JPH05119764A - Method for plotting design data of circuit - Google Patents

Abstract

PURPOSE:To plot the design data of an integrated circuit on a display device at high speed by preparing data previously expressed in terms of bit map and plotting it. CONSTITUTION:The display device is constituted of a secondary storage means 11 which stores plotting object data, a primary storage means 12 which temporarily stores the plotting object data by apex column expression 13 and a bit map expression 14 which are a data storing method on the means 11 at the time of plotting processing, an arithmetic means 15 consisting of a plotting requirement program 16 and a plotting program 17, and a display means 18. In this plotting method, the bit map expression data is directly required to be plotted instead of apex expression data, so that plotting speed is increased. For example, in the conventional system, 100Mbyte of data transfer and bit map conversion are needed in order to plot the input data of 100Mbyte. In this system, only at most 1Mbyte of transfer will do, and the speed 100 or more times as high as the conventional one is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for drawing circuit design data, and more particularly to a high-speed drawing method for performing drawing while switching between vertex sequence expression drawing and bitmap expression drawing.

[0002]

2. Description of the Related Art As a system using a conventional circuit design data drawing method, the whole design data of an integrated circuit to be drawn and a magnified part are alternately drawn on a display to find a desired visual point. You can think of something to display. At this time, the entire design data of the integrated circuit is redrawn multiple times.

For example, as shown in FIG. 3, a secondary storage means, a primary storage means for storing data in the form of a vertex expression, a computing means,
It has a drawing request program, a drawing program and a display means, and its operation is to temporarily store in the primary storage means the data input from the secondary storage means by the drawing request program in the form of a vertex sequence, and to store the data on the primary storage means. Is transferred to the drawing program as it is and drawn. The vertex sequence representation means that each drawing data is considered as a polygon and is represented by a collection of the vertex sequences. Here, in particular, the drawing request program and the drawing program perform the comparison process by the means as shown in FIG. That is, the drawing request program inputs the data in the primary storage as the vertex representation and passes it to the drawing program as long as the drawing data remains in the secondary storage, and the drawing program converts each received data into a bitmap and displays it. It was supposed to output to.

[0004]

However, in a system of this kind, which tends to be repeatedly given the same drawing request,
In the conventional circuit design data drawing method described above, every time a drawing request is issued, all the data including the sub-bit fine data that can be visually confirmed on the display by the human eye is eventually obtained. , It was necessary to transfer from the drawing request program to the drawing program, to make a bitmap in the drawing program, and to output them to the display. This has a drawback in that the frequency of transfer to the drawing program from the drawing request program for the same drawing data and the bitmap conversion in the drawing program is significantly increased, and the processing time is significantly increased. That is, in the conventional drawing processing, the above-mentioned processing is considered to be indispensable because the data storage method on the drawing requesting program side is limited to the vertex representation, and replacement with another means is very important. It was difficult. Therefore,
When it is attempted to draw data having a size of 100 Mbytes on the secondary storage as the above-mentioned processing scale, 100 Mbytes of transfer and conversion processing are required each time drawing is performed, resulting in a significant increase in processing time.

[0005]

A circuit design data drawing method according to the present invention comprises a secondary storage means for storing drawing target data and a method for storing the drawing target data in the secondary storage means at the time of drawing processing. The primary storage means for temporarily storing the vertex array representation and the bitmap representation, the computing means for performing the rendering request and the rendering computation, and the display means.

[0006]

The present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, one embodiment of the present invention is a secondary storage means for storing drawing target data and a method for storing the drawing target data in the secondary storage means at the time of drawing processing. It is composed of a primary storage means for temporarily storing the vertex string representation and the bitmap representation, a computing means composed of a drawing request program and a drawing program, and a display means.

Next, the drawing request program and the drawing program will be described with reference to FIG.

In FIG. 2, the drawing request program converts the data into vertex representations and bitmap representations and inputs them into the primary storage as long as the drawing data remains in the secondary storage, and then the drawing data number is constant. If the value is less than or equal to, the vertex expression data is transferred to the drawing program as in the conventional case, and if the number of drawing data is greater than or equal to the above value, the bitmap expression data is transferred to the drawing program. Further, in FIG. 2, the drawing program, if the drawing request data is the vertex expression data, bit-maps the data as in the conventional case and then outputs it to the display. Output to the display.

When this method is applied to, for example, design data of an integrated circuit, particularly layout data, in FIG.
First, the layout data is stored in the secondary storage,
Next, the drawing request program stores it in the temporary storage while converting it into the vertex array representation and the layout data entire area, that is, the bitmap representation on the bitmap plane of the size of the chip size. Further, those data are transferred to the drawing program. At the time of drawing the entire chip or a large area corresponding to it, bitmap expression data is transferred and high-speed drawing is performed. In other cases, vertex array expression data is transferred and detailed drawing is performed.

Further, the present method can be applied to design data of integrated circuits, particularly circuit diagram data.

[0012]

According to the circuit design data drawing method of the present invention, the drawing speed can be increased by directly drawing the bitmap expression data instead of the vertex expression data. For example, in order to draw 100 Mbytes of input data in the conventional method, it was necessary to transfer about 100 Mbytes of data and bitmap conversion. With this method, however, the bitmap data amount of the display, that is, 1 Mbytes at most is transferred. Only this is required, and 100 times or more speedup is possible.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is a processing flow chart of an embodiment of the present invention.

FIG. 3 is a conventional overall configuration diagram.

FIG. 4 is a conventional processing flow chart.

[Explanation of symbols]

 11 Secondary Storage Means 12 Primary Storage Means 13 Vertex Representation Data 14 Bitmap Representation Data 15 Computing Means 16 Drawing Request Program 17 Drawing Program 18 Display Means 21 Drawing Request Program 22 Start 23 Secondary Storage Reading Means 24 Vertex Expression Data Creating Means 25 Bitmap data creation means 26 Data end determination means 27 Drawing data number determination means 28 Vertex expression data drawing request means 29 Bitmap data drawing request means 210 End 211 Drawing program 212 Drawing request acceptance means 213 Drawing data type judgment means 214 Bitmap conversion Means 215 Display drawing request means 31 Secondary storage means 32 Primary storage means 33 Vertex expression data 34 Computing means 35 Drawing request program 36 Drawing program 37 Display means 41 Drawing Image request program 42 Start 43 Secondary storage reading means 44 Vertex expression data creation means 45 Data end determination means 46 Vertex expression data drawing request means 47 End 48 Drawing program 49 Drawing request acceptance means 410 Bit map forming means 411 Display drawing request means

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Claims (1)

[Claims] 1. A secondary storage means for storing drawing target data, and a primary storage for temporarily storing the drawing target data in a vertex processing expression and a bitmap expression which are data storage methods on the secondary storage means at the time of drawing processing. A drawing method of circuit design data, comprising: a means, an operation means for making a drawing request and a drawing operation, and a display means.