submodule/skia/docs/examples/ImageInfo_makeWH.cpp

   1 // Copyright 2019 Google LLC.
   2 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
   3 #include "tools/fiddle/examples.h"
   4 // HASH=cd203a3f9c5fb68272f21f302dd54fbc
   5 REG_FIDDLE(ImageInfo_makeWH, 256, 144, false, 3) {
   6 void draw(SkCanvas* canvas) {
   7     SkImageInfo canvasImageInfo = canvas->imageInfo();
   8     SkRect canvasBounds = SkRect::Make(canvasImageInfo.bounds());
   9     canvas->drawImageRect(image, SkRect::Make(source.bounds()), canvasBounds, SkSamplingOptions(),
  10                           nullptr, SkCanvas::kStrict_SrcRectConstraint);
  11     SkImageInfo insetImageInfo =
  12               canvasImageInfo.makeWH(canvasBounds.width() / 2, canvasBounds.height() / 2);
  13     SkBitmap inset;
  14     inset.allocPixels(insetImageInfo);
  15     SkCanvas offscreen(inset);
  16     offscreen.drawImageRect(image, SkRect::Make(source.bounds()), SkRect::Make(inset.bounds()),
  17                             SkSamplingOptions(), nullptr, SkCanvas::kStrict_SrcRectConstraint);
  18     canvas->drawImage(inset.asImage(), canvasBounds.width() / 4, canvasBounds.height() / 4);
  19 }
  20 }  // END FIDDLE