/*
- Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
*/
-#include <cairomm/cairomm.h>
-#include <pangomm.h>
#include "render_subtitles.h"
#include "types.h"
#include "image.h"
+#include "cross.h"
+#include "font.h"
+#include <cairomm/cairomm.h>
+#include <pangomm.h>
+#include <boost/foreach.hpp>
+#include <iostream>
using std::list;
using std::cout;
using std::min;
using std::max;
using std::pair;
+using std::cerr;
+using std::make_pair;
using boost::shared_ptr;
using boost::optional;
-static int
-calculate_position (dcp::VAlign v_align, double v_position, int target_height, int offset)
-{
- switch (v_align) {
- case dcp::TOP:
- return (v_position / 100) * target_height - offset;
- case dcp::CENTER:
- return (0.5 + v_position / 100) * target_height - offset;
- case dcp::BOTTOM:
- return (1.0 - v_position / 100) * target_height - offset;
- }
+static FcConfig* fc_config = 0;
+static list<pair<boost::filesystem::path, string> > fc_config_fonts;
- return 0;
-}
-
-PositionImage
-render_subtitles (list<dcp::SubtitleString> subtitles, dcp::Size target)
+static PositionImage
+render_subtitle (dcp::SubtitleString const & subtitle, list<shared_ptr<Font> > fonts, dcp::Size target)
{
- if (subtitles.empty ()) {
- return PositionImage ();
+ /* Calculate x and y scale factors. These are only used to stretch
+ the font away from its normal aspect ratio.
+ */
+ float xscale = 1;
+ float yscale = 1;
+ if (fabs (subtitle.aspect_adjust() - 1.0) > dcp::ASPECT_ADJUST_EPSILON) {
+ if (subtitle.aspect_adjust() < 1) {
+ xscale = max (0.25f, subtitle.aspect_adjust ());
+ yscale = 1;
+ } else {
+ xscale = 1;
+ yscale = 1 / min (4.0f, subtitle.aspect_adjust ());
+ }
}
- /* Estimate height that the subtitle image needs to be */
- optional<int> top;
- optional<int> bottom;
- for (list<dcp::SubtitleString>::const_iterator i = subtitles.begin(); i != subtitles.end(); ++i) {
- int const b = calculate_position (i->v_align(), i->v_position(), target.height, 0);
- int const t = b - i->size() * target.height / (11 * 72);
-
- top = min (top.get_value_or (t), t);
- bottom = max (bottom.get_value_or (b), b);
- }
+ /* Make an empty bitmap as wide as target and at
+ least tall enough for this subtitle.
+ */
- top = top.get() - 32;
- bottom = bottom.get() + 32;
+ /* Basic guess on height... */
+ int height = subtitle.size() * target.height / (11 * 72);
+ /* ...scaled... */
+ height *= yscale;
+ /* ...and add a bit more for luck */
+ height += target.height / 11;
- shared_ptr<Image> image (new Image (PIX_FMT_RGBA, dcp::Size (target.width, bottom.get() - top.get ()), false));
+ shared_ptr<Image> image (new Image (PIX_FMT_RGBA, dcp::Size (target.width, height), false));
image->make_black ();
Cairo::RefPtr<Cairo::ImageSurface> surface = Cairo::ImageSurface::create (
image->size().height,
Cairo::ImageSurface::format_stride_for_width (Cairo::FORMAT_ARGB32, image->size().width)
);
-
+
Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (surface);
- Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
- layout->set_width (image->size().width * PANGO_SCALE);
- layout->set_alignment (Pango::ALIGN_CENTER);
+ if (!fc_config) {
+ fc_config = FcConfigCreate ();
+ }
- context->set_line_width (1);
+ boost::filesystem::path font_file;
+ try {
+ font_file = shared_path () / "LiberationSans-Regular.ttf";
+ } catch (boost::filesystem::filesystem_error& e) {
+ /* Hack: try the debian/ubuntu location if getting the shared path failed */
+ font_file = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
+ }
- for (list<dcp::SubtitleString>::const_iterator i = subtitles.begin(); i != subtitles.end(); ++i) {
- string f = i->font ();
- if (f.empty ()) {
- f = "Arial";
+ BOOST_FOREACH (shared_ptr<Font> i, fonts) {
+ if (i->id() == subtitle.font() && i->file ()) {
+ font_file = i->file().get ();
}
- Pango::FontDescription font (f);
- font.set_absolute_size (i->size_in_pixels (target.height) * PANGO_SCALE);
- if (i->italic ()) {
- font.set_style (Pango::STYLE_ITALIC);
- }
- layout->set_font_description (font);
- layout->set_text (i->text ());
-
- /* Compute fade factor */
- /* XXX */
- float fade_factor = 1;
-#if 0
- dcp::Time now (time * 1000 / (4 * TIME_HZ));
- dcp::Time end_fade_up = i->in() + i->fade_up_time ();
- dcp::Time start_fade_down = i->out() - i->fade_down_time ();
- if (now < end_fade_up) {
- fade_factor = (now - i->in()) / i->fade_up_time();
- } else if (now > start_fade_down) {
- fade_factor = 1.0 - ((now - start_fade_down) / i->fade_down_time ());
- }
-#endif
-
- layout->update_from_cairo_context (context);
-
- /* Work out position */
-
- int const x = 0;
- int const y = calculate_position (i->v_align (), i->v_position (), target.height, (layout->get_baseline() / PANGO_SCALE) + top.get ());
-
- if (i->effect() == dcp::SHADOW) {
- /* Drop-shadow effect */
- dcp::Color const ec = i->effect_color ();
- context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor);
- context->move_to (x + 4, y + 4);
- layout->add_to_cairo_context (context);
- context->fill ();
+ }
+
+ list<pair<boost::filesystem::path, string> >::const_iterator existing = fc_config_fonts.begin ();
+ while (existing != fc_config_fonts.end() && existing->first != font_file) {
+ ++existing;
+ }
+
+ string font_name;
+ if (existing != fc_config_fonts.end ()) {
+ font_name = existing->second;
+ } else {
+ /* Make this font available to DCP-o-matic */
+ FcConfigAppFontAddFile (fc_config, reinterpret_cast<FcChar8 const *> (font_file.string().c_str ()));
+
+ FcPattern* pattern = FcPatternBuild (0, FC_FILE, FcTypeString, font_file.string().c_str(), static_cast<char *> (0));
+ FcObjectSet* object_set = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, static_cast<char *> (0));
+ FcFontSet* font_set = FcFontList (fc_config, pattern, object_set);
+ if (font_set) {
+ for (int i = 0; i < font_set->nfont; ++i) {
+ FcPattern* font = font_set->fonts[i];
+ FcChar8* file;
+ FcChar8* family;
+ FcChar8* style;
+ if (
+ FcPatternGetString (font, FC_FILE, 0, &file) == FcResultMatch &&
+ FcPatternGetString (font, FC_FAMILY, 0, &family) == FcResultMatch &&
+ FcPatternGetString (font, FC_STYLE, 0, &style) == FcResultMatch
+ ) {
+ font_name = reinterpret_cast<char const *> (family);
+ }
+ }
+
+ FcFontSetDestroy (font_set);
}
- /* The actual subtitle */
- context->move_to (x, y);
- dcp::Color const c = i->color ();
- context->set_source_rgba (float(c.r) / 255, float(c.g) / 255, float(c.b) / 255, fade_factor);
+ FcObjectSetDestroy (object_set);
+ FcPatternDestroy (pattern);
+
+ fc_config_fonts.push_back (make_pair (font_file, font_name));
+ }
+
+ FcConfigSetCurrent (fc_config);
+
+ Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
+
+ layout->set_alignment (Pango::ALIGN_LEFT);
+
+ context->set_line_width (1);
+
+ /* Render the subtitle at the top left-hand corner of image */
+
+ Pango::FontDescription font (font_name);
+ font.set_absolute_size (subtitle.size_in_pixels (target.height) * PANGO_SCALE);
+ if (subtitle.italic ()) {
+ font.set_style (Pango::STYLE_ITALIC);
+ }
+ layout->set_font_description (font);
+ layout->set_text (subtitle.text ());
+
+ /* Compute fade factor */
+ /* XXX */
+ float fade_factor = 1;
+
+ layout->update_from_cairo_context (context);
+
+ context->scale (xscale, yscale);
+
+ if (subtitle.effect() == dcp::SHADOW) {
+ /* Drop-shadow effect */
+ dcp::Colour const ec = subtitle.effect_colour ();
+ context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor);
+ context->move_to (4, 4);
layout->add_to_cairo_context (context);
context->fill ();
+ }
- if (i->effect() == dcp::BORDER) {
- /* Border effect */
- context->move_to (x, y);
- dcp::Color ec = i->effect_color ();
- context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor);
- layout->add_to_cairo_context (context);
- context->stroke ();
- }
+ /* The actual subtitle */
+
+ dcp::Colour const c = subtitle.colour ();
+ context->set_source_rgba (float(c.r) / 255, float(c.g) / 255, float(c.b) / 255, fade_factor);
+ context->move_to (0, 0);
+ layout->add_to_cairo_context (context);
+ context->fill ();
+
+ if (subtitle.effect() == dcp::BORDER) {
+ /* Border effect */
+ dcp::Colour ec = subtitle.effect_colour ();
+ context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor);
+ context->move_to (0, 0);
+ layout->add_to_cairo_context (context);
+ context->stroke ();
+ }
+
+ int layout_width;
+ int layout_height;
+ layout->get_size (layout_width, layout_height);
+
+ int x = 0;
+ switch (subtitle.h_align ()) {
+ case dcp::HALIGN_LEFT:
+ /* h_position is distance between left of frame and left of subtitle */
+ x = subtitle.h_position() * target.width;
+ break;
+ case dcp::HALIGN_CENTER:
+ /* h_position is distance between centre of frame and centre of subtitle */
+ x = (0.5 + subtitle.h_position()) * target.width - layout_width / (PANGO_SCALE * 2);
+ break;
+ case dcp::HALIGN_RIGHT:
+ /* h_position is distance between right of frame and right of subtitle */
+ x = (1.0 - subtitle.h_position()) * target.width - layout_width / PANGO_SCALE;
+ break;
+ }
+
+ int y = 0;
+ switch (subtitle.v_align ()) {
+ case dcp::VALIGN_TOP:
+ /* v_position is distance between top of frame and top of subtitle */
+ y = subtitle.v_position() * target.height;
+ break;
+ case dcp::VALIGN_CENTER:
+ /* v_position is distance between centre of frame and centre of subtitle */
+ y = (0.5 + subtitle.v_position()) * target.height - layout_height / (PANGO_SCALE * 2);
+ break;
+ case dcp::VALIGN_BOTTOM:
+ /* v_position is distance between bottom of frame and bottom of subtitle */
+ y = (1.0 - subtitle.v_position()) * target.height - layout_height / PANGO_SCALE;
+ break;
}
- return PositionImage (image, Position<int> (0, top.get ()));
+ return PositionImage (image, Position<int> (x, y));
}
+list<PositionImage>
+render_subtitles (list<dcp::SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target)
+{
+ list<PositionImage> images;
+ BOOST_FOREACH (dcp::SubtitleString const & i, subtitles) {
+ images.push_back (render_subtitle (i, fonts, target));
+ }
+ return images;
+}
projects / dcpomatic.git / blobdiff