538 lines
18 KiB
C++
538 lines
18 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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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_defaultRenderSettings(),
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m_renderSettings(),
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m_savedRenderSettings() {
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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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RectF rect;
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if (position.charLimit) {
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unsigned charLimit = *position.charLimit;
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rect = doRenderText(s, position, true, &charLimit);
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} else {
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rect = doRenderText(s, position, true, nullptr);
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}
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renderPrimitives();
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return rect;
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}
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RectF TextPainter::renderLine(StringView s, TextPositioning const& position) {
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RectF rect;
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if (position.charLimit) {
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unsigned charLimit = *position.charLimit;
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rect = doRenderLine(s, position, true, &charLimit);
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} else {
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rect = doRenderLine(s, position, true, nullptr);
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}
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renderPrimitives();
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return rect;
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}
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RectF TextPainter::renderGlyph(String::Char c, TextPositioning const& position) {
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auto rect = doRenderGlyph(c, position, true);
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renderPrimitives();
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return rect;
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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_renderSettings.fontSize);
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}
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int TextPainter::stringWidth(StringView s, unsigned charLimit) {
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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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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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});
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return true;
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};
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int width = 0;
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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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if (charLimit && --charLimit == 0)
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return false;
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}
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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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unsigned lines = 0;
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auto it = text.begin();
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auto end = text.end();
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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 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; // != end if we last saw a place to split the string
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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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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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});
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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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lineStartIt = it;
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++lineStartIt;
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// next line starts after the CR with no characters in it and no known splits.
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lineCharSize = linePixelWidth = 0;
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splitIt = end;
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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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splitIt = it;
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splitWidth = linePixelWidth + charWidth; // the width of the string at
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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 (splitIt != end) {
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if (!textFunc(slice(lineStartIt, splitIt), lines++))
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return false;
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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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lineStartIt = ++splitIt;
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splitIt = end;
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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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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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auto last = views.end();
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unsigned curLine = 0;
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TextPainter::WrapTextCallback textCallback = [&](StringView text, unsigned line) {
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if (line == curLine && last != views.end() && last->end() == text.begin()) {
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*last = StringView(last->utf8Ptr(), last->utf8Size() + text.utf8Size());
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} else {
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last = views.insert(views.end(), text);
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curLine = line;
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}
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return true;
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};
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processWrapText(s, wrapWidth.ptr(), textCallback);
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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, unsigned line) {
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if (lastLine != line) {
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result.append(std::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(std::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_renderSettings.fontSize;
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}
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void TextPainter::setFontSize(unsigned size) {
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m_renderSettings.fontSize = size;
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}
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void TextPainter::setLineSpacing(float lineSpacing) {
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m_renderSettings.lineSpacing = lineSpacing;
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}
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void TextPainter::setMode(FontMode mode) {
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m_renderSettings.shadow = fontModeToColor(mode).toRgba();
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}
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void TextPainter::setFontColor(Vec4B color) {
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m_renderSettings.color = std::move(color);
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}
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void TextPainter::setProcessingDirectives(StringView directives, bool back) {
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Directives& target = back ? m_renderSettings.backDirectives : m_renderSettings.directives;
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modifyDirectives(target = String(directives));
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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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TextStyle& TextPainter::setTextStyle(TextStyle const& textStyle) {
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TextStyle& style = m_renderSettings = textStyle;
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modifyDirectives(style.directives);
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modifyDirectives(style.backDirectives);
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return style;
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}
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void TextPainter::clearTextStyle() {
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m_renderSettings = m_defaultRenderSettings;
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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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String defaultName = "hobo";
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auto defaultFont = loadFont("/hobo.ttf", defaultName);
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auto loadFontsByExtension = [&](String const& ext) {
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for (auto& fontPath : assets->scanExtension(ext)) {
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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 name = AssetPath::filename(fontPath);
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name = name.substr(0, name.findLast("."));
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addFont(loadFont(fontPath, name), name);
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}
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};
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loadFontsByExtension("ttf");
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loadFontsByExtension("woff2");
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m_fontTextureGroup.addFont(defaultFont, defaultName, 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.beginsWith("shadow")) {
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if (command.utf8Size() == 6)
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m_renderSettings.shadow = Color::Black.toRgba();
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else if (command[6] == '=')
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m_renderSettings.shadow = Color(command.substr(7)).toRgba();
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} else if (command == "noshadow") {
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m_renderSettings.shadow = Color::Clear.toRgba();
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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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setProcessingDirectives(command.substr(11));
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} else if (command.beginsWith("backdirectives=")) {
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setProcessingDirectives(command.substr(15), true);
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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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void TextPainter::modifyDirectives(Directives& directives) {
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if (directives) {
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directives.loadOperations();
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for (auto& entry : directives->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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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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TextStyle backup = m_savedRenderSettings = m_renderSettings;
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int height = (lines.size() - 1) * backup.lineSpacing * backup.fontSize + backup.fontSize;
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if (position.vAnchor == VerticalAnchor::BottomAnchor)
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pos[1] += (height - backup.fontSize);
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else if (position.vAnchor == VerticalAnchor::VMidAnchor)
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pos[1] += (height - backup.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_renderSettings.fontSize * m_renderSettings.lineSpacing;
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if (charLimit && *charLimit == 0)
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break;
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}
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m_renderSettings = std::move(backup);
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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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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)
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return false;
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else
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--*charLimit;
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}
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RectF glyphBounds = doRenderGlyph(c, pos, reallyRender);
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bounds.combine(glyphBounds);
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pos.pos[0] += glyphBounds.width();
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}
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return true;
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};
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Text::CommandsCallback commandsCallback = [&](StringView commands) {
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applyCommands(commands);
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return true;
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};
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m_fontTextureGroup.switchFont(m_renderSettings.font);
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Text::processText(text, textCallback, commandsCallback);
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return bounds;
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}
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RectF TextPainter::doRenderGlyph(String::Char c, TextPositioning const& position, bool reallyRender) {
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if (c == '\n' || c == '\v' || c == '\r')
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return RectF();
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m_fontTextureGroup.switchFont(m_renderSettings.font);
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int width = glyphWidth(c);
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// Offset left by width if right anchored.
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float hOffset = 0;
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if (position.hAnchor == HorizontalAnchor::RightAnchor)
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hOffset = -width;
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else if (position.hAnchor == HorizontalAnchor::HMidAnchor)
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hOffset = -floor((float)width / 2);
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float vOffset = 0;
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if (position.vAnchor == VerticalAnchor::VMidAnchor)
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vOffset = -floor((float)m_renderSettings.fontSize / 2);
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else if (position.vAnchor == VerticalAnchor::TopAnchor)
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vOffset = -(float)m_renderSettings.fontSize;
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Directives* directives = m_renderSettings.directives ? &m_renderSettings.directives : nullptr;
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Vec2F pos = position.pos + Vec2F(hOffset, vOffset);
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if (reallyRender) {
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bool hasShadow = m_renderSettings.shadow[3] > 0;
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bool hasBackDirectives = m_renderSettings.backDirectives;
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if (hasShadow) {
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//Kae: unlike vanilla we draw only one shadow glyph instead of two, so i'm tweaking the alpha here
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Vec4B shadow = m_renderSettings.shadow;
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uint8_t alphaU = m_renderSettings.color[3] * byteToFloat(shadow[3]);
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if (alphaU != 255) {
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float alpha = byteToFloat(alphaU);
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shadow[3] = floatToByte(alpha * (1.5f - 0.5f * alpha));
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}
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else
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shadow[3] = alphaU;
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Directives const* shadowDirectives = hasBackDirectives ? &m_renderSettings.backDirectives : directives;
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renderGlyph(c, pos + Vec2F(0, -2), m_shadowPrimitives, m_renderSettings.fontSize, 1, shadow, shadowDirectives);
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}
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if (hasBackDirectives)
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renderGlyph(c, pos, m_backPrimitives, m_renderSettings.fontSize, 1, m_renderSettings.color, &m_renderSettings.backDirectives);
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auto& output = (hasShadow || hasBackDirectives) ? m_frontPrimitives : m_renderer->immediatePrimitives();
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renderGlyph(c, pos, output, m_renderSettings.fontSize, 1, m_renderSettings.color, directives);
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}
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return RectF::withSize(pos, {(float)width, (int)m_renderSettings.fontSize});
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}
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void TextPainter::renderPrimitives() {
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auto& destination = m_renderer->immediatePrimitives();
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std::move(std::begin(m_shadowPrimitives), std::end(m_shadowPrimitives), std::back_inserter(destination));
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m_shadowPrimitives.clear();
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std::move(std::begin(m_backPrimitives), std::end(m_backPrimitives), std::back_inserter(destination));
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m_backPrimitives.clear();
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std::move(std::begin(m_frontPrimitives), std::end(m_frontPrimitives), std::back_inserter(destination));
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m_frontPrimitives.clear();
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}
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void TextPainter::renderGlyph(String::Char c, Vec2F const& screenPos, List<RenderPrimitive>& out, unsigned fontSize,
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float scale, Vec4B const& color, Directives const* processingDirectives) {
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if (!fontSize)
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return;
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|
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const FontTextureGroup::GlyphTexture& glyphTexture = m_fontTextureGroup.glyphTexture(c, fontSize, processingDirectives);
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Vec2F offset = glyphTexture.offset * scale;
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out.emplace_back(std::in_place_type_t<RenderQuad>(), glyphTexture.texture, Vec2F::round(screenPos + offset), scale, color, 0.0f);
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}
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|
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FontPtr TextPainter::loadFont(String const& fontPath, Maybe<String> fontName) {
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|
if (!fontName) {
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auto name = AssetPath::filename(fontPath);
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|
fontName.emplace(name.substr(0, name.findLast(".")));
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|
}
|
|
|
|
auto assets = Root::singleton().assets();
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|
|
|
auto font = assets->font(fontPath)->clone();
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|
if (auto fontConfig = assets->json("/interface.config:font").opt(*fontName)) {
|
|
font->setAlphaThreshold(fontConfig->getUInt("alphaThreshold", 0));
|
|
}
|
|
return font;
|
|
}
|
|
}
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