#include <stdio.h>
#include <stdlib.h>
#include <X11/X.h>
#include <X11/Xlib.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glx.h>

#include "us_types.h"

Display *displ;
Window win;
Window root;
XEvent evn;
GLint att[] = {GLX_RGBA,GLX_DEPTH_SIZE,24,GLX_DOUBLEBUFFER,None};
XVisualInfo *vi;
Colormap cmap;
XSetWindowAttributes swa;
GLXContext glc;
XWindowAttributes gwa;

GLuint texture1;

u32 holst_x;
u32 holst_y;
u8* holst;

u8 pereris = 1;

GLvoid LoadHolst() {
    glGenTextures(1, &texture1);
    glBindTexture(GL_TEXTURE_2D, texture1);
    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
    glTexImage2D(GL_TEXTURE_2D,0,3,400,400,0,GL_RGB,GL_UNSIGNED_BYTE,holst);
}

void DrawHolst() {
    printf("%i %i\n",holst_x,holst_y); //выводит 0 0 <---------------------------------------------------------- смотри сюда
    //glClearColor(0,0,0,0);
    //glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    LoadHolst();

    glBegin(GL_QUADS);
    glTexCoord2f(0,1); glVertex2f(-1,1);
    glTexCoord2f(1,1); glVertex2f(1,1);
    glTexCoord2f(1,0); glVertex2f(1,-1);
    glTexCoord2f(0,0); glVertex2f(-1,-1);
    glEnd();
}

int main() {
    u32 holst_x = 400;
    u32 holst_y = 400;

    displ = (XOpenDisplay(NULL));
    root = DefaultRootWindow(displ);
    vi = glXChooseVisual(displ,0,att);
    cmap = XCreateColormap(displ,root,vi->visual,AllocNone);
    swa.colormap = cmap;
    swa.event_mask = ExposureMask | KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask | Button1MotionMask | Button2MotionMask;
    win = XCreateWindow(displ,root,0,0,holst_x,holst_y,0,vi->depth,InputOutput,vi->visual,CWColormap | CWEventMask,&swa);
    XMapWindow(displ,win);
    XStoreName(displ,win,"VERY SIMPLE APPLICATION");
    glc = glXCreateContext(displ,vi,NULL,GL_TRUE);
    glXMakeCurrent(displ,win,glc);

    holst = malloc(holst_x*holst_y*3);

    u64 i = 0;
    while (i < holst_x*holst_y*3) {
        *(holst + i) = 127;
        i++;
    }

    glEnable(GL_TEXTURE_2D);

    int cursor_x,cursor_y;

    while (1) {
        if (pereris) {
            XGetWindowAttributes(displ,win,&gwa);
            glViewport(0,0,gwa.width,gwa.height);
            printf("%i %i\n",holst_x,holst_y); //выводит 400 400 <------------------------------------- смотри сюда
            DrawHolst();
            glXSwapBuffers(displ,win);
            pereris = 0;
        }

        XNextEvent(displ,&evn);

        switch (evn.type) {
            case KeyPress: {
                glXMakeCurrent(displ,None,NULL);
                glXDestroyContext(displ,glc);
                XDestroyWindow(displ,win);
                XCloseDisplay(displ);
                free(holst);
                exit(0);
                break;
            }
            case ButtonPress: {
                cursor_x = evn.xbutton.x;
                cursor_y = evn.xbutton.y;
                switch (evn.xbutton.button) {
                    case Button1: {
                        *(holst + ((holst_y - evn.xbutton.y - 1)*holst_x + evn.xbutton.x - 1)*3) = 255;
                        *(holst + ((holst_y - evn.xbutton.y - 1)*holst_x + evn.xbutton.x - 1)*3 + 1) = 255;
                        *(holst + ((holst_y - evn.xbutton.y - 1)*holst_x + evn.xbutton.x - 1)*3 + 2) = 0;
                        break;
                    }
                    case Button3: {
                        *(holst + ((holst_y - evn.xbutton.y - 1)*holst_x + evn.xbutton.x - 1)*3) = 0;
                        *(holst + ((holst_y - evn.xbutton.y - 1)*holst_x + evn.xbutton.x - 1)*3 + 1) = 255;
                        *(holst + ((holst_y - evn.xbutton.y - 1)*holst_x + evn.xbutton.x - 1)*3 + 2) = 255;
                        break;
                    }
                }
                pereris = 1;
                break;
            }





        }
    }
}