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// Copyright (c) 2011 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/wayland/wayland_cursor.h"
#include <cairo.h>
#include "base/logging.h"
#include "ui/wayland/wayland_display.h"
#include "ui/wayland/wayland_shm_buffer.h"
namespace {
struct PointerImage {
const char* filename;
int hotspot_x, hotspot_y;
};
// TODO(dnicoara) Add more pointer images and fix the path.
const PointerImage kPointerImages[] = {
{"left_ptr.png", 10, 5},
{"hand.png", 10, 5},
};
} // namespace
namespace ui {
WaylandCursor::WaylandCursor(WaylandDisplay* display)
: display_(display),
buffer_(NULL) {
}
WaylandCursor::~WaylandCursor() {
if (buffer_) {
delete buffer_;
buffer_ = NULL;
}
}
void WaylandCursor::ChangeCursor(Type type) {
const PointerImage& ptr = kPointerImages[type];
cairo_surface_t* ptr_surface = cairo_image_surface_create_from_png(
ptr.filename);
if (!ptr_surface) {
LOG(ERROR) << "Failed to create cursor surface";
return;
}
int width = cairo_image_surface_get_width(ptr_surface);
int height = cairo_image_surface_get_height(ptr_surface);
if (buffer_) {
delete buffer_;
buffer_ = NULL;
}
// TODO(dnicoara) There should be a simpler way to create a wl_buffer for
// a cairo surface. Meantime we just copy the contents of the cairo surface
// created from file to the cairo surface created using a shm file.
buffer_ = new WaylandShmBuffer(display_, width, height);
cairo_surface_t* shared_surface = buffer_->data_surface();
cairo_t* cr = cairo_create(shared_surface);
cairo_set_source_surface(cr, ptr_surface, 0, 0);
cairo_rectangle(cr, 0, 0, width, height);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_fill(cr);
display_->SetCursor(buffer_, ptr.hotspot_x, ptr.hotspot_y);
}
} // namespace ui
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