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Feature/cover crop mode (#225)

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Added a setting to select `fit` or `crop` for cover image on sleep
screen.

Might add a `expand` feature in the future that does not crop but rather
fills the blank space with a mirror of the image.

---------

Co-authored-by: Dave Allie <dave@daveallie.com>
This commit is contained in:
Jonas Diemer
2026-01-05 11:07:27 +01:00
committed by GitHub
parent 9f95b31de5
commit afe9672156
9 changed files with 70 additions and 37 deletions
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29
src/activities/boot_sleep/SleepActivity.cpp
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@@ -146,20 +146,36 @@ void SleepActivity::renderBitmapSleepScreen(const Bitmap& bitmap) const {
int x, y;
const auto pageWidth = renderer.getScreenWidth();
const auto pageHeight = renderer.getScreenHeight();
float cropX = 0, cropY = 0;
Serial.printf("[%lu] [SLP] bitmap %d x %d, screen %d x %d\n", millis(), bitmap.getWidth(), bitmap.getHeight(),
pageWidth, pageHeight);
if (bitmap.getWidth() > pageWidth || bitmap.getHeight() > pageHeight) {
// image will scale, make sure placement is right
const float ratio = static_cast<float>(bitmap.getWidth()) / static_cast<float>(bitmap.getHeight());
float ratio = static_cast<float>(bitmap.getWidth()) / static_cast<float>(bitmap.getHeight());
const float screenRatio = static_cast<float>(pageWidth) / static_cast<float>(pageHeight);
Serial.printf("[%lu] [SLP] bitmap ratio: %f, screen ratio: %f\n", millis(), ratio, screenRatio);
if (ratio > screenRatio) {
// image wider than viewport ratio, scaled down image needs to be centered vertically
if (SETTINGS.sleepScreenCoverMode == CrossPointSettings::SLEEP_SCREEN_COVER_MODE::CROP) {
cropX = 1.0f - (screenRatio / ratio);
Serial.printf("[%lu] [SLP] Cropping bitmap x: %f\n", millis(), cropX);
ratio = (1.0f - cropX) * static_cast<float>(bitmap.getWidth()) / static_cast<float>(bitmap.getHeight());
}
x = 0;
y = (pageHeight - pageWidth / ratio) / 2;
y = std::round((static_cast<float>(pageHeight) - static_cast<float>(pageWidth) / ratio) / 2);
Serial.printf("[%lu] [SLP] Centering with ratio %f to y=%d\n", millis(), ratio, y);
} else {
// image taller than viewport ratio, scaled down image needs to be centered horizontally
x = (pageWidth - pageHeight * ratio) / 2;
if (SETTINGS.sleepScreenCoverMode == CrossPointSettings::SLEEP_SCREEN_COVER_MODE::CROP) {
cropY = 1.0f - (ratio / screenRatio);
Serial.printf("[%lu] [SLP] Cropping bitmap y: %f\n", millis(), cropY);
ratio = static_cast<float>(bitmap.getWidth()) / ((1.0f - cropY) * static_cast<float>(bitmap.getHeight()));
}
x = std::round((pageWidth - pageHeight * ratio) / 2);
y = 0;
Serial.printf("[%lu] [SLP] Centering with ratio %f to x=%d\n", millis(), ratio, x);
}
} else {
// center the image
@@ -167,21 +183,22 @@ void SleepActivity::renderBitmapSleepScreen(const Bitmap& bitmap) const {
y = (pageHeight - bitmap.getHeight()) / 2;
}
Serial.printf("[%lu] [SLP] drawing to %d x %d\n", millis(), x, y);
renderer.clearScreen();
renderer.drawBitmap(bitmap, x, y, pageWidth, pageHeight);
renderer.drawBitmap(bitmap, x, y, pageWidth, pageHeight, cropX, cropY);
renderer.displayBuffer(EInkDisplay::HALF_REFRESH);
if (bitmap.hasGreyscale()) {
bitmap.rewindToData();
renderer.clearScreen(0x00);
renderer.setRenderMode(GfxRenderer::GRAYSCALE_LSB);
renderer.drawBitmap(bitmap, x, y, pageWidth, pageHeight);
renderer.drawBitmap(bitmap, x, y, pageWidth, pageHeight, cropX, cropY);
renderer.copyGrayscaleLsbBuffers();
bitmap.rewindToData();
renderer.clearScreen(0x00);
renderer.setRenderMode(GfxRenderer::GRAYSCALE_MSB);
renderer.drawBitmap(bitmap, x, y, pageWidth, pageHeight);
renderer.drawBitmap(bitmap, x, y, pageWidth, pageHeight, cropX, cropY);
renderer.copyGrayscaleMsbBuffers();
renderer.displayGrayBuffer();