EGLBoolean eglUnbindWaylandDisplayWL(EGLDisplay dpy,
struct wl_display *display);
+ EGLBoolean eglQueryWaylandBufferWL(EGLDisplay dpy,
+ struct wl_buffer *buffer,
+ EGLint attribute, EGLint *value);
+
New Tokens
Accepted as <target> in eglCreateImageKHR
EGL_WAYLAND_BUFFER_WL 0x31D5
+ Accepted in the <attrib_list> parameter of eglCreateImageKHR:
+
+ EGL_WAYLAND_PLANE_WL 0x31D6
+
+
+ Accepted as a eglQueryWaylandBufferWL attribute:
+
+ EGL_WAYLAND_BUFFER_COMPONENTS_WL 0x31D7
+
+ Possible values for EGL_WAYLAND_BUFFER_COMPONENTS_WL:
+
+ EGL_WAYLAND_BUFFER_RGB_WL 0x31D8
+ EGL_WAYLAND_BUFFER_RGBA_WL 0x31D9
+ EGL_WAYLAND_BUFFER_Y_U_V_WL 0x31Da
+ EGL_WAYLAND_BUFFER_Y_UV_WL 0x31Db
+ EGL_WAYLAND_BUFFER_Y_XUXV_WL 0x31Dc
+
+
Additions to the EGL 1.4 Specification:
To bind a server side wl_display to an EGLDisplay, call
eglUnbindWaylandDisplayWL returns EGL_FALSE when there is no
wl_display bound to the EGLDisplay currently otherwise EGL_TRUE.
- Import a wl_buffer by calling eglCreateImageKHR with
- wl_buffer as EGLClientBuffer, EGL_WAYLAND_BUFFER_WL as the target,
- NULL context and an empty attribute_list.
+ A wl_buffer can have several planes, typically in case of planar
+ YUV formats. Depending on the exact YUV format in use, the
+ compositor will have to create one or more EGLImages for the
+ various planes. The eglQueryWaylandBufferWL function should be
+ used to first query the wl_buffer components using
+ EGL_WAYLAND_BUFFER_COMPONENTS_WL as the attribute. If the
+ wl_buffer object is not an EGL wl_buffer (wl_shm and other wayland
+ extensions can create wl_buffer objects), this query will return
+ EGL_FALSE. In that case the wl_buffer can not be used with EGL
+ and the compositor should have another way to get the buffer
+ contents.
+
+ If eglQueryWaylandBufferWL succeeds, the returned value will be
+ one of EGL_WAYLAND_BUFFER_RGB_WL, EGL_WAYLAND_BUFFER_RGBA_WL,
+ EGL_WAYLAND_BUFFER_Y_U_V_WL, EGL_WAYLAND_BUFFER_Y_UV_WL,
+ EGL_WAYLAND_BUFFER_Y_XUXV_WL. The value returned describes how
+ many EGLImages must be used, which components will be sampled from
+ each EGLImage and how they map to rgba components in the shader.
+ The naming conventions separates planes by _ and within each
+ plane, the order or R, G, B, A, Y, U, and V indicates how those
+ components map to the rgba value returned by the sampler. X
+ indicates that the corresponding component in the rgba value isn't
+ used.
+
+ RGB and RGBA buffer types:
+
+ EGL_WAYLAND_BUFFER_RGB_WL
+ One plane, samples RGB from the texture to rgb in the
+ shader. Alpha channel is not valid.
+
+ EGL_WAYLAND_BUFFER_RGBA_WL 0x31D9
+ One plane, samples RGBA from the texture to rgba in the
+ shader.
+
+ YUV buffer types:
+
+ EGL_WAYLAND_BUFFER_Y_U_V_WL 0x31Da
+ Three planes, samples Y from the first plane to r in
+ the shader, U from the second plane to r, and V from
+ the third plane to r.
+
+ EGL_WAYLAND_BUFFER_Y_UV_WL 0x31Db
+ Two planes, samples Y from the first plane to r in
+ the shader, U and V from the second plane to rg.
+
+ EGL_WAYLAND_BUFFER_Y_XUXV_WL 0x31Dc
+ Two planes, samples Y from the first plane to r in
+ the shader, U and V from the second plane to g and a.
+
+ After querying the wl_buffer layout, create EGLImages for the
+ planes by calling eglCreateImageKHR with wl_buffer as
+ EGLClientBuffer, EGL_WAYLAND_BUFFER_WL as the target, NULL
+ context. If no attributes are given, an EGLImage will be created
+ for the first plane. For multi-planar buffers, specify the plane
+ to create the EGLImage for by using the EGL_WAYLAND_PLANE_WL
+ attribute. The value of the attribute is the index of the plane,
+ as defined by the buffer format. Writing to an EGLImage created
+ from a wl_buffer in any way (such as glTexImage2D, binding the
+ EGLImage as a renderbuffer etc) will result in undefined behavior.
Issues
Version 1, March 1, 2011
Initial draft (Benjamin Franzke)
+ Version 2, July 5, 2012
+ Add EGL_WAYLAND_PLANE_WL attribute to allow creating an EGLImage
+ for different planes of planar buffer. (Kristian Høgsberg)
+ Version 3, July 10, 2012
+ Add eglQueryWaylandBufferWL and the various buffer
+ formats. (Kristian Høgsberg)
}
#ifdef HAVE_WAYLAND_PLATFORM
+
+/* This structure describes how a wl_buffer maps to one or more
+ * __DRIimages. A wl_drm_buffer stores the wl_drm format code and the
+ * offsets and strides of the planes in the buffer. This table maps a
+ * wl_drm format code to a description of the planes in the buffer
+ * that lets us create a __DRIimage for each of the planes. */
+
+static const struct wl_drm_format_descriptor {
+ uint32_t wl_format;
+ EGLint components;
+ int nplanes;
+ struct {
+ int buffer_index;
+ int width_shift;
+ int height_shift;
+ uint32_t dri_format;
+ int cpp;
+ } planes[3];
+} wl_drm_formats[] = {
+ { WL_DRM_FORMAT_ARGB8888, EGL_WAYLAND_BUFFER_RGBA_WL, 1,
+ { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 }, } },
+
+ { WL_DRM_FORMAT_XRGB8888, EGL_WAYLAND_BUFFER_RGB_WL, 1,
+ { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
+
+ { WL_DRM_FORMAT_YUV410, EGL_WAYLAND_BUFFER_Y_U_V_WL, 3,
+ { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
+
+ { WL_DRM_FORMAT_YUV411, EGL_WAYLAND_BUFFER_Y_U_V_WL, 3,
+ { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
+
+ { WL_DRM_FORMAT_YUV420, EGL_WAYLAND_BUFFER_Y_U_V_WL, 3,
+ { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
+
+ { WL_DRM_FORMAT_YUV422, EGL_WAYLAND_BUFFER_Y_U_V_WL, 3,
+ { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
+
+ { WL_DRM_FORMAT_YUV444, EGL_WAYLAND_BUFFER_Y_U_V_WL, 3,
+ { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
+
+ { WL_DRM_FORMAT_NV12, EGL_WAYLAND_BUFFER_Y_UV_WL, 2,
+ { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
+
+ { WL_DRM_FORMAT_NV16, EGL_WAYLAND_BUFFER_Y_UV_WL, 2,
+ { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
+ { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
+
+ /* For YUYV buffers, we set up two overlapping DRI images and treat
+ * them as planar buffers in the compositors. Plane 0 is GR88 and
+ * samples YU or YV pairs and places Y into the R component, while
+ * plane 1 is ARGB and samples YUYV clusters and places pairs and
+ * places U into the G component and V into A. This lets the
+ * texture sampler interpolate the Y components correctly when
+ * sampling from plane 0, and interpolate U and V correctly when
+ * sampling from plane 1. */
+ { WL_DRM_FORMAT_YUYV, EGL_WAYLAND_BUFFER_Y_XUXV_WL, 2,
+ { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
+ { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
+};
+
static _EGLImage *
dri2_create_image_wayland_wl_buffer(_EGLDisplay *disp, _EGLContext *ctx,
EGLClientBuffer _buffer,
const EGLint *attr_list)
{
- struct wl_buffer *buffer = (struct wl_buffer *) _buffer;
+ struct wl_drm_buffer *buffer = (struct wl_drm_buffer *) _buffer;
struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
- __DRIimage *dri_image, *source;
+ __DRIimage *dri_image;
+ _EGLImageAttribs attrs;
+ EGLint err;
+ uint32_t format;
+ int32_t offset, stride, plane, width, height;
+ int cpp, index;
+ const struct wl_drm_format_descriptor *f;
- if (!wayland_buffer_is_drm(buffer))
+ if (!wayland_buffer_is_drm(&buffer->buffer))
return NULL;
- source = wayland_drm_buffer_get_buffer(buffer);
- dri_image = dri2_dpy->image->dupImage(source, NULL);
+ err = _eglParseImageAttribList(&attrs, disp, attr_list);
+ plane = attrs.PlaneWL;
+ if (err != EGL_SUCCESS) {
+ _eglError(EGL_BAD_PARAMETER, "dri2_create_image_wayland_wl_buffer");
+ return NULL;
+ }
+
+ f = buffer->driver_format;
+ if (plane < 0 || plane >= f->nplanes) {
+ _eglError(EGL_BAD_PARAMETER,
+ "dri2_create_image_wayland_wl_buffer (plane out of bounds)");
+ return NULL;
+ }
+
+ width = buffer->buffer.width >> f->planes[plane].width_shift;
+ height = buffer->buffer.height >> f->planes[plane].height_shift;
+ format = f->planes[plane].dri_format;
+ cpp = f->planes[plane].cpp;
+ index = f->planes[plane].buffer_index;
+ offset = buffer->offset[index];
+ stride = buffer->stride[index];
+
+ dri_image = dri2_dpy->image->createSubImage(buffer->driver_buffer,
+ width, height, format,
+ offset, stride / cpp, NULL);
return dri2_create_image(disp, dri_image);
}
{
_EGLDisplay *disp = user_data;
struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+ int i;
- switch (buffer->format) {
- case WL_DRM_FORMAT_ARGB8888:
- buffer->driver_format =__DRI_IMAGE_FORMAT_ARGB8888;
- break;
- case WL_DRM_FORMAT_XRGB8888:
- buffer->driver_format = __DRI_IMAGE_FORMAT_XRGB8888;
- break;
- default:
+ for (i = 0; i < ARRAY_SIZE(wl_drm_formats); i++)
+ if (wl_drm_formats[i].wl_format == buffer->format) {
+ buffer->driver_format = &wl_drm_formats[i];
+ break;
+ }
+
+ if (buffer->driver_format == NULL)
return;
- }
buffer->driver_buffer =
dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
buffer->buffer.width,
buffer->buffer.height,
- buffer->driver_format, name,
+ __DRI_IMAGE_FORMAT_NONE, name,
buffer->stride[0] / 4,
NULL);
}
return EGL_TRUE;
}
+
+static EGLBoolean
+dri2_query_wayland_buffer_wl(_EGLDriver *drv, _EGLDisplay *disp,
+ struct wl_buffer *_buffer,
+ EGLint attribute, EGLint *value)
+{
+ struct wl_drm_buffer *buffer = (struct wl_drm_buffer *) _buffer;
+ const struct wl_drm_format_descriptor *format;
+
+ if (!wayland_buffer_is_drm(&buffer->buffer))
+ return EGL_FALSE;
+
+ format = buffer->driver_format;
+ if (attribute == EGL_WAYLAND_BUFFER_COMPONENTS_WL) {
+ *value = format->components;
+ return EGL_TRUE;
+ }
+
+ return EGL_FALSE;
+}
#endif
static void
#ifdef HAVE_WAYLAND_PLATFORM
dri2_drv->base.API.BindWaylandDisplayWL = dri2_bind_wayland_display_wl;
dri2_drv->base.API.UnbindWaylandDisplayWL = dri2_unbind_wayland_display_wl;
+ dri2_drv->base.API.QueryWaylandBufferWL = dri2_query_wayland_buffer_wl;
#endif
dri2_drv->base.Name = "DRI2";
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