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-rw-r--r--sys/glsink/gstglxwindow.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/sys/glsink/gstglxwindow.c b/sys/glsink/gstglxwindow.c
new file mode 100644
index 00000000..79b743a0
--- /dev/null
+++ b/sys/glsink/gstglxwindow.c
@@ -0,0 +1,241 @@
+/* This stores the common OpenGL initialization stuff for all instances */
+
+/* gcc -ansi -pedantic on GNU/Linux causes warnings and errors
+ * unless this is defined:
+ * warning: #warning "Files using this header must be compiled with _SVID_SOURCE or _XOPEN_SOURCE"
+ */
+#ifndef _XOPEN_SOURCE
+# define _XOPEN_SOURCE 1
+#endif
+
+#include <X11/Xlib.h>
+#include <GL/glx.h>
+#include <GL/gl.h>
+#include <GL/glu.h>
+#include "gstglsink.h"
+#include <string.h> /* strncmp */
+
+/* attributes for a single buffered visual in RGBA format with at least
+ * 4 bits per color and a 16 bit depth buffer */
+static int attrListSgl[] =
+{
+ GLX_RGBA, GLX_RED_SIZE, 4,
+ GLX_GREEN_SIZE, 4,
+ GLX_BLUE_SIZE, 4,
+ GLX_DEPTH_SIZE, 16,
+ None
+};
+
+/* attributes for a double buffered visual in RGBA format with at least
+ * 4 bits per color and a 16 bit depth buffer */
+static int attrListDbl[] =
+ {
+ GLX_RGBA, GLX_DOUBLEBUFFER,
+ GLX_RED_SIZE, 4,
+ GLX_GREEN_SIZE, 4,
+ GLX_BLUE_SIZE, 4,
+ GLX_DEPTH_SIZE, 16,
+ None
+ };
+
+
+GLfloat LightAmbient[] = { 0.1, 0.1, 0.1, 1.0 }; /* reddish ambient light */
+GLfloat LightDiffuse[] = { 0.6, 0.6, 0.6, 1.0 }; /* bluish diffuse light. */
+GLfloat LightPosition[] = { 1.5, 1.5, 1.5, 0.0 }; /* position */
+
+
+static void
+gst_glxwindow_free (GstImageInfo *info)
+{
+ GstGLImageInfo *window = (GstGLImageInfo *) info;
+
+ g_signal_handler_disconnect (window->sink, window->handler_id);
+
+ if (window->ctx)
+ {
+ if (!glXMakeCurrent(window->dpy, None, NULL))
+ {
+ printf("Could not release drawing context.\n");
+ }
+ glXDestroyContext(window->dpy, window->ctx);
+ window->ctx = NULL;
+ }
+#if 0
+ /* switch back to original desktop resolution if we were in fs */
+ if (GLWin.fs)
+ {
+ XF86VidModeSwitchToMode(GLWin.dpy, GLWin.screen, &GLWin.deskMode);
+ XF86VidModeSetViewPort(GLWin.dpy, GLWin.screen, 0, 0);
+ }
+#endif
+ XCloseDisplay (window->dpy);
+ g_free (window);
+}
+
+static void
+gst_glxwindow_callback(GObject *object, GParamSpec *pspec, GstGLImageInfo *data)
+{
+ XWindowAttributes attr;
+ XGetWindowAttributes(data->dpy, data->win, &attr);
+
+ if (strncmp (pspec->name, "width", 5) == 0 || strncmp (pspec->name, "height", 6) == 0)
+ {
+ gint w = 0;
+ gint h = 0;
+ g_object_get (object, "width", &w, NULL);
+ g_object_get (object, "height", &h, NULL);
+ if (w != attr.width || h != attr.height)
+ {
+ attr.width = w;
+ attr.height = h;
+ XResizeWindow (data->dpy, data->win, attr.width, attr.height);
+ XMapRaised (data->dpy, data->win);
+
+ // resize OpenGL
+ //g_warning("resizing in OpenGL");
+ glViewport(0, 0, (GLint) w, (GLint) h);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+
+ GLfloat aspect = (GLfloat) h / (GLfloat) w;
+ glFrustum(-1.0, 1.0, -aspect, aspect, 5.0, 500.0);
+ }
+ }
+ if (attr.width != data->width || attr.height != data->height)
+ {
+ data->width = attr.width;
+ data->height = attr.height;
+ }
+
+}
+
+void
+gst_glxwindow_new (GstElement *sink)
+{
+ //XGCValues values;
+ GstGLImageInfo *new;
+ int glxMajorVersion, glxMinorVersion;
+ //XSetWindowAttributes attrib;
+ XVisualInfo *vi;
+ Atom wmDelete;
+ Window winDummy;
+ unsigned int borderDummy;
+ Colormap cmap;
+ char* title = "GLSink (experimental)";
+
+ new = g_new0 (GstGLImageInfo, 1);
+
+ if (sink == NULL)
+ {
+ sink = gst_element_factory_make ("glsink", "glsink");
+ g_assert (sink != NULL);
+ }
+
+ /* fill in the ImageInfo */
+ new->info.id = GST_MAKE_FOURCC ('X', 'l', 'i', 'b');
+ new->info.free_info = gst_glxwindow_free;
+
+ new->dpy = XOpenDisplay (NULL);
+ if (!new->dpy) {
+ g_warning ("open display failed!\n");
+ g_free (new);
+ return;
+ }
+ new->screen = DefaultScreen(new->dpy);
+ /* get an appropriate visual */
+ vi = glXChooseVisual(new->dpy, new->screen, attrListDbl);
+ if (vi == NULL)
+ {
+ vi = glXChooseVisual(new->dpy, new->screen, attrListSgl);
+ GST_DEBUG("Only Singlebuffered Visual!\n");
+ }
+ else
+ {
+ GST_DEBUG("Got Doublebuffered Visual!\n");
+ }
+ glXQueryVersion(new->dpy, &glxMajorVersion, &glxMinorVersion);
+ GST_DEBUG("glX-Version %d.%d\n", glxMajorVersion, glxMinorVersion);
+
+ /* create a GLX context */
+ new->ctx = glXCreateContext(new->dpy, vi, 0, GL_TRUE);
+ /* create a color map */
+ cmap = XCreateColormap(new->dpy, RootWindow(new->dpy, vi->screen),
+ vi->visual, AllocNone);
+ new->attr.colormap = cmap;
+ new->attr.border_pixel = 0;
+
+ /* set sizes */
+ new->x = 0;
+ new->y = 0;
+ new->width = 10;
+ new->height = 10;
+
+ new->rotX = 0;
+ new->rotY = 0;
+ new->zoom = 1;
+ new->zoomdir = 0.01;
+
+ {
+ /* create a window in window mode*/
+ new->attr.event_mask = ExposureMask | KeyPressMask | ButtonPressMask |
+ StructureNotifyMask;
+ new->win = XCreateWindow(new->dpy, RootWindow(new->dpy, vi->screen),
+ new->x, new->y, new->width, new->height, 0, vi->depth, InputOutput, vi->visual,
+ CWBorderPixel | CWColormap | CWEventMask, &new->attr);
+ if (!new->win)
+ {
+ g_warning ("create window failed\n");
+ g_free (new);
+ return;
+ }
+ /* only set window title and handle wm_delete_events if in windowed mode */
+ wmDelete = XInternAtom(new->dpy, "WM_DELETE_WINDOW", True);
+ XSetWMProtocols(new->dpy, new->win, &wmDelete, 1);
+ XSetStandardProperties(new->dpy, new->win, title,
+ title, None, NULL, 0, NULL);
+ XMapRaised(new->dpy, new->win);
+ }
+ /* connect the glx-context to the window */
+ glXMakeCurrent(new->dpy, new->win, new->ctx);
+ XGetGeometry(new->dpy, new->win, &winDummy, &new->x, &new->y,
+ &new->width, &new->height, &borderDummy, &new->depth);
+ printf("Depth %d\n", new->depth);
+ if (glXIsDirect(new->dpy, new->ctx))
+ GST_DEBUG ("Congrats, you have Direct Rendering!\n");
+ else
+ GST_DEBUG ("Sorry, no Direct Rendering possible!\n");
+
+ GST_DEBUG("Initializing OpenGL parameters\n");
+ /* initialize OpenGL drawing */
+ glEnable(GL_DEPTH_TEST);
+ //glShadeModel(GL_SMOOTH);
+
+ glEnable(GL_TEXTURE_2D);
+ glDisable(GL_CULL_FACE);
+ glClearDepth(1.0f);
+ glClearColor(0, 0, 0, 0);
+
+ glLightfv(GL_LIGHT0, GL_AMBIENT, LightAmbient); /* add lighting. (ambient) */
+ glLightfv(GL_LIGHT0, GL_DIFFUSE, LightDiffuse); /* add lighting. (diffuse). */
+ glLightfv(GL_LIGHT0, GL_POSITION,LightPosition); /* set light position. */
+
+ //glEnable(GL_LIGHT0); // Quick And Dirty Lighting (Assumes Light0 Is Set Up)
+ //glEnable(GL_LIGHTING); // Enable Lighting
+ glDisable(GL_COLOR_MATERIAL); // Enable Material Coloring
+ glEnable(GL_AUTO_NORMAL); // let OpenGL generate the Normals
+
+ glDisable(GL_BLEND);
+
+ glPolygonMode(GL_FRONT, GL_FILL);
+ glPolygonMode(GL_BACK, GL_FILL);
+
+ glShadeModel(GL_SMOOTH);
+ glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST);
+
+ XSelectInput (new->dpy, new->win, ExposureMask | StructureNotifyMask);
+
+ g_object_set (sink, "hook", new, NULL);
+ new->sink = sink;
+ new->handler_id = g_signal_connect (sink, "notify", G_CALLBACK (gst_glxwindow_callback), new);
+}
+
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