add SkCanvas constructor that explicitly creates no_config with dimensions

src/core/SkCanvas.cpp

 
 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkCanvas.h"
@@ skipping 487 matching lines @@
     fMCRec->fLayer = SkNEW_ARGS(DeviceCM, (NULL, 0, 0, NULL, NULL));
     fMCRec->fTopLayer = fMCRec->fLayer;
     fMCRec->fNext = NULL;
 
     fSurfaceBase = NULL;
 
     return this->setDevice(device);
 }
 
 SkCanvas::SkCanvas()
-: fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) {
+    : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage))
+{
     inc_canvas();
-
+    
     this->init(NULL);
 }
 
+SkCanvas::SkCanvas(int width, int height)
+    : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage))
+{
+    inc_canvas();
+    
+    SkBitmap bitmap;
+    bitmap.setConfig(SkBitmap::kNo_Config, width, height);
+    this->init(SkNEW_ARGS(SkBitmapDevice, (bitmap)))->unref();
+}
+
 SkCanvas::SkCanvas(SkBaseDevice* device)
-        : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) {
+    : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage))
+{
     inc_canvas();
 
     this->init(device);
 }
 
 SkCanvas::SkCanvas(const SkBitmap& bitmap)
-        : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) {
+    : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage))
+{
     inc_canvas();
 
     this->init(SkNEW_ARGS(SkBitmapDevice, (bitmap)))->unref();
 }
 
 SkCanvas::~SkCanvas() {
     // free up the contents of our deque
     this->restoreToCount(1);    // restore everything but the last
     SkASSERT(0 == fSaveLayerCount);
 
@@ skipping 1672 matching lines @@
     return *paint;
 }
 
 const SkRegion& SkCanvas::LayerIter::clip() const { return fImpl->getClip(); }
 int SkCanvas::LayerIter::x() const { return fImpl->getX(); }
 int SkCanvas::LayerIter::y() const { return fImpl->getY(); }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 SkCanvas::ClipVisitor::~ClipVisitor() { }