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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.
*/
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <cutils/log.h>
#include <cutils/properties.h>
#include "hooks.h"
#include "egl_impl.h"
using namespace android;
// ----------------------------------------------------------------------------
// Actual GL entry-points
// ----------------------------------------------------------------------------
#undef API_ENTRY
#undef CALL_GL_API
#undef CALL_GL_API_RETURN
#define DEBUG_CALL_GL_API 0
#if USE_FAST_TLS_KEY
#ifdef HAVE_ARM_TLS_REGISTER
#define GET_TLS(reg) \
"mrc p15, 0, " #reg ", c13, c0, 3 \n"
#else
#define GET_TLS(reg) \
"mov " #reg ", #0xFFFF0FFF \n" \
"ldr " #reg ", [" #reg ", #-15] \n"
#endif
#define API_ENTRY(_api) __attribute__((naked)) _api
#define CALL_GL_API(_api, ...) \
asm volatile( \
GET_TLS(r12) \
"ldr r12, [r12, %[tls]] \n" \
"cmp r12, #0 \n" \
"ldrne pc, [r12, %[api]] \n" \
"mov r0, #0 \n" \
"bx lr \n" \
: \
: [tls] "J"(TLS_SLOT_OPENGL_API*4), \
[api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \
: \
);
#define CALL_GL_API_RETURN(_api, ...) \
CALL_GL_API(_api, __VA_ARGS__) \
return 0; // placate gcc's warnings. never reached.
#else
#define API_ENTRY(_api) _api
#if DEBUG_CALL_GL_API
#define CALL_GL_API(_api, ...) \
gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
_c->_api(__VA_ARGS__); \
GLenum status = GL_NO_ERROR; \
while ((status = glGetError()) != GL_NO_ERROR) { \
ALOGD("[" #_api "] 0x%x", status); \
}
#else
#define CALL_GL_API(_api, ...) \
gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
_c->_api(__VA_ARGS__);
#endif
#define CALL_GL_API_RETURN(_api, ...) \
gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
return _c->_api(__VA_ARGS__)
#endif
extern "C" {
#include "gl2_api.in"
#include "gl2ext_api.in"
}
#undef API_ENTRY
#undef CALL_GL_API
#undef CALL_GL_API_RETURN
/*
* glGetString() is special because we expose some extensions in the wrapper
*/
extern "C" const GLubyte * __glGetString(GLenum name);
const GLubyte * glGetString(GLenum name)
{
const GLubyte * ret = egl_get_string_for_current_context(name);
if (ret == NULL) {
ret = __glGetString(name);
}
return ret;
}
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