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/* Copyright 2012 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.
*/
#include "piglit-util-gl.h"
#if defined(_WIN32)
#elif defined(__APPLE__)
#include <stdlib.h>
#include <string.h>
#include <AvailabilityMacros.h>
#include <dlfcn.h>
#else /* Linux */
#if defined(PIGLIT_HAS_GLX)
# include "glxew.h"
#elif defined(PIGLIT_HAS_EGL)
# include <EGL/egl.h>
#endif
#endif
/**
* Generated code calls this function if the test tries to use a GL
* function that is not supported on the current implementation.
*
* This function terminates the test with a SKIP; this saves the
* piglit test from the burden of having to pre-check whether the
* implementation supports the functionality being tested.
*/
static void
default_unsupported(const char *name)
{
printf("Function \"%s\" not supported on this implementation\n", name);
piglit_report_result(PIGLIT_SKIP);
}
/**
* Generated code calls this function if a call to GetProcAddress()
* returns NULL.
*
* We don't expect this to ever happen, since we only call
* GetProcAddress() for functions that the implementation claims to
* support. So if it does happen we terminate the test with a FAIL.
*/
static void
default_get_proc_address_failure(const char *function_name)
{
printf("GetProcAddress failed for \"%s\"\n", function_name);
piglit_report_result(PIGLIT_FAIL);
}
#if defined(_WIN32)
/**
* This function is used to retrieve the address of GL extension
* functions, and core GL functions for GL versions above 1.3, on
* Windows.
*/
static piglit_dispatch_function_ptr
get_ext_proc_address(const char *function_name)
{
return (piglit_dispatch_function_ptr) wglGetProcAddress(function_name);
}
/**
* This function is used to retrieve the address of core GL functions
* on windows.
*/
static piglit_dispatch_function_ptr
get_core_proc_address(const char *function_name, int gl_10x_version)
{
if (gl_10x_version > 11) {
return get_ext_proc_address(function_name);
} else {
piglit_dispatch_function_ptr p;
/* Try GetProcAddress() first.
* If that fails, try wglGetProcAddress().
*/
p = (piglit_dispatch_function_ptr)
GetProcAddress(LoadLibraryA("OPENGL32"), function_name);
if (!p)
p = get_ext_proc_address(function_name);
return p;
}
}
#elif defined(__APPLE__)
/**
* This function is used to retrieve the address of all GL functions
* on Apple.
*/
static piglit_dispatch_function_ptr
get_ext_proc_address(const char *function_name)
{
static const char *opengl_path =
"/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL";
static void *opengl_lib = NULL;
/* Dynamically load lib */
if (!opengl_lib)
{
opengl_lib = dlopen(opengl_path, RTLD_LAZY);
if (!opengl_lib)
return NULL;
}
return (piglit_dispatch_function_ptr) dlsym(opengl_lib, function_name);
}
/**
* This function is used to retrieve the address of core GL functions
* on Apple.
*/
static piglit_dispatch_function_ptr
get_core_proc_address(const char *function_name, int gl_10x_version)
{
/* We don't need to worry about the GL version, since on Apple
* we retrieve all proc addresses in the same way.
*/
(void) gl_10x_version;
return get_ext_proc_address(function_name);
}
#else /* Linux */
/**
* This function is used to retrieve the address of all GL functions
* on Linux.
*/
static piglit_dispatch_function_ptr
get_ext_proc_address(const char *function_name)
{
#if defined(PIGLIT_HAS_GLX)
return glXGetProcAddressARB((const GLubyte *) function_name);
#elif defined(PIGLIT_HAS_EGL)
return eglGetProcAddress(function_name);
#else
(void)function_name;
return (piglit_dispatch_function_ptr)NULL;
#endif
}
/**
* This function is used to retrieve the address of core GL functions
* on Linux.
*/
static piglit_dispatch_function_ptr
get_core_proc_address(const char *function_name, int gl_10x_version)
{
/* We don't need to worry about the GL version, since on Apple
* we retrieve all proc addresses in the same way.
*/
(void) gl_10x_version;
return get_ext_proc_address(function_name);
}
#endif
/**
* Initialize the GL dispatch mechanism to a default configuration.
*
* Eventually we will want to replace this with code that initializes
* the GL dispatch mechanism based on run-time parameters (e.g. to
* select X vs Wayland, or desktop GL vs GLES).
*
* This function is safe to call multiple times--it only has an effect
* on the first call.
*/
void
piglit_dispatch_default_init(piglit_dispatch_api api)
{
static bool already_initialized = false;
if (already_initialized)
return;
piglit_dispatch_init(api,
get_core_proc_address,
get_ext_proc_address,
default_unsupported,
default_get_proc_address_failure);
already_initialized = true;
}
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