sys/glsink/: Split out gl-related code into a separate file with a sensible API. Major cleanup. Still crashes occas...

Original commit message from CVS:
* sys/glsink/Makefile.am:
* sys/glsink/glimagesink.c:
* sys/glsink/glvideo.c:
* sys/glsink/glvideo.h:
Split out gl-related code into a separate file with a
sensible API.  Major cleanup.  Still crashes occasionally
due to different threads touching bits at the same time.

1 files changed, 377 insertions, 0 deletions

diff --git a/sys/glsink/glvideo.c b/sys/glsink/glvideo.c
new file mode 100644
index 00000000..93a239db
--- /dev/null
+++ b/sys/glsink/glvideo.c
@@ -0,0 +1,377 @@
+/* glvideo.c
+ * Copyright (C) 2007 David A. Schleef <ds@schleef.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "glvideo.h"
+/* only use gst for debugging */
+#include <gst/gst.h>
+
+#include <string.h>
+
+
+static gboolean glv_display_check_features (GLVideoDisplay * display);
+
+
+GLVideoDisplay *
+glv_display_new (const char *display_name)
+{
+  GLVideoDisplay *display;
+  gboolean usable;
+
+  display = g_malloc0 (sizeof (GLVideoDisplay));
+
+  display->display = XOpenDisplay (display_name);
+  if (display->display == NULL) {
+    g_free (display);
+    return NULL;
+  }
+
+  usable = glv_display_check_features (display);
+  if (!usable) {
+    g_free (display);
+    return NULL;
+  }
+
+  display->lock = g_mutex_new ();
+
+  return display;
+}
+
+static gboolean
+glv_display_check_features (GLVideoDisplay * display)
+{
+  gboolean ret;
+  XVisualInfo *visinfo;
+  Screen *screen;
+  Window root;
+  int scrnum;
+  int attrib[] = { GLX_RGBA, GLX_DOUBLEBUFFER, GLX_RED_SIZE, 8,
+    GLX_GREEN_SIZE, 8, GLX_BLUE_SIZE, 8, None
+  };
+  XSetWindowAttributes attr;
+  int error_base;
+  int event_base;
+  int mask;
+  const char *extstring;
+  Window window;
+
+  screen = XDefaultScreenOfDisplay (display->display);
+  scrnum = XScreenNumberOfScreen (screen);
+  root = XRootWindow (display->display, scrnum);
+
+  ret = glXQueryExtension (display->display, &error_base, &event_base);
+  if (!ret) {
+    GST_DEBUG ("No GLX extension");
+    return FALSE;
+  }
+
+  visinfo = glXChooseVisual (display->display, scrnum, attrib);
+  if (visinfo == NULL) {
+    GST_DEBUG ("No usable visual");
+    return FALSE;
+  }
+
+  display->visinfo = visinfo;
+
+  display->context = glXCreateContext (display->display, visinfo, NULL, True);
+
+  attr.background_pixel = 0;
+  attr.border_pixel = 0;
+  attr.colormap = XCreateColormap (display->display, root,
+      visinfo->visual, AllocNone);
+  attr.event_mask = StructureNotifyMask | ExposureMask;
+  attr.override_redirect = True;
+
+  mask = CWBackPixel | CWBorderPixel | CWColormap | CWOverrideRedirect;
+
+  window = XCreateWindow (display->display, root, 0, 0,
+      100, 100, 0, visinfo->depth, InputOutput, visinfo->visual, mask, &attr);
+
+  XSync (display->display, FALSE);
+
+  glXMakeCurrent (display->display, window, display->context);
+
+  glGetIntegerv (GL_MAX_TEXTURE_SIZE, &display->max_texture_size);
+
+  extstring = (const char *) glGetString (GL_EXTENSIONS);
+#ifdef GL_YCBCR_MESA
+  if (strstr (extstring, "GL_MESA_ycbcr_texture")) {
+    display->have_ycbcr_texture = TRUE;
+  } else {
+    display->have_ycbcr_texture = FALSE;
+  }
+#else
+  display->have_ycbcr_texture = FALSE;
+#endif
+
+  glXMakeCurrent (display->display, None, NULL);
+  XDestroyWindow (display->display, window);
+
+  return TRUE;
+}
+
+void
+glv_display_free (GLVideoDisplay * display)
+{
+  /* sure hope nobody is using it as it's being freed */
+  g_mutex_lock (display->lock);
+  g_mutex_unlock (display->lock);
+
+  if (display->context) {
+    glXDestroyContext (display->display, display->context);
+  }
+  if (display->visinfo) {
+    XFree (display->visinfo);
+  }
+  if (display->display) {
+    XCloseDisplay (display->display);
+  }
+
+  g_mutex_free (display->lock);
+
+  g_free (display);
+}
+
+
+/* drawable */
+
+GLVideoDrawable *
+glv_drawable_new_window (GLVideoDisplay * display)
+{
+  GLVideoDrawable *drawable;
+  XSetWindowAttributes attr = { 0 };
+  int scrnum;
+  int mask;
+  Window root;
+  Screen *screen;
+
+  drawable = g_malloc0 (sizeof (GLVideoDrawable));
+
+  g_mutex_lock (display->lock);
+  drawable->display = display;
+
+  screen = XDefaultScreenOfDisplay (display->display);
+  scrnum = XScreenNumberOfScreen (screen);
+  root = XRootWindow (display->display, scrnum);
+
+  attr.background_pixel = 0;
+  attr.border_pixel = 0;
+  attr.colormap = XCreateColormap (display->display, root,
+      display->visinfo->visual, AllocNone);
+  attr.override_redirect = False;
+#if 0
+  if (display->parent_window) {
+    attr.override_redirect = True;
+  }
+#endif
+
+  mask = CWBackPixel | CWBorderPixel | CWColormap | CWOverrideRedirect;
+
+  drawable->window = XCreateWindow (display->display,
+      root, 0, 0, 100, 100,
+      0, display->visinfo->depth, InputOutput,
+      display->visinfo->visual, mask, &attr);
+  XMapWindow (display->display, drawable->window);
+  drawable->destroy_on_free = TRUE;
+
+  g_mutex_unlock (display->lock);
+
+  return drawable;
+}
+
+GLVideoDrawable *
+glv_drawable_new_root_window (GLVideoDisplay * display)
+{
+  GLVideoDrawable *drawable;
+  int scrnum;
+  Screen *screen;
+
+  drawable = g_malloc0 (sizeof (GLVideoDrawable));
+
+  g_mutex_lock (display->lock);
+  drawable->display = display;
+
+  screen = XDefaultScreenOfDisplay (display->display);
+  scrnum = XScreenNumberOfScreen (screen);
+
+  drawable->window = XRootWindow (display->display, scrnum);
+  drawable->destroy_on_free = FALSE;
+  g_mutex_unlock (display->lock);
+
+  return drawable;
+}
+
+GLVideoDrawable *
+glv_drawable_new_from_window (GLVideoDisplay * display, Window window)
+{
+  GLVideoDrawable *drawable;
+
+  drawable = g_malloc0 (sizeof (GLVideoDrawable));
+
+  g_mutex_lock (display->lock);
+  drawable->display = display;
+
+  drawable->window = window;
+  drawable->destroy_on_free = FALSE;
+
+  g_mutex_unlock (display->lock);
+  return drawable;
+}
+
+void
+glv_drawable_free (GLVideoDrawable * drawable)
+{
+
+  g_mutex_lock (drawable->display->lock);
+  if (drawable->destroy_on_free) {
+    XDestroyWindow (drawable->display->display, drawable->window);
+  }
+  g_mutex_unlock (drawable->display->lock);
+
+  g_free (drawable);
+}
+
+void
+glv_drawable_lock (GLVideoDrawable * drawable)
+{
+  g_mutex_lock (drawable->display->lock);
+  glXMakeCurrent (drawable->display->display, drawable->window,
+      drawable->display->context);
+}
+
+void
+glv_drawable_unlock (GLVideoDrawable * drawable)
+{
+  glXMakeCurrent (drawable->display->display, None, NULL);
+  g_mutex_unlock (drawable->display->lock);
+}
+
+void
+glv_drawable_update_attributes (GLVideoDrawable * drawable)
+{
+  XWindowAttributes attr;
+
+  XGetWindowAttributes (drawable->display->display, drawable->window, &attr);
+  drawable->win_width = attr.width;
+  drawable->win_height = attr.height;
+
+}
+
+void
+glv_drawable_clear (GLVideoDrawable * drawable)
+{
+
+  glv_drawable_lock (drawable);
+
+  glDepthFunc (GL_LESS);
+  glEnable (GL_DEPTH_TEST);
+  glClearColor (0.2, 0.2, 0.2, 1.0);
+  glViewport (0, 0, drawable->win_width, drawable->win_height);
+
+  glv_drawable_unlock (drawable);
+}
+
+
+
+void
+glv_drawable_draw_image (GLVideoDrawable * drawable, GLVideoImageType type,
+    void *data, int width, int height)
+{
+  g_return_if_fail (data != NULL);
+  g_return_if_fail (width > 0);
+  g_return_if_fail (height > 0);
+
+  glv_drawable_lock (drawable);
+
+  glv_drawable_update_attributes (drawable);
+
+  glViewport (0, 0, drawable->win_width, drawable->win_height);
+
+  glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+  glMatrixMode (GL_PROJECTION);
+  glLoadIdentity ();
+
+  glMatrixMode (GL_MODELVIEW);
+  glLoadIdentity ();
+
+  glDisable (GL_CULL_FACE);
+  glEnable (GL_TEXTURE_RECTANGLE_ARB);
+  glEnableClientState (GL_TEXTURE_COORD_ARRAY);
+
+  glColor4f (1, 1, 1, 1);
+
+  glBindTexture (GL_TEXTURE_RECTANGLE_ARB, 1);
+  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP);
+  glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP);
+  glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+
+  switch (type) {
+    case GLVIDEO_IMAGE_TYPE_RGBA:
+      glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, width, height,
+          0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+      glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, width, height,
+          GL_RGBA, GL_UNSIGNED_BYTE, data);
+      break;
+    case GLVIDEO_IMAGE_TYPE_BGRA:
+      glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA, width, height,
+          0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+      glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, width, height,
+          GL_BGRA, GL_UNSIGNED_BYTE, data);
+      break;
+    case GLVIDEO_IMAGE_TYPE_YUY2:
+      glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_YCBCR_MESA, width, height,
+          0, GL_YCBCR_MESA, GL_UNSIGNED_SHORT_8_8_REV_MESA, NULL);
+      glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, width, height,
+          GL_YCBCR_MESA, GL_UNSIGNED_SHORT_8_8_REV_MESA, data);
+      break;
+    case GLVIDEO_IMAGE_TYPE_UYVY:
+      glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_YCBCR_MESA, width, height,
+          0, GL_YCBCR_MESA, GL_UNSIGNED_SHORT_8_8_REV_MESA, NULL);
+      glTexSubImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, width, height,
+          GL_YCBCR_MESA, GL_UNSIGNED_SHORT_8_8_MESA, data);
+    default:
+      g_assert_not_reached ();
+  }
+
+  glColor4f (1, 0, 1, 1);
+  glBegin (GL_QUADS);
+
+  glNormal3f (0, 0, -1);
+
+  glTexCoord2f (width, 0);
+  glVertex3f (1.0, 1.0, 0);
+  glTexCoord2f (0, 0);
+  glVertex3f (-1.0, 1.0, 0);
+  glTexCoord2f (0, height);
+  glVertex3f (-1.0, -1.0, 0);
+  glTexCoord2f (width, height);
+  glVertex3f (1.0, -1.0, 0);
+  glEnd ();
+
+  glFlush ();
+  glXSwapBuffers (drawable->display->display, drawable->window);
+
+  glv_drawable_unlock (drawable);
+}