Multi-plane sub-sampled textures have partial width/height, e.g. YUV420/I420 has a full-size Y plane, followed by a half-width/height U plane, and a half-width/height V plane.
zwp_linux_dmabuf_v1 allows clients to pass an explicit pitch for each plane, but for wl_shm this must be inferred. gl-renderer was correctly accounting for the width and height when subsampling, but the pitch was being taken as the pitch for the first plane. This does not match the requirements for GStreamer's waylandsink, in particular, as well as other clients. Fix the SHM upload path to correctly set the pitch for each plane, according to subsampling. Tested with: $ gst-launch-1.0 videotestsrc ! waylandsink Signed-off-by: Daniel Stone <[email protected]> Fixes: fdeefe42418 ("gl-renderer: add support of WL_SHM_FORMAT_YUV420") Reported-by: Fabien Lahoudere <[email protected]> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103063 Cc: Vincent Abriou <[email protected]> --- libweston/gl-renderer.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libweston/gl-renderer.c b/libweston/gl-renderer.c index 244ce309..40bf0bb6 100644 --- a/libweston/gl-renderer.c +++ b/libweston/gl-renderer.c @@ -1445,14 +1445,13 @@ gl_renderer_flush_damage(struct weston_surface *surface) goto done; } - glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, gs->pitch); - if (gs->needs_full_upload) { glPixelStorei(GL_UNPACK_SKIP_PIXELS_EXT, 0); glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, 0); wl_shm_buffer_begin_access(buffer->shm_buffer); for (j = 0; j < gs->num_textures; j++) { glBindTexture(GL_TEXTURE_2D, gs->textures[j]); + glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, gs->pitch / gs->hsub[j]); glTexImage2D(GL_TEXTURE_2D, 0, gs->gl_format[j], gs->pitch / gs->hsub[j], @@ -1477,6 +1476,7 @@ gl_renderer_flush_damage(struct weston_surface *surface) glPixelStorei(GL_UNPACK_SKIP_ROWS_EXT, r.y1); for (j = 0; j < gs->num_textures; j++) { glBindTexture(GL_TEXTURE_2D, gs->textures[j]); + glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, gs->pitch / gs->hsub[j]); glTexSubImage2D(GL_TEXTURE_2D, 0, r.x1 / gs->hsub[j], r.y1 / gs->vsub[j], -- 2.14.2 _______________________________________________ wayland-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/wayland-devel
