began transition to gles

rendering/framebufferobject.cpp

@@ -1,6 +1,8 @@
 #include "framebufferobject.h"
 
 #include <QOpenGLFunctions>
+#include <QOpenGLExtraFunctions>
+#include <QDebug>
 
 FramebufferObject::FramebufferObject() :
   buffer_(0),
@@ -39,16 +41,16 @@ void FramebufferObject::Create(QOpenGLContext *ctx, int width, int height)
   ctx->functions()->glBindTexture(GL_TEXTURE_2D, texture_);
 
   // allocate storage for texture
-  ctx->functions()->glTexImage2D(
-        GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr
+  glTexImage2D(
+        GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA8, GL_UNSIGNED_BYTE, nullptr
         );
 
   // set texture filtering to bilinear
-  ctx->functions()->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-  ctx->functions()->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
   // attach texture to framebuffer
-  ctx->functions()->glFramebufferTexture2D(
+  ctx->extraFunctions()->glFramebufferTexture2D(
         GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture_, 0
         );