CN115809047B - Wayland synthesizer - Google Patents
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- CN115809047B CN115809047B CN202310050849.9A CN202310050849A CN115809047B CN 115809047 B CN115809047 B CN 115809047B CN 202310050849 A CN202310050849 A CN 202310050849A CN 115809047 B CN115809047 B CN 115809047B
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Abstract
The Wayland synthesizer comprises a graph synthesis module and a special effect realization module, wherein the graph synthesis module comprises a special effect framework, and the synthesizer realizes a graph synthesis function in the process of synthesizing the display frame through the cooperation of the special effect realization module and the special effect framework in the graph synthesis module; a set of special effect abstract function interfaces are defined in the special effect framework, and seven means capable of intervening in graph synthesis to realize corresponding special effects are provided in the special effect abstract function interfaces. According to the invention, the window converter is directly applied to the window node according to the tree structure of the Wayland synthesizer window to realize the adjustment of rendering of a single window, and the special effect framework and the Wayland synthesizer realized by the invention use the same set of standard interfaces of graphics, so that the effect is obvious, the expandability is better, and the operation under three rendering back ends of pixman, openGL ES and Vulkan is supported.
Description
Technical Field
The invention relates to the technical field of window synthesis rendering, in particular to a Wayland synthesizer for realizing a special effect framework.
Background
Currently, the mainstream Wayland synthesizer in the world is Kwin, mutter and the like. The Kwin and the Mutter are developed into Wayland synthesizers from window managers under an X display system, the unused wlroots are realized, the graph synthesis and the special effects are all one-dimensional array management windows, and the graph standard interfaces are directly used, the data structures of the special effects and the graph synthesis are inconsistent with the tree structures of the Wayland synthesizers of the domestic operating system, and the realization of the synthesis process is quite different, so the realization of the special effect framework is quite different from the design of the invention.
The special effect framework designed by the invention is a method for changing the display content of the system synthesis output based on a new generation Wayland graphic display system in a function injection mode, so that different types of special effects can participate in the graphic synthesis process conveniently and deeply.
The Chinese patent (application number 201910878092.6, method, device and system for synthesizing graphics based on the Wayland protocol) discloses a method, device and system for synthesizing graphics based on the Wayland protocol, and the method for synthesizing graphics based on the Wayland protocol is applied to a graphics display synthesis end and comprises the following steps: acquiring a kernel input event, calculating a window focus according to the kernel input event, and sending the kernel input event to a graphic application client corresponding to the window focus through an input management channel; receiving a window management request sent by at least one graphic application client through a window management channel; receiving a graphic cache drawn by at least one graphic application client through a graphic management channel, and applying the window management request sent by at least one graphic application client to the graphic cache drawn by the at least one graphic application client to obtain a synthesized graphic window; the synthesized graphical window is output to at least one display device. The invention only realizes a simple Wayland synthesizer, does not relate to any special effect, and does not contain a special effect realization framework.
The implementation of the currently internationally known and mainstream Wayland synthesizer special effect framework is deeply bound with OpenGL ES, and a plurality of special effects cannot be used on equipment which does not support the OpenGL ES, and a new generation of graphics standard Vulkan is not supported. When a specific special effect is realized, a specific effect realization person needs to directly use a graphic standard interface, so that the development difficulty of the special effect is increased, and when the graphic standard interface used by the special effect is inconsistent with the graphic interface used by a synthesizer, the compatibility problem is easy to occur, so that the support of different graphic standard interfaces is not facilitated to be expanded.
Disclosure of Invention
In order to solve the defects existing in the prior art, the invention provides a Wayland synthesizer which comprises a graph synthesis module and a special effect realization module, wherein the graph synthesis module comprises a special effect framework, and the Wayland synthesizer realizes a graph synthesis function in the process of synthesizing a display frame through the cooperation of the special effect realization module and the special effect framework in the graph synthesis module;
the method comprises the steps that a set of special effect abstract function interfaces are defined in a special effect framework, seven means capable of intervening in graph synthesis to achieve corresponding special effects are provided in the special effect abstract function interfaces, a Wayland synthesizer calls one or more special effect abstract function interfaces required by the graph synthesis module from the set of special effect abstract function interfaces before synthesizing a final display frame, a window synthesized by the Wayland synthesizer is enabled to have corresponding special effects, and accordingly the output display frame is enabled to have corresponding special effects, and the corresponding special effects relate to special effects of the window or special effects of specified contents outside the window.
The special effect realization module realizes the access and operation of the window in the Wayland synthesizer by accessing and operating the window abstraction, and the realization special effect realization module can access window data only by relying on the special effect frame.
The special effect framework also comprises a structural body supporting special effect rendering of a single window, namely a window converter, wherein the window converter is simultaneously connected with the special effect realization module, when the window needs special effects, the window converter assigns values to abstractions of the window, when the single window performs the rendering, the special effect realization module firstly judges whether the corresponding window has special effects, and if so, the window is rendered by adopting data of the window converter.
The special effect frame is also provided with a special effect rendering interface, the special effect realizing module is indirectly connected with the rendering abstract interface through the special effect rendering interface, and the rendering abstract interface carries out unified interface encapsulation on different graphic standard interfaces and enables the graphic standard interfaces to be compatible with different versions of the same set of graphic standard interfaces through compatible design.
The implementation means capable of intervening in the graph synthesis to realize the corresponding special effect in the special effect abstract function interface relates to calculating the area coverage of the special effect through the first special effect abstract function interface in the special effect data preprocessing stage before the damage adjusting stage at the beginning of the graph synthesis flow.
The implementation means capable of intervening in the graph synthesis in order to realize the corresponding special effects in the special effect abstract function interface also relates to statistics of the damage range generated by all special effects after the special effect data preprocessing stage and before the graph synthesis binding buffer zone through the second special effect abstract function interface.
The implementation means capable of intervening in graph synthesis to realize the corresponding special effect in the special effect abstract function interface also relates to that a rendering part in the special effect implementation module performs background rendering before window cyclic rendering through the third special effect abstract function interface.
The implementation means capable of intervening in graph synthesis to realize the corresponding special effect in the special effect abstract function interface also relates to that a rendering part in the special effect implementation module replaces window cyclic rendering through the fourth special effect abstract function interface.
The implementation means capable of interfering with graphic synthesis in the special effect abstract function interface to realize corresponding special effects also relates to that the rendering part of the special effect realizing module realizes the special effect rendering in a single window through the fifth special effect abstract function interface.
The implementation means capable of interfering with the graph synthesis in the special effect abstract function interface to realize the corresponding special effect also relates to the special effect in the coverage stage realized through the sixth special effect abstract function interface and the special effect in the message transmission stage realized through the seventh special effect abstract function interface.
According to the invention, the window converter is directly applied to the window node according to the tree structure of the Wayland synthesizer window, so that the adjustment of single window synthesis is realized, the special effect framework and the Wayland synthesizer realized by the invention use the same set of graphic standard interfaces, the effect is obviously better in expandability, the maximization, the minimization and the realization of watermark special effect are verified, and the operation under three rendering back ends of pixman, openGL ES and Vulkan is supported.
Drawings
Fig. 1 is a diagram of the logic framework of the waiand synthesizer of the present invention.
Fig. 2 is a complete graphical synthesis flow diagram that can be implemented in accordance with the waiand synthesizer of the present invention.
FIG. 3 is a flow chart of single window effect rendering that can be implemented based on the Wayland synthesizer of the present invention.
Detailed Description
In order to further understand the technical scheme and beneficial effects of the present invention, the technical scheme and beneficial effects thereof will be described in detail with reference to the accompanying drawings.
Some technical terms related in the technical scheme of the invention are explained as follows:
special effects: the special effect refers to a window management function in the graphic display system, wherein the window management function can enhance operability and interactivity and promote user use experience, such as a maximized and minimized gradual change process, thumbnail display during application switching, a window hiding mode during window closing and the like.
Wayland: wayland is a communication protocol that specifies the manner in which a display service communicates with its clients, and a display service that uses this protocol is called a Wayland synthesizer. In a graphical display operating system with Linux as a kernel, a waiand synthesizer and an X display service belong to the same class of things and are used for replacing the old X display service.
wlroots: wlroots is a toolset of Wayland synthesizers. A complete waiand synthesizer can be implemented based on wlroots and it has designed a framework for waiand synthesizer, providing the necessary tools that can be combined into a framework for wlroots to implement a basic waiand synthesizer. At the same time, wlroots is also the most mature Wayland synthesizer framework at present, which provides renderer abstraction that can be used by synthesizer implementations to avoid directly writing OpenGL code.
Damage: damage is a region in the graphics display system in which a frame of a next displayed frame is changed from a previous frame of the displayed frame.
Fig. 1 is a diagram of a waiand synthesizer provided by the present invention, as shown in fig. 1, where a special effect framework is implemented, and a special effect abstract function is called and added in a synthesis flow to change a synthesis result through a special effect abstract function interface implemented in the special effect framework.
The special effect framework takes the special effect abstract function interface as a concrete implementation means, provides special effects of seven stages of intervening graph synthesis, and one special effect can be realized by realizing one or more special effect abstract function interfaces, so that one or more stages are adopted. The specific effects achieved in each of the seven stages will be described later in detail.
The modules related to the special effects when the Wayland synthesizer synthesizes the display frames comprise a graph synthesis module and a special effect realization module: in the process of the graphic composition by the graphic composition module, a graphic composition process intervention is realized by adding a special effect abstract function into the process, when the synthesizer starts to compose the display frame, the special effect abstract function in the special effect frame is used and operated by the graphic composition module so that the corresponding special effect can be realized in the subsequent rendering stage, then the special effect realization module adds the newly added graphic content of the special effect or modifies the graphic content of the synthesizer on the display frame by using the special effect rendering interface, and finally the realized special effect comprises the special effect of the window or the special effect of the appointed content outside the window, such as system watermark, cut-off animation of window switching and the like. When the special effect rendering interface is used, the special effect implementation module actually uses a rendering abstract interface in a synthesizer. Because the rendering abstract interface has carried out unified interface encapsulation on different graphic standard interfaces and can be compatible with different versions of the same set of graphic standard interfaces through compatible design, the same set of graphic standard interfaces are used by the synthesizer when each time is started, and therefore, the special effect realization module for rendering through the special effect rendering interface also has the same set of graphic standard interfaces used by the Wayland synthesizer, and the special effect realization module directly inherits the support of the Wayland synthesizer on the back end APIs of the graphics such as Vulkan and the like.
With continued reference to FIG. 1, the rendering abstraction interface belongs to and is designed around the compositor, so the rendering abstraction interface is initially in a close-coupled relationship with the compositor. However, the special effect rendering interface is designed to serve the special effect implementation module, decoupling between the special effect implementation module and the synthesizer needs to be completed, and abstractions of some synthesizer data objects, such as windows, buffers, etc., need to be added in the special effect framework for the decoupling. The rendering operation of the special effect does not need to directly depend on the interface and data of the synthesizer, and the rendering in the synthesizer can be controlled through the abstraction of the special effect rendering interface and data objects in the special effect framework. Therefore, the invention realizes the abstraction of a window in the special effect frame of the synthesizer, the abstraction of the window can be regarded as the proxy of the window object in the synthesizer, and the special effect realizing module is actually the window in the operation synthesizer when accessing and operating the abstract object of the window. Thus, window data can be accessed when the effect depends only on the effect framework.
With continued reference to fig. 1, a window converter is defined in the synthesizer of the present invention, which is a structure supporting special effect rendering of a single window, and acts on the window, and when the window needs special effects, the window converter assigns an abstract value to the window. When the special effect realizing module renders a single window node, whether the window has a special effect or not can be judged first, and if the window has the special effect, the window is rendered by adopting the data of the window converter.
The window converter contains data of the original position size of the window, and data of the multiple of the desired magnification, the rotation angle, the transparency of the window or the target position and the position size. Special effects of window transparency adjustment, maximization, minimization or other window gradual changes may be supported.
FIG. 2 is a complete graphics synthesis flow that can be implemented by the Wayland synthesizer according to the present invention, as shown in FIG. 2, among the seven intervening graphics synthesis phases implemented by the Wayland synthesizer according to the present invention via the special effect abstract function interface, the first phase is preprocessing, and this phase is at the beginning of the synthesis flow, and the normal window synthesis flow is not yet started; the second stage is a damage adjusting stage for adjusting the damage area of the special effect; the third stage is a background rendering stage, and the stage is before window synthesis begins after damage statistics is completed; the fourth stage is a substitute window cyclic rendering stage; the fifth stage is a single window special effect rendering stage; the sixth stage is a covering stage; the seventh phase is the messaging phase. In the seven phases, some are only used for intervening data processing, some are used for intervening the graphic rendering process, the intervention of graphic rendering is involved, and in the rendering phase, the special effect realization module uses the special effect rendering interface to complete relevant special effect rendering. The special effect abstract function interface is equivalent to an instruction to the special effect realizing module, and the window converter gives the special information related to the instruction to the special effect realizing module.
Continuing with the illustration of FIG. 2, seven phases involve seven special effects abstract function interfaces, each of which is described in detail below:
1. the first effect abstract function interface represents an effect data preprocessing stage, i.e. "effect data preprocessing" in fig. 2, which is at the very beginning of the synthesis flow, and precedes the damage adjustment stage. This stage is mainly to calculate the area coverage of the effect.
2. The second effect abstract function interface is a statistical stage representing the effect damage, which is invoked after preprocessing before binding the frame buffer.
This stage is mainly to count the damage ranges generated by all special effects, and the update area of the special effects needs to be added into damage, and then calculate the damage range of the whole output after binding the frame buffer (i.e. "binding frame buffer calculates the current whole output damage" in fig. 2). Subsequent display frames are updated according to this range.
3. The third special effect abstract function interface represents a background rendering stage, and accurately enables the subsequent special effect realization module to realize the special effect of the background rendering stage (the special effect abstract function interface is equivalent to an instruction for realizing a specific special effect for the special effect realization module), and supports the use of the special effect rendering interface.
This phase is before or instead of window loop rendering, where the display frame does not render new content compared to the previous frame before this phase is performed. The background rendering stage is to render one time before all windows are rendered, and can render the effect similar to the desktop background.
4. The fourth special effect abstract function interface replaces window cyclic rendering, and accurately enables a subsequent special effect realization module to realize special effects replacing window cyclic rendering, and supports the use of the special effect rendering interface.
This phase is that only one effect is in effect at a time after the background rendering phase and before the window loop rendering. If the special effect implements the special effect abstract function interface and is enabled, the window rendering of the special effect abstract function interface is not executed any more, and the synthesizer directly uses the implementation of the interface function to replace the window rendering of the special effect abstract function interface. That is, the following window loop rendering flow in fig. 2 will not be executed after invoking this special effect:
judging whether all windows are rendered, if yes, entering the next coverage stage; if not, judging whether the current window has the special effect, if so, performing single-window special effect rendering (corresponding to a fifth special effect abstract function interface as follows), if not, performing single-window rendering, and then judging whether all windows are rendered until all windows are rendered.
The realization of the special effect enables the original rendering to become unimportant and be shielded by the switched content, optimizes the CPU consumed during rendering, and can be used for special effects such as application switching, working area display and the like.
5. The fifth special effect abstract function interface represents a single window special effect rendering stage, and accurately enables a subsequent special effect realization module to realize single window special effect rendering, replaces single window rendering, can use data of a window converter to conduct customized rendering on a window, and supports the use of the special effect rendering interface. Besides special effects supported by the window converter, special effects, such as blurring during window movement, window closing, crushing and burning, and the like, related to a single window can be supported.
As shown in fig. 3, a single window special effect rendering flowchart that can be implemented by the waiand synthesizer according to the present invention is shown: when a single window is rendered, whether the client window has special effects or not is firstly judged, if the client window does not have special effects, the client window is rendered according to a normal flow (namely, the server window decoration rendering, the shadow rendering and the client window rendering are performed), and related data updating and interface calling are not needed. If the special effect exists, firstly calculating a window updating position, then updating the position of the window decoration of the server side and the position of the shadow according to the window updating position, rendering, and finally rendering the window position of the client side by using the data of the converter.
6. The sixth special effect abstract function interface represents an overlay stage, and after the window is rendered, the cursor is rendered before. Some content may be superimposed after all windows are rendered. A special effects rendering interface may be used.
The content is displayed in front of all windows, and the messages of the windows are not interfered, so that the realization of special effects such as system watermarks and the like can be supported.
7. The seventh special effect abstract function interface is representative of a messaging phase.
The method is generally used for informing a synthesizer of the region needing to be rendered next time, supporting animation realization during graph synthesis and prolonging the time of window action. When the compositor receives a new rendering region, the compositor will restart a new round of graphics compositing, and the 7 phases of the effect will be triggered again.
Compared with the prior art, the invention has the advantages that:
1. the invention directly applies the window converter to the node according to the tree structure of the synthesizer window, thereby realizing the adjustment of single window rendering and simultaneously using the same set of graphic standard interface with graphic synthesis.
2. The realization effect is obvious, the expandability is better, the maximization, the minimization and the realization of the watermark special effect are verified, and the operation under three rendering back ends of pixman, openGL ES and Vulkan is supported.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that the present invention is not limited to the above embodiments, and that various changes and modifications can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A waiand synthesizer, characterized by: the system comprises a graph synthesis module and a special effect realization module, wherein the graph synthesis module comprises a special effect frame, and a Wayland synthesizer realizes a graph synthesis function in the process of synthesizing a display frame through the cooperation of the special effect frame in the special effect realization module and the graph synthesis module;
the method comprises the steps that a set of special effect abstract function interfaces are defined in a special effect frame, seven means capable of intervening in graphic synthesis to achieve corresponding special effects are provided in the special effect abstract function interfaces, a Wayland synthesizer calls one or more special effect abstract function interfaces required by the graphic synthesis module from the set of special effect abstract function interfaces before synthesizing a final display frame, a window synthesized by the Wayland synthesizer is enabled to have corresponding special effects, and accordingly the output display frame is enabled to have corresponding special effects, and the corresponding special effects relate to special effects of the window or special effects of specified contents outside the window;
the special effect frame is also provided with window abstraction which is used as a proxy of a window object in the Wayland synthesizer, and the special effect realization module realizes the access and operation of the window in the Wayland synthesizer by accessing and operating the window abstraction, so that the special effect realization module can access window data only by relying on the special effect frame;
the special effect framework further comprises a window converter which is used as a structural body for supporting special effect rendering of a single window, the window converter is simultaneously connected with the special effect realization module, when the window needs special effects, the window converter is assigned to the abstraction of the window, when the single window is rendered, the special effect realization module firstly judges whether the corresponding window has special effects, and if so, the window is rendered by adopting the data of the window converter; the window converter contains data of original position size data of the window, and data of multiple of the desired magnification, rotation angle, window transparency or target position and position size;
the special effect frame is also provided with a special effect rendering interface, the special effect realizing module is indirectly connected with the rendering abstract interface through the special effect rendering interface, and the rendering abstract interface performs unified interface encapsulation on different graphic standard interfaces and enables the graphic standard interfaces to be compatible with different versions of the same set of graphic standard interfaces through compatible design.
2. The waiand synthesizer of claim 1, wherein: the implementation means capable of intervening in graph synthesis in the special effect abstract function interface to realize corresponding special effects relates to calculating the area coverage of the special effects through a special effect data preprocessing stage before a damage adjusting stage at the beginning of a graph synthesis flow through the first special effect abstract function interface.
3. The waiand synthesizer of claim 2, wherein: the implementation means of the special effect abstract function interface capable of interfering with the graph synthesis to realize the corresponding special effect also relates to statistics of the damage range generated by all special effects after the special effect data preprocessing stage and before the graph synthesis binding buffer zone through the second special effect abstract function interface.
4. A waiand synthesizer as claimed in claim 3, wherein: the implementation means capable of intervening in graph synthesis to realize the corresponding special effect in the special effect abstract function interface also relates to that the rendering part in the special effect implementation module performs background rendering before window cyclic rendering through the third special effect abstract function interface.
5. The waiand synthesizer of claim 4, wherein: the implementation means capable of intervening in graph synthesis to realize the corresponding special effects in the special effect abstract function interface also relates to that a rendering part in the special effect implementation module replaces window cyclic rendering through the fourth special effect abstract function interface.
6. The waiand synthesizer of claim 5, wherein: the implementation means in the special effect abstract function interface that can interfere with the graphics synthesis to implement the corresponding special effect also involves rendering the rendering portion of the special effect implementation module with a single window special effect through the fifth special effect abstract function interface.
7. The waiand synthesizer of claim 6, wherein: the implementation means capable of intervening in graph synthesis to realize corresponding special effects in the special effect abstract function interface also relates to realizing special effects in the coverage stage through the sixth special effect abstract function interface and realizing special effects in the message transmission stage through the seventh special effect abstract function interface.
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