WO2015173954A1 - Dispositif de dessin, procédé de dessin et programme d'ordinateur pour dessiner - Google Patents

Dispositif de dessin, procédé de dessin et programme d'ordinateur pour dessiner Download PDF

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Publication number
WO2015173954A1
WO2015173954A1 PCT/JP2014/063090 JP2014063090W WO2015173954A1 WO 2015173954 A1 WO2015173954 A1 WO 2015173954A1 JP 2014063090 W JP2014063090 W JP 2014063090W WO 2015173954 A1 WO2015173954 A1 WO 2015173954A1
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Prior art keywords
display screen
divided
pixel
divisions
data
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PCT/JP2014/063090
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English (en)
Japanese (ja)
Inventor
康 洲鎌
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富士通株式会社
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Priority to PCT/JP2014/063090 priority Critical patent/WO2015173954A1/fr
Publication of WO2015173954A1 publication Critical patent/WO2015173954A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory

Definitions

  • the present invention relates to, for example, a drawing apparatus, a drawing method, and a drawing computer program for drawing an image on a display device.
  • a capacity equivalent to the number of pixels of the entire display screen is stored in order to store the image data to be drawn.
  • a memory with is used.
  • the display screen has a so-called SVGA, that is, a size of 800 pixels ⁇ 600 pixels, and the depth and color data per pixel are represented by 8 bytes
  • the memory capacity of the frame buffer is about 3.7 MBytes. It becomes.
  • the frame buffer requires a large memory capacity.
  • a drawing apparatus that uses a line buffer instead of a frame buffer has been proposed by using a method of performing drawing processing for each scanning line on the screen, which is called a scan line method (for example, see Patent Document 1). reference).
  • an image can be drawn on a plurality of display screens using a memory having a memory capacity smaller than that required for storing the entire image data to be displayed on any one of the plurality of display screens.
  • a drawing device includes pixel data included in an image displayed on a first display screen of a first display device and pixel data included in an image displayed on a second display screen of a second display device. , A number of first divided areas obtained by dividing one or more images displayed on the first display screen in a predetermined period into a plurality of first divided areas, and a first number in the predetermined period. The division of the first display screen in the scanning direction so that the number of second divided areas obtained by dividing one or more images displayed on the two display screens into a plurality of second divided areas is equal.
  • a drawing ratio calculation unit for calculating the number and the number of divisions in the scanning direction of the second display screen, and a plurality of images displayed on the first display screen according to the number of divisions in the scanning direction of the first display screen. Divided into one divided area and divided in the scanning direction of the second display screen. A division unit that divides an image displayed on the second display screen into a plurality of second divided areas according to the number, data of each pixel in the first divided area, and data of each pixel in the second divided area Are alternately stored in the buffer.
  • the drawing apparatus disclosed in the present specification uses a memory having a memory capacity smaller than a memory capacity required for storing the entire image data to be displayed on any of the plurality of display screens. You can draw an image.
  • FIG. 1 is a schematic configuration diagram of a drawing apparatus according to an embodiment.
  • FIG. 2 is a diagram illustrating an example of display screens of two display devices according to the present embodiment.
  • FIG. 3 is a functional block diagram of the coordinate conversion unit.
  • FIG. 4 is a conceptual diagram of a memory circuit that stores drawing commands for each display screen.
  • FIG. 5 is a functional block diagram of the selection unit.
  • FIG. 6 is a conceptual diagram of a storage unit that stores drawing commands for each display screen.
  • FIG. 7 is a diagram illustrating the order of graphic information read by the read control unit of the image generation unit.
  • FIG. 8 is a functional block diagram of the image generation unit.
  • FIG. 9 is a diagram illustrating an example of pixel data of each divided region stored in the line depth buffer.
  • FIG. 9 is a diagram illustrating an example of pixel data of each divided region stored in the line depth buffer.
  • FIG. 10 is an operation flowchart of the drawing process.
  • FIG. 11 is a diagram illustrating an example in which the aspect ratio of the display screen of one display device is not an integer multiple of the aspect ratio of the display screen of the other display device.
  • FIG. 12 is a diagram showing the order of the divided areas stored in the line depth buffer 5 in the example shown in FIG.
  • the drawing apparatus divides an image displayed on each of a plurality of display screens into a plurality of divided regions.
  • the drawing apparatus is configured such that the number of divided areas obtained from an image displayed on one display screen during a certain period is equal to the number of divided areas obtained from an image displayed on the other display screen during the certain period.
  • the number of divisions in the scanning direction is determined for each display screen so as to be the same number.
  • the certain period is, for example, a period that is the least common multiple of the image update interval on one display screen and the image update interval on the other display screen.
  • the drawing apparatus alternately generates pixel data included in the divided region for one display screen and pixel data included in the divided region for the other display screen, and stores the pixel data in a buffer for storing pixel data. This enables drawing on a plurality of display screens.
  • FIG. 1 is a schematic configuration diagram of a drawing apparatus according to an embodiment.
  • the drawing apparatus 1 includes a coordinate conversion unit 2, a selection unit 3, an image generation unit 4, a line depth buffer 5, line buffers 6-1 and 6-2, and display circuits 7-1 and 7-2. Have. Each of these units included in the drawing apparatus 1 is implemented as, for example, a separate integrated circuit. Alternatively, the coordinate conversion unit 2, the selection unit 3, and the image generation unit 4 may be implemented as functional modules that are executed by one processor.
  • the drawing apparatus 1 is connected to the memory circuit 10 via, for example, a bus, and reads from the memory circuit 10 three-dimensional graphics data that is the basis of an image displayed on the display device 11 or the display device 12. Can do.
  • the image output from the display circuit 7-1 is displayed on the display device 11, while the image output from the display circuit 7-2 is displayed on the display device 12.
  • the drawing device 1 can be mounted on various devices that can display images on a plurality of display devices such as a computer.
  • FIG. 2 is a diagram showing an example of display screens of two display devices according to the present embodiment.
  • the number of scanning lines per screen that is, the number of pixels in the vertical direction is 12
  • the number of pixels of each scanning line that is, the number of pixels in the horizontal direction is 16.
  • the display screen 202 of the display device 12 the number of scanning lines per screen is six
  • the number of pixels of each scanning line is eight.
  • the display screens 201 and 202 both have a display update frequency, that is, a frame rate of 60 times / second.
  • the vertical synchronization signal for the display circuit 7-1 and the vertical synchronization signal for the display circuit 7-2 are input from the synchronization signal generation circuit (not shown) to each display circuit.
  • the synchronization signal generation circuit displays the vertical synchronization signal at the start of display of the display screen of the display device 12 at the same timing as the vertical synchronization signal at the start of display of the display screen of the display device 11 is input to the display circuit 7-1. Input to circuit 7-2.
  • the synchronization interval of one display screen of the two display devices 11 and 12 is an integral multiple of the synchronization interval of the other display screen.
  • the coordinate conversion unit 2 reads the coordinates of each vertex in the three-dimensional coordinate system of the three-dimensional figure read from the memory circuit 10 and displayed on the display device 11 or 12 in accordance with the drawing command stored in the memory circuit 10. Convert to coordinates in the two-dimensional coordinate system of the projection plane.
  • FIG. 3 is a functional block diagram of the coordinate conversion unit 2.
  • the coordinate conversion unit 2 includes a reading unit 21, a vertex coordinate conversion unit 22, a graphic information generation unit 23, and a removal unit 24.
  • the reading unit 21 reads a drawing command for generating an image to be displayed on each display device from the memory circuit 10.
  • FIG. 4 is a conceptual diagram of the memory circuit 10 that stores a drawing command for the display screen of each display device.
  • the memory circuit 10 has a drawing command 401 for a display screen of the display device 11 (hereinafter referred to as display screen A) and a display screen of the display device 12 (hereinafter referred to as display) in order from the lowest address number. (Designated as screen B) is stored.
  • the drawing commands 401 and 402 include an identification command 411 for identifying a target display screen and instructing drawing for each display screen, setting information 412, and graphic information 413 prepared for each graphic. It is.
  • the setting information includes, for example, the lighting conditions such as the size of the display screen, the rotation amount according to the viewpoint of the displayed graphic and the projection plane, the parallel movement amount, and the type and position of the light source.
  • the graphic information includes material information such as the three-dimensional coordinates of the vertex of the graphic, the reflectance of the surface, and texture information.
  • the figure may be a three-dimensional figure such as a rectangular parallelepiped, a triangular pyramid, or a cylinder, or a two-dimensional figure such as a triangle, a hexagon, or a straight line.
  • the reading unit 21 reads a drawing command for the display screen A, and the vertex coordinate conversion unit 22, the graphic information generation unit 23, and the removal unit 24 execute processing for the display screen A. Thereafter, the reading unit 21 reads a drawing command for the display screen B, and the vertex coordinate conversion unit 22, the graphic information generation unit 23, and the removal unit 24 execute processing for the display screen B. Note that the execution order of the drawing command for the display screen A and the drawing command for the display screen B may be reversed. Further, the reading unit 21 may alternately read various information included in the drawing command for the display screen A and various information included in the drawing command for the display screen B.
  • the vertex coordinate conversion unit 22 moves the coordinates of each vertex of the figure according to the rotation amount and the parallel movement amount indicated in the drawing command, and each vertex according to the viewpoint for the figure. Projection conversion processing for projecting the image onto the display screen. Thereby, the vertex coordinate conversion unit 22 obtains two-dimensional coordinates on the display screen of each vertex of each figure. Then, the vertex coordinate conversion unit 22 passes the two-dimensional coordinates of each vertex of each graphic to the graphic information generation unit 23.
  • the graphic information generation unit 23 generates graphic information representing a graphic on the display screen from the two-dimensional coordinates of each vertex of each graphic by the vertex coordinate conversion unit 22.
  • the figure on the display screen is, for example, a triangle.
  • the solid figure represented in the three-dimensional coordinate system is represented by a set of triangles on the display screen.
  • the graphic information includes, for example, the vertex number of each vertex included in the graphic on the display screen and position information indicating the two-dimensional coordinates of each vertex on the display screen.
  • the removal unit 24 removes graphic information of a graphic not drawn on the display screen from the graphic information generated by the graphic information generation unit 23. For example, the removing unit 24 performs clipping processing and culling processing on each piece of graphic information, thereby specifying a portion of the graphic that is not drawn on the display screen. For example, the removal unit 24 removes graphic information regarding a graphic outside the display area of the display screen by performing clipping processing on each graphic information. Further, the removal unit 24 performs culling processing on each piece of graphic information to determine the front and back of the graphic, and removes graphic information related to the graphic determined to be located on the back side. The drawing command may be set to display the back side of the figure. In this case, for example, the removal unit 24 adds front and back information such as a flag indicating that the graphic is located on the back side to the graphic information regarding the graphic located on the back side.
  • the removal unit 24 outputs the graphic information of the graphic displayed on the display screen and the drawing command to the selection unit 3.
  • the selection unit 3 divides an image displayed on the display screen of each display device into a plurality of divided regions. At that time, the selection unit 3 sets the number of divisions in the scanning direction (that is, the horizontal direction) of the display screen so that the number of divided areas obtained from images displayed during a certain period is the same between display devices. decide. And the selection part 3 selects the figure contained in the division area for every division area about each display apparatus.
  • FIG. 5 is a functional block diagram of the selection unit 3.
  • the selection unit 3 includes a drawing ratio calculation unit 31, a drawing area determination unit 32, a storage unit 33, and a read control unit 34.
  • the drawing ratio calculation unit 31 determines the number of divided areas obtained from images displayed in the same period between display devices based on the display screen size and the display screen frame rate included in the drawing command for each display screen.
  • the number of horizontal divisions of each display screen is calculated so as to be the same.
  • the number of horizontal divisions of each display screen is calculated by the following equation.
  • DNA and DNB are the number of horizontal divisions of display screen A and the number of horizontal divisions of display screen B, respectively.
  • HA is the vertical size of the display screen A, that is, the number of scanning lines of the display screen A
  • HB is the vertical size of the display screen B, that is, the number of scanning lines of the display screen B.
  • FRA and FRB are the frame rate of display screen A and the frame rate of display screen B, respectively.
  • the right side of equation (1) is calculated to be 1 ⁇ 2. Therefore, the display screen B is divided into two in the horizontal direction, and the display screen A is not divided.
  • the drawing ratio calculation unit 31 notifies the drawing area determination unit 32 and the read control unit 34 of the number of horizontal divisions for each display screen.
  • the drawing area determination unit 32 is an example of a division unit, and divides an image displayed on the display screen of each display device into a plurality of division areas according to the number of horizontal divisions of the display screen. Find the figure contained in.
  • the drawing area determination unit 32 divides the image displayed on each display screen in the vertical direction according to the number of scanning lines that can be simultaneously stored in the line depth buffer 5 and the line buffers 6-1 and 6-2. For example, when the line depth buffer 5 and the line buffers 6-1 and 6-2 can store data for one scanning line, the drawing area determination unit 32 sets different divided areas for each scanning line. Then, the drawing area determination unit 32 compares each vertex of the target graphic with the vertical coordinate of the divided area to identify the divided area including the target graphic. In other words, the drawing area determination unit 32 sets the target graphic to a divided area included between the vertex having the minimum vertical coordinate and the vertex having the maximum vertical coordinate among the vertices of the target graphic. Is determined to be included.
  • the line depth buffer 5 and the line buffers 6-1 and 6-2 may store data of a plurality of scanning lines.
  • the drawing area determination unit 32 divides the image displayed on each display screen in the vertical direction according to the number of scanning lines that can be stored in the line depth buffer 5 and the line buffers 6-1 and 6-2. . That is, the vertical size of the divided area corresponds to the number of scanning lines in which the line depth buffer 5 and the line buffers 6-1 and 6-2 can store data.
  • the drawing area determination unit 32 determines that the target graphic satisfies the following expression and is included in the divided area of interest.
  • Y min and Y max are the minimum vertical coordinate and the maximum vertical coordinate of the target graphic, respectively, and A min and A max are the minimum vertical coordinate and the maximum vertical coordinate of the target divided area, respectively. It is a direction coordinate. It is assumed that the vertical coordinate at the upper end of the display screen is 0, and the vertical coordinate increases as it goes downward. That is, the minimum vertical coordinate A min of the target divided area is smaller than the maximum vertical coordinate Y max of the target figure, and the maximum vertical coordinate A max of the target divided area is the minimum of the target figure. When it is larger than the vertical coordinate Y min , the target graphic is included in the divided area of interest.
  • the drawing area determination unit 32 divides the display screen A or the display screen B in the horizontal direction according to the result of the expression (1). Then, the drawing area determination unit 32 specifies, for each graphic, a divided area including the graphic. At that time, the drawing area determination unit 32 can determine whether or not the target graphic is included in the divided area by using a determination expression in which the vertical coordinate in the expression (2) is the horizontal coordinate.
  • the drawing area determination unit 32 adds information specifying a divided area including the graphic represented by the graphic information to each graphic information and stores the information in the storage unit 33.
  • FIG. 6 is a conceptual diagram of the storage unit 33 that stores drawing commands for each display screen.
  • a drawing command 601 for the display screen A and a drawing command 602 for the display screen B are stored in order from the lowest address number.
  • the drawing commands 601 and 602 differ from the drawing command shown in FIG. 4 in that range information 611 to 614 including the figure is added for each figure.
  • the coordinates of each vertex included in the graphic information are also two-dimensional coordinates on the display screen.
  • the read control unit 34 alternately reads the graphic information of each display screen from the storage unit 33 for each display screen and outputs it to the image generation unit 4. At that time, the read control unit 34 may read the graphic information from the storage unit 33 for each scanning line. Alternatively, the reading control unit 34 may read graphic information in tile units as disclosed in International Publication No. 2011/161723. In this case, the read control unit 34 outputs the graphic information and the drawing command included in the tile to the image generation unit 4 for each tile.
  • the read control unit 34 reads the graphic information for each divided region in the horizontal direction and outputs it to the image generation unit 4.
  • FIG. 7 is a diagram showing the order of graphic information read out by the read control unit 34.
  • the display screen A is not divided in the horizontal direction, and the display screen B is divided in two in the horizontal direction.
  • graphic information 701 included in the entire uppermost scanning line of the display screen A is read from the storage unit 33.
  • graphic information 702 included in the left half of the top scanning line of the display screen B is read from the storage unit 33.
  • graphic information 703 included in the entire second scanning line from the top of the display screen A is read from the storage unit 33.
  • graphic information 704 included in the right half of the uppermost scanning line of the display screen B is read from the storage unit 33. Thereafter, the same process is repeated up to the lower end of the display screen.
  • the line depth buffer 5 also stores pixel data of divided areas corresponding to each piece of graphic information in the order shown in FIG.
  • the graphic information included in the half of the scanning lines of the display screen B is input to the image generation unit 4 while the graphic information included in one scanning line of the display screen A is input to the image generation unit 4.
  • the image generation unit 4 generates an image to be displayed on each display device in units of divided regions based on the graphic information for each divided region input from the selection unit 3. Further, the image generation unit 4 calculates the storage address of the data for each pixel of the display screen A and the display screen B in the line depth buffer 5 according to the display screen information and the horizontal division information input from the selection unit 3. Then, the image generation unit 4 converts the data of each pixel having the depth information in the divided area for the display screen A and the data of each pixel having the depth information in the divided area for the display screen B into the line depth buffer 5. Are alternately stored at the calculated addresses.
  • the image generation unit 4 extracts only the data to be displayed on the display screen from the pixel data for each divided area stored in the line depth buffer 5 and stores it in the line buffer 6-1 or the line buffer 6-2. Then, every time pixel data of the entire scanning line is stored in any of the line buffers, the image generation unit 4 outputs the pixel data read from the line buffer 6-1 to the display circuit.
  • FIG. 8 is a functional block diagram of the image generation unit 4.
  • the image generation unit 4 includes a reading unit 41, a vertex coordinate conversion unit 42, a graphic information generation unit 43, a pixel affiliation determination unit 44, a pixel data generation unit 45, a removal unit 46, a buffer control unit 47, And a display data control unit 48.
  • the reading unit 41 reads a drawing command for generating an image to be displayed on each display device from the memory circuit 10. Then, the reading unit 41 passes the three-dimensional coordinates of the vertices of each graphic included in the drawing command to the vertex coordinate conversion unit 42.
  • the vertex coordinate conversion unit 42 moves the coordinates of each vertex of the figure according to the rotation amount and the parallel movement amount indicated in the drawing command, and each vertex according to the set viewpoint. Projection conversion processing for projecting the image onto the display screen. Thereby, the vertex coordinate conversion part 42 calculates
  • the vertex coordinate conversion unit 42 adjusts the brightness according to the illumination by the light source specified by the drawing command, calculates the color of each vertex, and calculates the normal vector of each figure for each vertex on the display screen. Processing such as calculation is performed. Further, the vertex coordinate conversion unit 42 may project and convert the three-dimensional coordinates representing the texture range to be pasted to each figure on the display screen, and obtain the coordinates representing the texture range on the display screen. . Then, the vertex coordinate conversion unit 42 passes information on each vertex of each graphic on the display screen to the graphic information generation unit 43.
  • the graphic information generation unit 43 generates graphic information on the display screen from the two-dimensional coordinates of each vertex of each graphic by the vertex coordinate conversion unit 42 as in the graphic information generation unit 23.
  • the graphic information generation unit 43 calculates an expression for each side from the coordinates of each vertex.
  • the graphic information includes, for example, the vertex number of each vertex included in the graphic and position information indicating the two-dimensional coordinates of each vertex on the display screen.
  • the graphic information includes information representing the expression of each side (for example, inclination and intercept), graphic color information, normal vector information, texture range information, and Z direction information (ie, depth). Information).
  • the information in the Z direction can be, for example, the coordinates in the Z direction in the coordinates of the points of the original figure in the three-dimensional coordinate system corresponding to each vertex.
  • the graphic information generation unit 43 outputs graphic information of each graphic on the two-dimensional coordinates to the pixel affiliation determination unit 44.
  • the pixel affiliation determination unit 44 identifies the graphic to which each pixel of the display screen belongs based on the graphic information of each graphic. One pixel may belong to a plurality of figures. Then, the pixel affiliation determination unit 44 passes information representing a graphic to which each pixel belongs to the pixel data generation unit 45.
  • the pixel data generation unit 45 calculates the luminance, color, and position of the corresponding graphic in the Z direction (ie, the depth direction) for each pixel included in the graphic. At that time, the pixel data generation unit 45 generates pixels based on information such as colors and textures included in the graphic information, and material information such as reflectance of the graphic and light source position information included in the drawing setting information. For each, the brightness and color are calculated. Then, the pixel data generation unit 45 passes information on each pixel included in the graphic to the buffer control unit 47 for each graphic.
  • the removal unit 46 removes pixel information that is not drawn on the display screen from the information of each pixel for each graphic calculated by the pixel data generation unit 45 for each divided region. For example, the removal unit 46 alternately outputs read requests for the divided area of the display screen A and the divided area of the display screen B to the buffer control unit 47. Alternatively, the removal unit 46 may output a read request for each pixel.
  • the buffer control unit 47 reads out the depth value that is stored in the line depth buffer 5 and represents the position in the depth direction of the pixel, and outputs the depth value to the removal unit 46.
  • the removing unit 46 identifies the pixel of the graphic located closest to the front and the pixels of the other graphic based on the depth value, Pixel information about a graphic other than the positioned graphic is removed. Note that pixel information remaining without being removed is pixel data included in the divided region to be drawn.
  • the removal unit 46 outputs the data of each pixel in the divided area to the buffer control unit 47.
  • the buffer control unit 47 Based on the display screen setting information included in the display command for each display screen and the horizontal division information calculated in the selection 3, the buffer control unit 47 obtains data of each pixel included in the divided area for each divided area. Calculate the stored address. Then, the buffer control unit 47 alternately stores the data of each pixel of the divided area for the display screen A and the data of each pixel of the divided area for the display screen B in the line depth buffer 5. At that time, the buffer control unit 47 stores the data of each pixel at the calculated address. Further, in response to a read request from the removal unit 46, the buffer control unit 47 reads the data of each pixel in the divided area stored from the line depth buffer 5 and passes it to the removal unit 46.
  • the address ADDR of the line depth buffer 5 in which the data of the pixel whose horizontal coordinate is XPOS is stored is expressed by the following equation.
  • XSIZEA is the horizontal size of the display screen A (that is, the number of pixels in the horizontal direction)
  • M is the number of horizontal divisions of the display screen A.
  • K is the horizontal division number of the display screen A for the pixel data of the display screen A
  • K is the horizontal division number of the display screen B for the pixel data of the display screen B
  • k is a number that changes one by one between 0 and (the number of horizontal divisions of the display screen A-1) for pixel data of the display screen A, and 0 to ( It is a number that changes one by one between the number of horizontal divisions of the display screen B-1).
  • D is a flag representing a display screen on which target pixel data is displayed.
  • P is the number of bytes of pixel data per pixel including information in the depth direction.
  • FIG. 9 is a diagram illustrating an example of pixel data of each divided region stored in the line depth buffer 5.
  • the display screen A is not divided in the horizontal direction, and one divided area includes data for one scanning line.
  • the display screen B is divided into two in the horizontal direction, one divided area includes data corresponding to half of the scanning lines.
  • the data 901 stored in the line depth buffer 5 first is pixel data corresponding to the uppermost scanning line of the display screen A and pixels corresponding to the left half of the uppermost scanning line of the display screen B. Contains data.
  • data 902 stored in the line depth buffer 5 includes pixel data corresponding to the second scanning line from the top of the display screen A and pixels corresponding to the right half of the uppermost scanning line of the display screen B. Contains data.
  • the third data 903 stored in the line depth buffer 5 corresponds to the pixel data corresponding to the third scanning line from the top of the display screen A and the left half of the second scanning line from the top of the display screen B. Pixel data is included.
  • the line depth buffer 5 stores pixel data of one divided area of the display screen A and pixel data of one divided area of the display screen B.
  • the pixel data of the display screen A is stored at addresses 0 to (XSIZEA * P-1), and the pixel data of the display screen B is stored after the address XSIZE * P. .
  • the buffer control unit 47 stores the data of each pixel in the divided area of the display screen A obtained by the removal unit 46 at a corresponding address of the line buffer 6-1. Similarly, the buffer control unit 47 stores the data of each pixel in the divided area of the display screen B obtained by the removal unit 46 at the corresponding address of the line buffer 6-2.
  • the address ADDRA where each pixel data of the display screen A is stored and each of the display screen B are stored.
  • the address ADDRB where the pixel data is stored is calculated by the following equation.
  • XPOS is the horizontal coordinate of the pixel of interest
  • Q is the number of bytes of pixel data per pixel. Since the line buffers 6-1 and 6-2 do not need to store data in the depth direction, Q is smaller than P.
  • the buffer control unit 47 stores the rightmost pixel data of the previous divided area for the second and subsequent divided areas in the horizontal direction. It is only necessary to start writing pixel data from the address next to the address.
  • the buffer control unit 47 When the buffer control unit 47 finishes writing the pixel data for one scanning line in the line buffer 6-1, the buffer control unit 47 notifies the display data control unit 48 of a write completion signal indicating that. Similarly, when the writing of pixel data for one scanning line is finished in the line buffer 6-2, the buffer control unit 47 notifies the display data control unit 48 of a writing completion signal indicating that.
  • the display data control unit 48 reads pixel data from the line buffer 6-1 and outputs it to the display circuit 7-1 each time it receives a write completion signal for the line buffer 6-1 from the buffer control unit 47. Similarly, each time the display data control unit 48 receives a write completion signal for the line buffer 6-2 from the buffer control unit 47, it reads out the pixel data from the line buffer 6-2 and outputs it to the display circuit 7-2. .
  • the display data control unit 48 may alternately read the pixel data from each line buffer. Good.
  • the display data control unit 48 may alternately read pixel units in accordance with the ratio between the horizontal size of the divided area of the display screen A and the horizontal size of the divided area of the display screen B.
  • the number of pixels included in the pixel group is obtained by the following equation.
  • DA and DB are the number of horizontal divisions of display screen A and the number of horizontal divisions of display screen B, respectively.
  • XSIZEA and XSIZEB are the horizontal size of display screen A and horizontal size of display screen B, respectively.
  • GA and GB are the number of pixels included in the pixel group read at a time for the display screen A and the number of pixels included in the pixel group read at a time for the display screen B, respectively.
  • the display data control unit 48 When the display data control unit 48 alternately reads out pixel data in units of pixels, the amount of pixel data temporarily held in the display circuit 7-1 and the display circuit 7-2 can be reduced. 1 and the buffer in the display circuit 7-2 can be reduced.
  • the line depth buffer 5 is an example of a buffer that stores pixel data included in an image displayed on the display screen of each display device.
  • the line depth buffer 5 includes at least data including depth information of each pixel included in at least one divided area of the display screen A and depth information of each pixel included in at least one divided area of the display screen B.
  • It is a memory circuit having a capacity capable of storing data including it. Note that when one divided region includes a plurality of scanning lines, the line depth buffer 5 also has a capacity capable of storing pixel data of each scanning line included in the divided regions.
  • the line depth buffer 5 may have a memory capacity capable of storing pixel data of the entire number of scanning lines that is the same as the number of scanning lines included in the divided area for both the display screen A and the display screen B. . However, the memory capacity of the line depth buffer 5 may be smaller than the memory capacity for storing the pixel data of the entire smaller one of the display screen A and the display screen B.
  • the line buffer 6-1 and the line buffer 6-2 are other examples of buffers that store pixel data included in an image displayed on the display screen of each display device.
  • the line buffer 6-1 is a memory circuit that stores pixel data of an image displayed on the display device 11.
  • the line buffer 6-2 is a memory circuit that stores pixel data of an image displayed on the display device 12.
  • the line buffer 6-1 has at least a memory capacity for storing data of each pixel included in one scanning line of the image data displayed on the display screen A.
  • the line buffer 6-2 has at least a memory capacity for storing data of each pixel included in one scanning line in the image data displayed on the display screen B.
  • the display circuit 7-1 displays the pixel data received from the image generation unit 4 on the display device 11.
  • the display circuit 7-2 displays the pixel data received from the image generation unit 4 on the display device 12.
  • FIG. 10 is an operation flowchart of a drawing process executed by the drawing apparatus 1.
  • the vertex coordinate conversion unit 22 of the coordinate conversion unit 2 projects and converts the three-dimensional coordinates of each vertex of the three-dimensional figure to be displayed on each display screen included in the drawing command for each display screen. Conversion into dimensional coordinates (step S101).
  • the graphic information generation unit 23 of the coordinate conversion unit 2 obtains graphic information representing graphic information displayed from each vertex on the display screen for each display screen (step S102).
  • the drawing ratio calculation unit 31 of the selection unit 3 ensures that the number of divided areas obtained from images displayed in the same period is the same between the display screens.
  • the number of horizontal divisions on each display screen is calculated (step S103).
  • the drawing area determination unit 32 of the selection unit 3 specifies, for each piece of graphic information, a divided region that includes the graphic represented by the graphic information (step S104).
  • the vertex coordinate conversion unit 42 of the image generation unit 4 projects and converts the three-dimensional coordinates of each vertex of the three-dimensional figure to be displayed on each display screen included in the drawing command for each display screen. Conversion into dimensional coordinates is performed (step S105). Then, the graphic information generating unit 43 of the image generating unit 4 obtains graphic information representing the graphic information displayed from each vertex on the display screen for each display screen (step S106).
  • the pixel affiliation determination unit 44 of the image generation unit 4 specifies the graphic to which each pixel belongs for each divided area of each display screen based on the graphic information of each graphic (step S107). Then, the pixel data generation unit 45 of the image generation unit 4 calculates pixel data such as the luminance and color of each pixel included in the graphic for each divided area of each display screen (step S108).
  • the buffer control unit 47 of the image generation unit 4 calculates, for each divided area of each display screen, an address where the data of each pixel included in the divided area is stored (step S109). Then, the buffer control unit 47 alternately receives the data of each pixel of the divided area of the display screen A and the pixel data of the divided area of the display screen B received from the pixel data generating unit 45 at the corresponding addresses of the line depth buffer 5. (Step S110).
  • the removal unit 46 of the image generation unit 4 removes pixel data not drawn on the display screen from the data of each pixel for each figure for each divided region of each display screen (step S111). Then, the buffer control unit 47 stores the data of each pixel received from the removal unit 46 at the corresponding address of the line buffer 6-1 or 6-2 (step S112).
  • Step S113 the drawing apparatus 1 ends the drawing process.
  • the drawing apparatus the number of divided areas obtained by dividing each image displayed within a certain period for each of the plurality of display screens is the same between the display screens. As described above, the number of horizontal divisions in each display screen is determined. Further, the drawing apparatus alternately stores pixel data of one divided region for one display screen and pixel data of one divided region for the other display screen in a line depth buffer. Therefore, this drawing device can draw an image on a plurality of display devices using a line depth buffer and a line buffer having a memory capacity smaller than the size of the display screen.
  • the aspect ratio of the display screen A and the aspect ratio of the display screen B may not be an integral multiple.
  • FIG. 11 is a diagram showing an example in which the aspect ratio of the display screen of one display device is not an integer multiple of the aspect ratio of the display screen of the other display device.
  • the number of scanning lines per screen is 12, and the number of pixels of each scanning line, that is, the number of pixels in the horizontal direction is 16.
  • the display screen 1102 (display screen B) of the display device 12 the number of scanning lines per screen is 8, and the number of pixels of each scanning line, that is, the number of pixels in the horizontal direction is 8.
  • the frame rate of the display screen 1101 is 30 times / second
  • the frame rate of the display screen 1102 is 60 times / second.
  • the right side is 3/4 from the equation (1). Therefore, the number of divisions in the horizontal direction is 4 for the display screen A, and the number of divisions in the horizontal direction is 3 for the display screen B. Therefore, the image displayed on the display screen A is divided into divided areas 1 to 4 for each scanning line, and the image displayed on the display screen B is divided into divided areas 1 to 3 for each scanning line. It is divided into.
  • FIG. 12 is a diagram showing the order of the divided areas stored in the line depth buffer 5 in the example shown in FIG.
  • the display screen A is divided into four in the horizontal direction, and the display screen B is divided into three in the horizontal direction. Therefore, first, the pixel data 1201 included in the divided area 1 of the scanning line on the top of the display screen A is stored in the line depth buffer 5. Next, pixel data 1202 included in the divided area 1 of the scanning line on the top of the display screen B is stored in the line depth buffer 5. Third, pixel data 1203 included in the divided region 2 of the uppermost scanning line on the display screen A is stored in the line depth buffer 5. Fourth, pixel data 1204 included in the divided region 2 of the uppermost scanning line on the display screen B is stored in the line depth buffer 5. Thus, the pixel data of the divided area of the display screen A and the pixel data of the divided area of the display screen B are alternately stored in the line depth buffer 5.
  • the line depth buffer 5 may have a capacity capable of storing pixel data corresponding to the sum of the horizontal size of the display screen A and the horizontal size of the display screen B.
  • the buffer control unit 47 finishes writing the pixel data for one scanning line for the display screen A or the display screen B, it passes the pixel data for one scanning line to the removal unit 46. May be. Then, the removal unit 46 may write pixel data for one scanning line into the line buffer 6-1 or 6-2.
  • the pixel data of the image displayed on each display screen may be created by a method other than the above embodiment.
  • the pixel data generation unit 45 may create pixel data based on, for example, two-dimensional graphics data or image information such as a photograph.
  • either the line depth buffer or the line buffer may be omitted.
  • the buffer control unit 47 may store each pixel data of the display screen A at the address calculated by the equation (4) of the line buffer 6-1.
  • the buffer control unit 47 may store each pixel data of the display screen B at the address calculated by the equation (4) of the line buffer 6-2.
  • the buffer control unit 47 may store the pixel data of the divided area of the display screen A and the pixel data of the divided area of the display screen B alternately in the line buffer.
  • the computer program capable of executing the functions of the coordinate conversion unit 2, the selection unit 3, and the image generation unit 4 of the drawing apparatus 1 on the processor is recorded on a computer-readable medium such as a magnetic recording medium or an optical recording medium. It may be provided in the form. However, such a recording medium does not include a carrier wave.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

　La présente invention a pour but de fournir un dispositif de dessin au moyen duquel il est possible de dessiner une image sur une pluralité d'écrans d'affichage à l'aide d'une mémoire ayant une petite capacité de mémoire. Un dispositif de dessin (1), selon l'invention, possède : des tampons (6-1, 6-2) pour stocker une partie des données d'une image affichée sur un premier dispositif d'affichage (11) et une partie des données d'une image affichée sur un second dispositif d'affichage (12) ; une unité de calcul de rapport de dessin (31) pour calculer le nombre de divisions dans la direction de balayage des première et seconde unités d'affichage de telle sorte que le nombre de premières zones divisées, obtenues par division de l'image affichée sur le premier dispositif d'affichage en une pluralité de zones pendant une période prescrite, et le nombre de secondes zones divisées, obtenues par division de l'image affichée sur le second dispositif d'affichage en une pluralité de zones pendant une période prescrite, sont égaux ; une unité de division pour diviser l'image affichée sur le premier dispositif d'affichage et l'image affichée sur le second dispositif d'affichage conformément au nombre calculé de divisions ; une unité de commande de tampon (47) pour stocker les données de chacune des images divisées alternativement dans les tampons.
PCT/JP2014/063090 2014-05-16 2014-05-16 Dispositif de dessin, procédé de dessin et programme d'ordinateur pour dessiner WO2015173954A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022125166A (ja) * 2018-02-08 2022-08-26 株式会社ソシオネクスト 画像処理装置、画像処理方法及び画像表示システム

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63188226A (ja) * 1987-01-31 1988-08-03 Toshiba Corp ２画面表示システム
JPH04269087A (ja) * 1991-02-25 1992-09-25 Nippon Telegr & Teleph Corp <Ntt> ビデオライブラリシステム
JPH06118918A (ja) * 1992-10-08 1994-04-28 Fujitsu Ltd 表示信号出力回路
JP2005292677A (ja) * 2004-04-05 2005-10-20 Matsushita Electric Ind Co Ltd 表示制御装置および表示制御方法
JP2005326461A (ja) * 2004-05-12 2005-11-24 Casio Comput Co Ltd 表示装置及びその駆動制御方法
JP2011095566A (ja) * 2009-10-30 2011-05-12 Yamaha Corp 画像プロセッサの制御方法およびプログラム
JP2013072913A (ja) * 2011-09-27 2013-04-22 Nec Embedded Products Ltd 画像処理システム

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63188226A (ja) * 1987-01-31 1988-08-03 Toshiba Corp ２画面表示システム
JPH04269087A (ja) * 1991-02-25 1992-09-25 Nippon Telegr & Teleph Corp <Ntt> ビデオライブラリシステム
JPH06118918A (ja) * 1992-10-08 1994-04-28 Fujitsu Ltd 表示信号出力回路
JP2005292677A (ja) * 2004-04-05 2005-10-20 Matsushita Electric Ind Co Ltd 表示制御装置および表示制御方法
JP2005326461A (ja) * 2004-05-12 2005-11-24 Casio Comput Co Ltd 表示装置及びその駆動制御方法
JP2011095566A (ja) * 2009-10-30 2011-05-12 Yamaha Corp 画像プロセッサの制御方法およびプログラム
JP2013072913A (ja) * 2011-09-27 2013-04-22 Nec Embedded Products Ltd 画像処理システム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022125166A (ja) * 2018-02-08 2022-08-26 株式会社ソシオネクスト 画像処理装置、画像処理方法及び画像表示システム
JP7294507B2 (ja) 2018-02-08 2023-06-20 株式会社ソシオネクスト 画像処理装置、画像処理方法及び画像表示システム

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