? Is it I couldn't confirm it, but someone reported in a whatsapp group that the PAServer patch 1 link on my.embarcadero.com is the link of the old version,


    So if that's your case, install the patch via getit and use the new PAServer which will be in the RADStudio directory.

  12. @Hans♫ I couldn't simulate your problem. I set up the same scenario you described in a blank project and the scroll worked perfectly. I also mounted on a TVertScrollBox and it worked perfectly. I'm using RAD Studio 11, but it works the same as in previous versions. Try simulating on a blank project to see where the problem is. I don't know what's going on, but maybe some other control is capturing the gesture...