skia2/docs/examples/ImageInfo_minRowBytes.cpp
Greg Kaiser 2f08a4043b examples: Avoid undefined behavior
When 'int' is 32-bits, "1 << 31" is undefined.  So we avoid that
in these couple example programs.

Bug: 8968
Change-Id: Iacaa28bf46a4006de4aee90de33560911744925e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/206691
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
2019-04-08 22:14:49 +00:00

18 lines
728 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 "fiddle/examples.h"
// HASH=897230ecfb36095486beca324fd369f9
REG_FIDDLE(ImageInfo_minRowBytes, 256, 256, true, 0) {
void draw(SkCanvas* canvas) {
for (int shift = 24; shift < 31; ++shift) {
int width = 1 << shift;
SkImageInfo imageInfo =
SkImageInfo::Make(width, 1, kRGBA_F16_SkColorType, kPremul_SkAlphaType);
size_t minRowBytes = imageInfo.minRowBytes();
bool widthTooLarge = !minRowBytes;
SkDebugf("RGBA_F16 width %d (0x%08x) %s\n",
width, width, widthTooLarge ? "too large" : "OK");
}
}
} // END FIDDLE