JP2004102619A - Print controller, print data transmitting method, computer program and computer readable storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely transfer all print data to a printer for each print data for one scan print width of a recording head in an output timing desired by a printer driver regardless of the specifications of a spooler function prepared for an OS. <P>SOLUTION: A printer driver 103 issues a StartPagePrinter instruction and an EndPagePringer instruction before and after print processing for one page, and issues those two instructions as a pair in the order of the EndPagePrinter instruction and the StarPagePrinter instruction by each predetermined processing unit in the same page during print processing each time the preparation of print data necessary for the operation of a print head is completed as each predetermined processing unit. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technical field of a printer driver (printer driver program) mounted on a print control device for controlling an operation of a printer.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, when a printing system is configured using a printer and a host computer, a so-called printer driver (printer driver program) is used so that the host computer functions as a print control device for controlling the operation of the printer. ) Is mounted.
[0003]
The printer driver is a software program executed on the host computer. The printer driver converts graphics image data such as characters and figures created by application software installed on the host computer and image image data such as natural images into a printer. At the time of printing out by the application software, a rendering command based on image data supplied from an application software via an operating system (OS) is analyzed, and RGB multi-tone image data is created on a memory according to the analysis result. In a printer of the system, the data is converted into CMYK multi-valued information representing each color of the printer ink, and then converted into CMYK binary data representing whether or not the ink is applied, and then the data format which can be analyzed by the printer Generate print data for the printer It has a function of transferring.
[0004]
Among such printer drivers, a printer driver compatible with an operating system having a spool function such as Microsoft Windows (registered trademark) 2000 has a spool function for managing print data created by the printer driver by the operating system. It is a general processing configuration to transfer the data to a printer by using it.
[0005]
In particular, in the above-described general printer driver, a spool function is provided for notifying the spool function of the OS to write data to the designated printer and transferring the generated print data to the printer. A processing configuration in which the print data is transmitted to the printer by calling a print data write command function in the printer driver is employed (for example, see Patent Document 1).
[0006]
[Patent Document 1]
JP-A-10-240469 (FIG. 8)
[Problems to be solved by the invention]
A conventional inkjet printer controlled by the above-described banding printer driver has a print buffer for the print width, and when print data for the print width is accumulated (buffered) in the print buffer. The print head is driven, and one scan (print scan) is performed a plurality of times while updating the print data in the print buffer and shifting the relative position between the print head and the print medium a plurality of times. It is common to print minutes.
[0007]
However, recently, inexpensive ink-jet printers have come to have a printer which does not have a print buffer having a storage capacity capable of buffering print data for one scan printing width in its own device due to the necessity of reducing product cost. In the ink jet printer having such an apparatus configuration, since the print data for a predetermined print width to be printed in one scan is not stored in the print buffer at the time of starting the printing operation for one scan, During the driving of the recording head for performing the printing operation for the scan, it is necessary to print while receiving the remaining print data not yet stored in the print buffer among the print data for one scan.
[0008]
If the printer cannot drive the recording head as described above and cannot receive the remaining print data of a predetermined print width for one scan to be processed, The print head is returned to the print start position, and after receiving the data for the remaining print width, printing is performed again for the remaining print width of the same scan. May be done.
[0009]
In this part-time printing, a process of driving the recording head a plurality of times (for example, two times) is required for one scan printing, so that not only the printing speed of the printer (here, the time required for printing) decreases, but also The print quality may be degraded due to the time difference between the print timing for the remaining print width and the print timing in the preceding drive, the print position error, and the like.
[0010]
Further, in a printer driver corresponding to an ink jet printer having the above-described device configuration, generally, after creating print data for a print width of one scan of a printhead, the print data is sent to a spooler function managed by the OS. Is passed. For this reason, according to the processing procedure of transferring data to the printer for each print data for one scan print width of the recording head, the above-described parting-out printing is performed except when the CPU processing speed of the host computer is extremely low. It is thought that the frequency of occurrence in printers is reduced.
[0011]
However, depending on the specifications of the spooler function, the print data received from the printer driver may be buffered in a unit unique to the spooler function and transmitted to the printer on the host computer. Even if the printer driver issues a print data output request command to the printer prepared in advance in the operating system, as a result, the print data for a predetermined print width cannot be completely transmitted to the printer, and the spooler function is managed. It has been found that a situation occurs in which the print data to be transmitted in response to the issuance of the output request command remains in the buffer in the host computer. This means that in the above-described inkjet printer which does not include a print buffer having a storage capacity capable of buffering print data for one scan in the apparatus, the above-described part-time printing frequently occurs. As a result, there is a problem that printing cannot be performed quickly at an output timing desired by the printer driver or at an output timing assumed in the design stage of the printer driver.
[0012]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problem, and it is possible for a printer driver to output one scan printing width of a print head at a desired output timing regardless of the specifications of a spooler function provided in an OS. An object of the present invention is to reliably transfer all print data to a printer for each print data.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, a print control device according to the present invention has the following configuration.
[0014]
That is, a print control device that transfers generated print data to a printer using a spool function of an operating system,
After issuing a print data output instruction for the spool function, the system further issues a system instruction capable of controlling the spool function for each predetermined processing unit, so that the print data stored in the spooler function is buffered. Is transmitted to the printer.
[0015]
Further, for example, the printer is an inkjet printer equipped with a recording head,
The predetermined processing unit is a processing timing at which creation of a predetermined amount of print data required for the operation of the recording head (print data for one scan print width of the recording head) is completed.
[0016]
Further, for example, the print data output command includes first and second commands issued before and after instructing a print process of one page of print data,
The print control unit may issue at least the second instruction as a system instruction issued for each of the predetermined processing units.
[0017]
In this case, it is preferable that the print control unit issues the first and second instructions as the system instructions in the order of the second instruction and the first instruction for each of the predetermined processing units. .
[0018]
Alternatively, another configuration of the present invention that achieves the same object is a computer-readable printer driver program,
The print data to be transmitted to the printer is transmitted to a spooler of an operating system, and an instruction for transmitting the print data buffered by the spooler to the printer without leaving the print data is issued.
[0019]
The above object is also achieved by a print data transmission method corresponding to the above-described print control devices.
[0020]
Further, the same object is also achieved by a program code (that is, a printer driver program) for realizing a method corresponding to each of the above-described print control devices by a computer, and a computer-readable storage medium storing the program code. Is also achieved by
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a print control apparatus according to the present invention will be described in detail with reference to the drawings.
[0022]
FIG. 1 is a block diagram illustrating the configuration of a printing system according to the present embodiment. In the present embodiment, the host computer 100 has a function as a print control device that controls the operation of the printer 105. The computer 100 is connected to a printer 105 that is a raster printer (eg, an inkjet printer) having no page description language, a monitor 104 such as a liquid crystal display device, and a keyboard (including a general pointing device) 106. .
[0023]
The host computer 100 includes, as software programs to be executed by the CPU 108, an operating system (OS) 102 having a spool function such as Microsoft Windows (registered trademark) 2000, a word processing function, a spreadsheet function, and an Internet browser. Application software 101 such as functions and various drawing commands (image drawing command, text drawing command, graphics drawing command, etc.) indicating an output image issued to the OS 102 by the application software are processed by a general procedure. Accordingly, a printer driver 103 that creates print data is installed.
[0024]
The host computer 100 includes a central processing unit (CPU) 108, a hard disk (HD) 107, a random access memory (RAM) 109, a read-only memory (ROM) 110, And a data bus 111 for connecting these components.
[0025]
The host computer 100 and the OS 102 operating on the hardware thereof may be, for example, a personal computer and a general OS that are widely used, and thus a detailed description of the present embodiment will be omitted. .
[0026]
Here, the processing procedure between the OS and the banding-type printer driver when the printing process is performed in the printing system in the configuration shown in FIG. 1 will be outlined with reference to FIG.
[0027]
FIG. 2 is a diagram illustrating a processing procedure between the printer driver and the OS in the printing system according to the present embodiment.
[0028]
In FIG. 1, application software 101 on a host computer 100 includes text data classified as text such as characters, graphics data classified as graphics such as figures, and image image data classified as natural images. Are created as output image data representing a document to be printed.
[0029]
To print out the created output image data, the application software 101 issues a print output request to the OS 102. The text data portion is a text drawing command, the graphics data portion is a graphics drawing command, and the image data portion is an image drawing command. It issues to the OS 102 a drawing command group, which is constituted by the command and indicates an output image representing the document to be printed. Then, the OS 102 receives the output request of the application software 101 and issues a print request to the printer driver 103 corresponding to the output printer.
[0030]
When a print request is sent from the OS 102, the printer driver 103 secures a band work area (band memory and band buffer) on the host computer 100, and stores coordinate data (position and capacity) of the secured work area. Band size data) to the OS 102. At this time, the OS 102 issues a drawing command group existing in the buffer of the passed band size to the printer driver 103.
[0031]
Here, the reason for securing the work area for the band is that, in general, in a raster printer having no page description language as described in the present embodiment, the printer driver on the host computer performs the image expansion processing. Since the host computer usually does not have enough storage to expand all drawing commands for one page, the memory is divided into units called "bands" that are divided horizontally and horizontally during image expansion processing. To create an image on top.
[0032]
The printer driver 103 uses the spool function of the OS 102 to transmit print data to the printer. That is, the printer driver 103 sequentially rasterizes a drawing command group from the OS 102 to the band memory in, for example, a 24-bit RGB format. After rasterizing all drawing commands, the printer driver 103 converts the data contents expanded in the band memory into CMYK data for each scan line and performs quantization processing, and then the printer 105 can print. A print data conversion process for converting the data into a predetermined data format is performed. Further, the printer driver 103 issues a print data transmission command using the spooler function of the OS 102 to transfer the print data that has been subjected to the print data processing to the printer 105.
[0033]
The OS 102 repeats the above-described series of processing procedures for a printing target document created by the application software 101 and issues all drawing command groups existing in the page of the document for each band. The driver 103 performs the above-described print data conversion process for each scan line in band units, and thereby transfers all print data to the printer 105 to complete the process.
[0034]
Next, the flow of print data processing by the banding-type printer driver according to the present embodiment will be described in detail with reference to FIGS.
[0035]
FIG. 3 is a diagram conceptually illustrating print data conversion processing performed by the banding-type printer driver according to the present embodiment. 4 and 5 are flowcharts showing print data conversion processing performed by the banding-type printer driver according to the present embodiment, and show the procedure of processing performed by the CPU 108 as the printer driver 103.
[0036]
Here, prior to the description of the individual steps shown in FIGS. 4 and 5, the characteristic points of the present embodiment will be described.
[0037]
In a conventional general printer driver, a StartPagePrinter instruction and an EndPagePrinter instruction are originally used before printing a page (step S2 in the present embodiment) and after processing the page (in the present embodiment). Although issued in step S13), the present applicant has found that the print data buffered by the spooler function of the OS is all transmitted to the printer in response to calling the EndPagePrinter instruction. Therefore, the present embodiment focuses on the function of the EndPagePrinter instruction and, unlike the conventional processing configuration in which the EndPagePrinter instruction is called in page units, in the present embodiment, in the present embodiment, each predetermined processing unit (necessary for the operation of the print head). EndPagePrinter instruction is called each time the creation of a new print data is completed).
[0038]
That is, in the conventional processing procedure,
-At the top of the page, a StartPagePrinter instruction is issued,
・ Send by WritePrinter command according to completion of generation of print data required for operation of print head,
At the end of the page, an EndPagePrinter instruction is issued,
Is made.
[0039]
On the other hand, in the processing procedure according to the present embodiment,
-At the top of the page, a StartPagePrinter instruction is issued,
-After the print data required for the operation of the print head has been generated and transmitted by the WritePrinter command, an EndPagePrinter command is issued,
-After the print data required for the operation of the print head has been generated and transmitted by the WritePrinter command, an EndPagePrinter command is issued,
...
-After the print data required for the operation of the print head has been generated and transmitted by the WritePrinter command, an EndPagePrinter command is issued,
At the end of the page, an EndPagePrinter instruction is issued,
Is made.
[0040]
However, the processing configuration in which the EndPagePrinter instruction is called a plurality of times in the same page as described above is different from the processing procedure in which the EndPagePrinter instruction is called once at the beginning and end of the page, and the EndPagePrinter instruction and the StartPagePrinter instruction are paired. Not used in Therefore, in a preferred embodiment, in order to ensure consistency with the order of these two instructions, each time the generation of print data necessary for the operation of the print head is completed in the same page, the order of the EndPagePrinter instruction and the StartPagePrinter instruction is changed. Then, the two instructions are used in pairs.
[0041]
That is, in a preferred embodiment,
-At the top of the page, a StartPagePrinter instruction is issued,
After the print data required for the operation of the print head has been generated and transmitted by the WritePrinter command, an EndPagePrinter command and a StartPagePrinter command are sequentially issued,
After the print data required for the operation of the print head has been generated and transmitted by the WritePrinter command, an EndPagePrinter command and a StartPagePrinter command are sequentially issued,
...
After the print data required for the operation of the print head has been generated and transmitted by the WritePrinter command, an EndPagePrinter command and a StartPagePrinter command are sequentially issued,
At the end of the page, an EndPagePrinter instruction is issued,
Is made.
[0042]
Note that, in the present embodiment, a processing mode in which an EndPagePrinter instruction and a StartPagePrinter instruction are combined and issued, but this is an example, and in addition, all the print data buffered by the spooler function is transmitted to the printer. Any command that can reduce the occurrence of part-time printing on the printer side can be used instead. For example, in the above-described processing procedure, the StartPage command and the EndPagePrinter command are called many times during the printing process of the same page, so that the management of the number of pages during the printing process in one job is complicated. Become. Therefore, it has been confirmed that the occurrence of part-time printing on the printer side can be reduced by calling an instruction for initializing a structure called an EnumJobs instruction instead of the EndPagePrinter instruction and the StartPagePrinter instruction.
[0043]
Thereby, all the print data buffered by the spooler function can be transmitted to the printer without being left in the buffer.
[0044]
Next, individual steps of the flowcharts shown in FIGS. 4 and 5 that include the above-described characteristic processing will be described.
[0045]
First, upon receiving a print request from the OS 102, the printer driver 103 initializes print information processing in "print job units" in step S1, and stores a band area (unit is pixel, width BandWidth, height) in the memory. Band Height). At this time, the printer driver 103 performs an initialization operation for using the spool function and issues an OpenPrinter instruction.
[0046]
In step S2, the printing information is initialized in "page units", and a variable CurY indicating the current position information in the vertical direction in the entire sheet size is initialized to zero. At this time, an initialization operation for each page when the spool function is used is performed at the same time, and a StartPagePrinter instruction is issued.
[0047]
In step S3, the printer driver 103 initializes print information processing in band units, receives drawing commands to be drawn in the band area from the OS 102 one by one, and executes the resolution of the printer when executing the drawing command. , RGB image data is generated by sequentially rasterizing the RGB 24-bit band memory secured in advance, and the position information (BandX, BandY) of the band memory is acquired (see FIG. 3A). See conceptual diagram).
[0048]
In step S4, the current position information in the vertical direction is initialized with the position information BandY in the vertical direction (CurY = BandY). Also, ScanY indicating the current position information in the vertical direction of the band area is initialized to zero.
[0049]
In step S5, the band memory of the created RGB image data is searched for every scan line in the band from the beginning to the end of the scan line to see if data exists, and the data on the scan line is searched. Is found, the left blank pixel width (Left), and the right blank pixel width (Right) are obtained (see the conceptual diagram shown in FIG. 3B).
[0050]
After determining the Width, Left, and Right on the scan line, if it is determined in step S6 that data exists on the scan line (Width> 0), in step S7, RGB 24-bit data is reserved in advance. The CMYK 32 bits for one scan line are stored after being subjected to color conversion (color reduction processing) to CMYK in a memory for developing the CMYK 32 bits. On the other hand, if it is determined in step S6 that no data exists, the process proceeds to step S11.
[0051]
In step S8, the converted CMYK 32-bit data is subjected to binarization processing, converted into a print command, and print data for one scan line is created.
[0052]
In step S9, it is determined whether the print data has been generated to the extent that it should be output to the printer 105. Here, the size of the print data to be output to the printer 105 is an amount that can be printed by a recording head (not shown) mounted on the printer 105 in one scan in the present embodiment. Then, as a result of this determination, when outputting to the printer 150, the process proceeds to step S10. On the other hand, when not outputting, it jumps to step S11.
[0053]
In step S10, the generated print data is transmitted to the printer 015 using the spooler function of the OS 102. At this time, a WritePrinter command is issued as a print data transmission command to the printer 105 using the spooler function. In this process, transmission of the print data to the printer 105 has been completed.
[0054]
Then, an EndPagePrinter command is issued as a system command prepared in the OS 102, or an EndPagePrinter command and a StartPagePrinter command are issued in order to cause the printer to transmit all print data buffered by the spooler function. I do.
[0055]
In step S11, since the print information processing in scan line units has been completed, the vertical position information in the page and in the band is increased by one.
[0056]
In step S12, if ScanY, which is the vertical position information in the band, is less than BandHeight, which is the band height, the process proceeds to step S5. When this determination is made for all scan lines in one band, ScanY exceeds BandHeight of the band height, and print information processing for each band of the printer driver 103 has been completed. Proceed to step S13.
[0057]
In step S13, when CurY, which is vertical position information in the page, is less than the page length PageHeight, the processing for each band from step S3 is repeated for the page length. Then, when CurY exceeds the page length PageHeight, the print information processing for one page is terminated, the page end processing of the print information is performed, and the process proceeds to step S14. At the time of page end processing of print information processing, an EndPagePrinter instruction is issued to notify the spooler function of page end.
[0058]
If there are a plurality of pages in step S14, the processing from step S2 is repeated until the printing processing of all pages is completed. Then, finally, the band memory secured in step S15 is released, and the processing of one print job ends.
[0059]
<Modification of Embodiment>
Next, a modified example based on the above-described embodiment will be described. In the following description, the same configuration as that of the first embodiment will not be described repeatedly, and will be described focusing on the characteristic portions of this modified example.
[0060]
6 and 7 are flowcharts showing print data conversion processing performed by a banding-type printer driver according to a modification of the present embodiment, and show the procedure of processing performed by the CPU 108 as the printer driver 103.
[0061]
In this modification, between the host computer 100 and the printer 105, print buffer information for identifying whether the printer 105 has a print buffer having a temporary storage area for one scan print width is provided by the host. A case of a system configuration that can be transferred to the computer 100 will be described.
[0062]
In step S21, the above-described print buffer information is obtained from the printer 105.
[0063]
In each of the steps S22 to S36, the processing is performed in substantially the same procedure as the above-described steps S1 to S15 shown in FIGS.
[0064]
However, in this modified example, unlike step S10, in step S31, based on the print buffer information obtained from the printer 105 in step S21,
A case where only a print data transmission command should be issued using the spooler function of the OS 102;
A case where another command should be added after the print data transmission command in the same manner as in step S10 (FIG. 5) described above;
Execute the process of switching. In any case, the print data subjected to the print data conversion process is transferred to the printer 105 by issuing the print data transmission instruction in this step.
[0065]
Therefore, according to the present modification, the print data buffered by the spooler function of the OS 102 can be all transmitted to the printer 105 without being left in the buffer, as in the case of the above-described embodiment. In addition, when it is recognized from the print buffer information that the printer 105 connected to the host computer 100 has a print buffer for one scan print width, another command is issued after the print data transmission command. Since it is not necessary to perform the additional processing, it is possible to prevent an unnecessary increase in processing load on the CPU 108.
[0066]
As described above, in the above-described embodiment and its modifications, when the printer driver 103 uses the spooler function provided in the operating system (OS) 102 to transmit from the host computer 100 to the printer 105, After the processing step of issuing an output request command to the spooler function, another system command is added to generate a predetermined processing unit (every time the creation of print data necessary for the operation of the print head is completed). It is possible to reliably transfer print data to the printer 105 regardless of the specifications of the spooler function.
[0067]
Therefore, in a printer that does not include a print buffer having a storage capacity capable of buffering print data for one scan print width in the apparatus, as described in “Problems to be Solved by the Invention”, When printing while receiving the remaining print data that has not been stored while the recording head performing the printing operation is being driven, a process of driving the recording head a plurality of times (for example, twice) for printing for one scan printing width ( Even in the case where “close-out printing” is employed, according to the function of the printer driver 103 according to the present embodiment, one scan of the recording head of the connected printer can be performed regardless of the specifications of the spooler function. Data transfer to the printer 105 can be reliably performed for each print data of the print width. Compared to it can be reduced and, as a result, it is possible to improve the print quality.
[0068]
The present invention described in each of the embodiments described above as an example supplies the above-described host computer 100 with a computer program capable of realizing the functions of the flowcharts referred to in the description, and then supplies the computer program to the CPU of the device. It is achieved by reading and executing. The computer program supplied to the apparatus may be stored in a readable / writable memory or a storage device such as a hard disk drive.
[0069]
Further, in the above case, the method of supplying the computer program to each device may be a method of installing the computer program in the device via various recording media such as a flexible disk, or a method of supplying the computer program from the outside via a communication line such as the Internet. At present, a general procedure such as a download method can be adopted, and in such a case, the present invention is configured by the code of the computer program or the storage medium.
[0070]
【The invention's effect】
According to the present invention described above, regardless of the specifications of the spooler function provided in the OS, at the output timing desired by the printer driver, all the print data for one scan print width of the print head are output. The print data can be reliably transferred to the printer.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a printing system according to an embodiment.
FIG. 2 is a diagram illustrating a processing procedure between a printer driver and an OS in the printing system according to the embodiment.
FIG. 3 is a diagram conceptually illustrating print data conversion processing performed by a banding-type printer driver according to the embodiment.
FIG. 4 is a flowchart illustrating print data conversion processing performed by a banding-type printer driver according to the embodiment.
FIG. 5 is a flowchart illustrating print data conversion processing performed by a banding-type printer driver according to the embodiment.
FIG. 6 is a flowchart illustrating a print data conversion process performed by a banding-type printer driver according to a modified example of the embodiment.
FIG. 7 is a flowchart illustrating print data conversion processing performed by a banding-type printer driver according to a modification of the embodiment.

Claims (15)

A print control device that transfers the generated print data to a printer using a spool function of an operating system,
After issuing a print data output instruction for the spool function, the system further issues a system instruction capable of controlling the spool function for each predetermined processing unit, so that the print data stored in the spooler function is buffered. A print control unit for transmitting all the print data to the printer. The printer is an inkjet printer equipped with a recording head,
2. The print control apparatus according to claim 1, wherein the predetermined processing unit is processing timing at which creation of a predetermined amount of print data required for operation of the recording head is completed. 2. The print control apparatus according to claim 1, wherein the predetermined amount of print data is print data for one scan print width of the recording head. The print data output command includes:
The first and second commands are issued before and after instructing a print process of one page of print data,
The print control unit includes:
4. The print control apparatus according to claim 1, wherein at least the second instruction is issued as a system instruction issued for each of the predetermined processing units. The print control unit includes:
5. The printing control apparatus according to claim 4, wherein the first and second instructions as the system instructions are issued for each of the predetermined processing units in the order of the second instruction and the first instruction. . The print control unit includes:
Means for obtaining information for identifying whether the printer is equipped with a print buffer having a temporary storage area for one scan printing width,
2. The system according to claim 1, wherein when the printer is determined not to be equipped with the print buffer based on information obtained by the means, the system command is issued for each of the predetermined processing units. The print control device as described in the above. A print data transmission method for transferring generated print data to a printer using a spool function of an operating system,
After issuing a print data output instruction for the spool function, the system further issues a system instruction capable of controlling the spool function for each predetermined processing unit, so that the print data stored in the spooler function is buffered. A print data transmission method, wherein all print data is transmitted to a printer. The printer is an inkjet printer equipped with a recording head,
8. The print data transmission method according to claim 7, wherein the predetermined processing unit is processing timing at which creation of a predetermined amount of print data required for operation of the recording head is completed. 8. The print data transmission method according to claim 7, wherein the predetermined amount of print data is print data for one scan print width of the recording head. The print data output instruction includes first and second instructions issued before and after instructing a print process of one page of print data,
10. The print data transmission method according to claim 7, wherein at least the second instruction is issued as a system instruction issued for each of the predetermined processing units. 8. The print data transmission according to claim 7, wherein the first and second instructions as the system instructions are issued for each of the predetermined processing units in the order of the second instruction and the first instruction. Method. A computer program for issuing an instruction to operate a computer as the print control device according to claim 1. A computer-readable storage medium storing a program code for operating a computer as the print control device according to claim 1. A computer readable computer which transmits print data to be transmitted to a printer to a spooler of an operating system and issues an instruction to cause the printer to transmit the print data remaining in the spooler without leaving the print data. Printer driver program. Transmitting print data to be transmitted to a printer to a spooler of an operating system, and issuing a command to cause the printer to transmit the print data buffered by the spooler without leaving the print data. Method.

Images