FastReport_FMX_2.8.12/Source/FMX.frxCanvas.Mac.pas

{******************************************}
{                                          }
{             FastReport FMX v2.8          }
{          Canvas for printing bitmap      }
{             when using MetalAPI          }
{                                          }
{            Copyright (c) 2021            }
{            Fast Reports Inc.             }
{                                          }
{******************************************}

unit FMX.frxCanvas.Mac;

{$H+}

interface

uses
  System.Types, System.Math.Vectors, System.UIConsts, System.Classes, System.SysUtils, System.Math, System.UITypes,
  System.Character, System.Generics.Collections, Macapi.CocoaTypes, Macapi.CoreGraphics, Macapi.CoreFoundation,
  Macapi.ImageIO, Macapi.CoreText, Macapi.Helpers, FMX.Types, FMX.Platform, FMX.Printer, FMX.Printer.Mac, FMX.Consts,
  FMX.Forms, FMX.TextLayout, FMX.Surfaces, FMX.Graphics, FMX.Canvas.Mac;

type

  TfrxCanvasQuartz = class(TCanvasQuartz)
  protected
    procedure DoDrawBitmap(const ABitmap: TBitmap; const SrcRect, DstRect: TRectF;
      const AOpacity: Single; const HighSpeed: Boolean = False); override;
  public
    constructor CreateFromPrinter(const APrinter: TAbstractPrinter); override;
  end;

implementation

uses
  Macapi.PrintCore;
 var
  GlobalColorSpace: CGColorSpaceRef;

function ColorSpace: CGColorSpaceRef;
begin
  if GlobalColorSpace = nil then
    GlobalColorSpace := CGColorSpaceCreateDeviceRGB;
  Result := GlobalColorSpace;
end;

constructor TfrxCanvasQuartz.CreateFromPrinter(
  const APrinter: TAbstractPrinter);
begin
  inherited;
end;

{ TfrxCanvasQuartz }

procedure TfrxCanvasQuartz.DoDrawBitmap(const ABitmap: TBitmap;
  const SrcRect, DstRect: TRectF; const AOpacity: Single;
  const HighSpeed: Boolean);
var
  B: TObject;
  pData, LContext: Pointer;
  NewDestRect, SubRect: CGRect;
  ImageRef, SubImageRef: CGImageRef;
  Surf: TBitmapSurface;
begin
  if (Context = nil) or (ABitmap = nil)  then Exit;
  if ABitmap.HandleAllocated then
  begin
    B := TObject(ABitmap.Handle);
    if (B is TQuartzBitmap) then
      inherited DoDrawBitmap(ABitmap, SrcRect, DstRect, AOpacity, HighSpeed)
    else
    begin
      Surf := TBitmapSurface.Create;
      try
        Surf.Assign(ABitmap);

        if Surf.PixelFormat = TPixelFormat.RGBA then
          LContext := CGBitmapContextCreate(Surf.Bits, Surf.Width, Surf.Height,
            8, Surf.Pitch, ColorSpace, kCGImageAlphaPremultipliedLast)
        else
        begin
          LContext := CGBitmapContextCreate(nil, Surf.Width, Surf.Height, 8,
            Surf.Pitch, ColorSpace, kCGImageAlphaPremultipliedLast);
          pData := CGBitmapContextGetData(LContext);
          ChangePixelFormat(Surf.Bits, pData, Surf.Width * Surf.Height,
            Surf.PixelFormat, TPixelFormat.RGBA);
        end;

        if LContext <> nil then
        begin
          ImageRef := CGBitmapContextCreateImage(LContext);
          if ImageRef <> nil then
            try

              NewDestRect := CGRectFromRect(DstRect);

              if (SrcRect.Left = 0) and (SrcRect.Top = 0) and
                (SrcRect.Right = ABitmap.Width) and
                (SrcRect.Bottom = ABitmap.Height) then
              begin
                CGContextSaveGState(Context);
                CGContextSetAlpha(Context, AOpacity);

                if HighSpeed then
                  CGContextSetInterpolationQuality(Context,
                    kCGInterpolationNone)
                else
                  CGContextSetInterpolationQuality(Context,
                    kCGInterpolationDefault);

                NewDestRect.origin.y := -DstRect.Bottom;
                CGContextScaleCTM(Context, 1, -1);

                CGContextSetAllowsAntialiasing(Context, False);
                CGContextDrawImage(Context, NewDestRect, ImageRef);
                CGContextSetAllowsAntialiasing(Context, True);

                CGContextRestoreGState(Context);
              end
              else
              begin
                SubRect := CGRectFromRect(SrcRect);

                SubImageRef := CGImageCreateWithImageInRect(ImageRef, SubRect);
                if SubImageRef <> nil then
                begin
                  CGContextSaveGState(Context);
                  CGContextSetAlpha(Context, AOpacity);

                  if HighSpeed then
                    CGContextSetInterpolationQuality(Context,
                      kCGInterpolationNone)
                  else
                    CGContextSetInterpolationQuality(Context,
                      kCGInterpolationDefault);

                  NewDestRect.origin.y := -DstRect.Bottom;
                  CGContextScaleCTM(Context, 1, -1);

                  CGContextDrawImage(Context, NewDestRect, SubImageRef);
                  CGImageRelease(SubImageRef);

                  CGContextRestoreGState(Context);
                end;
              end;

            finally
              if ImageRef <> nil then
                CGImageRelease(ImageRef);
              if LContext <> nil then
                CGContextRelease(LContext);
            end;
        end;
      finally
        Surf.Free;
      end;
    end;
  end;
end;

initialization
  TTextLayoutManager.RegisterTextLayout(TTextLayoutCT, TfrxCanvasQuartz);
finalization

end.