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On ESP32-C3 with USB CDC, Serial.printf() blocks indefinitely when USB is not connected. This caused device freezes when booted without USB. Solution: Call Serial.setTxTimeoutMs(0) after Serial.begin() to make all Serial output non-blocking. Also added if (Serial) guards to high-traffic logging paths in EpubReaderActivity as belt-and-suspenders protection. Includes documentation of the debugging process and Serial call inventory. Also applies clang-format to fix pre-existing formatting issues.
34 lines
1.2 KiB
C++
34 lines
1.2 KiB
C++
#pragma once
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#include <Bitmap.h>
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#include <string>
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#include "../Activity.h"
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class SleepActivity final : public Activity {
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public:
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explicit SleepActivity(GfxRenderer& renderer, MappedInputManager& mappedInput)
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: Activity("Sleep", renderer, mappedInput) {}
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void onEnter() override;
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private:
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void renderPopup(const char* message) const;
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void renderDefaultSleepScreen() const;
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void renderCustomSleepScreen() const;
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void renderCoverSleepScreen() const;
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void renderBitmapSleepScreen(const Bitmap& bitmap, const std::string& bmpPath) const;
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void renderBlankSleepScreen() const;
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// Edge luminance caching helpers
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static std::string getEdgeCachePath(const std::string& bmpPath);
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EdgeLuminance getEdgeLuminance(const Bitmap& bitmap, const std::string& bmpPath) const;
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// Book-level edge cache helpers (for skipping book metadata loading)
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static std::string getBookEdgeCachePath(const std::string& bookPath);
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static std::string getCoverBmpPath(const std::string& cacheDir, const std::string& bookPath, bool cropped);
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bool tryRenderCachedCoverSleep(const std::string& bookPath, bool cropped) const;
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// Quantize luminance (0-255) to 4-level grayscale (0-3)
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static uint8_t quantizeGray(uint8_t lum);
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};
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