mirror of
https://github.com/daveallie/crosspoint-reader.git
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aa2467de9e
Adds an inverseDisplay setting that renders white text on a black background in both EPUB and TXT readers. The grayscale anti-aliasing passes swap the LSB gray level condition based on text direction (pixelState/black parameter) so intermediate gray values render correctly against the dark background.
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
#include "TextBlock.h"
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#include <GfxRenderer.h>
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#include <Serialization.h>
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void TextBlock::render(const GfxRenderer& renderer, const int fontId, const int x, const int y,
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const bool black) const {
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// Validate iterator bounds before rendering
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if (words.size() != wordXpos.size() || words.size() != wordStyles.size()) {
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Serial.printf("[%lu] [TXB] Render skipped: size mismatch (words=%u, xpos=%u, styles=%u)\n", millis(),
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(uint32_t)words.size(), (uint32_t)wordXpos.size(), (uint32_t)wordStyles.size());
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return;
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}
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auto wordIt = words.begin();
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auto wordStylesIt = wordStyles.begin();
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auto wordXposIt = wordXpos.begin();
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for (size_t i = 0; i < words.size(); i++) {
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renderer.drawText(fontId, *wordXposIt + x, y, wordIt->c_str(), black, *wordStylesIt);
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std::advance(wordIt, 1);
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std::advance(wordStylesIt, 1);
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std::advance(wordXposIt, 1);
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}
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}
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bool TextBlock::serialize(FsFile& file) const {
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if (words.size() != wordXpos.size() || words.size() != wordStyles.size()) {
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Serial.printf("[%lu] [TXB] Serialization failed: size mismatch (words=%u, xpos=%u, styles=%u)\n", millis(),
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words.size(), wordXpos.size(), wordStyles.size());
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return false;
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}
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// Word data
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serialization::writePod(file, static_cast<uint16_t>(words.size()));
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for (const auto& w : words) serialization::writeString(file, w);
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for (auto x : wordXpos) serialization::writePod(file, x);
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for (auto s : wordStyles) serialization::writePod(file, s);
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// Block style
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serialization::writePod(file, style);
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return true;
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}
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std::unique_ptr<TextBlock> TextBlock::deserialize(FsFile& file) {
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uint16_t wc;
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std::list<std::string> words;
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std::list<uint16_t> wordXpos;
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std::list<EpdFontFamily::Style> wordStyles;
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Style style;
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// Word count
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serialization::readPod(file, wc);
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// Sanity check: prevent allocation of unreasonably large lists (max 10000 words per block)
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if (wc > 10000) {
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Serial.printf("[%lu] [TXB] Deserialization failed: word count %u exceeds maximum\n", millis(), wc);
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return nullptr;
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}
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// Word data
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words.resize(wc);
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wordXpos.resize(wc);
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wordStyles.resize(wc);
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for (auto& w : words) serialization::readString(file, w);
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for (auto& x : wordXpos) serialization::readPod(file, x);
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for (auto& s : wordStyles) serialization::readPod(file, s);
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// Block style
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serialization::readPod(file, style);
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return std::unique_ptr<TextBlock>(new TextBlock(std::move(words), std::move(wordXpos), std::move(wordStyles), style));
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}
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