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waylandsink: Properly draw black border in absence of viewporter

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When we don't have a viewporter (scaling support), we can't use the
1x1 scaleup image trick. Instead, we need to allocate a buffer with
the same size as the area that need to have black background.
This commit is contained in:
Nicolas Dufresne 2016-09-22 15:35:44 -04:00
parent 1489e73df4
commit ecf88d0d43
2 changed files with 60 additions and 36 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

86
ext/wayland/wlwindow.c
View file

@ -102,11 +102,6 @@ static GstWlWindow *
gst_wl_window_new_internal (GstWlDisplay * display)
{
GstWlWindow *window;
GstVideoInfo info;
GstBuffer *buf;
GstMapInfo mapinfo;
struct wl_buffer *wlbuf;
GstWlBuffer *gwlbuf;
struct wl_region *region;
window = g_object_new (GST_TYPE_WL_WINDOW, NULL);
@ -132,30 +127,6 @@ gst_wl_window_new_internal (GstWlDisplay * display)
window->video_surface);
}
/* draw the area_subsurface */
gst_video_info_set_format (&info,
/* we want WL_SHM_FORMAT_XRGB8888 */
#if G_BYTE_ORDER == G_BIG_ENDIAN
GST_VIDEO_FORMAT_xRGB,
#else
GST_VIDEO_FORMAT_BGRx,
#endif
1, 1);
buf = gst_buffer_new_allocate (gst_wl_shm_allocator_get (), info.size, NULL);
gst_buffer_map (buf, &mapinfo, GST_MAP_WRITE);
*((guint32 *) mapinfo.data) = 0; /* paint it black */
gst_buffer_unmap (buf, &mapinfo);
wlbuf =
gst_wl_shm_memory_construct_wl_buffer (gst_buffer_peek_memory (buf, 0),
display, &info);
gwlbuf = gst_buffer_add_wl_buffer (buf, wlbuf, display);
gst_wl_buffer_attach (gwlbuf, window->area_surface);
/* at this point, the GstWlBuffer keeps the buffer
* alive and will free it on wl_buffer::release */
gst_buffer_unref (buf);
/* do not accept input */
region = wl_compositor_create_region (display->compositor);
wl_surface_set_input_region (window->area_surface, region);
@ -261,7 +232,6 @@ gst_wl_window_resize_video_surface (GstWlWindow * window, gboolean commit)
wl_subsurface_set_position (window->video_subsurface, res.x, res.y);
if (commit) {
wl_surface_damage (window->video_surface, 0, 0, res.w, res.h);
wl_surface_commit (window->video_surface);
@ -278,8 +248,7 @@ gst_wl_window_resize_video_surface (GstWlWindow * window, gboolean commit)
}
/* this is saved for use in wl_surface_damage */
window->surface_width = res.w;
window->surface_height = res.h;
window->video_rectangle = res;
}
void
@ -300,8 +269,8 @@ gst_wl_window_render (GstWlWindow * window, GstWlBuffer * buffer,
else
wl_surface_attach (window->video_surface, NULL, 0, 0);
wl_surface_damage (window->video_surface, 0, 0, window->surface_width,
window->surface_height);
wl_surface_damage (window->video_surface, 0, 0, window->video_rectangle.w,
window->video_rectangle.h);
wl_surface_commit (window->video_surface);
if (G_UNLIKELY (info)) {
@ -316,6 +285,53 @@ gst_wl_window_render (GstWlWindow * window, GstWlBuffer * buffer,
wl_display_flush (window->display->display);
}
/* Update the buffer used to draw black borders. When we have viewporter
* support, this is a scaled up 1x1 image, and without we need an black image
* the size of the rendering areay. */
static void
gst_wl_window_update_borders (GstWlWindow * window)
{
GstVideoFormat format;
GstVideoInfo info;
gint width, height;
GstBuffer *buf;
struct wl_buffer *wlbuf;
GstWlBuffer *gwlbuf;
if (window->no_border_update)
return;
if (window->display->viewporter) {
width = height = 1;
window->no_border_update = TRUE;
} else {
width = window->render_rectangle.w;
height = window->render_rectangle.h;
}
/* we want WL_SHM_FORMAT_XRGB8888 */
#if G_BYTE_ORDER == G_BIG_ENDIAN
format = GST_VIDEO_FORMAT_xRGB;
#else
format = GST_VIDEO_FORMAT_BGRx;
#endif
/* draw the area_subsurface */
gst_video_info_set_format (&info, format, width, height);
buf = gst_buffer_new_allocate (gst_wl_shm_allocator_get (), info.size, NULL);
gst_buffer_memset (buf, 0, 0, info.size);
wlbuf =
gst_wl_shm_memory_construct_wl_buffer (gst_buffer_peek_memory (buf, 0),
window->display, &info);
gwlbuf = gst_buffer_add_wl_buffer (buf, wlbuf, window->display);
gst_wl_buffer_attach (gwlbuf, window->area_surface);
/* at this point, the GstWlBuffer keeps the buffer
* alive and will free it on wl_buffer::release */
gst_buffer_unref (buf);
}
void
gst_wl_window_set_render_rectangle (GstWlWindow * window, gint x, gint y,
gint w, gint h)
@ -335,6 +351,8 @@ gst_wl_window_set_render_rectangle (GstWlWindow * window, gint x, gint y,
if (window->area_viewport)
wp_viewport_set_destination (window->area_viewport, w, h);
gst_wl_window_update_borders (window);
if (window->video_width != 0) {
wl_subsurface_set_sync (window->video_subsurface);
gst_wl_window_resize_video_surface (window, TRUE);

10
ext/wayland/wlwindow.h
View file

@ -52,10 +52,16 @@ struct _GstWlWindow
/* the size and position of the area_(sub)surface */
GstVideoRectangle render_rectangle;
/* the size and position of the video_subsurface */
GstVideoRectangle video_rectangle;
/* the size of the video in the buffers */
gint video_width, video_height;
/* the size of the video_(sub)surface */
gint surface_width, surface_height;
/* this will be set when viewporter is available and black background has
* already been set on the area_subsurface */
gboolean no_border_update;
};
struct _GstWlWindowClass