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{
This file is part of the Free Pascal run time library.
Copyright (c) 2003 by the Free Pascal development team
Image conversion example.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
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.
**********************************************************************}
{$mode objfpc}{$h+}
program ImgConv;
{_$define UseFile}
uses FPWriteXPM, FPWritePNG, FPWriteBMP,
FPReadXPM, FPReadPNG, FPReadBMP, fpreadjpeg,fpwritejpeg,
fpreadtga,fpwritetga,fpreadpnm,fpwritepnm,
{$ifndef UseFile}classes,{$endif}
FPImage, sysutils;
var img : TFPMemoryImage;
reader : TFPCustomImageReader;
Writer : TFPCustomimageWriter;
ReadFile, WriteFile, WriteOptions : string;
procedure Init;
var t : char;
begin
if paramcount = 4 then
begin
T := upcase (paramstr(1)[1]);
if T = 'X' then
Reader := TFPReaderXPM.Create
else if T = 'B' then
Reader := TFPReaderBMP.Create
else if T = 'J' then
Reader := TFPReaderJPEG.Create
else if T = 'P' then
Reader := TFPReaderPNG.Create
else if T = 'T' then
Reader := TFPReaderTarga.Create
else if T = 'N' then
Reader := TFPReaderPNM.Create
else
begin
Writeln('Unknown file format : ',T);
Halt(1);
end;
ReadFile := paramstr(2);
WriteOptions := paramstr(3);
WriteFile := paramstr(4);
end
else
begin
Reader := nil;
ReadFile := paramstr(1);
WriteOptions := paramstr(2);
WriteFile := paramstr(3);
end;
WriteOptions := uppercase (writeoptions);
T := WriteOptions[1];
if T = 'X' then
Writer := TFPWriterXPM.Create
else if T = 'B' then
begin
Writer := TFPWriterBMP.Create;
TFPWriterBMP(Writer).BitsPerPixel:=32;
end
else if T = 'J' then
Writer := TFPWriterJPEG.Create
else if T = 'P' then
Writer := TFPWriterPNG.Create
else if T = 'T' then
Writer := TFPWriterTARGA.Create
else if T = 'N' then
Writer := TFPWriterPNM.Create
else
begin
Writeln('Unknown file format : ',T);
Halt(1);
end;
img := TFPMemoryImage.Create(0,0);
img.UsePalette:=false;
end;
procedure ReadImage;
{$ifndef UseFile}var str : TStream;{$endif}
begin
if assigned (reader) then
img.LoadFromFile (ReadFile, Reader)
else
{$ifdef UseFile}
img.LoadFromFile (ReadFile);
{$else}
if fileexists (ReadFile) then
begin
str := TFileStream.create (ReadFile,fmOpenRead);
try
img.loadFromStream (str);
finally
str.Free;
end;
end
else
writeln ('File ',readfile,' doesn''t exists!');
{$endif}
end;
procedure WriteImage;
var t : string;
begin
t := WriteOptions;
writeln (' WriteImage, options=',t);
if (t[1] = 'P') then
with (Writer as TFPWriterPNG) do
begin
Grayscale := pos ('G', t) > 0;
Indexed := pos ('I', t) > 0;
WordSized := pos('W', t) > 0;
UseAlpha := pos ('A', t) > 0;
writeln ('Grayscale ',Grayscale, ' - Indexed ',Indexed,
' - WordSized ',WordSized,' - UseAlpha ',UseAlpha);
end
else if (t[1] = 'X') then
begin
if length(t) > 1 then
with (Writer as TFPWriterXPM) do
begin
ColorCharSize := ord(t[2]) - ord('0');
end;
end;
writeln ('Options checked, now writing...');
img.SaveToFile (WriteFile, Writer);
end;
procedure Clean;
begin
Reader.Free;
Writer.Free;
Img.Free;
end;
begin
if (paramcount <> 4) and (paramcount <> 3) then
begin
writeln ('Give filename to read and to write, preceded by filetype:');
writeln ('X for XPM, P for PNG, B for BMP, J for JPEG, T for TGA,');
writeln ('N for PNM (read only)');
writeln ('example: imgconv X hello.xpm P hello.png');
writeln ('example: imgconv hello.xpm P hello.png');
writeln ('Options for');
writeln (' PNG : G : grayscale, A : use alpha, ');
writeln (' I : Indexed in palette, W : Word sized.');
writeln (' XPM : Number of chars to use for 1 pixel');
writeln (' The color size of an XPM can be set after the X as 1,2,3 or 4');
writeln ('example: imgconv hello.xpm PIA hello.png');
writeln ('example: imgconv hello.png X2 hello.xpm');
end
else
try
writeln ('Initing');
Init;
writeln ('Reading image');
ReadImage;
writeln ('Writing image');
WriteImage;
writeln ('Clean up');
Clean;
except
on e : exception do
writeln ('Error: ',e.message);
end;
end.
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