JP2010286906A - Graphics processor, graphics processing method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a processing load without reducing visibility, when arranging and drawing two-dimensional graphics in a three-dimensional virtual space. <P>SOLUTION: A two-dimensional graphics drawing command acquiring part 202 obtains a two-dimensional graphics drawing command, from a graphics processing command, a two-dimensional graphics arrangement information acquiring part 203 obtains two-dimensional graphics arrangement information, and a projection condition acquiring part 204 obtains a projection condition. A visual effect calculating part 205 calculates a visual effect based on a position of a point of view in the three-dimensional virtual space for arranging the two-dimensional graphics, based on the obtained two-dimensional graphics arrangement information, and information about the obtained projection condition. A two-dimensional graphics drawing executing part 206 executes the two-dimensional graphics drawing command in response to the calculated visual effect, and generates a raster image. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a graphics processing device and a graphics processing method for processing an input graphics processing instruction, and a program for causing a computer to execute the graphics processing method.

  Conventionally, it has been common to use a technique called texture mapping as a method of drawing processing by arranging two-dimensional graphics in a three-dimensional virtual space. This texture mapping performs rendering processing as if a raster image is pasted on the surface of the three-dimensional object in the three-dimensional virtual space, and is mainly used to express the texture of the three-dimensional object. .

  In recent years, by implementing hardware specializing in texture mapping processing, it has become possible to perform three-dimensional graphics processing at high speed. In general, in the rendering process of a three-dimensional object, a hidden surface removal process is performed by a Z-buffer method or the like so that a portion of the three-dimensional object that cannot be seen by other objects or faces is not drawn. Further, conventionally, there has been proposed a method for enabling a still image and a moving image to be handled without distinction using a drawing apparatus that supports only a still image texture (see, for example, Patent Document 1 below).

JP-A-11-53565

  Here, a case where the two-dimensional graphics arranged in the three-dimensional virtual space includes an animation whose contents change with the passage of time will be described. In this case, according to the conventional method, for example, it is necessary to repeatedly perform processing of pasting and rendering bitmap data generated by two-dimensional graphics drawing processing as a texture on the surface of a three-dimensional object.

  However, in the case of the conventional method, the two-dimensional graphics drawing processing needs to generate a texture image even on a surface that is not rendered by the hidden surface processing of the three-dimensional object. Therefore, when processing complex 2D graphics or when processing multiple 2D graphics, the load of 2D graphics rendering processing increases. As a result, there is a problem that the animation does not move smoothly and a so-called frame drop phenomenon occurs.

  The present invention has been made in view of such a problem, and when processing a drawing by arranging two-dimensional graphics in a three-dimensional virtual space, the processing load can be reduced without reducing visibility. The purpose is to make it possible.

A graphics processing apparatus according to the present invention is a graphics processing apparatus for processing an inputted graphics processing instruction, and obtains a two-dimensional graphics drawing processing instruction from the graphics processing instruction. A processing command acquisition means, a two-dimensional graphics arrangement information acquisition means for acquiring two-dimensional graphics arrangement information related to the arrangement of two-dimensional graphics from the graphics processing instruction, and a projection condition from the graphics processing instruction. Based on the projection condition acquisition means for acquiring information, the two-dimensional graphics arrangement information and the information on the projection condition, a visual effect based on the position of the viewpoint in the three-dimensional virtual space in which the two-dimensional graphics are arranged is calculated. Visual effect calculating means for performing the two-dimensional grouping according to the visual effect. Run the fix drawing commands, and a 2-dimensional graphics drawing processing execution means for executing processing for generating a raster image.
The present invention also includes a graphics processing method by the above-described graphics processing apparatus and a program for causing a computer to execute the graphics processing method.

  According to the present invention, when a two-dimensional graphic is arranged in a three-dimensional virtual space and a drawing process is performed, a reduction in processing load can be realized without reducing visibility. In particular, when the two-dimensional graphics changes over time, it is possible to realize a further reduction in processing load.

1 is a block diagram illustrating an example of a hardware configuration of a graphics processing device according to a first embodiment of the present invention. It is a block diagram which shows an example of a function structure of the graphics processing apparatus which concerns on the 1st Embodiment of this invention. It is a flowchart which shows an example of the process sequence of the graphics processing method by the graphics processing apparatus which concerns on the 1st Embodiment of this invention. FIG. 3 is a schematic diagram illustrating an example of a graphics processing command received by a graphics processing command receiving unit in FIG. 2 according to the first embodiment of this invention. FIG. 5 is a schematic diagram for explaining the concept of the parallel projection method shown in the projection condition of FIG. 4A according to the first embodiment of the present invention. FIG. 3 is a schematic diagram illustrating calculation of a visual recognition effect by the visual effect calculation unit of FIG. 2 according to the first embodiment of this invention. 4 is a flowchart illustrating an example of detailed processing of drawing processing in step S306 of FIG. 3 according to the first embodiment of this invention. It is a schematic diagram which shows an example of the process result of the drawing process in step S306 of FIG. It is a schematic diagram for illustrating the visual recognition effect according to the second embodiment of the present invention. It is a flowchart which shows the 2nd Embodiment of this invention and shows an example of the detailed process of the drawing process in FIG.3 S306. It is the schematic diagram explaining the concept of the anti-aliasing process. It is a block diagram which shows an example of a function structure of the graphics processing apparatus which concerns on the 3rd Embodiment of this invention. It is a flowchart which shows an example of the process sequence of the graphics processing method by the graphics processing apparatus which concerns on the 3rd Embodiment of this invention. FIG. 13 is a schematic diagram illustrating an example of a graphics processing command received by the graphics processing command receiving unit in FIG. 12 according to the third embodiment of this invention. FIG. 14 is a schematic diagram for explaining the processing contents of steps S1305 and S1306 in FIG. 13 according to the third embodiment of the present invention. FIG. 14 is a schematic diagram for explaining a processing content of step S1307 in FIG. 13 according to the third embodiment of this invention. It is a flowchart which shows the 3rd Embodiment of this invention and shows an example of the detailed process of the drawing process in FIG.13 S1307. It is a schematic diagram which shows the 3rd Embodiment of this invention and shows an example of the process result of the drawing process in step S1307 of FIG. FIG. 14 is a schematic diagram illustrating an example of a processing result of a drawing process in step S1308 of FIG. 13 according to the third embodiment of this invention.

  Hereinafter, embodiments (embodiments) for carrying out the present invention will be described with reference to the drawings.

(First embodiment)
First, a first embodiment of the present invention will be described.

  FIG. 1 is a block diagram showing an example of a hardware configuration of the graphics processing apparatus according to the first embodiment of the present invention.

  1 has a hardware configuration of a CPU 101, a RAM 102, a ROM 103, an external memory 104, an input device 105, a display unit 106, a communication interface (communication I / F) 107, and a bus 108. It is configured.

  The CPU 101 controls the entire graphics processing apparatus 100 using, for example, programs and data stored in the ROM 103 or the external memory 104.

  The RAM 102 includes SDRAM, DRAM, and the like, and includes an area for temporarily storing programs and data loaded from the ROM 103 or the external memory 104 and a work area necessary for the CPU 101 to perform various processes. .

  The ROM 103 stores information such as programs that do not need to be changed and various parameters.

  The external memory 104 stores, for example, an operating system (OS), a program executed by the CPU, and information known in the description of the present embodiment.

  The input device 105 includes, for example, a mouse, a keyboard, and the like. The input device 105 is operated when a user gives various instructions to the graphics processing apparatus 100 and inputs the instructions to the CPU 101 or the like.

  The display unit 106 includes, for example, a monitor and outputs a display screen (display image) drawn by the program to the monitor based on the control of the CPU 101.

  The communication I / F 107 controls transmission / reception of various information and data performed between the graphics processing apparatus 100 and an external apparatus.

  The bus 108 connects the CPU 101, the RAM 102, the ROM 103, the external memory 104, the input device 105, the display unit 106, and the communication I / F 107 so that they can communicate with each other.

Next, a functional configuration of the graphics processing apparatus 100 will be described.
FIG. 2 is a block diagram showing an example of a functional configuration of the graphics processing apparatus according to the first embodiment of the present invention. In FIG. 2, the same functional components as those in FIG. 1 are denoted by the same reference numerals, and the graphics processing device shown in FIG. 2 is described as “graphics processing device 100-1”. .

  2 has a functional configuration of a graphics processing command receiving unit 201, a two-dimensional graphics drawing processing command acquiring unit 202, a two-dimensional graphics arrangement information acquiring unit 203, and a projection condition acquiring unit 204. It is configured. Furthermore, the graphics processing apparatus 100-1 in FIG. 2 has a functional configuration of a visual effect calculation unit 205, a two-dimensional graphics drawing processing execution unit 206, a three-dimensional graphics drawing unit 207, and a display unit (monitor) 106. Configured.

  The graphics processing command receiving unit 201 in FIG. 2 includes, for example, a program stored in the CPU 101 and the ROM 103 or the external memory 104 shown in FIG. 1, and the input device 105 or the communication I / F 107. 2 includes, for example, programs stored in the CPU 101 and the ROM 103 or the external memory 104 shown in FIG.

  The graphics processing apparatus 100-1 receives a graphics processing command and outputs the result of the graphics processing to the display unit 106. Here, the 2D graphics rendering processing command is called by executing a program based on information input via the input device 105 or the communication I / F 107, for example.

  The graphics processing command receiving unit 201 performs processing for receiving a graphics processing command based on information input to the graphics processing device 100-1.

  The two-dimensional graphics drawing processing command acquisition unit 202 performs processing for acquiring a two-dimensional graphics drawing processing command from the graphics processing command received by the graphics processing command receiving unit 201. The two-dimensional graphics arrangement information acquisition unit 203 performs processing for acquiring two-dimensional graphics arrangement information related to the arrangement of the two-dimensional graphics from the graphics processing command received by the graphics processing command reception unit 201. The projection condition acquisition unit 204 performs processing for acquiring information related to the projection condition from the graphics processing command received by the graphics processing command receiving unit 201.

  The visual effect calculation unit 205 performs processing for calculating the visual effect based on the two-dimensional graphics arrangement information acquired by the two-dimensional graphics arrangement information acquisition unit 203 and information on the projection conditions acquired by the projection condition acquisition unit 204. Do. Specifically, the visual effect calculation unit 205 calculates the visual effect based on the position of the viewpoint in the three-dimensional virtual space where the two-dimensional graphics are arranged.

  The two-dimensional graphics drawing processing execution unit 206 executes the two-dimensional graphics drawing processing command acquired by the two-dimensional graphics drawing processing command acquisition unit 202 according to the visual recognition effect calculated by the visual effect calculation unit 205, Processing for generating a raster image is performed.

  The 3D graphics drawing unit 207 arranges the raster image generated by the 2D graphics drawing processing execution unit 206 based on the 2D graphics arrangement information in the 3D virtual space, and performs the projection drawing process according to the projection conditions. .

Next, a processing procedure of a graphics processing method by the graphics processing apparatus 100-1 will be described.
FIG. 3 is a flowchart showing an example of a processing procedure of the graphics processing method by the graphics processing apparatus according to the first embodiment of the present invention.

  First, in step S301, the graphics processing command receiving unit 201 performs processing for receiving a graphics processing command based on information input to the graphics processing device 100-1.

Here, the graphics processing instruction of this embodiment will be described.
FIG. 4 is a schematic diagram illustrating an example of a graphics processing command received by the graphics processing command receiving unit 201 in FIG. 2 according to the first embodiment of this invention.

  FIG. 4A shows a two-dimensional graphics rendering processing instruction 410, two-dimensional graphics arrangement information 420, and a projection condition 430 included in the graphics processing instruction. In FIG. 4A, a first graphics processing instruction 401, a second graphics processing instruction 402, which are vector graphics drawing instructions for drawing a circle as the two-dimensional graphics drawing processing instruction 410, A third graphics processing instruction 403 is shown.

  FIG. 4B shows a circle drawing processing command in the two-dimensional graphics drawing processing command 410 of FIG. Here, the circle drawing processing command draws a circle having a radius of 3 at the center of the background bitmap image with respect to the white background bitmap image having a width of 6 and a height of 6, as shown in FIG. It is processing.

  In addition, as the two-dimensional graphics arrangement information 420 in FIG. 4A, the normal vector of the plane in the three-dimensional virtual space to be arranged, the coordinate range, and the point through which the plane passes are specified. Also, as the projection condition 430 in FIG. 4A, a viewpoint condition, a projection plane condition, and a projection method thereof are defined. Here, the direction of the normal vector indicates a plane table.

  FIG. 5 is a schematic diagram for explaining the concept of the parallel projection method shown in the projection condition 430 of FIG. 4A according to the first embodiment of the present invention. Specifically, FIG. 5 shows the concept of the coordinate system, the viewpoint position, the projection plane position, and the parallel projection method in this embodiment based on the example of the graphics processing command shown in FIG. Has been. In the projection onto the XY plane by the parallel projection method, an arbitrary point (p, q, r) is projected onto the point (p, q, 0) on the XY plane regardless of the perspective to the position of the viewpoint.

Here, it returns to description of FIG. 3 again.
When the process of step S301 ends, in step S302, the two-dimensional graphics drawing processing command acquisition unit 202 performs processing for acquiring a two-dimensional graphics drawing processing command from the graphics processing command received in step S301. Do.

  Subsequently, in step S303, the two-dimensional graphics arrangement information acquisition unit 203 performs processing for acquiring two-dimensional graphics arrangement information related to the arrangement of the two-dimensional graphics from the graphics processing command received in step S301.

  Subsequently, in step S304, the projection condition acquisition unit 204 performs processing for acquiring information related to the projection condition from the graphics processing command received in step S301.

  Subsequently, in step S305, the visual effect calculation unit 205 determines whether the visual effect is visible or invisible based on the two-dimensional graphics arrangement information acquired in step S303 and the information regarding the projection condition acquired in step S304. A calculation process for determination is performed.

Here, the calculation of the visual effect by the visual effect calculation unit 205 will be described in more detail.
Visible or invisible can be classified according to whether a plane table is visible from the viewpoint position. That is, the inner product of the normal vector of the plane in the three-dimensional virtual space where the two-dimensional graphics are arranged and the unit vector (0, 0, 1) in the positive direction of the Z axis is calculated, and visible if the inner product is negative. If it is 0 or positive, it is determined as invisible.

  FIG. 6 is a schematic diagram for explaining the calculation of the visual effect by the visual effect calculation unit 205 of FIG. 2 according to the first embodiment of this invention. Specifically, FIG. 6A to FIG. 6C show the Y-axis about the positional relationship between the two-dimensional graphics arrangement information 420 of the graphic processing command shown in FIG. It is the figure seen from the positive direction. At this time, since the projection plane is the XY plane in any case, it overlaps with the X axis. In addition, since all the planes indicated by the two-dimensional graphics arrangement information 420 are planes parallel to the Y axis, they are line segments as shown in FIG. 6 when viewed from the Y axis direction.

  FIG. 6A illustrates the first graphics processing instruction 401 in FIG. The normal vector information of the first graphics processing instruction 401 is (0, 0, −1) as shown in FIG. In this case, the visual recognition effect calculation unit 205 calculates the inner product of the acquired normal vector (0, 0, −1) and the unit vector (0, 0, 1) in the positive direction of the Z axis. In this case, since the calculation result is −1 and negative, it is determined to be visible.

  FIG. 6B illustrates the second graphics processing instruction 402 in FIG. The normal vector information of the second graphics processing instruction 402 is (−1, 0, 1) as shown in FIG. 4. In this case, the visual recognition effect calculation unit 205 calculates the inner product of the acquired normal vector (-1, 0, 1) and the unit vector (0, 0, 1) in the positive direction of the Z axis. In this case, since the calculation result is 1 and positive, it is determined as invisible.

  FIG. 6C illustrates the third graphics processing instruction 403 in FIG. The normal vector information of the third graphics processing instruction 403 is (−0.866, 0, −0.5) as shown in FIG. In this case, the visual recognition effect calculation unit 205 calculates the inner product of the acquired normal vector (−0.866, 0, −0.5) and the unit vector (0, 0, 1) in the positive direction of the Z axis. To do. In this case, since the calculation result is −0.5 and negative, it is determined to be visible.

Here, it returns to description of FIG. 3 again.
When the process of step S305 ends, the process proceeds to step S306.
In step S306, first, the two-dimensional graphics drawing processing execution unit 206 executes the two-dimensional graphics drawing processing command acquired in step S302 according to the determination result of visible or invisible in step S305. The raster image is generated. Next, the 3D graphics drawing unit 207 arranges the raster image generated by the 2D graphics drawing processing execution unit 206 based on the 2D graphics arrangement information in the 3D virtual space, and projects the projection according to the projection conditions. Process.

  Subsequently, in step S307, the graphics processing device 100-1 (for example, the graphics processing command receiving unit 201) determines whether or not the processing of the graphics processing command to be processed has ended.

  If the result of the determination in step S307 is that processing of the processing target graphics processing instruction has not ended (there is an unprocessed graphics processing instruction), the process returns to step S301, and the unprocessed graphics processing instruction Perform processing for.

  On the other hand, as a result of the determination in step S307, when the processing of the graphics processing instruction to be processed is completed, the processing of the flowchart in FIG.

Next, details of the processing in step S306 in FIG. 3 will be described.
FIG. 7 is a flowchart illustrating an example of detailed processing of the drawing processing in step S306 of FIG. 3 according to the first embodiment of this invention.

  First, in step S701, the two-dimensional graphics drawing process execution unit 206 determines whether the result of the visual effect calculation process in step S305 is visible. If the result of determination in step S701 is that it is not visible (invisible), the processing in the flowchart of FIG. 7 ends.

On the other hand, if it is determined in step S701 that it is visible, the process proceeds to step S702.
In step S702, the two-dimensional graphics drawing processing execution unit 206 executes the two-dimensional graphics drawing processing command acquired in step S302 to generate a raster image (bitmap image).

  Subsequently, in step S703, the three-dimensional graphics drawing unit 207 arranges the raster image (bitmap image) generated in step S702 in the three-dimensional virtual space, and performs projection drawing processing. Thereafter, the processing in the flowchart of FIG.

  FIG. 8 is a schematic diagram showing an example of the processing result of the drawing process in step S306 of FIG.

  Here, regarding the first graphics processing instruction 401 in FIG. 4A, a bitmap image as shown in FIG. 4B is generated by performing a circle drawing process. In this case, the generated bitmap image is arranged at the position shown in FIG. The result of projecting this onto the projection plane, ie, the XY plane, is as shown in FIG.

  Further, the second graphics processing instruction 402 in FIG. 4A is not output as shown in FIG. 8B because the circle drawing process is not performed and the projection and drawing processes are not performed.

  In addition, with respect to the third graphics processing instruction 403 in FIG. 4A, a bitmap as shown in FIG. 4B is obtained by performing a circle drawing process in the same manner as the first graphics processing instruction 401. An image is generated. In this case, the generated bitmap image is arranged at the position shown in FIG. The result of projecting this onto the projection plane, that is, the XY plane, is as shown in FIG.

  Through the above processing, the two-dimensional graphics are arranged and projected in the three-dimensional virtual space, and the output of the rendered result is completed. In the present embodiment, only the parallel projection method has been described as the projection condition. However, the present invention is not limited to this, and for example, a perspective projection method may be used.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.
The hardware configuration of the graphics processing apparatus according to the second embodiment is the same as the hardware configuration of the graphics processing apparatus according to the first embodiment shown in FIG. The functional configuration of the graphics processing apparatus according to the second embodiment is the same as the functional configuration of the graphics processing apparatus according to the first embodiment shown in FIG.

  In the first embodiment, the example in which the visual effect is calculated by the visual effect calculation unit 205 in FIG. 2 is classified into two types, visible and invisible. In the second embodiment, a method of calculating an angle θ formed by a normal vector and a line-of-sight vector of a surface on which two-dimensional graphics are arranged as a visual recognition effect will be described. Specifically, in the second embodiment, the processing contents of the visual effect calculation unit 205 shown in FIG. 2 and the processing of the two-dimensional graphics rendering processing execution unit 206 based on the change of the processing content of the visual effect calculation unit 205 are as follows. Different from the first embodiment.

  In the parallel projection method, the line-of-sight vector is a vector perpendicular to the projection plane from the viewpoint position toward the projection plane. In general, the plane in the three-dimensional virtual space is less visible as it is closer to the line-of-sight vector, and the plane near the vertical is easier to see.

  FIG. 9 shows a second embodiment of the present invention and is a schematic diagram for explaining the visual recognition effect. Specifically, FIG. 9 shows a case where the same graphics is pasted and drawn on each surface of the cube. The cube surface 901 is easier to see because it is nearer to the line-of-sight vector than the cube surface 902 and the cube surface 903.

  An example of the processing procedure of the graphics processing method by the graphics processing apparatus according to the second embodiment of the present invention will be described with reference to the flowchart of FIG.

  First, in the second embodiment, the processes in steps S301 to S304 in the first embodiment are performed. Since the processing in steps S301 to S304 is the same as that in the first embodiment, the description thereof is omitted. 4 to 6 used in the description of the first embodiment can also be applied to the input graphics processing command and the description related thereto.

When the process of step S304 ends, the process proceeds to step S305.
In step S305, the visual recognition effect calculation unit 205 performs processing for calculating the visual recognition effect based on the two-dimensional graphics arrangement information acquired in step S303 and the information regarding the projection condition acquired in step S304. Here, the calculation method of the visual recognition effect of step S305 in 2nd Embodiment is demonstrated.

  In the second embodiment, the visual recognition effect calculation unit 205 first performs a process of acquiring a line-of-sight vector from the projection condition acquired in step S304. For example, under the projection condition shown in FIG. 4A, the line-of-sight vector can be normalized to a unit vector and obtained as (0, 0, 1).

  Next, the visual recognition effect calculation unit 205 performs processing for acquiring a plane normal vector from the two-dimensional graphics arrangement information acquired in step S303. Next, the visual recognition effect calculation unit 205 calculates the inner product of the normal vector of the plane in the three-dimensional virtual space in which the two-dimensional graphics is arranged and the visual vector (0, 0, 1). Next, the visual recognition effect calculation unit 205 divides the obtained inner product by the product of the length of the line-of-sight vector and the length of the normal vector of the plane. Here, the obtained value is a cosine value of an angle formed by the line-of-sight vector and the plane normal vector. And the visual recognition effect calculation part 205 calculates the inverse cosine value of this value further in order to obtain | require an angle. The result of this calculation is in the range of angles 0-180 °.

  Here, with respect to the graphics processing instructions 401 to 403 shown in FIG. 4A, the calculation result of the angle θ formed by the normal vector and the line-of-sight vector of the surface on which the two-dimensional graphics are arranged will be described as a visual effect. .

  Specifically, for the first graphics processing instruction 401, an angle θ = 180 ° formed by the normal vector and the line-of-sight vector of the surface on which the two-dimensional graphics are arranged is calculated as a visual effect. For the second graphics processing instruction 402, an angle θ = 45 ° formed by the normal vector and the line-of-sight vector of the surface on which the two-dimensional graphics are arranged is calculated as a visual effect. For the third graphics processing instruction 403, an angle θ = 120 ° between the normal vector and the line-of-sight vector of the surface on which the two-dimensional graphics is arranged is calculated as a visual recognition effect.

Here, it returns to description of FIG. 3 again.
When the process of step S305 ends, the process proceeds to step S306.
In step S306, first, the two-dimensional graphics drawing processing execution unit 206 executes the two-dimensional graphics drawing processing command acquired in step S302 according to the calculation result of the visual effect in step S305, and executes the rasterization. Performs processing to generate an image. Specifically, in this example, the two-dimensional graphics rendering processing command acquired in step S302 is executed according to the angle θ formed by the normal vector and the line-of-sight vector of the surface on which the two-dimensional graphics is arranged, Processing for generating a raster image is performed. Next, the 3D graphics drawing unit 207 arranges the raster image generated by the 2D graphics drawing processing execution unit 206 based on the 2D graphics arrangement information in the 3D virtual space, and performs projection drawing processing according to the projection conditions. I do.

  Subsequently, in step S307, the graphics processing device 100-1 (for example, the graphics processing command receiving unit 201) determines whether or not the processing of the graphics processing command to be processed has ended.

  If the result of the determination in step S307 is that processing of the processing target graphics processing instruction has not ended (there is an unprocessed graphics processing instruction), the process returns to step S301, and the unprocessed graphics processing instruction Perform processing for.

  On the other hand, as a result of the determination in step S307, when the processing of the graphics processing instruction to be processed is completed, the processing of the flowchart in FIG.

Next, details of the processing in step S306 in FIG. 3 will be described.
FIG. 10 is a flowchart illustrating an example of detailed processing of the drawing processing in step S306 of FIG. 3 according to the second embodiment of this invention.

  First, in step S1001, the two-dimensional graphics drawing processing execution unit 206 determines whether or not the angle θ as a result of the visual effect calculation processing in step S305 satisfies 90 ° ≧ θ ≧ 0 °. If the angle θ satisfies 90 ° ≧ θ ≧ 0 ° as a result of the determination in step S1001, it is determined that the surface on which the two-dimensional graphics is arranged is invisible, and the processing in the flowchart of FIG. . In this case, for example, the second graphics processing instruction 402 shown in FIG. 4A is determined to be invisible because the angle θ = 45 °.

On the other hand, if it is determined in step S1001 that the angle θ does not satisfy 90 ° ≧ θ ≧ 0 ° (that is, the angle θ is 180 ° ≧ θ> 90 °), two-dimensional graphics are arranged. It is determined that the surface is visible, and the process proceeds to step S1002.
In step S1002, the two-dimensional graphics drawing processing execution unit 206 determines whether or not the angle θ as a result of the visual effect calculation processing in step S305 is larger than a preset angle threshold φ. To do. Here, the threshold value φ is a threshold value of an angle satisfying 180 ° ≧ φ> 90 ° stored in advance in the ROM 103 or the external memory 104, for example, for determining whether the visibility is good or difficult. It is a threshold value.

  In this example, an angle of 135 ° is applied as the threshold φ, and when θ> 135 °, the surface has good visibility, and when θ ≦ 135 °, the surface is determined to be difficult to visually recognize. To do. In this case, for example, the first graphics processing instruction 401 in FIG. 4A is determined to have good visibility because the angle θ = 180 °, while the third graphics processing instruction 403 is Since the angle θ is 120 °, it is determined that the viewing is difficult.

If the result of determination in step S1002 is that the angle θ is larger than the threshold value φ (135 ° in this example), the process proceeds to step S1003.
In step S1003, for example, the two-dimensional graphics drawing processing execution unit 206 sets the two-dimensional graphics drawing processing mode to the image quality priority mode.

On the other hand, if the result of determination in step S1002 is that the angle θ is not larger than the threshold value φ (that is, the angle θ is equal to or smaller than the threshold value φ), the process proceeds to step S1004.
In step S1004, for example, the two-dimensional graphics drawing processing execution unit 206 sets the two-dimensional graphics drawing processing mode to the speed priority mode.

When the process of step S1003 or S1004 ends, the process proceeds to step S1005.
In step S1005, the two-dimensional graphics drawing processing execution unit 206 executes the two-dimensional graphics drawing processing command acquired in step S302 according to the set two-dimensional graphics drawing processing mode. Then, the two-dimensional graphics drawing processing execution unit 206 performs processing for generating a raster image (bitmap image).

  Subsequently, in step S1006, the three-dimensional graphics drawing unit 207 arranges the raster image (bitmap image) generated in step S1005 in the three-dimensional virtual space, and performs projection drawing processing. Then, the process in the flowchart of FIG.

Here, the image quality priority mode set in step S1003 and the speed priority mode set in step S1004 will be described.
In the two-dimensional graphics rendering process, when the image quality priority mode is set, the graphics image quality is drawn higher than when the speed priority mode is set, while the graphics quality is higher than when the speed priority mode is set. This slows down the processing speed. On the contrary, when the speed priority mode is set, the graphics processing speed is faster than when the image quality priority mode is set, but the image quality is inferior to that when the image quality priority mode is set.

  Here, as an example, the case of processing the circle drawing processing command shown in FIG.

  In normal graphics processing, drawing processing cannot be performed in units smaller than pixels, and so-called jaggy occurs in the contour. Therefore, the color of the boundary pixel is determined by calculating a color mixture with the background color so that the contour of the figure to be drawn merges with the background color, thereby smoothing the color gradient. This process is an anti-aliasing process.

This anti-aliasing process will be described by taking the circle drawing process command of FIG. 4 as an example.
FIG. 11 is a schematic diagram illustrating the concept of anti-aliasing.
Specifically, FIG. 11A is a diagram illustrating a part of a pixel state when a circle rendering process command is rendered without anti-aliasing for a white bitmap image. In this case, since anti-aliasing processing is not performed, not only the pixels in the graphic but also the contour pixels are all changed to black.

  On the other hand, FIG. 11B is a diagram showing a part of a pixel state when a circle drawing processing command is drawn with anti-aliasing processing on a white bitmap image. In this case, the pixels in the figure are changed to black, but the pixels on the outline of the figure are changed to black, dark gray, and light gray. Here, the dark gray and light gray pixels are colors calculated as an intermediate color between the white of the background and the black of the figure. In the example shown in FIG. 11B, anti-aliasing processing with 4 gradations is performed, but any number of gradations may be used as long as the number of gradations is 3 gradations or more.

  In anti-aliasing, an intermediate color between the color of the figure and the color of the background bitmap image must be calculated. When antialiasing processing is performed, the processing speed is slower than when antialiasing processing is not performed when the same graphic is drawn. On the other hand, when the anti-aliasing process is performed, the jaggy that occurs when the anti-aliasing process is not performed becomes inconspicuous, and the image quality becomes higher. Here, as a two-dimensional graphics drawing processing command that can be applied, there is a drawing processing command for an outline font in addition to a graphics drawing processing command for drawing an arbitrary graphic combining curves and line segments.

  Therefore, in this example, an anti-aliasing invalid mode for drawing a figure without anti-aliasing processing is used as the speed priority mode, and an anti-aliasing effective mode for drawing a figure while performing anti-aliasing processing is applied as the image quality priority mode.

  In the case of the first graphics processing instruction 401 in FIG. 4A, the anti-aliasing processing valid mode is set in step S1003, and the two-dimensional graphics rendering processing based on the anti-aliasing processing valid mode is performed in step S1005. In the case of the third graphics processing instruction 403 in FIG. 4A, the anti-aliasing processing invalid mode is set in step S1004, and the two-dimensional graphics rendering processing based on the anti-aliasing processing invalid mode is performed in step S1005. .

  Thereafter, in step S1006, the two-dimensional graphics are arranged and projected in the three-dimensional virtual space, and the drawn result is output to the display unit (monitor) 106, and the process ends.

  In the present embodiment, the two-dimensional graphics rendering processing command relates to vector graphics, and the example in which the image quality priority mode and the speed priority mode are switched between the anti-aliasing processing enabled and disabled has been described. It is not limited. In the present embodiment, other two-dimensional graphics drawing processing may be switched.

  Here, the two-dimensional graphics drawing processing command included in the graphics processing command relates to raster graphics that draws a raster image by performing two-dimensional affine transformation processing such as enlargement, reduction, rotation, and shear deformation. The case will be described.

  When generating a raster image, a nearest neighbor method and a bilinear method are often used as a method of performing resampling calculation by performing a two-dimensional affine transformation process. Here, the nearest neighbor method is a method in which the coordinates of the mapping source are calculated from the mapping destination pixels of the two-dimensional affine transformation map, and the value of the nearest pixel is used. In the bilinear method, when determining the color of a pixel that is a mapping destination of a two-dimensional affine transformation map, the coordinates of the mapping source are calculated from the pixels, and the values of neighboring four pixels are interpolated to the obtained coordinates. is there.

  The nearest neighbor method is simpler in calculation to determine the color than the bilinear method, and thus the processing is faster, but in most cases it is inferior in image quality. Therefore, the graphics processing apparatus according to the present embodiment may perform processing using the bilinear method as the image quality priority mode and perform processing using the nearest neighbor method as the speed priority mode.

  Further, when the color gradation is specified in the two-dimensional graphics rendering processing command, the gradation intermediate color may be calculated in detail in the image quality priority mode and coarsely in the speed priority mode. Specifically, processing may be performed using True Color in the image quality priority mode, and processing may be performed using High Color in the speed priority mode.

  In this embodiment, an example of a configuration for calculating an angle formed by a normal vector and a line-of-sight vector of a plane on which a two-dimensional graphic is arranged is shown as a visual effect. However, other visual effect calculation methods are used. May be. For example, the area occupied by the projection plane of the two-dimensional graphics to be processed is calculated, and in step S1003, the image quality priority mode is set when the area exceeds a preset area threshold. In this case, in step S1005, drawing processing based on the image quality priority mode is performed. In step S1004, the speed priority mode is set when the area occupied by the projection plane is equal to or smaller than a preset area threshold. In this case, in step S1005, drawing processing based on the speed priority mode is performed.

  Further, as a method for calculating the visual effect, the visual effect calculation unit 205 is further input with three-dimensional illumination effect information, and the visual effect calculation unit 205 determines the visual effect based on the brightness of the two-dimensional graphics based on the three-dimensional illumination effect information. May be calculated. More specifically, the visual recognition effect may be calculated based on the brightness of a plane or the like on which two-dimensional graphics are arranged based on the three-dimensional lighting effect information. In this case, in step S1002, whether to perform drawing processing in the image quality priority mode or drawing processing in the speed priority mode is determined depending on whether or not the brightness exceeds a preset brightness threshold. Specifically, when the calculated brightness exceeds the threshold value, the drawing process is performed in the image quality priority mode, and in other cases, the drawing process is performed in the speed priority mode.

  In this embodiment, an example in which a preset threshold value is used when setting the image quality priority mode and the speed priority mode has been described. For example, the threshold value is controlled from the processing load of the graphics processing apparatus according to this embodiment. You may comprise.

(Third embodiment)
Next, a third embodiment of the present invention will be described.
Since the hardware configuration of the graphics processing apparatus according to the third embodiment is the same as the hardware configuration of the graphics processing apparatus according to the first embodiment shown in FIG. 1, detailed description thereof is omitted.

  FIG. 12 is a block diagram illustrating an example of a functional configuration of a graphics processing apparatus according to the third embodiment of the present invention. Here, in FIG. 12, the same reference numerals are given to the same functional configuration as in FIG. 2, and the graphics processing device shown in FIG. 12 is described as “graphics processing device 100-3”. .

  A graphics processing apparatus 100-3 in FIG. 12 has a two-dimensional graphics arrangement information processing unit 1201 in addition to the functional configurations of 201 to 205, 207, and 106 shown in FIG. A drawing processing execution unit 1202 is provided. Here, in FIG. 12, since the processing content is different from the processing of the two-dimensional graphics drawing processing execution unit 206 shown in FIG. 2, the two-dimensional graphics drawing processing execution unit 1202 is illustrated.

  The two-dimensional graphics arrangement information processing unit 1201 and the two-dimensional graphics drawing processing execution unit 1202 in FIG. 12 are configured from programs stored in the CPU 101 and the ROM 103 or the external memory 104 shown in FIG.

  Similar to the first embodiment, the graphics processing command receiving unit 201 performs processing for receiving a graphics processing command based on information input to the graphics processing device 100-1.

  Similar to the first embodiment, the two-dimensional graphics drawing processing command acquisition unit 202 performs processing for acquiring a two-dimensional graphics drawing processing command from the graphics processing command received by the graphics processing command receiving unit 201. . Similar to the first embodiment, the two-dimensional graphics arrangement information acquisition unit 203 uses the graphics processing instruction received by the graphics processing instruction reception unit 201 to obtain two-dimensional graphics arrangement information related to the arrangement of two-dimensional graphics. Process to get. As in the first embodiment, the projection condition acquisition unit 204 performs processing for acquiring information related to projection conditions from the graphics processing command received by the graphics processing command reception unit 201.

  Similar to the first embodiment, the visual effect calculation unit 205 is based on the two-dimensional graphics arrangement information acquired by the two-dimensional graphics arrangement information acquisition unit 203 and information on the projection conditions acquired by the projection condition acquisition unit 204. Then, processing for calculating the visual effect is performed.

  The two-dimensional graphics arrangement information processing unit 1201 adds a condition to the two-dimensional graphics arrangement information according to the visual effect calculated by the visual effect calculation unit 205, and generates conditional two-dimensional graphics arrangement information. Specifically, the two-dimensional graphics arrangement information processing unit 1201 divides the arrangement area related to the two-dimensional graphics arrangement information according to the visual recognition effect, and adds a condition to the two-dimensional graphics arrangement information. Generate two-dimensional graphics layout information.

  The two-dimensional graphics drawing processing execution unit 1202 executes the two-dimensional graphics drawing processing command acquired by the two-dimensional graphics drawing processing command acquisition unit 202 for each conditional two-dimensional graphics arrangement information, and generates a raster image. Generate the process.

  The three-dimensional graphics drawing unit 207 arranges the raster image generated by the two-dimensional graphics drawing processing execution unit 1202 in the three-dimensional virtual space based on the two-dimensional graphics arrangement information, and performs drawing processing according to the projection conditions. .

Next, the processing procedure of the graphics processing method by the graphics processing apparatus 100-3 will be described.
FIG. 13 is a flowchart showing an example of the processing procedure of the graphics processing method by the graphics processing apparatus according to the third embodiment of the present invention.

  First, in step S1301, the graphics processing command receiving unit 201 performs processing for receiving a graphics processing command based on information input to the graphics processing device 100-3.

Here, the graphics processing instruction of this embodiment will be described.
FIG. 14 is a schematic diagram illustrating an example of a graphics processing instruction 1400 received by the graphics processing instruction receiving unit 201 in FIG. 12 according to the third embodiment of this invention.

  FIG. 14A shows a two-dimensional graphics rendering processing command 1410, two-dimensional graphics arrangement information 1420, and a projection condition 1430 included in the graphics processing command 1400.

  A two-dimensional graphics drawing processing command 1410 shown in FIG. 14A is composed of two-dimensional graphics drawing processing commands 1411 to 1414. Also, the two-dimensional graphics arrangement information 1420 shown in FIG. 14A includes information for arranging the two-dimensional graphics arrangement curved surface, that is, the two-dimensional graphics so as to be pasted on the side surface of the cylinder. Yes. Further, in the projection condition 1430 shown in FIG. 14A, a viewpoint condition, a projection plane condition, and a projection method are defined.

  FIG. 14B shows the positional relationship between the circles 1401 to 1404 based on the two-dimensional graphics drawing processing command, the two-dimensional graphics drawing processing target bitmap, and the XY axes. It is assumed that the two-dimensional graphics drawing process target bitmap is initially white, and is a rectangle having a size obtained by developing the side surface of the designated cylinder. In the example of this embodiment, since the height of the cylinder is 4 and the radius is 2, the height is 4 and the width is 4π.

  In FIG. 14B, a circle 1401 indicates the position of the figure to be drawn by the two-dimensional graphics drawing processing command 1411. Similarly, a circle 1402 indicates the position of the figure to be drawn by the two-dimensional graphics drawing processing command 1412. A circle 1403 indicates the position of the figure to be drawn by the two-dimensional graphics drawing processing command 1413. A circle 1404 indicates the position of the figure to be drawn by the two-dimensional graphics drawing processing command 1414.

  FIG. 14C shows the relationship between the two-dimensional graphics arrangement information and the projection conditions in the three-dimensional virtual space. A point P (2.0, 2.0, 10.0) and a point Q (2.0, −2.0, 10.0) in FIG. 14C are both X = 2.0 and Z = It is a point on a straight line represented by 10.0. In FIG. 14B, the four points of the rectangle related to the two-dimensional graphics rendering target bitmap are A, B, C, and D, the midpoint of the side AD is M, and the midpoint of the side BC is N. To do. After performing the two-dimensional graphics drawing process, a bitmap image is generated. Here, in order to arrange the bitmap image according to the two-dimensional graphics arrangement information, the point M in FIG. 14B is made to coincide with the point P in FIG. 14C, and the point in FIG. What is necessary is just to arrange | position so that N may correspond to the point Q of FIG.14 (c), and to correspond with the side surface of a cylinder.

Here, it returns to description of FIG. 13 again.
When the process of step S1301 is completed, in step S1302, the two-dimensional graphics drawing processing command acquisition unit 202 performs processing for acquiring a two-dimensional graphics drawing processing command from the graphics processing command received in step S301. Do.

  Subsequently, in step S1303, the two-dimensional graphics arrangement information acquisition unit 203 performs processing for acquiring two-dimensional graphics arrangement information related to the arrangement of the two-dimensional graphics from the graphics processing instruction received in step S301.

  Subsequently, in step S1304, the projection condition acquisition unit 204 performs processing for acquiring information related to the projection condition from the graphics processing command received in step S301.

  Subsequently, in step S1305, the visual effect calculation unit 205 performs processing for calculating the visual effect based on the two-dimensional graphics arrangement information acquired in step S1303 and the information regarding the projection condition acquired in step S1304.

  Subsequently, in step S1306, the two-dimensional graphics arrangement information processing unit 1201 adds a condition to the two-dimensional graphics arrangement information according to the visual effect calculated by the visual effect calculation unit 205, and the conditional two-dimensional graphics. Generate placement information.

  Here, the visual effect calculation processing in step S1305 and the conditional two-dimensional graphics arrangement information generation processing in step S1306 will be described in detail.

  First, the visual effect calculation unit 205 calculates a unit vector of the line-of-sight vector from the projection condition. Here, in the parallel projection method, the line-of-sight vector is a vector perpendicular to the projection plane from the viewpoint position toward the projection plane. In the case of the projection condition 1430 shown in FIG. 14A, the line-of-sight vector calculated here is (0, 0, 1). In addition, each point of the surface specified by the two-dimensional graphics arrangement information is invisible, visible, good visibility, or difficult to see depending on the angle (θ) between the normal vector and the line-of-sight vector of the surface at the point. Is determined.

  Here, the discrimination between visible and invisible is, for example, determined as visible only when the angle (θ) between the normal vector and the line-of-sight vector is greater than 90 °, and otherwise determined as invisible. Further, when it is determined to be visible, it is further determined whether the visibility is good or the visibility is difficult. At this time, in order to determine whether the visibility is good or difficult, for example, a threshold (φ) relating to the visibility determination reference angle stored in advance in the ROM 103 or the external memory 104 is used. Here, in this example, an angle of 135 ° is applied as the threshold (φ), and when the angle (θ) formed between the normal vector and the line-of-sight vector is larger than the angle 135 °, it is determined that the visibility is good, and otherwise In the case of, it is determined that visual recognition is difficult.

  FIG. 15 is a schematic diagram for explaining the processing contents of steps S1305 and S1306 in FIG. 13 according to the third embodiment of this invention. Specifically, FIG. 15 illustrates a state in which the relationship between the two-dimensional graphics arrangement curved surface and the line-of-sight vector of the two-dimensional graphics arrangement information and the XYZ coordinate axes is viewed from the Y-axis direction.

  In the cylinder shown in FIG. 14C, since the axis of the cylinder is parallel to the Y axis, the normal vector of the point on the side surface of the cylinder is expressed only by the X coordinate and the Z coordinate. Here, the normal vector at the point (x, y, z) on the side surface of the cylinder is (x, 0, z-10). By obtaining the angle formed by the obtained normal vector and line-of-sight vector, the two-dimensional graphics arrangement curved surface has one invisible area 1504, two difficult-to-view areas 1501 and 1503, and one visibility as shown in FIG. The region can be divided into good regions 1502. In the process of step S1306, the conditions of these areas are added to the two-dimensional graphics arrangement information to generate conditional two-dimensional graphics arrangement information.

Here, it returns to description of FIG. 13 again.
When the processing in step S1306 is completed, in step S1307, the two-dimensional graphics drawing processing execution unit 1202 outputs the two-dimensional graphics drawing processing command acquired in step S1302 for each conditional two-dimensional graphics arrangement information. Execute. Then, the two-dimensional graphics drawing processing execution unit 1202 performs processing for generating a raster image (bitmap image).

Here, the two-dimensional graphics rendering process in step S1307 will be described in detail.
In step S1307, the two-dimensional graphics drawing process target bitmap is divided in accordance with the conditions of each region of the two-dimensional graphics arrangement curved surface divided by the processes in steps S1305 and S1306.

  FIG. 16 is a schematic diagram for explaining the processing content of step S1307 in FIG. 13 according to the third embodiment of this invention. Specifically, FIG. 16 shows a state in which a bitmap to be subjected to two-dimensional graphics drawing processing is divided.

  In FIG. 16, points A, B, C, D, M, and N have the same meaning as the symbols used in FIG. Since the point M and the point N are arranged along the side surface of the cylinder so as to coincide with the point P and the point Q on the side surface of the cylinder, respectively, in FIG. The area becomes an invisible area 1504.

  In FIG. 15, the difficult-to-view regions 1501 and 1503 occupy a 45 ° region centering on the axis of the cylinder, so in FIG. 16, the region −2π <X <−1.5π The area of 0, that is, the area of the quadrilateral ABFE and the quadrilateral HGNM, is a difficult-to-view area. The remaining region of −1.5π ≦ X ≦ 0.5π is the visibility region 1502. Here, FIG. 16 shows an example of the difficult-to-view regions 1501 and 1503, the good visibility region 1502 and the invisible region 1504 corresponding to FIG.

Next, in step S1307, a process is performed to determine in which area the two-dimensional graphics rendering processing commands 1411 to 1414 shown in FIG.
Specifically, since the two-dimensional graphics drawing processing command 1411 is a processing command for drawing a circle having a center (−5.0, 0.0) and a radius of 1.0, the drawing region is a difficult-to-view region 1501. include. Further, since the two-dimensional graphics drawing processing command 1412 is a processing command for drawing a circle having a center (−3.5, 1.0) and a radius of 1.0, the drawing region is set to the visibility region 1502. included. Further, since the two-dimensional graphics drawing processing command 1413 is a processing command for drawing a circle having a center (−1.5, −1.0) and a radius of 1.0, the drawing region has a good visibility region 1502. And straddles the difficult-to-view region 1503. Further, since the two-dimensional graphics drawing processing command 1414 is a processing command for drawing a circle having a center (2.5, 0.0) and a radius of 1.0, the drawing region is included in the invisible region 1504.

  Next, in step S1307, processing for executing each two-dimensional graphics rendering processing command with conditions is performed.

  FIG. 17 is a flowchart illustrating an example of detailed processing of the drawing processing in step S1307 of FIG. 13 according to the third embodiment of this invention. Here, FIG. 17 shows a flow of processing for executing one two-dimensional graphics rendering processing command with conditions. When processing a plurality of two-dimensional graphics rendering processing commands, The process shown in FIG. 17 is repeated for the plurality of parts.

  First, in step S1701, the two-dimensional graphics drawing processing execution unit 1202 determines that all or a part of the drawing area (that is, at least a part of the drawing area) by the two-dimensional graphics drawing processing command is a good visibility area. Determine whether it is included.

  As a result of the determination in step S1701, when all or part of the drawing area by the two-dimensional graphics drawing processing command is included in the good visibility area, the process proceeds to step S1702.

  In step S1702, the two-dimensional graphics drawing processing execution unit 1202 sets the two-dimensional graphics drawing processing mode to the image quality priority mode.

  On the other hand, if the result of determination in step S1701 is that all or part of the drawing area by the two-dimensional graphics drawing processing command is not included in the high visibility area, the process proceeds to step S1703.

  In step S1703, the two-dimensional graphics drawing processing execution unit 1202 includes all or a part of the drawing area (that is, at least a part of the drawing area) by the two-dimensional graphics drawing processing command included in the difficult-to-view area. It is determined whether or not.

  As a result of the determination in step S1703, if all or part of the drawing area by the two-dimensional graphics drawing processing command is included in the difficult-to-view area, the process proceeds to step S1704.

  In step S1704, the two-dimensional graphics drawing processing execution unit 1202 sets the two-dimensional graphics drawing processing mode to the speed priority mode.

When the process of step S1702 or S1704 ends, the process proceeds to step S1705.
In step S1705, the two-dimensional graphics drawing processing execution unit 1202 executes the two-dimensional graphics drawing processing command acquired in step S1302 according to the set two-dimensional graphics drawing processing mode. Then, the two-dimensional graphics drawing processing execution unit 206 performs processing for generating a raster image (bitmap image).

  On the other hand, if it is determined in step S1703 that all or part of the drawing area by the two-dimensional graphics drawing processing command is not included in the difficult-to-view area, the drawing area is all included in the invisible area. Therefore, the process of FIG. That is, in this case, the two-dimensional graphics drawing process is not performed. In addition, when the process of step S1705 ends, the process of FIG. 17 ends.

  Then, the processing in steps S1701 to S1705 described above is repeated for the two-dimensional graphics drawing processing command for drawing on the same two-dimensional graphics drawing processing target bitmap.

  In the present embodiment, for example, the anti-aliasing effective mode described in the second embodiment is applied as the image quality priority mode, and the anti-aliasing invalid mode described in the second embodiment is applied as the speed priority mode. In this case, the two-dimensional graphics drawing processing instruction 1411 shown in FIG. 14A is drawn in the anti-aliasing invalid mode. Further, the two-dimensional graphics drawing processing command 1412 and the two-dimensional graphics drawing processing command 1413 shown in FIG. 14A are drawn in the anti-aliasing effective mode. Further, the two-dimensional graphics drawing processing instruction 1414 shown in FIG. 14A is not drawn. As a result, the result of the drawing process as shown in FIG. 18 is obtained.

FIG. 18 is a schematic diagram illustrating an example of a processing result of the drawing process in step S1307 of FIG. 13 according to the third embodiment of this invention.
In FIG. 18, an anti-aliased circle 1801 is based on the two-dimensional graphics drawing processing instruction 1411 shown in FIG. The anti-aliased circles 1802 and 1803 are based on the two-dimensional graphics drawing processing instructions 1412 and 1413 shown in FIG.

Here, it returns to description of FIG. 13 again.
When the process of step S1307 ends, the process proceeds to step S1308.
In step S1308, the three-dimensional graphics drawing unit 207 performs drawing processing in which the raster image (bitmap image) generated in step S1307 is arranged in the three-dimensional virtual space and projected according to the projection conditions.

FIG. 19 is a schematic diagram illustrating an example of a processing result of the drawing process in step S1308 of FIG. 13 according to the third embodiment of this invention.
When the graphics processing command shown in FIG. 14 is processed, for example, three-dimensional graphics as shown in FIG. 19A is output. In the present embodiment, only the parallel projection method has been described, but a perspective projection method may be used. FIG. 19B shows an output example using the perspective projection method.

Here, it returns to description of FIG. 13 again.
When the process of step S1308 ends, in step S1309, the graphics processing device 100-3 (for example, the graphics processing command receiving unit 201) determines whether the processing of the processing target graphics processing command is ended. to decide.

  As a result of the determination in step S1309, if the processing of the processing target graphics processing instruction is not completed (there is an unprocessed graphics processing instruction), the process returns to step S1301 to return to the unprocessed graphics processing instruction. Perform processing for.

  On the other hand, as a result of the determination in step S1309, when the processing of the graphics processing instruction to be processed is completed, the processing of the flowchart in FIG.

  According to the first to third embodiments described above, it is possible to realize a reduction in processing load without reducing visibility when placing a two-dimensional graphic in a three-dimensional virtual space and performing a drawing process. it can. In particular, when the two-dimensional graphics changes over time, it is possible to realize a further reduction in processing load.

  In the first to third embodiments described above, the example in which the two-dimensional graphics arrangement information is given as a curved surface or a plane in the three-dimensional virtual space is shown. It may be a form given by a plane equation.

(Other embodiments of the present invention)
2 and 12 constituting the graphics processing apparatus 100 according to each embodiment of the present invention described above executes a program stored in a storage medium (103 or 104) by a CPU (101) of a computer. Can be realized. 3, 7, 10, 13, and 17, which show the graphics processing method by the graphics processing apparatus 100, is stored in the storage medium (103 or 104) by the computer CPU (101). This can be realized by executing the program. This program and a computer-readable recording medium storing the program are included in the present invention.

  In addition, the present invention can be implemented as, for example, a system, apparatus, method, program, storage medium, or the like. Specifically, the present invention may be applied to a system including a plurality of devices. You may apply to the apparatus which consists of one apparatus.

  In the present invention, a software program (in the embodiment, a program corresponding to the flowcharts shown in FIGS. 3, 7, 10, 13, and 17) that realizes the functions of the above-described embodiments is used as a system or apparatus. Including direct or remote supply. The present invention also includes a case where the system or the computer of the apparatus is achieved by reading and executing the supplied program code.

  Accordingly, since the functions of the present invention are implemented by computer, the program code installed in the computer also implements the present invention. In other words, the present invention includes a computer program itself for realizing the functional processing of the present invention.

  In that case, as long as it has the function of a program, it may be in the form of object code, a program executed by an interpreter, script data supplied to the OS, and the like.

  Examples of the recording medium for supplying the program include a flexible disk, hard disk, optical disk, magneto-optical disk, MO, CD-ROM, CD-R, and CD-RW. In addition, there are magnetic tape, nonvolatile memory card, ROM, DVD (DVD-ROM, DVD-R), and the like.

  As another program supply method, a browser on a client computer is used to connect to an Internet home page. The computer program itself of the present invention or a compressed file including an automatic installation function can be downloaded from the homepage by downloading it to a recording medium such as a hard disk.

  It can also be realized by dividing the program code constituting the program of the present invention into a plurality of files and downloading each file from a different homepage. That is, the present invention includes a WWW server that allows a plurality of users to download a program file for realizing the functional processing of the present invention on a computer.

  In addition, the program of the present invention is encrypted, stored in a storage medium such as a CD-ROM, distributed to users, and key information for decryption is downloaded from a homepage via the Internet to users who have cleared predetermined conditions. Let The downloaded key information can be used to execute the encrypted program and install it on the computer.

  Further, the functions of the respective embodiments described above are realized by the computer executing the read program. In addition, based on the instructions of the program, an OS or the like running on the computer performs part or all of the actual processing, and the functions of the above-described embodiments can be realized by the processing.

  Further, the program read from the recording medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Thereafter, based on the instructions of the program, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are also realized by the processing.

  Note that each of the above-described embodiments is merely a specific example for carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. . That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

DESCRIPTION OF SYMBOLS 100: Graphics processing apparatus, 201: Graphics processing command receiving part, 202: Two-dimensional graphics drawing process command acquisition part, 203: Two-dimensional graphics arrangement information acquisition part, 204: Projection condition acquisition part 204, 205: Visual recognition Effect calculation unit, 206: 2D graphics rendering processing execution unit, 207: 3D graphics rendering unit, 106: Display unit (monitor)

Claims (16)

A graphics processing apparatus for processing an input graphics processing instruction,
Two-dimensional graphics drawing processing command acquisition means for acquiring a two-dimensional graphics drawing processing command from the graphics processing command;
2D graphics layout information acquisition means for acquiring 2D graphics layout information related to the layout of 2D graphics from the graphics processing instruction;
Projection condition acquisition means for acquiring information on the projection condition from the graphics processing command;
A visual effect calculation unit that calculates a visual effect based on a position of a viewpoint in a three-dimensional virtual space in which the two-dimensional graphics are arranged based on the two-dimensional graphics arrangement information and information on the projection condition;
A graphics processing apparatus comprising: a two-dimensional graphics drawing processing execution unit that executes a process for generating a raster image by executing the two-dimensional graphics drawing processing command according to the visual recognition effect. In accordance with the visual recognition effect, the image processing apparatus further includes a two-dimensional graphics arrangement information processing unit that divides the arrangement area related to the two-dimensional graphics arrangement information and generates conditional two-dimensional graphics arrangement information.
The graphics processing apparatus according to claim 1, wherein the two-dimensional graphics drawing processing execution unit executes the two-dimensional graphics drawing processing command based on the conditional two-dimensional graphics arrangement information. The visual effect calculation means performs a calculation for determining whether the visual effect is visible or invisible;
2. The graphics processing apparatus according to claim 1, wherein the two-dimensional graphics drawing processing execution unit executes the two-dimensional graphics drawing processing command when it is visible. 3. The visual effect calculating means further performs calculation for determining whether the visibility is good or difficult when the visual effect is visible,
The graphics processing apparatus according to claim 3, wherein the two-dimensional graphics drawing processing execution unit executes the two-dimensional graphics drawing processing command according to whether the visibility is good or difficult. The two-dimensional graphics arrangement information processing means generates visible conditional two-dimensional graphics arrangement information according to the visual effect,
3. The graphics processing according to claim 2, wherein the two-dimensional graphics drawing processing execution unit executes the two-dimensional graphics drawing processing command based on the visible conditional two-dimensional graphics arrangement information. apparatus. The two-dimensional graphics arrangement information processing means generates visibility two-dimensional graphics arrangement information indicating whether visibility is good or difficult according to the visual recognition effect,
3. The graphics according to claim 2, wherein the two-dimensional graphics drawing processing execution unit executes the two-dimensional graphics drawing processing instruction based on the two-dimensional graphics arrangement information with the visibility condition. Processing equipment.   The two-dimensional graphics drawing processing execution means executes the two-dimensional graphics drawing processing command in an image quality priority mode when the visibility is good, and when the visibility is difficult, the speed priority mode is executed. The graphics processing apparatus according to claim 4, wherein the two-dimensional graphics drawing processing instruction is executed.   The two-dimensional graphics rendering processing execution means does not perform anti-aliasing in the speed priority mode and performs anti-aliasing in the image quality priority mode when the two-dimensional graphics rendering processing instruction relates to vector graphics. The graphics processing apparatus according to claim 7.   The two-dimensional graphics drawing processing execution means uses a nearest neighbor method for resampling calculation when the two-dimensional graphics drawing processing instruction relates to raster graphics, and uses the nearest neighbor method in the speed priority mode, 8. The graphics processing apparatus according to claim 7, wherein a bilinear method is used in the image quality priority mode.   The graphics processing apparatus according to claim 1, wherein the visual recognition effect calculation unit calculates the visual recognition effect based on brightness of the two-dimensional graphics based on input three-dimensional illumination effect information.   The graphics processing apparatus according to claim 1, wherein the two-dimensional graphics arrangement information is given as a curved surface or a plane in the three-dimensional virtual space.   The graphics processing apparatus according to claim 1, wherein the two-dimensional graphics arrangement information is given by an equation of a curved surface or a plane in the three-dimensional virtual space.   The graphics processing apparatus according to claim 1, wherein the projection condition is defined by a condition of a projection plane and a condition of the viewpoint, and defines a condition for projection using a perspective projection method.   The graphics processing apparatus according to claim 1, wherein the projection condition is defined by a condition of a projection plane, and defines a condition for projection using a parallel projection method. A graphics processing method by a graphics processing apparatus for processing an input graphics processing instruction,
A two-dimensional graphics drawing processing command acquisition step for acquiring a two-dimensional graphics drawing processing command from the graphics processing command;
A two-dimensional graphics arrangement information acquisition step for acquiring two-dimensional graphics arrangement information related to the arrangement of the two-dimensional graphics from the graphics processing instruction;
A projection condition obtaining step for obtaining information on the projection condition from the graphics processing command;
A visual effect calculation step for calculating a visual effect based on the position of the viewpoint in the three-dimensional virtual space in which the two-dimensional graphics are arranged based on the two-dimensional graphics arrangement information and the information on the projection condition;
A graphics processing method comprising: a two-dimensional graphics rendering process execution step of executing a process of generating a raster image by executing the two-dimensional graphics rendering process command in accordance with the visual recognition effect. A program for causing a computer to execute a graphics processing method by a graphics processing apparatus for processing an input graphics processing instruction,
A two-dimensional graphics drawing processing command acquisition step for acquiring a two-dimensional graphics drawing processing command from the graphics processing command;
A two-dimensional graphics arrangement information acquisition step for acquiring two-dimensional graphics arrangement information related to the arrangement of the two-dimensional graphics from the graphics processing instruction;
A projection condition obtaining step for obtaining information on the projection condition from the graphics processing command;
A visual effect calculation step for calculating a visual effect based on the position of the viewpoint in the three-dimensional virtual space in which the two-dimensional graphics are arranged based on the two-dimensional graphics arrangement information and the information on the projection condition;
A program for causing a computer to execute a two-dimensional graphics drawing processing execution step of executing a process of generating a raster image by executing the two-dimensional graphics drawing processing command according to the visual recognition effect.

Images