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/*
* Mesa 3-D graphics library
* Version: 7.9
*
* Copyright (C) 2010 LunarG Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Chia-I Wu <olv@lunarg.com>
*/
/*
* This demo tests eglGetProcAddress and glClear.
*/
#include <stdlib.h>
#include <stdio.h>
#include <EGL/egl.h>
#include <GLES/gl.h>
#include "eglut.h"
typedef void (GL_APIENTRY *type_ClearColor)(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
typedef void (GL_APIENTRY *type_Clear)(GLbitfield mask);
static type_ClearColor fn_ClearColor;
static type_Clear fn_Clear;
static void
draw(void)
{
fn_Clear(GL_COLOR_BUFFER_BIT);
}
static void *
get_proc(const char *name)
{
void *proc;
proc = (void *) eglGetProcAddress(name);
if (!proc) {
/*
* note that eglGetProcAddress is not required to support non-extension
* functions
*/
printf("failed to find %s (not necessarily a bug)\n", name);
exit(1);
}
return proc;
}
static void
init(void)
{
fn_ClearColor = (type_ClearColor) get_proc("glClearColor");
fn_Clear = (type_Clear) get_proc("glClear");
fn_ClearColor(1.0, 0.4, 0.4, 0.0);
}
int
main(int argc, char *argv[])
{
eglutInitWindowSize(300, 300);
eglutInitAPIMask(EGLUT_OPENGL_ES1_BIT);
eglutInit(argc, argv);
eglutCreateWindow("clear");
eglutDisplayFunc(draw);
init();
eglutMainLoop();
return 0;
}
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