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107 lines
3.1 KiB
ObjectPascal
107 lines
3.1 KiB
ObjectPascal
{ $Id$ }
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{
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----------------------------------
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qtproc.pp - qt interface procs
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----------------------------------
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@lastmod($Date$)
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@author(Marc Weustink <marc@@lazarus.dommelstein.net>)
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This unit contains procedures/functions needed for the qt <-> LCL interface
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}
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{
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*****************************************************************************
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* *
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* This file is part of the Lazarus Component Library (LCL) *
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* *
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* See the file COPYING.modifiedLGPL.txt, included in this distribution, *
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* for details about the copyright. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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*****************************************************************************
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}
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unit qtproc;
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{$mode objfpc}{$H+}
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interface
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{$I qtdefines.inc}
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uses
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qt4,
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GraphType,
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LCLProc;
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procedure FillStandardDescription(var Desc: TRawImageDescription);
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function GetPixelsPerInch: Integer;
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function GetUtf8String(S: String): WideString;
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implementation
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{------------------------------------------------------------------------------
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Function: FillStandardDescription
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Params:
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Returns:
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------------------------------------------------------------------------------}
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procedure FillStandardDescription(var Desc: TRawImageDescription);
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begin
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Desc.Init;
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Desc.Format := ricfRGBA;
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// Desc.Width := 0
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// Desc.Height := 0
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// Desc.PaletteColorCount := 0;
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Desc.BitOrder := riboReversedBits;
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Desc.ByteOrder := riboLSBFirst;
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Desc.LineOrder := riloTopToBottom;
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Desc.BitsPerPixel := 32;
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Desc.Depth := 32;
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// Qt wants dword-aligned data
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Desc.LineEnd := rileDWordBoundary;
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// 8-8-8-8 mode, high byte is Alpha
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Desc.AlphaPrec := 8;
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Desc.RedPrec := 8;
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Desc.GreenPrec := 8;
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Desc.BluePrec := 8;
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Desc.AlphaShift := 24;
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Desc.RedShift := 16;
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Desc.GreenShift := 8;
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// Desc.BlueShift := 0;
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// Qt wants dword-aligned data
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Desc.MaskLineEnd := rileDWordBoundary;
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Desc.MaskBitOrder := riboReversedBits;
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Desc.MaskBitsPerPixel := 1;
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// Desc.MaskShift := 0;
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end;
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function GetUtf8String(S: String): WideString;
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begin
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Result := UTF8ToUTF16(S);
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if (Result = '') and (S <> '') then
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Result := S;
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end;
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{------------------------------------------------------------------------------
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Function: GetPixelsPerInch
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Params: none
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Returns: pixels per inch value eg. 96
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------------------------------------------------------------------------------}
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function GetPixelsPerInch: Integer;
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var
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QtDC: QPaintDeviceH;
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begin
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QtDC := QWidget_to_QPaintDevice(QApplication_desktop);
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Result := QPaintDevice_logicalDpiY(QtDC);
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end;
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end.
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