Add set_position and set_color to rectangle,sprite and text

1 files changed, 167 insertions, 0 deletions

diff --git a/src/window/window.c b/src/window/window.c
new file mode 100644
index 0000000..3c5ce56
--- /dev/null
+++ b/src/window/window.c
@@ -0,0 +1,167 @@
+#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, mgl_window_callback *callback) {
+    return mgl_window_create_with_params(self, title, width, height, 0, callback);
+}
+
+int mgl_window_create_with_params(mgl_window *self, const char *title, int width, int height, unsigned long parent_window, mgl_window_callback *callback) {
+    self->window = 0;
+    self->callback = *callback;
+
+    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;
+
+    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);
+
+    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);
+    mgl_window_draw(self);
+    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_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_events_poll(mgl_window *self) {
+    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 = 0;
+    tv.tv_usec = 0;
+    /*tv.tv_sec = timeout_ms / 1000;
+    tv.tv_usec = (timeout_ms * 1000) - (tv.tv_sec * 1000 * 1000);*/
+
+    /* TODO: Is this needed when using XPending? */
+    /*const int num_ready_fds = select(1 + x11_fd, &in_fds, NULL, NULL, &tv);*/
+    const int num_ready_fds = 1;
+    if(num_ready_fds > 0) {
+        XEvent xev;
+        while(self->window && XPending(display)) {
+            XNextEvent(display, &xev);
+            mgl_window_on_receive_event(self, &xev);
+        }
+    } else if(num_ready_fds == -1 && errno != EINTR) {
+        /* TODO: */
+        fprintf(stderr, "Disconnected!\n");
+    }
+}
+
+void mgl_window_draw(mgl_window *self) {
+    mgl_context *context = mgl_get_context();
+    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->gl.glXSwapBuffers(context->connection, self->window);
+}