submodule/skia/docs/examples/Image_MakeFromPicture.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=4aa2879b9e44dfd6648995326d2c4dcf
   5 REG_FIDDLE(Image_MakeFromPicture, 256, 256, false, 0) {
   6 void draw(SkCanvas* canvas) {
   7     SkPaint paint;
   8     SkPictureRecorder recorder;
   9     SkCanvas* recordingCanvas = recorder.beginRecording(50, 50);
  10     for (auto color : { SK_ColorRED, SK_ColorBLUE, 0xff007f00 } ) {
  11         paint.setColor(color);
  12         recordingCanvas->drawRect({10, 10, 30, 40}, paint);
  13         recordingCanvas->translate(10, 10);
  14         recordingCanvas->scale(1.2f, 1.4f);
  15     }
  16     sk_sp<SkPicture> playback = recorder.finishRecordingAsPicture();
  17     int x = 0, y = 0;
  18     for (auto alpha : { 70, 140, 210 } ) {
  19         paint.setAlpha(alpha);
  20         auto srgbColorSpace = SkColorSpace::MakeSRGB();
  21         sk_sp<SkImage> image = SkImage::MakeFromPicture(playback, {50, 50}, nullptr, &paint,
  22                                                         SkImage::BitDepth::kU8, srgbColorSpace);
  23         canvas->drawImage(image, x, y);
  24         x += 70; y += 70;
  25     }
  26 }
  27 }  // END FIDDLE