xref: /aosp_15_r20/external/skia/docs/examples/Surface_MakeNull.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
1*c8dee2aaSAndroid Build Coastguard Worker // Copyright 2019 Google LLC.
2*c8dee2aaSAndroid Build Coastguard Worker // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3*c8dee2aaSAndroid Build Coastguard Worker #include "tools/fiddle/examples.h"
4*c8dee2aaSAndroid Build Coastguard Worker REG_FIDDLE(Surface_MakeNull, 256, 256, true, 0) {
draw(SkCanvas * canvas)5*c8dee2aaSAndroid Build Coastguard Worker void draw(SkCanvas* canvas) {
6*c8dee2aaSAndroid Build Coastguard Worker     SkDebugf("SkSurfaces::Null(0, 0) %c= nullptr\n", SkSurfaces::Null(0, 0) == nullptr ?
7*c8dee2aaSAndroid Build Coastguard Worker              '=' : '!');
8*c8dee2aaSAndroid Build Coastguard Worker     const int w = 37;
9*c8dee2aaSAndroid Build Coastguard Worker     const int h = 1000;
10*c8dee2aaSAndroid Build Coastguard Worker     auto surf = SkSurfaces::Null(w, h);
11*c8dee2aaSAndroid Build Coastguard Worker     auto nullCanvas = surf->getCanvas();
12*c8dee2aaSAndroid Build Coastguard Worker     nullCanvas->drawPaint(SkPaint());   // does not crash, nothing draws
13*c8dee2aaSAndroid Build Coastguard Worker     SkDebugf("surf->makeImageSnapshot() %c= nullptr\n", surf->makeImageSnapshot() == nullptr ?
14*c8dee2aaSAndroid Build Coastguard Worker             '=' : '!');
15*c8dee2aaSAndroid Build Coastguard Worker }
16*c8dee2aaSAndroid Build Coastguard Worker }  // END FIDDLE
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