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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2008-2022. 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>
#endif
#include "wxe_impl.h"
#include "wxe_return.h"
#include "wxe_gl.h"
#define GLE_LIB_START 5000
/* ****************************************************************************
*
* Opengl context management *
* This is wx part of opengl context and dispatch handling
* it is part of the wxe_driver dll
*
* ****************************************************************************/
ErlNifUInt64 gl_active_index = 0;
ErlNifPid gl_active_pid;
int egl_initiated = 0;
wxeGLC glc;
typedef void * (*WXE_GL_LOOKUP) (int);
WXE_GL_LOOKUP wxe_gl_lookup_func = NULL;
typedef void * (*WXE_GL_FUNC) (ErlNifEnv*, ErlNifPid*, const ERL_NIF_TERM argv[]);
extern "C" {
void wxe_initOpenGL(void * fptr) {
wxe_gl_lookup_func = (WXE_GL_LOOKUP) fptr;
enif_set_pid_undefined(&gl_active_pid);
}
}
ErlNifUInt64 wxe_make_hash(ErlNifEnv *env, ErlNifPid *pid)
{
ERL_NIF_TERM term = enif_make_pid(env, pid);
return enif_hash(ERL_NIF_INTERNAL_HASH, term, 786234121);
}
void setActiveGL(wxeMemEnv *memenv, ErlNifPid caller, wxGLCanvas *canvas, wxGLContext *context)
{
ErlNifUInt64 callId = wxe_make_hash(memenv->tmp_env, &caller);
wxe_glc * entry = glc[callId];
gl_active_index = callId;
gl_active_pid = caller;
if(!entry) {
entry = (wxe_glc *) malloc(sizeof(wxe_glc));
entry->canvas = NULL;
entry->context = NULL;
}
if(entry->canvas == canvas && entry->context == context)
return;
entry->canvas = canvas;
entry->context = context;
glc[gl_active_index] = entry;
//fprintf(stderr, "set caller %p => %p\r\n", caller, canvas);
if(!egl_initiated && wxe_gl_lookup_func) {
WXE_GL_FUNC fptr;
if((fptr = (WXE_GL_FUNC) wxe_gl_lookup_func(GLE_LIB_START))) {
fptr(memenv->tmp_env, &caller, NULL);
egl_initiated = 1;
}
}
}
void deleteActiveGL(wxGLCanvas *canvas)
{
gl_active_index = 0;
enif_set_pid_undefined(&gl_active_pid);
wxeGLC::iterator it;
for(it = glc.begin(); it != glc.end(); ++it) {
wxe_glc * temp = it->second;
if(temp && temp->canvas == canvas) {
it->second = NULL;
free(temp);
}
}
}
void no_context(wxeCommand *event) {
enif_send(NULL, &event->caller, event->env,
enif_make_tuple3(event->env,
enif_make_atom(event->env, "_egl_error_"),
enif_make_int(event->env, event->op),
enif_make_atom(event->env, "no_gl_context")));
enif_clear_env(event->env);
}
void gl_dispatch(wxeCommand *event) {
WXE_GL_FUNC fptr;
if(egl_initiated) {
if(enif_compare_pids(&(event->caller),&gl_active_pid) != 0) {
ErlNifUInt64 caller_index = wxe_make_hash(event->env, &(event->caller));
wxe_glc * current = glc[caller_index];
if(current) {
wxe_glc * active = gl_active_index ? glc[gl_active_index] : NULL;
if(!active || current->canvas != active->canvas || current->context != active->context) {
current->canvas->SetCurrent(*current->context);
}
gl_active_index = caller_index;
gl_active_pid = event->caller;
} else {
no_context(event);
return;
}
}
} else {
no_context(event);
return;
}
if((fptr = (WXE_GL_FUNC) wxe_gl_lookup_func(event->op))) {
// enif_fprintf(stderr, "GL: caller %T gl_active %T %d\r\n", event->caller, gl_active_pid, event->op);
fptr(event->env, &event->caller, event->args);
} else {
enif_send(NULL, &event->caller, event->env,
enif_make_tuple3(event->env,
enif_make_atom(event->env, "_egl_error_"),
enif_make_int(event->env, event->op),
enif_make_atom(event->env, "undef")));
}
enif_clear_env(event->env);
}
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