Initial pass at integrating Differ into the chromoting host code....

remoting/host/capturer_fake_ascii.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/host/capturer_fake_ascii.h"
 
 #include "gfx/rect.h"
 
 namespace remoting {
 
 static const int kWidth = 32;
 static const int kHeight = 20;
 static const int kBytesPerPixel = 1;
 
 CapturerFakeAscii::CapturerFakeAscii() {
 }
 
 CapturerFakeAscii::~CapturerFakeAscii() {
 }
 
-void CapturerFakeAscii::CaptureRects(const RectVector& rects,
-                                     CaptureCompletedCallback* callback) {
-  GenerateImage();
-  DataPlanes planes;
-  planes.data[0] = buffers_[current_buffer_].get();
-  planes.strides[0] = bytes_per_row_;
-  scoped_refptr<CaptureData> capture_data(new CaptureData(planes,
-                                                          width_,
-                                                          height_,
-                                                          pixel_format_));
-  FinishCapture(capture_data, callback);
-}
-
 void CapturerFakeAscii::ScreenConfigurationChanged() {
   width_ = kWidth;
   height_ = kHeight;
   pixel_format_ = PixelFormatAscii;
   bytes_per_row_ = width_ * kBytesPerPixel;
 
   // Create memory for the buffers.
   int buffer_size = height_ * bytes_per_row_;
   for (int i = 0; i < kNumBuffers; i++) {
     buffers_[i].reset(new uint8[buffer_size]);
   }
 }
 
+void CapturerFakeAscii::CalculateInvalidRects() {
+  // Capture and invalidate the entire screen.
+  // Performing the capture here is modelled on the Windows
+  // GDI capturer.
+  GenerateImage();
+  InvalidateFullScreen();
+}
+
+void CapturerFakeAscii::CaptureRects(const InvalidRects& rects,
+                                     CaptureCompletedCallback* callback) {
+  DataPlanes planes;
+  planes.data[0] = buffers_[current_buffer_].get();
+  planes.strides[0] = bytes_per_row_;
+  scoped_refptr<CaptureData> capture_data(new CaptureData(planes,
+                                                          width_,
+                                                          height_,
+                                                          pixel_format_));
+  FinishCapture(capture_data, callback);
+}
+
 void CapturerFakeAscii::GenerateImage() {
   for (int y = 0; y < height_; ++y) {
     uint8* row = buffers_[current_buffer_].get() + bytes_per_row_ * y;
     for (int x = 0; x < bytes_per_row_; ++x) {
       if (y == 0 || x == 0 || x == (width_ - 1) || y == (height_ - 1)) {
         row[x] = '*';
       } else {
         row[x] = ' ';
       }
     }
   }
 }
 
 }  // namespace remoting