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/*
* Copyright (c) 2009-2012, 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 <algorithm>
using namespace math;
struct ScreenReader{
GdkPixbuf *pixbuf;
int max_size;
GdkScreen *screen;
Rect2<int> read_area;
};
struct ScreenReader* screen_reader_new(){
struct ScreenReader* screen = new struct ScreenReader;
screen->max_size = 150;
screen->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8, 150, 150);
screen->screen = NULL;
return screen;
}
void screen_reader_destroy(struct ScreenReader *screen) {
if (screen->pixbuf) g_object_unref(screen->pixbuf);
delete screen;
}
void screen_reader_add_rect(struct 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(struct ScreenReader *screen){
screen->read_area = Rect2<int>();
screen->screen = NULL;
}
void screen_reader_update_pixbuf(struct ScreenReader *screen, Rect2<int>* update_rect){
if (!screen->screen) return;
GdkWindow* root_window = gdk_screen_get_root_window(screen->screen);
GdkColormap* colormap = gdk_screen_get_system_colormap(screen->screen);
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->pixbuf) g_object_unref(screen->pixbuf);
screen->max_size = (std::max(width, height) / 150 + 1) * 150;
screen->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8, screen->max_size, screen->max_size);
}
gdk_pixbuf_get_from_drawable(screen->pixbuf, root_window, colormap, left, top, 0, 0, width, height);
*update_rect = screen->read_area;
}
GdkPixbuf* screen_reader_get_pixbuf(struct ScreenReader *screen){
return screen->pixbuf;
}
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