skia2/docs/examples/Paint_nothingToDraw.cpp
Mike Klein c0bd9f9fe5 rewrite includes to not need so much -Ifoo
Current strategy: everything from the top

Things to look at first are the manual changes:

   - added tools/rewrite_includes.py
   - removed -Idirectives from BUILD.gn
   - various compile.sh simplifications
   - tweak tools/embed_resources.py
   - update gn/find_headers.py to write paths from the top
   - update gn/gn_to_bp.py SkUserConfig.h layout
     so that #include "include/config/SkUserConfig.h" always
     gets the header we want.

No-Presubmit: true
Change-Id: I73a4b181654e0e38d229bc456c0d0854bae3363e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209706
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
2019-04-24 16:27:11 +00:00

21 lines
770 B
C++

// Copyright 2019 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#include "tools/fiddle/examples.h"
// HASH=2973b05bfbb6b4c29332c8ac4fcf3995
REG_FIDDLE(Paint_nothingToDraw, 256, 256, true, 0) {
void draw(SkCanvas* canvas) {
auto debugster = [](const char* prefix, const SkPaint& p) -> void {
SkDebugf("%s nothing to draw: %s\n", prefix,
p.nothingToDraw() ? "true" : "false");
};
SkPaint paint;
debugster("initial", paint);
paint.setBlendMode(SkBlendMode::kDst);
debugster("blend dst", paint);
paint.setBlendMode(SkBlendMode::kSrcOver);
debugster("blend src over", paint);
paint.setAlpha(0);
debugster("alpha 0", paint);
}
} // END FIDDLE