fixes in EGL platform

src/framework/graphics/framebuffer.cpp

@@ -77,6 +77,7 @@ void FrameBuffer::resize(const Size& size)
         internalRelease();
     } else {
         m_screenBackup = TexturePtr(new Texture(size.width(), size.height()));
+        m_screenBackup->setUpsideDown(true);
     }
 }
 

src/framework/graphics/glutil.h

@@ -44,6 +44,7 @@
 typedef char             GLchar;
 
 // define OpenGL ES 2.0 API just to make compile, it wont actually be used
+inline void glBlendFuncSeparate (GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha) { }
 inline void glBindFramebuffer (GLenum target, GLuint framebuffer) { }
 inline void glDeleteFramebuffers (GLsizei n, const GLuint* framebuffers) { }
 inline void glFramebufferTexture2D (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level) { }

src/framework/graphics/graphics.cpp

@@ -359,8 +359,10 @@ bool Graphics::canUseClampToEdge()
 
 bool Graphics::canUseBlendFuncSeparate()
 {
-#ifdef OPENGL_ES
+#if OPENGL_ES==2
     return true;
+#elif OPENGL_ES==1
+    return false;
 #else
     if(!GLEW_VERSION_1_4)
         return false;