Hi Dr. Schröder,
this doesn't sound like a cmake problem, more like a Qt problem :-)
Anyway, Qt implements image format codecs using plugins.
To be precise this depends on how you compiled Qt.
Check if you have to right Qt Plugins on the machine where you
encounter this problem.
More on plugins you can read on http://doc.trolltech.com/4.4/plugins-
howto.html
I hioe this helps you.
--
mit freundlichen Grüßen / best regards
Gerhard Gappmeier
ascolab GmbH - automation system communication laboratory
Tel.: +49 9131 691 123
Fax: +49 9131 691 128
Web: http://www.ascolab.com
GPG-Key: http://www.ascolab.com/gpg/gg.asc
Am 25.10.2008 um 19:20 schrieb Dr. Schröder:
Hi there,
I'm using Qt 4.4.3 Open Source edition with Visual Studio 2008 and
Cmake 2.6
Whenever I try to load an Image in my Application it doesn't load.
It does
not matter if I load it from a resource file or from the harddisc.
It does
not matter which format it has (I tried a few). It does not matter
if I load
it to a QPixmap or a QImage. There is simply nothing loaded
afterwards.
The weirdest thing about this is, that everything works fine on the
PC I
compile the program (Vista 64bit, VS 32bit). If I link the Image by
using
the Qt resource system everything is fine. I can put the Executable
anywhere
and the Image is loaded. If I put it to my WinXP laptop, the
program runs
fine, but no Image is loaded.
Any Suggestions?
Thx in advance,
Patrick
CMakeLists.txt:
# Zunaechst einige Makros. Daran sollte sich niemand stoeren,
# sie dienen dazu eine saubere Verzeichnisstruktur aufzubauen.
# Ich empfehle beim setzen des Projektnamens weiter zu lesen.
SET (UI_OUT_DIR "./src/ui")
SET (MOC_OUT_DIR "./src/moc")
SET (RSC_OUT_DIR "./src/rsc")
# QT4_WRAP_UI(outfiles inputfile ... )
MACRO (QT4_WRAP_UI_OUT outfiles )
FILE(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/${UI_OUT_DIR})
FOREACH (it ${ARGN})
GET_FILENAME_COMPONENT(it ${it} ABSOLUTE)
GET_FILENAME_COMPONENT(outfile ${it} NAME_WE)
SET(outfile ${CMAKE_CURRENT_BINARY_DIR}/${UI_OUT_DIR}/ui_$
{outfile}.h)
ADD_CUSTOM_COMMAND(OUTPUT ${outfile}
COMMAND ${QT_UIC_EXECUTABLE} -o ${outfile} ${it}
MAIN_DEPENDENCY ${infile})
SET(${outfiles} ${${outfiles}} ${outfile})
ENDFOREACH (it)
ENDMACRO (QT4_WRAP_UI_OUT)
# QT4_WRAP_CPP(outfiles inputfile ... )
MACRO (QT4_WRAP_CPP_OUT outfiles )
FILE(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/${MOC_OUT_DIR})
FOREACH (it ${ARGN})
GET_FILENAME_COMPONENT(it ${it} ABSOLUTE)
GET_FILENAME_COMPONENT(outfile ${it} NAME_WE)
SET(outfile
${CMAKE_CURRENT_BINARY_DIR}/${MOC_OUT_DIR}/moc_${outfile}.cpp)
ADD_CUSTOM_COMMAND(OUTPUT ${outfile}
COMMAND ${QT_MOC_EXECUTABLE} -o ${outfile} ${it}
DEPENDS ${it})
SET(${outfiles} ${${outfiles}} ${outfile})
ENDFOREACH(it)
ENDMACRO (QT4_WRAP_CPP_OUT)
# QT4_ADD_STATIC_RESOURCES(outfiles inputfile ... )
MACRO (QT4_ADD_STATIC_RESOURCES outfiles )
FILE(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/${RSC_OUT_DIR})
FOREACH (it ${ARGN})
GET_FILENAME_COMPONENT(outfilename ${it} NAME_WE)
GET_FILENAME_COMPONENT(infile ${it} ABSOLUTE)
GET_FILENAME_COMPONENT(rc_path ${infile} PATH)
SET(outfile
${CMAKE_CURRENT_BINARY_DIR}/${RSC_OUT_DIR}/qrc_${outfilename}.cpp)
# parse file for dependencies
FILE(READ "${infile}" _RC_FILE_CONTENTS)
STRING(REGEX MATCHALL "<file>[^<]*" _RC_FILES "$
{_RC_FILE_CONTENTS}")
SET(_RC_DEPENDS)
FOREACH(_RC_FILE ${_RC_FILES})
STRING(REGEX REPLACE "^<file>" "" _RC_FILE "${_RC_FILE}")
SET(_RC_DEPENDS ${_RC_DEPENDS} "${rc_path}/${_RC_FILE}")
ENDFOREACH(_RC_FILE)
ADD_CUSTOM_COMMAND(OUTPUT ${outfile}
COMMAND ${QT_RCC_EXECUTABLE}
ARGS -name ${outfilename} -o ${outfile} ${infile}
MAIN_DEPENDENCY ${infile}
DEPENDS ${_RC_DEPENDS})
SET(${outfiles} ${${outfiles}} ${outfile})
ENDFOREACH (it)
ENDMACRO (QT4_ADD_STATIC_RESOURCES)
# Der Name des Projekts
PROJECT( ProjektName )
# Die verwendete CMake Version (gibt eine Fehlermeldung, wenn nicht
gesetzt)
cmake_minimum_required(VERSION 2.6)
# Mithilfe von SET() kann man Variablen definieren, oder ihre
Definition
aendern.
# Hier definieren wir alle Quelldateien zur spaeteren Verwendung.
SET( PROJEKTNAME_SRCS
./src/main.cpp
./src/MainWindow.cpp
)
# Man muss die Header Dateien eigentlich nicht separat definieren,
es dient
nur der
# Uebersicht
SET( PROJEKTNAME_HEADERS
# in dem Beispielprojekt gibt es nur einen Header und der wird als
naechstes
angegeben
)
# Hier werden alle Header Dateien spezifiziert, die zu MOC_ files
umgewandelt werden sollen.
# Typischerweise alle, die Q_OBJECT enthalten.
SET( PROJEKTNAME_MOC_HDRS
./src/MainWindow.h
)
# Die .ui Dateien
SET( PROJEKTNAME_UIS
./ui/MainWindow.ui
)
# und letztendlich die Ressource Datei
SET( PROJEKTNAME_RCS
./rsc/ProjektName.qrc
)
# Warnungen aktivieren
# ADD_DEFINITIONS( -Wall )
# Qt Module, die geladen werden sollen. In diesem Fall nichts.
QtCore und
QtGui sind Standard
# SET(
# QT_USE_QTOPENGL TRUE
# )
# Sucht Qt4
FIND_PACKAGE( Qt4 REQUIRED )
# QT_USE_FILE wurde von FIND_PACKAGE definiert und enthält den Pfad
zu Qt
INCLUDE( ${QT_USE_FILE} )
# Fuegt statische resourcen hinzu
QT4_ADD_STATIC_RESOURCES( RC_SRCS ${PROJEKTNAME_RCS} )
# Erzeugt ui_*.h Dateien aus den gegebenen Designer Dateien.
QT4_WRAP_UI_OUT( UI_HDRS ${PROJEKTNAME_UIS} )
# Hiermit wird die Anweisung gegeben, die MOC_*.cpp Dateien zu
erzeugen.
QT4_WRAP_CPP_OUT( MOC_SRCS ${PROJEKTNAME_MOC_HDRS} )
# Wir muessen die Generierten dateien zu den include Directories
hinzufuegen, um die Generierten .h Dateien
# dem Projekt hinzufügen zu koennnen.
INCLUDE_DIRECTORIES(
${CMAKE_BINARY_DIR}/${UI_OUT_DIR}
${CMAKE_BINARY_DIR}/${MOC_OUT_DIR}
${CMAKE_BINARY_DIR}/${RSC_OUT_DIR}
)
# Hier weisen wir CMake an, welche Dateien zur Anwendung
hinzukompiliert
werden sollen
ADD_EXECUTABLE( ProjektName ${PROJEKTNAME_SRCS} ${PROJEKTNAME_HEADERS}
${PROJEKTNAME_MOC_HDRS} ${MOC_SRCS} ${RC_SRCS} ${UI_HDRS} )
# Zu guter Letzt muessen wir CMake mitteilen, welche Libraries fuer
unsere
Anwendung benoetigt werden.
# FIND_PACKAGE hat QT_LIBRARIES schon fuer uns vorbereitet.
TARGET_LINK_LIBRARIES( ProjektName ${QT_LIBRARIES} )
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