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#include "../../include/mgl/window/window.h"
#include "../../include/mgl/mgl.h"
#include <X11/Xutil.h>
#include <errno.h>
#include <stdio.h>
/* TODO: check for glx swap control extension string (GLX_EXT_swap_control, etc) */
static void set_vertical_sync_enabled(Window window, int enabled) {
int result = 0;
mgl_context *context = mgl_get_context();
if(context->gl.glXSwapIntervalEXT) {
context->gl.glXSwapIntervalEXT(context->connection, window, enabled ? 1 : 0);
} else if(context->gl.glXSwapIntervalMESA) {
result = context->gl.glXSwapIntervalMESA(enabled ? 1 : 0);
} else if(context->gl.glXSwapIntervalSGI) {
result = context->gl.glXSwapIntervalSGI(enabled ? 1 : 0);
} else {
static int warned = 0;
if (!warned) {
warned = 1;
fprintf(stderr, "Warning: setting vertical sync not supported\n");
}
}
if(result != 0)
fprintf(stderr, "Warning: setting vertical sync failed\n");
}
static void mgl_window_on_resize(mgl_window *self, int width, int height) {
mgl_context *context = mgl_get_context();
self->size.x = width;
self->size.y = height;
context->gl.glViewport(0, 0, self->size.x, self->size.y);
context->gl.glMatrixMode(GL_PROJECTION);
context->gl.glLoadIdentity();
context->gl.glOrtho(0.0, width, height, 0.0, -1.0, 1.0);
}
int mgl_window_create(mgl_window *self, const char *title, int width, int height) {
return mgl_window_create_with_params(self, title, width, height, 0);
}
static int mgl_window_init(mgl_window *self, const char *title, int width, int height, mgl_window_handle parent_window, Window existing_window) {
self->window = 0;
mgl_context *context = mgl_get_context();
if(parent_window == 0)
parent_window = DefaultRootWindow(context->connection);
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 =
KeyPressMask | KeyReleaseMask |
ButtonPressMask | ButtonReleaseMask |
PointerMotionMask | Button1MotionMask | Button2MotionMask | Button3MotionMask | Button4MotionMask | Button5MotionMask | ButtonMotionMask |
StructureNotifyMask;
window_attr.bit_gravity = NorthWestGravity;
if(existing_window) {
if(!XChangeWindowAttributes(context->connection, existing_window, CWColormap | CWEventMask | CWBitGravity, &window_attr)) {
fprintf(stderr, "XChangeWindowAttributes failed\n");
XFreeColormap(context->connection, color_map);
return -1;
}
XFreeColormap(context->connection, color_map);
self->window = existing_window;
} else {
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 | CWBitGravity, &window_attr);
XFreeColormap(context->connection, color_map);
if(!self->window) {
fprintf(stderr, "XCreateWindow failed\n");
mgl_window_deinit(self);
return -1;
}
XStoreName(context->connection, self->window, title);
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->gl.glXMakeCurrent(context->connection, self->window, context->glx_context);
set_vertical_sync_enabled(self->window, 1);
context->gl.glEnable(GL_TEXTURE_2D);
context->gl.glEnable(GL_BLEND);
context->gl.glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
context->gl.glEnableClientState(GL_VERTEX_ARRAY);
context->gl.glEnableClientState(GL_COLOR_ARRAY);
context->gl.glEnableClientState(GL_TEXTURE_COORD_ARRAY);
XWindowAttributes gwa;
gwa.width = 0;
gwa.height = 0;
XGetWindowAttributes(context->connection, self->window, &gwa);
Window dummy_w;
int dummy_i;
unsigned int dummy_u;
XQueryPointer(context->connection, self->window, &dummy_w, &dummy_w, &dummy_i, &dummy_i, &self->cursor_position.x, &self->cursor_position.y, &dummy_u);
mgl_window_on_resize(self, gwa.width, gwa.height);
return 0;
}
int mgl_window_create_with_params(mgl_window *self, const char *title, int width, int height, mgl_window_handle parent_window) {
return mgl_window_init(self, title, width, height, parent_window, None);
}
int mgl_window_init_from_existing_window(mgl_window *self, mgl_window_handle existing_window) {
return mgl_window_init(self, "", 0, 0, 0, existing_window);
}
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_on_receive_event(mgl_window *self, XEvent *xev) {
switch(xev->type) {
case ConfigureNotify: {
while(XCheckTypedWindowEvent(mgl_get_context()->connection, self->window, ConfigureNotify, xev)) {}
if(xev->xconfigure.width != self->size.x || xev->xconfigure.height != self->size.x) {
mgl_window_on_resize(self, xev->xconfigure.width, xev->xconfigure.height);
/*fprintf(stderr, "resize!\n");*/
}
break;
}
case MotionNotify: {
while(XCheckTypedWindowEvent(mgl_get_context()->connection, self->window, MotionNotify, xev)) {}
self->cursor_position.x = xev->xmotion.x;
self->cursor_position.y = xev->xmotion.y;
break;
}
}
}
void mgl_window_clear(mgl_window *self, mgl_color color) {
mgl_context *context = mgl_get_context();
context->gl.glClear(GL_COLOR_BUFFER_BIT);
context->gl.glClearColor((float)color.r / 255.0f, (float)color.g / 255.0f, (float)color.b / 255.0f, (float)color.a / 255.0f);
}
bool mgl_window_poll_event(mgl_window *self, mgl_event *event) {
/* TODO: Use |event| */
Display *display = mgl_get_context()->connection;
if(XPending(display)) {
XEvent xev; /* TODO: Move to window struct */
XNextEvent(display, &xev);
mgl_window_on_receive_event(self, &xev);
return true;
} else {
return false;
}
}
void mgl_window_display(mgl_window *self) {
mgl_context *context = mgl_get_context();
context->gl.glXSwapBuffers(context->connection, self->window);
}
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