JP2012123739A - Drawing processing apparatus, drawing processing method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress memory consumption and increase the speed of drawing processing.SOLUTION: A drawing processing method comprises the steps of: analyzing a drawing content including graphics information and animation information indicating the change of the graphics information to generate internal data; and generating a drawing instruction on the basis of the generated internal data. A drawing processing apparatus comprises: means for updating the drawing instruction generated on the basis of the internal data to a drawing instruction corresponding to a present time to carry out drawing processing using an updated drawing instruction to a frame corresponding to the present time, when the drawing instruction is updated by the updating means.

Description

  The present invention relates to a drawing processing apparatus, a drawing processing method, and a program suitable for use in, for example, drawing a screen including animation.

  In recent years, a graphical user interface (GUI) including various animation effects has become widespread in devices having a display function. As the animation effect, for example, there is an effect of scaling, rotating, changing color information including transparency, and morphing a figure, image, character or the like. In order to smoothly display these animation effects as a GUI of the device, various speedups have been made so far.

  Conventionally, when drawing content including an animation effect, a method of redrawing a rectangular region including only graphics whose attributes have changed between frames has been common. Since this method limits the area to be redrawn, it can be expected to speed up the drawing process. As another method, there is disclosed a method called sprite that converts a part of graphics into image data and caches the image data (see, for example, Patent Document 1). In this method, since the already drawn result is used, it is possible to omit the process of generating the drawing command by analyzing the graphics. Furthermore, a method is also disclosed in which a rendering command created by analyzing graphics is cached, and rendering is performed by appropriately changing the rendering command (see, for example, Patent Document 2).

JP 2000-148134 A Japanese Patent Laid-Open No. 2-196327

  When drawing a content including an animation effect, if a drawing command is generated every frame, it takes a lot of drawing time, and frames may be dropped during animation. Therefore, it is conceivable to use a method for limiting the area to be redrawn. However, since all the graphics included in the display area have to be drawn in the first frame, the effect of increasing the speed is not obtained so much. In addition, the speed-up effect cannot be expected even when the redrawing area temporarily increases depending on the animation timing.

  Further, the method described in Patent Document 1 requires a large amount of memory capacity to hold the drawing result as image data. Furthermore, when the output size varies depending on the device, the stored image data must be expanded and contracted, resulting in a problem that the image quality deteriorates. Furthermore, in the method described in Patent Document 2, since drawing commands relating to all graphics are held, a large amount of memory capacity is required depending on the number of graphics and animation time.

  SUMMARY OF THE INVENTION In view of the above-described problems, the present invention has an object to reduce the amount of memory used and to speed up the drawing process.

  The drawing processing apparatus of the present invention analyzes drawing content including graphics information and animation information indicating a change in the graphics information, generates internal data, and generates the internal data by the internal data generating unit A drawing command generating unit that generates a drawing command based on the internal data generated; a drawing unit that performs a drawing process using the drawing command generated by the drawing command generating unit; and the drawing command generation based on the internal data Updating means for updating the drawing instruction generated by the means to a drawing instruction corresponding to the current time, and the drawing means corresponds to the current time when the drawing instruction is updated by the updating means. A drawing process is performed on the frame using the updated drawing command.

  According to the present invention, it is possible to reduce the amount of memory used and to speed up the drawing process.

It is a block diagram which shows the hardware structural example of the drawing processing apparatus which concerns on embodiment. It is a block diagram which shows the function structural example of the drawing processing apparatus which concerns on embodiment. It is a figure which shows an example of the drawing content made to draw with a drawing processing apparatus. It is a figure which shows an example of the drawing content which consists of a structured document of an XML format. It is a flowchart which shows an example of the process sequence before updating a drawing command. It is a figure which shows an example of the model showing internal data. It is a figure which shows an example of the drawing command set of the 1st frame. It is a flowchart which shows an example of the process sequence at the time of performing a drawing process. It is a figure which shows an example of the updated drawing command set.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating a hardware configuration example of the drawing processing apparatus 100 according to the present embodiment.
In FIG. 1, a CPU 101 is a system control unit and controls the entire drawing processing apparatus 100. The ROM 102 is a read-only memory that stores programs and parameters that do not need to be changed. The RAM 103 is a rewritable memory that temporarily stores programs and data supplied from an external device and the like, and internal data and drawing commands described later are stored in the RAM 103.

  The input unit 104 is an interface with an input device 107 such as a pointing device or a keyboard that receives data from a user and inputs data. The output unit 105 is an interface with the monitor 108 for displaying data output by the drawing processing apparatus 100. The system bus 106 is a bus that connects the units of the CPU 101 to the output unit 105 so that they can communicate with each other.

  In addition to the ROM 102, the following may be used as a storage medium for supplying the program code to the configuration described above. For example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a memory card, a DVD, and the like may be added to the configuration of the drawing processing apparatus 100 of this embodiment.

FIG. 2 is a block diagram illustrating a functional configuration example of the drawing processing apparatus 100 according to the present embodiment.
In the drawing processing apparatus 100 illustrated in FIG. 2, the drawing content analysis unit 202 analyzes the input drawing content 201. Then, the internal data generation unit 203 generates internal data that is data in an internal format from the analysis result. The drawing command generation unit 204 generates a drawing command for each graphic based on the generated internal data.

  The current time acquisition unit 205 acquires time information when drawing a frame. The drawing command update determining unit 206 determines whether to update the drawing command generated by the drawing command generating unit 204 from the internal data and the time acquired by the current time acquiring unit 205. When it is determined that the drawing command is to be updated, the drawing command updating unit 207 updates the graphics drawing command. The drawing processing unit 208 performs drawing processing based on the drawing command generated in advance by the drawing command generation unit 204 or the drawing command updated by the drawing command update unit 207, and outputs the drawing result to the display unit 209.

  FIG. 3 is a diagram illustrating an example of drawing content drawn by the drawing processing apparatus 100 of the present embodiment. The drawing content shown in FIG. 3 includes a figure 301 and a figure 302, and animation information is defined in which the figure 302 moves to a position 303 over 4 seconds after 3 seconds from the start of drawing. FIG. 4 is a diagram showing a description example of the above-described drawing content in a two-dimensional vector graphics format SVG (Scalable Vector Graphics) which is a structured document in XML (extensible Markup Language) format. In the present embodiment, the SVG data shown in FIG. 4 is used as input data. However, as long as shape information relating to graphics, color information including transparency, position information, and state information are included, the SVG data is not limited to SVG data. It does not have to be a structured document. In addition to graphics, graphics information such as images and characters may be included in the drawing content.

FIG. 5 is a flowchart showing an example of a preprocessing procedure in the present embodiment. In the description of FIG. 5, a case where the SVG data shown in FIG. 4 is input will be described as an example.
First, the drawing content analysis unit 202 analyzes the SVG data shown in FIG. 4 as the drawing content 201, and the internal data generation unit 203 generates internal data based on the analysis result (S501).

  FIG. 6 is a diagram illustrating an example of a model representing generated internal data. In the present embodiment, the internal data is represented in a document object model (DOM) tree format, but it may not be in the DOM tree format. The example illustrated in FIG. 6 includes an svg element 601 that is a root node and a circle element 602 and a rect element 603 that are child elements thereof. A circle element 602 and a rect element 603 represent the figures 301 and 302 shown in FIG. 3, respectively. In addition, as a child element of the rect element 603, there is an animateTransform element 604, which represents that the graphic 302 in FIG. 3 is animated (changed) with time.

  Next, the drawing command generation unit 204 generates a drawing command necessary for drawing a specific frame from the generated internal data (S502). In the present embodiment, a drawing command relating to the first frame is created, but it is not necessarily the first frame, and a drawing command corresponding to an arbitrary frame may be created. In addition, drawing commands for a plurality of frames may be created.

  FIG. 7 is a diagram illustrating an example of a drawing command set for the first frame. Drawing commands 701 and 702 in FIG. 7 represent drawing commands for the graphics 301 and 302 in FIG. 3, respectively. Each drawing command is composed of commands relating to painting, deformation, and drawing, but other commands may be included. In addition, it is assumed that shape information and position information of the graphic 301 are stored in “CIRCLE_DATA”, and shape information and position information of the graphic 302 are stored in “RECT_DATA”.

  Then, the internal data generation unit 203 obtains information about the time at which the graphic constituting the drawing content starts animation from the generated internal data and ends the processing (S503). In the present embodiment, information of a value of 3 seconds after the time when the graphic 302 starts animation is acquired.

  FIG. 8 is a flowchart illustrating an example of a processing procedure when actually performing a drawing process in the present embodiment. In this embodiment, when starting the processing of FIG. 8, the internal data generated by the procedure shown in FIG. 5, the drawing command set relating to the first frame, and the information of the animation start time are held in advance. Assuming

  First, the current time acquisition unit 205 acquires information on the current time (S801). In the present embodiment, the time indicates a relative time when the time for starting the drawing process is 3 seconds. When the drawing time is the first frame, information on the time 0 second is acquired. Next, the drawing command update determination unit 206 compares the animation start time acquired in S503 in FIG. 5 with the time acquired in S801 (S802). As a result of the comparison, if the current time is before the animation start time, the drawing processing unit 208 performs drawing using the drawing command set created in S502 of FIG. 5 (S803), and returns to S801. .

  On the other hand, as a result of the comparison in S802, if not, the drawing command update unit 207 creates a new drawing command at the time acquired in S801 based on the internal data held in advance, and creates it in S502 The drawing command is updated (S804). The drawing processing unit 208 performs a drawing process using the updated drawing command (S803), and returns to S801.

  FIG. 9 is a diagram illustrating an example of a drawing command set that has been updated in S804. The example shown in FIG. 9 represents a frame drawing command set from 3 seconds after the drawing process starts until 7 seconds after the animation ends. The drawing command 901 related to the graphic 301 in FIG. 3 is not different from the drawing command 701 in FIG. 7, but the graphic 302 is being animated, so the second and third arguments of the SetMatrix function of the drawing command 902 are updated to tx and ty, respectively. Has been. These tx and ty represent coordinates that move from the position immediately before the figure 302 starts the animation to the time acquired in S801.

  In the present embodiment, a partial update function may be used in which only a region that has changed from the previous frame is subject to redrawing. In this case, it is particularly effective when it is necessary to draw the entire area of the frame as in the first frame, or when the changed portion from the previous frame is large due to animation. For example, the drawing command generation unit 204 may acquire information on a redrawing area including a changed portion from the previous frame from the internal data, and determine a drawing command frame based on the size of the redrawing area.

  When drawing commands relating to a plurality of frames are created, the drawing command update unit 207 selects a drawing command for the frame closest to the current time and updates the selected drawing command. Good.

  As described above, according to the present embodiment, the internal data is generated from the drawing content, and the drawing command for the frame where the animation is started is updated using the generated internal data and the drawing command for the specific frame. did. Thereby, it is not necessary to store a drawing command for each frame, and a specific frame can be drawn at high speed.

(Other embodiments)
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

201 drawing content 203 internal data generation unit 204 drawing command generation unit 207 drawing command update unit 208 drawing processing unit

Claims (10)

Internal data generation means for generating internal data by analyzing drawing content including graphics information and animation information indicating a change in the graphics information;
A drawing command generating means for generating a drawing command based on the internal data generated by the internal data generating means;
A drawing unit that performs a drawing process using the drawing command generated by the drawing command generation unit;
Updating means for updating the drawing command generated by the drawing command generation unit based on the internal data to a drawing command corresponding to the current time;
When the drawing unit is updated by the updating unit, the drawing unit performs a drawing process on the frame corresponding to the current time using the updated drawing command. .   The drawing processing apparatus according to claim 1, wherein the drawing command generation unit generates a drawing command related to a frame at an arbitrary time based on the internal data.   The drawing command generation means acquires information on a redrawing region including a changed portion from the previous frame based on the internal data, and generates a drawing command frame to be generated according to the size of the acquired redrawing region. The drawing processing device according to claim 1, wherein the drawing processing device is determined.   The apparatus further comprises a determination unit that acquires an animation start time from the internal data, compares the current time with the animation start time, and determines whether to update the drawing command. The drawing processing apparatus according to claim 1.   The update means, when a plurality of drawing commands are created by the drawing command generation means, selects a drawing command related to a frame closest to the current time, and updates the selected drawing command. The drawing processing apparatus according to any one of claims 1 to 4.   The drawing processing apparatus according to claim 1, wherein the graphics information includes shape information relating to graphics, color information including transparency, position information, and state information.   The drawing processing apparatus according to claim 6, wherein the graphics are at least one of a figure, a character, and an image.   The drawing processing apparatus according to claim 1, wherein the drawing content is a structured document. An internal data generation step of generating internal data by analyzing drawing content including graphics information and animation information indicating a change in the graphics information;
A drawing command generating step for generating a drawing command based on the internal data generated in the internal data generating step;
A drawing step of performing a drawing process using the drawing command generated in the drawing command generation step;
Updating the drawing command generated in the drawing command generating step based on the internal data to a drawing command corresponding to the current time,
In the drawing step, when the drawing command is updated in the updating step, the drawing processing is performed on the frame corresponding to the current time by using the updated drawing command. Method. An internal data generation step of generating internal data by analyzing drawing content including graphics information and animation information indicating a change in the graphics information;
A drawing command generating step for generating a drawing command based on the internal data generated in the internal data generating step;
A drawing step of performing a drawing process using the drawing command generated in the drawing command generation step;
Updating the drawing command generated in the drawing command generation step based on the internal data to a drawing command corresponding to the current time;
In the drawing step, when the drawing command is updated in the updating step, the drawing process is performed on the frame corresponding to the current time by using the updated drawing command.

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