gal: Check maximum framebuffer size (OpenGL).

common/gal/opengl/opengl_compositor.cpp

@@ -55,7 +55,7 @@ void OPENGL_COMPOSITOR::Initialize()
     // We need framebuffer objects for drawing the screen contents
     // Generate framebuffer and a depth buffer
     glGenFramebuffersEXT( 1, &m_framebuffer );
-    glBindFramebufferEXT( GL_FRAMEBUFFER, m_framebuffer );
+    glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, m_framebuffer );
     m_currentFbo = m_framebuffer;
 
     // Allocate memory for the depth buffer
@@ -91,10 +91,12 @@ unsigned int OPENGL_COMPOSITOR::CreateBuffer()
 {
     wxASSERT( m_initialized );
 
-    unsigned int maxBuffers;
+    unsigned int maxBuffers, maxWidth, maxHeight;
 
-    // Get the maximum number of buffers
+    // Get the maximum size & number of buffers
     glGetIntegerv( GL_MAX_COLOR_ATTACHMENTS, (GLint*) &maxBuffers );
+    glGetIntegerv( GL_MAX_FRAMEBUFFER_WIDTH, (GLint*) &maxWidth );
+    glGetIntegerv( GL_MAX_FRAMEBUFFER_HEIGHT, (GLint*) &maxHeight );
 
     if( usedBuffers() >= maxBuffers )
     {
@@ -104,6 +106,14 @@ unsigned int OPENGL_COMPOSITOR::CreateBuffer()
         return 0;    // Unfortunately we have no more free buffers left
     }
 
+    if( m_width > maxWidth || m_height > maxHeight ) {
+        DisplayError( NULL, wxString::Format( wxT( "Max handled framebuffer size is %d x %d,"
+                            " but %x x %x is required." ),
+                            maxWidth, maxHeight, m_width, m_height ) );
+
+        return 0;
+    }
+
     // GL_COLOR_ATTACHMENTn are consecutive integers
     GLuint attachmentPoint = GL_COLOR_ATTACHMENT0 + usedBuffers();
     GLuint textureTarget;