Recent changes to File types

File types modified by Dirk Krause

Dirk Krause — Wed, 25 Mar 2020 22:14:43 -0000

--- v10
+++ v11
@@ -79,7 +79,7 @@
 
 ## WXD

-WXD files (\*.wxd) are vector graphics files produced by the [dktools:wiki:wxdkdraw] program.
+WXD files (\*.wxd) are vector graphics files produced by the [wxdkdraw](dktools:wiki:wxdkdraw) program.
 A \*.wxd file can reference (import) bitmap graphics files.

File types modified by Dirk Krause

Dirk Krause — Wed, 25 Mar 2020 22:12:55 -0000

--- v9
+++ v10
@@ -79,7 +79,7 @@
 
 ## WXD

-WXD files (\*.wxd) are vector graphics files produced by the wxdkdraw program.
+WXD files (\*.wxd) are vector graphics files produced by the [dktools:wiki:wxdkdraw] program.
 A \*.wxd file can reference (import) bitmap graphics files.

File types modified by Dirk Krause

Dirk Krause — Wed, 25 Mar 2020 22:02:07 -0000

--- v8
+++ v9
@@ -1,11 +1,21 @@
+
+
+
+
+
+
+↑Home
+
+---
+
 [TOC]

-#  File types
+---

 
-## Basics
-
-###    Bitmap graphics
+#  Basics
+
+## Bitmap graphics

 For bitmap graphics an image is divided into (normally) square sections. Each of these pixels can be described by a set of numeric values.

@@ -42,7 +52,7 @@
 Some bitmap graphics file formats (i.e. GIF) use a color palette (color table). This table contains the color values for i.e. 256 colors. Pixel data consists of one number per pixel, the index in the color table.

 
-###    Vector graphics
+## Vector graphics

 A vector graphics consists of drawing instructions like "draw a 1mm wide line from starting point P_s(x_s,y_s) to end point P_e(x_e,y_e) as solid line in black color."

@@ -51,7 +61,7 @@

 ---

-## File type rules
+#  File type rules
 
 Use vector graphics whenever possible.
 
@@ -64,22 +74,22 @@

 ---

-## Vector graphics file formats
+#  Vector graphics file formats

 
-###    WXD
+## WXD

 WXD files (\*.wxd) are vector graphics files produced by the wxdkdraw program.
 A \*.wxd file can reference (import) bitmap graphics files.

 
-###    Fig
+## Fig

 Fig files (\*.fig) are vector graphics files produced by XFig, jFig, or WinFIG.
 A \*.fig file can reference (import) bitmap graphics files.

 
-###    GnuPlot
+## GnuPlot

 Gnuplot is a program for mathematical plotting. Input files for Gnuplot are text files containing instructions to set up the plot.

@@ -94,7 +104,7 @@
 Terminal type and output file name are passed to gnuplot using the -e option by gxhconvert, depending on the output file type and other options you provided to gxhconvert.

 
-###    SVG
+## SVG

 SVG (\*.svg, \*.svgz, \*.svg.gz) is a vector graphics file format, developed by Adobe, Inc.
 SVG files can reference bitmap image files.
@@ -114,13 +124,13 @@
 To use Inkscape+LaTeX SVG files with gxhconvert, make sure the file names end on "-il.svg", "-il.svgz", or "-il.svg.gz".

 
-###    LaTeX document
+## LaTeX document

 A LaTeX document (\*.tex) is a complete \*.tex file one can process using latex or pdflatex. It can contain one or multiple LaTeX images.
 A LaTeX document for one image may have one or two supporting files.

 
-###    LaTeX image
+## LaTeX image

 A LaTeX image (\*.tex) is a file containing LaTeX/TeX instructions for an image. Typically it loads a supporting PDF or EPS file containing the non-text graphics elements and typesets text labels on top of it.

@@ -148,14 +158,14 @@
 

 
-###    PDF
+## PDF

 PDF (\*.pdf) is a graphics format developed by Adobe, Inc.
 It can contain both vector and bitmap graphics elements.
 The intended purpose is electronic document exchange.

 
-###    EPS/PS
+## EPS/PS

 PS (\*.ps, \*.eps) is a graphics format developed by Adobe, Inc.
 It can contain both vector and bitmap graphics elements.
@@ -164,15 +174,15 @@

 ---

-## Bitmap graphics file formats
+#  Bitmap graphics file formats

 
-###    PNG
+## PNG

 PNG (\*.png) is a lossless bitmap image graphics format.

 
-###    JPEG
+## JPEG

 JPEG (\*.jpg, \*.jpeg) is a lossy bitmap image graphics format using DCT-based compression. You should use it for photograms only.

@@ -190,14 +200,14 @@
 command. The identify program is in the ImageMagick package.

 
-###    TIFF
+## TIFF

 TIFF (\*.tif, \*.tiff) is a bitmap image graphics format allowing multiple frames (images) in one file. Different compression mechanisms (both lossless and lossy) are available.
 The TIFF V6.0 baseline standard lists a number of TIFF tags but some software vendors use their own non-standard TIFF tags when writing TIFF files.  When processing TIFF files you should not be suprised when reading "unsupported TIFF tag" messages.
 If you have a choice I recommend to avoid the TIFF file format, use PNG or JPEG instead.

 
-###    ICO
+## ICO

 An icon file contains multiple bitmaps of different size and color depth. We have to prepare all these bitmap/pixmaps.
 If you ask which sizes and colors are required in an icon for a Windows application, opinions differ:
@@ -228,7 +238,7 @@
 Icon files can have an image mask (each pixel is either fully opaque or fully transparent). When converting vector graphics formats (Fig, Gnuplot, PDF, PS/EPS, SVG) or images containing an alpha channel (PNG, TIFF) to ICO the image is mixed against a white background.  Optionally we can create an image mask from alpha channel transparency data or from information about unused regions.

 
-###    XPM
+## XPM

 XPM is a bitmap image file type saving the image data as C source code (array of C strings).  The wxWidgets libraries use XPM images for toolbar button images (width: 16 pixels, height: 15 pixels) and for application icons on non-Windows systems (width and height: 32 pixels).

@@ -236,3 +246,13 @@
 The gxhconvert script uses xpm_filename where filename is the input file name without suffix with some corrections applied (minus and dots are replaced by underscores).

 XPM files can have an image mask (each pixel is either fully opaque or fully transparent). When converting vector graphics formats (Fig, Gnuplot, PDF, PS/EPS, SVG) or images containing an alpha channel (PNG, TIFF) to XPM the image is mixed against a white background.  Optionally we can create an image mask from alpha channel transparency data or from information about unused regions.
+
+---
+
+
+
+
+
+
+
+↑Home

File types modified by Dirk Krause

Dirk Krause — Wed, 25 Mar 2020 21:58:45 -0000

--- v7
+++ v8
@@ -65,6 +65,12 @@
 ---

 ## Vector graphics file formats
+
+
+###    WXD
+
+WXD files (\*.wxd) are vector graphics files produced by the wxdkdraw program.
+A \*.wxd file can reference (import) bitmap graphics files.

 
 ###    Fig

File types modified by Dirk Krause

Dirk Krause — Tue, 12 Jun 2018 22:24:24 -0000

--- v6
+++ v7
@@ -99,7 +99,7 @@
 
 Inkscape SVG
is the file format used by the Inkscape program (a vector drawing application). Tags from the inkscape:... and sodipodi:... XML namespaces are used which are probably not understood by SVG viewers and renderers.
 
-Inkscape+LaTeX SVG
When exporting from Inkscape, we can optionally create a \*.pdf/.pdf_tex or \*.eps/\*.eps_tex combination (a LaTeX image) where text labels are passed to LaTeX to enable formulas and mathematical typesetting, i.e. "\\(c^2=a^2+b^2\\)".
+
Inkscape+LaTeX SVG
When exporting from Inkscape, we can optionally create a *.pdf/*.pdf_tex or *.eps/*.eps_tex combination (a LaTeX image) where text labels are passed to LaTeX to enable formulas and mathematical typesetting, i.e. "\(c^2=a^2+b^2\)".
 If an SVG file contains LaTeX texts, we can not use it without LaTeX.

File types modified by Dirk Krause

Dirk Krause — Tue, 12 Jun 2018 22:23:16 -0000

--- v5
+++ v6
@@ -57,8 +57,7 @@
 
 When using bitmap graphics, prefer lossless file types.
 
-Use lossy file types only for dedicated purposes (i.e. JPEG
-for photograms).
+
Use lossy file types only for dedicated purposes (i.e. JPEG for photograms).

File types modified by Dirk Krause

Dirk Krause — Tue, 12 Jun 2018 22:22:50 -0000

--- v4
+++ v5
@@ -96,11 +96,11 @@
 For conversions we have to consider three flavors of SVG:

 
-**Plain SVG**
contains just those tags mentioned in the file format standard. Most SVG viewers and renderers handle plain SVG.
-
-**Inkscape SVG**
is the file format used by the Inkscape program (a vector drawing application). Tags from the inkscape:... and sodipodi:... XML namespaces are used which are probably not understood by SVG viewers and renderers.
-
-**Inkscape+LaTeX SVG**
When exporting from Inkscape, we can optionally create a \*.pdf/.pdf_tex or \*.eps/\*.eps_tex combination (a LaTeX image) where text labels are passed to LaTeX to enable formulas and mathematical typesetting, i.e. "\\(c^2=a^2+b^2\\)".
+
Plain SVG
contains just those tags mentioned in the file format standard. Most SVG viewers and renderers handle plain SVG.
+
+Inkscape SVG
is the file format used by the Inkscape program (a vector drawing application). Tags from the inkscape:... and sodipodi:... XML namespaces are used which are probably not understood by SVG viewers and renderers.
+
+Inkscape+LaTeX SVG
When exporting from Inkscape, we can optionally create a \*.pdf/.pdf_tex or \*.eps/\*.eps_tex combination (a LaTeX image) where text labels are passed to LaTeX to enable formulas and mathematical typesetting, i.e. "\\(c^2=a^2+b^2\\)".
 If an SVG file contains LaTeX texts, we can not use it without LaTeX.
 
 
@@ -129,16 +129,16 @@
 Typical examples are:

 
-\*.tex or \*.pgf files containing PGF instructions,
-
-\*.tex/\*.pdf and \*.tex/\*.eps combinations produced by fig2lat from
+
*.tex or *.pgf files containing PGF instructions,
+
+*.tex/*.pdf and *.tex/*.eps combinations produced by fig2lat from
 \*.fig files,
 
-\*.pdftex_t/\*.pdftex and \*.epstex_t/\*.epstex combinations produced by
-fig2dev from \*.fig files,
-
-\*.pdf_tex/\*.pdf and \*.eps_tex/\*.eps combinations produced by inkscape
-when exporting \*.svg files.
+
*.pdftex_t/*.pdftex and *.epstex_t/*.epstex combinations produced by
+fig2dev from *.fig files,
+
+*.pdf_tex/*.pdf and *.eps_tex/*.eps combinations produced by inkscape
+when exporting *.svg files.

File types modified by Dirk Krause

Dirk Krause — Tue, 12 Jun 2018 22:12:45 -0000

--- v3
+++ v4
@@ -2,11 +2,12 @@

 #  File types

+
 ## Basics

 ###    Bitmap graphics

-For bitmap graphics an image is divided into (normally) square sections. Each of these pixels can be described by a set of numeric values.
+For bitmap graphics an image is divided into (normally) square sections. Each of these pixels can be described by a set of numeric values.

 The number of numeric values for each pixel and the interpretation depends on the color space. Some example color spaces are:

@@ -40,9 +41,10 @@

 Some bitmap graphics file formats (i.e. GIF) use a color palette (color table). This table contains the color values for i.e. 256 colors. Pixel data consists of one number per pixel, the index in the color table.

+
 ###    Vector graphics

-A vector graphics consists of drawing instructions like "draw a 1mm wide line from starting point P_s(x_s,y_s) to end point P_e(x_e,y_e) as solid line in black color."
+A vector graphics consists of drawing instructions like "draw a 1mm wide line from starting point P_s(x_s,y_s) to end point P_e(x_e,y_e) as solid line in black color."

 On screens and printers vector graphics are converted into bitmap graphics for the device. The information about original paths, line widths and other graphics attributes allows optimized rendering on different targets depending on the target device's resolution and the zoom factor.
 Vector graphics are scalable.
@@ -65,15 +67,16 @@

 ## Vector graphics file formats

+
 ###    Fig

-Fig files (\*.fig) are vector graphics files produced by XFig, jFig, or WinFIG.
+Fig files (\*.fig) are vector graphics files produced by XFig, jFig, or WinFIG.
 A \*.fig file can reference (import) bitmap graphics files.

-
+
 ###    GnuPlot

-Gnuplot is a program for mathematical plotting. Input files for Gnuplot are text files containing instructions to set up the plot.
+Gnuplot is a program for mathematical plotting. Input files for Gnuplot are text files containing instructions to set up the plot.

 If you want to use a \*.gp file with the gxhconvert script, make sure the \*.gp file does not contain

@@ -85,19 +88,19 @@
 lines.
 Terminal type and output file name are passed to gnuplot using the -e option by gxhconvert, depending on the output file type and other options you provided to gxhconvert.

-
+
 ###    SVG

-SVG (\*.svg, \*.svgz, \*.svg.gz) is a vector graphics file format, developed by Adobe, Inc.
+SVG (\*.svg, \*.svgz, \*.svg.gz) is a vector graphics file format, developed by Adobe, Inc.
 SVG files can reference bitmap image files.
 For conversions we have to consider three flavors of SVG:

 
-**Plain SVG**
 contains just those tags mentioned in the file format standard. Most SVG viewers and renderers handle plain SVG.
+
**Plain SVG**
contains just those tags mentioned in the file format standard. Most SVG viewers and renderers handle plain SVG.
 
 **Inkscape SVG**
is the file format used by the Inkscape program (a vector drawing application). Tags from the inkscape:... and sodipodi:... XML namespaces are used which are probably not understood by SVG viewers and renderers.
 
-**Inkscape+LaTeX SVG**
 When exporting from Inkscape, we can optionally create a \*.pdf/.pdf_tex or \*.eps/\*.eps_tex combination (a LaTeX image) where text labels are passed to LaTeX to enable formulas and mathematical typesetting, i.e. "\\(c^2=a^2+b^2\\)".
+
**Inkscape+LaTeX SVG**
When exporting from Inkscape, we can optionally create a \*.pdf/.pdf_tex or \*.eps/\*.eps_tex combination (a LaTeX image) where text labels are passed to LaTeX to enable formulas and mathematical typesetting, i.e. "\\(c^2=a^2+b^2\\)".
 If an SVG file contains LaTeX texts, we can not use it without LaTeX.
 
 
@@ -105,16 +108,16 @@
 For conversion paths we have to distinguish between Inkscape+LaTeX SVG files and SVG without LaTeX.
 To use Inkscape+LaTeX SVG files with gxhconvert, make sure the file names end on "-il.svg", "-il.svgz", or "-il.svg.gz".

-
+
 ###    LaTeX document

-A LaTeX document (\*.tex) is a complete \*.tex file one can process using latex or pdflatex. It can contain one or multiple LaTeX images.
+A LaTeX document (\*.tex) is a complete \*.tex file one can process using latex or pdflatex. It can contain one or multiple LaTeX images.
 A LaTeX document for one image may have one or two supporting files.

-
+
 ###    LaTeX image

-A LaTeX image (\*.tex) is a file containing LaTeX/TeX instructions for an image. Typically it loads a supporting PDF or EPS file containing the non-text graphics elements and typesets text labels on top of it.
+A LaTeX image (\*.tex) is a file containing LaTeX/TeX instructions for an image. Typically it loads a supporting PDF or EPS file containing the non-text graphics elements and typesets text labels on top of it.

 The

@@ -139,15 +142,17 @@
 
 

+
 ###    PDF

-PDF (\*.pdf) is a graphics format developed by Adobe, Inc.
+PDF (\*.pdf) is a graphics format developed by Adobe, Inc.
 It can contain both vector and bitmap graphics elements.
 The intended purpose is electronic document exchange.

+
 ###    EPS/PS

-PS (\*.ps, \*.eps) is a graphics format developed by Adobe, Inc.
+PS (\*.ps, \*.eps) is a graphics format developed by Adobe, Inc.
 It can contain both vector and bitmap graphics elements.
 You can send a PS file directly to a PostScript printer, it is a printer language.
 EPS is a subset of PS, intended to include images into print jobs.
@@ -156,14 +161,15 @@

 ## Bitmap graphics file formats

+
 ###    PNG

-PNG (\*.png) is a lossless bitmap image graphics format.
-
-
+PNG (\*.png) is a lossless bitmap image graphics format.
+
+
 ###    JPEG

-JPEG (\*.jpg, \*.jpeg) is a lossy bitmap image graphics format using DCT-based compression. You should use it for photograms only.
+JPEG (\*.jpg, \*.jpeg) is a lossy bitmap image graphics format using DCT-based compression. You should use it for photograms only.

 A quality parameter in the range 0%...100% can be used to control the image quality. Normaly you will use values in the range 80%...95%. Values below 25% or above 98% are not recommended.
 For Ghostscript the quality parameter is not in percent, the range 0.0 ... 1.0 is used instead.
@@ -178,17 +184,17 @@

 command. The identify program is in the ImageMagick package.

-
+
 ###    TIFF

-TIFF (\*.tif, \*.tiff) is a bitmap image graphics format allowing multiple frames (images) in one file. Different compression mechanisms (both lossless and lossy) are available.
+TIFF (\*.tif, \*.tiff) is a bitmap image graphics format allowing multiple frames (images) in one file. Different compression mechanisms (both lossless and lossy) are available.
 The TIFF V6.0 baseline standard lists a number of TIFF tags but some software vendors use their own non-standard TIFF tags when writing TIFF files.  When processing TIFF files you should not be suprised when reading "unsupported TIFF tag" messages.
 If you have a choice I recommend to avoid the TIFF file format, use PNG or JPEG instead.

-
+
 ###    ICO

-An icon file contains multiple bitmaps of different size and color depth. We have to prepare all these bitmap/pixmaps.
+An icon file contains multiple bitmaps of different size and color depth. We have to prepare all these bitmap/pixmaps.
 If you ask which sizes and colors are required in an icon for a Windows application, opinions differ:

 
@@ -216,10 +222,10 @@

 Icon files can have an image mask (each pixel is either fully opaque or fully transparent). When converting vector graphics formats (Fig, Gnuplot, PDF, PS/EPS, SVG) or images containing an alpha channel (PNG, TIFF) to ICO the image is mixed against a white background.  Optionally we can create an image mask from alpha channel transparency data or from information about unused regions.

-
+
 ###    XPM

-XPM is a bitmap image file type saving the image data as C source code (array of C strings).  The wxWidgets libraries use XPM images for toolbar button images (width: 16 pixels, height: 15 pixels) and for application icons on non-Windows systems (width and height: 32 pixels).
+XPM is a bitmap image file type saving the image data as C source code (array of C strings).  The wxWidgets libraries use XPM images for toolbar button images (width: 16 pixels, height: 15 pixels) and for application icons on non-Windows systems (width and height: 32 pixels).

 When producing an XPM file using ppmtoxpm we have to specify a "-name name" option. The name must be a valid identifier in the C programming language.
 The gxhconvert script uses xpm_filename where filename is the input file name without suffix with some corrections applied (minus and dots are replaced by underscores).

File types modified by Dirk Krause

Dirk Krause — Tue, 12 Jun 2018 22:05:31 -0000

--- v2
+++ v3
@@ -1,3 +1,5 @@
+[TOC]
+
 #  File types

 ## Basics

File types modified by Dirk Krause

Dirk Krause — Tue, 12 Jun 2018 22:05:06 -0000

--- v1
+++ v2
@@ -4,7 +4,7 @@

 ###    Bitmap graphics

-Forbitmap graphics an image is divided into (normally) square sections. Each of these pixels can be described by a set of numeric values.
+For bitmap graphics an image is divided into (normally) square sections. Each of these pixels can be described by a set of numeric values.

 The number of numeric values for each pixel and the interpretation depends on the color space. Some example color spaces are: