603 lines
19 KiB
C++
603 lines
19 KiB
C++
#include "StarTextPainter.hpp"
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#include "StarJsonExtra.hpp"
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#include <regex>
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namespace Star {
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namespace Text {
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static auto stripEscapeRegex = std::regex(strf("\\{:c}[^;]*{:c}", CmdEsc, EndEsc));
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String stripEscapeCodes(String const& s) {
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return std::regex_replace(s.utf8(), stripEscapeRegex, "");
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}
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inline bool isEscapeCode(char c) {
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return c == CmdEsc || c == StartEsc;
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}
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static std::string escapeChars = strf("{:c}{:c}", CmdEsc, StartEsc);
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typedef function<bool(StringView text)> TextCallback;
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typedef function<bool(StringView commands)> CommandsCallback;
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bool processText(StringView text, TextCallback textFunc, CommandsCallback commandsFunc = CommandsCallback(), bool includeCommandSides = false) {
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std::string_view escChars(escapeChars);
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std::string_view str = text.utf8();
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while (true) {
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size_t escape = str.find_first_of(escChars);
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if (escape != NPos) {
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escape = str.find_first_not_of(escChars, escape) - 1; // jump to the last ^
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size_t end = str.find_first_of(EndEsc, escape);
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if (end != NPos) {
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if (escape && !textFunc(str.substr(0, escape)))
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return false;
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if (commandsFunc) {
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StringView commands = includeCommandSides
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? str.substr(escape, end - escape + 1)
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: str.substr(escape + 1, end - escape - 1);
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if (!commands.empty() && !commandsFunc(commands))
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return false;
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}
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str = str.substr(end + 1);
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continue;
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}
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}
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if (!str.empty())
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return textFunc(str);
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return true;
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}
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}
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// The below two functions aren't used anymore, not bothering with StringView for them
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String preprocessEscapeCodes(String const& s) {
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bool escape = false;
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std::string result = s.utf8();
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size_t escapeStartIdx = 0;
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for (size_t i = 0; i < result.size(); i++) {
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auto& c = result[i];
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if (isEscapeCode(c)) {
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escape = true;
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escapeStartIdx = i;
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}
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if ((c <= SpecialCharLimit) && !(c == StartEsc))
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escape = false;
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if ((c == EndEsc) && escape)
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result[escapeStartIdx] = StartEsc;
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}
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return {result};
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}
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String extractCodes(String const& s) {
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bool escape = false;
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StringList result;
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String escapeCode;
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for (auto c : preprocessEscapeCodes(s)) {
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if (c == StartEsc)
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escape = true;
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if (c == EndEsc) {
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escape = false;
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for (auto command : escapeCode.split(','))
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result.append(command);
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escapeCode = "";
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}
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if (escape && (c != StartEsc))
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escapeCode.append(c);
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}
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if (!result.size())
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return "";
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return "^" + result.join(",") + ";";
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}
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}
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TextPositioning::TextPositioning() {
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pos = Vec2F();
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hAnchor = HorizontalAnchor::LeftAnchor;
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vAnchor = VerticalAnchor::BottomAnchor;
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}
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TextPositioning::TextPositioning(Vec2F pos, HorizontalAnchor hAnchor, VerticalAnchor vAnchor,
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Maybe<unsigned> wrapWidth, Maybe<unsigned> charLimit)
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: pos(pos), hAnchor(hAnchor), vAnchor(vAnchor), wrapWidth(wrapWidth), charLimit(charLimit) {}
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TextPositioning::TextPositioning(Json const& v) {
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pos = v.opt("position").apply(jsonToVec2F).value();
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hAnchor = HorizontalAnchorNames.getLeft(v.getString("horizontalAnchor", "left"));
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vAnchor = VerticalAnchorNames.getLeft(v.getString("verticalAnchor", "top"));
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wrapWidth = v.optUInt("wrapWidth");
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charLimit = v.optUInt("charLimit");
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}
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Json TextPositioning::toJson() const {
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return JsonObject{
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{"position", jsonFromVec2F(pos)},
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{"horizontalAnchor", HorizontalAnchorNames.getRight(hAnchor)},
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{"verticalAnchor", VerticalAnchorNames.getRight(vAnchor)},
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{"wrapWidth", jsonFromMaybe(wrapWidth)}
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};
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}
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TextPositioning TextPositioning::translated(Vec2F translation) const {
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return {pos + translation, hAnchor, vAnchor, wrapWidth, charLimit};
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}
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TextPainter::TextPainter(RendererPtr renderer, TextureGroupPtr textureGroup)
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: m_renderer(renderer),
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m_fontTextureGroup(textureGroup),
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m_fontSize(8),
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m_lineSpacing(1.30f),
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m_renderSettings({FontMode::Normal, Vec4B::filled(255), "hobo", ""}) {
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reloadFonts();
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m_reloadTracker = make_shared<TrackerListener>();
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Root::singleton().registerReloadListener(m_reloadTracker);
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}
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RectF TextPainter::renderText(StringView s, TextPositioning const& position) {
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if (position.charLimit) {
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unsigned charLimit = *position.charLimit;
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return doRenderText(s, position, true, &charLimit);
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} else {
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return doRenderText(s, position, true, nullptr);
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}
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}
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RectF TextPainter::renderLine(StringView s, TextPositioning const& position) {
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if (position.charLimit) {
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unsigned charLimit = *position.charLimit;
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return doRenderLine(s, position, true, &charLimit);
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} else {
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return doRenderLine(s, position, true, nullptr);
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}
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}
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RectF TextPainter::renderGlyph(String::Char c, TextPositioning const& position) {
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return doRenderGlyph(c, position, true);
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}
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RectF TextPainter::determineTextSize(StringView s, TextPositioning const& position) {
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return doRenderText(s, position, false, nullptr);
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}
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RectF TextPainter::determineLineSize(StringView s, TextPositioning const& position) {
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return doRenderLine(s, position, false, nullptr);
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}
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RectF TextPainter::determineGlyphSize(String::Char c, TextPositioning const& position) {
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return doRenderGlyph(c, position, false);
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}
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int TextPainter::glyphWidth(String::Char c) {
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return m_fontTextureGroup.glyphWidth(c, m_fontSize);
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}
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int TextPainter::stringWidth(StringView s) {
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if (s.empty())
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return 0;
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String font = m_renderSettings.font, setFont = font;
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m_fontTextureGroup.switchFont(font);
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int width = 0;
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Text::CommandsCallback commandsCallback = [&](StringView commands) {
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commands.forEachSplitView(",", [&](StringView command, size_t, size_t) {
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if (command == "reset")
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m_fontTextureGroup.switchFont(font = setFont);
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else if (command == "set")
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setFont = font;
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else if (command.beginsWith("font="))
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m_fontTextureGroup.switchFont(font = command.substr(5));
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});
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return true;
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};
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Text::TextCallback textCallback = [&](StringView text) {
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for (String::Char c : text)
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width += glyphWidth(c);
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return true;
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};
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Text::processText(s, textCallback, commandsCallback);
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return width;
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}
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bool TextPainter::processWrapText(StringView text, unsigned* wrapWidth, WrapTextCallback textFunc) {
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String font = m_renderSettings.font, setFont = font;
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m_fontTextureGroup.switchFont(font);
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int lines = 0;
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size_t i = 0;
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auto it = text.begin();
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auto end = text.end();
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unsigned lineStart = 0; // Where does this line start ?
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unsigned linePixelWidth = 0; // How wide is this line so far
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unsigned lineCharSize = 0; // how many characters in this line ?
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auto escIt = end;
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unsigned splitPos = 0; // Where did we last see a place to split the string ?
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unsigned splitWidth = 0; // How wide was the string there ?
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auto lineStartIt = it; // Where does this line start ?
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auto splitIt = end;
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auto slice = [](StringView::const_iterator a, StringView::const_iterator b) -> StringView {
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const char* aPtr = &*a.base();
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return StringView(aPtr, &*b.base() - aPtr);
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};
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while (it != end) {
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auto character = *it;
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if (Text::isEscapeCode(character))
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escIt = it;
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++i;
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if (escIt != end) {
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if (character == Text::EndEsc) {
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StringView inner = slice(escIt, it);
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inner.forEachSplitView(",", [&](StringView command, size_t, size_t) {
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if (command == "reset")
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m_fontTextureGroup.switchFont(font = setFont);
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else if (command == "set")
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setFont = font;
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else if (command.beginsWith("font="))
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m_fontTextureGroup.switchFont(font = command.substr(5));
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});
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escIt = end;
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}
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lineCharSize++;
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} else {
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lineCharSize++; // assume at least one character if we get here.
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// is this a linefeed / cr / whatever that forces a line split ?
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if (character == '\n' || character == '\v') {
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// knock one off the end because we don't render the CR
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if (!textFunc(slice(lineStartIt, it), lines++))
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return false;
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lineStart += lineCharSize;
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lineStartIt = it;
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++lineStartIt;
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lineCharSize = linePixelWidth = splitPos = 0; // ...with no characters in it and no known splits.
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} else {
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int charWidth = glyphWidth(character);
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// is it a place where we might want to split the line ?
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if (character == ' ' || character == '\t') {
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splitPos = lineStart + lineCharSize; // this is the character after the space.
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splitWidth = linePixelWidth + charWidth; // the width of the string at
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splitIt = it;
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++splitIt;
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// the split point, i.e. after the space.
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}
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// would the line be too long if we render this next character ?
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if (wrapWidth && (linePixelWidth + charWidth) > *wrapWidth) {
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// did we find somewhere to split the line ?
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if (splitPos) {
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if (!textFunc(slice(lineStartIt, splitIt), lines++))
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return false;
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unsigned stringEnd = lineStart + lineCharSize;
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lineCharSize = stringEnd - splitPos; // next line has the characters after the space.
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unsigned stringWidth = (linePixelWidth - splitWidth);
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linePixelWidth = stringWidth + charWidth; // and is as wide as the bit after the space.
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lineStart = splitPos;
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lineStartIt = splitIt;
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splitPos = 0;
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} else {
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if (!textFunc(slice(lineStartIt, it), lines++))
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return false;
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lineStart += lineCharSize - 1;
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lineStartIt = it; // include that character on the next line.
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lineCharSize = 1; // next line has that character in
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linePixelWidth = charWidth; // and is as wide as that character
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}
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} else {
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linePixelWidth += charWidth;
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}
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}
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}
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++it;
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};
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// if we hit the end of the string before hitting the end of the line.
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if (lineCharSize > 0)
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return textFunc(slice(lineStartIt, end), lines);
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return true;
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}
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List<StringView> TextPainter::wrapTextViews(StringView s, Maybe<unsigned> wrapWidth) {
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List<StringView> views = {};
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bool active = false;
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StringView current;
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int lastLine = 0;
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auto addText = [&active, ¤t](StringView text) {
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// Merge views if they are adjacent
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if (active && current.utf8Ptr() + current.utf8Size() == text.utf8Ptr())
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current = StringView(current.utf8Ptr(), current.utf8Size() + text.utf8Size());
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else
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current = text;
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active = true;
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};
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TextPainter::WrapTextCallback textCallback = [&](StringView text, int line) {
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if (lastLine != line) {
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views.push_back(current);
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lastLine = line;
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active = false;
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}
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addText(text);
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return true;
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};
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processWrapText(s, wrapWidth.ptr(), textCallback);
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if (active)
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views.push_back(current);
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return views;
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}
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StringList TextPainter::wrapText(StringView s, Maybe<unsigned> wrapWidth) {
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StringList result;
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String current;
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int lastLine = 0;
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TextPainter::WrapTextCallback textCallback = [&](StringView text, int line) {
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if (lastLine != line) {
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result.append(move(current));
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lastLine = line;
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}
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current += text;
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return true;
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};
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processWrapText(s, wrapWidth.ptr(), textCallback);
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if (!current.empty())
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result.append(move(current));
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return result;
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};
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unsigned TextPainter::fontSize() const {
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return m_fontSize;
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}
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void TextPainter::setFontSize(unsigned size) {
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m_fontSize = size;
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}
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void TextPainter::setLineSpacing(float lineSpacing) {
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m_lineSpacing = lineSpacing;
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}
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void TextPainter::setMode(FontMode mode) {
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m_renderSettings.mode = mode;
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}
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void TextPainter::setFontColor(Vec4B color) {
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m_renderSettings.color = move(color);
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}
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void TextPainter::setProcessingDirectives(StringView directives) {
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m_renderSettings.directives = String(directives);
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if (m_renderSettings.directives) {
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m_renderSettings.directives.loadOperations();
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for (auto& entry : m_renderSettings.directives.shared->entries) {
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if (auto border = entry.operation.ptr<BorderImageOperation>())
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border->includeTransparent = true;
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}
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}
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}
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void TextPainter::setFont(String const& font) {
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m_renderSettings.font = font;
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}
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void TextPainter::addFont(FontPtr const& font, String const& name) {
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m_fontTextureGroup.addFont(font, name);
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}
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void TextPainter::reloadFonts() {
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m_fontTextureGroup.clearFonts();
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m_fontTextureGroup.cleanup(0);
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auto assets = Root::singleton().assets();
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auto defaultFont = assets->font("/hobo.ttf");
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for (auto& fontPath : assets->scanExtension("ttf")) {
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auto font = assets->font(fontPath);
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if (font == defaultFont)
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continue;
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auto fileName = AssetPath::filename(fontPath);
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addFont(font->clone(), fileName.substr(0, fileName.findLast(".")));
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}
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m_fontTextureGroup.addFont(defaultFont->clone(), "hobo", true);
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}
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void TextPainter::cleanup(int64_t timeout) {
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m_fontTextureGroup.cleanup(timeout);
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}
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void TextPainter::applyCommands(StringView unsplitCommands) {
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unsplitCommands.forEachSplitView(",", [&](StringView command, size_t, size_t) {
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try {
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if (command == "reset") {
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m_renderSettings = m_savedRenderSettings;
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} else if (command == "set") {
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m_savedRenderSettings = m_renderSettings;
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} else if (command == "shadow") {
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m_renderSettings.mode = (FontMode)((int)m_renderSettings.mode | (int)FontMode::Shadow);
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} else if (command == "noshadow") {
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m_renderSettings.mode = (FontMode)((int)m_renderSettings.mode & (-1 ^ (int)FontMode::Shadow));
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} else if (command.beginsWith("font=")) {
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m_renderSettings.font = command.substr(5);
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} else if (command.beginsWith("directives=")) {
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// Honestly this is really stupid but I just couldn't help myself
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// Should probably limit in the future
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setProcessingDirectives(command.substr(11));
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} else {
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// expects both #... sequences and plain old color names.
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Color c = Color(command);
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c.setAlphaF(c.alphaF() * ((float)m_savedRenderSettings.color[3]) / 255);
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m_renderSettings.color = c.toRgba();
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}
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} catch (JsonException&) {
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} catch (ColorException&) {
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}
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});
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}
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RectF TextPainter::doRenderText(StringView s, TextPositioning const& position, bool reallyRender, unsigned* charLimit) {
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Vec2F pos = position.pos;
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if (s.empty())
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return RectF(pos, pos);
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List<StringView> lines = wrapTextViews(s, position.wrapWidth);
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int height = (lines.size() - 1) * m_lineSpacing * m_fontSize + m_fontSize;
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RenderSettings backupRenderSettings = m_renderSettings;
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m_savedRenderSettings = m_renderSettings;
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if (position.vAnchor == VerticalAnchor::BottomAnchor)
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pos[1] += (height - m_fontSize);
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else if (position.vAnchor == VerticalAnchor::VMidAnchor)
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pos[1] += (height - m_fontSize) / 2;
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RectF bounds = RectF::withSize(pos, Vec2F());
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for (auto& i : lines) {
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bounds.combine(doRenderLine(i, { pos, position.hAnchor, position.vAnchor }, reallyRender, charLimit));
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pos[1] -= m_fontSize * m_lineSpacing;
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if (charLimit && *charLimit == 0)
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break;
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}
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m_renderSettings = move(backupRenderSettings);
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return bounds;
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}
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RectF TextPainter::doRenderLine(StringView text, TextPositioning const& position, bool reallyRender, unsigned* charLimit) {
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if (m_reloadTracker->pullTriggered())
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reloadFonts();
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TextPositioning pos = position;
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if (pos.hAnchor == HorizontalAnchor::RightAnchor) {
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StringView trimmedString = charLimit ? text.substr(0, *charLimit) : text;
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pos.pos[0] -= stringWidth(trimmedString);
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pos.hAnchor = HorizontalAnchor::LeftAnchor;
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} else if (pos.hAnchor == HorizontalAnchor::HMidAnchor) {
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StringView trimmedString = charLimit ? text.substr(0, *charLimit) : text;
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pos.pos[0] -= floor((float)stringWidth(trimmedString) / 2);
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pos.hAnchor = HorizontalAnchor::LeftAnchor;
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}
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bool escape = false;
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String escapeCode;
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RectF bounds = RectF::withSize(pos.pos, Vec2F());
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Text::TextCallback textCallback = [&](StringView text) {
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for (String::Char c : text) {
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if (charLimit) {
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if (*charLimit == 0)
|
|
return false;
|
|
else
|
|
--* charLimit;
|
|
}
|
|
|
|
RectF glyphBounds = doRenderGlyph(c, pos, reallyRender);
|
|
bounds.combine(glyphBounds);
|
|
pos.pos[0] += glyphBounds.width();
|
|
}
|
|
return true;
|
|
};
|
|
|
|
Text::CommandsCallback commandsCallback = [&](StringView commands) {
|
|
applyCommands(commands);
|
|
return true;
|
|
};
|
|
|
|
m_fontTextureGroup.switchFont(m_renderSettings.font);
|
|
Text::processText(text, textCallback, commandsCallback);
|
|
|
|
return bounds;
|
|
}
|
|
|
|
RectF TextPainter::doRenderGlyph(String::Char c, TextPositioning const& position, bool reallyRender) {
|
|
if (c == '\n' || c == '\v' || c == '\r')
|
|
return RectF();
|
|
m_fontTextureGroup.switchFont(m_renderSettings.font);
|
|
|
|
int width = glyphWidth(c);
|
|
// Offset left by width if right anchored.
|
|
float hOffset = 0;
|
|
if (position.hAnchor == HorizontalAnchor::RightAnchor)
|
|
hOffset = -width;
|
|
else if (position.hAnchor == HorizontalAnchor::HMidAnchor)
|
|
hOffset = -floor((float)width / 2);
|
|
|
|
float vOffset = 0;
|
|
if (position.vAnchor == VerticalAnchor::VMidAnchor)
|
|
vOffset = -floor((float)m_fontSize / 2);
|
|
else if (position.vAnchor == VerticalAnchor::TopAnchor)
|
|
vOffset = -(float)m_fontSize;
|
|
|
|
Directives* directives = m_renderSettings.directives ? &m_renderSettings.directives : nullptr;
|
|
|
|
if (reallyRender) {
|
|
if ((int)m_renderSettings.mode & (int)FontMode::Shadow) {
|
|
Color shadow = Color::Black;
|
|
uint8_t alphaU = m_renderSettings.color[3];
|
|
if (alphaU != 255) {
|
|
float alpha = byteToFloat(alphaU);
|
|
shadow.setAlpha(floatToByte(alpha * (1.5f - 0.5f * alpha)));
|
|
}
|
|
else
|
|
shadow.setAlpha(alphaU);
|
|
|
|
//Kae: Draw only one shadow glyph instead of stacking two, alpha modified to appear perceptually the same as vanilla
|
|
renderGlyph(c, position.pos + Vec2F(hOffset, vOffset - 2), m_fontSize, 1, shadow.toRgba(), directives);
|
|
}
|
|
|
|
renderGlyph(c, position.pos + Vec2F(hOffset, vOffset), m_fontSize, 1, m_renderSettings.color, directives);
|
|
}
|
|
|
|
return RectF::withSize(position.pos + Vec2F(hOffset, vOffset), {(float)width, (int)m_fontSize});
|
|
}
|
|
|
|
void TextPainter::renderGlyph(String::Char c, Vec2F const& screenPos, unsigned fontSize,
|
|
float scale, Vec4B const& color, Directives const* processingDirectives) {
|
|
if (!fontSize)
|
|
return;
|
|
|
|
const FontTextureGroup::GlyphTexture& glyphTexture = m_fontTextureGroup.glyphTexture(c, fontSize, processingDirectives);
|
|
Vec2F offset = glyphTexture.offset * scale;
|
|
m_renderer->immediatePrimitives().emplace_back(std::in_place_type_t<RenderQuad>(), glyphTexture.texture, Vec2F::round(screenPos + offset), scale, color, 0.0f);
|
|
}
|
|
|
|
}
|