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/*
** Copyright 2007, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#ifndef ANDROID_GLES_CM_HOOKS_H
#define ANDROID_GLES_CM_HOOKS_H
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES/gl.h>
#include <GLES/glext.h>
#if !defined(__arm__)
#define USE_SLOW_BINDING 1
#else
#define USE_SLOW_BINDING 0
#endif
#undef NELEM
#define NELEM(x) (sizeof(x)/sizeof(*(x)))
#define MAX_NUMBER_OF_GL_EXTENSIONS 32
#if defined(HAVE_ANDROID_OS) && !USE_SLOW_BINDING && __OPTIMIZE__
#define USE_FAST_TLS_KEY 1
#else
#define USE_FAST_TLS_KEY 0
#endif
#if USE_FAST_TLS_KEY
# include <bionic_tls.h> /* special private C library header */
#endif
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
// EGLDisplay are global, not attached to a given thread
const unsigned int NUM_DISPLAYS = 1;
enum {
IMPL_HARDWARE = 0,
IMPL_SOFTWARE,
IMPL_NUM_DRIVERS_IMPLEMENTATIONS,
IMPL_CONTEXT_LOST = IMPL_NUM_DRIVERS_IMPLEMENTATIONS,
IMPL_NO_CONTEXT,
IMPL_NUM_IMPLEMENTATIONS
};
// ----------------------------------------------------------------------------
// GL / EGL hooks
#undef GL_ENTRY
#undef EGL_ENTRY
#define GL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__);
#define EGL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__);
struct gl_hooks_t {
struct gl_t {
#include "gl_entries.in"
#include "glext_entries.in"
} gl;
struct egl_t {
#include "egl_entries.in"
} egl;
struct gl_ext_t {
void (*extensions[MAX_NUMBER_OF_GL_EXTENSIONS])(void);
} ext;
};
#undef GL_ENTRY
#undef EGL_ENTRY
// ----------------------------------------------------------------------------
extern gl_hooks_t gHooks[IMPL_NUM_IMPLEMENTATIONS];
extern pthread_key_t gGLWrapperKey;
#if USE_FAST_TLS_KEY
// We have a dedicated TLS slot in bionic
static inline gl_hooks_t const * volatile * get_tls_hooks() {
volatile void *tls_base = __get_tls();
gl_hooks_t const * volatile * tls_hooks =
reinterpret_cast<gl_hooks_t const * volatile *>(tls_base);
return tls_hooks;
}
static inline void setGlThreadSpecific(gl_hooks_t const *value) {
gl_hooks_t const * volatile * tls_hooks = get_tls_hooks();
tls_hooks[TLS_SLOT_OPENGL_API] = value;
}
static gl_hooks_t const* getGlThreadSpecific() {
gl_hooks_t const * volatile * tls_hooks = get_tls_hooks();
gl_hooks_t const* hooks = tls_hooks[TLS_SLOT_OPENGL_API];
if (hooks) return hooks;
return &gHooks[IMPL_NO_CONTEXT];
}
#else
static inline void setGlThreadSpecific(gl_hooks_t const *value) {
pthread_setspecific(gGLWrapperKey, value);
}
static gl_hooks_t const* getGlThreadSpecific() {
gl_hooks_t const* hooks = static_cast<gl_hooks_t*>(pthread_getspecific(gGLWrapperKey));
if (hooks) return hooks;
return &gHooks[IMPL_NO_CONTEXT];
}
#endif
// ----------------------------------------------------------------------------
}; // namespace android
// ----------------------------------------------------------------------------
#endif /* ANDROID_GLES_CM_HOOKS_H */
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