/**
* @brief Set the client(relative to the TDM) target buffer
- * @details Sets the buffer which will receive the hwc of client composition.
- * Window marked as TDM_COMPOSITION_CLIENT or TDM_COMPOSITION_DEVICE_CANDIDATE
- * will be composited into this buffer prior to the call to hwc_commit(),
- * and windows not marked as TDM_COMPOSITION_CLIENT and
- * TDM_COMPOSITION_DEVICE_CANDIDATE should be composited with this buffer by the
- * device.
- *
- * The buffer handle provided may be null if no windows are being composited by
- * the client. This must not result in an error (unless an invalid display
- * handle is also provided).
- *
- * The damage parameter describes a buffer damage region as defined in the
- * description of hwc_window_set_buffer_damage().
- *
- * Will be called before hwc_commit() if any of the layers are marked as
- * TDM_COMPOSITION_CLIENT or TDM_COMPOSITION_DEVICE_CANDIDATE. If no layers are
- * so marked, then it is not necessary to call this function. It is not necessary
- * to call hwc_validate() after changing the target through this function.
+ * @details This function lets the backend know the target buffer.
+ * The target buffer contains the result of the gl composition with the
+ * tdm_hwc_windows which marked as TDM_COMPOSITION_CLIENT.
* @param[in] hwc A hwc object
- * @param[in] target The new target buffer
+ * @param[in] target_buffer The new target buffer
* @param[in] damage The buffer damage region
- * @param[in] composited_wnds The array of composited hwc_wnds
- * @param[in] num_wnds The size of #composited_wnds array
* @return #TDM_ERROR_NONE if success. Otherwise, error value.
* @since 2.0.0
*/
/**
* @brief Validate the hwc
- * @details Instructs the device to inspect all of the layer state and
+ * @details Instructs the backend to inspect all of the hw layer state and
* determine if there are any composition type changes necessary before
- * presenting the hwc. Permitted changes are described in the definition
- * of tdm_composition_t above.
+ * presenting the hwc.
* @param[in] hwc A hwc object
- * @param[out] num_types The number of composition type changes required by
- * the device; if greater than 0, the client must either set and validate new
- * types, or call hwc_accept_changes() to accept the changes returned by
- * hwc_get_changed_composition_types(); must be the same as the number of
- * changes returned by hwc_get_changed_composition_types (see the
- * declaration of that function for more information); pointer will be non-NULL
+ * @param[in] composited_wnds the hwc window list which is visible.
+ * @param[in] num_wnds the number of the visible windows in the composited_wnds
+ * @param[out] num_types The number of composition type changes
* @return #TDM_ERROR_NONE if success. Otherwise, error value.
+ * @remark
+ * The backend has to return the num_types when the assgined comopsite types of
+ * the tdm_hwc_windows in the composited_wnds. If the num_types is greater than
+ * 0, the cleint must get the changed composite types of the tdm_hwc_windows
+ * and change the comopsite types
* @since 2.0.0
*/
tdm_error (*hwc_validate)(tdm_hwc *hwc, tdm_hwc_window **composited_wnds,
/**
* @brief Get changed composition types
- * @details Retrieves the windows for which the device requires a different
- * composition type than had been set prior to the last call to hwc_validate().
+ * @details Retrieves the windows for which the backend requires a different
+ * composition types that had been set prior to the last call to tdm_hwc_validate().
* The client will either update its state with these types and call
- * hwc_accept_changes, or will set new types and attempt to validate the
- * display again.
- * layers and types may be NULL to retrieve the number of elements which
- * will be returned. The number of elements returned must be the same as the
- * value returned in num_types from the last call to hwc_validate().
+ * tdm_hwc_accept_changes, or will set new types and attempt to validate the
+ * display again. The number of elements returned must be the same as the
+ * value returned in num_types from the last call to tdm_hwc_validate().
* @param[in] hwc A hwc object
- * @param[out] num_elements If windows or types were NULL, the number of layers
- * and types which would have been returned; if both were non-NULL, the
- * number of elements returned in layers and types, which must not exceed
- * the value stored in num_elements prior to the call; pointer will be
- * non-NULL
+ * @param[out] num_elements the number of hwc_windows
* @param[out] windows An array of windows
- * @param[out] composition_types An array of composition types, each
- * corresponding to an element of windows
+ * @param[out] composition_types An array of composition types, each corresponding
+ * to an element of windows
* @return #TDM_ERROR_NONE if success. Otherwise, error value.
* @since 2.0.0
*/
tdm_hwc_window **hwc_window,
tdm_hwc_window_composition *composition_types);
/**
- * @brief Accepts the changes required by the device
- * @details Accepts the changes required by the device from the previous
- * hwc_validate() call (which may be queried using
- * hwc_get_chaged_composition_types()) and revalidates the display. This
- * function is equivalent to requesting the changed types from
- * hwc_get_chaged_composition_types(), setting those types on the
- * corresponding windows, and then calling hwc_validate again.
- * After this call it must be valid to present this display. Calling this after
- * hwc_validate() returns 0 changes must succeed with TDM_ERROR_NONE, but
- * should have no other effect.
+ * @brief Accepts the changes required by the backend
+ * @details Accepts the changes required by the backend from the previous
+ * tdm_hwc_validate() and tdm_hwc_get_chaged_composition_types().
* @param[in] hwc A hwc object
* @return #TDM_ERROR_NONE if success. Otherwise, error value.
* @since 2.0.0
tdm_error (*hwc_accept_changes)(tdm_hwc *hwc);
/**
- * @brief Commit changes for a output object
+ * @brief Commit changes for a hwc object
* @param[in] hwc A hwc object
* @param[in] sync 0: asynchronous, 1:synchronous
* @param[in] user_data The user data
* @see hwc_set_commit_handler, tdm_hwc_commit_handler
* @remark
* When this function is called, a backend module @b SHOULD apply the all
- * changes of the given output object to screen as well as the layer changes
- * of this output.
+ * changes of the given hwc object to screen as well as the layer changes
+ * of this hwc.
* If this function returns TDM_ERROR_NONE, a backend module @b SHOULD call
* a user commit handler with the user data of this function after all
- * changes of the given output object are applied.
+ * changes of the given hwc object are applied.
*/
tdm_error (*hwc_commit)(tdm_hwc *hwc, int sync, void *user_data);
void (*hwc_window_destroy)(tdm_hwc_window *hwc_window);
/**
- * @brief Get a buffer queue for the window object
+ * @brief Acquire a buffer queue for the window object
+ * @details These buffers are used to composite by hardware a client content in
+ * the nocomp mode.
* @param[in] hwc_window A window object
* @param[out] error #TDM_ERROR_NONE if success. Otherwise, error value.
* @return A buffer queue
/**
* @brief Sets the desired composition type of the given window.
- * @details During hwc_validate(), the device may request changes to
+ * @details During hwc_validate(), the backend may request changes to
* the composition types of any of the layers as described in the definition
* of tdm_hwc_window_composition_t above.
* @param[in] hwc_window A window object
/**
* @brief Set the information to a window object
- * @details The information will be applied when the hwc object
- * of a layer object is committed.
+ * @details The information will be applied when the hwc object is committed.
* @param[in] hwc_window A window object
* @param[in] info The geometry information
* @return #TDM_ERROR_NONE if success. Otherwise, error value.
* @details A TDM buffer will be applied when the hwc object
* of a layer object is committed.
* @param[in] hwc_window A window object
- * @param[in] buffer A TDM buffer
+ * @param[in] buffer A TBM buffer
* @return #TDM_ERROR_NONE if success. Otherwise, error value.
- *
- * Implementation should return #TDM_ERROR_BUSY if #hwc_window can't
- * be updated right now, this won't be interpreted like some critical
- * error.
*/
tdm_error (*hwc_window_set_buffer)(tdm_hwc_window *hwc_window,
tbm_surface_h buffer);
/**
* @brief Set the property which has a given id.
- * @param[in] hwc window A hwc window object
+ * @param[in] hwc_window A hwc window object
* @param[in] id The property id
- * @param[in] value The value
+ * @param[in] value The value of the propery id
* @return #TDM_ERROR_NONE if success. Otherwise, error value.
*/
tdm_error (*hwc_window_set_property)(tdm_hwc_window *hwc_window,
/**
* @brief Get the property which has a given id.
- * @param[in] hwc window A hwc window object
+ * @param[in] hwc_window A hwc window object
* @param[in] id The property id
- * @param[out] value The value
+ * @param[out] value The value of the propery id
* @return #TDM_ERROR_NONE if success. Otherwise, error value.
*/
tdm_error (*hwc_window_get_property)(tdm_hwc_window *hwc_window,
/**
* @brief Get the constraints of hwc_window
- * @param[in] hwc window A hwc window object
+ * @param[in] hwc_window A hwc window object
* @param[out] constraints The tdm_hwc_window_constraint types
* @return #TDM_ERROR_NONE if success. Otherwise, error value.
*/
projects / platform / core / uifw / libtdm.git / blobdiff