CN104820360B - Simulate clock display method - Google Patents
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- CN104820360B CN104820360B CN201510212102.4A CN201510212102A CN104820360B CN 104820360 B CN104820360 B CN 104820360B CN 201510212102 A CN201510212102 A CN 201510212102A CN 104820360 B CN104820360 B CN 104820360B
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Abstract
The invention discloses a kind of simulation clock display methods, including:Obtain the time;Within each figure layer refresh cycle, according to the dial plate picture materials of simulation clock, pixel assignment is carried out to each pixel in the display data needed for show layers;According to the acquired time, the needle body position of simulation clock and needle body pixel value in each figure layer refresh cycle is obtained, and utilize the needle body position and the needle body pixel value, update the display data;According to updated display data, figure layer interface is refreshed every a figure layer refresh cycle, to show simulation clock.Using technical solution of the present invention, minimum system resource realization can be used to show simulation clock in single figure layer.
Description
Technical field
The present invention relates to display technology fields, more particularly to a kind of simulation clock display method.
Background technology
Currently, electric terminal, including vehicle electronics terminal are required for providing the function of clock display substantially.It is usually most of
Electric terminal all be display digital dock, as shown in Figure 1, less electric terminal display simulation clock.
When electric terminal display engine can support the interface display of multiple figure layers, it is easier to realize simulation clock
Display is only illustrated with Fig. 2, and dial plate material 201, hour hands material 202, minute hand material are realized respectively in four different figure layers
203 and second hand material 204 display, final display effect is one when can show, the simulation clock 200 of minute, second.
Wherein described material can be picture, and each pixel corresponds to a RGBA values (red, green, blue, transparency) in picture, to
Different display effects may be implemented.
When electric terminal computing capability and memory space are than relatively limited, such as the display engine of vehicle electronics terminal is general
When only supporting two figure layers, one of figure layer is also needed as the dedicated video layer of video playing, and another figure layer is as HMI
(Human Machine Interface, man-machine interface) layer uses, then simulation clock can only be realized in mono- figure layer of HMI
Display.Accordingly, it is desirable to provide a kind of simulation clock display method, limited in electric terminal resource, can use
Minimum system resource realizes the display of the simulation clock in single figure layer.
Invention content
Based on this, it is necessary to provide a kind of simulation clock display method, minimum system resource can be used to realize in list
Simulation clock is shown in a figure layer.
A kind of simulation clock display method, including:
Obtain the time;
Within each figure layer refresh cycle, according to the dial plate picture materials of simulation clock, to aobvious needed for show layers
Each pixel of the registration in carries out pixel assignment;
According to the acquired time, the needle body position of simulation clock and needle body pixel in each figure layer refresh cycle are obtained
Value, and the needle body position and the needle body pixel value are utilized, update the display data;
According to updated display data, figure layer interface is refreshed every a figure layer refresh cycle, to show
Simulate clock.
In one embodiment, the time acquired in the basis obtains simulating clock in each figure layer refresh cycle
Needle body position and needle body pixel value, and utilize the needle body position and the needle body pixel value, update the display data
Step, including:
The needle body that all types of needle body of simulation clock is often rotated along simulation clock center corresponding to 6 ° is prestored to index
Number and needle body picture materials, include background pixel point and needle body pixel in the needle body picture materials;
According to the acquired time, the needle body call number and needle body picture of the time corresponding all types of needle body are calculated
Material;
Load corresponding needle body picture materials;
The background pixel point in needle body picture materials is filtered out, and goes in update display data to correspond to according to needle body pixel
The pixel value of pixel at position.
In one embodiment, the time acquired in the basis obtains simulating clock in each figure layer refresh cycle
Needle body position and needle body pixel value, and utilize the needle body position and the needle body pixel value, update the display data
Step, including:
Prestore the needle body picture materials for being in reference position corresponding to all types of needle body of simulation clock, the needle
Body picture materials include background pixel point and needle body pixel;
According to the acquired time, calculate the time corresponding all types of needle bodies to be rotated relative to the reference position
Angle;
The time corresponding needle body picture element is calculated by angular transformation according to the needle body picture materials of reference position
The pixel value of each pixel in material;
The background pixel point in obtained needle body picture materials after calculating is filtered out, and goes to update according to needle body pixel
The pixel value of corresponding position pixel in display data.
In one embodiment, the needle body picture materials according to reference position, by angular transformation, when calculating described
Between in corresponding needle body picture materials the step of the pixel value of each pixel, further include:
The position coordinates of each pixel in the time corresponding needle body picture materials are calculated by angle inverse transformation
Obtain corresponding floating-point coordinate value in the needle body picture materials of reference position;
It is corresponding using the algorithm calculating time of linear interpolation to the pixel of the floating-point coordinate value close position
The pixel value of each pixel in needle body picture materials.
In one embodiment, the background pixel point and the pixel that the needle body pixel is different colours.
In one embodiment, the background pixel point is red pixel point, and the needle body pixel is white pixel point.
In one embodiment, the dial plate picture materials and the needle body picture materials are JPG format pictures.
In one embodiment, the figure layer refresh cycle is 1 second;The all types of needle body include hour hands needle body,
Minute hand needle body and second hand needle body.
In one embodiment, the figure layer refresh cycle is 1 second;The all types of needle body include hour hands needle body and
Minute hand needle body.
In one embodiment, the figure layer refresh cycle is 1 minute;The all types of needle body include hour hands needle body and
Minute hand needle body.
Above-mentioned simulation clock display method first carries out assignment according to dial plate picture materials to display data, and then basis obtains
The time taken determines position and pixel value corresponding to needle body, then to being updated at the corresponding position of display data, final every
Every a figure layer refresh cycle, refresh figure layer according to display data, to realize the display of simulation clock, as a result, in electronics
In the case of terminal system resource is limited, minimum system resource can be used to realize the display of simulation clock.
Description of the drawings
Fig. 1 is the interface schematic diagram that digital dock is shown in traditional technology;
Fig. 2 is the schematic diagram that a multi-layer image realizes simulation clock display in traditional technology;
Fig. 3 is the flow diagram of the simulation clock display method in one embodiment;
Fig. 4 is the dial plate picture materials schematic diagram in one embodiment
Fig. 5 A are the flow diagram that display data is updated in one embodiment;
Fig. 5 B are the several needle body call numbers and needle body picture materials schematic diagram of the hour hands needle body in one embodiment;
Fig. 6 A are the flow diagram that display data is updated in one embodiment;
Fig. 6 B are the needle body picture materials schematic diagram of the minute hand needle body at the reference position in one embodiment.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 is that the time is shown in the form of digital dock in traditional technology.Fig. 2 is in traditional technology by multiple figure layers reality
Now simulate the display of clock, such as the display dial in an independent figure layer, shown in its excess-three figure layer hour hands, minute hand and
Second hand, dial plate, hour hands, minute hand, second hand can correspond to different PNG pictures, therefore realization mould is relatively easy in multi-layer image
The display of quasi- clock.And when electric terminal resource is limited, display engine is supported in less figure layer, it is necessary to which a kind of offer is a kind of
The method that simulation clock is shown in free hand drawing layer.
Referring to Fig. 3, a kind of simulation clock display method is provided in one embodiment, being particularly suitable for system resource has
On the electric terminal such as vehicle-mounted display terminal of limit.This method includes:
Step 301, the time is obtained.
Specifically, electric terminal needs the time shown on simulation clock that can be obtained by network, or by satellite
Carry out time service.Electric terminal can obtain the time every 1 second.
Step 302, within each figure layer refresh cycle, according to the dial plate picture materials of simulation clock, to show layers
Each pixel in required display data carries out pixel assignment.
Specifically, the figure layer refresh cycle in this step can be 1 second, simulation clock to display can wrap simultaneously
Containing hour hands, minute hand and second hand.The figure layer refresh cycle can also be 1 minute, simulation clock to display only need to contain hour hands and
Minute hand.In addition, the figure layer refresh cycle can be 1 second, and simulates clock and contained only hour hands and minute hand.The work of above-mentioned three kinds of situations
Principle is similar, in embodiments of the present invention, with the figure layer refresh cycle be 1 second, shown simulation clock simultaneously comprising hour hands,
The case where minute hand and second hand, illustrates, and other situations repeat no more.
It as a result, in this step, within each figure layer refresh cycle (1 second), can be according to dial plate picture as shown in Figure 4
Material, dial plate picture materials are JPG format pictures, entitled Simu_clock_background.jpg.It is real in the present embodiment
Simulation clock display in existing free hand drawing layer, in each figure layer refresh cycle, figure layer refreshes once, and figure layer is shown corresponding to certain big
Small display data if each pixel corresponds to the RGBA values of 4 bytes, is then shown for each second by taking 800 × 480 resolution ratio as an example
The size for the display data shown is 800 × 480 × 4 bytes.Dial plate picture materials in this step can have identical with figure layer
Size, can also be sub-fraction in figure layer, the position in the figure layer of being shown in can be configured in advance, such as be arranged
Coordinate value of the good dial plate picture materials in figure layer.This step clicks through each pixel in display data according to dial plate picture materials
Row pixel assignment so as to when figure layer refreshes, may be implemented the display of dial plate, such as the scale including dial plate, becomes on disk
The Arabic numerical value at hour etc..
Step 303, according to the acquired time, obtain in each figure layer refresh cycle the needle body position of simulation clock and
Needle body pixel value, and the needle body position and the needle body pixel value are utilized, update the display data.
Specifically, with the figure layer refresh cycle for 1 second in this step, simulation clock needle body comes comprising hour hands, minute hand and second hand
Citing.In simulating clock, center of the second hand needle body every second relative to simulation clock rotates clockwise 6 °, each point of minute hand
Clock rotates clockwise 6 °, and hour hands often spend 12 minutes with minute hand and rotate 6 °.Acquiescently, the needle body size of hour hands, minute hand, second hand
Fixed, color is also set in advance as fixing certain color, therefore according to the time of acquisition and the pivot rule of needle body, so that it may with
Pixel at these positions is assigned a value of the pixel value of needle body pixel by the position for calculating needle body, to realize display number
According to update.
Step 304, according to updated display data, figure layer interface is refreshed every a figure layer refresh cycle,
To show simulation clock.
Specifically, updated display data, the data containing dial plate part, also data containing body sections, as a result,
The simulation clock of specific time can be shown every a figure layer refresh cycle.
It is the flow diagram that display data is updated in one embodiment referring to Fig. 5 A and Fig. 5 B.The process includes:
Step 501, all types of needle body of simulation clock is prestored often to rotate corresponding to 6 ° along simulation clock center
Needle body call number and needle body picture materials include background pixel point and needle body pixel in needle body picture materials.
Specifically, dial plate picture materials and needle body picture materials are JPG format pictures in the present embodiment.All types of needle bodies
May include hour hands needle body, minute hand needle body and second hand needle body.Referring to Fig. 5 B, the needle body picture materials of hour hands needle body include Hour_
00.jpg ... Hour_15.jpg ... wait 60 pictures materials, that is, simulate hour hands and often rotate the picture corresponding to 6 °, needle body rope
Quotation marks are respectively 0,1 ... 59.Include background pixel point and needle body pixel in needle body picture materials.For example, in Fig. 5 B "
" background pixel point is red pixel point to blank, and " solid " needle body pixel in Fig. 5 B is white pixel point.
Step 502, according to the acquired time, calculate the time corresponding all types of needle body needle body call number and
Needle body picture materials.
Specifically, in simulating clock, center of the second hand needle body every second relative to simulation clock rotates clockwise 6 °,
Minute hand each minute rotates clockwise 6 °, and hour hands rotate 6 ° as minute hand often spends 12 minutes, can be by obtaining according to this rule
The needle body call number and needle body picture materials of corresponding all types of needle bodies is calculated in the time taken.
Step 503, corresponding needle body picture materials are loaded.
Specifically, the needle body picture materials of hour hands are added in memory first.After completing step 504, when release
The needle body picture materials of needle, then equally the needle body picture of minute hand and second hand is handled, realize the update of display data.
Step 504, the background pixel point in needle body picture materials is filtered out, and goes update to show number according to needle body pixel
According to the pixel value of middle corresponding position pixel.
Specifically, using background pixel point as red pixel point in this example, needle body pixel is for white pixel point.Work as handle
After needle body picture materials are loaded into memory, judge the pixel for background pixel point or needle body according to the pixel value of pixel successively
Pixel, when pixel be red pixel point, then be background, be not processed, when pixel be white pixel point, then be needle body picture
Vegetarian refreshments, corresponding pixel points (dial plate picture materials and the needle body picture element pixel value at the position being assigned in display data
The upper left corner of material is aligned in advance), to realize the update of display data.
Referring to Fig. 6 A and Fig. 6 B, the update of display data is realized in another embodiment, including:
Step 601, the needle body picture element for being in reference position corresponding to all types of needle body of simulation clock is prestored
Material, needle body picture materials include background pixel point and needle body pixel.
Specifically, all types of needle bodies can include hour hands needle body, minute hand needle body and second hand needle body.Reference position can with but
It is not limited to the direction that all types of needle bodies is respectively directed to 12 o'clock or 3 o'clock.Referring to Fig. 6 B, the minute hand needle body at reference position
In picture materials minute_base.jpg, minute hand is directed toward 3 o'clock direction.(RGBA values are comprising red in needle body picture materials
255,0,0,255) the needle body pixel of background pixel point and white (RGB values are 255,255,255,255).
Step 602, it according to the acquired time, calculates time corresponding all types of needle body relative fiducial positions to be rotated
Angle.
Specifically, calculating the rotation angle of all types of needle bodies according to the time as previously mentioned, principle is identical.
Step 603, it is calculated, time corresponding needle body figure by angular transformation according to the needle body picture materials of reference position
The pixel value of each pixel in piece material.
Specifically, the different types of needle body of this step is separately handled, illustrated with minute hand needle body in this step.
This step includes:
(1), the position coordinates of each pixel in time corresponding needle body picture materials are calculated by angle inverse transformation
Obtain corresponding floating-point coordinate value in the needle body picture materials of reference position.Calculation formula is:
X=(X '-X0)cosθ+(Y′-Y0)sinθ+X0
Y=(Y '-Y0)cosθ-(X′-X0)sinθ+Y0
Wherein, θ is rotation angle, (X0, Y0) it is dial plate centre coordinate, (X ', Y ') is that the postrotational pixel of angle is sat
Mark, the pixel point coordinates on the basis of (X, Y) in position picture.
(2), time corresponding needle body is calculated using the algorithm of linear interpolation to the pixel of floating-point coordinate value close position
The pixel value of each pixel in picture materials, specific formula are:
F (i+u, j+v)=(1-u) (1-v) f (i, j)+(1-u) vf (i, j+1)+u (1-v) f (i+1, j)+uvf (i+1, j+
1),
Wherein, (i+u, j+v) is floating-point coordinate value, and i, j are integer, and u, v are decimal, and f (i+u, j+v) is after angular transformation
Pixel value, the pixel value of the pixel on the basis of f (i, j), f (i, j+1), f (i+1, j), f (i+1, j+1) in position picture.
Step 604, the background pixel point in obtained needle body picture materials after calculating is filtered out, and according to needle body pixel
Point removes the pixel value of corresponding position pixel in update display data.
Specifically, going out background pixel point and needle body pixel according to the value distinguishing of pixel value, background pixel point is not made
Processing, will be in the pixel value update to display data of needle body pixel.
Simulation clock display method in above-described embodiment first carries out assignment according to dial plate picture materials to display data,
Then position and pixel value corresponding to needle body are determined according to the time of acquisition, then to being carried out more at the corresponding position of display data
Newly, finally refresh figure layer according to display data every a figure layer refresh cycle, to realize the display of simulation clock, by
This can use minimum system resource to realize the display of simulation clock in the case of electric terminal limited system resources.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (9)
1. a kind of simulation clock display method, which is characterized in that the method includes:
Obtain the time;
Within each figure layer refresh cycle, according to the dial plate picture materials of simulation clock, to the display number needed for show layers
Each pixel in carries out pixel assignment;
According to the acquired time, the needle body position of simulation clock and needle body pixel value in each figure layer refresh cycle are obtained,
And the needle body position and the needle body pixel value are utilized, update the display data;
According to updated display data, figure layer interface is refreshed every a figure layer refresh cycle, to show simulation
Clock;
Time acquired in the basis obtains the needle body position of simulation clock and needle body pixel in each figure layer refresh cycle
Value, and the step of utilizing the needle body position and the needle body pixel value, updating the display data, including:
Prestore all types of needle body of simulation clock along simulation clock center often rotate needle body call number corresponding to 6 ° and
Needle body picture materials include background pixel point and needle body pixel in the needle body picture materials;
According to the acquired time, the needle body call number and needle body picture element of the time corresponding all types of needle body are calculated
Material;
Load corresponding needle body picture materials;
The background pixel point in needle body picture materials is filtered out, and corresponding position in update display data is gone according to needle body pixel
Locate the pixel value of pixel.
2. according to the method described in claim 1, it is characterized in that, time acquired in the basis, obtains each figure layer
The needle body position of simulation clock and needle body pixel value in refresh cycle, and the needle body position and the needle body pixel value are utilized,
The step of updating the display data, including:
Prestore the needle body picture materials for being in reference position corresponding to all types of needle body of simulation clock, the needle body figure
Piece material package contains background pixel point and needle body pixel;
According to the acquired time, the time corresponding all types of needle bodies are calculated relative to the reference position angle to be rotated
Degree;
It is calculated in the time corresponding needle body picture materials by angular transformation according to the needle body picture materials of reference position
The pixel value of each pixel;
The background pixel point in obtained needle body picture materials after calculating is filtered out, and goes update to show according to needle body pixel
The pixel value of corresponding position pixel in data.
3. according to the method described in claim 2, it is characterized in that, the needle body picture materials according to reference position, pass through
Angular transformation the step of calculating the pixel value of each pixel in the time corresponding needle body picture materials, further includes:
The position coordinates of each pixel in the time corresponding needle body picture materials are calculated by angle inverse transformation
Corresponding floating-point coordinate value in the needle body picture materials of reference position;
The time corresponding needle body is calculated using the algorithm of linear interpolation to the pixel of the floating-point coordinate value close position
The pixel value of each pixel in picture materials.
4. method according to any one of claims 1 to 3, which is characterized in that the background pixel point and the needle body picture
Vegetarian refreshments is the pixel of different colours.
5. according to the method described in claim 4, it is characterized in that, the background pixel point be red pixel point, the needle body
Pixel is white pixel point.
6. method according to claim 1 or 2, which is characterized in that the dial plate picture materials and needle body picture element
Material is JPG format pictures.
7. method according to claim 1 or 2, which is characterized in that the figure layer refresh cycle is 1 second;It is described all kinds of
The needle body of type includes hour hands needle body, minute hand needle body and second hand needle body.
8. method according to claim 1 or 2, which is characterized in that the figure layer refresh cycle is 1 second;It is described all kinds of
The needle body of type includes hour hands needle body and minute hand needle body.
9. method according to claim 1 or 2, which is characterized in that the figure layer refresh cycle is 1 minute;It is described all kinds of
The needle body of type includes hour hands needle body and minute hand needle body.
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JP6680165B2 (en) * | 2016-09-23 | 2020-04-15 | カシオ計算機株式会社 | Image display device, image display method, and program |
CN109308173B (en) * | 2017-07-26 | 2021-10-15 | 腾讯科技(深圳)有限公司 | Display method and device, display terminal and computer storage medium |
CN109739405A (en) * | 2018-12-29 | 2019-05-10 | 努比亚技术有限公司 | A kind of display control method, mobile terminal and computer readable storage medium |
CN110825468A (en) * | 2019-09-18 | 2020-02-21 | 昇显微电子(苏州)有限公司 | Method and device for realizing analog clock |
CN110932811B (en) * | 2019-11-01 | 2021-05-25 | 华迪计算机集团有限公司 | Network clock system of electronic government internal network |
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