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=6de6f3ef699a72ff26da1b26b23a3316
5 REG_FIDDLE(Surface_characterize, 256, 64, false, 0) {
draw(SkCanvas * canvas)6 void draw(SkCanvas* canvas) {
7 SkFont font(nullptr, 32);
8 SkPaint paint;
9 auto context = canvas->recordingContext();
10 if (!context) {
11 canvas->drawString("GPU only!", 20, 40, font, paint);
12 return;
13 }
14 sk_sp<SkSurface> gpuSurface = SkSurface::MakeRenderTarget(
15 context, skgpu::Budgeted::kYes, SkImageInfo::MakeN32Premul(64, 64));
16 SkSurfaceCharacterization characterization;
17 if (!gpuSurface->characterize(&characterization)) {
18 canvas->drawString("characterization unsupported", 20, 40, font, paint);
19 return;
20 }
21 // start of threadable work
22 SkDeferredDisplayListRecorder recorder(characterization);
23 SkCanvas* subCanvas = recorder.getCanvas();
24 subCanvas->clear(SK_ColorGREEN);
25 sk_sp<SkDeferredDisplayList> displayList = recorder.detach();
26 // end of threadable work
27 gpuSurface->draw(displayList);
28 sk_sp<SkImage> img = gpuSurface->makeImageSnapshot();
29 canvas->drawImage(std::move(img), 0, 0);
30 }
31 } // END FIDDLE
32