improve framebuffer creation error messages

src/graphics/core/Framebuffer.cpp

@@ -3,6 +3,7 @@
 #include <GL/glew.h>
 #include "Texture.hpp"
 #include "debug/Logger.hpp"
+#include "gl_util.hpp"
 
 static debug::Logger logger("gl-framebuffer");
 
@@ -48,8 +49,12 @@ Framebuffer::Framebuffer(uint width, uint height, bool alpha)
     glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height);
     glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth);
 
-    if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
-        logger.error() << "framebuffer is not complete!";
+    GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+    if (status != GL_FRAMEBUFFER_COMPLETE) {
+        auto logLine = logger.error();
+        logLine << "framebuffer is not complete: ";
+        logLine << gl::to_string(status);
+        logLine << " (" << status << ")";
     }
 
     glBindFramebuffer(GL_FRAMEBUFFER, 0);

src/graphics/core/gl_util.hpp

@@ -45,4 +45,26 @@ namespace gl {
         }
         return 0;
     }
+
+    /// TODO: extend
+    inline const char* to_string(GLenum item) {
+        switch (item) {
+            case GL_FRAMEBUFFER_UNDEFINED:
+                return "framebuffer undefined";
+            case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
+                return "framebuffer incomplete attachment";
+            case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
+                return "framebuffer incomplete missing attachment";
+            case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
+                return "framebuffer incomplete draw buffer";
+            case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
+                return "framebuffer incomplete read buffer";
+            case GL_FRAMEBUFFER_UNSUPPORTED:
+                return "framebuffer unsupported";
+            case GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE:
+                return "framebuffer incomplete multisample";
+            default:
+                return "unknown";
+        }
+    }
 }