diff options
Diffstat (limited to 'unstable')
| -rw-r--r-- | unstable/linux-dmabuf/linux-dmabuf-unstable-v1.xml | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/unstable/linux-dmabuf/linux-dmabuf-unstable-v1.xml b/unstable/linux-dmabuf/linux-dmabuf-unstable-v1.xml index 154afe2..b43e81c 100644 --- a/unstable/linux-dmabuf/linux-dmabuf-unstable-v1.xml +++ b/unstable/linux-dmabuf/linux-dmabuf-unstable-v1.xml @@ -28,6 +28,7 @@ <description summary="factory for creating dmabuf-based wl_buffers"> Following the interfaces from: https://www.khronos.org/registry/egl/extensions/EXT/EGL_EXT_image_dma_buf_import.txt + https://www.khronos.org/registry/EGL/extensions/EXT/EGL_EXT_image_dma_buf_import_modifiers.txt and the Linux DRM sub-system's AddFb2 ioctl. This interface offers ways to create generic dmabuf-based @@ -129,8 +130,16 @@ binds to this interface. A roundtrip after binding guarantees that the client has received all supported format-modifier pairs. + For legacy support, DRM_FORMAT_MOD_INVALID (that is, modifier_hi == + 0x00ffffff and modifier_lo == 0xffffffff) is allowed in this event. + It indicates that the server can support the format with an implicit + modifier. When a plane has DRM_FORMAT_MOD_INVALID as its modifier, it + is as if no explicit modifier is specified. The effective modifier + will be derived from the dmabuf. + For the definition of the format and modifier codes, see the - zwp_linux_buffer_params_v1::create request. + zwp_linux_buffer_params_v1::create and zwp_linux_buffer_params_v1::add + requests. </description> <arg name="format" type="uint" summary="DRM_FORMAT code"/> <arg name="modifier_hi" type="uint" @@ -197,6 +206,11 @@ compression, etc. driver-specific modifications to the base format defined by the DRM fourcc code. + Warning: It should be an error if the format/modifier pair was not + advertised with the modifier event. This is not enforced yet because + some implementations always accept DRM_FORMAT_MOD_INVALID. Also + version 2 of this protocol does not have the modifier event. + This request raises the PLANE_IDX error if plane_idx is too large. The error PLANE_SET is raised if attempting to set a plane that was already set. |