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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2008-2014. All Rights Reserved.
*
* 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.
*
* %CopyrightEnd%
*/
#include <stdio.h>
#include <string.h>
#ifndef _WIN32
#include <dlfcn.h>
#else
#include <windows.h>
#endif
#include "wxe_impl.h"
#include "wxe_return.h"
#include "wxe_gl.h"
/* ****************************************************************************
* Opengl context management *
* ****************************************************************************/
int erl_gl_initiated = FALSE;
ErlDrvTermData gl_active = 0;
wxeGLC glc;
typedef void (*WXE_GL_DISPATCH) (int, char *, ErlDrvPort, ErlDrvTermData, char **, int *);
WXE_GL_DISPATCH wxe_gl_dispatch;
#ifdef _WIN32
#define RTLD_LAZY 0
typedef HMODULE DL_LIB_P;
void * dlsym(HMODULE Lib, const char *func) {
void * funcp;
if((funcp = (void *) GetProcAddress(Lib, func)))
return funcp;
else
return (void *) wglGetProcAddress(func);
}
HMODULE dlopen(const char *path, int unused) {
WCHAR * DLL;
int len = MultiByteToWideChar(CP_ACP, 0, path, -1, NULL, 0);
DLL = (WCHAR *) malloc(len * sizeof(WCHAR));
MultiByteToWideChar(CP_ACP, 0, path, -1, DLL, len);
HMODULE lib = LoadLibrary(DLL);
free(DLL);
return lib;
}
void dlclose(HMODULE Lib) {
FreeLibrary(Lib);
}
#else
typedef void * DL_LIB_P;
#endif
void wxe_initOpenGL(wxeReturn *rt, char *bp) {
DL_LIB_P LIBhandle;
int (*init_opengl)(void *);
#ifdef _WIN32
void * erlCallbacks = &WinDynDriverCallbacks;
#else
void * erlCallbacks = NULL;
#endif
if(erl_gl_initiated == FALSE) {
if((LIBhandle = dlopen(bp, RTLD_LAZY))) {
*(void **) (&init_opengl) = dlsym(LIBhandle, "egl_init_opengl");
wxe_gl_dispatch = (WXE_GL_DISPATCH) dlsym(LIBhandle, "egl_dispatch");
if(init_opengl && wxe_gl_dispatch) {
(*init_opengl)(erlCallbacks);
rt->addAtom((char *) "ok");
rt->add(wxString::FromAscii("initiated"));
rt->addTupleCount(2);
erl_gl_initiated = TRUE;
} else {
wxString msg;
msg.Printf(wxT("In library: "));
msg += wxString::FromAscii(bp);
msg += wxT(" functions: ");
if(!init_opengl)
msg += wxT("egl_init_opengl ");
if(!wxe_gl_dispatch)
msg += wxT("egl_dispatch ");
rt->addAtom((char *) "error");
rt->add(msg);
rt->addTupleCount(2);
}
} else {
wxString msg;
msg.Printf(wxT("Could not load dll: "));
msg += wxString::FromAscii(bp);
rt->addAtom((char *) "error");
rt->add(msg);
rt->addTupleCount(2);
}
} else {
rt->addAtom((char *) "ok");
rt->add(wxString::FromAscii("already initilized"));
rt->addTupleCount(2);
}
rt->send();
}
void setActiveGL(ErlDrvTermData caller, wxGLCanvas *canvas)
{
gl_active = caller;
glc[caller] = canvas;
}
void deleteActiveGL(wxGLCanvas *canvas)
{
gl_active = 0;
wxeGLC::iterator it;
for(it = glc.begin(); it != glc.end(); ++it) {
if(it->second == canvas) {
it->second = (wxGLCanvas *) 0;
}
}
}
void gl_dispatch(int op, char *bp,ErlDrvTermData caller,WXEBinRef *bins){
if(caller != gl_active) {
wxGLCanvas * current = glc[caller];
if(current) {
if(current != glc[gl_active]) {
gl_active = caller;
current->SetCurrent();
}
} else {
ErlDrvTermData rt[] = // Error msg
{ERL_DRV_ATOM, driver_mk_atom((char *) "_egl_error_"),
ERL_DRV_INT, (ErlDrvTermData) op,
ERL_DRV_ATOM, driver_mk_atom((char *) "no_gl_context"),
ERL_DRV_TUPLE,3};
erl_drv_send_term(WXE_DRV_PORT,caller,rt,8);
return ;
}
};
char * bs[3];
int bs_sz[3];
for(int i=0; i<3; i++) {
if(bins[i].from) {
bs[i] = bins[i].base;
bs_sz[i] = bins[i].size;
}
else
break;
}
wxe_gl_dispatch(op, bp, WXE_DRV_PORT_HANDLE, caller, bs, bs_sz);
}
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