From 63227ca63b09ad534b52b1b1957202ab18aa53f7 Mon Sep 17 00:00:00 2001 From: Mike Reed Date: Tue, 30 Jan 2018 10:12:22 -0500 Subject: handle clipping large triangles originally found by fuzzer. Bug: skia: Change-Id: I45007a619f13936153c0db8a60b3631a2c9db20c Reviewed-on: https://skia-review.googlesource.com/101741 Reviewed-by: Cary Clark Commit-Queue: Mike Reed --- tools/sk_pixel_iter.h | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 tools/sk_pixel_iter.h (limited to 'tools/sk_pixel_iter.h') diff --git a/tools/sk_pixel_iter.h b/tools/sk_pixel_iter.h new file mode 100644 index 0000000000..8bf5a55647 --- /dev/null +++ b/tools/sk_pixel_iter.h @@ -0,0 +1,61 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef sk_pixel_iter_DEFINED +#define sk_pixel_iter_DEFINED + +#include "SkPixmap.h" +#include "SkSurface.h" + +namespace sk_tool_utils { + + class PixelIter { + public: + PixelIter(); + PixelIter(SkSurface* surf) { + SkPixmap pm; + if (!surf->peekPixels(&pm)) { + pm.reset(); + } + this->reset(pm); + } + + void reset(const SkPixmap& pm) { + fPM = pm; + fLoc = { -1, 0 }; + } + + void* next(SkIPoint* loc = nullptr) { + if (!fPM.addr()) { + return nullptr; + } + fLoc.fX += 1; + if (fLoc.fX >= fPM.width()) { + fLoc.fX = 0; + if (++fLoc.fY >= fPM.height()) { + this->setDone(); + return nullptr; + } + } + if (loc) { + *loc = fLoc; + } + return fPM.writable_addr(fLoc.fX, fLoc.fY); + } + + void setDone() { + fPM.reset(); + } + + private: + SkPixmap fPM; + SkIPoint fLoc; + }; + +} // namespace sk_tool_utils + +#endif // sk_tool_utils_DEFINED -- cgit v1.2.3