Add optional opengl support

CMakeLists.txt

@@ -28,6 +28,7 @@ include( CheckCXXSourceRuns )
 include( CheckCXXSourceCompiles )
 include( CheckLibraryExists )
 include( CheckFunctionExists )
+include( CheckSymbolExists )
 include( CheckStructHasMember )
 include( CheckTypeSize )
 
@@ -70,6 +71,7 @@ option( WITH_XRENDER "Enable xrender support" ${WITH_ALL_OPTIONS} )
 option( WITH_XDAMAGE "Enable xdamage support" ${WITH_ALL_OPTIONS} )
 option( WITH_XEXT "Enable xext support" ${WITH_ALL_OPTIONS} )
 option( WITH_XTEST "Enable xtest support" ${WITH_ALL_OPTIONS} )
+option( WITH_OPENGL "Enable openGL support" ${WITH_ALL_OPTIONS} )
 option( WITH_XSCREENSAVER "Enable xscreensaver support" ${WITH_ALL_OPTIONS} )
 option( WITH_LIBART "Enable libart support (for SVG icons and wallpapers)" ${WITH_ALL_OPTIONS} )
 option( WITH_LIBUSB "Enable control of some mouse models through libusb" ${WITH_ALL_OPTIONS} )

ConfigureChecks.cmake

@@ -168,12 +168,29 @@ if( WITH_XSCREENSAVER )
 endif( )
 
 
-# GL
-if( BUILD_KDESKTOP OR BUILD_KCONTROL OR BUILD_TDESCREENSAVER )
-check_library_exists( GL glXChooseVisual "" HAVE_GLXCHOOSEVISUAL )
-  if( HAVE_GLXCHOOSEVISUAL )
-    set( GL_LIBRARY "GL" )
+# openGL (kdesktop or kcontrol or tdescreensaver )
+if( WITH_OPENGL )
+  pkg_search_module( GL gl )
+  if( GL_FOUND )
+    # some extra check, stricktly speaking they are not necessary
+    tde_save( CMAKE_REQUIRED_LIBRARIES )
+    set( CMAKE_REQUIRED_LIBRARIES ${GL_LIBRARIES} )
+    check_symbol_exists( glXChooseVisual "GL/glx.h" HAVE_GLXCHOOSEVISUAL )
+    tde_restore( CMAKE_REQUIRED_LIBRARIES )
+    if( NOT HAVE_GLXCHOOSEVISUAL )
+      tde_message_fatal( "opengl is requested and found, but it doesn't provides glXChooseVisual() or GL/glx.h" )
+    endif( )
+  else( )
+    tde_message_fatal( "opengl is requested, but not found on your system" )
   endif( )
+
+  if( BUILD_KCONTROL )
+    pkg_search_module( GLU glu )
+    if( NOT GLU_FOUND )
+      tde_message_fatal( "glu is required, but not found on your system" )
+    endif( )
+  endif( BUILD_KCONTROL )
+
 endif( )
 
 

kcontrol/info/CMakeLists.txt

@@ -9,8 +9,6 @@
 #
 #################################################
 
-# FIXME no OPENGL support yet
-
 include_directories(
   ${CMAKE_CURRENT_BINARY_DIR}
   ${CMAKE_BINARY_DIR}
@@ -22,20 +20,27 @@ link_directories(
   ${TQT_LIBRARY_DIRS}
 )
 
+if( WITH_OPENGL )
+  add_definitions( -DINFO_OPENGL_AVAILABLE )
+  set( OPENGL_DESKTOP opengl.desktop )
+  set( OPENGL_SOURCES opengl.cpp )
+endif( WITH_OPENGL )
+
 ##### other data ################################
 
 install( FILES
     memory.desktop processor.desktop dma.desktop
-    interrupts.desktop ioports.desktop opengl.desktop
-    pci.desktop sound.desktop devices.desktop scsi.desktop
+    interrupts.desktop ioports.desktop pci.desktop
+    sound.desktop devices.desktop scsi.desktop
     partitions.desktop xserver.desktop cdinfo.desktop
+    ${OPENGL_DESKTOP}
   DESTINATION ${XDG_APPS_INSTALL_DIR} )
 
 
 ##### kcm_info (module) #########################
 
 tde_add_kpart( kcm_info AUTOMOC
-  SOURCES main.cpp memory.cpp opengl.cpp
-  LINK tdeui-shared
+  SOURCES main.cpp memory.cpp ${OPENGL_SOURCES}
+  LINK tdeui-shared ${GL_LIBRARIES} ${GLU_LIBRARIES}
   DESTINATION ${PLUGIN_INSTALL_DIR}
 )

kcontrol/info/opengl.desktop

@@ -1,5 +1,5 @@
 [Desktop Entry]
-NoDisplay=true
+# NoDisplay=true
 Exec=tdecmshell opengl
 Icon=kcmopengl
 Type=Application
@@ -8,7 +8,7 @@ DocPath=kinfocenter/opengl/index.html
 
 X-TDE-Library=info
 X-TDE-FactoryName=opengl
-X-TDE-ParentApp=kcontrol
+X-TDE-ParentApp=kinfocenter
 
 Name=OpenGL
 Name[bn]=ওপেন-জি-এল

kcontrol/screensaver/CMakeLists.txt

@@ -32,6 +32,6 @@ tde_add_kpart( kcm_screensaver AUTOMOC
     advanceddialogimpl.ui scrnsave.cpp testwin.cpp
     saverlist.cpp saverconfig.cpp advanceddialog.cpp
     kswidget.cpp
-  LINK tdeio-shared ${GL_LIBRARY}
+  LINK tdeio-shared ${GL_LIBRARIES}
   DESTINATION ${PLUGIN_INSTALL_DIR}
 )

kdesktop/lock/CMakeLists.txt

@@ -38,6 +38,6 @@ set( ${target}_SRCS
 tde_add_executable( ${target} AUTOMOC
   SOURCES ${${target}_SRCS}
   LINK kdesktopsettings-static dmctl-static tdeio-shared Xext
-    ${GL_LIBRARY} "${LINKER_IMMEDIATE_BINDING_FLAGS}"
+    ${GL_LIBRARIES} "${LINKER_IMMEDIATE_BINDING_FLAGS}"
   DESTINATION ${BIN_INSTALL_DIR}
 )

tdescreensaver/CMakeLists.txt

@@ -30,7 +30,7 @@ install( FILES KRandom.desktop KBlankscreen.desktop DESTINATION ${APPS_INSTALL_D
 
 tde_add_executable( krandom.kss AUTOMOC
   SOURCES random.cpp
-  LINK tdeui-shared ${GL_LIBRARY}
+  LINK tdeui-shared ${GL_LIBRARIES}
   DESTINATION ${BIN_INSTALL_DIR}
 )
 

tdescreensaver/random.cpp

@@ -92,7 +92,7 @@ bool hasDirectRendering () {
         return false;
     }
 #else
-#error no GL?
+    // no GL
     return false;
 #endif