submodule/skia/docs/examples/Image_isLazyGenerated_b.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=f031c2a53f6a57833dc0127e674553da
   5 REG_FIDDLE(Image_isLazyGenerated_b, 256, 256, false, 5) {
   6 void draw(SkCanvas* canvas) {
   7     auto dContext = GrAsDirectContext(canvas->recordingContext());
   8     if (!dContext) {
   9         return;
  10     }
  11
  12     auto drawImage = [=](sk_sp<SkImage> image, const char* label) -> void {
  13         if (nullptr == image) {
  14             return;
  15         }
  16         SkPaint paint;
  17         paint.setAntiAlias(true);
  18         SkFont font;
  19         canvas->drawImage(image, 0, 0);
  20         canvas->drawString(label, 30, image->height() / 4, font, paint);
  21         canvas->drawString(
  22                 image->isLazyGenerated() ? "is lazily generated" : "not lazily generated",
  23                 20, image->height() * 3 / 4, font, paint);
  24     };
  25     sk_sp<SkImage> bitmapImage(source.asImage());
  26     sk_sp<SkImage> textureImage(SkImage::MakeFromTexture(dContext, backEndTexture,
  27                                                          kTopLeft_GrSurfaceOrigin,
  28                                                          kRGBA_8888_SkColorType,
  29                                                          kOpaque_SkAlphaType, nullptr));
  30     drawImage(image, "image");
  31     canvas->translate(image->width(), 0);
  32     drawImage(bitmapImage, "source");
  33     canvas->translate(-image->width(), image->height());
  34     drawImage(textureImage, "backEndTexture");
  35 }
  36 }  // END FIDDLE