/*
** 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 <GLES/gl.h>
#include <GLES/glext.h>
#include <cutils/log.h>
#include <cutils/properties.h>
#include "../hooks.h"
#include "../egl_impl.h"
using namespace android;
// set this to 1 for crude GL debugging
#define CHECK_FOR_GL_ERRORS 0
// ----------------------------------------------------------------------------
// extensions for the framework
// ----------------------------------------------------------------------------
extern "C" {
GL_API void GL_APIENTRY glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
const GLvoid *ptr, GLsizei count);
GL_API void GL_APIENTRY glNormalPointerBounds(GLenum type, GLsizei stride,
const GLvoid *pointer, GLsizei count);
GL_API void GL_APIENTRY glTexCoordPointerBounds(GLint size, GLenum type,
GLsizei stride, const GLvoid *pointer, GLsizei count);
GL_API void GL_APIENTRY glVertexPointerBounds(GLint size, GLenum type,
GLsizei stride, const GLvoid *pointer, GLsizei count);
GL_API void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
GLsizei stride, const GLvoid *pointer, GLsizei count);
GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type,
GLsizei stride, const GLvoid *pointer, GLsizei count);
GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type,
GLsizei stride, const GLvoid *pointer, GLsizei count);
}
void glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
const GLvoid *ptr, GLsizei count) {
glColorPointer(size, type, stride, ptr);
}
void glNormalPointerBounds(GLenum type, GLsizei stride,
const GLvoid *pointer, GLsizei count) {
glNormalPointer(type, stride, pointer);
}
void glTexCoordPointerBounds(GLint size, GLenum type,
GLsizei stride, const GLvoid *pointer, GLsizei count) {
glTexCoordPointer(size, type, stride, pointer);
}
void glVertexPointerBounds(GLint size, GLenum type,
GLsizei stride, const GLvoid *pointer, GLsizei count) {
glVertexPointer(size, type, stride, pointer);
}
void GL_APIENTRY glPointSizePointerOESBounds(GLenum type,
GLsizei stride, const GLvoid *pointer, GLsizei count) {
glPointSizePointerOES(type, stride, pointer);
}
GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type,
GLsizei stride, const GLvoid *pointer, GLsizei count) {
glMatrixIndexPointerOES(size, type, stride, pointer);
}
GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type,
GLsizei stride, const GLvoid *pointer, GLsizei count) {
glWeightPointerOES(size, type, stride, pointer);
}
// ----------------------------------------------------------------------------
// Actual GL entry-points
// ----------------------------------------------------------------------------
#undef API_ENTRY
#undef CALL_GL_API
#undef CALL_GL_API_RETURN
#if USE_FAST_TLS_KEY && !CHECK_FOR_GL_ERRORS
#if defined(__arm__)
#define GET_TLS(reg) "mrc p15, 0, " #reg ", c13, c0, 3 \n"
#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)) \
: \
);
#elif defined(__mips__)
#define API_ENTRY(_api) __attribute__((noinline)) _api
#define CALL_GL_API(_api, ...) \
register unsigned int _t0 asm("t0"); \
register unsigned int _fn asm("t1"); \
register unsigned int _tls asm("v1"); \
register unsigned int _v0 asm("v0"); \
asm volatile( \
".set push\n\t" \
".set noreorder\n\t" \
".set mips32r2\n\t" \
"rdhwr %[tls], $29\n\t" \
"lw %[t0], %[OPENGL_API](%[tls])\n\t" \
"beqz %[t0], 1f\n\t" \
" move %[fn], $ra\n\t" \
"lw %[fn], %[API](%[t0])\n\t" \
"movz %[fn], $ra, %[fn]\n\t" \
"1:\n\t" \
"j %[fn]\n\t" \
" move %[v0], $0\n\t" \
".set pop\n\t" \
: [fn] "=c"(_fn), \
[tls] "=&r"(_tls), \
[t0] "=&r"(_t0), \
[v0] "=&r"(_v0) \
: [OPENGL_API] "I"(TLS_SLOT_OPENGL_API*4), \
[API] "I"(__builtin_offsetof(gl_hooks_t, gl._api)) \
: \
);
#else
#error Unsupported architecture
#endif
#define CALL_GL_API_RETURN(_api, ...) \
CALL_GL_API(_api, __VA_ARGS__) \
return 0; // placate gcc's warnings. never reached.
#else
#if CHECK_FOR_GL_ERRORS
#define CHECK_GL_ERRORS(_api) \
do { GLint err = glGetError(); \
ALOGE_IF(err != GL_NO_ERROR, "%s failed (0x%04X)", #_api, err); \
} while(false);
#else
#define CHECK_GL_ERRORS(_api) do { } while(false);
#endif
#define API_ENTRY(_api) _api
#define CALL_GL_API(_api, ...) \
gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
_c->_api(__VA_ARGS__); \
CHECK_GL_ERRORS(_api)
#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 "gl_api.in"
#include "glext_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;
}