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