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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <algorithm>
#include "base/check_op.h"
#include "content/common/cursors/webcursor.h"
#include "ui/display/screen.h"
namespace content {
void WebCursor::UpdateDisplayInfoForWindow(aura::Window* window) {
display::Display display =
display::Screen::GetScreen()->GetDisplayNearestWindow(window);
if (rotation_ == display.panel_rotation() &&
device_scale_factor_ == display.device_scale_factor() &&
maximum_cursor_size_ == display.maximum_cursor_size())
return;
device_scale_factor_ = display.device_scale_factor();
// The cursor should use the panel's physical rotation instead of
// rotation. They can be different on ChromeOS but the same on
// other platforms.
rotation_ = display.panel_rotation();
maximum_cursor_size_ = display.maximum_cursor_size();
// TODO(oshima): Identify if it's possible to remove this check here and move
// the kDefaultMaxSize constants to a single place. crbug.com/603512
if (maximum_cursor_size_.width() == 0 || maximum_cursor_size_.height() == 0)
maximum_cursor_size_ = gfx::Size(kDefaultMaxSize, kDefaultMaxSize);
custom_cursor_.reset();
}
float WebCursor::GetCursorScaleFactor(SkBitmap* bitmap) {
DCHECK_LT(0, maximum_cursor_size_.width());
DCHECK_LT(0, maximum_cursor_size_.height());
return std::min(
{device_scale_factor_ / cursor_.image_scale_factor(),
static_cast<float>(maximum_cursor_size_.width()) / bitmap->width(),
static_cast<float>(maximum_cursor_size_.height()) / bitmap->height()});
}
} // namespace content
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