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ttmlrender: store PangoLayout in object state

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=780402
This commit is contained in:
Chris Bass 2017-03-21 12:12:28 +00:00 committed by Sebastian Dröge
parent 96e07de31d
commit ac91886ab7
2 changed files with 20 additions and 23 deletions
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37
ext/ttml/gstttmlrender.c
View file

@ -234,6 +234,11 @@ gst_ttml_render_finalize (GObject * object)
render->text_buffer = NULL;
}
if (render->layout) {
g_object_unref (render->layout);
render->layout = NULL;
}
g_mutex_clear (&render->lock);
g_cond_clear (&render->cond);
@ -294,6 +299,8 @@ gst_ttml_render_init (GstTtmlRender * render, GstTtmlRenderClass * klass)
render->text_linked = FALSE;
render->compositions = NULL;
render->layout =
pango_layout_new (GST_TTML_RENDER_GET_CLASS (render)->pango_context);
g_mutex_init (&render->lock);
g_cond_init (&render->cond);
@ -1414,7 +1421,6 @@ gst_ttml_render_draw_text (GstTtmlRender * render, const gchar * text,
guint max_width, PangoAlignment alignment, guint line_height,
guint max_font_size, gboolean wrap)
{
GstTtmlRenderClass *class;
GstTtmlRenderRenderedText *ret;
cairo_surface_t *surface, *cropped_surface;
cairo_t *cairo_state, *cropped_state;
@ -1430,30 +1436,27 @@ gst_ttml_render_draw_text (GstTtmlRender * render, const gchar * text,
ret = g_slice_new0 (GstTtmlRenderRenderedText);
ret->text_image = gst_ttml_render_rendered_image_new_empty ();
class = GST_TTML_RENDER_GET_CLASS (render);
ret->layout = pango_layout_new (class->pango_context);
pango_layout_set_markup (ret->layout, text, strlen (text));
pango_layout_set_markup (render->layout, text, strlen (text));
GST_CAT_DEBUG (ttmlrender_debug, "Layout text: %s",
pango_layout_get_text (ret->layout));
pango_layout_get_text (render->layout));
if (wrap) {
pango_layout_set_width (ret->layout, max_width * PANGO_SCALE);
pango_layout_set_wrap (ret->layout, PANGO_WRAP_WORD_CHAR);
pango_layout_set_width (render->layout, max_width * PANGO_SCALE);
pango_layout_set_wrap (render->layout, PANGO_WRAP_WORD_CHAR);
} else {
pango_layout_set_width (ret->layout, -1);
pango_layout_set_width (render->layout, -1);
}
pango_layout_set_alignment (ret->layout, alignment);
line = pango_layout_get_line_readonly (ret->layout, 0);
pango_layout_set_alignment (render->layout, alignment);
line = pango_layout_get_line_readonly (render->layout, 0);
pango_layout_line_get_pixel_extents (line, NULL, &line_extents);
GST_CAT_LOG (ttmlrender_debug, "Requested line_height: %u", line_height);
spacing = line_height - line_extents.height;
pango_layout_set_spacing (ret->layout, PANGO_SCALE * spacing);
pango_layout_set_spacing (render->layout, PANGO_SCALE * spacing);
GST_CAT_LOG (ttmlrender_debug, "Line spacing set to %d",
pango_layout_get_spacing (ret->layout) / PANGO_SCALE);
pango_layout_get_spacing (render->layout) / PANGO_SCALE);
pango_layout_get_pixel_extents (ret->layout, &ink_rect, &logical_rect);
pango_layout_get_pixel_extents (render->layout, &ink_rect, &logical_rect);
GST_CAT_DEBUG (ttmlrender_debug, "logical_rect.x: %d logical_rect.y: %d "
"logical_rect.width: %d logical_rect.height: %d", logical_rect.x,
logical_rect.y, logical_rect.width, logical_rect.height);
@ -1474,7 +1477,7 @@ gst_ttml_render_draw_text (GstTtmlRender * render, const gchar * text,
/* Render layout. */
cairo_save (cairo_state);
pango_cairo_show_layout (cairo_state, ret->layout);
pango_cairo_show_layout (cairo_state, render->layout);
cairo_restore (cairo_state);
buf_width = bounding_box_x2 - bounding_box_x1;
@ -1944,8 +1947,6 @@ gst_ttml_render_rendered_text_free (GstTtmlRenderRenderedText * text)
{
if (text->text_image)
gst_ttml_render_rendered_image_free (text->text_image);
if (text->layout)
g_object_unref (text->layout);
g_slice_free (GstTtmlRenderRenderedText, text);
}
@ -2004,7 +2005,7 @@ gst_ttml_render_render_text_block (GstTtmlRender * render,
/* Render background rectangles, if any. */
backgrounds = gst_ttml_render_render_element_backgrounds (block, char_ranges,
rendered_text->layout, text_offset - line_padding, 0,
render->layout, text_offset - line_padding, 0,
(guint) round (block->style_set->line_height * max_font_size),
line_padding, rendered_text->horiz_offset);

6
ext/ttml/gstttmlrender.h
View file

@ -62,11 +62,6 @@ struct _GstTtmlRenderRenderedImage {
struct _GstTtmlRenderRenderedText {
GstTtmlRenderRenderedImage *text_image;
/* In order to get the positions of characters within a paragraph rendered by
* pango we need to retain a reference to the PangoLayout object that was
* used to render that paragraph. */
PangoLayout *layout;
/* The coordinates in @layout will be offset horizontally with respect to the
* position of those characters in @text_image. Store that offset here so
* that the information in @layout can be used to locate the position and
@ -107,6 +102,7 @@ struct _GstTtmlRender {
gboolean need_render;
PangoLayout *layout;
GList * compositions;
};