fbo: cleaned up

shader: added filter (mandatory)

J/fbo.h

@@ -23,7 +23,6 @@
 // TODO: more error checking in debug build.
 // TODO: make texture class? for easier switching between linear/nearest interpolation for example
 // NOTE: stencil attachment is not supported
-// NOTE: in end() we don't set a viewport, because it will be always set (the 'main' fbo is also an J::fbo)
 
 namespace J {
 
@@ -84,6 +83,7 @@ public:
 
 	void end(){
 		unbind();
+        // NOTE: we don't set a viewport, because it will be always set (the 'main' fbo is also an J::fbo)
 	}
 
 private:

J/shader.h

@@ -181,9 +181,11 @@ public:
 	}
 
     // textures (see todo above)
-	void set_texture(const char* name, GLenum target, GLuint tex, int textureLocation) const {
+	void set_texture(const char* name, GLenum target, GLuint tex, int textureLocation, GLenum filter = GL_LINEAR) const {
 		glActiveTexture(GL_TEXTURE0 + textureLocation);
 		glBindTexture(target, tex);
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
 		set_uniform(name, textureLocation);
 	}