/*
** 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 <errno.h>
#include <string.h>
#include <sys/ioctl.h>
#include <log/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_INTERNAL_CALL
#undef CALL_GL_API_INTERNAL_SET_RETURN_VALUE
#undef CALL_GL_API_INTERNAL_DO_RETURN
#undef CALL_GL_API_RETURN
#if USE_SLOW_BINDING
#define API_ENTRY(_api) _api
#define CALL_GL_API_INTERNAL_CALL(_api, ...) \
gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
if (_c) return _c->_api(__VA_ARGS__);
#define CALL_GL_API_INTERNAL_SET_RETURN_VALUE return 0;
// This stays blank, since void functions will implicitly return, and
// all of the other functions will return 0 based on the previous macro.
#define CALL_GL_API_INTERNAL_DO_RETURN
#elif defined(__arm__)
#define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n"
#define API_ENTRY(_api) __attribute__((naked,noinline)) _api
#define CALL_GL_API_INTERNAL_CALL(_api, ...) \
asm volatile( \
GET_TLS(r12) \
"ldr r12, [r12, %[tls]] \n" \
"cmp r12, #0 \n" \
"ldrne pc, [r12, %[api]] \n" \
: \
: [tls] "J"(TLS_SLOT_OPENGL_API*4), \
[api] "J"(__builtin_offsetof(gl_hooks_t, gl._api)) \
: "r0", "r1", "r2", "r3", "r12" \
);
#define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
asm volatile( \
"mov r0, #0 \n" \
: \
: \
: "r0" \
);
#define CALL_GL_API_INTERNAL_DO_RETURN \
asm volatile( \
"bx lr \n" \
: \
: \
: "r0" \
);
#elif defined(__aarch64__)
#define API_ENTRY(_api) __attribute__((naked,noinline)) _api
#define CALL_GL_API_INTERNAL_CALL(_api, ...) \
asm volatile( \
"mrs x16, tpidr_el0\n" \
"ldr x16, [x16, %[tls]]\n" \
"cbz x16, 1f\n" \
"ldr x16, [x16, %[api]]\n" \
"br x16\n" \
"1:\n" \
: \
: [tls] "i" (TLS_SLOT_OPENGL_API * sizeof(void*)), \
[api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
: "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x16" \
);
#define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
asm volatile( \
"mov w0, wzr \n" \
: \
: \
: "w0" \
);
#define CALL_GL_API_INTERNAL_DO_RETURN \
asm volatile( \
"ret \n" \
: \
: \
: \
);
#elif defined(__i386__)
#define API_ENTRY(_api) __attribute__((naked,noinline)) _api
#define CALL_GL_API_INTERNAL_CALL(_api, ...) \
__asm__ volatile( \
"mov %%gs:0, %%eax\n" \
"mov %P[tls](%%eax), %%eax\n" \
"test %%eax, %%eax\n" \
"je 1f\n" \
"jmp *%P[api](%%eax)\n" \
"1:\n" \
: \
: [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \
[api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
: "cc", "%eax" \
);
#define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
__asm__ volatile( \
"xor %%eax, %%eax\n" \
: \
: \
: "%eax" \
);
#define CALL_GL_API_INTERNAL_DO_RETURN \
__asm__ volatile( \
"ret\n" \
: \
: \
: \
);
#elif defined(__x86_64__)
#define API_ENTRY(_api) __attribute__((naked,noinline)) _api
#define CALL_GL_API_INTERNAL_CALL(_api, ...) \
__asm__ volatile( \
"mov %%fs:0, %%rax\n" \
"mov %P[tls](%%rax), %%rax\n" \
"test %%rax, %%rax\n" \
"je 1f\n" \
"jmp *%P[api](%%rax)\n" \
"1:\n" \
: \
: [tls] "i" (TLS_SLOT_OPENGL_API*sizeof(void*)), \
[api] "i" (__builtin_offsetof(gl_hooks_t, gl._api)) \
: "cc", "%rdi", "%rsi", "%rdx", "%rcx", "%r8", "%r9", \
"%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", \
"%xmm6", "%xmm7" \
);
#define CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
__asm__ volatile( \
"xor %%eax, %%eax\n" \
: \
: \
: "%eax" \
);
#define CALL_GL_API_INTERNAL_DO_RETURN \
__asm__ volatile( \
"retq\n" \
: \
: \
: \
);
#elif defined(__mips64)
#define API_ENTRY(_api) __attribute__((naked,noinline)) _api
// t0: $12
// fn: $25
// tls: $3
// v0: $2
#define CALL_GL_API_INTERNAL_CALL(_api, ...) \
asm volatile( \
".set push\n\t" \
".set noreorder\n\t" \
"rdhwr $3, $29\n\t" \
"ld $12, %[OPENGL_API]($3)\n\t" \
"beqz $12, 1f\n\t" \
" move $25, $ra\n\t" \
"ld $12, %[API]($12)\n\t" \
"beqz $12, 1f\n\t" \
" nop\n\t" \
"move $25, $12\n\t" \
"1:\n\t" \
"jalr $0, $25\n\t" \
" move $2, $0\n\t" \
".set pop\n\t" \
: \
: [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*sizeof(void*)),\
[API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9", \
"$10", "$11", "$12", "$25" \
);
#define CALL_GL_API_INTERNAL_SET_RETURN_VALUE
#define CALL_GL_API_INTERNAL_DO_RETURN
#elif defined(__mips__)
#define API_ENTRY(_api) __attribute__((naked,noinline)) _api
// t0: $8
// fn: $25
// tls: $3
// v0: $2
#define CALL_GL_API_INTERNAL_CALL(_api, ...) \
asm volatile( \
".set push\n\t" \
".set noreorder\n\t" \
".set mips32r2\n\t" \
"rdhwr $3, $29\n\t" \
"lw $3, %[OPENGL_API]($3)\n\t" \
"beqz $3, 1f\n\t" \
" move $25,$ra\n\t" \
"lw $3, %[API]($3)\n\t" \
"beqz $3, 1f\n\t" \
" nop\n\t" \
"move $25, $3\n\t" \
"1:\n\t" \
"jalr $0, $25\n\t" \
" move $2, $0\n\t" \
".set pop\n\t" \
: \
: [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \
[API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
: "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$25" \
);
#define CALL_GL_API_INTERNAL_SET_RETURN_VALUE
#define CALL_GL_API_INTERNAL_DO_RETURN
#endif
#define CALL_GL_API(_api, ...) \
CALL_GL_API_INTERNAL_CALL(_api, __VA_ARGS__) \
CALL_GL_API_INTERNAL_DO_RETURN
#define CALL_GL_API_RETURN(_api, ...) \
CALL_GL_API_INTERNAL_CALL(_api, __VA_ARGS__) \
CALL_GL_API_INTERNAL_SET_RETURN_VALUE \
CALL_GL_API_INTERNAL_DO_RETURN
extern "C" {
#pragma GCC diagnostic ignored "-Wunused-parameter"
#include "gl2_api.in"
#include "gl2ext_api.in"
#pragma GCC diagnostic warning "-Wunused-parameter"
}
#undef API_ENTRY
#undef CALL_GL_API
#undef CALL_GL_API_INTERNAL_CALL
#undef CALL_GL_API_INTERNAL_SET_RETURN_VALUE
#undef CALL_GL_API_INTERNAL_DO_RETURN
#undef CALL_GL_API_RETURN
/*
* glGetString() and glGetStringi() are special because we expose some
* extensions in the wrapper. Also, wrapping glGetXXX() is required because
* the value returned for GL_NUM_EXTENSIONS may have been altered by the
* injection of the additional extensions.
*/
extern "C" {
const GLubyte * __glGetString(GLenum name);
const GLubyte * __glGetStringi(GLenum name, GLuint index);
void __glGetBooleanv(GLenum pname, GLboolean * data);
void __glGetFloatv(GLenum pname, GLfloat * data);
void __glGetIntegerv(GLenum pname, GLint * data);
void __glGetInteger64v(GLenum pname, GLint64 * data);
}
const GLubyte * glGetString(GLenum name) {
const GLubyte * ret = egl_get_string_for_current_context(name);
if (ret == NULL) {
gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
if(_c) ret = _c->glGetString(name);
}
return ret;
}
const GLubyte * glGetStringi(GLenum name, GLuint index) {
const GLubyte * ret = egl_get_string_for_current_context(name, index);
if (ret == NULL) {
gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
if(_c) ret = _c->glGetStringi(name, index);
}
return ret;
}
void glGetBooleanv(GLenum pname, GLboolean * data) {
if (pname == GL_NUM_EXTENSIONS) {
int num_exts = egl_get_num_extensions_for_current_context();
if (num_exts >= 0) {
*data = num_exts > 0 ? GL_TRUE : GL_FALSE;
return;
}
}
gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
if (_c) _c->glGetBooleanv(pname, data);
}
void glGetFloatv(GLenum pname, GLfloat * data) {
if (pname == GL_NUM_EXTENSIONS) {
int num_exts = egl_get_num_extensions_for_current_context();
if (num_exts >= 0) {
*data = (GLfloat)num_exts;
return;
}
}
gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
if (_c) _c->glGetFloatv(pname, data);
}
void glGetIntegerv(GLenum pname, GLint * data) {
if (pname == GL_NUM_EXTENSIONS) {
int num_exts = egl_get_num_extensions_for_current_context();
if (num_exts >= 0) {
*data = (GLint)num_exts;
return;
}
}
gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
if (_c) _c->glGetIntegerv(pname, data);
}
void glGetInteger64v(GLenum pname, GLint64 * data) {
if (pname == GL_NUM_EXTENSIONS) {
int num_exts = egl_get_num_extensions_for_current_context();
if (num_exts >= 0) {
*data = (GLint64)num_exts;
return;
}
}
gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl;
if (_c) _c->glGetInteger64v(pname, data);
}