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/*
* Copyright © 2014 Intel Corporation
*
* 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 (including the next
* paragraph) 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.
*/
/**
* @file egl_without_glx.c
*
* Tries to test operation of the library on a GL stack with EGL and
* GLES but no GLX or desktop GL (such as Arm's Mali GLES3 drivers).
* This test is varied by the GLES_VERSION defined at compile time to
* test either a GLES1-only or a GLES2-only system.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <err.h>
#include <dlfcn.h>
#include "epoxy/gl.h"
#include "epoxy/egl.h"
#include "egl_common.h"
/**
* Wraps the system dlopen(), which libepoxy will end up calling when
* it tries to dlopen() the API libraries, and errors out the
* libraries we're trying to simulate not being installed on the
* system.
*/
void *
dlopen(const char *filename, int flag)
{
void * (*dlopen_unwrapped)(const char *filename, int flag);
if (!strcmp(filename, "libGL.so.1"))
return NULL;
#if GLES_VERSION == 2
if (!strcmp(filename, "libGLESv1_CM.so.1"))
return NULL;
#else
if (!strcmp(filename, "libGLESv2.so.2"))
return NULL;
#endif
dlopen_unwrapped = dlsym(RTLD_NEXT, "dlopen");
assert(dlopen_unwrapped);
return dlopen_unwrapped(filename, flag);
}
static EGLenum last_api;
static EGLenum extra_error = EGL_SUCCESS;
/**
* Override of the real libEGL's eglBindAPI to simulate the target
* system's eglBindAPI.
*/
static EGLBoolean
override_eglBindAPI(EGLenum api)
{
void *egl = dlopen("libEGL.so.1", RTLD_LAZY | RTLD_LOCAL);
EGLBoolean (*real_eglBindAPI)(EGLenum api) = dlsym(egl, "eglBindAPI");
last_api = api;
if (api == EGL_OPENGL_API) {
extra_error = EGL_BAD_PARAMETER;
return EGL_FALSE;
}
assert(real_eglBindAPI);
return real_eglBindAPI(api);
}
/**
* Override of the real libEGL's eglGetError() to feed back the error
* that might have been generated by override_eglBindAPI().
*/
static EGLint
override_eglGetError(void)
{
void *egl = dlopen("libEGL.so.1", RTLD_LAZY | RTLD_LOCAL);
EGLint (*real_eglGetError)(void) = dlsym(egl, "eglGetError");
if (extra_error != EGL_SUCCESS) {
EGLenum error = extra_error;
extra_error = EGL_SUCCESS;
return error;
}
assert(real_eglGetError);
return real_eglGetError();
}
int
main(int argc, char **argv)
{
bool pass = true;
EGLDisplay *dpy = get_egl_display_or_skip();
EGLint context_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, GLES_VERSION,
EGL_NONE
};
EGLConfig cfg;
EGLint config_attribs[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RED_SIZE, 1,
EGL_GREEN_SIZE, 1,
EGL_BLUE_SIZE, 1,
EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
EGL_NONE
};
EGLint count;
EGLContext ctx;
const unsigned char *string;
epoxy_eglBindAPI = override_eglBindAPI;
epoxy_eglGetError = override_eglGetError;
if (!epoxy_has_egl_extension(dpy, "EGL_KHR_surfaceless_context"))
errx(77, "Test requires EGL_KHR_surfaceless_context");
eglBindAPI(EGL_OPENGL_ES_API);
if (!eglChooseConfig(dpy, config_attribs, &cfg, 1, &count))
errx(77, "Couldn't get an EGLConfig\n");
ctx = eglCreateContext(dpy, cfg, NULL, context_attribs);
if (!ctx)
errx(77, "Couldn't create a GLES%d context\n", GLES_VERSION);
eglMakeCurrent(dpy, NULL, NULL, ctx);
string = glGetString(GL_VERSION);
printf("GL_VERSION: %s\n", string);
assert(eglGetError() == EGL_SUCCESS);
return pass != true;
}
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