submodule/skia/docs/examples/Image_getBackendTexture.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=d093aad721261f421c4bef4a296aab48
   5 REG_FIDDLE(Image_getBackendTexture, 256, 256, false, 3) {
   6 void draw(SkCanvas* canvas) {
   7     SkFont font;
   8     SkPaint paint;
   9
  10     GrRecordingContext* context = canvas->recordingContext();
  11     if (!context) {
  12         canvas->drawString("GPU only!", 20, 40, font, paint);
  13         return;
  14     }
  15     GrDirectContext* direct = context->asDirectContext();
  16     if (!direct) {
  17         canvas->drawString("Direct context only!", 20, 40, font, paint);
  18         return;
  19     }
  20
  21     sk_sp<SkImage> imageFromBackend = SkImage::MakeFromAdoptedTexture(direct,
  22                                                                       backEndTexture,
  23                                                                       kBottomLeft_GrSurfaceOrigin,
  24                                                                       kRGBA_8888_SkColorType,
  25                                                                       kOpaque_SkAlphaType);
  26     GrBackendTexture textureFromImage = imageFromBackend->getBackendTexture(false);
  27     if (!textureFromImage.isValid()) {
  28         return;
  29     }
  30     sk_sp<SkImage> imageFromTexture = SkImage::MakeFromAdoptedTexture(direct,
  31                                                                       textureFromImage,
  32                                                                       kTopLeft_GrSurfaceOrigin,
  33                                                                       kRGBA_8888_SkColorType,
  34                                                                       kOpaque_SkAlphaType);
  35     canvas->drawImage(imageFromTexture, 0, 0);
  36     canvas->drawImage(imageFromBackend, 128, 128);
  37 }
  38 }  // END FIDDLE