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Showing content with the highest reputation since 05/20/22 in Posts

1. ## Rounded polygon

Here's an example: uses Skia; function MakeCubicSplineInterpolation(const APoints: TArray<TPointF>): ISkPath; var LPathBuilder: ISkPathBuilder; LSegments: Integer; I: Integer; mx: Single; my: Single; LScratches: array of record a, b, c, r, p: TPointF; end; begin LPathBuilder := TSkPathBuilder.Create; if Length(APoints) < 2 then Exit(LPathBuilder.Detach); if Length(APoints) = 2 then begin LPathBuilder.MoveTo(APoints[0]); LPathBuilder.LineTo(APoints[1]); Exit(LPathBuilder.Detach); end; LSegments := Length(APoints) - 1; SetLength(LScratches, LSegments); LScratches[0].a := PointF(0, 0); LScratches[0].b := PointF(2, 2); LScratches[0].c := PointF(1, 1); LScratches[0].r := PointF(APoints[0].X + 2 * APoints[1].X, APoints[0].Y + 2 * APoints[1].Y); for I := 1 to LSegments - 2 do begin LScratches[I].a := PointF(1, 1); LScratches[I].b := PointF(4, 4); LScratches[I].c := PointF(1, 1); LScratches[I].r := PointF(4 * APoints[i].X + 2 * APoints[I + 1].X, 4 * APoints[I].Y + 2 * APoints[I + 1].Y); end; LScratches[LSegments - 1].a := PointF(2, 2); LScratches[LSegments - 1].b := PointF(7, 7); LScratches[LSegments - 1].c := PointF(0, 0); LScratches[LSegments - 1].r := PointF(8 * APoints[LSegments - 1].X + APoints[LSegments].X, 8 * APoints[LSegments - 1].Y + APoints[LSegments].Y); for I := 1 to LSegments - 1 do begin mx := LScratches[I].a.X / LScratches[I - 1].b.X; my := LScratches[I].a.Y / LScratches[I - 1].b.Y; LScratches[I].b := LScratches[I].b - PointF(mx * LScratches[I - 1].c.X, my * LScratches[I - 1].c.Y); LScratches[I].r := LScratches[I].r - PointF(mx * LScratches[I - 1].r.X, my * LScratches[I - 1].r.Y); end; LScratches[LSegments - 1].p := PointF(LScratches[LSegments - 1].r.X / LScratches[LSegments - 1].b.X, LScratches[LSegments - 1].r.Y / LScratches[LSegments - 1].b.Y); for I := Length(APoints) - 3 downto 0 do begin LScratches[I].p := PointF((LScratches[I].r.X - LScratches[I].c.X * LScratches[I + 1].p.X) / LScratches[I].b.X, (LScratches[I].r.Y - LScratches[I].c.Y * LScratches[I + 1].p.Y) / LScratches[I].b.Y); end; LPathBuilder.MoveTo(APoints[0]); for I := 0 to LSegments - 2 do begin LPathBuilder.CubicTo(LScratches[I].p, PointF(2 * APoints[I + 1].X - LScratches[I + 1].p.X, 2 * APoints[I + 1].Y - LScratches[I + 1].p.Y), APoints[I + 1]); end; LPathBuilder.CubicTo(LScratches[LSegments - 1].p, PointF(0.5 * (APoints[LSegments].X + LScratches[LSegments - 1].p.X), 0.5 * (APoints[LSegments].Y + LScratches[LSegments - 1].p.Y)), APoints[LSegments]); Result := LPathBuilder.Detach; end; procedure TForm1.SkPaintBox1Draw(ASender: TObject; const ACanvas: ISkCanvas; const ADest: TRectF; const AOpacity: Single); var LPaint: ISkPaint; LMyPoints: TArray<TPointF>; begin LMyPoints := [PointF(62, 511), PointF(162, 605), PointF(262, 610), PointF(362, 402), PointF(462, 959), PointF(562, 58), PointF(662, 272), PointF(762, 99), PointF(862, 759), PointF(962, 945)]; LPaint := TSkPaint.Create(TSkPaintStyle.Stroke); LPaint.Color := TAlphaColors.Red; LPaint.AntiAlias := True; LPaint.StrokeWidth := 3; LPaint.StrokeCap := TSkStrokeCap.Round; ACanvas.DrawPath(MakeCubicSplineInterpolation(LMyPoints), LPaint); LPaint.StrokeWidth := 10; LPaint.Color := TAlphaColors.Black; ACanvas.DrawPoints(TSkDrawPointsMode.Points, LMyPoints, LPaint); end; Result: Note: You don't need to use Skia, it was just a facilitator for the example.
2. ## Request for advice: FireMonkey and Frames

That's why I did not use frames at all... But with FMX there is no need for a "frame". For every content I create a Form with a TLayout. If there is any need to uses this content on a other form/tab/whatever, you just have to set the parent of the layout to the e.g. tab or any other layout on any other form. So easy... Frank
3. ## Rounded polygon

Here's my GetSmoothPath() routine. It requires no specific graphics library to use, just a few extra functions (also included below). This function generates an array of control points that's very easily converted into a flattened cubic bezier path using just about any 2D graphics library. (nb: The code below has been written with simplicity as the focus rather than performance.) uses SysUtils, Math; type TPointD = record X, Y: double; end; TPathD = array of TPointD; TArrayOfDouble = array of double; function DistanceSqrd(const pt1, pt2: TPointD): double; begin result := Sqr(pt1.X - pt2.X) + Sqr(pt1.Y - pt2.Y); end; function Distance(const pt1, pt2: TPointD): double; begin Result := Sqrt(DistanceSqrd(pt1, pt2)); end; function OffsetPoint(const pt: TPointD; dx, dy: double): TPointD; begin result.x := pt.x + dx; result.y := pt.y + dy; end; function GetAvgUnitVector(const vec1, vec2: TPointD): TPointD; var inverseHypot: Double; begin Result.X := (vec1.X + vec2.X) * 0.5; Result.y := (vec1.Y + vec2.Y) * 0.5; inverseHypot := 1 / Hypot(Result.X, Result.Y); Result.X := Result.X * inverseHypot; Result.Y := Result.Y * inverseHypot; end; procedure MakeSymmetric(var val1, val2: double); begin val1 := (val1 + val2) * 0.5; val2 := val1; end; function GetUnitVector(const pt1, pt2: TPointD): TPointD; var dx, dy, inverseHypot: Double; begin if (pt1.x = pt2.x) and (pt1.y = pt2.y) then begin Result.X := 0; Result.Y := 0; Exit; end; dx := (pt2.X - pt1.X); dy := (pt2.Y - pt1.Y); inverseHypot := 1 / Hypot(dx, dy); dx := dx * inverseHypot; dy := dy * inverseHypot; Result.X := dx; Result.Y := dy; end; // GetSmoothPath - returns cubic bezier control points // parameters: 1. path for smoothing // 2. whether or not the smoothed path will closed // 3. percent smoothness (0..100) // 4. maximum dist control pts from path pts (0 = no limit) // 5. symmetric vs asymmmetric control pts function GetSmoothPath(const path: TPathD; pathIsClosed: Boolean; percentOffset, maxCtrlOffset: double; symmetric: Boolean): TPathD; var i, len, prev: integer; vec: TPointD; pl: TArrayOfDouble; unitVecs: TPathD; d, d1,d2: double; begin Result := nil; len := Length(path); if len < 3 then Exit; d := Max(0, Min(100, percentOffset))/200; if maxCtrlOffset <= 0 then maxCtrlOffset := MaxDouble; SetLength(Result, len *3 +1); prev := len-1; SetLength(pl, len); SetLength(unitVecs, len); for i := 0 to len -1 do begin pl[i] := Distance(path[prev], path[i]); unitVecs[i] := GetUnitVector(path[prev], path[i]); prev := i; end; Result[len*3] := path[0]; for i := 0 to len -1 do begin if i = len -1 then begin vec := GetAvgUnitVector(unitVecs[i], unitVecs[0]); d2 := pl[0]*d; end else begin vec := GetAvgUnitVector(unitVecs[i], unitVecs[i+1]); d2 := pl[i+1]*d; end; d1 := pl[i]*d; if symmetric then MakeSymmetric(d1, d2); if i = 0 then Result[len*3-1] := OffsetPoint(path[i], -vec.X * Min(maxCtrlOffset, d1), -vec.Y * Min(maxCtrlOffset, d1)) else Result[i*3-1] := OffsetPoint(path[i], -vec.X * Min(maxCtrlOffset, d1), -vec.Y * Min(maxCtrlOffset, d1)); Result[i*3] := path[i]; Result[i*3+1] := OffsetPoint(path[i], vec.X * Min(maxCtrlOffset, d2), vec.Y * Min(maxCtrlOffset, d2)); end; if not pathIsClosed then begin Result[1] := Result[0]; dec(len); Result[len*3-1] := Result[len*3]; SetLength(Result, Len*3 +1); end; end; And here's what it produces ... the path to smooth (black), the cubic bezier control path produced by GetSmoothPath() (blue) and the flattened cubic bezier path (2D graphics library of you choice required) (red). var TPathD path; begin path := MakePath([190,120, 260,270, 560,120, 190,490]); path := GetSmoothPath(path, true, 20, 0, false); path := ThirdParty2DGraphicsLibrary.FlattenCBezier(path); end; var TPathD path; begin path := MakePath([190,120, 260,270, 560,120, 190,490]); path := GetSmoothPath(path, true, 80, 0, false); path := ThirdParty2DGraphicsLibrary.FlattenCBezier(path); end; Edit: The best way to avoid intersections is to make sure you have enough data points before generating your curves.
4. ## Rounded polygon

I just remembered that Graphics32 has two examples which demonstrates interpolation: https://github.com/graphics32/graphics32/tree/master/Examples/Drawing/CubicSpline https://github.com/graphics32/graphics32/tree/master/Examples/Drawing/Curves Both of these just uses Graphics32 for output. The curve generation is independent. Built into Graphics32 there's also the TCanvas32.CurveTo method which does cubic Bézier interpolation (4 control points) and the TCanvas32.ConicTo method which does quadratic Bézier interpolation (3 control points).
5. ## Android: Opening files in external application

Hi kindly check https://github.com/emozgun/delphi-android-SAF
6. ## Making Delphi 2007 HighDPI-aware

As suggested I grabbed these posts and created a new topic.
7. ## Using lame_enc.dll to encode to MP3

I spent some time to have Delphi interface correctly with the Lame-encoder-DLL, so I thought it a good idea to share the result, since I also could not find any good Delphi-code for this on the net. The Lame-source comes with a rudimentary Delphi-header-file, but this has several issues, which I have tried to fix: The file references unnecessary stuff, preventing compilation, easy to fix. The encoding starts at the beginning of the wave-file, thereby encoding the header. This gives a noise at the beginning and can switch the stereo-channels. Fix: Offset the source into the data-section of the wave-file. Since this offset can vary, I have used the utility functions by Kambiz R. Khojasteh (http://www.delphiarea.com) to retrieve the necessary info using WinApi.MMSystem. Lame suggests writing a VBR-Header to the file, even though it's CBR, I have changed the routine accordingly. This way devices can e.g. figure out the duration of the mp3-audio more easily. Instead of file-handles I'm using TFileStream, that seems to speed up encoding considerably. Usage: EncodeWavToMP3(WaveFile, MP3File, Bitrate) WaveFile needs to be 16-bit Stereo, but that could be adjusted. Bitrate is a constant bitrate, for example 128. Support for VBR could be added. If you use it and find something wrong, I'd like to know 🙂 Here is the unit: unit MP3ExportLame; interface Uses System.SysUtils, WinApi.Windows, System.Classes; type // type definitions PHBE_STREAM = ^THBE_STREAM; THBE_STREAM = LongWord; BE_ERR = LongWord; const // encoding formats BE_CONFIG_MP3 = 0; BE_CONFIG_LAME = 256; // error codes BE_ERR_SUCCESSFUL: LongWord = 0; BE_ERR_INVALID_FORMAT: LongWord = 1; BE_ERR_INVALID_FORMAT_PARAMETERS: LongWord = 2; BE_ERR_NO_MORE_HANDLES: LongWord = 3; BE_ERR_INVALID_HANDLE: LongWord = 4; // format specific variables BE_MP3_MODE_STEREO = 0; BE_MP3_MODE_DUALCHANNEL = 2; BE_MP3_MODE_MONO = 3; // other constants BE_MAX_HOMEPAGE = 256; type TMP3 = packed record dwSampleRate: LongWord; byMode: Byte; wBitRate: Word; bPrivate: LongWord; bCRC: LongWord; bCopyright: LongWord; bOriginal: LongWord; end; TLHV1 = packed record // STRUCTURE INFORMATION dwStructVersion: DWORD; dwStructSize: DWORD; // BASIC ENCODER SETTINGS dwSampleRate: DWORD; // ALLOWED SAMPLERATE VALUES DEPENDS ON dwMPEGVersion dwReSampleRate: DWORD; // DOWNSAMPLERATE, 0=ENCODER DECIDES nMode: Integer; // BE_MP3_MODE_STEREO, BE_MP3_MODE_DUALCHANNEL, BE_MP3_MODE_MONO dwBitrate: DWORD; // CBR bitrate, VBR min bitrate dwMaxBitrate: DWORD; // CBR ignored, VBR Max bitrate nQuality: Integer; // Quality setting (NORMAL,HIGH,LOW,VOICE) dwMpegVersion: DWORD; // MPEG-1 OR MPEG-2 dwPsyModel: DWORD; // FUTURE USE, SET TO 0 dwEmphasis: DWORD; // FUTURE USE, SET TO 0 // BIT STREAM SETTINGS bPrivate: LONGBOOL; // Set Private Bit (TRUE/FALSE) bCRC: LONGBOOL; // Insert CRC (TRUE/FALSE) bCopyright: LONGBOOL; // Set Copyright Bit (TRUE/FALSE) bOriginal: LONGBOOL; // Set Original Bit (TRUE/FALSE_ // VBR STUFF bWriteVBRHeader: LONGBOOL; // WRITE XING VBR HEADER (TRUE/FALSE) bEnableVBR: LONGBOOL; // USE VBR ENCODING (TRUE/FALSE) nVBRQuality: Integer; // VBR QUALITY 0..9 btReserved: array [0 .. 255] of Byte; // FUTURE USE, SET TO 0 end; TAAC = packed record dwSampleRate: LongWord; byMode: Byte; wBitRate: Word; byEncodingMethod: Byte; end; TFormat = packed record case Byte of 1: (mp3: TMP3); 2: (lhv1: TLHV1); 3: (aac: TAAC); end; TBE_Config = packed record dwConfig: LongWord; format: TFormat; end; PBE_Config = ^TBE_Config; TBE_Version = record byDLLMajorVersion: Byte; byDLLMinorVersion: Byte; byMajorVersion: Byte; byMinorVersion: Byte; byDay: Byte; byMonth: Byte; wYear: Word; zHomePage: Array [0 .. BE_MAX_HOMEPAGE + 1] of Char; end; PBE_Version = ^TBE_Version; //Headers for Lame_enc.dll (ver. 3.100) Function beInitStream(var pbeConfig: TBE_Config; var dwSample: LongWord; var dwBufferSize: LongWord; var phbeStream: THBE_STREAM): BE_ERR; cdecl; external 'Lame_enc.dll'; Function beEncodeChunk(hbeStream: THBE_STREAM; nSamples: LongWord; var pSample; var pOutput; var pdwOutput: LongWord): BE_ERR; cdecl; external 'Lame_enc.dll'; Function beDeinitStream(hbeStream: THBE_STREAM; var pOutput; var pdwOutput: LongWord): BE_ERR; cdecl; external 'Lame_enc.dll'; Function beCloseStream(hbeStream: THBE_STREAM): BE_ERR; cdecl; external 'Lame_enc.dll'; Procedure beVersion(var pbeVersion: TBE_Version); cdecl; external 'Lame_enc.dll'; // Added header for beWriteVBRHeader Procedure beWriteVBRHeader(MP3FileName: pAnsiChar); cdecl; external 'Lame_enc.dll'; Procedure EncodeWavToMP3(WaveFile, MP3File: string; BitRate: Integer); // BitRate 128 192 256 etc. implementation uses WinApi.MMSystem; { ---------------------------------------- } { The following functions retrieve the necessary info from the input-wave-file. } { Source: } { WaveUtils - Utility functions and data types } { by Kambiz R. Khojasteh } { } { kambiz@delphiarea.com } { http://www.delphiarea.com } function mmioStreamProc(lpmmIOInfo: PMMIOInfo; uMsg, lParam1, lParam2: DWORD) : LRESULT; stdcall; var Stream: TStream; begin if Assigned(lpmmIOInfo) and (lpmmIOInfo^.adwInfo[0] <> 0) then begin Stream := TStream(lpmmIOInfo^.adwInfo[0]); case uMsg of MMIOM_OPEN: begin if TObject(lpmmIOInfo^.adwInfo[0]) is TStream then begin Stream.Seek(0, SEEK_SET); lpmmIOInfo^.lDiskOffset := 0; Result := MMSYSERR_NOERROR; end else Result := -1; end; MMIOM_CLOSE: Result := MMSYSERR_NOERROR; MMIOM_SEEK: try if lParam2 = SEEK_CUR then Stream.Seek(lpmmIOInfo^.lDiskOffset, SEEK_SET); Result := Stream.Seek(lParam1, lParam2); lpmmIOInfo^.lDiskOffset := Result; except Result := -1; end; MMIOM_READ: try Stream.Seek(lpmmIOInfo^.lDiskOffset, SEEK_SET); Result := Stream.Read(Pointer(lParam1)^, lParam2); lpmmIOInfo^.lDiskOffset := Stream.Seek(0, SEEK_CUR); except Result := -1; end; MMIOM_WRITE, MMIOM_WRITEFLUSH: try Stream.Seek(lpmmIOInfo^.lDiskOffset, SEEK_SET); Result := Stream.Write(Pointer(lParam1)^, lParam2); lpmmIOInfo^.lDiskOffset := Stream.Seek(0, SEEK_CUR); except Result := -1; end else Result := MMSYSERR_NOERROR; end; end else Result := -1; end; function OpenStreamWaveAudio(Stream: TStream): HMMIO; var mmIOInfo: TMMIOINFO; begin FillChar(mmIOInfo, SizeOf(mmIOInfo), 0); mmIOInfo.pIOProc := @mmioStreamProc; mmIOInfo.adwInfo[0] := DWORD(Stream); Result := mmioOpen(nil, @mmIOInfo, MMIO_READWRITE); end; function GetWaveAudioInfo(mmIO: HMMIO; var pWaveFormat: PWaveFormatEx; var DataSize, DataOffset: DWORD): Boolean; function GetWaveFormat(const ckRIFF: TMMCKInfo): Boolean; var ckFormat: TMMCKInfo; begin Result := False; ckFormat.ckid := mmioStringToFOURCC('fmt', 0); if (mmioDescend(mmIO, @ckFormat, @ckRIFF, MMIO_FINDCHUNK) = MMSYSERR_NOERROR) and (ckFormat.cksize >= SizeOf(TWaveFormat)) then begin if ckFormat.cksize < SizeOf(TWaveFormatEx) then begin GetMem(pWaveFormat, SizeOf(TWaveFormatEx)); FillChar(pWaveFormat^, SizeOf(TWaveFormatEx), 0); end else GetMem(pWaveFormat, ckFormat.cksize); Result := (mmioRead(mmIO, pAnsiChar(pWaveFormat), ckFormat.cksize) = Integer(ckFormat.cksize)); end; end; function GetWaveData(const ckRIFF: TMMCKInfo): Boolean; var ckData: TMMCKInfo; begin Result := False; ckData.ckid := mmioStringToFOURCC('data', 0); if (mmioDescend(mmIO, @ckData, @ckRIFF, MMIO_FINDCHUNK) = MMSYSERR_NOERROR) then begin DataSize := ckData.cksize; DataOffset := ckData.dwDataOffset; Result := True; end; end; var ckRIFF: TMMCKInfo; OrgPos: Integer; begin Result := False; OrgPos := mmioSeek(mmIO, 0, SEEK_CUR); try mmioSeek(mmIO, 0, SEEK_SET); ckRIFF.fccType := mmioStringToFOURCC('WAVE', 0); if (mmioDescend(mmIO, @ckRIFF, nil, MMIO_FINDRIFF) = MMSYSERR_NOERROR) then begin pWaveFormat := nil; if GetWaveFormat(ckRIFF) and GetWaveData(ckRIFF) then Result := True else if Assigned(pWaveFormat) then ReallocMem(pWaveFormat, 0); end finally mmioSeek(mmIO, OrgPos, SEEK_SET); end; end; function GetStreamWaveAudioInfo(Stream: TStream; var pWaveFormat: PWaveFormatEx; var DataSize, DataOffset: DWORD): Boolean; var mmIO: HMMIO; begin Result := False; if Stream.Size <> 0 then begin mmIO := OpenStreamWaveAudio(Stream); if mmIO <> 0 then try Result := GetWaveAudioInfo(mmIO, pWaveFormat, DataSize, DataOffset); finally mmioClose(mmIO, MMIO_FHOPEN); end; end; end; Procedure EncodeWavToMP3(WaveFile, MP3File: string; BitRate: Integer); var beConfig: TBE_Config; dwSamples, dwSamplesMP3: LongWord; hbeStream: THBE_STREAM; error: BE_ERR; pBuffer: PSmallInt; pMP3Buffer: PByte; done: LongWord; dwWrite: LongWord; ToRead: LongWord; ToWrite: LongWord; // changed from THandle to TFileStream fs, ft: TFileStream; TotalSize: DWORD; // variables to hold the wave info necessary for encoding pWaveFormat: PWaveFormatEx; DataOffset, DataSize, InputSampleRate: DWORD; begin beConfig.dwConfig := BE_CONFIG_LAME; fs := TFileStream.Create(WaveFile, fmOpenRead or fmShareDenyWrite); ft := TFileStream.Create(MP3File, fmCreate or fmShareDenyWrite); try TotalSize := fs.Size; // obtain info from source wave file try if not GetStreamWaveAudioInfo(fs, pWaveFormat, DataSize, DataOffset) then raise Exception.Create ('Unable to obtain necessary info from wave file.'); if (pWaveFormat.nChannels <> 2) or (pWaveFormat.wBitsPerSample <> 16) then raise Exception.Create('Wave format must be 16bit Stereo.'); InputSampleRate := pWaveFormat.nSamplesPerSec; finally FreeMem(pWaveFormat); end; // Structure information beConfig.format.lhv1.dwStructVersion := 1; beConfig.format.lhv1.dwStructSize := SizeOf(beConfig); // Basic encoder setting beConfig.format.lhv1.dwSampleRate := InputSampleRate; beConfig.format.lhv1.dwReSampleRate := InputSampleRate; beConfig.format.lhv1.nMode := BE_MP3_MODE_STEREO; beConfig.format.lhv1.dwBitrate := BitRate; beConfig.format.lhv1.dwMaxBitrate := BitRate; beConfig.format.lhv1.nQuality := 4; beConfig.format.lhv1.dwMpegVersion := 1; // MPEG1 beConfig.format.lhv1.dwPsyModel := 0; beConfig.format.lhv1.dwEmphasis := 0; // Bit Stream Settings beConfig.format.lhv1.bPrivate := False; beConfig.format.lhv1.bCRC := True; beConfig.format.lhv1.bCopyright := True; beConfig.format.lhv1.bOriginal := True; // VBR Stuff // Have it write a VBRHeader, as recommended by Lame, even though it's CBR beConfig.format.lhv1.bWriteVBRHeader := True; beConfig.format.lhv1.bEnableVBR := False; beConfig.format.lhv1.nVBRQuality := 0; error := beInitStream(beConfig, dwSamples, dwSamplesMP3, hbeStream); if error = BE_ERR_SUCCESSFUL then begin pBuffer := AllocMem(dwSamples * 2); pMP3Buffer := AllocMem(dwSamplesMP3); try // Position the source file stream at the beginning of the PCM-data: done := DataOffset; fs.Seek(DataOffset, soFromBeginning); While (done < TotalSize) do begin if (done + dwSamples * 2 < TotalSize) then ToRead := dwSamples * 2 else begin ToRead := TotalSize - done; FillChar(pBuffer^, dwSamples * 2, 0); end; fs.Read(pBuffer^, ToRead); error := beEncodeChunk(hbeStream, ToRead div 2, pBuffer^, pMP3Buffer^, ToWrite); if error <> BE_ERR_SUCCESSFUL then begin beCloseStream(hbeStream); raise Exception.Create('Encoding Error'); end; ft.Write(pMP3Buffer^, ToWrite); done := done + ToRead; end; error := beDeinitStream(hbeStream, pMP3Buffer^, dwWrite); if error <> BE_ERR_SUCCESSFUL then begin beCloseStream(hbeStream); raise Exception.Create('Close Error'); end; if dwWrite <> 0 then begin ft.Write(pMP3Buffer^, dwWrite); end; error := beCloseStream(hbeStream); if error <> BE_ERR_SUCCESSFUL then begin raise Exception.Create('Close Error'); end; finally FreeMem(pBuffer); FreeMem(pMP3Buffer); end; end else begin Raise Exception.Create('InitStream failure'); end; finally fs.free; ft.free; end; beWriteVBRHeader(pAnsiChar(AnsiString(MP3File))); end; end.
8. ## Delphi 11.1 - a month later

This Delphi 11.1 version is indeed a very good version. But I am still starting it in 'High DPI unaware' mode. There are for me still too many issues with High DPI. Else....I like it a lot!!!
9. ## Indy & OpenSSL 1.1.1 & TLS 1.3

The main reason it hasn't been merged yet is because I just haven't had any time to review it - I don't question that it "works" in general (I've seen enough people say it does), but I still need to see how consistent it fits with the rest of the library, if all of the necessary package/IDE support is in place, how it handles the multiple platforms Indy runs on, etc. The occasional issues being reported in the PR with regards to compiler/runtime errors, etc. As well as this is kind of a big feature to maybe warrant pushing Indy into a new versioning scheme that is long overdue. So, a lot of behind-the-scenes stuff that has made me hesitant to just merge it blindly.
10. ## Connect to wss://

Hi again Angus. So I've got Web Sockets working in my application, everything connects as it should, and I can send a welcome message in the Connected event. Problem now is that once the connection is established, if I then send a string to the client(s), the browser immediately disconnects from the Web Socket connection. Delphi: s : string; n : integer; b : integer; ... s := 'Hello'; for n := 0 to WebSocketServer.ClientCount-1 do begin b := WebSocketServer.Client[n].SendStr(s); end; b does indeed show the correct number of characters have been sent. The HTML is taken directly from your sample: function init(){ var host = "ws://127.0.0.1:42071/xcs"; try { socket = new WebSocket(host); log('WebSocket - status '+socket.readyState); socket.onopen = function(msg){ log("Welcome - status "+this.readyState); }; socket.onmessage = function(msg){ log("Received ("+msg.data.length+" bytes): " + (msg.data.length < 5000 ? msg.data : (msg.data.substr(0, 30) + '…'))); }; socket.onclose = function(msg){ log("Disconnected - status "+this.readyState); }; } catch(ex) { log(ex); } } Any idea what I'm doing wrong?
11. ## Android: Opening files in external application

Mustafa, Great job putting together that readme for your github repo. I like the inline samples and android version cross references.
12. ## Making Delphi 2007 HighDPI-aware

It was fun playing around with this, but the result is a bit disappointing once you get over the first "wow, it works". Just in case anybody else wants to have a go, here is the result of the last two days of "work". Note that the source checks whether Application.ExeName is 'hbds.exe' to decide whether to install the wizard or not. To get this to work, you will either have to remove that check or copy the bds.* files in the Delphi 2007 bin directory to hbds.* and of course set the Windows compatibility options for that hbds.exe rather than for bds.exe . It will add a new menu "High DPI" to the IDE's main menu with two entries "patch" and "un-patch" which should be self explanatory. Have fun, but remember: I will not fix your computer if you break it. 😉 @Attila Kovacs thanks for that idea which was quite fun to play around with. Take whatever you can use from the attached sources. Delphi2007HighDpi.zip
13. ## Making Delphi 2007 HighDPI-aware

Yes, this seems to work, even when reading it and setting it to the same value. It also makes the OnMeasureItem event redundant. (edit: No that event is still necessary.) That solves the problem for the tree view, but unfortunately not for the TVirtualTreeViews used in grid mode (e.g. the message window or the breakpoint list). There even setting the font size does not make any difference.

Yes.
15. ## Making Delphi 2007 HighDPI-aware

Thank you, this helps a lot, I wish I knew it earlier. Edit: Setting the Indent property changes the layout immediately, DefaultNodeHeight not. I think if you need that on the fly you have to iterate through the nodes and set its height or invalidate them one by one. But I would not do that as it makes no sense changing it runtime but as I said, checking at startup if the IDE is starting in HDPI mode or not via the registry.
16. ## JEDI Installation Annoyances 10.4

Hello, to compile JCL, firstly, You must change the project settings of the Delphi Version Package. In my situation, I use the package project configuration for Delphi 10.4 Community Edition: .\packages\d27\Jcl.dproj The installer only runs in GUI mode, and Community Edition of Rad Studio (Delphi 10.4) does not support command line (Windows MS-DOS Console) installation. But this issue should You be faced with a run of installer.bat A incorrect compilation can be imaging, that the Delphi Compiler complain, that he can not write the Jcl270.bpl in the public Emberarcado Studio 21.0 directory. It is a little bit hand work needed, when You would like compile the JCL pacakges for all platforms (win32, and win64) - (Debug, Release). I did this, and I get a installable Jcl270.bpl file in my .\win32\Debug\bpl settings folder. Here, I have only the German version of Delphi 10.4, so the following paragraph(s) can be differ in the translation to English ... here comes my settings: State for Windows 32-Bit Release: Menu -> Project -> Options Create -> Delphi Compiler: - output folder for Units: G:\Delphi\jcl\jcl\lib\d27\win32\Release\dcu\ - output folder for DCP: G:\Delphi\jcl\jcl\lib\d27\win32\Release\dcp\ - output folder for Packages: G:\Delphi\jcl\jcl\lib\d27\win32\Release\bpl\ - search path: G:\Delphi\jcl\jcl\lib\d27\win32\Release\dcu;G:\Delphi\jcl\jcl\source\include Create -> Delphi Compiler -> Output C/C++ : - C/C++ .bpi output folder: G:\Delphi\jcl\jcl\lib\d27\win64\Release\bpi\ - C/C++ .hpp output folder: G:\Delphi\jcl\jcl\lib\d27\win64\Release\hpp\ - C/C++ .obj output folder: G:\Delphi\jcl\jcl\lib\d27\win64\Release\obj\ - Create C/C++ output: create only DCU files State for Windows 32-Bit Debug Menu -> Project -> Options Create -> Delphi Compiler: - output folder for Units: G:\Delphi\jcl\jcl\lib\d27\win32\Debug\dcu\ - output folder for DCP: G:\Delphi\jcl\jcl\lib\d27\win32\Debug\dcp\ - output folder for Packages: G:\Delphi\jcl\jcl\lib\d27\win32\Debug\bpl\ - search path: G:\Delphi\jcl\jcl\lib\d27\win32\Debug\dcu;G:\Delphi\jcl\jcl\source\include Create -> Delphi Compiler -> Output C/C++ : - C/C++ .bpi output folder: G:\Delphi\jcl\jcl\lib\d27\win32\Debug\bpi\ - C/C++ .hpp output folder: G:\Delphi\jcl\jcl\lib\d27\win32\Debug\hpp\ - C/C++ .obj output folder: G:\Delphi\jcl\jcl\lib\d27\win32\Debug\obj\ - Create C/C++ output: create only DCU files State for Windows 64-Bit Release: Menu -> Project -> Options Create -> Delphi Compiler: - output folder for Units: G:\Delphi\jcl\jcl\lib\d27\win64\Release\dcu\ - output folder for DCP: G:\Delphi\jcl\jcl\lib\d27\win64\Release\dcp\ - output folder for Packages: G:\Delphi\jcl\jcl\lib\d27\win64\Release\bpl\ - search path: G:\Delphi\jcl\jcl\lib\d27\win64\Release\dcu;G:\Delphi\jcl\jcl\source\include Create -> Delphi Compiler -> Output C/C++ : - C/C++ .bpi output folder: G:\Delphi\jcl\jcl\lib\d27\win64\Release\bpi\ - C/C++ .hpp output folder: G:\Delphi\jcl\jcl\lib\d27\win64\Release\hpp\ - C/C++ .obj output folder: G:\Delphi\jcl\jcl\lib\d27\win64\Release\obj\ - Create C/C++ output: create only DCU files State for Windows 64-Bit Debug Menu -> Project -> Options Create -> Delphi Compiler: - output folder for Units: G:\Delphi\jcl\jcl\lib\d27\win64\Debug\dcu\ - output folder for DCP: G:\Delphi\jcl\jcl\lib\d27\win64\Debug\dcp\ - output folder for Packages: G:\Delphi\jcl\jcl\lib\d27\win64\Debug\bpl\ - search path: G:\Delphi\jcl\jcl\lib\d27\win64\Debug\dcu;G:\Delphi\jcl\jcl\source\include Create -> Delphi Compiler -> Output C/C++ : - C/C++ .bpi output folder: G:\Delphi\jcl\jcl\lib\d27\win64\Debug\bpi\ - C/C++ .hpp output folder: G:\Delphi\jcl\jcl\lib\d27\win64\Debug\hpp\ - C/C++ .obj output folder: G:\Delphi\jcl\jcl\lib\d27\win64\Debug\obj\ - Create C/C++ output: create only DCU files I hope this help You, to make the right decision. Thank You for reading, paule32
17. ## Making Delphi 2007 HighDPI-aware

I don't remember that. I probably was busy at the time and then forgot about it. Did you file (a) bug report(s)?
18. ## Delphi 11.1 - a month later

Can you please elaborate on that?
19. ## Delphi 11.1 - a month later

I agree with most of your observations and 11.1 is a lot better in may ways - but for me, ctrl-click is failing most of the time and some of the automatic code completion gets in the way more. I've increased the delay and rely on it less. It seems almost what 10.4 should have been.
20. ## Is TOmniValue thread safe?

On general, no. In specific cases maybe yes.
21. ## Delphi 11.1 - a month later

Agreed that they have done a good job. The cumulative effect of the last few releases being more focused on bug fixes, IDE improvements is now paying off. F2084 Internal Error - I forgot about that one as I have not seen that in a while now! Thankfully 🙂 I also like the more regular patching, and hope they continue to drop bundles of fixes more often. Keeps people happy when they see progress on the things that are blocking them. Would be great to see a roadmap too. No idea what is happening next!

Manually 🙂
23. ## Indy & OpenSSL 1.1.1 & TLS 1.3

I totally agree. And I have been meaning to reach out to the community for a long time looking for volunteers to join the dev team on a more regular basis, I just haven't gotten around to it. Well, it is still being actively maintained, as in it receives updates for fixes, and adding minor features that are easy to add to the existing code. But major updates have been delayed for a long time. Namely, releasing Indy 11 (maintenance release to drop pre-Unicode compilers, restructure the runtime packages, etc) and starting on Indy 12 (major new features, logic rewrites, etc) has been on the back-burner for many years now. Actually, Indy 11 is almost ready, but without an IDE I haven't been able to test the new structure and finalize it.
24. ## Is Move the fastest way to copy memory?

Don't expect anything magic by using mORMot MoveFast(). Perhaps a few percent more or less. On Win32 - which is your target, IIRC the Delphi RTL uses X87 registers. On this platform, MoveFast() use SSE2 registers for small sizes, so is likely to be slightly faster, and will leverage ERMSB move (i.e. rep movsb) on newer CPUs which support it. To be fair, mORMot asm is more optimized for x86_64 than for i386 - because it is the target platform for server side, which is the one needing more optimization. But I would just try all FastCode variants - some can be very verbose, but "may" be better. What I would do in your case, is trying to not move any data at all. Isn't it possible that you pre-allocate a set of buffers, then just consume them in a circular way, passing them from the acquisition to the processing methods as pointers, with no copy? The fastest move() is ... when there is no move... 🙂
25. ## Skia4Delphi

Website: github.com/viniciusfbb/skia4delphi Skia4Delphi is a cross-platform 2D graphics API for Delphi based on Google's Skia Graphics Library (skia.org). Google's Skia Graphics Library serves as the graphics engine for Google Chrome and Chrome OS, Android, Flutter, Xamarin, Mozilla Firefox and Firefox OS, and many other products. Skia provides a more robust Canvas, being very fast and very stable, with hundreds of features for drawing 2D graphics, in addition to a text shaping engine designed to render texts in the most diverse languages with right-to-left support (such as the Persian language), full support for loading SVG files, support for creating PDF files, support for rendering Lottie files (verotized animations created in Adobe After Effects), integration with the GPU, among countless other cool features. Skia's idea is similar to Firemonkey's, the same codebase used in an OS will work the same on other platforms. It is also possible to design using the CPU in independent background threads. Skia also has native codecs, of course if you don't use the SKCodec class, when loading an encoded image it will give priority to using the platform's native codec, but it is possible to use its codec, for example for jpeg files it uses libjpeg-turbo and for png files libpng which maybe in certain environments may perform better than native. See some examples: Advanced shapes Advanced text rendering / shaping Svg Lottie files And much more...
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