remove grey antialias border

src/GPUFontAtlasLayerCombo.cpp

@@ -1,12 +1,14 @@
 #include "GPUFontAtlasLayerCombo.h"
 #include "Utils.h"
 #include "font.hpp"
+#include "ofAppRunner.h"
 #include "ofColor.h"
 #include "ofEvents.h"
 #include "ofGraphics.h"
 #include "ofRectangle.h"
 #include "ofUtils.h"
 #include "quaternion.hpp"
+#include <GL/gl.h>
 
 namespace ofxVariableLab {
 
@@ -149,16 +151,22 @@ void GPUFontAtlasLayerCombo::draw(){
     glm::mat4 view = transform.getViewMatrix();
     glm::mat4 model = glm::mat4(1.0f);
 
+    //glClearColor(1.0f, 1.0f, 1.0f, 1.0f);              // background color
+    //glClear(GL_COLOR_BUFFER_BIT);                        // clear background with background color
+
     // Uses premultiplied-alpha.
+    ofDisableDepthTest();
     glEnable(GL_BLEND);
     glBlendEquation(GL_FUNC_ADD);
-    glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
-    ofDisableDepthTest();
-    ofEnableAlphaBlending();
+    //glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+    glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE);
+    //ofEnableAlphaBlending();
 
     int currentProgram;
     glGetIntegerv(GL_CURRENT_PROGRAM, &currentProgram);
 
+    antiAliasingWindowSize = ofMap(ofGetMouseX(), 0, ofGetWidth(), 0, 8);
+    enableSuperSamplingAntiAliasing = ofGetMouseY() > ofGetHeight() / 2;
     float superLineHeight = 0;
     if(font){
         OFX_PROFILER_SCOPE("draw font");
@@ -314,6 +322,8 @@ void GPUFontAtlasLayerCombo::draw(){
         "fps: " + ofToString(ofGetFrameRate()) + "\n"
         + "font: " + this->identifier.fontPath + "\n"
         + "lineHEight: " + ofToString(superLineHeight) + "\n"
+        + "antiAliasingWindowSize: " + ofToString(antiAliasingWindowSize) + "\n"
+        + "SSAA: " + (enableSuperSamplingAntiAliasing ? "on" : "off") + "\n"
         , 20, 20);
 }
 

src/GPUFontAtlasLayerCombo.h

@@ -101,7 +101,7 @@ class GPUFontAtlasLayerCombo : public AtlasLayerCombo {
 //   0 - no anti-aliasing
 //   1 - normal anti-aliasing
 // >=2 - exaggerated effect
-        int antiAliasingWindowSize = 1;
+        float antiAliasingWindowSize = 2;
 // Enable a second ray along the y-axis to achieve 2-dimensional anti-aliasing.
         bool enableSuperSamplingAntiAliasing = true;
 // Draw control points for debugging (green - on curve, magenta - off curve).