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New Text source

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Initial implementation of Text Source, displaying free text or subtitle file. support for Pango font description and formatting tags via gstreamer textoverlay plugin. Saving and loading in XML, GUI for creation (in patterns) and for editing.
This commit is contained in:
Bruno Herbelin
2023-11-12 01:15:54 +01:00
parent f497da7967
commit d39064b209
28 changed files with 1141 additions and 19 deletions
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69
src/SessionCreator.cpp
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@@ -37,6 +37,7 @@
#include "NetworkSource.h"
#include "SrtReceiverSource.h"
#include "MultiFileSource.h"
#include "TextSource.h"
#include "RenderSource.h"
#include "Session.h"
#include "ImageShader.h"
@@ -448,6 +449,9 @@ void SessionLoader::load(XMLElement *sessionNode)
else if ( std::string(pType) == "SrtReceiverSource") {
load_source = new SrtReceiverSource(id_xml_);
}
else if ( std::string(pType) == "TextSource") {
load_source = new TextSource(id_xml_);
}
else if ( std::string(pType) == "CloneSource") {
cloneNodesToAdd.push_front(xmlCurrent_);
}
@@ -634,6 +638,9 @@ Source *SessionLoader::createSource(tinyxml2::XMLElement *sourceNode, Mode mode)
else if ( std::string(pType) == "SrtReceiverSource") {
load_source = new SrtReceiverSource(id__);
}
else if ( std::string(pType) == "TextSource") {
load_source = new TextSource(id__);
}
else if ( std::string(pType) == "CloneSource") {
// clone from given origin
XMLElement* originNode = xmlCurrent_->FirstChildElement("origin");
@@ -1222,10 +1229,70 @@ void SessionLoader::visit (PatternSource& s)
tinyxml2::XMLElementToGLM( res->FirstChildElement("ivec2"), resolution);
// change only if different pattern
if ( t != s.pattern()->type() )
if ( s.pattern() && t != s.pattern()->type() )
s.setPattern(t, resolution);
}
void SessionLoader::visit(TextSource &s)
{
bool value_changed = false;
std::string text;
glm::ivec2 resolution(800, 600);
XMLElement *_contents = xmlCurrent_->FirstChildElement("contents");
if ( s.contents() && _contents) {
// content can be an array of encoded text (to support strings with Pango styles <i>, <b>, etc.)
unsigned int len = 0;
const XMLElement *array = _contents->FirstChildElement("array");
if (array) {
array->QueryUnsignedAttribute("len", &len);
// ok, we got a size of data to load
if (len > 0) {
GString *data = g_string_new_len("", len);
if (XMLElementDecodeArray(array, data->str, data->len)) {
text = std::string(data->str);
}
g_string_free(data, FALSE);
}
}
// content can also just be raw text
else {
const char *data = _contents->GetText();
if (data)
text = std::string(data);
}
value_changed |= s.contents()->text().compare(text) != 0;
// attributes of content
const char *font;
if (_contents->QueryStringAttribute("font-desc", &font) == XML_SUCCESS && font) {
if (s.contents()->fontDescriptor().compare(font) != 0) {
s.contents()->setFontDescriptor(font);
}
}
uint alignment = s.contents()->halignment();
_contents->QueryUnsignedAttribute("halignment", &alignment);
if (s.contents()->halignment() != alignment)
s.contents()->setHalignment(alignment);
alignment = s.contents()->valignment();
_contents->QueryUnsignedAttribute("valignment", &alignment);
if (s.contents()->valignment() != alignment)
s.contents()->setValignment(alignment);
}
XMLElement* res = xmlCurrent_->FirstChildElement("resolution");
if (res) {
tinyxml2::XMLElementToGLM( res->FirstChildElement("ivec2"), resolution);
value_changed |= resolution.x != (int) s.stream()->width() || resolution.y != (int) s.stream()->height();
}
// change only if different
if ( s.contents() && ( value_changed || s.contents()->text().empty() ) ) {
s.setContents( text, resolution );
}
}
void SessionLoader::visit (DeviceSource& s)
{
std::string devname = std::string ( xmlCurrent_->Attribute("device") );