2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2003> David Schleef <ds@schleef.org>
4 * Copyright (C) <2009> Young-Ho Cha <ganadist@gmail.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
24 * SECTION:element-textrender
26 * @see_also: #GstTextOverlay
28 * This plugin renders text received on the text sink pad to a video
29 * buffer (retaining the alpha channel), so it can later be overlayed
30 * on top of video streams using other elements.
32 * The text can contain newline characters. (FIXME: What about text
33 * wrapping? It does not make sense in this context)
35 * ## Example launch lines
37 * gst-launch-1.0 -v filesrc location=subtitles.srt ! subparse ! textrender ! videoconvert ! autovideosink
47 #include <gst/video/video.h>
49 #include "gsttextrender.h"
52 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
53 # define CAIRO_ARGB_A 3
54 # define CAIRO_ARGB_R 2
55 # define CAIRO_ARGB_G 1
56 # define CAIRO_ARGB_B 0
58 # define CAIRO_ARGB_A 0
59 # define CAIRO_ARGB_R 1
60 # define CAIRO_ARGB_G 2
61 # define CAIRO_ARGB_B 3
64 GST_DEBUG_CATEGORY_EXTERN (pango_debug);
65 #define GST_CAT_DEFAULT pango_debug
67 #define MINIMUM_OUTLINE_OFFSET 1.0
69 #define DEFAULT_PROP_VALIGNMENT GST_TEXT_RENDER_VALIGN_BASELINE
70 #define DEFAULT_PROP_HALIGNMENT GST_TEXT_RENDER_HALIGN_CENTER
71 #define DEFAULT_PROP_LINE_ALIGNMENT GST_TEXT_RENDER_LINE_ALIGN_CENTER
72 #define DEFAULT_PROP_XPAD 25
73 #define DEFAULT_PROP_YPAD 25
75 #define DEFAULT_RENDER_WIDTH 720
76 #define DEFAULT_RENDER_HEIGHT 576
89 #define VIDEO_FORMATS "{ AYUV, ARGB } "
91 static GstStaticPadTemplate src_template_factory =
92 GST_STATIC_PAD_TEMPLATE ("src",
95 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (VIDEO_FORMATS))
98 static GstStaticPadTemplate sink_template_factory =
99 GST_STATIC_PAD_TEMPLATE ("sink",
102 GST_STATIC_CAPS ("text/x-raw, format = { pango-markup, utf8 }")
105 #define GST_TYPE_TEXT_RENDER_VALIGN (gst_text_render_valign_get_type())
107 gst_text_render_valign_get_type (void)
109 static GType text_render_valign_type = 0;
110 static const GEnumValue text_render_valign[] = {
111 {GST_TEXT_RENDER_VALIGN_BASELINE, "baseline", "baseline"},
112 {GST_TEXT_RENDER_VALIGN_BOTTOM, "bottom", "bottom"},
113 {GST_TEXT_RENDER_VALIGN_TOP, "top", "top"},
117 if (!text_render_valign_type) {
118 text_render_valign_type =
119 g_enum_register_static ("GstTextRenderVAlign", text_render_valign);
121 return text_render_valign_type;
124 #define GST_TYPE_TEXT_RENDER_HALIGN (gst_text_render_halign_get_type())
126 gst_text_render_halign_get_type (void)
128 static GType text_render_halign_type = 0;
129 static const GEnumValue text_render_halign[] = {
130 {GST_TEXT_RENDER_HALIGN_LEFT, "left", "left"},
131 {GST_TEXT_RENDER_HALIGN_CENTER, "center", "center"},
132 {GST_TEXT_RENDER_HALIGN_RIGHT, "right", "right"},
136 if (!text_render_halign_type) {
137 text_render_halign_type =
138 g_enum_register_static ("GstTextRenderHAlign", text_render_halign);
140 return text_render_halign_type;
143 #define GST_TYPE_TEXT_RENDER_LINE_ALIGN (gst_text_render_line_align_get_type())
145 gst_text_render_line_align_get_type (void)
147 static GType text_render_line_align_type = 0;
148 static const GEnumValue text_render_line_align[] = {
149 {GST_TEXT_RENDER_LINE_ALIGN_LEFT, "left", "left"},
150 {GST_TEXT_RENDER_LINE_ALIGN_CENTER, "center", "center"},
151 {GST_TEXT_RENDER_LINE_ALIGN_RIGHT, "right", "right"},
155 if (!text_render_line_align_type) {
156 text_render_line_align_type =
157 g_enum_register_static ("GstTextRenderLineAlign",
158 text_render_line_align);
160 return text_render_line_align_type;
163 static void gst_text_render_adjust_values_with_fontdesc (GstTextRender *
164 render, PangoFontDescription * desc);
166 #define gst_text_render_parent_class parent_class
167 G_DEFINE_TYPE (GstTextRender, gst_text_render, GST_TYPE_ELEMENT);
169 static void gst_text_render_finalize (GObject * object);
170 static void gst_text_render_set_property (GObject * object,
171 guint prop_id, const GValue * value, GParamSpec * pspec);
172 static void gst_text_render_get_property (GObject * object,
173 guint prop_id, GValue * value, GParamSpec * pspec);
176 gst_text_render_class_init (GstTextRenderClass * klass)
178 GObjectClass *gobject_class;
179 GstElementClass *gstelement_class;
181 gobject_class = (GObjectClass *) klass;
182 gstelement_class = (GstElementClass *) klass;
184 parent_class = g_type_class_peek_parent (klass);
186 gobject_class->finalize = gst_text_render_finalize;
187 gobject_class->set_property = gst_text_render_set_property;
188 gobject_class->get_property = gst_text_render_get_property;
190 gst_element_class_add_static_pad_template (gstelement_class,
191 &src_template_factory);
192 gst_element_class_add_static_pad_template (gstelement_class,
193 &sink_template_factory);
195 gst_element_class_set_static_metadata (gstelement_class, "Text renderer",
196 "Filter/Editor/Video",
197 "Renders a text string to an image bitmap",
198 "David Schleef <ds@schleef.org>, "
199 "GStreamer maintainers <gstreamer-devel@lists.freedesktop.org>");
201 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FONT_DESC,
202 g_param_spec_string ("font-desc", "font description",
203 "Pango font description of font "
204 "to be used for rendering. "
205 "See documentation of "
206 "pango_font_description_from_string"
207 " for syntax.", "", G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
208 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_VALIGNMENT,
209 g_param_spec_enum ("valignment", "vertical alignment",
210 "Vertical alignment of the text", GST_TYPE_TEXT_RENDER_VALIGN,
211 DEFAULT_PROP_VALIGNMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
212 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HALIGNMENT,
213 g_param_spec_enum ("halignment", "horizontal alignment",
214 "Horizontal alignment of the text", GST_TYPE_TEXT_RENDER_HALIGN,
215 DEFAULT_PROP_HALIGNMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
216 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_XPAD,
217 g_param_spec_int ("xpad", "horizontal paddding",
218 "Horizontal paddding when using left/right alignment", 0, G_MAXINT,
219 DEFAULT_PROP_XPAD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
220 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_YPAD,
221 g_param_spec_int ("ypad", "vertical padding",
222 "Vertical padding when using top/bottom alignment", 0, G_MAXINT,
223 DEFAULT_PROP_YPAD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
224 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_LINE_ALIGNMENT,
225 g_param_spec_enum ("line-alignment", "line alignment",
226 "Alignment of text lines relative to each other.",
227 GST_TYPE_TEXT_RENDER_LINE_ALIGN, DEFAULT_PROP_LINE_ALIGNMENT,
228 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
230 gst_type_mark_as_plugin_api (GST_TYPE_TEXT_RENDER_HALIGN, 0);
231 gst_type_mark_as_plugin_api (GST_TYPE_TEXT_RENDER_VALIGN, 0);
232 gst_type_mark_as_plugin_api (GST_TYPE_TEXT_RENDER_LINE_ALIGN, 0);
236 gst_text_render_adjust_values_with_fontdesc (GstTextRender * render,
237 PangoFontDescription * desc)
239 gint font_size = pango_font_description_get_size (desc) / PANGO_SCALE;
241 render->shadow_offset = (double) (font_size) / 13.0;
242 render->outline_offset = (double) (font_size) / 15.0;
243 if (render->outline_offset < MINIMUM_OUTLINE_OFFSET)
244 render->outline_offset = MINIMUM_OUTLINE_OFFSET;
248 gst_text_render_render_pangocairo (GstTextRender * render)
251 cairo_surface_t *surface;
253 cairo_surface_t *surface_shadow;
254 PangoRectangle ink_rect, logical_rect;
257 pango_layout_get_pixel_extents (render->layout, &ink_rect, &logical_rect);
259 width = logical_rect.width + render->shadow_offset;
260 height = logical_rect.height + logical_rect.y + render->shadow_offset;
262 surface_shadow = cairo_image_surface_create (CAIRO_FORMAT_A8, width, height);
263 cr_shadow = cairo_create (surface_shadow);
265 /* clear shadow surface */
266 cairo_set_operator (cr_shadow, CAIRO_OPERATOR_CLEAR);
267 cairo_paint (cr_shadow);
268 cairo_set_operator (cr_shadow, CAIRO_OPERATOR_OVER);
270 /* draw shadow text */
271 cairo_save (cr_shadow);
272 cairo_set_source_rgba (cr_shadow, 0.0, 0.0, 0.0, 0.5);
273 cairo_translate (cr_shadow, render->shadow_offset, render->shadow_offset);
274 pango_cairo_show_layout (cr_shadow, render->layout);
275 cairo_restore (cr_shadow);
277 /* draw outline text */
278 cairo_save (cr_shadow);
279 cairo_set_source_rgb (cr_shadow, 0.0, 0.0, 0.0);
280 cairo_set_line_width (cr_shadow, render->outline_offset);
281 pango_cairo_layout_path (cr_shadow, render->layout);
282 cairo_stroke (cr_shadow);
283 cairo_restore (cr_shadow);
285 cairo_destroy (cr_shadow);
287 render->text_image = g_realloc (render->text_image, 4 * width * height);
289 surface = cairo_image_surface_create_for_data (render->text_image,
290 CAIRO_FORMAT_ARGB32, width, height, width * 4);
291 cr = cairo_create (surface);
292 cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
294 cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
296 /* set default color */
297 cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
301 pango_cairo_show_layout (cr, render->layout);
304 /* composite shadow with offset */
305 cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OVER);
306 cairo_set_source_surface (cr, surface_shadow, 0.0, 0.0);
310 cairo_surface_destroy (surface_shadow);
311 cairo_surface_destroy (surface);
312 render->image_width = width;
313 render->image_height = height;
317 gst_text_render_check_argb (GstTextRender * render)
320 peer_caps = gst_pad_get_allowed_caps (render->srcpad);
321 if (G_LIKELY (peer_caps)) {
324 n = gst_caps_get_size (peer_caps);
325 GST_DEBUG_OBJECT (render, "peer allowed caps (%u structure(s)) are %"
326 GST_PTR_FORMAT, n, peer_caps);
328 /* Check if AYUV or ARGB is first */
329 for (i = 0; i < n; i++) {
331 GstVideoFormat vformat;
332 const GstVideoFormatInfo *info;
335 s = gst_caps_get_structure (peer_caps, i);
336 if (!gst_structure_has_name (s, "video/x-raw"))
339 fmt = gst_structure_get_string (s, "format");
343 vformat = gst_video_format_from_string (fmt);
344 info = gst_video_format_get_info (vformat);
348 render->use_ARGB = GST_VIDEO_FORMAT_INFO_IS_RGB (info);
350 gst_caps_unref (peer_caps);
355 gst_text_render_src_setcaps (GstTextRender * render, GstCaps * caps)
357 GstStructure *structure;
359 gint width = 0, height = 0;
361 structure = gst_caps_get_structure (caps, 0);
362 gst_structure_get_int (structure, "width", &width);
363 gst_structure_get_int (structure, "height", &height);
365 GST_DEBUG_OBJECT (render, "Got caps %" GST_PTR_FORMAT, caps);
367 if (width >= render->image_width && height >= render->image_height) {
368 render->width = width;
369 render->height = height;
372 gst_text_render_check_argb (render);
374 ret = gst_pad_set_caps (render->srcpad, caps);
380 gst_text_render_fixate_caps (GstTextRender * render, GstCaps * caps)
384 caps = gst_caps_truncate (caps);
386 caps = gst_caps_make_writable (caps);
387 s = gst_caps_get_structure (caps, 0);
389 GST_DEBUG ("Fixating caps %" GST_PTR_FORMAT, caps);
390 gst_structure_fixate_field_nearest_int (s, "width", MAX (render->image_width,
391 DEFAULT_RENDER_WIDTH));
392 gst_structure_fixate_field_nearest_int (s, "height",
393 MAX (render->image_height + render->ypad, DEFAULT_RENDER_HEIGHT));
394 caps = gst_caps_fixate (caps);
395 GST_DEBUG ("Fixated to %" GST_PTR_FORMAT, caps);
400 #define CAIRO_UNPREMULTIPLY(a,r,g,b) G_STMT_START { \
401 b = (a > 0) ? MIN ((b * 255 + a / 2) / a, 255) : 0; \
402 g = (a > 0) ? MIN ((g * 255 + a / 2) / a, 255) : 0; \
403 r = (a > 0) ? MIN ((r * 255 + a / 2) / a, 255) : 0; \
407 gst_text_renderer_image_to_ayuv (GstTextRender * render, guchar * pixbuf,
408 int xpos, int ypos, int stride)
410 int y; /* text bitmap coordinates */
415 width = render->image_width;
416 height = render->image_height;
418 for (y = 0; y < height && ypos + y < render->height; y++) {
420 p = pixbuf + (ypos + y) * stride + xpos * 4;
421 bitp = render->text_image + y * width * 4;
422 for (n = 0; n < width && n < render->width; n++) {
423 b = bitp[CAIRO_ARGB_B];
424 g = bitp[CAIRO_ARGB_G];
425 r = bitp[CAIRO_ARGB_R];
426 a = bitp[CAIRO_ARGB_A];
429 /* Cairo uses pre-multiplied ARGB, unpremultiply it */
430 CAIRO_UNPREMULTIPLY (a, r, g, b);
433 *p++ = CLAMP ((int) (((19595 * r) >> 16) + ((38470 * g) >> 16) +
434 ((7471 * b) >> 16)), 0, 255);
435 *p++ = CLAMP ((int) (-((11059 * r) >> 16) - ((21709 * g) >> 16) +
436 ((32768 * b) >> 16) + 128), 0, 255);
437 *p++ = CLAMP ((int) (((32768 * r) >> 16) - ((27439 * g) >> 16) -
438 ((5329 * b) >> 16) + 128), 0, 255);
444 gst_text_renderer_image_to_argb (GstTextRender * render, guchar * pixbuf,
445 int xpos, int ypos, int stride)
451 width = render->image_width;
452 height = render->image_height;
454 for (i = 0; i < height && ypos + i < render->height; i++) {
455 p = pixbuf + (ypos + i) * stride + xpos * 4;
456 bitp = render->text_image + i * width * 4;
457 for (j = 0; j < width && j < render->width; j++) {
458 p[0] = bitp[CAIRO_ARGB_A];
459 p[1] = bitp[CAIRO_ARGB_R];
460 p[2] = bitp[CAIRO_ARGB_G];
461 p[3] = bitp[CAIRO_ARGB_B];
463 /* Cairo uses pre-multiplied ARGB, unpremultiply it */
464 CAIRO_UNPREMULTIPLY (p[0], p[1], p[2], p[3]);
473 gst_text_render_renegotiate (GstTextRender * render)
475 GstCaps *caps = NULL, *padcaps;
476 GstFlowReturn ret = GST_FLOW_OK;
478 gst_text_render_check_argb (render);
480 padcaps = gst_pad_query_caps (render->srcpad, NULL);
481 caps = gst_pad_peer_query_caps (render->srcpad, padcaps);
482 gst_caps_unref (padcaps);
484 if (!caps || gst_caps_is_empty (caps)) {
485 GST_ELEMENT_ERROR (render, CORE, NEGOTIATION, (NULL), (NULL));
486 ret = GST_FLOW_ERROR;
490 caps = gst_text_render_fixate_caps (render, caps);
492 if (!gst_text_render_src_setcaps (render, caps)) {
493 GST_ELEMENT_ERROR (render, CORE, NEGOTIATION, (NULL), (NULL));
494 ret = GST_FLOW_ERROR;
500 gst_caps_unref (caps);
505 gst_text_render_chain (GstPad * pad, GstObject * parent, GstBuffer * inbuf)
507 GstTextRender *render;
516 render = GST_TEXT_RENDER (parent);
518 gst_buffer_map (inbuf, &map, GST_MAP_READ);
522 /* somehow pango barfs over "\0" buffers... */
524 (data[size - 1] == '\r' ||
525 data[size - 1] == '\n' || data[size - 1] == '\0')) {
530 GST_DEBUG ("rendering '%*s'", (gint) size, data);
531 pango_layout_set_markup (render->layout, (gchar *) data, size);
532 gst_text_render_render_pangocairo (render);
533 gst_buffer_unmap (inbuf, &map);
535 if (gst_pad_check_reconfigure (render->srcpad)
536 || !gst_pad_has_current_caps (render->srcpad)) {
537 ret = gst_text_render_renegotiate (render);
538 if (ret != GST_FLOW_OK)
542 if (render->segment_event) {
543 gst_pad_push_event (render->srcpad, render->segment_event);
544 render->segment_event = NULL;
547 GST_DEBUG ("Allocating buffer WxH = %dx%d", render->width, render->height);
548 outbuf = gst_buffer_new_and_alloc (render->width * render->height * 4);
550 gst_buffer_copy_into (outbuf, inbuf, GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
552 gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
556 if (render->use_ARGB) {
557 memset (data, 0, render->width * render->height * 4);
559 for (n = 0; n < render->width * render->height; n++) {
560 data[n * 4] = data[n * 4 + 1] = 0;
561 data[n * 4 + 2] = data[n * 4 + 3] = 128;
565 switch (render->halign) {
566 case GST_TEXT_RENDER_HALIGN_LEFT:
569 case GST_TEXT_RENDER_HALIGN_CENTER:
570 xpos = (render->width - render->image_width) / 2;
572 case GST_TEXT_RENDER_HALIGN_RIGHT:
573 xpos = render->width - render->image_width - render->xpad;
579 switch (render->valign) {
580 case GST_TEXT_RENDER_VALIGN_BOTTOM:
581 ypos = render->height - render->image_height - render->ypad;
583 case GST_TEXT_RENDER_VALIGN_BASELINE:
584 ypos = render->height - (render->image_height + render->ypad);
586 case GST_TEXT_RENDER_VALIGN_TOP:
594 if (render->text_image) {
595 if (render->use_ARGB) {
596 gst_text_renderer_image_to_argb (render, data, xpos, ypos,
599 gst_text_renderer_image_to_ayuv (render, data, xpos, ypos,
603 gst_buffer_unmap (outbuf, &map);
605 ret = gst_pad_push (render->srcpad, outbuf);
608 gst_buffer_unref (inbuf);
614 gst_text_render_event (GstPad * pad, GstObject * parent, GstEvent * event)
616 GstTextRender *render = GST_TEXT_RENDER (parent);
619 switch (GST_EVENT_TYPE (event)) {
620 case GST_EVENT_SEGMENT:
622 if (gst_pad_has_current_caps (render->srcpad)) {
623 ret = gst_pad_push_event (render->srcpad, event);
625 gst_event_replace (&render->segment_event, event);
626 gst_event_unref (event);
631 ret = gst_pad_push_event (render->srcpad, event);
639 gst_text_render_finalize (GObject * object)
641 GstTextRender *render = GST_TEXT_RENDER (object);
643 gst_event_replace (&render->segment_event, NULL);
645 g_free (render->text_image);
648 g_object_unref (render->layout);
650 if (render->pango_context)
651 g_object_unref (render->pango_context);
653 G_OBJECT_CLASS (parent_class)->finalize (object);
657 gst_text_render_init (GstTextRender * render)
659 GstPadTemplate *template;
660 PangoFontMap *fontmap;
663 template = gst_static_pad_template_get (&sink_template_factory);
664 render->sinkpad = gst_pad_new_from_template (template, "sink");
665 gst_object_unref (template);
666 gst_pad_set_chain_function (render->sinkpad,
667 GST_DEBUG_FUNCPTR (gst_text_render_chain));
668 gst_pad_set_event_function (render->sinkpad,
669 GST_DEBUG_FUNCPTR (gst_text_render_event));
671 gst_element_add_pad (GST_ELEMENT (render), render->sinkpad);
674 template = gst_static_pad_template_get (&src_template_factory);
675 render->srcpad = gst_pad_new_from_template (template, "src");
676 gst_object_unref (template);
678 gst_element_add_pad (GST_ELEMENT (render), render->srcpad);
680 fontmap = pango_cairo_font_map_new ();
681 render->pango_context =
682 pango_font_map_create_context (PANGO_FONT_MAP (fontmap));
683 g_object_unref (fontmap);
685 render->line_align = DEFAULT_PROP_LINE_ALIGNMENT;
686 render->layout = pango_layout_new (render->pango_context);
687 pango_layout_set_alignment (render->layout,
688 (PangoAlignment) render->line_align);
690 render->halign = DEFAULT_PROP_HALIGNMENT;
691 render->valign = DEFAULT_PROP_VALIGNMENT;
692 render->xpad = DEFAULT_PROP_XPAD;
693 render->ypad = DEFAULT_PROP_YPAD;
695 render->width = DEFAULT_RENDER_WIDTH;
696 render->height = DEFAULT_RENDER_HEIGHT;
698 render->use_ARGB = FALSE;
702 gst_text_render_set_property (GObject * object, guint prop_id,
703 const GValue * value, GParamSpec * pspec)
705 GstTextRender *render = GST_TEXT_RENDER (object);
708 case PROP_VALIGNMENT:
709 render->valign = g_value_get_enum (value);
711 case PROP_HALIGNMENT:
712 render->halign = g_value_get_enum (value);
714 case PROP_LINE_ALIGNMENT:
715 render->line_align = g_value_get_enum (value);
716 pango_layout_set_alignment (render->layout,
717 (PangoAlignment) render->line_align);
720 render->xpad = g_value_get_int (value);
723 render->ypad = g_value_get_int (value);
727 PangoFontDescription *desc;
729 desc = pango_font_description_from_string (g_value_get_string (value));
731 GST_LOG ("font description set: %s", g_value_get_string (value));
732 GST_OBJECT_LOCK (render);
733 pango_layout_set_font_description (render->layout, desc);
734 gst_text_render_adjust_values_with_fontdesc (render, desc);
735 pango_font_description_free (desc);
736 gst_text_render_render_pangocairo (render);
737 GST_OBJECT_UNLOCK (render);
739 GST_WARNING ("font description parse failed: %s",
740 g_value_get_string (value));
751 gst_text_render_get_property (GObject * object, guint prop_id,
752 GValue * value, GParamSpec * pspec)
754 GstTextRender *render = GST_TEXT_RENDER (object);
757 case PROP_VALIGNMENT:
758 g_value_set_enum (value, render->valign);
760 case PROP_HALIGNMENT:
761 g_value_set_enum (value, render->halign);
763 case PROP_LINE_ALIGNMENT:
764 g_value_set_enum (value, render->line_align);
767 g_value_set_int (value, render->xpad);
770 g_value_set_int (value, render->ypad);
773 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);