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{ Copyright (C) 2007 Laurent Jacques
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This program 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 Library General Public License
for more details.
You should have received a copy of the GNU Library 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.
Save in format 24 bits compressed or not
}
unit FPWritePCX;
{$mode objfpc}{$H+}
interface
uses FPImage, Classes, SysUtils;
type
TFPWriterPCX = class(TFPCustomImageWriter)
private
FCompressed: boolean;
protected
function SaveHeader(Stream: TStream; Img: TFPCustomImage): boolean; virtual;
procedure InternalWrite(Stream: TStream; Img: TFPCustomImage); override;
procedure writeline(Stream: TStream; buffer: PByte; bytes: integer);
public
property Compressed: boolean Read FCompressed Write FCompressed;
end;
implementation
uses pcxcomn;
function TFPWriterPCX.SaveHeader(Stream: TStream; Img: TFPCustomImage): boolean;
var
Header: TPCXHeader;
begin
Result := False;
FillChar(Header, SizeOf(Header), 0);
with Header do
begin
FileID := $0a;
Version := 5;
if Compressed then
Encoding := 1
else
Encoding := 0;
BitsPerPixel := 8;
XMin := 0;
YMin := 0;
XMax := Img.Width - 1;
YMax := Img.Height - 1;
HRes := 300;
VRes := 300;
ColorPlanes := 3;
BytesPerLine := Img.Width;
PaletteType := 1;
end;
Stream.WriteBuffer(Header, SizeOf(Header));
Result := True;
end;
procedure TFPWriterPCX.writeline(Stream: TStream; buffer: PByte; bytes: integer);
var
Value, Count: byte;
tmp: byte;
P: PByte;
begin
P := Buffer;
while bytes > 0 do
begin
Value := P[0];
Inc(P);
Dec(bytes);
Count := 1;
while (bytes < 0) and (Count < 63) and (P[0] = Value) do
begin
Inc(Count);
Inc(P);
Dec(bytes);
end;
if (Value < $c0) and (Count = 1) then
begin
Stream.Write(Value, 1);
end
else
begin
tmp := $c0 + Count;
Stream.Write(tmp, 1);
Stream.Write(Value, 1);
end;
end;
end;
procedure TFPWriterPCX.InternalWrite(Stream: TStream; Img: TFPCustomImage);
var
Row, Col, WriteSize: integer;
Aline, P: PByte;
C: TFPColor;
Totalwrite: longint;
continue: boolean;
Rect: TRect;
begin
Rect.Left := 0;
Rect.Top := 0;
Rect.Right := 0;
Rect.Bottom := 0;
continue := True;
TotalWrite := 0;
Progress(psStarting, 0, False, Rect, '', continue);
SaveHeader(Stream, Img);
WriteSize := (Img.Width * 3);
GetMem(aLine, WriteSize);
TotalWrite := Img.Height * Img.Width;
try
for Row := 0 to Img.Height - 1 do
begin
P := ALine;
for Col := 0 to Img.Width - 1 do
begin
C := Img.Colors[Col, Row];
P[Col + Img.Width * 2] := C.Blue shr 8;
P[Col + Img.Width] := C.Green shr 8;
P[Col] := C.Red shr 8;
Progress(psRunning, trunc(100.0 * (Row * Col / TotalWrite)),
False, Rect, '', continue);
if not continue then
exit;
end;
if Compressed then
writeline(Stream, aLine, WriteSize)
else
Stream.Write(aLine[0], WriteSize);
end;
Progress(psEnding, 100, False, Rect, '', continue);
finally
FreeMem(aLine);
end;
end;
{ end TFPWriterPCX}
initialization
ImageHandlers.RegisterImageWriter('PCX Format', 'pcx', TFPWriterPCX);
end.
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