SW backend for viewer on Windows

tools/viewer/sk_app/unix/RasterWindowContext_unix.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "WindowContextFactory_unix.h"
 #include "../RasterWindowContext.h"
 #include "SkSurface.h"
 
 using sk_app::RasterWindowContext;
 using sk_app::DisplayParams;
 
 namespace {
 
 class RasterWindowContext_xlib : public RasterWindowContext {
 public:
     RasterWindowContext_xlib(Display*, XWindow, const DisplayParams&);
 
     sk_sp<SkSurface> getBackbufferSurface() override;
     void swapBuffers() override;
     bool isValid() override { return SkToBool(fWindow); }
-    void resize(uint32_t w, uint32_t h) override;
+    void resize(int  w, int h) override;
     void setDisplayParams(const DisplayParams& params) override;
 
 protected:
     sk_sp<SkSurface> fBackbufferSurface;
     Display* fDisplay;
     XWindow  fWindow;
     GC       fGC;
 };
 
 RasterWindowContext_xlib::RasterWindowContext_xlib(Display* display, XWindow window,
                                                    const DisplayParams& params)
         : fDisplay(display)
         , fWindow(window) {
     fDisplayParams = params;
     XWindowAttributes attrs;
     XGetWindowAttributes(fDisplay, fWindow, &attrs);
     fGC = XCreateGC(fDisplay, fWindow, 0, nullptr);
     this->resize(attrs.width, attrs.height);
 }
 
 void RasterWindowContext_xlib::setDisplayParams(const DisplayParams& params) {
     fDisplayParams = params;
     XWindowAttributes attrs;
     XGetWindowAttributes(fDisplay, fWindow, &attrs);
     this->resize(attrs.width, attrs.height);
 }
 
-void RasterWindowContext_xlib::resize(uint32_t w, uint32_t h) {
+void RasterWindowContext_xlib::resize(int  w, int h) {
     SkImageInfo info = SkImageInfo::Make(w, h, fDisplayParams.fColorType, kPremul_SkAlphaType,
                                          fDisplayParams.fColorSpace);
     fBackbufferSurface = SkSurface::MakeRaster(info);
 
 }
 
 sk_sp<SkSurface> RasterWindowContext_xlib::getBackbufferSurface() { return fBackbufferSurface; }
 
 void RasterWindowContext_xlib::swapBuffers() {
     SkPixmap pm;
@@ skipping 28 matching lines @@
     WindowContext* ctx = new RasterWindowContext_xlib(info.fDisplay, info.fWindow, params);
     if (!ctx->isValid()) {
         delete ctx;
         ctx = nullptr;
     }
     return ctx;
 }
 
 }  // namespace window_context_factory
 }  // namespace sk_app