[Plplot-cvs] SF.net SVN: plplot:[10234] trunk/examples/python

[<ai...@us...>]

Revision: 10234
          http://plplot.svn.sourceforge.net/plplot/?rev=10234&view=rev
Author:   airwin
Date:     2009-08-12 21:24:48 +0000 (Wed, 12 Aug 2009)

Log Message:
-----------
Add two additional python scripts for simple device rendering tests to
test_circle.py and describe all three such scripts in a README file.

Modified Paths:
--------------
    trunk/examples/python/CMakeLists.txt

Added Paths:
-----------
    trunk/examples/python/README.rendering_tests
    trunk/examples/python/test_superscript_subscript.py
    trunk/examples/python/testh.py

Modified: trunk/examples/python/CMakeLists.txt
===================================================================
--- trunk/examples/python/CMakeLists.txt	2009-08-12 20:56:03 UTC (rev 10233)
+++ trunk/examples/python/CMakeLists.txt	2009-08-12 21:24:48 UTC (rev 10234)
@@ -71,6 +71,8 @@
   xw31.py
   plplot_logo.py
   test_circle.py
+  testh.py
+  test_superscript_subscript.py
   )
 
 if(ENABLE_tk)
@@ -136,6 +138,7 @@
   python_DATA
   ${python_DATA}
   README.pythondemos
+  README.rendering_tests
   README.logo
   svg_760x120_gradient.patch
   )

Added: trunk/examples/python/README.rendering_tests
===================================================================
--- trunk/examples/python/README.rendering_tests	                        (rev 0)
+++ trunk/examples/python/README.rendering_tests	2009-08-12 21:24:48 UTC (rev 10234)
@@ -0,0 +1,68 @@
+We have implemented a number of simple python standalone scripts to test for
+rendering issues with our PLplot device drivers.
+
+N.B. these tests should not be propagated to other languages.  python is
+ideal for rapid development and evaluation.  Given this, it is expected
+these tests will change substantially over time and more tests will be
+added. Thus, propagating those expected changes to other languages is
+largely pointless.
+
+N.B. the SVG test results for "firefox", "konqueror", and "display" reported
+below at this time of writing (2009-08-12) are for Debian Lenny where
+firefox is iceweasel Version 2.0.0.14-2, konqueror is Version
+4:3.5.9.dfsg.1-6, and by default display (Version 7:6.3.7.9.dfsg2-1~lenny1)
+uses the rsvg2 GNOME library to render svg files. Your SVG viewing results
+will differ for other versions of firefox, konqueror, and display.  They
+will also differ for other SVG-aware applications because SVG viewing and
+rendering within Linux is still a bit problematic, even though Linux is
+probably in better SVG shape than other platforms.
+
+* test_circle.py (only useful for testing unicode-aware devices) renders a
+series of "LARGE CIRCLE" and "BOX DRAWINGS LIGHT DIAGONAL CROSS" unicode
+characters from (very) large sizes to small sizes to check there is no
+vertical drift in the alignment of the characters, and also to check that
+very large versions of characters are rendered correctly.  -dev xcairo
+results have good alignment and good character rendering. -dev svg results
+validate correctly at http://validator.w3.org/,
+have good alignment and good character rendering according to the
+ImageMagick "display" application and firefox, but those same results cannot
+be rendered by konqueror because it cannot find the appropriate system
+fonts. -dev qtwidget results have good alignment, but the large character
+rendering is not reliable ("squashed" left edge of "LARGE CIRCLE" for the
+three largest sizes, but no squashing at the smaller sizes).
+
+* testh.py renders a vertical line at the left edge of the window, a
+horizontal line marking the center of the vertical line, and a centred
+string of 7 "H" characters superimposed on top of the vertical line so the
+horizontal bar of the "H" is very close to the vertical line and parallel
+with it.  All drivers we have tested generate correct interactive or file
+results for this figure.  Also, the -dev svg output file validates at
+http://validator.w3.org/, and I get good rendering results for both firefox
+and konqueror for that output file.  However, those output file results are
+_not_ rendered correctly by the GNOME library, librsvg2, which is used in a
+number of applications (e.g., all GNOME text rendering applications which
+are svg aware such as eog and (depending on how ImageMagick is compiled) the
+ImageMagick "display" application).  See
+http://bugzilla.gnome.org/show_bug.cgi?id=525023 for more details.
+
+* test_superscript_subscript.py renders a series of nested superscripts and
+subscripts for single numbers from 0 to 9 and also tries some simple
+superscripts and subscripts for Greek letters and ordinary (Roman) letters.
+Devices that use our traditional Hershey fonts (e.g., -dev xwin) have
+good results for this example, but there is work to do to get similar
+good results for our more modern devices that use other means of
+superscripting and subscripting.
+
+The one current exception to this is -dev svg where the resulting output
+file validates at http://validator.w3.org/, and the dy attribute of the
+nested span tags is written correctly. Furthermore, I get good rendering
+results for this output file using the ImageMagick "display" application.
+However, in this case the vertical positioning after the Greek superscript
+or subscript letters in the output svg file is not rendered correctly by
+mozilla and konqueror.  On the other hand, those applications have no
+trouble rendering the text after superscript/subscript Roman (ordinary)
+letters.  It appears those applications are having trouble dealing with a
+nested series of span tags when there is a font change (e.g., for Greek
+letters) in the middle of the series.  The results for the pdf, cairo, and
+qt devices for this example are poor (e.g., do not agree with the good
+-dev xwin results), but it is planned to deal with those issues soon.


Property changes on: trunk/examples/python/README.rendering_tests
___________________________________________________________________
Added: svn:eol-style
   + native

Added: trunk/examples/python/test_superscript_subscript.py
===================================================================
--- trunk/examples/python/test_superscript_subscript.py	                        (rev 0)
+++ trunk/examples/python/test_superscript_subscript.py	2009-08-12 21:24:48 UTC (rev 10234)
@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+
+# Append to effective python path so that can find plplot modules.
+from plplot_python_start import *
+
+import sys
+from plplot import *
+from numpy import *
+
+# Parse and process command line arguments
+plparseopts(sys.argv, PL_PARSE_FULL)
+
+# Initialize plplot
+plinit()
+# Like yellow lines better.
+plcol0(2)
+pladv(0)
+plvpor(0.1, 0.9, 0.1, 0.9)
+plwind(0., 1., 0., 1.)
+plptex(0.5, 0.8, 1., 0., 0.5, "X#d0#d1#d2#u3#u4#u5#u6#u7#u8#d9#d0#d1")
+plptex(0.5, 0.8, 1., 0., 0.5, "X#u0#u1#u2#d3#d4#d5#d6#d7#d8#u9#u0#u1")
+plptex(0.5, 0.7, 1., 0., 0.5, "B#u#gf#d, B#ur#d")
+plptex(0.5, 0.6, 1., 0., 0.5, "B#d#gf#u, B#dr#u")
+plptex(0.5, 0.5, 1., 0., 0.5, "B#uf#d, B#ur#d")
+plptex(0.5, 0.4, 1., 0., 0.5, "B#df#u, B#dr#u")
+
+# Terminate plplot
+plend()
+


Property changes on: trunk/examples/python/test_superscript_subscript.py
___________________________________________________________________
Added: svn:executable
   + *
Added: svn:keywords
   + Author Date Id Revision
Added: svn:eol-style
   + native

Added: trunk/examples/python/testh.py
===================================================================
--- trunk/examples/python/testh.py	                        (rev 0)
+++ trunk/examples/python/testh.py	2009-08-12 21:24:48 UTC (rev 10234)
@@ -0,0 +1,32 @@
+#!/usr/bin/env python
+
+# Append to effective python path so that can find plplot modules.
+from plplot_python_start import *
+
+import sys
+from plplot import *
+from numpy import *
+
+# Parse and process command line arguments
+plparseopts(sys.argv, PL_PARSE_FULL)
+
+# Initialize plplot
+plinit()
+# Like yellow lines better.
+plcol0(2)
+pladv(0)
+plvpor(0.1, 0.9, 0.1, 0.9)
+plwind(0., 1., 0., 1.)
+x=0.*arange(2)
+y=1.*arange(2)
+plline(x,y)
+x=0.1*arange(2)
+y=0.5+0.*arange(2)
+plline(x,y)
+plschr(0., 4.)
+#plmtex("l", 0., 0.5, 0.5, "#[0x00d7]#[0x00d7]#[0x00d7]#[0x00d7]#[0x00d7]#[0x00d7]#[0x00d7]")
+plmtex("l", 0., 0.5, 0.5, "HHHHHHH")
+
+# Terminate plplot
+plend()
+


Property changes on: trunk/examples/python/testh.py
___________________________________________________________________
Added: svn:executable
   + *
Added: svn:keywords
   + Author Date Id Revision
Added: svn:eol-style
   + native


This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.