{ Free Pascal port of the OpenPTC C++ library. Copyright (C) 2001-2003, 2006, 2007, 2009-2011 Nikolay Nikolov (nickysn@users.sourceforge.net) Original C++ version by Glenn Fiedler (ptc@gaffer.org) This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version with the following modification: As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules,and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA } type TPTCSurface = class(TInterfacedObject, IPTCSurface) private {data} FWidth: Integer; FHeight: Integer; FPitch: Integer; FArea: IPTCArea; FClip: IPTCArea; FFormat: IPTCFormat; FLocked: Boolean; FPixels: Pointer; {objects} FCopy: TPTCCopy; FClear: TPTCClear; FPalette: IPTCPalette; public constructor Create(AWidth, AHeight: Integer; AFormat: IPTCFormat); destructor Destroy; override; procedure Copy(ASurface: IPTCSurface); procedure Copy(ASurface: IPTCSurface; ASource, ADestination: IPTCArea); function Lock: Pointer; procedure Unlock; procedure Load(const APixels: Pointer; AWidth, AHeight, APitch: Integer; AFormat: IPTCFormat; APalette: IPTCPalette); procedure Load(const APixels: Pointer; AWidth, AHeight, APitch: Integer; AFormat: IPTCFormat; APalette: IPTCPalette; ASource, ADestination: IPTCArea); procedure Save(APixels: Pointer; AWidth, AHeight, APitch: Integer; AFormat: IPTCFormat; APalette: IPTCPalette); procedure Save(APixels: Pointer; AWidth, AHeight, APitch: Integer; AFormat: IPTCFormat; APalette: IPTCPalette; ASource, ADestination: IPTCArea); procedure Clear; procedure Clear(AColor: IPTCColor); procedure Clear(AColor: IPTCColor; AArea: IPTCArea); procedure Palette(APalette: IPTCPalette); function Palette: IPTCPalette; procedure Clip(AArea: IPTCArea); function GetWidth: Integer; function GetHeight: Integer; function GetPitch: Integer; function GetArea: IPTCArea; function Clip: IPTCArea; function GetFormat: IPTCFormat; function Option(const AOption: string): Boolean; property Width: Integer read GetWidth; property Height: Integer read GetHeight; property Pitch: Integer read GetPitch; property Area: IPTCArea read GetArea; property Format: IPTCFormat read GetFormat; end; class function TPTCSurfaceFactory.CreateNew(AWidth, AHeight: Integer; AFormat: IPTCFormat): IPTCSurface; begin Result := TPTCSurface.Create(AWidth, AHeight, AFormat); end; constructor TPTCSurface.Create(AWidth, AHeight: Integer; AFormat: IPTCFormat); var size: Integer; begin FLocked := False; LOG('creating surface'); LOG('width', AWidth); LOG('height', AHeight); LOG('format', AFormat); FWidth := AWidth; FHeight := AHeight; FFormat := AFormat; FArea := TPTCArea.Create(0, 0, AWidth, AHeight); FClip := TPTCArea.Create(FArea); FPitch := AWidth * AFormat.Bytes; size := AWidth * AHeight * AFormat.Bytes; if size = 0 then raise TPTCError.Create('zero surface size'); FPixels := GetMem(size); FCopy := TPTCCopy.Create; FClear := TPTCClear.Create; FPalette := TPTCPalette.Create; clear; end; destructor TPTCSurface.Destroy; begin if FLocked then begin LOG('destroying surface that is still locked!!!'); end; FCopy.Free; FClear.Free; FreeMem(FPixels); inherited Destroy; end; procedure TPTCSurface.Copy(ASurface: IPTCSurface); begin ASurface.Load(FPixels, FWidth, FHeight, FPitch, FFormat, FPalette); end; procedure TPTCSurface.Copy(ASurface: IPTCSurface; ASource, ADestination: IPTCArea); begin ASurface.Load(FPixels, FWidth, FHeight, FPitch, FFormat, FPalette, ASource, ADestination); end; function TPTCSurface.Lock: Pointer; begin if FLocked then raise TPTCError.Create('surface is already locked'); FLocked := True; Result := FPixels; end; procedure TPTCSurface.Unlock; begin if not FLocked then raise TPTCError.Create('surface is not locked'); FLocked := False; end; procedure TPTCSurface.Load(const APixels: Pointer; AWidth, AHeight, APitch: Integer; AFormat: IPTCFormat; APalette: IPTCPalette); begin if FClip.Equals(FArea) then begin FCopy.Request(AFormat, FFormat); FCopy.Palette(APalette, FPalette); FCopy.Copy(APixels, 0, 0, AWidth, AHeight, APitch, FPixels, 0, 0, FWidth, FHeight, FPitch); end else Load(APixels, AWidth, AHeight, APitch, AFormat, APalette, TPTCArea.Create(0, 0, AWidth, AHeight), FArea); end; procedure TPTCSurface.Load(const APixels: Pointer; AWidth, AHeight, APitch: Integer; AFormat: IPTCFormat; APalette: IPTCPalette; ASource, ADestination: IPTCArea); var clipped_source: IPTCArea; clipped_destination: IPTCArea; begin TPTCClipper.Clip(ASource, TPTCArea.Create(0, 0, AWidth, AHeight), clipped_source, ADestination, FClip, clipped_destination); FCopy.Request(AFormat, FFormat); FCopy.Palette(APalette, FPalette); FCopy.Copy(APixels, clipped_source.left, clipped_source.top, clipped_source.width, clipped_source.height, APitch, FPixels, clipped_destination.left, clipped_destination.top, clipped_destination.width, clipped_destination.height, FPitch); end; procedure TPTCSurface.Save(APixels: Pointer; AWidth, AHeight, APitch: Integer; AFormat: IPTCFormat; APalette: IPTCPalette); begin if FClip.Equals(FArea) then begin FCopy.Request(FFormat, AFormat); FCopy.Palette(FPalette, APalette); FCopy.Copy(FPixels, 0, 0, FWidth, FHeight, FPitch, APixels, 0, 0, AWidth, AHeight, APitch); end else Save(APixels, AWidth, AHeight, APitch, AFormat, APalette, FArea, TPTCArea.Create(0, 0, width, height)); end; procedure TPTCSurface.Save(APixels: Pointer; AWidth, AHeight, APitch: Integer; AFormat: IPTCFormat; APalette: IPTCPalette; ASource, ADestination: IPTCArea); var clipped_source: IPTCArea; clipped_destination: IPTCArea; begin TPTCClipper.Clip(ASource, FClip, clipped_source, ADestination, TPTCArea.Create(0, 0, AWidth, AHeight), clipped_destination); FCopy.Request(FFormat, AFormat); FCopy.Palette(FPalette, APalette); FCopy.Copy(FPixels, clipped_source.left, clipped_source.top, clipped_source.width, clipped_source.height, FPitch, APixels, clipped_destination.left, clipped_destination.top, clipped_destination.width, clipped_destination.height, APitch); end; procedure TPTCSurface.Clear; var Color: IPTCColor; begin if Format.Direct then Color := TPTCColor.Create(0, 0, 0, 0) else Color := TPTCColor.Create(0); Clear(Color); end; procedure TPTCSurface.Clear(AColor: IPTCColor); begin Clear(AColor, FArea); end; procedure TPTCSurface.Clear(AColor: IPTCColor; AArea: IPTCArea); var clipped_area: IPTCArea; begin clipped_area := TPTCClipper.Clip(AArea, FClip); FClear.Request(FFormat); FClear.Clear(FPixels, clipped_area.left, clipped_area.top, clipped_area.width, clipped_area.height, FPitch, AColor); end; procedure TPTCSurface.Palette(APalette: IPTCPalette); begin FPalette.Load(APalette.Data^); end; function TPTCSurface.Palette: IPTCPalette; begin Result := FPalette; end; procedure TPTCSurface.Clip(AArea: IPTCArea); begin FClip := TPTCClipper.Clip(AArea, FArea); end; function TPTCSurface.GetWidth: Integer; begin Result := FWidth; end; function TPTCSurface.GetHeight: Integer; begin Result := FHeight; end; function TPTCSurface.GetPitch: Integer; begin Result := FPitch; end; function TPTCSurface.GetArea: IPTCArea; begin Result := FArea; end; function TPTCSurface.Clip: IPTCArea; begin Result := FClip; end; function TPTCSurface.GetFormat: IPTCFormat; begin Result := FFormat; end; function TPTCSurface.Option(const AOption: string): Boolean; begin Result := FCopy.Option(AOption); end;