CN102074030B - A kind of acquisition, the method for editing self-defined figure and subtitle graphic manufacturing system - Google Patents
A kind of acquisition, the method for editing self-defined figure and subtitle graphic manufacturing system Download PDFInfo
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- CN102074030B CN102074030B CN200910238542.1A CN200910238542A CN102074030B CN 102074030 B CN102074030 B CN 102074030B CN 200910238542 A CN200910238542 A CN 200910238542A CN 102074030 B CN102074030 B CN 102074030B
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Abstract
The invention provides a kind of acquisition, edit the method for self-defined figure and a kind of subtitle graphic manufacturing system, method wherein specifically comprises: making step: according to the self-defined figure needed for active user, makes plug-in unit; Described plug-in unit describes for the key point and reference mark providing required self-defined figure, and the interface of graphic plotting master routine protocol layer inherited by this plug-in unit; Load step: receive the self-defined figure that user selects, obtains corresponding information from plug-in unit; First step display: according to institute's obtaining information, carries out drafting display to described self-defined figure; Change step: receive user to the movement at certain reference mark, described change information is passed to plug-in unit by described interface; Calculation procedure: after receiving described change information, plug-in unit recalculates key point information, and passes to graphic plotting master routine by described interface; Second step display: the key point information returned according to plug-in unit, shows.The present invention is in order to improve the efficiency of graphic plotting.
Description
Technical field
The present invention relates to computer graphics techniques field, particularly relate to a kind of acquisition, edit the method for self-defined figure and a kind of subtitle graphic manufacturing system.
Background technology
How in a computer the main research of computer graphics is exactly research presentation graphic and utilize computing machine to carry out the calculating of figure, the relative theory of process and display and algorithm.Figure is made up of non-geometric attributes such as the geometric element such as point, line, surface, body and gray scale, color, line style, live widths usually.From treatment technology, figure is mainly divided into two classes, and a class represents based on line information, and as the line frame graph etc. of engineering drawing, contour map, curved surface, another kind of is continuous-tone image, namely usually said photo realism graphic.Computer graphics techniques is widely used in the fields such as diagram text manufacture, planar design, post film and TV production.
Such as, when making subtitle file, existing figure making system generally can provide a graphics element base, and user therefrom can call the drafting that required graphic element carries out figure.Such as, but the graphic element in storehouse is general more limited, only provides the graphic elements such as basic lines, rectangle, ellipse, arc, like this, when user needs to draw free curve, described graphics element base can not satisfy the demands at all; Or when there being demand to the complex figure such as parallelogram, rhombus, trapezoidal, triangle, pentagon, user's by-line of having to is drawn and is obtained required figure, has a strong impact on the efficiency of graphic plotting.
Therefore, the technical matters needing those skilled in the art urgently to solve is exactly: how can draw out required figure, and to improve the efficiency of graphic plotting.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of acquisition, edits the method for self-defined figure and a kind of subtitle graphic manufacturing system, in order to draw out the figure of meeting consumers' demand, and improves the efficiency of graphic plotting.
In order to solve the problem, the invention discloses a kind of acquisition, editing the method for self-defined figure, comprising:
Making step: according to the self-defined figure needed for active user, makes plug-in unit; Described plug-in unit is for providing the key point of required self-defined figure to describe and reference mark description, and the interface of graphic plotting master routine protocol layer inherited by this plug-in unit;
Load step: receive the self-defined figure that user selects, obtains corresponding information from plug-in unit;
First step display: according to institute's obtaining information, carries out drafting display to described self-defined figure;
Change step: receive user to the movement at this self-defined certain reference mark of figure, described change information is passed to plug-in unit by described interface;
Calculation procedure: after receiving described change information, plug-in unit recalculates key point information, and passes to graphic plotting master routine by described interface;
Second step display: according to the key point information after the change that plug-in unit returns, shows this self-defined figure.
Preferably, described self-defined figure is regular figure or irregular figure; And described self-defined figure is closed figure or open figure.
Preferably, described first step display comprises:
First, according to institute's obtaining information, show described self-defined figure;
When clicking this self-defined figure, then show each reference mark.
Preferably, described key point describes the description comprising multiple key point coordinate, and described reference mark describes the description comprising one or more reference mark coordinate;
Described first step display comprises:
Using present cursor position as certain key point coordinate, and according to each key point coordinate and each reference mark coordinate, this self-defined figure is shown.
Preferably, described calculation procedure comprises:
Plug-in unit, according to the reference mark coordinate after described change, calculates the new coordinate of each key point, and passes to graphic plotting master routine by described interface.
The invention also discloses a kind of subtitle graphic manufacturing system, comprising: make module, load-on module, display module, change module and computing module; Wherein,
Described making module, for according to the self-defined figure needed for active user, makes plug-in unit; Described plug-in unit is for providing the key point of required self-defined figure to describe and reference mark description, and the interface of graphic plotting master routine protocol layer inherited by this plug-in unit;
Described load-on module, receives the self-defined figure that user selects, and obtains corresponding information from plug-in unit;
Described display module, for according to institute's obtaining information, or, according to the key point information after the change that described computing module returns, drafting display is carried out to described self-defined figure;
Described change module, for receiving the movement of user to this self-defined certain reference mark of figure, passes to plug-in unit by described change information by described interface;
Described computing module, for after receiving described change information, recalculates key point information, and passes to graphic plotting master routine by described interface.
Preferably, described display module comprises:
Self-defined pattern displaying unit, for according to institute's obtaining information, shows described self-defined figure;
Reference mark display unit, for when clicking this self-defined figure, then shows each reference mark.
Preferably, described key point describes the description comprising multiple key point coordinate, and described reference mark describes the description comprising one or more reference mark coordinate;
Described display module, for using present cursor position as certain key point coordinate, and according to each key point coordinate and each reference mark coordinate, this self-defined figure to be shown.
Described computing module, for according to the reference mark coordinate after described change, calculates the new coordinate of each key point, and passes to graphic plotting master routine by described interface.
Compared with prior art, the present invention has the following advantages:
The present invention, according to the self-defined figure needed for active user, makes plug-in unit; Described plug-in unit is for providing the key point of required self-defined figure to describe and reference mark description, and the interface of graphic plotting master routine protocol layer inherited by this plug-in unit; Therefore, relative to prior art, user cannot draw the figure that some graphic plotting master routines are not supported at all, or, by-line of having to is drawn and is obtained complex figure, the present invention calls the plug-in unit completed at graphic plotting master routine, can draw the self-defined figure demonstrating and meet consumers' demand, thus can improve the efficiency of graphic plotting;
In addition, the present invention can receive the movement of user to this self-defined certain reference mark of figure, described change information is passed to plug-in unit by described interface, key point information is recalculated by plug-in unit, and the key point information after the change returned according to plug-in unit, this self-defined figure is shown again, thus, editor's demand that user constantly updates this self-defined figure can also be met.
Accompanying drawing explanation
Fig. 1 is a kind of acquisition of the present invention, edits the process flow diagram of the embodiment of the method for self-defined figure;
A kind of polygonal schematic diagram of Fig. 2 the present invention;
The schematic diagram of a kind of Bezier of Fig. 3 the present invention;
Fig. 4 is the schematic diagram at a kind of rectangle reference mark of the present invention;
Fig. 5 is the structural drawing of a kind of subtitle graphic manufacturing system of the present invention embodiment.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
One of core idea of the present invention is, the drafting function of plug-in part technology to graphic plotting master routine is adopted to expand, specifically, when user has demand to certain figure, design configuration draws the interface of master routine, this interface is open, and make the plug-in unit corresponding to this figure according to this interface; After plug-in unit completes, call at graphic plotting master routine the drafting function that this plug-in unit can increase this program.
With reference to Fig. 1, show a kind of acquisition of the present invention, edit the process flow diagram of the embodiment of the method for self-defined figure, specifically can comprise:
Making step 101, the self-defined figure of foundation needed for active user, make plug-in unit; Described plug-in unit is for providing the key point of required self-defined figure to describe and reference mark description, and the interface of graphic plotting master routine protocol layer inherited by this plug-in unit;
In specific implementation, by the more open DLL (dynamic link library) of graphic plotting master routine protocol layer, data communication can be carried out to facilitate between this program and plug-in unit.Such as, by graphic plotting master routine sub-module, layering, and DLL (dynamic link library, DynamicLinkLibrary) file can be encapsulated respectively, then, the header file of dll file is supplied to corresponding plug-in unit.
Like this, when graphic plotting master routine starts, the dll file meeting certain specification can be searched in the catalogue preset; After having searched, graphic plotting master routine uses the interface interchange DLL module appointed.
Correspondingly, the life cycle of this plug-in unit is as follows:
1. graphic plotting master routine initialization;
2. in function of initializing function, in the catalogue of specifying, search add-on file, such as, plug-in catalogue;
3. pair each file found, after graphic plotting master routine utilizes WindowApI function AfxLoadLibrary () to import to host's internal memory, by the loading interface function of regulation, such as load () function carries out calling verification, sees whether be the file meeting figure plug-in unit rule;
After 4.load () calls, graphic plotting master routine preserves the name of each module, and quotes each module creation, and like this, the function in module just can be called subsequently;
5., in the process of graphic plotting master routine operation, when user's choice menus item, corresponding defined function will be performed;
6. when closing graphic plotting master routine, call unloading unload () function, be used for discharging the resource of applying in load () function.
In practice, described self-defined figure can be regular figure, as rectangle, circle, pentagon etc.; Also can be irregular figure, as arbitrary polygon, free curve etc.; Both can be closed figure, can be also open figure, the present invention not be limited this.
With reference to figure 2, show a kind of polygon example of the present invention, wherein, each summit is respective polygonal key point, 2A is Fig. 2 (A) leg-of-mutton reference mark, and 2B is the reference mark of Fig. 2 (B) rectangle, and 2C is Fig. 2 (C) hexagonal reference mark; The position at each reference mark determines corresponding polygonal size and shape.
In one preferred embodiment of the invention, Bezier can be adopted to describe described self-defined figure.
One, Bezier figure is introduced
Bezier (Bezier) curve is a kind of important polynomial parametric curves in computer graphics, the individual point of any N (N >=2) in plane can form a Bezier curve, this N number of point is called the node of Bezier curve, and the polygon of described N number of node composition is called the characteristic polygon of Bezier curve.The parametric equation of N Bezier curve is expressed as follows:
Wherein, the polygonal node of Pi representation feature, B
i, nt () is Bernstein polynomial, be called base function, can be expressed as follows:
Therefore, during n=1, Q (t)=(1-t) P
0+ tP
1namely, also Bezier curve is the straight-line segment of connection source P0 and terminal P1;
During n=2, Q (t)=(1-t)
2p
0+ 2t (1-t) P
1+ t
2p
2=(P
2-2P
1+ P
0) t
2+ 2 (P
1-P
0) t+P
0, as made a=(P
2-2P
1+ P
0), b=2 (P
1-P
0), c=P
0, then quadratic bezier curve is para-curve;
During n=3, there are 4 nodes, then
Q(t)＝(1-t)
3P
0+3t(1-t)
2P
1+3t
2(1-t)P
2+t
3P
3
＝B
0，3(t)P
0+B
1，3(t)P
1+B
2，3(t)P
2+B
3，3(t)P
3
Wherein,
P0, P1, P2, P3 tetra-points define three bezier curve in plane or at three dimensions.Curve originates in P0 and moves towards P1, and comes P3 from the direction of P2.Generally can not through P1 or P2, these two points only provide directional information; Further, the spacing between P0 and P1, determines curve before transferring convergence P3, moves towards the length in P2 direction.
Two, the character of Bezier
(1) end points and end points tangent line
Bezier curve is consistent with the trend on the Article 1 limit of characteristic polygon and the last item limit with the tangential direction of destination county at initial point.
(2) symmetry
If keep the invariant position of n all node of Bezier curve, and out of order, then curve is still constant, and just trend is contrary.
(3) convex closure
Because when t is [0,1] during change, Bernstein polynomial sum is 1, and have every to be all greater than 0, thus Bernstein polynomial constitutes the weight function of Bezier curve, and Q (t) is the weighted mean of each node of characteristic polygon, and weight factor is positive number, on geometric figure, this means that each node of curve all should drop in the convex closure of each node formation of characteristic polygon.Convex closure refers to the minimal convex polygon comprising all nodes.
(4) geometric invariance
The shape of curve is only relevant with each node relative position of characteristic polygon, and has nothing to do with the selection of coordinate system.
Three, Bezier example
With reference to figure 3, show a kind of Bezier example, curve in figure is the straight line that forms of the line segment be formed by connecting by node or curve, wherein, 6 reference mark 301 determine 5 control lines 302, further, the position at every bar control line 302 and each reference mark 301 determines the size and shape of segment of curve, and these factors mobile all will change the shape of curve.
The self-defined figure that load step 102, reception user select, obtains corresponding information from plug-in unit;
When the plug-in unit that the self-defined figure selected by loading is corresponding, can load path be specified, such as, this self-defined figure is directly loaded in the graphics element base of present procedure, call for user; Coming for making this self-defined figure and existing graphic element distinguish, special name can be carried out to it.
First step display 103, according to institute's obtaining information, to described self-defined figure carry out drafting display;
When making plug-in unit, coordinate can be adopted to describe described key point or reference mark, such as, described key point describes the description that can comprise multiple key point coordinate, and described reference mark describes the description that can comprise one or more reference mark coordinate.For the polygon such as triangle, rectangle, can each apex coordinate be passed through, calculate corresponding reference mark coordinate; For the characteristic polygon of Bezier curve, according to the parametric equation of each node coordinate and N Bezier curve, corresponding reference mark coordinate can be calculated.
Now, described first step display can be, using present cursor position as certain key point coordinate, and according to each key point coordinate and each reference mark coordinate, shows this self-defined figure.
In specific implementation, described first step display can comprise following sub-step:
Sub-step A1, according to institute's obtaining information, show described self-defined figure;
Sub-step A2, when clicking this self-defined figure, then show each reference mark.
Namely user is when choosing this self-defined figure, just can show each reference mark.
Change step 104, receive user to the movement at this self-defined certain reference mark of figure, described change information is passed to plug-in unit by described interface;
In practice, user often has such demand, namely wishes to carry out editing operation to the self-defined figure of current display, to change the size and shape of this figure.The position at each reference mark described in the plug-in unit due to making determines the size and shape of respective graphical, and therefore, user can pass through mobile reference mark, carries out corresponding editing operation.
With reference to figure 4, show a kind of rectangle reference mark example, wherein, 4A1,4A2,4A3,4A4 represent the stretching reference mark on four borders, upper and lower, left and right respectively, 4B1,4B2,4B3,4B4 represent the stretching reference mark in the upper left corner, the lower left corner, the lower right corner, the upper right corner respectively, and 4C representative rotates reference mark.Like this, user realizes the stretching on four borders by any one reference mark in mobile 4A1-4A4, by any one reference mark in mobile reference mark 4B1-4B4 to carry out stretched operation to four angles, or, with the rectangular centre 4D of acquiescence for rotation center, the anglec of rotation is changed, to realize the object being carried out by this rectangle rotating by the mobile reference mark 4C that rotates.
For aforesaid operations, need the operation that the control window self-defined figure corresponding to plug-in unit is modified, edited, the present invention adopts following scheme:
By host window process all operations message, namely windows messaging is undertaken receiving and distributing by host window, as the input of mouse, keyboard, passes to plug-in unit as required by host window, the figure that plug-in unit provides, is also received by host window and shows after analyzing data.
Calculation procedure 105, after receiving described change information, plug-in unit recalculates key point information, and passes to graphic plotting master routine by described interface;
In practice, described calculating operation can be, plug-in unit, according to the reference mark coordinate after described change, calculates the new coordinate of each key point.
Such as, user moves stretching reference mark 4A1, and due to the ordinate of just upper left key point and the upper right key point of change, and upper left key point is identical with the ordinate of stretching reference mark 4A1 with the ordinate of upper right key point, therefore, the new coordinate of each key point can be easy to obtain; And for example, user moves stretching reference mark 4B1, due to the ordinate of just upper left key point, lower-left key point and the upper right key point of change, and upper left key point is identical with the horizontal ordinate of stretching reference mark 4B1 with the horizontal ordinate of lower-left key point, and, upper left key point is identical with the ordinate of stretching reference mark 4B1 with the ordinate of upper right key point, therefore also can obtain the new coordinate of each key point; For another example, user moves and selects reference mark 4C, no matter how rectangle rotates, and the centre coordinate of rectangle can not change, and, key point before and after rotating is constant to the distance at center, therefore, the anglec of rotation of this rectangle can first be calculated according to the reference mark coordinate before and after centre coordinate and change, then, according to the described anglec of rotation and the key point coordinate before changing, solve the coordinate that makes new advances.
For the characteristic polygon of Bezier curve, the new coordinate acquisition process of its each key point and said process similar, therefore not to repeat here.
Key point information after second step display 106, the change that returns according to plug-in unit, shows this self-defined figure.
Therefore, relative to prior art, user cannot draw the figure that some graphic plotting master routines are not supported at all, or by-line of having to is drawn and obtained complex figure, the present invention is when user has demand to certain figure, the plug-in unit corresponding to this figure can be made, then, call the plug-in unit completed at graphic plotting master routine, the figure of meeting consumers' demand can be drawn out, thus the efficiency of graphic plotting can be improved.
With reference to Fig. 5, show the structural drawing of a kind of subtitle graphic manufacturing system of the present invention embodiment, specifically can comprise: make module 501, load-on module 502, display module 503, change module 504 and computing module 505; Wherein,
Described making module 501, for according to the self-defined figure needed for active user, makes plug-in unit; Described plug-in unit is for providing the key point of required self-defined figure to describe and reference mark description, and the interface of graphic plotting master routine protocol layer inherited by this plug-in unit;
Described load-on module 502, receives the self-defined figure that user selects, and obtains corresponding information from plug-in unit;
Described display module 503, for according to institute's obtaining information, or, according to the key point information after the change that described computing module returns, drafting display is carried out to described self-defined figure;
Described change module 504, for receiving the movement of user to this self-defined certain reference mark of figure, passes to plug-in unit by described change information by described interface;
Described computing module 505, for after receiving described change information, recalculates key point information, and passes to graphic plotting master routine by described interface.
In specific implementation, described display module 503 can comprise:
Self-defined pattern displaying unit, for according to institute's obtaining information, shows described self-defined figure;
Reference mark display unit, for when clicking this self-defined figure, then shows each reference mark.
The present invention can adopt coordinate to describe described key point and reference mark, and such as, described key point describes the description that can comprise multiple key point coordinate, and described reference mark describes the description that can comprise one or more reference mark coordinate;
Now, the function of described display module can be, using present cursor position as certain key point coordinate, and according to each key point coordinate and each reference mark coordinate, shows this self-defined figure.
The function of described computing module can be, according to the reference mark coordinate after described change, calculates the new coordinate of each key point, and passes to graphic plotting master routine by described interface.
For system embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
The present invention can be applied to the fields such as diagram text manufacture, planar design, post film and TV production, in order to increase the graphic plotting function of existing figure making system.
Above to a kind of acquisition provided by the present invention, the method for editing self-defined figure and a kind of subtitle graphic manufacturing system, be described in detail, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (3)
1. obtain, edit a method for self-defined figure, it is characterized in that, comprising:
Making step: according to the self-defined figure needed for active user, makes plug-in unit; Described plug-in unit is for providing the key point of required self-defined figure to describe and reference mark description, and the interface of graphic plotting master routine protocol layer inherited by this plug-in unit; Described key point describes and recalculates based on reference mark description;
Load step: receive the self-defined figure that user selects, obtains corresponding information from plug-in unit;
First step display: according to institute's obtaining information, carries out drafting display to described self-defined figure;
Described first step display comprises:
First, according to institute's obtaining information, show described self-defined figure;
When clicking this self-defined figure, then show each reference mark;
Described key point describes the description comprising multiple key point coordinate, and described reference mark describes the description comprising one or more reference mark coordinate;
Or,
Described first step display comprises:
Using present cursor position as certain key point coordinate, and according to each key point coordinate and each reference mark coordinate, this self-defined figure is shown;
Change step: receive user to the movement at this self-defined certain reference mark of figure, the movement of described reception user to this self-defined certain reference mark of figure is passed to plug-in unit as change information by described interface;
Calculation procedure: after receiving described change information, plug-in unit recalculates key point information, and passes to graphic plotting master routine by described interface;
Wherein, described calculation procedure comprises:
Plug-in unit, according to described change information, calculates the new coordinate of each key point, and passes to graphic plotting master routine by described interface;
Second step display: according to the key point information after the change that plug-in unit returns, shows this self-defined figure.
2. the method for claim 1, is characterized in that, described self-defined figure is regular figure or irregular figure; And described self-defined figure is closed figure or open figure.
3. a subtitle graphic manufacturing system, is characterized in that, comprising: make module, load-on module, display module, change module and computing module; Wherein,
Described making module, for according to the self-defined figure needed for active user, makes plug-in unit; Described plug-in unit is for providing the key point of required self-defined figure to describe and reference mark description, and the interface of graphic plotting master routine protocol layer inherited by this plug-in unit; Described key point describes and recalculates based on reference mark description;
Described load-on module, receives the self-defined figure that user selects, and obtains corresponding information from plug-in unit;
Described display module, for according to institute's obtaining information, or, according to the key point information after the change that described computing module returns, drafting display is carried out to described self-defined figure;
Described display module comprises:
Self-defined pattern displaying unit, for according to institute's obtaining information, shows described self-defined figure;
Reference mark display unit, for when clicking this self-defined figure, then shows each reference mark;
Described key point describes the description comprising multiple key point coordinate, and described reference mark describes the description comprising one or more reference mark coordinate;
Described display module, for using present cursor position as certain key point coordinate, and according to each key point coordinate and each reference mark coordinate, this self-defined figure to be shown;
Described change module, for receiving the movement of user to this self-defined certain reference mark of figure, passes to plug-in unit as change information by described interface using the movement of described reception user to this self-defined certain reference mark of figure;
Described computing module, for after receiving described change information, recalculates key point information, and passes to graphic plotting master routine by described interface;
Wherein, described computing module comprises, and for according to described change information, calculates the new coordinate of each key point, and passes to graphic plotting master routine by described interface.
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