add installPixels

src/pdf/SkPDFDevice.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 "SkPDFDevice.h"
 
 #include "SkAnnotation.h"
@@ skipping 2232 matching lines @@
         SkScalar scaleY = physicalPerspectiveOutline.getBounds().height() /
                               bounds.height();
 
         // TODO(edisonn): A better approach would be to use a bitmap shader
         // (in clamp mode) and draw a rect over the entire bounding box. Then
         // intersect perspectiveOutline to the clip. That will avoid introducing
         // alpha to the image while still giving good behavior at the edge of
         // the image.  Avoiding alpha will reduce the pdf size and generation
         // CPU time some.
 
-        perspectiveBitmap.setConfig(
-                SkBitmap::kARGB_8888_Config,
-                SkScalarCeilToInt(
-                        physicalPerspectiveOutline.getBounds().width()),
-                SkScalarCeilToInt(
-                        physicalPerspectiveOutline.getBounds().height()));
-        perspectiveBitmap.allocPixels();
+        const int w = SkScalarCeilToInt(physicalPerspectiveOutline.getBounds().width());
+        const int h = SkScalarCeilToInt(physicalPerspectiveOutline.getBounds().height());
+        if (!perspectiveBitmap.allocPixels(SkImageInfo::MakeN32Premul(w, h))) {
+            return;
+        }
         perspectiveBitmap.eraseColor(SK_ColorTRANSPARENT);
 
         SkBitmapDevice device(perspectiveBitmap);
         SkCanvas canvas(&device);
 
         SkScalar deltaX = bounds.left();
         SkScalar deltaY = bounds.top();
 
         SkMatrix offsetMatrix = origMatrix;
         offsetMatrix.postTranslate(-deltaX, -deltaY);
@@ skipping 58 matching lines @@
 }
 
 bool SkPDFDevice::onReadPixels(const SkBitmap& bitmap, int x, int y,
                                SkCanvas::Config8888) {
     return false;
 }
 
 bool SkPDFDevice::allowImageFilter(SkImageFilter*) {
     return false;
 }