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#include "../include/mgl/window.h"
#include "../include/mgl/mgl.h"
#include <X11/Xutil.h>
#include <stdio.h>
#define GL_COLOR_BUFFER_BIT 0x00004000
int mgl_window_create(mgl_window *self, const char *title, int width, int height, mgl_window_callback *callback, void *userdata) {
return mgl_window_create_with_params(self, title, width, height, DefaultRootWindow(mgl_get_context()->connection), callback, userdata);
}
int mgl_window_create_with_params(mgl_window *self, const char *title, int width, int height, unsigned long parent_window, mgl_window_callback *callback, void *userdata) {
self->window = 0;
self->callback = *callback;
self->callback_userdata = userdata;
mgl_context *context = mgl_get_context();
Colormap color_map = XCreateColormap(context->connection, DefaultRootWindow(context->connection), ((XVisualInfo*)context->visual_info)->visual, AllocNone);
if(!color_map) {
fprintf(stderr, "XCreateColormap failed\n");
return -1;
}
XSetWindowAttributes window_attr;
window_attr.colormap = color_map;
window_attr.event_mask = ExposureMask | KeyPressMask;
self->window = XCreateWindow(context->connection, parent_window, 0, 0, width, height, 0, ((XVisualInfo*)context->visual_info)->depth, InputOutput, ((XVisualInfo*)context->visual_info)->visual, CWColormap | CWEventMask, &window_attr);
//XFreeColormap(context->connection, color_map);
if(!self->window) {
fprintf(stderr, "XCreateWindow failed\n");
mgl_window_deinit(self);
return -1;
}
/* TODO: Test utf8 */
XStoreName(context->connection, self->window, title);
return 0;
}
void mgl_window_deinit(mgl_window *self) {
mgl_context *context = mgl_get_context();
if(self->window) {
XDestroyWindow(context->connection, self->window);
self->window = 0;
}
}
static void mgl_window_draw(mgl_window *self) {
mgl_context *context = mgl_get_context();
/* TODO: Get window size from window resize event instead */
XWindowAttributes gwa;
XGetWindowAttributes(context->connection, self->window, &gwa);
context->gl.glViewport(0, 0, gwa.width, gwa.height);
context->gl.glClear(GL_COLOR_BUFFER_BIT);
context->gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
if(self->callback.draw)
self->callback.draw(self, self->callback_userdata);
context->glx.glXSwapBuffers(context->connection, self->window);
}
void mgl_window_show(mgl_window *self) {
mgl_context *context = mgl_get_context();
XMapWindow(context->connection, self->window);
XFlush(context->connection);
/* TODO: Switch current when rendering to another window, and set current to NULL when destroying the currently selected context */
context->glx.glXMakeCurrent(context->connection, self->window, context->glx_context);
mgl_window_draw(self);
}
static void on_receive_x11_event(mgl_window *window, XEvent *xev) {
switch(xev->type) {
case Expose:
mgl_window_draw(window);
break;
}
}
void mgl_window_event_poll(mgl_window *self, int timeout_ms) {
Display *display = mgl_get_context()->connection;
const int x11_fd = ConnectionNumber(display);
fd_set in_fds;
FD_ZERO(&in_fds); /* TODO: Optimize */
FD_SET(x11_fd, &in_fds);
struct timeval tv;
tv.tv_sec = timeout_ms / 1000;
tv.tv_usec = (timeout_ms * 1000) - (tv.tv_sec * 1000 * 1000);
const int num_ready_fds = select(1 + x11_fd, &in_fds, NULL, NULL, &tv);
if(num_ready_fds > 0) {
XEvent xev;
while(XPending(display)) {
XNextEvent(display, &xev);
on_receive_x11_event(self, &xev);
}
}
}
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