chromium/remoting/client/empty_cursor_filter.cc

// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "remoting/client/empty_cursor_filter.h"

#include <stdint.h>

#include <algorithm>

#include "build/build_config.h"
#include "remoting/proto/control.pb.h"

namespace remoting {

protocol::CursorShapeInfo EmptyCursorShape() { … }

bool IsCursorShapeEmpty(const protocol::CursorShapeInfo& cursor_shape) { … }

EmptyCursorFilter::EmptyCursorFilter(protocol::CursorShapeStub* cursor_stub)
    : … { … }

EmptyCursorFilter::~EmptyCursorFilter() = default;

namespace {

#if defined(ARCH_CPU_LITTLE_ENDIAN)
const uint32_t kPixelAlphaMask = …;
#else  // !defined(ARCH_CPU_LITTLE_ENDIAN)
const uint32_t kPixelAlphaMask = 0x000000ff;
#endif  // !defined(ARCH_CPU_LITTLE_ENDIAN)

// Returns true if |pixel| is not completely transparent.
bool IsVisiblePixel(uint32_t pixel) { … }

// Returns true if there is at least one visible pixel in the given range.
bool IsVisibleRow(const uint32_t* begin, const uint32_t* end) { … }

}  // namespace

void EmptyCursorFilter::SetCursorShape(
    const protocol::CursorShapeInfo& cursor_shape) { … }

}  // namespace remoting