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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/cursor/cursor_loader_x11.h"
#include <X11/Xlib.h>
#include <X11/cursorfont.h>
#include "base/logging.h"
#include "grit/ui_resources.h"
#include "ui/base/cursor/cursor.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/x/x11_util.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/image/image_skia.h"
namespace {
// Returns X font cursor shape from an Aura cursor.
int CursorShapeFromNative(gfx::NativeCursor native_cursor) {
switch (native_cursor.native_type()) {
case ui::kCursorMiddlePanning:
return XC_fleur;
case ui::kCursorEastPanning:
return XC_sb_right_arrow;
case ui::kCursorNorthPanning:
return XC_sb_up_arrow;
case ui::kCursorNorthEastPanning:
return XC_top_right_corner;
case ui::kCursorNorthWestPanning:
return XC_top_left_corner;
case ui::kCursorSouthPanning:
return XC_sb_down_arrow;
case ui::kCursorSouthEastPanning:
return XC_bottom_right_corner;
case ui::kCursorSouthWestPanning:
return XC_bottom_left_corner;
case ui::kCursorWestPanning:
return XC_sb_left_arrow;
case ui::kCursorNone:
case ui::kCursorGrab:
case ui::kCursorGrabbing:
// TODO(jamescook): Need cursors for these. crbug.com/111650
return XC_left_ptr;
case ui::kCursorNull:
case ui::kCursorPointer:
case ui::kCursorNoDrop:
case ui::kCursorNotAllowed:
case ui::kCursorCopy:
case ui::kCursorMove:
case ui::kCursorEastResize:
case ui::kCursorNorthResize:
case ui::kCursorSouthResize:
case ui::kCursorWestResize:
case ui::kCursorNorthEastResize:
case ui::kCursorNorthWestResize:
case ui::kCursorSouthWestResize:
case ui::kCursorSouthEastResize:
case ui::kCursorIBeam:
case ui::kCursorAlias:
case ui::kCursorCell:
case ui::kCursorContextMenu:
case ui::kCursorCross:
case ui::kCursorHelp:
case ui::kCursorWait:
case ui::kCursorNorthSouthResize:
case ui::kCursorEastWestResize:
case ui::kCursorNorthEastSouthWestResize:
case ui::kCursorNorthWestSouthEastResize:
case ui::kCursorProgress:
case ui::kCursorColumnResize:
case ui::kCursorRowResize:
case ui::kCursorVerticalText:
case ui::kCursorZoomIn:
case ui::kCursorZoomOut:
NOTREACHED() << "Cursor (" << native_cursor.native_type() << ") should "
<< "have an image asset.";
return XC_left_ptr;
case ui::kCursorCustom:
NOTREACHED();
return XC_left_ptr;
}
NOTREACHED();
return XC_left_ptr;
}
} // namespace
namespace ui {
CursorLoader* CursorLoader::Create() {
return new CursorLoaderX11;
}
CursorLoaderX11::CursorLoaderX11() {
}
CursorLoaderX11::~CursorLoaderX11() {
UnloadAll();
// Clears XCursorCache.
ui::GetXCursor(ui::kCursorClearXCursorCache);
}
void CursorLoaderX11::LoadImageCursor(int id,
int resource_id,
const gfx::Point& hot) {
const gfx::ImageSkia* image =
ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id);
const gfx::ImageSkiaRep& image_rep = image->GetRepresentation(
ui::GetScaleFactorFromScale(device_scale_factor()));
XcursorImage* x_image =
ui::SkBitmapToXcursorImage(&image_rep.sk_bitmap(), hot);
cursors_[id] = ui::CreateReffedCustomXCursor(x_image);
// |image_rep| is owned by the resource bundle. So we do not need to free it.
}
void CursorLoaderX11::LoadAnimatedCursor(int id,
int resource_id,
const gfx::Point& hot,
int frame_delay_ms) {
const gfx::ImageSkia* image =
ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id);
const gfx::ImageSkiaRep& image_rep = image->GetRepresentation(
ui::GetScaleFactorFromScale(device_scale_factor()));
const SkBitmap bitmap = image_rep.sk_bitmap();
DCHECK_EQ(bitmap.config(), SkBitmap::kARGB_8888_Config);
int frame_width = bitmap.height();
int frame_height = frame_width;
int total_width = bitmap.width();
DCHECK_EQ(total_width % frame_width, 0);
int frame_count = total_width / frame_width;
DCHECK_GT(frame_count, 0);
XcursorImages* x_images = XcursorImagesCreate(frame_count);
x_images->nimage = frame_count;
bitmap.lockPixels();
unsigned int* pixels = bitmap.getAddr32(0, 0);
// Create each frame.
for (int frame = 0; frame < frame_count; ++frame) {
XcursorImage* x_image = XcursorImageCreate(frame_width, frame_height);
for (int row = 0; row < frame_height; ++row) {
// Copy |row|'th row of |frame|'th frame.
memcpy(x_image->pixels + row * frame_width,
pixels + frame * frame_width + row * total_width,
frame_width * 4);
}
x_image->xhot = hot.x();
x_image->yhot = hot.y();
x_image->delay = frame_delay_ms;
x_images->images[frame] = x_image;
}
bitmap.unlockPixels();
animated_cursors_[id] = std::make_pair(
XcursorImagesLoadCursor(ui::GetXDisplay(), x_images), x_images);
// |bitmap| is owned by the resource bundle. So we do not need to free it.
}
void CursorLoaderX11::UnloadAll() {
for (ImageCursorMap::const_iterator it = cursors_.begin();
it != cursors_.end(); ++it)
ui::UnrefCustomXCursor(it->second);
// Free animated cursors and images.
for (AnimatedCursorMap::iterator it = animated_cursors_.begin();
it != animated_cursors_.end(); ++it) {
XcursorImagesDestroy(it->second.second); // also frees individual frames.
XFreeCursor(ui::GetXDisplay(), it->second.first);
}
}
void CursorLoaderX11::SetPlatformCursor(gfx::NativeCursor* cursor) {
DCHECK(cursor);
::Cursor xcursor;
if (IsImageCursor(*cursor))
xcursor = ImageCursorFromNative(*cursor);
else if (*cursor == ui::kCursorCustom)
xcursor = cursor->platform();
else if (device_scale_factor() == 1.0f)
xcursor = ui::GetXCursor(CursorShapeFromNative(*cursor));
else
xcursor = ImageCursorFromNative(ui::kCursorPointer);
cursor->SetPlatformCursor(xcursor);
}
bool CursorLoaderX11::IsImageCursor(gfx::NativeCursor native_cursor) {
int type = native_cursor.native_type();
return cursors_.count(type) || animated_cursors_.count(type);
}
::Cursor CursorLoaderX11::ImageCursorFromNative(
gfx::NativeCursor native_cursor) {
int type = native_cursor.native_type();
if (animated_cursors_.count(type))
return animated_cursors_[type].first;
DCHECK(cursors_.find(type) != cursors_.end());
return cursors_[type];
}
}
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