#include "font_config.h"
#include "image.h"
#include "render_text.h"
-#include "types.h"
#include "util.h"
#include <dcp/raw_convert.h>
#include <dcp/warnings.h>
using std::pair;
using std::shared_ptr;
using std::string;
+using boost::optional;
using namespace dcpomatic;
* for the actual render.
*/
static Glib::RefPtr<Pango::Layout>
-create_layout()
+create_layout(string font_name, string markup)
{
auto c_font_map = pango_cairo_font_map_new ();
DCPOMATIC_ASSERT (c_font_map);
auto c_context = pango_font_map_create_context (c_font_map);
DCPOMATIC_ASSERT (c_context);
auto context = Glib::wrap (c_context);
- return Pango::Layout::create (context);
-}
-
+ auto layout = Pango::Layout::create(context);
-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);
+
+ return layout;
}
span += " " + extra_attribute;
}
span += ">";
+
+ boost::algorithm::replace_all(text, "&", "&");
+ boost::algorithm::replace_all(text, "<", "<");
+ boost::algorithm::replace_all(text, ">", ">");
+
span += text;
span += "</span>";
return span;
* be written with letter_spacing either side. This means that to get a horizontal space x we
* need to write a " " with letter spacing (x - s) / 2, where s is the width of the " ".
*/
- auto layout = create_layout();
- setup_layout(layout, font_name, make_span(i, " ", {}));
+ auto layout = create_layout(font_name, make_span(i, " ", {}));
int space_width;
int dummy;
layout->get_pixel_size(space_width, dummy);
}
-static string
-setup_font (StringText const& subtitle)
-{
- auto font_file = default_font_file ();
-
- if (subtitle.font && subtitle.font->file()) {
- font_file = *subtitle.font->file();
- }
-
- return FontConfig::instance()->make_font_available(font_file);
-}
-
-
static float
calculate_fade_factor (StringText const& first, DCPTime time, int frame_rate)
{
static int
-x_position (StringText const& first, int target_width, int layout_width)
+x_position(dcp::HAlign align, float position, int target_width, int layout_width)
{
int x = 0;
- switch (first.h_align()) {
+ switch (align) {
case dcp::HAlign::LEFT:
/* h_position is distance between left of frame and left of subtitle */
- x = first.h_position() * target_width;
+ x = position * target_width;
break;
case dcp::HAlign::CENTER:
/* h_position is distance between centre of frame and centre of subtitle */
- x = (0.5 + first.h_position()) * target_width - layout_width / 2;
+ x = (0.5 + position) * target_width - layout_width / 2;
break;
case dcp::HAlign::RIGHT:
/* h_position is distance between right of frame and right of subtitle */
- x = (1.0 - first.h_position()) * target_width - layout_width;
+ x = (1.0 - position) * target_width - layout_width;
break;
}
}
+/** @param align_standard Standard with which to interpret this subtitle's position.
+ * @param align alignment.
+ * @param position position (between 0 and 1)
+ * @param target_height Height of the target screen (in pixels).
+ * @param baseline_to_bottom Distance from text baseline to the bottom of the bounding box (in pixels).
+ * @param layout_height Height of the subtitle bounding box (in pixels).
+ * @return y position of the top of the subtitle bounding box (in pixels) from the top of the screen.
+ */
static int
-y_position (StringText const& first, int target_height, int layout_height)
+y_position(dcp::SubtitleStandard standard, dcp::VAlign align, float position, int target_height, int baseline_to_bottom, int layout_height)
{
int y = 0;
- switch (first.v_align()) {
- case dcp::VAlign::TOP:
- /* SMPTE says that v_position is the distance between top
- of frame and top of subtitle, but this doesn't always seem to be
- the case in practice; Gunnar Ásgeirsson's Dolby server appears
- to put VAlign::TOP subs with v_position as the distance between top
- of frame and bottom of subtitle.
- */
- y = first.v_position() * target_height - layout_height;
- break;
- case dcp::VAlign::CENTER:
- /* v_position is distance between centre of frame and centre of subtitle */
- y = (0.5 + first.v_position()) * target_height - layout_height / 2;
- break;
- case dcp::VAlign::BOTTOM:
- /* v_position is distance between bottom of frame and bottom of subtitle */
- y = (1.0 - first.v_position()) * target_height - layout_height;
+ switch (standard) {
+ case dcp::SubtitleStandard::INTEROP:
+ case dcp::SubtitleStandard::SMPTE_2014:
+ switch (align) {
+ case dcp::VAlign::TOP:
+ /* position is distance from top of frame to subtitle baseline */
+ y = position * target_height - (layout_height - baseline_to_bottom);
+ break;
+ case dcp::VAlign::CENTER:
+ /* position is distance from centre of frame to subtitle baseline */
+ y = (0.5 + position) * target_height - (layout_height - baseline_to_bottom);
+ break;
+ case dcp::VAlign::BOTTOM:
+ /* position is distance from bottom of frame to subtitle baseline */
+ y = (1.0 - position) * target_height - (layout_height - baseline_to_bottom);
+ break;
+ }
break;
+ case dcp::SubtitleStandard::SMPTE_2007:
+ case dcp::SubtitleStandard::SMPTE_2010:
+ switch (align) {
+ case dcp::VAlign::TOP:
+ /* v_position is distance from top of frame to top of subtitle */
+ y = position * target_height;
+ break;
+ case dcp::VAlign::CENTER:
+ /* v_position is distance from centre of frame to centre of subtitle */
+ y = (0.5 + position) * target_height - layout_height / 2;
+ break;
+ case dcp::VAlign::BOTTOM:
+ /* v_position is distance from bottom of frame to bottom of subtitle */
+ y = (1.0 - position) * target_height - layout_height;
+ break;
+ }
}
return y;
}
+struct Layout
+{
+ Position<int> position;
+ dcp::Size size;
+ Glib::RefPtr<Pango::Layout> pango;
+};
+
+
+/** @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 Layout
+setup_layout(list<StringText> subtitles, dcp::Size target, DCPTime time, int frame_rate)
+{
+ DCPOMATIC_ASSERT(!subtitles.empty());
+ auto const& first = subtitles.front();
+
+ auto const font_name = FontConfig::instance()->make_font_available(first.font);
+ auto const fade_factor = calculate_fade_factor(first, time, frame_rate);
+ auto const markup = marked_up(subtitles, target.height, fade_factor, font_name);
+ auto layout = create_layout(font_name, markup);
+ auto ink = layout->get_ink_extents();
+ return { { ink.get_x() / Pango::SCALE, ink.get_y() / Pango::SCALE }, { ink.get_width() / Pango::SCALE, ink.get_height() / Pango::SCALE }, layout };
+}
+
+
/** @param subtitles A list of subtitles that are all on the same line,
* at the same time and with the same fade in/out.
*/
nothing else yet.
*/
- DCPOMATIC_ASSERT (!subtitles.empty ());
- auto const& first = subtitles.front ();
+ DCPOMATIC_ASSERT(!subtitles.empty ());
+ auto const& first = subtitles.front();
+ auto const fade_factor = calculate_fade_factor(first, time, frame_rate);
- auto const font_name = setup_font (first);
- auto const fade_factor = calculate_fade_factor (first, time, frame_rate);
- auto const markup = marked_up (subtitles, target.height, fade_factor, font_name);
- auto layout = create_layout ();
- setup_layout (layout, font_name, markup);
- dcp::Size size;
- layout->get_pixel_size (size.width, size.height);
+ auto layout = setup_layout(subtitles, target, time, frame_rate);
/* Calculate x and y scale factors. These are only used to stretch
the font away from its normal aspect ratio.
}
auto const border_width = first.effect() == dcp::Effect::BORDER ? (first.outline_width * target.width / 2048.0) : 0;
- size.width += 2 * ceil (border_width);
- size.height += 2 * ceil (border_width);
+ layout.size.width += 2 * ceil (border_width);
+ layout.size.height += 2 * ceil (border_width);
- size.width *= x_scale;
- size.height *= y_scale;
+ layout.size.width *= x_scale;
+ layout.size.height *= y_scale;
/* 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;
-
- size.width += x_offset;
- size.height += y_offset;
+ int const x_offset = -layout.position.x + ceil(border_width);
+ int const y_offset = -layout.position.y + ceil(border_width);
- auto image = create_image (size);
+ auto image = create_image(layout.size);
auto surface = create_surface (image);
auto context = Cairo::Context::create (surface);
context->set_line_width (1);
context->scale (x_scale, y_scale);
- layout->update_from_cairo_context (context);
+ layout.pango->update_from_cairo_context(context);
if (first.effect() == dcp::Effect::SHADOW) {
/* Drop-shadow effect */
set_source_rgba (context, first.effect_colour(), fade_factor);
context->move_to (x_offset + 4, y_offset + 4);
- layout->add_to_cairo_context (context);
+ layout.pango->add_to_cairo_context(context);
context->fill ();
}
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);
+ layout.pango->add_to_cairo_context (context);
context->stroke ();
}
set_source_rgba (context, first.colour(), fade_factor);
context->move_to (x_offset, y_offset);
- layout->add_to_cairo_context (context);
+ layout.pango->add_to_cairo_context (context);
context->fill ();
context->set_line_width (0.5);
context->move_to (x_offset, y_offset);
- layout->add_to_cairo_context (context);
+ layout.pango->add_to_cairo_context (context);
context->stroke ();
- int const x = x_position (first, target.width, size.width);
- int const y = y_position (first, target.height, size.height);
+ int const x = x_position(first.h_align(), first.h_position(), target.width, layout.size.width);
+ int const y = y_position(first.valign_standard, first.v_align(), first.v_position(), target.height, layout.position.y, layout.size.height);
return PositionImage (image, Position<int>(max (0, x), max(0, y)));
}
}
if (!pending.empty()) {
- images.push_back(render_line(pending, target, time, frame_rate));
+ images.push_back(render_line(pending, target, time, frame_rate));
}
return images;
}
+
+
+list<dcpomatic::Rect<int>>
+bounding_box(list<StringText> subtitles, dcp::Size target, optional<dcp::SubtitleStandard> override_standard)
+{
+ list<StringText> pending;
+ list<dcpomatic::Rect<int>> rects;
+
+ auto use_pending = [&pending, &rects, target, override_standard]() {
+ auto const& subtitle = pending.front();
+ auto standard = override_standard.get_value_or(subtitle.valign_standard);
+ /* We can provide dummy values for time and frame rate here as they are only used to calculate fades */
+ auto layout = setup_layout(pending, target, DCPTime(), 24);
+ int const x = x_position(subtitle.h_align(), subtitle.h_position(), target.width, layout.size.width);
+ int const y = y_position(standard, subtitle.v_align(), subtitle.v_position(), target.height, layout.position.y, layout.size.height);
+ rects.push_back({Position<int>(x, y), layout.size.width, layout.size.height});
+ };
+
+ for (auto const& i: subtitles) {
+ if (!pending.empty() && (i.v_align() != pending.back().v_align() || fabs(i.v_position() - pending.back().v_position()) > 1e-4)) {
+ use_pending();
+ pending.clear();
+ }
+ pending.push_back(i);
+ }
+
+ if (!pending.empty()) {
+ use_pending();
+ }
+
+ return rects;
+}
+
+
+float
+FontMetrics::height(StringText const& subtitle)
+{
+ return get(subtitle)->second.second;
+}
+
+
+float
+FontMetrics::baseline_to_bottom(StringText const& subtitle)
+{
+ return get(subtitle)->second.first;
+}
+
+
+FontMetrics::Cache::iterator
+FontMetrics::get(StringText const& subtitle)
+{
+ auto id = Identifier(subtitle);
+
+ auto iter = _cache.find(id);
+ if (iter != _cache.end()) {
+ return iter;
+ }
+
+ auto const font_name = FontConfig::instance()->make_font_available(subtitle.font);
+ auto copy = subtitle;
+ copy.set_text("Qypjg");
+ auto layout = create_layout(font_name, marked_up({copy}, _target_height, 1, font_name));
+ auto ink = layout->get_ink_extents();
+ auto const scale = float(_target_height * Pango::SCALE);
+ return _cache.insert({id, { ink.get_y() / scale, ink.get_height() / scale}}).first;
+}
+
+
+FontMetrics::Identifier::Identifier(StringText const& subtitle)
+ : font(subtitle.font)
+ , size(subtitle.size())
+ , aspect_adjust(subtitle.aspect_adjust())
+{
+
+}
+
+
+bool
+FontMetrics::Identifier::operator<(FontMetrics::Identifier const& other) const
+{
+ if (font != other.font) {
+ return font < other.font;
+ }
+
+ if (size != other.size) {
+ return size < other.size;
+ }
+
+ return aspect_adjust < other.aspect_adjust;
+}
+
projects / dcpomatic.git / blobdiff