Smallest possible desktop application that uses Skia to render stuff.

src/views/unix/SkOSWindow_Unix.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
 #include <X11/XKBlib.h>
@@ skipping 164 matching lines @@
     SkMSec ms = gTimerDelay;
     if (ms > 0) {
         int x11_fd = ConnectionNumber(dsp);
         fd_set input_fds;
         FD_ZERO(&input_fds);
         FD_SET(x11_fd, &input_fds);
 
         timeval tv;
         tv.tv_sec = ms / 1000;              // seconds
         tv.tv_usec = (ms % 1000) * 1000;    // microseconds
-        
+
         (void)select(x11_fd + 1, &input_fds, NULL, NULL, &tv);
     }
 
     if (XPending(dsp)) {
         XNextEvent(dsp, evt);
     }
 }
 
 SkOSWindow::NextXEventResult SkOSWindow::nextXEvent() {
     XEvent evt;
@@ skipping 171 matching lines @@
     image.depth = 24;
     image.bytes_per_line = bitmap.rowBytes() - bitmap.width() * 4;
     image.bits_per_pixel = bitsPerPixel;
     return XInitImage(&image);
 }
 
 void SkOSWindow::doPaint() {
     if (NULL == fUnixWindow.fDisplay) {
         return;
     }
+    // If we are drawing with GL, we don't need XPutImage.
+    if (NULL != fUnixWindow.fGLContext) {
+        return;
+    }

[sglez, 2013/06/17 18:04:35]

This is a fix to Mike's recent changes; it fixes a screen flickering problem.
The XPutImage call causes the problem when drawing with GL so we return early.

     // Draw the bitmap to the screen.
     const SkBitmap& bitmap = getBitmap();
     int width = bitmap.width();
     int height = bitmap.height();
 
     XImage image;
     if (!convertBitmapToXImage(image, bitmap)) {
         return;
     }
 
@@ skipping 11 matching lines @@
 void SkEvent::SignalNonEmptyQueue() {
     // nothing to do, since we spin on our event-queue, polling for XPending
 }
 
 void SkEvent::SignalQueueTimer(SkMSec delay) {
     // just need to record the delay time. We handle waking up for it in
     // MyXNextEventWithDelay()
     gTimerDelay = delay;
 }