Test for GLX usability.

1 files changed, 151 insertions, 0 deletions

diff --git a/tests/libdimension/display.c b/tests/libdimension/display.c
new file mode 100644
index 0000000..3fb07e4
--- /dev/null
+++ b/tests/libdimension/display.c
@@ -0,0 +1,151 @@
+/*************************************************************************
+ * Copyright (C) 2009-2010 Tavian Barnes <tavianator@gmail.com>          *
+ *                                                                       *
+ * This file is part of The Dimension Test Suite.                        *
+ *                                                                       *
+ * The Dimension Test Suite 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.                       *
+ *                                                                       *
+ * The Dimension Test Suite 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 "tests.h"
+#include <GL/glx.h>
+#include <GL/gl.h>
+#include <stdlib.h>
+
+struct dmnsn_display {
+  Display *dpy;
+  Window win;
+  Colormap cmap;
+  GLXContext cx;
+  XEvent event;
+  XVisualInfo *vi;
+};
+
+/* XIfEvent callback */
+static Bool
+WaitForNotify(Display *d, XEvent *e, char *arg)
+{
+  return (e->type == MapNotify) && (e->xmap.window == (Window)arg);
+}
+
+dmnsn_display *
+dmnsn_new_display(const dmnsn_canvas *canvas)
+{
+  int attributeList[] = {
+    GLX_RGBA,
+    GLX_DOUBLEBUFFER,
+    GLX_RED_SIZE, 1,
+    GLX_GREEN_SIZE, 1,
+    GLX_BLUE_SIZE, 1,
+    None
+  };
+  XSetWindowAttributes swa;
+  dmnsn_display *display;
+
+  display = dmnsn_malloc(sizeof(dmnsn_display));
+
+  display->dpy  = NULL;
+  display->win  = 0;
+  display->cmap = 0;
+  display->cx   = NULL;
+  display->vi   = NULL;
+
+  /* Get an X connection */
+  display->dpy = XOpenDisplay(0);
+  if (!display->dpy) {
+    dmnsn_delete_display(display);
+    return NULL;
+  }
+
+  /* Get an appropriate visual */
+  display->vi = glXChooseVisual(display->dpy, DefaultScreen(display->dpy),
+                                attributeList);
+  if (!display->vi) {
+    dmnsn_delete_display(display);
+    return NULL;
+  }
+
+  /* Create a GLX context */
+  display->cx = glXCreateContext(display->dpy, display->vi, 0, GL_TRUE);
+  if (!display->cx) {
+    dmnsn_delete_display(display);
+    return NULL;
+  }
+
+  /* Create a color map */
+  display->cmap = XCreateColormap(display->dpy,
+                                  RootWindow(display->dpy, display->vi->screen),
+                                  display->vi->visual, AllocNone);
+  if (!display->cmap) {
+    dmnsn_delete_display(display);
+    return NULL;
+  }
+
+  /* Create a window */
+  swa.colormap = display->cmap;
+  swa.border_pixel = 0;
+  swa.event_mask = StructureNotifyMask;
+  display->win = XCreateWindow(display->dpy,
+                               RootWindow(display->dpy, display->vi->screen),
+                               0, 0, canvas->width, canvas->height,
+                               0, display->vi->depth, InputOutput,
+                               display->vi->visual,
+                               CWBorderPixel|CWColormap|CWEventMask, &swa);
+  if (!display->win) {
+    dmnsn_delete_display(display);
+    return NULL;
+  }
+
+  XStoreName(display->dpy, display->win, "glX");
+
+  XMapWindow(display->dpy, display->win);
+  XIfEvent(display->dpy, &display->event, WaitForNotify, (char*)display->win);
+
+  /* Connect the context to the window */
+  glXMakeCurrent(display->dpy, display->win, display->cx);
+  glClearColor(0.0, 0.0, 0.0, 1.0);
+  glClear(GL_COLOR_BUFFER_BIT);
+  dmnsn_display_flush(display);
+
+  return display;
+}
+
+void
+dmnsn_delete_display(dmnsn_display *display)
+{
+  if (display) {
+    if (display->win)
+      XDestroyWindow(display->dpy, display->win);
+
+    if (display->cmap)
+      XFreeColormap(display->dpy, display->cmap);
+
+    if (display->cx)
+      glXDestroyContext(display->dpy, display->cx);
+
+    if (display->vi)
+      XFree(display->vi);
+
+    if (display->dpy)
+      XCloseDisplay(display->dpy);
+
+    dmnsn_free(display);
+  }
+}
+
+void
+dmnsn_display_flush(dmnsn_display *display)
+{
+  glXWaitX();
+  glXSwapBuffers(display->dpy, display->win);
+}