skia2/docs/examples/Pixmap_writable_addr.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
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// 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=74ef460f89ed5904334d0f8883e781c4
REG_FIDDLE(Pixmap_writable_addr, 256, 256, true, 0) {
void draw(SkCanvas* canvas) {
const int w = 4;
const int h = 4;
SkPMColor storage[w * h * 4];
SkPixmap pixmap(SkImageInfo::MakeN32(w, h, kPremul_SkAlphaType), storage, w * 4);
SkDebugf("pixmap.writable_addr() %c= (void *)storage\n",
pixmap.writable_addr() == (void *)storage ? '=' : '!');
pixmap.erase(0x00000000);
*(SkPMColor*)pixmap.writable_addr() = 0xFFFFFFFF;
SkDebugf("pixmap.getColor(0, 1) %c= 0x00000000\n",
pixmap.getColor(0, 1) == 0x00000000 ? '=' : '!');
SkDebugf("pixmap.getColor(0, 0) %c= 0xFFFFFFFF\n",
pixmap.getColor(0, 0) == 0xFFFFFFFF ? '=' : '!');
}
} // END FIDDLE