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backend/drm: Fix hardware cursors when rendering to linear is not available

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GPUs such as NVIDIA and VmWare do not support rendering to a linear
buffer, but require linear cursor buffers. This means we have to
render to some other format, and then convert it ourselves.

This change advertises any render format as an available cursor format.
This commit is contained in:
Austin Shafer 2024-02-05 16:04:56 -05:00
parent 5a2e98e6c2
commit 02cf478581
4 changed files with 134 additions and 16 deletions
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12
types/output/cursor.c
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@ -171,7 +171,17 @@ static bool output_pick_cursor_format(struct wlr_output *output,
}
}
return output_pick_format(output, display_formats, format, DRM_FORMAT_ARGB8888);
// If this fails to find a shared modifier try to use a linear
// modifier. This avoids a scenario where the hardware cannot render to
// linear textures but only linear textures are supported for cursors,
// as is the case with Nvidia and VmWare GPUs
if (!output_pick_format(output, display_formats, format, DRM_FORMAT_ARGB8888)) {
// Clear the format as output_pick_format doesn't zero it
memset(format, 0, sizeof(*format));
return output_pick_format(output, NULL, format, DRM_FORMAT_ARGB8888);
}
return true;
}
static struct wlr_buffer *render_cursor_buffer(struct wlr_output_cursor *cursor) {