Platform: move eglErrorString() helper to separate header.

It will be useful also elsewhere.

src/Magnum/Platform/CMakeLists.txt

@@ -171,7 +171,9 @@ if(NEED_EGLCONTEXT)
     if(NOT EGL_FOUND)
         message(FATAL_ERROR "EGL library, required by some window contexts, was not found. Set WITH_*EGL*APPLICATION to OFF to skip building them.")
     endif()
-    add_library(MagnumEglContextHandler OBJECT Implementation/EglContextHandler.cpp)
+    add_library(MagnumEglContextHandler OBJECT
+        Implementation/EglContextHandler.cpp
+        Implementation/Egl.cpp)
     # X11 macros are a mess, disable warnings for C-style casts
     set_target_properties(MagnumEglContextHandler PROPERTIES COMPILE_FLAGS "-Wno-old-style-cast")
 endif()

src/Magnum/Platform/Implementation/Egl.cpp

@@ -0,0 +1,54 @@
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013, 2014
+              Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include "Egl.h"
+
+namespace Magnum { namespace Platform { namespace Implementation {
+
+const char* eglErrorString(const EGLint error) {
+    switch(error) {
+        #define _error(name) case name: return #name;
+        _error(EGL_SUCCESS)
+        _error(EGL_NOT_INITIALIZED)
+        _error(EGL_BAD_ACCESS)
+        _error(EGL_BAD_ALLOC)
+        _error(EGL_BAD_ATTRIBUTE)
+        _error(EGL_BAD_CONTEXT)
+        _error(EGL_BAD_CONFIG)
+        _error(EGL_BAD_CURRENT_SURFACE)
+        _error(EGL_BAD_DISPLAY)
+        _error(EGL_BAD_SURFACE)
+        _error(EGL_BAD_MATCH)
+        _error(EGL_BAD_PARAMETER)
+        _error(EGL_BAD_NATIVE_PIXMAP)
+        _error(EGL_BAD_NATIVE_WINDOW)
+        _error(EGL_CONTEXT_LOST)
+        #undef _error
+    }
+
+    return "EGL_(invalid)";
+}
+
+}}}

src/Magnum/Platform/Implementation/Egl.h

@@ -0,0 +1,36 @@
+#ifndef Magnum_Platform_Implementation_Egl_h
+#define Magnum_Platform_Implementation_Egl_h
+/*
+    This file is part of Magnum.
+
+    Copyright © 2010, 2011, 2012, 2013, 2014
+              Vladimír Vondruš <mosra@centrum.cz>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+*/
+
+#include <EGL/egl.h>
+
+namespace Magnum { namespace Platform { namespace Implementation {
+
+const char* eglErrorString(EGLint error);
+
+}}}
+
+#endif

src/Magnum/Platform/Implementation/EglContextHandler.cpp

@@ -32,6 +32,8 @@
 #include "Magnum/Context.h"
 #include "Magnum/Version.h"
 
+#include "Egl.h"
+
 namespace Magnum { namespace Platform { namespace Implementation {
 
 EglContextHandler::~EglContextHandler() {
@@ -44,7 +46,7 @@ VisualId EglContextHandler::getVisualId(EGLNativeDisplayType nativeDisplay) {
     /* Initialize */
     display = eglGetDisplay(nativeDisplay);
     if(!eglInitialize(display, nullptr, nullptr)) {
-        Error() << "Cannot initialize EGL:" << errorString(eglGetError());
+        Error() << "Cannot initialize EGL:" << Implementation::eglErrorString(eglGetError());
         std::exit(1);
     }
 
@@ -54,7 +56,7 @@ VisualId EglContextHandler::getVisualId(EGLNativeDisplayType nativeDisplay) {
     EGLenum api = EGL_OPENGL_ES_API;
     #endif
     if(!eglBindAPI(api)) {
-        Error() << "Cannot bind EGL API:" << errorString(eglGetError());
+        Error() << "Cannot bind EGL API:" << Implementation::eglErrorString(eglGetError());
         std::exit(1);
     }
 
@@ -77,7 +79,7 @@ VisualId EglContextHandler::getVisualId(EGLNativeDisplayType nativeDisplay) {
     };
     EGLint configCount;
     if(!eglChooseConfig(display, attribs, &config, 1, &configCount)) {
-        Error() << "Cannot get EGL visual config:" << errorString(eglGetError());
+        Error() << "Cannot get EGL visual config:" << Implementation::eglErrorString(eglGetError());
         std::exit(1);
     }
 
@@ -89,7 +91,7 @@ VisualId EglContextHandler::getVisualId(EGLNativeDisplayType nativeDisplay) {
     /* Get visual ID */
     EGLint visualId;
     if(!eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID, &visualId)) {
-        Error() << "Cannot get native visual ID:" << errorString(eglGetError());
+        Error() << "Cannot get native visual ID:" << Implementation::eglErrorString(eglGetError());
         std::exit(1);
     }
 
@@ -140,40 +142,16 @@ void EglContextHandler::createContext(const AbstractXApplication::Configuration&
     }
     #endif
 
-    if(!eglCreateContext(display, config, EGL_NO_CONTEXT, attributes)) {
-        Error() << "Cannot create EGL context:" << errorString(eglGetError());
+    if(!(context = eglCreateContext(display, config, EGL_NO_CONTEXT, attributes))) {
+        Error() << "Cannot create EGL context:" << Implementation::eglErrorString(eglGetError());
         std::exit(1);
     }
     if(!(surface = eglCreateWindowSurface(display, config, window, nullptr))) {
-        Error() << "Cannot create window surface:" << errorString(eglGetError());
+        Error() << "Cannot create window surface:" << Implementation::eglErrorString(eglGetError());
         std::exit(1);
     }
 
     /** @bug Fixme: On desktop OpenGL and Mesa EGL implementation OpenGL version is 1.0, which is wrong */
 }
 
-const char* EglContextHandler::errorString(EGLint error) {
-    switch(error) {
-        #define _error(name) case name: return #name;
-        _error(EGL_SUCCESS)
-        _error(EGL_NOT_INITIALIZED)
-        _error(EGL_BAD_ACCESS)
-        _error(EGL_BAD_ALLOC)
-        _error(EGL_BAD_ATTRIBUTE)
-        _error(EGL_BAD_CONTEXT)
-        _error(EGL_BAD_CONFIG)
-        _error(EGL_BAD_CURRENT_SURFACE)
-        _error(EGL_BAD_DISPLAY)
-        _error(EGL_BAD_SURFACE)
-        _error(EGL_BAD_MATCH)
-        _error(EGL_BAD_PARAMETER)
-        _error(EGL_BAD_NATIVE_PIXMAP)
-        _error(EGL_BAD_NATIVE_WINDOW)
-        _error(EGL_CONTEXT_LOST)
-        #undef _error
-    }
-
-    return {};
-}
-
 }}}

src/Magnum/Platform/Implementation/EglContextHandler.h

@@ -71,8 +71,6 @@ class EglContextHandler: public AbstractContextHandler<AbstractXApplication::Con
         }
 
     private:
-        const char* errorString(EGLint error);
-
         EGLDisplay display;
         EGLConfig config;
         EGLSurface surface;