skia2/docs/examples/Canvas_readPixels_a.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

22 lines
951 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=102d014d7f753db2a9b9ee08893aaf11
REG_FIDDLE(Canvas_readPixels_a, 64, 64, false, 0) {
void draw(SkCanvas* canvas) {
canvas->clear(SK_ColorBLUE);
SkPaint paint;
canvas->drawCircle(32, 32, 28, paint);
SkImageInfo info = SkImageInfo::Make(64, 64, kBGRA_8888_SkColorType, kPremul_SkAlphaType);
sk_sp<SkData> data(SkData::MakeUninitialized(info.minRowBytes() * info.height()));
sk_bzero(data->writable_data(), info.minRowBytes() * info.height());
for (int x : { 32, -32 } ) {
for (int y : { 32, -32 } ) {
canvas->readPixels(info, data->writable_data(), info.minRowBytes(), x, y);
}
}
sk_sp<SkImage> image = SkImage::MakeRasterData(info, data, info.minRowBytes());
canvas->drawImage(image, 0, 0);
}
} // END FIDDLE