55 lines
2.9 KiB
Text
55 lines
2.9 KiB
Text
Towards Integration
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===================
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:date: Spring 2023
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:author: Ichthyostega
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//Menu: label Integration
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The Lumiera project creates innovative software, geared towards professional, high-quality work;
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it aims at high flexibility, offering user-control over a broad spectrum of configurable parameters,
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and with smooth workflows that scale well to larger and more intricate projects. Building such
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software involves some degree of exploration and search for adequate methods to reconcile
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conflicting goals. There is no ready-made blueprint that just needs implementation -- rather,
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we have to resort to a sequence of integration efforts, aimed at establishing core tenets
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of the envisioned architecture.
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Vertical Slices
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---------------
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TIP: A »https://en.wikipedia.org/wiki/Vertical_slice[vertical slice]« is an integration effort
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that engages all major software components of a software system. It is defined and used as
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a tool to further and focus the development activity towards large scale integration goals.
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Populate the Timeline in the UI
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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✔ link:https://issues.lumiera.org/ticket/1014[#1014 »TimelinePopulation«]: +
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Send a description of the model structure in the form of a _population diff_ from the Session
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in Steam-Layer up through the UI-Bus. When received in the UI-Layer, a new Timeline tab will be
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allocated and populated with appropriate widgets to create a GUI-Timeline-View. The generated
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UI structures will feature several nested tracks and some placeholder clips, which can be
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dragged with the mouse. Moreover, the nested track structure is visualised by _custom drawing_
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onto a _canvas widget,_ and the actual colours and shades for this drawing operations will be
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picked up from the current desktop theme, in combination with an CSS application stylesheet.
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Commands and State Messages via UI-Bus
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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✔ link:https://issues.lumiera.org/ticket/1099[#1014 »Demo GUI Roundtrip«]: +
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Set up a test dialog in the UI, which issues test/dummy commands. These are propagated
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to a dispatcher in Steam-Layer and by special rigging reflected back as _State Mark Messages_
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over the UI-Bus, causing a visible state change in the _Error Log View_ in the UI.
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Play a clip
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~~~~~~~~~~~
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🗘 link:https://issues.lumiera.org/ticket/1221[#1221 »PlaybackVerticalSlice«]: +
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This vertical slice drives integration of Playback and Rendering.
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While the actual media content is still mocked and hard wired, we get a simple playback control
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in the GUI connected to some suitable display of video. When activated, an existing _ViewConnection_
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is used to initiate a _Play Process_; the _Fixture_ data structure established between high-level-Model
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(Session) and low-level-Model (Render nodes) will back a _Frame Dispatcher_ to generate _Render Jobs,_
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which are then digested and activated by the _Scheduler_ in the Vault-Layer, thereby
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_operating the render nodes_ to generate video data for display.
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