flush font texture fix

Author: codeanticode

core/src/processing/opengl/FontTexture.java

@@ -149,15 +149,9 @@ public boolean addTexture(PGraphicsOpenGL pg) {
     } else if (resize) {
       // Replacing old smaller texture with larger one.
       // But first we must copy the contents of the older
-      // texture into the new one. Setting blend mode to
-      // REPLACE to preserve color of transparent pixels.
+      // texture into the new one.
       Texture tex0 = textures[lastTex];
-
-      tex.pg.pushStyle();
-      tex.pg.blendMode(REPLACE);
       tex.put(tex0);
-      tex.pg.popStyle();
-
       textures[lastTex] = tex;
 
       pg.setCache(images[lastTex], tex);

core/src/processing/opengl/Texture.java

@@ -1224,10 +1224,10 @@ protected void copyTexture(Texture tex, int x, int y, int w, int h,
     // FBO copy:
     pg.pushFramebuffer();
     pg.setFramebuffer(tempFbo);
-    // Clear the color buffer to make sure that the alpha channel is set to
-    // full transparency
-    pgl.clearColor(0, 0, 0, 0);
-    pgl.clear(PGL.COLOR_BUFFER_BIT);
+    // Replaces anything that this texture might contain in the area being
+    // replaced by the new one.
+    pg.pushStyle();
+    pg.blendMode(REPLACE);
     if (scale) {
       // Rendering tex into "this", and scaling the source rectangle
       // to cover the entire destination region.
@@ -1243,8 +1243,10 @@ protected void copyTexture(Texture tex, int x, int y, int w, int h,
                       0, 0, tempFbo.width, tempFbo.height, 1,
                       x, y, x + w, y + h, x, y, x + w, y + h);
     }
+    pgl.flush(); // Needed to make sure that the change in this texture is
+                 // available immediately.
+    pg.popStyle();
     pg.popFramebuffer();
-
     updateTexels(x, y, w, h);
   }
 
@@ -1264,6 +1266,10 @@ protected void copyTexture(int texTarget, int texName,
     // FBO copy:
     pg.pushFramebuffer();
     pg.setFramebuffer(tempFbo);
+    // Replaces anything that this texture might contain in the area being
+    // replaced by the new one.
+    pg.pushStyle();
+    pg.blendMode(REPLACE);
     if (scale) {
       // Rendering tex into "this", and scaling the source rectangle
       // to cover the entire destination region.
@@ -1279,6 +1285,9 @@ protected void copyTexture(int texTarget, int texName,
                       0, 0, tempFbo.width, tempFbo.height,
                       x, y, w, h, x, y, w, h);
     }
+    pgl.flush(); // Needed to make sure that the change in this texture is
+                 // available immediately.
+    pg.popStyle();
     pg.popFramebuffer();
     updateTexels(x, y, w, h);
   }