cottongin/crosspoint-reader-mod
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feat: Sleep screen letterbox fill and image upscaling
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Add configurable letterbox fill for sleep screen cover images that don't
match the display aspect ratio. Four fill modes are available: Solid
(single dominant edge shade), Blended (per-pixel edge colors), Gradient
(edge colors interpolated toward white/black), and None.

Enable upscaling of cover images smaller than the display in Fit mode by
modifying drawBitmap/drawBitmap1Bit to support both up and downscaling
via a unified block-fill approach.

Edge sampling data is cached to .crosspoint alongside the cover BMP to
avoid redundant bitmap scanning on subsequent sleeps. Cache is validated
against screen dimensions and auto-regenerated when stale.

New settings: Letterbox Fill (None/Solid/Blended/Gradient) and Gradient
Direction (To White/To Black).

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
cottongin
2026-02-09 11:52:55 -05:00
parent a85d5e627b
commit 4edb14bdd9
9 changed files with 582 additions and 63 deletions
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8
src/CrossPointSettings.cpp
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@@ -22,7 +22,7 @@ void readAndValidate(FsFile& file, uint8_t& member, const uint8_t maxValue) {
namespace {
constexpr uint8_t SETTINGS_FILE_VERSION = 1;
// Increment this when adding new persisted settings fields
constexpr uint8_t SETTINGS_COUNT = 30;
constexpr uint8_t SETTINGS_COUNT = 32;
constexpr char SETTINGS_FILE[] = "/.crosspoint/settings.bin";
// Validate front button mapping to ensure each hardware button is unique.
@@ -118,6 +118,8 @@ bool CrossPointSettings::saveToFile() const {
serialization::writePod(outputFile, frontButtonRight);
serialization::writePod(outputFile, fadingFix);
serialization::writePod(outputFile, embeddedStyle);
serialization::writePod(outputFile, sleepScreenLetterboxFill);
serialization::writePod(outputFile, sleepScreenGradientDir);
// New fields added at end for backward compatibility
outputFile.close();
@@ -223,6 +225,10 @@ bool CrossPointSettings::loadFromFile() {
if (++settingsRead >= fileSettingsCount) break;
serialization::readPod(inputFile, embeddedStyle);
if (++settingsRead >= fileSettingsCount) break;
readAndValidate(inputFile, sleepScreenLetterboxFill, SLEEP_SCREEN_LETTERBOX_FILL_COUNT);
if (++settingsRead >= fileSettingsCount) break;
readAndValidate(inputFile, sleepScreenGradientDir, SLEEP_SCREEN_GRADIENT_DIR_COUNT);
if (++settingsRead >= fileSettingsCount) break;
// New fields added at end for backward compatibility
} while (false);