add GLUT_window ex

GLUT_window/opengl.c

@@ -0,0 +1,162 @@
+/*
+ * This file is part of the opengl project.
+ * Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <usefull_macros.h>
+
+#include "aux.h"
+#include "cmdlnopts.h"
+#include "image_functions.h"
+#include "imageview.h"
+
+void signals(int sig){
+    if(sig){
+        signal(sig, SIG_IGN);
+        DBG("Get signal %d, quit.\n", sig);
+    }
+    putlog("Exit with status %d", sig);
+    if(G.pidfile) // remove unnesessary PID file
+        unlink(G.pidfile);
+    exit(sig);
+}
+
+// manage some menu/shortcut events
+static void winevt_manage(windowData *win, IMG *convertedImage){
+    if(win->winevt & WINEVT_SAVEIMAGE){ // save image
+        VDBG("Try to make screenshot");
+        DBG("Try to make screenshot");
+        //saveImages(convertedImage, "ScreenShot");
+        win->winevt &= ~WINEVT_SAVEIMAGE;
+    }
+    if(win->winevt & WINEVT_ROLLCOLORFUN){
+        roll_colorfun();
+        win->winevt &= ~WINEVT_ROLLCOLORFUN;
+        change_displayed_image(win, convertedImage);
+    }
+}
+
+// main thread to deal with image
+static void* image_thread(_U_ void *data){
+    FNAME();
+    IMG *img = (IMG*) data;
+    while(1){
+        windowData *win = getWin();
+        if(!win){
+            DBG("!win");
+            pthread_exit(NULL);
+        }
+        if(win->killthread){
+            DBG("got killthread");
+            pthread_exit(NULL);
+        }
+        if(win->winevt) winevt_manage(win, img);
+        usleep(10000);
+    }
+}
+
+static void modifyImg(IMG* ima){
+    for(int x = 0; x < ima->w; ++x){
+        uint16_t c = rand() & 0xffff;
+        int y = rand() % ima->h;
+        ima->data[x + y*ima->w] = c;
+        ima->data[5 + x*ima->w] = 1000;
+        ima->data[105 + x*ima->w] = 10000;
+        ima->data[205 + x*ima->w] = 50000;
+        ima->data[305 + x*ima->w] = 0xffff;
+    }
+}
+
+int main(int argc, char **argv){
+    int ret = 0;
+    initial_setup();
+    char *self = strdup(argv[0]);
+    parse_args(argc, argv);
+    char *outfprefix = NULL;
+    if(G.rest_pars_num){
+        if(G.rest_pars_num != 1){
+            WARNX("You should point only one free argument - filename prefix");
+            signals(1);
+        }else outfprefix = G.rest_pars[0];
+    }
+    check4running(self, G.pidfile);
+    FREE(self);
+    signal(SIGTERM, signals); // kill (-15) - quit
+    signal(SIGHUP, SIG_IGN);  // hup - ignore
+    signal(SIGINT, signals);  // ctrl+C - quit
+    signal(SIGQUIT, signals); // ctrl+\ - quit
+    signal(SIGTSTP, SIG_IGN); // ignore ctrl+Z
+
+    windowData *mainwin = NULL;
+
+    if(!G.showimage && !outfprefix){ // not display image & not save it?
+        ERRX("You should point file name or option `display image`");
+    }
+    if(G.showimage){
+        imageview_init();
+    }
+    IMG convertedImage = {.h = 400, .w = 400};
+    convertedImage.data = MALLOC(uint16_t, convertedImage.h * convertedImage.w);
+    for(int i = 0; i < convertedImage.h * convertedImage.w; ++i) convertedImage.data[i] = 100;
+    DBG("data[200*200]=%d", convertedImage.data[200*200]);
+        if(G.showimage){
+            if(!mainwin){
+                DBG("Create window @ start");
+                mainwin = createGLwin("Sample window", convertedImage.w, convertedImage.h, NULL);
+                if(!mainwin){
+                    WARNX("Can't open OpenGL window, image preview will be inaccessible");
+                }else
+                    pthread_create(&mainwin->thread, NULL, &image_thread, (void*)&convertedImage); //(void*)mainwin);
+            }
+            if((mainwin = getWin())){
+                DBG("change image");
+                if(mainwin->killthread) goto destr;
+                modifyImg(&convertedImage);
+                change_displayed_image(mainwin, &convertedImage);
+                while((mainwin = getWin())){ // test paused state & grabbing custom frames
+                    if((mainwin->winevt & WINEVT_PAUSE) == 0) break;
+                    if(mainwin->winevt & WINEVT_GETIMAGE){
+                        mainwin->winevt &= ~WINEVT_GETIMAGE;
+                        modifyImg(&convertedImage);
+                        change_displayed_image(mainwin, &convertedImage);
+                    }
+                    usleep(10000);
+                }
+            }
+        }
+    if((mainwin = getWin())) mainwin->winevt |= WINEVT_PAUSE;
+destr:
+    if(G.showimage){
+        while((mainwin = getWin())){
+            modifyImg(&convertedImage);
+            change_displayed_image(mainwin, &convertedImage);
+            if(mainwin->killthread) break;
+            if(mainwin->winevt & WINEVT_GETIMAGE){
+                mainwin->winevt &= ~WINEVT_GETIMAGE;
+                modifyImg(&convertedImage);
+                change_displayed_image(mainwin, &convertedImage);
+            }
+        }
+        DBG("Close window");
+        clear_GL_context();
+    }
+    signals(ret);
+    return ret;
+}