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Stabilize auto-resize

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The window dimensions are integers, so resizing to fit the content may
not be exact.

When computing the optimal size, it could cause to reduce alternatively
the width and height by few pixels, making the "optimal size" unstable.

To avoid this problem, check if the optimal size is already correct
either by keeping the width or the height.
This commit is contained in:
Romain Vimont 2020-04-24 22:52:02 +02:00
parent 92cb3a6661
commit 8581d6850b
1 changed files with 7 additions and 0 deletions
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7
app/src/screen.c
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@ -113,6 +113,13 @@ get_optimal_size(struct size current_size, struct size content_size) {
h = MIN(current_size.height, display_size.height); h = MIN(current_size.height, display_size.height);
} }
if (h == w * content_size.height / content_size.width
|| w == h * content_size.width / content_size.height) {
// The size is already optimal, if we ignore rounding errors due to
// integer window dimensions
return (struct size) {w, h};
}
bool keep_width = content_size.width * h > content_size.height * w; bool keep_width = content_size.width * h > content_size.height * w;
if (keep_width) { if (keep_width) {
// remove black borders on top and bottom // remove black borders on top and bottom