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/*
* Trivial GL demo; flashes the screen. Showing how simple life is with eglapp.
*
* Copyright © 2013 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Daniel van Vugt <daniel.van.vugt@canonical.com>
*/
#include "eglapp.h"
#include <stdio.h>
#include <unistd.h>
#include <GLES2/gl2.h>
typedef struct Color
{
GLfloat r, g, b, a;
} Color;
int main(int argc, char *argv[])
{
unsigned int width = 0, height = 0;
if (!mir_eglapp_init(argc, argv, &width, &height))
return 1;
float const opacity = mir_eglapp_background_opacity;
Color red = {opacity, 0.0f, 0.0f, opacity};
Color green = {0.0f, opacity, 0.0f, opacity};
Color blue = {0.0f, 0.0f, opacity, opacity};
/* This is probably the simplest GL you can do */
while (mir_eglapp_running())
{
glClearColor(red.r, red.g, red.b, red.a);
glClear(GL_COLOR_BUFFER_BIT);
mir_eglapp_swap_buffers();
sleep(1);
glClearColor(green.r, green.g, green.b, green.a);
glClear(GL_COLOR_BUFFER_BIT);
mir_eglapp_swap_buffers();
sleep(1);
glClearColor(blue.r, blue.g, blue.b, blue.a);
glClear(GL_COLOR_BUFFER_BIT);
mir_eglapp_swap_buffers();
sleep(1);
}
mir_eglapp_shutdown();
return 0;
}
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