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/*
* Copyright (c) 2009-2016, Albertas Vyšniauskas
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
* * Neither the name of the software author nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "ScreenReader.h"
#include "Rect2.h"
#include <gtk/gtk.h>
#if GTK_MAJOR_VERSION >= 3
#define COGL_ENABLE_EXPERIMENTAL_2_0_API
#define CLUTTER_ENABLE_EXPERIMENTAL_API
#include <clutter/clutter.h>
#include <cogl/cogl.h>
#endif
#include <algorithm>
#include <iostream>
using namespace math;
using namespace std;
struct ScreenReader
{
cairo_surface_t *surface;
int max_size;
GdkScreen *screen;
Rect2<int> read_area;
};
struct ScreenReader* screen_reader_new()
{
ScreenReader* screen = new ScreenReader;
screen->max_size = 0;
screen->surface = 0;
screen->screen = 0;
return screen;
}
void screen_reader_destroy(ScreenReader *screen)
{
if (screen->surface) cairo_surface_destroy(screen->surface);
delete screen;
}
void screen_reader_add_rect(ScreenReader *screen, GdkScreen *gdk_screen, Rect2<int>& rect)
{
if (screen->screen && (screen->screen == gdk_screen)){
screen->read_area += rect;
}else{
screen->read_area += rect;
screen->screen = gdk_screen;
}
}
void screen_reader_reset_rect(ScreenReader *screen)
{
screen->read_area = Rect2<int>();
screen->screen = NULL;
}
void screen_reader_update_surface(ScreenReader *screen, Rect2<int>* update_rect)
{
if (!screen->screen) return;
int left = screen->read_area.getX();
int top = screen->read_area.getY();
int width = screen->read_area.getWidth();
int height = screen->read_area.getHeight();
if (width > screen->max_size || height > screen->max_size){
if (screen->surface) cairo_surface_destroy(screen->surface);
screen->max_size = (std::max(width, height) / 150 + 1) * 150;
screen->surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, screen->max_size, screen->max_size);
}
GdkWindow* root_window = gdk_screen_get_root_window(screen->screen);
cairo_t *root_cr = gdk_cairo_create(root_window);
cairo_surface_t *root_surface = cairo_get_target(root_cr);
if (cairo_surface_status(root_surface) != CAIRO_STATUS_SUCCESS){
cerr << "can not get root window surface" << endl;
return;
}
cairo_t *cr = cairo_create(screen->surface);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface(cr, root_surface, -left, -top);
cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_NEAREST);
cairo_rectangle(cr, 0, 0, width, height);
cairo_fill(cr);
cairo_destroy(cr);
cairo_destroy(root_cr);
*update_rect = screen->read_area;
}
cairo_surface_t* screen_reader_get_surface(ScreenReader *screen)
{
return screen->surface;
}
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