From 634bb3ca825dc6659f03a3013694c5c7b64460e8 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Thu, 2 Jul 2009 18:12:25 +0000
Subject: Put windowing interface in libdimension-tests.

---
 tests/tests.c | 179 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)

(limited to 'tests/tests.c')

diff --git a/tests/tests.c b/tests/tests.c
index b938d39..0816c5d 100644
--- a/tests/tests.c
+++ b/tests/tests.c
@@ -20,6 +20,185 @@
 
 #include "tests.h"
 
+/* XIfEvent callback */
+static Bool
+WaitForNotify(Display *d, XEvent *e, char *arg)
+{
+  return (e->type == MapNotify) && (e->xmap.window == (Window)arg);
+}
+
+/* New non-glX X window */
+dmnsn_display *
+dmnsn_new_X_display(const dmnsn_canvas *canvas)
+{
+  dmnsn_display *display;
+  int screen, depth;
+  Visual *visual;
+  XSetWindowAttributes swa;
+
+  display = malloc(sizeof(dmnsn_display));
+  if (!display) {
+    return NULL;
+  }
+
+  /* Get an X connection */
+  display->dpy = XOpenDisplay(0);
+  if (!display->dpy) {
+    free(display);
+    return NULL;
+  }
+  screen = DefaultScreen(display->dpy);
+  depth  = DefaultDepth(display->dpy, screen);
+
+  /* Get an appropriate visual */
+  visual = DefaultVisual(display->dpy, screen);
+
+  /* Set display->cx to NULL */
+  display->cx = NULL;
+
+  /* Create a color map */
+  display->cmap = XCreateColormap(display->dpy,
+                                  RootWindow(display->dpy, screen),
+                                  visual, AllocNone);
+  if (!display->cmap) {
+    glXDestroyContext(display->dpy, display->cx);
+    XCloseDisplay(display->dpy);
+    free(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, screen),
+                               0, 0, canvas->x, canvas->y,
+                               0, depth, InputOutput, visual,
+                               CWBorderPixel|CWColormap|CWEventMask, &swa);
+  if (!display->win) {
+    XFreeColormap(display->dpy, display->cmap);
+    glXDestroyContext(display->dpy, display->cx);
+    XCloseDisplay(display->dpy);
+    free(display);
+    return NULL;
+  }
+
+  XStoreName(display->dpy, display->win, "X");
+
+  XMapWindow(display->dpy, display->win);
+  XIfEvent(display->dpy, &display->event, WaitForNotify, (char*)display->win);
+
+  return display;
+}
+
+dmnsn_display *
+dmnsn_new_glX_display(const dmnsn_canvas *canvas)
+{
+  int attributeList[] = {
+    GLX_RGBA,
+    GLX_DOUBLEBUFFER,
+    GLX_RED_SIZE, 1,
+    GLX_GREEN_SIZE, 1,
+    GLX_BLUE_SIZE, 1,
+    None
+  };
+  dmnsn_display *display;
+  XVisualInfo *vi;
+  XSetWindowAttributes swa;
+
+  display = malloc(sizeof(dmnsn_display));
+  if (!display) {
+    return NULL;
+  }
+
+  /* Get an X connection */
+  display->dpy = XOpenDisplay(0);
+  if (!display->dpy) {
+    free(display);
+    return NULL;
+  }
+
+  /* Get an appropriate visual */
+  vi = glXChooseVisual(display->dpy, DefaultScreen(display->dpy),
+                       attributeList);
+  if (!vi) {
+    XCloseDisplay(display->dpy);
+    free(display);
+    return NULL;
+  }
+
+  /* Create a GLX context */
+  display->cx = glXCreateContext(display->dpy, vi, 0, GL_TRUE);
+  if (!display->cx) {
+    XCloseDisplay(display->dpy);
+    free(display);
+    return NULL;
+  }
+
+  /* Create a color map */
+  display->cmap = XCreateColormap(display->dpy,
+                                  RootWindow(display->dpy, vi->screen),
+                                  vi->visual, AllocNone);
+  if (!display->cmap) {
+    glXDestroyContext(display->dpy, display->cx);
+    XCloseDisplay(display->dpy);
+    free(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, vi->screen),
+                               0, 0, canvas->x, canvas->y,
+                               0, vi->depth, InputOutput, vi->visual,
+                               CWBorderPixel|CWColormap|CWEventMask, &swa);
+  if (!display->win) {
+    XFreeColormap(display->dpy, display->cmap);
+    glXDestroyContext(display->dpy, display->cx);
+    XCloseDisplay(display->dpy);
+    free(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);
+
+  return display;
+}
+
+void
+dmnsn_delete_display(dmnsn_display *display)
+{
+  if (display) {
+    XDestroyWindow(display->dpy, display->win);
+    XFreeColormap(display->dpy, display->cmap);
+    if (display->cx) {
+      glXDestroyContext(display->dpy, display->cx);
+    }
+    XCloseDisplay(display->dpy);
+    free(display);
+  }
+}
+
+void
+dmnsn_display_frame(dmnsn_display *display)
+{
+  if (display->cx) {
+    glFlush();
+    glXSwapBuffers(display->dpy, display->win);
+  }
+  XSync(display->dpy, True);
+}
+
 /* Print a progress bar of the progress of `progress' */
 void
 progressbar(const char *str, const dmnsn_progress *progress)
-- 
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