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unit_tiff.pas
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unit_tiff.pas
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unit unit_tiff;
{Writes uncompressed tiff files from an image array}
{Based originally on 8 bit routines from bit2tiff.pas, BMP to TIFF, Freeware version 3.0 - Sep 10, 2000 by Wolfgang Krug}
{Heavily modified for 16bit integer and 32 bit float gray and colour. IFD directory placed at beginning file and fileposition and seek commands avoided. Added image Describtion}
{Copyright 2018, 2022 by Han Kleijn}
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
interface
uses
SysUtils, Classes,dialogs;
type
image_array = array of array of array of Single;
const bufwide=1024*120;{buffer size in bytes}
{16 bit procedures. not used in astap}
function save_tiff_16(img: image_array; filen2,description:ansistring;flip_H,flip_V:boolean): boolean;{save to 16 bit gray scale TIFF file }
function save_tiff_48(img: image_array; filen2,description:ansistring;flip_H,flip_V:boolean): boolean;{save to 48=3x16 color TIFF file }
{32 bit procedures}
function save_tiff_32(img: image_array; filen2,description:ansistring;flip_H,flip_V:boolean): boolean;{save to 32 bit float gray scale TIFF file }
function save_tiff_96(img: image_array; filen2,description:ansistring;flip_H,flip_V:boolean): boolean;{save to 96=3x32 color TIFF file }
implementation
type
TDirEntry = record
_Tag : Word;
_Type : Word;
_Count : LongInt;
_Value : LongInt;
end;
var
tiffbuffer32: array[0..trunc(bufwide/4)] of single; {bufwide is set in astap_main and is 120000}
tiffbuffer: array[0..bufwide] of byte absolute tiffbuffer32;
const
SoftwareName='ASTAP'+#0;{GIMP like to have this #0}
{ TIFF File Header: }
TifHeader : array[0..7] of Byte = (
$49, $49, { Intel byte order }
$2a, $00, { TIFF version (42) }
$08, $00, $00, $00 ); { Pointer to the first directory. Will be updated later }
size16=16;
NoOfDirsBW16 : array[0..1] of Byte = ( size16, $00 ); { Number of tags within the directory }
DirectoryBW16 : array[0..size16-1] of TDirEntry = (
( _Tag: $00FE; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {0 NewSubFile: Image with full solution (0) }
( _Tag: $0100; _Type: $0003; _Count: $00000001; _Value: $00000000 ), {1 ImageWidth: Value will be set later }
( _Tag: $0101; _Type: $0003; _Count: $00000001; _Value: $00000000 ), {2 ImageLength: Value will be set later }
( _Tag: $0102; _Type: $0003; _Count: $00000001; _Value: $00000010 ), {3 BitsPerSample $10=16 ,no address }
( _Tag: $0103; _Type: $0003; _Count: $00000001; _Value: $00000001 ), {4 Compression: No compression }
( _Tag: $0106; _Type: $0003; _Count: $00000001; _Value: $00000001 ), {5 PhotometricInterpretation: 1 = BlackIsZero.}
( _Tag: $010E; _Type: $0002; _Count: $0000000A; _Value: $00000000 ), {6 Image Description. _Count will be updated later }
( _Tag: $0111; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {7 StripOffsets: Ptr to the adress of the image data }
( _Tag: $0115; _Type: $0003; _Count: $00000001; _Value: $00000001 ), {8 SamplesPerPixels: 1 }
( _Tag: $0116; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {9 RowsPerStrip: Value will be set later }
( _Tag: $0117; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {10 StripByteCounts: xs*ys bytes pro strip }
( _Tag: $011A; _Type: $0005; _Count: $00000001; _Value: $00000000 ), {11 X-Resolution: Adresse }
( _Tag: $011B; _Type: $0005; _Count: $00000001; _Value: $00000000 ), {12 Y-Resolution: (Adresse) }
( _Tag: $0128; _Type: $0003; _Count: $00000001; _Value: $00000002 ), {13 Resolution Unit: (2)= Unit ZOLL }
( _Tag: $0131; _Type: $0002; _Count: $0000000A; _Value: $00000000 ), {14 Software: }
( _Tag: $0153; _Type: $0003; _Count: $00000001; _Value: $00000001 )); {15 Sampleformat integer=1 }
size32=16;
NoOfDirsBW32 : array[0..1] of Byte = ( size32, $00 ); { Number of tags within the directory }
DirectoryBW32 : array[0..size32-1] of TDirEntry = (
( _Tag: $00FE; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {0 NewSubFile: Image with full solution (0) }
( _Tag: $0100; _Type: $0003; _Count: $00000001; _Value: $00000000 ), {1 ImageWidth: Value will be set later }
( _Tag: $0101; _Type: $0003; _Count: $00000001; _Value: $00000000 ), {2 ImageLength: Value will be set later }
( _Tag: $0102; _Type: $0003; _Count: $00000001; _Value: $00000020 ), {3 BitsPerSample $20=32 ,no address }
( _Tag: $0103; _Type: $0003; _Count: $00000001; _Value: $00000001 ), {4 Compression: No compression }
( _Tag: $0106; _Type: $0003; _Count: $00000001; _Value: $00000001 ), {5 PhotometricInterpretation[0, 1], 1 = BlackIsZero.}
( _Tag: $010E; _Type: $0002; _Count: $0000000A; _Value: $00000000 ), {6 Image Description. _Count will be updated later }
( _Tag: $0111; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {7 StripOffsets: Ptr to the adress of the image data }
( _Tag: $0115; _Type: $0003; _Count: $00000001; _Value: $00000001 ), {8 SamplesPerPixels: 1 }
( _Tag: $0116; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {9 RowsPerStrip: Value will be set later }
( _Tag: $0117; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {10 StripByteCounts: xs*ys bytes pro strip }
( _Tag: $011A; _Type: $0005; _Count: $00000001; _Value: $00000000 ), {11 X-Resolution: Adresse }
( _Tag: $011B; _Type: $0005; _Count: $00000001; _Value: $00000000 ), {12 Y-Resolution: (Adresse) }
( _Tag: $0128; _Type: $0003; _Count: $00000001; _Value: $00000002 ), {13 Resolution Unit: (2)= Unit ZOLL }
( _Tag: $0131; _Type: $0002; _Count: $0000000A; _Value: $00000000 ), {14 Software: }
( _Tag: $0153; _Type: $0003; _Count: $00000001; _Value: $00000003 )); {15 Sampleformat float=3 }
size48=17;
NoOfDirsRGB48 : array[0..1] of Byte = (size48, $00 ); { Number of tags within the directory }
DirectoryRGB48 : array[0..size48-1] of TDirEntry = (
( _Tag: $00FE; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {0 NewSubFile: Image with full solution (0) }
( _Tag: $0100; _Type: $0003; _Count: $00000001; _Value: $00000000 ), {1 ImageWidth: Value will be set later }
( _Tag: $0101; _Type: $0003; _Count: $00000001; _Value: $00000000 ), {2 ImageLength: Value will be set later }
( _Tag: $0102; _Type: $0003; _Count: $00000003; _Value: $00000000 ), {3 BitsPerSample address will be written later }
( _Tag: $0103; _Type: $0003; _Count: $00000001; _Value: $00000001 ), {4 Compression: No compression }
( _Tag: $0106; _Type: $0003; _Count: $00000001; _Value: $00000002 ), {5 PhotometricInterpretation: 2 = colour }
( _Tag: $010E; _Type: $0002; _Count: $0000000A; _Value: $00000000 ), {6 Image Description._Count will be updated later }
( _Tag: $0111; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {7 StripOffsets: Ptr to the adress of the image data }
( _Tag: $0115; _Type: $0003; _Count: $00000001; _Value: $00000003 ), {8 SamplesPerPixels: 3 }
( _Tag: $0116; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {9 RowsPerStrip: Value will be set later }
( _Tag: $0117; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {10 StripByteCounts: xs*ys bytes pro strip }
( _Tag: $011A; _Type: $0005; _Count: $00000001; _Value: $00000000 ), {11 X-Resolution: Adresse }
( _Tag: $011B; _Type: $0005; _Count: $00000001; _Value: $00000000 ), {12 Y-Resolution: (Adresse) }
( _Tag: $011C; _Type: $0003; _Count: $00000001; _Value: $00000001 ), {13 PlanarConfiguration: Pixel data will be stored continous }
( _Tag: $0128; _Type: $0003; _Count: $00000001; _Value: $00000002 ), {14 Resolution Unit: (2)= Unit ZOLL }
( _Tag: $0131; _Type: $0002; _Count: $0000000A; _Value: $00000000 ), {15 Software }
( _Tag: $0153; _Type: $0003; _Count: $00000001; _Value: $00000001 )); {16 Sampleformat integer=1 }
size96=17;
NoOfDirsRGB96 : array[0..1] of Byte = (size96, $00 ); { Number of tags within the directory }
DirectoryRGB96 : array[0..size96-1] of TDirEntry = (
( _Tag: $00FE; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {0 NewSubFile: Image with full solution (0) }
( _Tag: $0100; _Type: $0003; _Count: $00000001; _Value: $00000000 ), {1 ImageWidth: Value will be set later }
( _Tag: $0101; _Type: $0003; _Count: $00000001; _Value: $00000000 ), {2 ImageLength: Value will be set later }
( _Tag: $0102; _Type: $0003; _Count: $00000003; _Value: $00000000 ), {3 BitsPerSample address will be written later }
( _Tag: $0103; _Type: $0003; _Count: $00000001; _Value: $00000001 ), {4 Compression: No compression }
( _Tag: $0106; _Type: $0003; _Count: $00000001; _Value: $00000002 ), {5 PhotometricInterpretation: 2 = colour }
( _Tag: $010E; _Type: $0002; _Count: $0000000A; _Value: $00000000 ), {6 Image Description._Count will be updated later }
( _Tag: $0111; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {7 StripOffsets: Ptr to the adress of the image data }
( _Tag: $0115; _Type: $0003; _Count: $00000001; _Value: $00000003 ), {8 SamplesPerPixels: 3 }
( _Tag: $0116; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {9 RowsPerStrip: Value will be set later }
( _Tag: $0117; _Type: $0004; _Count: $00000001; _Value: $00000000 ), {10 StripByteCounts: xs*ys bytes pro strip }
( _Tag: $011A; _Type: $0005; _Count: $00000001; _Value: $00000000 ), {11 X-Resolution: Adresse }
( _Tag: $011B; _Type: $0005; _Count: $00000001; _Value: $00000000 ), {12 Y-Resolution: (Adresse) }
( _Tag: $011C; _Type: $0003; _Count: $00000001; _Value: $00000001 ), {13 PlanarConfiguration: Pixel data will be stored continous }
( _Tag: $0128; _Type: $0003; _Count: $00000001; _Value: $00000002 ), {14 Resolution Unit: (2)= Unit ZOLL }
( _Tag: $0131; _Type: $0002; _Count: $0000000A; _Value: $00000000 ), {15 Software }
( _Tag: $0153; _Type: $0003; _Count: $00000001; _Value: $00000003 )); {16 Sampleformat float=3 }
NullString : array[0..3] of Byte = ( $00, $00, $00, $00 );
X_Res_Value : array[0..7] of Byte = ( $6D,$03,$00,$00, $0A,$00,$00,$00 ); { Value for X-Resolution: 87,7 Pixel/Zoll (SONY SCREEN) }
Y_Res_Value : array[0..7] of Byte = ( $6D,$03,$00,$00, $0A,$00,$00,$00 ); { Value for Y-Resolution: 87,7 Pixel/Zoll }
BitsPerSample48 : array[0..2] of Word = ($0010,$0010,$0010 );{8 or 16=$10}
BitsPerSample96 : array[0..2] of Word = ($0020,$0020,$0020 );{8 or 16=$10}
{Not used in ASTAP}
function save_tiff_16(img: image_array; filen2,description:ansistring;flip_H,flip_V:boolean): boolean;{save to 16 bit grascale TIFF file }
var
OffsetXRes : LongInt;
OffsetYRes : LongInt;
OffsetDescrip : Longint;
OffsetSoftware : LongInt;
OffsetStrip : LongInt;
OffsetDir : LongInt;
thefile : tfilestream;
i,j,k,m,width2,height2 : integer;
dum: double;
dummy : word;
begin
result:=false;
filen2:=ChangeFileExt(Filen2,'.tif');
if fileexists(filen2)=true then
if MessageDlg('Existing file ' +filen2+ ' Overwrite?', mtConfirmation, [mbYes, mbNo], 0) <> 6 {mbYes} then
Exit;
width2:=length(img[0,0]); {width}
height2:=length(img[0]); {height}
description:=description+#0;{GIMP is complaining about this #0}
try
thefile:=tfilestream.Create(filen2, fmcreate );
except
thefile.free;
exit;
end;
Directorybw16[1]._Value := LongInt(width2); { Image Width }
Directorybw16[2]._Value := LongInt(height2); { Image Height }
Directorybw16[9]._Value := LongInt(height2); { Image Height }
Directorybw16[10]._Value := LongInt(2*width2*height2);{ Strip Byte Counts }
Directorybw16[06]._count := LongInt(length(description)); { Length Description}
Directorybw16[14]._count := LongInt(length(softwarename)); { Length software}
{ Write TIFF - File for Image with RGB-Values }
{ ------------------------------------------- }
{ Write Header }
OffsetDir:= sizeof(TifHeader)+ sizeof(X_Res_Value)+ sizeof(Y_Res_Value)+ length(description)+ length(SoftwareName);{where is the IFD directory}
move(offsetdir,tifheader[4],4); { Pointer to the first directory.}
thefile.writebuffer ( TifHeader, sizeof(TifHeader));
OffsetXRes := thefile.Position ;
thefile.writebuffer ( X_Res_Value, sizeof(X_Res_Value));
OffsetYRes := thefile.Position ;
thefile.writebuffer ( Y_Res_Value, sizeof(Y_Res_Value));
OffsetDescrip := thefile.Position ;
thefile.writebuffer ( description[1], length(description));
OffsetSoftware := thefile.Position ;
thefile.writebuffer ( SoftwareName[1], length(SoftwareName));
OffsetStrip := OffsetDir +sizeof(NoOfDirsBW16) +sizeof(Directorybw16) + sizeof(NullString);
{ Set Offset - Adresses into Directory }
Directorybw16[ 7]._Value := OffsetStrip; { StripOffset, location of start image data}
Directorybw16[11]._Value := OffsetXRes; { X-Resolution }
Directorybw16[12]._Value := OffsetYRes; { Y-Resolution }
Directorybw16[14]._Value := OffsetSoftware; { Software }
Directorybw16[06]._Value := OffsetDescrip; { Description }
{ Write IFD Directory }
thefile.writebuffer ( NoOfDirsBW16, sizeof(NoOfDirsBW16));{number of directory entries}
thefile.writebuffer ( Directorybw16, sizeof(Directorybw16));
thefile.writebuffer ( NullString, sizeof(NullString));
{ Write Image Data }
for i:=0 to height2-1 do
begin
if flip_V=false then k:=height2-1-i else k:=i;{reverse fits down to counting}
for j:=0 to width2-1 do
begin
if flip_H=true then m:=width2-1-j else m:=j;
dum:=img[0,k,m]; if dum>$FFFF then dum:=$FFFF;if dum<0 then dum:=$0;dummy:=round(dum);
tiffbuffer[m+m] :=lo(dummy);
tiffbuffer[m+m+1]:=hi(dummy);
end;
thefile.writebuffer( tiffbuffer,width2*2{size 2x8}) ;{works only for byte arrays}
end;
thefile.free;
result:=true;
end;
function save_tiff_32(img: image_array; filen2,description:ansistring;flip_H,flip_V:boolean): boolean;{save to 32 bit float gray scale TIFF file }
var
OffsetXRes : LongInt;
OffsetYRes : LongInt;
OffsetSoftware : LongInt;
OffsetDescrip : LongInt;
OffsetStrip : LongInt;
OffsetDir : LongInt;
thefile : tfilestream;
i,j,k,m,width2,height2,test : integer;
begin
result:=false;
filen2:=ChangeFileExt(Filen2,'.tif');
if fileexists(filen2)=true then
if MessageDlg('Existing file ' +filen2+ ' Overwrite?', mtConfirmation, [mbYes, mbNo], 0) <> 6 {mbYes} then
Exit;
//colours2:=length(img);{nr colours}
width2:=length(img[0,0]);{width}
height2:=length(img[0]);{height}
description:=description+#0;{GIMP is complaining about this #0}
try
thefile:=tfilestream.Create(filen2, fmcreate );
except
thefile.free;
exit;
end;
Directorybw32[1]._Value := LongInt(width2); { Image Width }
Directorybw32[2]._Value := LongInt(Height2); { Image Height }
Directorybw32[9]._Value := LongInt(Height2); { Image Height }
Directorybw32[10]._Value := LongInt(4*width2*Height2);{ Strip Byte Counts }
Directorybw32[06]._count := LongInt(length(description)); { Length Description}
Directorybw32[14]._count := LongInt(length(softwarename)); { Length software}
{ Write TIFF - }
{ ------------------------------------------- }
{ Write Header }
OffsetDir:= sizeof(TifHeader)+ sizeof(X_Res_Value)+ sizeof(Y_Res_Value)+ length(description)+ length(SoftwareName);{where is the IFD directory}
move(offsetdir,tifheader[4],4); { Pointer to the first directory.}
thefile.writebuffer ( TifHeader, sizeof(TifHeader));
OffsetXRes := thefile.Position ;
thefile.writebuffer ( X_Res_Value, sizeof(X_Res_Value));
OffsetYRes := thefile.Position ;
thefile.writebuffer ( Y_Res_Value, sizeof(Y_Res_Value));
OffsetDescrip := thefile.Position ;
thefile.writebuffer ( description[1], length(description));
OffsetSoftware := thefile.Position ;
thefile.writebuffer ( SoftwareName[1], length(SoftwareName));
OffsetStrip := OffsetDir +sizeof(NoOfDirsBW32) +sizeof(Directorybw32) + sizeof(NullString);
{ Set Offset - Adresses into Directory }
Directorybw32[ 7]._Value := OffsetStrip; { StripOffset, location of start image data}
Directorybw32[11]._Value := OffsetXRes; { X-Resolution }
Directorybw32[12]._Value := OffsetYRes; { Y-Resolution }
Directorybw32[14]._Value := OffsetSoftware; { Software }
Directorybw32[06]._Value := OffsetDescrip; { Description }
{ Write IFD Directory }
thefile.writebuffer ( NoOfDirsBW32, sizeof(NoOfDirsBW32));{number of directory entries}
thefile.writebuffer ( Directorybw32, sizeof(Directorybw32));
thefile.writebuffer ( NullString, sizeof(NullString));
{ Write Image Data }
for i:=0 to Height2-1 do
begin
if flip_V=false then k:=height2-1-i else k:=i;{reverse fits down to counting}
for j:=0 to width2-1 do
begin
if flip_H=true then m:=width2-1-j else m:=j;
tiffbuffer32[m]:=img[0,k,m]/65535;{range 0..1}
end;
thefile.writebuffer(tiffbuffer,width2*4{size 2x8}) ;{works only for byte arrays}
end;
thefile.free;
result:=true;
end;
{Not used in ASTAP}
function save_tiff_48(img: image_array; filen2,description:ansistring;flip_H,flip_V:boolean): boolean;{save to 48=3x16 color TIFF file}
var
OffsetXRes : LongInt;
OffsetYRes : LongInt;
OffsetDescrip : Longint;
OffsetSoftware : LongInt;
OffsetStrip : LongInt;
OffsetDir : LongInt;
OffsetBitsPerSample : LongInt;
thefile : tfilestream;
i,j,k,m,width2,height2: integer;
dum: double;
dummy : word;
begin
result:=false;
filen2:=ChangeFileExt(Filen2,'.tif');
if fileexists(filen2)=true then
if MessageDlg('Existing file ' +filen2+ ' Overwrite?', mtConfirmation, [mbYes, mbNo], 0) <> 6 {mbYes} then
Exit;
try
thefile:=tfilestream.Create(filen2, fmcreate );
except
thefile.free;
exit;
end;
width2:=length(img[0,0]);{width}
height2:=length(img[0]);{height}
description:=description+#0;{GIMP is complaining about this}
Directoryrgb48[1]._Value := LongInt(width2); { Image Width }
Directoryrgb48[2]._Value := LongInt(height2); { Image Height }
Directoryrgb48[9]._Value := LongInt(height2); { Image Height }
Directoryrgb48[10]._Value:= LongInt(2*3*width2*height2); { Strip Byte Counts }
Directoryrgb48[06]._count:= LongInt(length(description)); { Length Description}
Directoryrgb48[15]._count:= LongInt(length(softwarename)); { Length software}
{ Write TIFF - File for Image with RGB-Values }
{ ------------------------------------------- }
{ Write Header }
OffsetDir:= sizeof(TifHeader)+ sizeof(X_Res_Value)+ sizeof(Y_Res_Value)+ sizeof(BitsPerSample48)+ length(description)+ length(SoftwareName);{where is the IFD directory}
move(offsetdir,tifheader[4],4); { Pointer to the first directory.}
thefile.writebuffer ( TifHeader, sizeof(TifHeader));
OffsetXRes := thefile.Position ;
thefile.writebuffer ( X_Res_Value, sizeof(X_Res_Value));
OffsetYRes := thefile.Position ;
thefile.writebuffer ( Y_Res_Value, sizeof(Y_Res_Value));
OffsetBitsPerSample := Thefile.Position ; {where is sample located}
Thefile.writebuffer ( BitsPerSample48, sizeof(BitsPerSample48));
OffsetDescrip := thefile.Position ;
thefile.writebuffer ( description[1], length(description));
OffsetSoftware := thefile.Position ;
thefile.writebuffer ( SoftwareName[1], length(SoftwareName));
OffsetStrip := OffsetDir +sizeof(NoOfDirsRGB48) +sizeof(DirectoryRGB48) + sizeof(NullString);
{ Set Offset - Adresses into Directory }
DirectoryRGB48[ 3]._Value := OffsetBitsPerSample; { BitsPerSample location containing 1000 1000 1000 (16,16,16)}
Directoryrgb48[ 7]._Value := OffsetStrip; { StripOffset, location of start image data}
Directoryrgb48[11]._Value := OffsetXRes; { X-Resolution }
Directoryrgb48[12]._Value := OffsetYRes; { Y-Resolution }
Directoryrgb48[15]._Value := OffsetSoftware; { Software }
Directoryrgb48[06]._Value := OffsetDescrip; { Description }
{ Write Directory }
thefile.writebuffer ( NoOfDirsRGB48, sizeof(NoOfDirsRGB48));{number of directory entries}
thefile.writebuffer ( Directoryrgb48, sizeof(Directoryrgb48));
thefile.writebuffer ( NullString, sizeof(NullString));
{ Write Image Data }
for i:=0 to height2-1 do
begin
if flip_V=false then k:=height2-1-i else k:=i;{reverse fits down to counting}
for j:=0 to width2-1 do
begin
if flip_H=true then m:=width2-1-j else m:=j;
dum:=img[0,k,m]; if dum>$FFFF then dum:=$FFFF;if dum<0 then dum:=$0;dummy:=round(dum);
tiffbuffer[m*6 ] :=lo(dummy);
tiffbuffer[m*6+1] :=hi(dummy);
dum:=img[1,k,m]; if dum>$FFFF then dum:=$FFFF;if dum<0 then dum:=$0;dummy:=round(dum);
tiffbuffer[m*6+2] :=lo(dummy);
tiffbuffer[m*6+3] :=hi(dummy);
dum:=img[2,k,m]; if dum>$FFFF then dum:=$FFFF;if dum<0 then dum:=$0;dummy:=round(dum);
tiffbuffer[m*6+4] :=lo(dummy);
tiffbuffer[m*6+5] :=hi(dummy);
end;
thefile.writebuffer(tiffbuffer,width2*6{size 2x6}) ;{works only for byte arrays}
end;
{ Set Offset - Adresses into Directory }
DirectoryRGB48[ 3]._Value := OffsetBitsPerSample; { BitsPerSample location containing 1000 1000 1000 (16,16,16)}
Directoryrgb48[ 7]._Value := OffsetStrip; { StripOffset, location of start image data}
Directoryrgb48[11]._Value := OffsetXRes; { X-Resolution }
Directoryrgb48[12]._Value := OffsetYRes; { Y-Resolution }
Directoryrgb48[15]._Value := OffsetSoftware; { Software }
Directoryrgb48[06]._Value := OffsetDescrip; { Description }
{ Write Directory }
OffsetDir := thefile.Position ;{where is the IFD directory}
thefile.writebuffer ( NoOfDirsRGB48, sizeof(NoOfDirsRGB48));{number of directory entries}
thefile.writebuffer ( Directoryrgb48, sizeof(Directoryrgb48));
thefile.writebuffer ( NullString, sizeof(NullString));
thefile.free;
result:=true;
end;
function save_tiff_96(img: image_array; filen2,description:ansistring;flip_H,flip_V:boolean): boolean;{save to 96=3x32 color TIFF file }
var
OffsetXRes : LongInt;
OffsetYRes : LongInt;
OffsetDescrip : Longint;
OffsetSoftware : LongInt;
OffsetStrip : LongInt;
OffsetDir : LongInt;
OffsetBitsPerSample : LongInt;
var
thefile : tfilestream;
i,j,k,m,width2,height2,len : integer;
buf32: single;
buffer : array[0..3] of byte absolute buf32;
begin
result:=false;
filen2:=ChangeFileExt(Filen2,'.tif');
if fileexists(filen2)=true then
if MessageDlg('Existing file ' +filen2+ ' Overwrite?', mtConfirmation, [mbYes, mbNo], 0) <> 6 {mbYes} then
Exit;
try
thefile:=tfilestream.Create(filen2, fmcreate );
except
thefile.free;
exit;
end;
//colours2:=length(img);{nr colours}
width2:=length(img[0,0]);{width}
height2:=length(img[0]);{height}
description:=description+#0;{GIMP is complaining about this}
Directoryrgb96[1]._Value := LongInt(width2); { Image Width }
Directoryrgb96[2]._Value := LongInt(Height2); { Image Height }
Directoryrgb96[9]._Value := LongInt(Height2); { Image Height }
Directoryrgb96[10]._Value:= LongInt(4*3*width2*Height2); { Strip Byte Counts }
Directoryrgb96[06]._count:= LongInt(length(description)); { Length Description}
Directoryrgb96[15]._count:= LongInt(length(softwarename)); { Length software}
{ Write TIFF - File for Image with RGB-Values }
{ ------------------------------------------- }
{ Write Header }
OffsetDir:= sizeof(TifHeader)+ sizeof(X_Res_Value)+ sizeof(Y_Res_Value)+ sizeof(BitsPerSample96)+ length(description)+ length(SoftwareName); {where is the IFD directory}
move(offsetdir,tifheader[4],4); { Pointer to the first directory.}
thefile.writebuffer ( TifHeader, sizeof(TifHeader));
OffsetXRes := thefile.Position ;
thefile.writebuffer ( X_Res_Value, sizeof(X_Res_Value));
OffsetYRes := thefile.Position ;
thefile.writebuffer ( Y_Res_Value, sizeof(Y_Res_Value));
OffsetBitsPerSample := Thefile.Position ; {where is sample located}
Thefile.writebuffer ( BitsPerSample96, sizeof(BitsPerSample96));
OffsetDescrip := thefile.Position ;
thefile.writebuffer ( description[1], length(description));
OffsetSoftware := thefile.Position ;
thefile.writebuffer ( SoftwareName[1], length(SoftwareName));
OffsetStrip := OffsetDir +sizeof(NoOfDirsRGB96) +sizeof(DirectoryRGB96) + sizeof(NullString);
{ Set Offset - Adresses into Directory }
DirectoryRGB96[ 3]._Value := OffsetBitsPerSample; { BitsPerSample location containing 1000 1000 1000 (16,16,16)}
Directoryrgb96[ 7]._Value := OffsetStrip; { StripOffset, location of start image data}
Directoryrgb96[11]._Value := OffsetXRes; { X-Resolution }
Directoryrgb96[12]._Value := OffsetYRes; { Y-Resolution }
Directoryrgb96[15]._Value := OffsetSoftware; { Software }
Directoryrgb96[06]._Value := OffsetDescrip; { Description }
{ Write Directory }
thefile.writebuffer ( NoOfDirsRGB96, sizeof(NoOfDirsRGB96));{number of directory entries}
thefile.writebuffer ( Directoryrgb96, sizeof(Directoryrgb96));
thefile.writebuffer ( NullString, sizeof(NullString));
{ Write Image Data }
for i:=0 to Height2-1 do
begin
if flip_V=false then k:=height2-1-i else k:=i;{reverse fits down to counting}
for j:=0 to width2-1 do
begin
if flip_H=true then m:=width2-1-j else m:=j;
buf32:=img[0,k,m]/65535;{range 0..1, buf32 has absolute link to buffer}
tiffbuffer[m*12 ] :=buffer[0];
tiffbuffer[m*12+1] :=buffer[1];
tiffbuffer[m*12+2] :=buffer[2];
tiffbuffer[m*12+3] :=buffer[3];
buf32:=img[1,k,m]/65535;{range 0..1, buf32 has absolute link to buffer}
tiffbuffer[m*12+4] :=buffer[0];
tiffbuffer[m*12+5] :=buffer[1];
tiffbuffer[m*12+6] :=buffer[2];
tiffbuffer[m*12+7] :=buffer[3];
buf32:=img[2,k,m]/65535;{range 0..1, buf32 has absolute link to buffer}
tiffbuffer[m*12+8] :=buffer[0];
tiffbuffer[m*12+9] :=buffer[1];
tiffbuffer[m*12+10] :=buffer[2];
tiffbuffer[m*12+11] :=buffer[3];
end;
thefile.writebuffer(tiffbuffer,width2*12) ;{works only for byte arrays}
end;
thefile.free;
result:=true;
end;
end.