#include <fontconfig/fontconfig.h>
#include <cairomm/cairomm.h>
#include <pangomm.h>
+#ifndef DCPOMATIC_HAVE_SHOW_IN_CAIRO_CONTEXT
+#include <pango/pangocairo.h>
+#endif
#include <boost/foreach.hpp>
#include <iostream>
static list<pair<FontFiles, string> > fc_config_fonts;
string
-marked_up (list<SubtitleString> subtitles, int target_height)
+marked_up (list<SubtitleString> subtitles, int target_height, float fade_factor)
{
string out;
out += "underline=\"single\" ";
}
out += "size=\"" + dcp::raw_convert<string>(i.size_in_pixels(target_height) * 72 * 1024 / 96) + "\" ";
+ /* Between 1-65535 inclusive, apparently... */
+ out += "alpha=\"" + dcp::raw_convert<string>(int(floor(fade_factor * 65534)) + 1) + "\" ";
out += "color=\"#" + i.colour().to_rgb_string() + "\">";
out += i.text ();
out += "</span>";
return out;
}
+static void
+set_source_rgba (Cairo::RefPtr<Cairo::Context> context, dcp::Colour colour, float fade_factor)
+{
+ context->set_source_rgba (float(colour.r) / 255, float(colour.g) / 255, float(colour.b) / 255, fade_factor);
+}
+
/** @param subtitles A list of subtitles that are all on the same line,
* at the same time and with the same fade in/out.
*/
static PositionImage
-render_line (list<SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target, DCPTime time)
+render_line (list<SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target, DCPTime time, int frame_rate)
{
/* XXX: this method can only handle italic / bold changes mid-line,
nothing else yet.
/* ...and add a bit more for luck */
height += target.height / 11;
- shared_ptr<Image> image (new Image (AV_PIX_FMT_RGBA, dcp::Size (target.width, height), false));
+ /* FFmpeg BGRA means first byte blue, second byte green, third byte red, fourth byte alpha */
+ shared_ptr<Image> image (new Image (AV_PIX_FMT_BGRA, dcp::Size (target.width, height), false));
image->make_black ();
#ifdef DCPOMATIC_HAVE_FORMAT_STRIDE_FOR_WIDTH
Cairo::FORMAT_ARGB32,
image->size().width,
image->size().height,
+ /* Cairo ARGB32 means first byte blue, second byte green, third byte red, fourth byte alpha */
Cairo::ImageSurface::format_stride_for_width (Cairo::FORMAT_ARGB32, image->size().width)
);
#else
context->set_line_width (1);
- /* Render the subtitle at the top left-hand corner of image */
-
- Pango::FontDescription font (font_name);
- layout->set_font_description (font);
- layout->set_markup (marked_up (subtitles, target.height));
-
/* Compute fade factor */
float fade_factor = 1;
- DCPTime const fade_in_start = DCPTime::from_seconds (subtitles.front().in().as_seconds ());
+ /* Round the fade start/end to the nearest frame start. Otherwise if a subtitle starts just after
+ the start of a frame it will be faded out.
+ */
+ DCPTime const fade_in_start = DCPTime::from_seconds(subtitles.front().in().as_seconds()).round(frame_rate);
DCPTime const fade_in_end = fade_in_start + DCPTime::from_seconds (subtitles.front().fade_up_time().as_seconds ());
- DCPTime const fade_out_end = DCPTime::from_seconds (subtitles.front().out().as_seconds ());
+ DCPTime const fade_out_end = DCPTime::from_seconds (subtitles.front().out().as_seconds()).round(frame_rate);
DCPTime const fade_out_start = fade_out_end - DCPTime::from_seconds (subtitles.front().fade_down_time().as_seconds ());
+
if (fade_in_start <= time && time <= fade_in_end && fade_in_start != fade_in_end) {
- fade_factor = DCPTime(time - fade_in_start).seconds() / DCPTime(fade_in_end - fade_in_start).seconds();
- } else if (fade_out_start <= time && time <= fade_out_end && fade_out_start != fade_out_end) {
- fade_factor = 1 - DCPTime(time - fade_out_start).seconds() / DCPTime(fade_out_end - fade_out_start).seconds();
- } else if (time < fade_in_start || time > fade_out_end) {
+ fade_factor *= DCPTime(time - fade_in_start).seconds() / DCPTime(fade_in_end - fade_in_start).seconds();
+ }
+ if (fade_out_start <= time && time <= fade_out_end && fade_out_start != fade_out_end) {
+ fade_factor *= 1 - DCPTime(time - fade_out_start).seconds() / DCPTime(fade_out_end - fade_out_start).seconds();
+ }
+ if (time < fade_in_start || time > fade_out_end) {
fade_factor = 0;
}
+ /* Render the subtitle at the top left-hand corner of image */
+
+ Pango::FontDescription font (font_name);
+ layout->set_font_description (font);
+ layout->set_markup (marked_up (subtitles, target.height, fade_factor));
+
context->scale (xscale, yscale);
layout->update_from_cairo_context (context);
side of the first character's border is not cut off.
*/
int const x_offset = subtitles.front().effect() == dcp::BORDER ? (target.width / 600.0) : 0;
+ /* Move down a bit so that accents on capital letters can be seen */
+ int const y_offset = target.height / 100.0;
if (subtitles.front().effect() == dcp::SHADOW) {
/* Drop-shadow effect */
- dcp::Colour const ec = subtitles.front().effect_colour ();
- context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor);
- context->move_to (x_offset + 4, 4);
+ set_source_rgba (context, subtitles.front().effect_colour(), fade_factor);
+ context->move_to (x_offset + 4, y_offset + 4);
layout->add_to_cairo_context (context);
context->fill ();
}
if (subtitles.front().effect() == dcp::BORDER) {
/* Border effect; stroke the subtitle with a large (arbitrarily chosen) line width */
- dcp::Colour ec = subtitles.front().effect_colour ();
- context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor);
+ set_source_rgba (context, subtitles.front().effect_colour(), fade_factor);
context->set_line_width (subtitles.front().outline_width * target.width / 2048.0);
context->set_line_join (Cairo::LINE_JOIN_ROUND);
- context->move_to (x_offset, 0);
+ context->move_to (x_offset, y_offset);
layout->add_to_cairo_context (context);
context->stroke ();
}
/* The actual subtitle */
context->set_line_width (0);
- context->move_to (x_offset, 0);
+ context->move_to (x_offset, y_offset);
+#ifdef DCPOMATIC_HAVE_SHOW_IN_CAIRO_CONTEXT
layout->show_in_cairo_context (context);
+#else
+ pango_cairo_show_layout (context->cobj(), layout->gobj());
+#endif
int layout_width;
int layout_height;
return PositionImage (image, Position<int> (max (0, x), max (0, y)));
}
-/** @param time Time of the frame that these subtitles are going on */
+/** @param time Time of the frame that these subtitles are going on.
+ * @param frame_rate DCP frame rate.
+ */
list<PositionImage>
-render_subtitles (list<SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target, DCPTime time)
+render_subtitles (list<SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target, DCPTime time, int frame_rate)
{
list<SubtitleString> pending;
list<PositionImage> images;
BOOST_FOREACH (SubtitleString const & i, subtitles) {
if (!pending.empty() && fabs (i.v_position() - pending.back().v_position()) > 1e-4) {
- images.push_back (render_line (pending, fonts, target, time));
+ images.push_back (render_line (pending, fonts, target, time, frame_rate));
pending.clear ();
}
pending.push_back (i);
}
if (!pending.empty ()) {
- images.push_back (render_line (pending, fonts, target, time));
+ images.push_back (render_line (pending, fonts, target, time, frame_rate));
}
return images;
projects / dcpomatic.git / blobdiff