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backend/drm: add support for SIZE_HINTS property

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This property allows the driver to advertise support for multiple
cursor sizes. On Intel, using a smaller buffer size reduces power
consumption.

References: https://lore.kernel.org/dri-devel/20240227193523.5601-2-ville.syrjala@linux.intel.com/
This commit is contained in:
Simon Ser 2024-03-20 14:16:47 +01:00
parent 6f63f55ace
commit a35b4f059d
7 changed files with 106 additions and 17 deletions
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24
types/output/cursor.c
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@ -196,13 +196,27 @@ static struct wlr_buffer *render_cursor_buffer(struct wlr_output_cursor *cursor)
int width = cursor->width;
int height = cursor->height;
if (output->impl->get_cursor_size) {
if (output->impl->get_cursor_sizes) {
// Apply hardware limitations on buffer size
output->impl->get_cursor_size(cursor->output, &width, &height);
if ((int)texture->width > width || (int)texture->height > height) {
size_t sizes_len = 0;
const struct wlr_output_cursor_size *sizes =
output->impl->get_cursor_sizes(cursor->output, &sizes_len);
bool found = false;
for (size_t i = 0; i < sizes_len; i++) {
struct wlr_output_cursor_size size = sizes[i];
if ((int)texture->width <= size.width && (int)texture->height <= size.height) {
width = size.width;
height = size.height;
found = true;
break;
}
}
if (!found) {
wlr_log(WLR_DEBUG, "Cursor texture too large (%dx%d), "
"exceeds hardware limitations (%dx%d)", texture->width,
texture->height, width, height);
"exceeds hardware limitations", texture->width,
texture->height);
return NULL;
}
}