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fix: harden map projection boundaries

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torlando-agent[bot]
2026-08-07 01:23:28 +00:00
parent bb2e4d9499
commit 9552a7b970
2 changed files with 33 additions and 3 deletions
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lib/tdeck_ui/UI/LXMF/MapProjection.cpp
+16 -3
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@@ -76,7 +76,13 @@ double normalizeLongitude(double longitude) {
if (!finite(longitude)) {
return longitude;
}
return wrap(longitude + 180.0, 360.0) - 180.0;
double result = std::fmod(longitude, 360.0);
if (result >= 180.0) {
result -= 360.0;
} else if (result < -180.0) {
result += 360.0;
}
return result;
}
bool isValidZoom(std::uint32_t zoom) {
@@ -195,10 +201,17 @@ Status viewportTiles(const Viewport& viewport,
return Status::INVALID_ARGUMENT;
}
const double world = worldPixels(zoom);
const double clipped_top = viewport.top < 0.0 ? 0.0 : viewport.top;
const double clipped_bottom = bottom > world ? world : bottom;
if (clipped_top >= clipped_bottom) {
return Status::OK;
}
double first_x_value = std::floor(viewport.left / tile_size);
double last_x_value = std::ceil(right / tile_size) - 1.0;
double first_y_value = std::floor(viewport.top / tile_size);
double last_y_value = std::ceil(bottom / tile_size) - 1.0;
double first_y_value = std::floor(clipped_top / tile_size);
double last_y_value = std::ceil(clipped_bottom / tile_size) - 1.0;
if (include_border) {
first_x_value -= 1.0;
last_x_value += 1.0;