[Chromoting] Initial plumbing for cursor shape.

remoting/client/plugin/pepper_view.cc

Index: remoting/client/plugin/pepper_view.cc
diff --git a/remoting/client/plugin/pepper_view.cc b/remoting/client/plugin/pepper_view.cc
index 6b67eacf77cf674332e270353e812ee77e032fbb..abf518160d5e80ad0eeba4e6cae82cc3cd572967 100644
--- a/remoting/client/plugin/pepper_view.cc
+++ b/remoting/client/plugin/pepper_view.cc
@@ -12,6 +12,7 @@
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/graphics_2d.h"
 #include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/mouse_cursor.h"
 #include "ppapi/cpp/point.h"
 #include "ppapi/cpp/rect.h"
 #include "ppapi/cpp/size.h"
@@ -149,6 +150,51 @@ protocol::ClipboardStub* PepperView::GetClipboardStub() {
   return instance_;
 }
 
+void PepperView::SetCursorShape(const protocol::CursorShapeInfo& cursor_shape) {
+  if (!cursor_shape.has_data() ||
+      !cursor_shape.has_width() ||
+      !cursor_shape.has_height() ||
+      !cursor_shape.has_hotspot_x() ||
+      !cursor_shape.has_hotspot_y()) {
+    return;
+  }
+
+  if (pp::ImageData::GetNativeImageDataFormat() !=
+      PP_IMAGEDATAFORMAT_BGRA_PREMUL) {
+    LOG(WARNING) << "Unable to set cursor shape - non-native image format";
+    return;
+  }
+
+  int width = cursor_shape.width();
+  int height = cursor_shape.height();
+
+  if (width > 32 || height > 32) {
+    LOG(WARNING) << "Cursor too large for SetCursor: "
+                 << width << "x" << height << " > 32x32";
+    return;
+  }
+
+  int hotspot_x = cursor_shape.hotspot_x();
+  int hotspot_y = cursor_shape.hotspot_y();
+
+  pp::ImageData cursor_image(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
+                             pp::Size(width, height), false);
+
+  int bytes_per_row = width * 4;
+  const uint8* src_row_data = reinterpret_cast<const uint8*>(
+      cursor_shape.data().data());
+  uint8* dst_row_data = reinterpret_cast<uint8*>(cursor_image.data());
+  for (int row = 0; row < height; row++) {
+    memcpy(dst_row_data, src_row_data, bytes_per_row);
+    src_row_data += bytes_per_row;
+    dst_row_data += cursor_image.stride();
+  }
+
+  pp::MouseCursor::SetCursor(instance_, PP_MOUSECURSOR_TYPE_CUSTOM,
+                             cursor_image,
+                             pp::Point(hotspot_x, hotspot_y));
+}
+
 void PepperView::SetView(const SkISize& view_size, const SkIRect& clip_area) {
   bool view_changed = false;