#include "cross.h"
#include "font.h"
#include "dcpomatic_assert.h"
+#include "warnings.h"
+#include "util.h"
#include <dcp/raw_convert.h>
#include <fontconfig/fontconfig.h>
#include <cairomm/cairomm.h>
+DCPOMATIC_DISABLE_WARNINGS
#include <pangomm.h>
+DCPOMATIC_ENABLE_WARNINGS
+#include <pango/pangocairo.h>
#ifndef DCPOMATIC_HAVE_SHOW_IN_CAIRO_CONTEXT
#include <pango/pangocairo.h>
#endif
static shared_ptr<Image>
-create_image (int width, int height)
+create_image (dcp::Size size)
{
/* 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 (width, height), false));
+ shared_ptr<Image> image (new Image(AV_PIX_FMT_BGRA, size, false));
image->make_black ();
return image;
}
fc_config = FcInitLoadConfig ();
}
- optional<boost::filesystem::path> font_file;
-
- try {
- font_file = shared_path () / "LiberationSans-Regular.ttf";
- } catch (boost::filesystem::filesystem_error& e) {
-
- }
-
- /* Hack: try the debian/ubuntu locations if getting the shared path failed */
-
- if (!font_file || !boost::filesystem::exists(*font_file)) {
- font_file = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
- }
+ optional<boost::filesystem::path> font_file = default_font_file ();
BOOST_FOREACH (shared_ptr<Font> i, fonts) {
if (i->id() == subtitle.font() && i->file()) {
}
+static void
+setup_layout (Glib::RefPtr<Pango::Layout> layout, string font_name, string markup)
+{
+ layout->set_alignment (Pango::ALIGN_LEFT);
+ Pango::FontDescription font (font_name);
+ layout->set_font_description (font);
+ layout->set_markup (markup);
+}
+
+/** Create a Pango layout using a dummy context which we can use to calculate the size
+ * of the text we will render. Then we can transfer the layout over to the real context
+ * for the actual render.
+ */
+static Glib::RefPtr<Pango::Layout>
+create_layout()
+{
+ PangoFontMap* c_font_map = pango_cairo_font_map_new ();
+ DCPOMATIC_ASSERT (c_font_map);
+ Glib::RefPtr<Pango::FontMap> font_map = Glib::wrap (c_font_map);
+ PangoContext* c_context = pango_font_map_create_context (c_font_map);
+ DCPOMATIC_ASSERT (c_context);
+ Glib::RefPtr<Pango::Context> context = Glib::wrap (c_context);
+ return Pango::Layout::create (context);
+}
+
+
/** @param subtitles A list of subtitles that are all on the same line,
* at the same time and with the same fade in/out.
*/
*/
DCPOMATIC_ASSERT (!subtitles.empty ());
-
StringText const& first = subtitles.front ();
+ string const font_name = setup_font (first, fonts);
+ float const fade_factor = calculate_fade_factor (first, time, frame_rate);
+ string const markup = marked_up (subtitles, target.height, fade_factor);
+ Glib::RefPtr<Pango::Layout> layout = create_layout ();
+ setup_layout (layout, font_name, markup);
+ dcp::Size size;
+ layout->get_pixel_size (size.width, size.height);
+
/* 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;
+ float x_scale = 1;
+ float y_scale = 1;
if (fabs (first.aspect_adjust() - 1.0) > dcp::ASPECT_ADJUST_EPSILON) {
if (first.aspect_adjust() < 1) {
- xscale = max (0.25f, first.aspect_adjust ());
- yscale = 1;
+ x_scale = max (0.25f, first.aspect_adjust ());
+ y_scale = 1;
} else {
- xscale = 1;
- yscale = 1 / min (4.0f, first.aspect_adjust ());
+ x_scale = 1;
+ y_scale = 1 / min (4.0f, first.aspect_adjust ());
}
}
- /* Make an empty bitmap as wide as target and at
- least tall enough for this subtitle.
- */
+ float const border_width = first.effect() == dcp::BORDER ? (first.outline_width * target.width / 2048.0) : 0;
+ size.width += 2 * ceil (border_width);
+ size.height += 2 * ceil (border_width);
- int largest = 0;
- BOOST_FOREACH (dcp::SubtitleString const & i, subtitles) {
- largest = max (largest, i.size());
- }
- /* Basic guess on height... */
- int height = largest * target.height / (11 * 72);
- /* ...scaled... */
- height *= yscale;
- /* ...and add a bit more for luck */
- height += target.height / 11;
-
- shared_ptr<Image> image = create_image (target.width, height);
- Cairo::RefPtr<Cairo::Surface> surface = create_surface (image);
- Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (surface);
- string const font_name = setup_font (first, fonts);
- Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
-
- layout->set_alignment (Pango::ALIGN_LEFT);
-
- context->set_line_width (1);
+ size.width *= x_scale;
+ size.height *= y_scale;
- float const fade_factor = calculate_fade_factor (first, time, frame_rate);
+ /* Shuffle the subtitle over by the border width (if we have any) so it's not cut off */
+ int const x_offset = ceil (border_width);
+ /* Move down a bit so that accents on capital letters can be seen */
+ int const y_offset = target.height / 100.0;
- /* Render the subtitle at the top left-hand corner of image */
+ size.width += x_offset;
+ size.height += y_offset;
- Pango::FontDescription font (font_name);
- layout->set_font_description (font);
- layout->set_markup (marked_up (subtitles, target.height, fade_factor));
+ shared_ptr<Image> image = create_image (size);
+ Cairo::RefPtr<Cairo::Surface> surface = create_surface (image);
+ Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (surface);
- context->scale (xscale, yscale);
+ context->set_line_width (1);
+ context->scale (x_scale, y_scale);
layout->update_from_cairo_context (context);
- /* Shuffle the subtitle over very slightly if it has a border so that the left-hand
- side of the first character's border is not cut off.
- */
- int const x_offset = first.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 (first.effect() == dcp::SHADOW) {
/* Drop-shadow effect */
set_source_rgba (context, first.effect_colour(), fade_factor);
}
if (first.effect() == dcp::BORDER) {
- /* Border effect; stroke the subtitle with a large (arbitrarily chosen) line width */
+ /* Border effect */
set_source_rgba (context, first.effect_colour(), fade_factor);
- context->set_line_width (first.outline_width * target.width / 2048.0);
+ context->set_line_width (border_width);
context->set_line_join (Cairo::LINE_JOIN_ROUND);
context->move_to (x_offset, y_offset);
layout->add_to_cairo_context (context);
/* The actual subtitle */
- context->set_line_width (0);
+ set_source_rgba (context, first.colour(), fade_factor);
+
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
+ layout->add_to_cairo_context (context);
+ context->fill ();
- int layout_width;
- int layout_height;
- layout->get_pixel_size (layout_width, layout_height);
- layout_width *= xscale;
- layout_height *= yscale;
+ context->set_line_width (0.5);
+ context->move_to (x_offset, y_offset);
+ layout->add_to_cairo_context (context);
+ context->stroke ();
- int const x = x_position (first, target.width, layout_width);
- int const y = y_position (first, target.height, layout_height);
- return PositionImage (image, Position<int> (max (0, x), max (0, y)));
+ int const x = x_position (first, target.width, size.width);
+ int const y = y_position (first, target.height, size.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 target Size of the container that this subtitle will end up in.
* @param frame_rate DCP frame rate.
*/
list<PositionImage>
projects / dcpomatic.git / blobdiff