CN114995944B - Resolution self-adaptive zooming display method and display card driving module - Google Patents
Resolution self-adaptive zooming display method and display card driving module Download PDFInfo
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- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
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Abstract
The invention is suitable for the field of display card driving, and provides a resolution self-adaptive zooming display method and a display card driving module, wherein EDID is firstly analyzed, and if no EDID exists, default VESA time sequence output is used; if the system BIOS uses the resolution according with the EDID, the resolution and the corresponding time sequence are used for displaying, otherwise, the maximum resolution of the display is selected as the target resolution, and then the zoom display is performed through the zoom operation by calculating the zoom parameters. The invention can automatically match the resolution of the BIOS and the display, and the resolution and the output time sequence are set by analyzing the EDID of the display, so the self-adaptive capacity is strong; the zooming adopts a linear zooming method of centering alignment local zooming, so that the operation time is shortened, and the display speed is improved; even when no EDID exists, the display function under the complex combination of the BIOS and the display of each system can be successfully realized according to VESA standard resolution and time sequence output.
Description
Technical Field
The invention belongs to the technical field of display card driving, and particularly relates to a resolution self-adaptive zooming display method and a display card driving module.
Background
With the rapid development of a GPU (graphics processing unit, graphics processor abbreviation), the driving development of the GPU under various environments is particularly important. In a Basic Input Output System (BIOS) stage, display data is first transferred to a display card by calling a display card drive interface by a System BIOS, then rendered by the display card and transferred to a display, and finally the display is processed by its own policy and displayed on a screen. The display card driver is located in the middle of the display data stream, and needs to coordinate the display settings of the system BIOS and the display, including the display resolution and timing.
The most basic mode is that a system BIOS manufacturer and a display card manufacturer jointly research an instruction manual of a display, the system BIOS and the display card driver are set to be the optimal resolution supported by the display, and a corresponding control register of the display card is set according to the time sequence description of the optimal resolution of the instruction manual of the display, so that an output interface of the display card is output to the display according to the corresponding time sequence. This approach requires that both the system BIOS side and the graphics card driver side study the display usage manual, and that each firmware package is custom made and not usable for displays of other resolutions or timing.
The video card driver also reads Extended Display Identification Data (EDID) of the display, analyzes all display resolutions and time sequences supported by the display from the EDID, transmits the resolution to the system BIOS, selects the best resolution from the received resolutions, and configures the corresponding output control register according to the time sequence described by the EDID, so that the time sequence output to the display conforms to the EDID description. The method has certain self-adaptive capacity, but the method cannot normally display when the system BIOS does not support the resolution in the EDID of the display.
Disclosure of Invention
In view of the foregoing problems, an object of the present invention is to provide a resolution adaptive scaling display method and a display card driving module, which are used to solve the technical problem that the BIOS and the display of various systems cannot be adaptively unified.
The invention adopts the following technical scheme:
in one aspect, the resolution adaptive zoom display method includes the steps of:
s1, reading the EDID of the display, outputting by using a default VESA time sequence if no valid EDID exists, otherwise, analyzing the EDID, acquiring all resolutions and time sequences supported by the display, and transmitting to a system BIOS;
s2, if the system BIOS uses the resolution consistent with the received resolution, the resolution and the corresponding time sequence are used for the output display of the display;
s3, if the system BIOS uses the resolution which is not in accordance with the received resolution, selecting the maximum resolution and the corresponding time sequence which are supported by the display card and the display as the target resolution of zooming;
and S4, calculating scaling parameters, scaling the data in the source data storage space to the target data storage space by using a preset scaling mode, and writing the updated data in the target data storage space into a corresponding position of the video memory for displaying.
Further, in step S3, the maximum resolution supported by both the display card and the display and the corresponding time sequence are selected as the target resolution of scaling, and the specific process is as follows:
s31, according to the resolution used by the system BIOS, the source resolution of the self-adaptive scaling is used;
s32, according to the maximum resolution supported by the display card and the display and the corresponding time sequence, taking the maximum resolution and the corresponding time sequence as target resolution of self-adaptive scaling;
and S33, calculating a scaling parameter according to the source resolution and the target resolution.
Further, the specific process of step S4 is as follows:
s41, establishing a source data storage space and a target data storage space, wherein the source data storage space is used for recording display data of a system BIOS, and the target data storage space is used for recording the zoomed display data;
s42, acquiring the initial address and the size of the specified updating range of the source data storage space according to the display requirement of the BIOS of the system, and determining the zooming range of the source data;
s43, correspondingly converting the scaling parameters into the initial address and the size of the target data storage space to be updated according to the calculated scaling parameters, and determining the update range of the target data;
s44, determining data corresponding to the source data scaling range in the source data storage space according to the current display mode of the system BIOS;
s45, updating data in the source data scaling range to a target data updating range of a target data storage space by using a linear scaling mode of centered alignment local scaling;
and S46, writing the data in the target data updating range into the corresponding position of the video memory for displaying.
Further, in step S45, the start address of the target data update range is reduced by one scaling unit, and the size is increased by two scaling units and then updated.
In another aspect, the graphics card driving module includes:
the data acquisition unit is used for reading the EDID of the display, outputting the EDID by using a default VESA time sequence if no effective EDID exists, and otherwise, analyzing the EDID, acquiring all resolutions and time sequences supported by the display and transmitting the resolution and time sequences to a system BIOS;
the output display unit is used for performing display output display by using the resolution and the corresponding time sequence when the system BIOS uses the resolution which is consistent with the received resolution;
the target selection unit is used for selecting the maximum resolution supported by the display card and the display and the corresponding time sequence as the target resolution of zooming when the system BIOS uses the resolution which is not in accordance with the received resolution;
and the zooming display unit is used for calculating zooming parameters, zooming the data in the source data storage space to the target data storage space by using a preset zooming mode, and writing the updated data in the target data storage space into a corresponding position of the video memory for displaying.
Further, the target selecting unit specifically includes:
the source resolution setting module is used for taking the resolution used by the system BIOS as the source resolution of the self-adaptive scaling;
the target resolution setting module is used for taking the maximum resolution supported by the display card and the display and the corresponding time sequence as the target resolution of the self-adaptive scaling;
and the scaling parameter calculation module is used for calculating scaling parameters according to the source resolution and the target resolution.
Further, the zoom display unit specifically includes:
the device comprises a storage space establishing module, a display data processing module and a display data processing module, wherein the storage space establishing module is used for establishing a source data storage space and a target data storage space, the source data storage space is used for recording display data of a system BIOS, and the target data storage space is used for recording zoomed display data;
the scaling range determining module is used for acquiring the initial address and the size of the specified updating range of the source data storage space according to the display requirement of the system BIOS and determining the scaling range of the source data;
the updating range determining module is used for correspondingly converting the scaling parameters into the initial address and the size of the target data storage space to be updated according to the calculated scaling parameters and determining the updating range of the target data;
the source data determining module is used for determining data corresponding to a source data scaling range in a source data storage space according to the current display mode of the system BIOS;
the target data scaling module is used for updating data in the source data scaling range to a target data updating range of a target data storage space by using a linear scaling mode of centered alignment local scaling;
and the data display module is used for writing the data in the target data updating range into the corresponding position of the video memory for displaying.
Furthermore, in the target data scaling module, the initial address of the target data updating range is reduced by one scaling unit, and the size of the target data updating range is increased by two scaling units and then the target data is updated.
The invention has the beneficial effects that: the technical scheme of the invention can automatically match the resolutions of the system BIOS and the display, and the resolution and the output time sequence are set by analyzing the EDID of the display, so that the self-adaptive capacity is strong; the zooming adopts a linear zooming method of centering alignment local zooming, so that the operation time is shortened, and the display speed is improved; even when no EDID exists, the display function under the complex combination of the BIOS and the display of each system can be successfully realized according to VESA standard resolution and time sequence output.
Drawings
FIG. 1 is a flowchart illustrating a method for displaying a resolution adaptive zoom image according to a first embodiment of the present invention;
fig. 2 is a block diagram of a display card driver module according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to illustrate the technical means of the present invention, the following description is given by way of specific examples.
The first embodiment is as follows:
fig. 1 illustrates a flow of a resolution adaptive zoom display method provided by an embodiment of the present invention, and only a part related to the embodiment of the present invention is shown for convenience of description.
As shown in fig. 1, the resolution adaptive scaling display method provided in this embodiment includes the following steps:
and S1, reading the EDID of the display, outputting by using a default VESA time sequence if no valid EDID exists, otherwise, analyzing the EDID, acquiring all resolutions and time sequences supported by the display, and transmitting to a system BIOS.
In UEFI (Unified Extensible Firmware Interface) definition, the system BIOS on the motherboard can call the graphics card driver through an Interface module between the system BIOS and the graphics card driver. The system BIOS can be BIOS firmware of various BIOS suppliers under UEFI; the display card drive is a domestic GPU display drive, and the display is most of displays on the market.
The VESA (Video Electronics Standards Association) standard specifies display monitor timing Standards for various resolutions and refresh frequencies of computer systems.
Under UEFI, after a display requirement of a system BIOS is received, the display requirement comprises a display mode, data needing to be updated, resolution and the like, the system BIOS reads the EDID of the current display by calling a display card drive, and if the valid EDID cannot be read, the EDID can be output only through default preset VESA standard resolution and time sequence. And if the valid EDID of the display is successfully read, analyzing the EDID and transmitting all resolution ratios and time sequences supported by the display to the system BIOS.
And S2, if the system BIOS uses the resolution consistent with the received resolution, the system BIOS uses the resolution and the corresponding time sequence to output and display the display.
If the resolution in the display requirement of the system BIOS has the corresponding resolution in the received resolution, the corresponding resolution and the corresponding time sequence are directly used for output display.
And S3, if the system BIOS uses the resolution which is not in accordance with the received resolution, selecting the maximum resolution and the corresponding time sequence which are supported by the display card and the display as the target resolution of scaling.
And if the resolution in the display requirement of the system BIOS does not have the consistent resolution in the received resolution, zooming and displaying according to the resolution and the time sequence obtained by analyzing the EDID. In order to enhance the display effect, the maximum resolution supported by both the display card and the display can be selected as the target resolution for the scaling processing.
The specific process is as follows:
s31, taking the resolution used by the BIOS of the system as the source resolution of the self-adaptive scaling;
s32, according to the maximum resolution supported by the display card and the display and the corresponding time sequence, taking the maximum resolution as the target resolution of the self-adaptive scaling;
and S33, calculating scaling parameters according to the source resolution and the target resolution.
The source resolution is the resolution to be used by the system BIOS, the target resolution is the maximum resolution supported by both the display card and the display, the target resolution generally selects the optimal resolution of the display, the display effect is good, and then the scaling parameter is calculated to realize the scaling from the source resolution to the target resolution. The scaling parameters include a lateral scaling and a vertical scaling. For example, scaling a resolution of 600X480 to 1920X1080, the scaling parameters are (3.200, 2.250).
And S4, calculating scaling parameters, scaling the data in the source data storage space to the target data storage space by using a preset scaling mode, and writing the updated data in the target data storage space into a corresponding position of the video memory for displaying.
In the step, the data of the source data storage space is zoomed to the target data storage space according to the set zooming mode, and finally, the updating display is carried out. The specific process is as follows:
s41, establishing a source data storage space and a target data storage space, wherein the source data storage space is used for recording display data of a system BIOS, and the target data storage space is used for recording the zoomed display data;
s42, acquiring the initial address and the size of the specified updating range of the source data storage space according to the display requirement of the BIOS of the system, and determining the zooming range of the source data;
s43, correspondingly converting the scaling parameters into the initial address and the size of the target data storage space to be updated according to the calculated scaling parameters, and determining the update range of the target data;
s44, determining data corresponding to a source data scaling range in a source data storage space according to the current display mode of the system BIOS;
s45, updating data in the source data scaling range to a target data updating range of a target data storage space by using a linear scaling mode of centered alignment local scaling;
and S46, writing the data in the target data updating range into the corresponding position of the video memory for displaying.
As described above, the display requirements of the system BIOS include display mode, data to be updated, resolution, etc. The display data of the system BIOS is stored in the source data storage space, and the data needing to be updated by the current system BIOS has a specified updating range in the source data storage space, including a starting address and a size, so that the source data scaling range can be determined through the starting address and the size. And according to the obtained scaling parameters, the initial address and the size of the corresponding target scaling in the target data storage space can be converted to obtain the target data updating range. And finally, zooming and updating the data in the source data zooming range to the target data updating range according to the display mode requirement and the set zooming mode.
As a preferred embodiment, in step S45, in order to further prevent omission or aliasing, the start address of the target data update range may be further reduced by one scaling unit, and the size of the start address may be increased by two scaling units and then written into the corresponding location of the video memory.
The specific steps of converting the source data updating space data into the target data storage space are as follows:
1. a translated start address comprising a horizontal target address and a vertical target address, wherein the horizontal target address = 8970, (horizontal source address-1) = horizontal scaling parameter 8971, (vertical source address-1) = vertical scaling parameter 8971; the horizontal source address and the vertical source address are the initial addresses of the data to be updated in the source data storage space;
2. a transformed data size range comprising a landscape range and a portrait range, wherein landscape range =8968, (landscape source range + 2) = landscape scaling parameter 8969; (portrait range + 2) = portrait scaling parameter 8968; (portrait source range + 2): portrait scaling parameter 8969; here, the horizontal source range and the vertical source range are the size ranges of the data to be updated in the source data storage space.
Here, the symbol indicates rounding down, 896889699, and the symbol indicates rounding up.
In the step, the source data is displayed in a zooming way according to blocks, the initial address and the size of each block are determined, and then the initial address and the size of the target are calculated according to the zooming parameters. For example, if the resolution of 600X480 is scaled to 1920X1080, the scaling parameter is (3.200, 2.250), and if the starting coordinate of the updated region is (300, 240), and the updating range is (100, 10), the corresponding updated target region is the region with the starting size of (956, 537) (327, 27).
The invention adopts a linear scaling mode of centering alignment local scaling, the scaling mode is a bilinear interpolation method of central point alignment, the scaling speed is high, the image display has no gear and vertical line, and the display effect is good.
UEFI has four display modes such as pixel fill, draw screen, screen-to-screen, buffer-to-screen. The four display modes have corresponding data display contents and requirements, for example, pixel filling is to fill pixel information into a source data storage space first. And according to the current display mode, the data to be updated and displayed by the BIOS of the system is stored in the corresponding position of the target data storage space for subsequent zooming processing.
And writing the data in the target data updating range into the corresponding position of the video memory, setting an output time sequence, and finally displaying on the display.
The embodiment of the invention discloses a resolution self-adaptive scaling method based on a UEFI interface, which is used for improving the display success rate of a display card under the complex combination condition of multiple systems BIOS and multiple displays. The scaling method used in this embodiment establishes two data spaces (a source data storage space and a target data storage space), where the source data storage space is used to store data that the system BIOS wants to display; the target data storage space is used for storing the zoomed display data. The scaling method used by the embodiment of the invention is a linear scaling method with the central points of the original image and the target image aligned and the local part pulled up, which can not only solve the problem that the display cannot be carried out due to the mismatching of the system BIOS and the display, but also avoid the problems of large delay and incomplete image local updating and splicing of the common scaling method.
Example two:
fig. 2 illustrates a structure of a graphics card driving module according to an embodiment of the present invention, and only a portion related to the embodiment of the present invention is illustrated for convenience of description.
As shown in fig. 2, the display card driving module provided in this embodiment includes:
the data acquisition unit 1 is used for reading the EDID of the display, outputting the EDID by using a default VESA time sequence if the EDID is not valid, otherwise, analyzing the EDID, acquiring all resolutions and time sequences supported by the display, and transmitting the resolution and time sequences to a system BIOS;
an output display unit 2 for performing display output display using the resolution and the corresponding timing when the system BIOS uses the resolution corresponding to the received resolution;
a target selection unit 3, configured to select, when the system BIOS uses a resolution that does not conform to the received resolution, a maximum resolution and a corresponding timing that are supported by both the graphics card and the display as a target resolution for scaling;
and the zooming display unit 4 is used for calculating zooming parameters, zooming the data in the source data storage space to the target data storage space by using a preset zooming mode, and writing the updated data in the target data storage space into a corresponding position of the video memory for displaying.
The display card driving module provided in this embodiment correspondingly implements steps S1 to S4 in the first embodiment, specifically, first, the data obtaining unit reads and analyzes the EDID of the display, if there is no EDID, a default VESA timing sequence is used for output, and if there is EDID, all resolutions and timing sequences supported by the display are obtained; then if the system BIOS uses the resolution consistent with the resolution received by the display card driver, the output display unit directly uses the resolution and the corresponding time sequence to carry out display output display; if not, the target selection unit determines the maximum resolution supported by both the video card and the display as the target resolution. And finally, calculating scaling parameters according to the source resolution and the target resolution used by the BIOS of the scaling display unit, carrying out data scaling processing according to a preset scaling mode, and finally displaying.
Wherein, the target selection unit specifically comprises:
the source resolution setting module is used for taking the resolution used by the system BIOS as the source resolution of the self-adaptive scaling;
the target resolution setting module is used for taking the maximum resolution supported by the display card and the display and the corresponding time sequence as the target resolution of the self-adaptive scaling;
and the scaling parameter calculation module is used for calculating scaling parameters according to the source resolution and the target resolution.
Wherein, the zooming display unit specifically comprises:
the device comprises a storage space establishing module, a display data processing module and a display data processing module, wherein the storage space establishing module is used for establishing a source data storage space and a target data storage space, the source data storage space is used for recording display data of a system BIOS, and the target data storage space is used for recording the zoomed display data;
the scaling range determining module is used for acquiring the initial address and the size of the specified updating range of the source data storage space according to the display requirement of the system BIOS and determining the scaling range of the source data;
the updating range determining module is used for correspondingly converting the scaling parameters into the initial address and the size of the target data storage space to be updated according to the calculated scaling parameters and determining the updating range of the target data;
the source data determining module is used for determining data corresponding to a source data scaling range in a source data storage space according to the current display mode of the system BIOS;
the target data scaling module is used for updating data in a source data scaling range to a target data updating range of a target data storage space by using a linear scaling mode of centered alignment local scaling;
and the data display module is used for writing the data in the target data updating range into the corresponding position of the video memory for displaying.
The embodiment of the invention discloses a display card driving module which is used for improving the display success rate of a display card under the complex combination condition of a plurality of systems BIOS and a plurality of displays, eliminating the dependence of the systems BIOS on the resolution of the displays by a self-adaptive scaling method, enabling the systems BIOS to use any resolution supported by the display card, and enabling the display card driver to be responsible for outputting display data to the displays after being original or scaled; the display card drives the firstly analyzed display EDID to obtain the optimal resolution and time sequence information, if the EDID is not read, the preset VESA standard resolution and time sequence are used for outputting, and if the EDID is read, the display card displays the EDID in a scaling mode according to the resolution and the time sequence obtained by analyzing the EDID.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. A method for resolution adaptive zoom display, said method comprising the steps of:
s1, reading the EDID of the display, outputting by using a default VESA time sequence if no valid EDID exists, otherwise, analyzing the EDID, acquiring all resolutions and time sequences supported by the display, and transmitting to a system BIOS;
s2, if the system BIOS uses the resolution consistent with the received resolution, the resolution and the corresponding time sequence are used for the output display of the display;
s3, if the system BIOS uses the resolution which is not in accordance with the received resolution, selecting the maximum resolution and the corresponding time sequence which are supported by the display card and the display as the target resolution of zooming;
s4, calculating scaling parameters, scaling the data in the source data storage space to a target data storage space by using a preset scaling mode, and writing the updated data in the target data storage space into a corresponding position of the video memory for displaying;
in step S3, the maximum resolution supported by both the graphics card and the display and the corresponding time sequence are selected as the target resolution of scaling, and the specific process is as follows:
s31, taking the resolution used by the BIOS of the system as the source resolution of the self-adaptive scaling;
s32, according to the maximum resolution supported by the display card and the display and the corresponding time sequence, taking the maximum resolution as the target resolution of the self-adaptive scaling;
s33, calculating scaling parameters according to the source resolution and the target resolution;
the specific process of the step S4 is as follows:
s41, establishing a source data storage space and a target data storage space, wherein the source data storage space is used for recording display data of a system BIOS, and the target data storage space is used for recording the zoomed display data;
s42, acquiring the initial address and the size of the specified updating range of the source data storage space according to the display requirement of the system BIOS, and determining the source data scaling range;
s43, correspondingly converting the scaling parameters into the initial address and the size of the target data storage space to be updated according to the calculated scaling parameters, and determining the update range of the target data;
s44, determining data corresponding to the source data scaling range in the source data storage space according to the current display mode of the system BIOS;
s45, updating the data in the source data scaling range to a target data updating range of a target data storage space by using a linear scaling mode of centered alignment local scaling;
s46, writing the data in the target data updating range into a corresponding position of a video memory for displaying;
in step S45, the start address of the target data update range is reduced by one scaling unit, and the size is increased by two scaling units and then updated.
2. The display card driving module is characterized by comprising:
the data acquisition unit is used for reading the EDID of the display, outputting the EDID by using a default VESA time sequence if the EDID is not valid, otherwise, analyzing the EDID, acquiring all resolutions and time sequences supported by the display and transmitting the resolution and time sequences to the system BIOS;
the output display unit is used for performing display output display by using the resolution and the corresponding time sequence when the system BIOS uses the resolution consistent with the received resolution;
a target selection unit, configured to select, when the system BIOS uses a resolution that does not conform to the received resolution, a maximum resolution that both the graphics card and the display support and a corresponding timing as a target resolution for scaling;
the zooming display unit is used for calculating zooming parameters, zooming the data in the source data storage space to the target data storage space by using a preset zooming mode, and writing the updated data in the target data storage space into a corresponding position of the video memory for displaying;
the target selection unit specifically includes:
the source resolution setting module is used for taking the resolution used by the system BIOS as the source resolution of the self-adaptive scaling;
the target resolution setting module is used for taking the maximum resolution supported by the display card and the display and the corresponding time sequence as the target resolution of the self-adaptive scaling;
the scaling parameter calculation module is used for calculating scaling parameters according to the source resolution and the target resolution;
the zooming display unit specifically comprises:
the device comprises a storage space establishing module, a display data processing module and a display data processing module, wherein the storage space establishing module is used for establishing a source data storage space and a target data storage space, the source data storage space is used for recording display data of a system BIOS, and the target data storage space is used for recording the zoomed display data;
the scaling range determining module is used for acquiring the initial address and the size of the specified updating range of the source data storage space according to the display requirement of the system BIOS and determining the scaling range of the source data;
the updating range determining module is used for correspondingly converting the scaling parameters into the initial address and the size of the target data storage space to be updated according to the calculated scaling parameters and determining the updating range of the target data;
the source data determining module is used for determining data corresponding to a source data scaling range in a source data storage space according to the current display mode of the system BIOS;
the target data scaling module is used for updating data in a source data scaling range to a target data updating range of a target data storage space by using a linear scaling mode of centered alignment local scaling;
the data display module is used for writing the data in the target data updating range into the corresponding position of the video memory for displaying;
in the target data scaling module, the initial address of the target data updating range is reduced by one scaling unit, and the target data is updated after the size of the target data updating range is enlarged by two scaling units.
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