When creating a drm_fb from client (wl_buffer/dmabuf), gbm_surface, or client buffers, set fb->size to 0. The size member is only used for dumb buffers, where we mmap the whole buffer, and need the size recorded to later pass to munmap.
Determining the full size of multi-planar buffers is difficult, as auxiliary planes are not guaranteed to have a (height*stride) allocation, e.g. if they are subsampled or if they do not contain pixel data at all but, e.g., compression information. Single-plane tiled buffers also often pad the buffer allocation to a multiple of tile height, making our existing calculation incorrect. Though it does no harm to record incorrect information, it also does no good as we never use it; remove it in order to avoid any confusion. Signed-off-by: Daniel Stone <[email protected]> --- libweston/compositor-drm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c index 7753dfba6..29fa98da6 100644 --- a/libweston/compositor-drm.c +++ b/libweston/compositor-drm.c @@ -1063,7 +1063,7 @@ drm_fb_get_from_bo(struct gbm_bo *bo, struct drm_backend *backend, fb->handles[0] = gbm_bo_get_handle(bo).u32; fb->format = pixel_format_get_info(gbm_bo_get_format(bo)); fb->modifier = DRM_FORMAT_MOD_INVALID; - fb->size = fb->strides[0] * fb->height; + fb->size = 0; fb->fd = backend->drm.fd; if (!fb->format) { -- 2.17.1 _______________________________________________ wayland-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/wayland-devel
