SVN commit 1010101 by rivol:

Remove libglu dependancy

 M  +0 -3      CMakeLists.txt  
 M  +1 -1      core/kgllib/CMakeLists.txt  
 M  +26 -4     core/kgllib/kgllib.cpp  
 M  +9 -2      core/kgllib/kgllib.h  
 M  +2 -1      extras/kgllib/hdrglwidget.cpp  
 M  +2 -1      extras/kgllib/widgetproxy.cpp  


--- trunk/playground/libs/kgllib/CMakeLists.txt #1010100:1010101
@@ -25,9 +25,6 @@
 find_package(OpenGL REQUIRED)
 find_package(GLEW)
 find_package(Eigen2 REQUIRED)
-if(NOT OPENGL_GLU_FOUND)
-    message(FATAL_ERROR "GLU was not found")
-endif(NOT OPENGL_GLU_FOUND)
 
 # Taken from FindKDE4Internal.cmake
 set(INSTALL_TARGETS_DEFAULT_ARGS  RUNTIME DESTINATION "${BIN_INSTALL_DIR}"
--- trunk/playground/libs/kgllib/core/kgllib/CMakeLists.txt #1010100:1010101
@@ -34,7 +34,7 @@
 
 add_library(kgllib SHARED ${kgllib_SRCS})
 
-target_link_libraries(kgllib ${OPENGL_gl_LIBRARY} ${QT_QTOPENGL_LIBRARY} ${QT_QTGUI_LIBRARY} ${QT_QTCORE_LIBRARY} ${GLEW_GLEW_LIBRARY} ${OPENGL_glu_LIBRARY})
+target_link_libraries(kgllib ${OPENGL_gl_LIBRARY} ${QT_QTOPENGL_LIBRARY} ${QT_QTGUI_LIBRARY} ${QT_QTCORE_LIBRARY} ${GLEW_GLEW_LIBRARY})
 set_target_properties(kgllib PROPERTIES
         VERSION ${KGLLIB_LIB_VERSION}
         SOVERSION ${KGLLIB_LIB_SOVERSION}
--- trunk/playground/libs/kgllib/core/kgllib/kgllib.cpp #1010100:1010101
@@ -3,7 +3,7 @@
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either 
+ * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ -11,7 +11,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
- * You should have received a copy of the GNU Lesser General Public 
+ * You should have received a copy of the GNU Lesser General Public
  * License along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
@@ -51,11 +51,33 @@
     if (error == GL_NO_ERROR) {
         return true;
     } else {
-        const char* errString = (const char*)gluErrorString(error);
-        qCritical() << qPrintable(desc) << ":" << errString;
+        qCritical() << qPrintable(desc) << ":" << glErrorString(error);
         return false;
     }
 }
 
+// This function has been taked (and somewhat adapted) from Mesa's libglu, which is licenced under LGPL2+
+const char* glErrorString(GLenum errorCode)
+{
+    /* GL Errors */
+    if (errorCode == GL_NO_ERROR) {
+        return "no error";
+    } else if (errorCode == GL_INVALID_VALUE) {
+        return "invalid value";
+    } else if (errorCode == GL_INVALID_ENUM) {
+        return "invalid enum";
+    } else if (errorCode == GL_INVALID_OPERATION) {
+        return "invalid operation";
+    } else if (errorCode == GL_STACK_OVERFLOW) {
+        return "stack overflow";
+    } else if (errorCode == GL_STACK_UNDERFLOW) {
+        return "stack underflow";
+    } else if (errorCode == GL_OUT_OF_MEMORY) {
+        return "out of memory";
+    } else {
+        return 0;
+    }
 }
 
+}
+
--- trunk/playground/libs/kgllib/core/kgllib/kgllib.h #1010100:1010101
@@ -3,7 +3,7 @@
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either 
+ * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ -11,7 +11,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
- * You should have received a copy of the GNU Lesser General Public 
+ * You should have received a copy of the GNU Lesser General Public
  * License along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
@@ -54,6 +54,13 @@
  **/
 KGLLIB_EXPORT bool checkGLError(const QString& desc);
 
+/**
+ * @return error string corresponding to the given OpenGL error code.
+ *
+ * This is similar to the gluErrorString() function, except that it does not handle GLU-specific
+ *  error codes. The function is included in KGLLib to make it independant from libglu.
+ **/
+KGLLIB_EXPORT const char* glErrorString(GLenum errorCode);
 
 /**
  * Pointer to the global renderer object.
--- trunk/playground/libs/kgllib/extras/kgllib/hdrglwidget.cpp #1010100:1010101
@@ -427,7 +427,8 @@
 
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
-    gluOrtho2D(0, width, 0, height);
+    // This is same as  gluOrtho2D(0, width, 0, height);
+    glOrtho(0, width, 0, height, -1.0, 1.0);
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();
 }
--- trunk/playground/libs/kgllib/extras/kgllib/widgetproxy.cpp #1010100:1010101
@@ -62,7 +62,8 @@
         //  the OpenGL paintengine does
         glMatrixMode(GL_PROJECTION);
         glLoadIdentity();
-        gluOrtho2D(0, width(), height(), 0);
+        // This is same as  gluOrtho2D(0, width(), height(), 0);
+        glOrtho(0, width(), height(), 0, -1.0, 1.0);
         glMatrixMode(GL_MODELVIEW);
         glLoadIdentity();
     }