[PATCH] dri3: Free resources when drawable is destroyed.

[Keith Packard]

Always nice to clean up after ourselves.

Signed-off-by: Keith Packard <keithp at keithp.com>
---

Ok, so not having this in the dri3 code led to a bit of extra memory
usage in apps and the X server.

 src/glx/dri3_glx.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/glx/dri3_glx.c b/src/glx/dri3_glx.c
index 239d58b..669f0bb 100644
--- a/src/glx/dri3_glx.c
+++ b/src/glx/dri3_glx.c
@@ -266,13 +266,25 @@ dri3_create_context(struct glx_screen *base,
 }
 
 static void
+dri3_free_render_buffer(struct dri3_drawable *pdraw, struct dri3_buffer *buffer);
+
+static void
 dri3_destroy_drawable(__GLXDRIdrawable *base)
 {
    struct dri3_screen *psc = (struct dri3_screen *) base->psc;
    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
+   xcb_connection_t     *c = XGetXCBConnection(pdraw->base.psc->dpy);
+   int i;
 
    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 
+   for (i = 0; i < DRI3_NUM_BUFFERS; i++) {
+      if (pdraw->buffers[i])
+         dri3_free_render_buffer(pdraw, pdraw->buffers[i]);
+   }
+
+   if (pdraw->special_event)
+      xcb_unregister_for_special_event(c, pdraw->special_event);
    free(pdraw);
 }
 
@@ -736,6 +748,7 @@ dri3_alloc_render_buffer(struct glx_screen *glx_screen, Drawable draw,
                           fence_fd);
 
    buffer->pixmap = pixmap;
+   buffer->own_pixmap = true;
    buffer->sync_fence = sync_fence;
    buffer->shm_fence = shm_fence;
    buffer->width = width;
@@ -769,7 +782,8 @@ dri3_free_render_buffer(struct dri3_drawable *pdraw, struct dri3_buffer *buffer)
    struct dri3_screen   *psc = (struct dri3_screen *) pdraw->base.psc;
    xcb_connection_t     *c = XGetXCBConnection(pdraw->base.psc->dpy);
 
-   xcb_free_pixmap(c, buffer->pixmap);
+   if (buffer->own_pixmap)
+      xcb_free_pixmap(c, buffer->pixmap);
    xcb_sync_destroy_fence(c, buffer->sync_fence);
    xshmfence_unmap_shm(buffer->shm_fence);
    (*psc->image->destroyImage)(buffer->image);
@@ -988,6 +1002,7 @@ dri3_get_pixmap_buffer(__DRIdrawable *driDrawable,
       goto no_image;
 
    buffer->pixmap = pixmap;
+   buffer->own_pixmap = false;
    buffer->width = bp_reply->width;
    buffer->height = bp_reply->height;
    buffer->buffer_type = buffer_type;
-- 
1.8.4.2