JP2006267190A - Apparatus and method for image display and computer program thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that since there is no off-screen in an inner memory in initial plotting, the off-screen is prepared at first and then an image is plotted on a screen, and thereby a user can not confirm the image during the preparation of the off-screen, and especially in the case that a document requires much time for plotting, user's unpleasantness is increased and the user may doubt the hang-up of an application. <P>SOLUTION: During the development of image data on the off-screen, image data which have already developed on the off-screen are plotted on a display on a stage that the image data satisfy a plotting condition on the way. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image display device, an image display method, and a computer program thereof.

Conventionally, when displaying a document created by various applications on the screen, when scrolling the display part or redrawing the part hidden in other windows, it is stored in the internal memory as an off-screen for quick drawing. The image was stored.
JP 2001-042847 A

  However, in the conventional method, since there is no off-screen in the internal memory when drawing for the first time, since the off-screen is first created and then drawn on the screen, the user cannot check the image during that time, especially the drawing. The time-consuming document causes problems such as increased user discomfort and suspicion of application hangs.

  The present invention has been made paying attention to the above points, and even when there are a lot of drawing contents and time is required for image processing, the user can quickly confirm the document by showing the intermediate state to the user. An object of the present invention is to provide an image display device, an image display method, and a computer program thereof that can reduce user discomfort.

  The present invention has been made in view of the above points, and includes an off-screen expansion unit that expands document image data on an off-screen, a display drawing unit that draws an image expanded on the off-screen on a display, While the drawing elements (characters, line drawings, images, etc.) in the image data are being developed on the off-screen by α (α is an integer of 1 or more), the image data on the off-screen that has already been developed. And a halfway drawing means for drawing on the display when the halfway drawing condition is satisfied. As a result, even when there are many drawing contents and it takes time for image processing, the user can check the document image on the way, thereby reducing discomfort and avoiding suspicion of hang-up.

  According to the present invention, even when there are many drawing contents and time is required for image processing, the user can quickly check the document by showing the intermediate state to the user, and the user's discomfort can be reduced.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

  An example of an image display apparatus according to the present invention is shown in FIG.

  1 is a CPU, 2 is a keyboard for data input, 3 is a display for displaying a document image, 4 is a hard disk for storing a document, 5 is a ROM for storing a program for controlling the apparatus and necessary information in advance, and 6 is various A RAM used as a secure work area, 7 is an off-screen in which document images are secured in the RAM 6 and a drawing unit for drawing on the display 3, and 8 is an off-screen drawing for drawing (drawing) drawing elements in the document one by one on the off-screen. And 9, a display drawing unit that draws the contents expanded (drawn) on the off-screen on the display 3, and 10 a display drawing unit 9 that displays the contents already developed (drawn) off-screen by the off-screen drawing unit 8. Whether to expand (draw) on the display Intermediate drawing determination section for determining whether, 11 is a data bus for transferring various data.

  The CPU 1 draws the document image in the hard disk 4 on the display 3 as shown in the flowchart described later by the control computer program in the ROM 5. In the following embodiments, image processing performed by the above-described image processing apparatus will be specifically described.

  FIG. 2 is a flowchart illustrating image processing according to the first embodiment.

  In step S1 of FIG. 2, (drawing time) is initialized. That is, (drawing time) = 0.

  In step S 2, the document temporarily expanded from the hard disk 4 into the RAM 6 is expanded (drawn) by the off-screen drawing unit 8 in the drawing unit 7 on the off-screen in which the drawing elements α are secured in the RAM 6. The Here, as an example, α = 1. That is, one drawing element such as a line, an image, or a character is developed on the off screen, and the process proceeds to step S3.

  In step S3, the halfway drawing determination unit 10 determines whether the total processing time (drawing time) when drawing on the off-screen in step S2 satisfies the halfway drawing conditions shown in FIG.

  That is, it is determined whether (drawing time) ≧ β msec. However, the threshold value β> 0.

  For example, if β = 500 msec and the total processing time (drawing time) when drawing on the off-screen is 800 msec, the process proceeds to step S4. On the other hand, if the condition is not satisfied, the process proceeds to step S6, and the drawing element is continuously developed off-screen.

  In step S <b> 4, the display drawing unit 9 draws all the contents that have been developed (drawn) off-screen so far on the display 3. Therefore, the user can check the drawing contents processed so far. Then, it progresses to step S5.

  Next, in step S5, (drawing time) is initialized. That is, (drawing time) = 0. Thereafter, the process proceeds to step S6.

  In step S6, it is determined whether all drawing elements have been developed (drawn) off-screen. This is also performed by the halfway drawing determination unit 10 together. If yes, go to step S7. If NO, the process returns to step S2 to develop (draw) α drawing elements on the off-screen.

  In step S7, the display drawing unit 9 draws all the contents that have been developed off-screen on the display 3 and ends the image processing.

  As described above, according to the present embodiment, even when there are a lot of drawing contents and it takes time for image processing, the user can quickly check the document by showing the intermediate state to the user, and the user's unpleasant feeling. A reduced and comfortable image processing apparatus can be provided.

  As Example 2, an example in which the halfway drawing condition is different from that of Example 1 is shown.

  The document temporarily expanded in the RAM 6 from the hard disk 4 in step S1 of FIG. 4 is expanded (drawn) on the off-screen in which one drawing element is secured in the RAM 6 by the off-screen drawing unit 8 in the drawing unit 7. )

In step S2, the halfway drawing determination unit 10 determines whether the drawing elements drawn on the off-screen in step S1 satisfy the halfway drawing conditions. FIG. 5 shows an example of the halfway drawing condition of the second embodiment.
Condition 1: The size of the original drawing element is β bytes or more (β> 0),
Condition 2: When compressed, the size of the decompressed drawing element is γ bytes or more (γ> 0)
If one or more of these conditions are met, the process proceeds to step S3. If neither is satisfied, the process proceeds to step S4.

  For example, it is assumed that a color image is compressed in a document and the size is 150 KB. Also, if β in the halfway drawing condition condition 1 is β = 100 KB, the original drawing element size is 150 KB and the threshold value of 100 KB or more is satisfied, so the process proceeds to step S3, and the content that has been developed off-screen is displayed on the display. draw.

  Similarly, it is assumed that a color image is compressed in the document and the size after decompression is 500 KB. Further, if γ in the condition 2 of the halfway drawing condition is γ = 300 KB, the drawing element size after decompression is 500 KB, and the threshold of 300 KB or more is satisfied. To draw.

  In step S <b> 3, the display drawing unit 9 draws all the contents that have been developed (drawn) off-screen so far on the display 3. Therefore, the user can check the drawing contents processed so far.

  Next, in step S4, it is determined whether all drawing elements have been developed (drawn) off-screen. This is also performed by the halfway drawing determination unit 10 together. If yes, go to step S5. In the case of NO, the process returns to step S1 to develop (draw) one drawing element on the off-screen.

  In step S5, all the contents already developed on the off-screen are drawn on the display 3, and the image processing ends.

  As described above, according to the present embodiment, even when there are a lot of drawing contents and it takes time for image processing, the user can quickly check the document by showing the intermediate state to the user, and the user's unpleasant feeling. A reduced and comfortable image processing apparatus can be provided.

  A third embodiment of the present invention will be described.

FIG. 6 shows another halfway drawing condition used by the halfway drawing determination unit 10 in step S2 of the flowchart of FIG. In this example, the threshold value of each condition is corrected as follows by the OS on which the image processing apparatus is operating, and then the determination in step S2 is performed. FIG. 4 shows an example of Windows (registered trademark).
Condition 1: The size of the original drawing element is β bytes or more (β> 0)
Condition 2: When compressed, the size of the decompressed drawing element is γ bytes or more (γ> 0)
* However, the threshold value of each condition is corrected by the OS as follows.
Windows (registered trademark) 95: 1.0 times Windows (registered trademark) 98: 0.9 times Windows (registered trademark) ME: 0.8 times Windows (registered trademark) NT: 0.7 times Windows (registered trademark) 2000 : 0.6 times Windows (registered trademark) XP: 0.5 times For example, when the OS is Windows (registered trademark) XP, the threshold β of the condition 1 is β × 0.5 = 0.5β. Assume that a color image is compressed in a document and the size is 150 KB. Further, when β in condition 1 of the halfway drawing condition is β = 100 KB, the threshold value is 0.5 × 100 KB = 50 KB. Since the original drawing element size is 150 KB and the threshold value of 50 KB or more is satisfied, the process proceeds to step S3, and the content developed on the off-screen is drawn on the display.

  Similarly, when the OS is Windows (registered trademark) XP, the threshold value γ of Condition 2 is γ × 0.5 = 0.5γ. Assume that a color image is compressed in a document and the size after decompression is 500 KB. If γ in condition 2 of the halfway drawing condition is γ = 300 KB, the threshold value is 0.5 × 300 KB = 150 KB. Since the drawing element size after decompression is 500 KB and the threshold value of 150 KB or more is satisfied, the process proceeds to step S3, and the content that has been developed off-screen is drawn on the display. The same applies to other OSs.

  As described above, the same effects as in the second embodiment can be obtained in the third embodiment.

FIG. 7 shows another halfway drawing condition used by the halfway drawing determination unit 10 in step S2 of the flowchart of FIG. In this example, the threshold value for each condition is corrected as follows according to the number of operating clocks of the CPU, and the determination in step S2 is performed.
Condition 1: The size of the original drawing element is β bytes or more (β> 0)
Condition 2: When compressed, the size of the decompressed drawing element is γ bytes or more (γ> 0)
* However, the threshold value of each condition is corrected as follows according to the number of clocks of the CPU.
(Threshold) = (threshold) × (1 GHz) ÷ (number of CPU clocks)
For example, when the number of operating clocks of the CPU is 0.8 GHz, the threshold value β in Condition 1 is β × 1.0 ÷ 0.8 = 1.25β. Assume that a color image is compressed in a document and the size is 150 KB. Further, when the threshold value β of condition 1 of the halfway drawing condition is β = 100 KB, the threshold value is 1.25 × 100 KB = 125 KB. Since the original drawing element size is 150 KB and the threshold value of 125 KB or more is satisfied, the process proceeds to step S3, and the content developed on the off-screen is drawn on the display. The same processing is performed for other clock numbers.

  As described above, the same effects as in the second embodiment can be obtained in the fourth embodiment.

  FIG. 8 shows another example of a flowchart of image processing. Here, step S61 is performed instead of step S1 of FIG.

  The document temporarily expanded in the RAM 6 from the hard disk 4 in step S61 in FIG. 8 is expanded on the off-screen in which the α drawing elements are secured in the RAM 6 by the off-screen drawing unit 8 in the drawing unit 7 ( Drawn). Here, α is a positive integer.

In step S62, the halfway drawing determination unit 10 determines whether any of the α drawing elements drawn on the off-screen in step S61 satisfies the halfway drawing condition. For example, if the halfway drawing condition of FIG. 5 is used,
Condition 1: The size of the original drawing element is β bytes or more (β> 0)
Condition 2: When compressed, the size of the decompressed drawing element is γ bytes or more (γ> 0)
If any one of the α drawing elements satisfies one or more of these conditions, the process proceeds to step S3. If neither is satisfied, the process proceeds to step S4. The subsequent processing is the same as in the second embodiment.

  As described above, the same effects as in the second embodiment can be obtained in the fifth embodiment.

  If a predetermined number of predetermined conditions is satisfied as the intermediate drawing condition used by the intermediate drawing determination unit 10, the process may proceed to step S3.

  For example, assume that the process proceeds to step S3 when two or more drawing elements that have been developed (drawn) off-screen so far satisfy the condition. In this case, for example, if only condition 1 is satisfied, the process returns to step S1, but if other conditions such as condition 2 are also satisfied, the process proceeds to step S3, and the content that has been developed (drawn) off-screen is drawn on the display. To do. Other steps are the same as those in the second embodiment.

  As described above, the same effects as in the second embodiment can be obtained in the sixth embodiment.

  As described above, according to the present invention, even when there are a lot of drawing contents and time is required for image processing, the user can quickly confirm the document by showing the intermediate state to the user. Pleasure can be reduced.

Diagram showing an example of hardware configuration Flowchart showing image processing of Embodiment 1 The figure which shows the drawing condition in the middle of Example 1 Flowchart showing image processing of second to fourth embodiments The figure which shows the drawing condition in the middle of Example 2 The figure which shows the drawing condition on the way of Example 3 The figure which shows the drawing condition in the middle of Example 4 Flowchart showing image processing of embodiment 5

Explanation of symbols

1 CPU
2 Keyboard 3 Display 4 Hard disk 5 ROM
6 RAM
7 Drawing unit 8 Off-screen drawing unit 9 Display drawing unit 10 Intermediate drawing determination unit 11 Data bus

Claims (8)

Off-screen expansion means for expanding document image data on the off-screen;
Display drawing means for drawing the image developed on the off-screen on a display;
While the drawing elements in the image data are being developed on the off screen by α (α is an integer of 1 or more), the image data on the already developed off screen satisfies the halfway drawing conditions An image display device comprising: an intermediate drawing means for drawing on the display.   The image display apparatus according to claim 1, wherein the halfway drawing condition is equal to or greater than a certain threshold value for a total processing time to be developed on an off-screen.   The image display apparatus according to claim 1, wherein the halfway drawing condition is an original size of a drawing element equal to or greater than a certain threshold value.   2. The image display apparatus according to claim 1, wherein the halfway drawing condition is that a size after decompression is equal to or greater than a certain threshold when the drawing element is compressed.   The image display apparatus according to claim 1, wherein the halfway drawing condition varies depending on a platform OS.   The image display device according to claim 1, wherein the halfway drawing condition changes depending on a number of operation clocks of the CPU. An off-screen expansion step for expanding document image data on the off-screen;
A display drawing step of drawing the image developed on the off-screen on a display;
While the drawing elements in the image data are being developed on the off screen by α (α is an integer of 1 or more), the image data on the already developed off screen satisfies the halfway drawing conditions An image display method for controlling an image display device, comprising: an intermediate drawing step of drawing on a display. An off-screen expansion step for expanding document image data on the off-screen;
A display drawing step of drawing the image developed on the off-screen on a display;
While the drawing elements in the image data are being developed on the off screen by α (α is an integer of 1 or more), the image data on the already developed off screen satisfies the halfway drawing conditions A computer program comprising program code for causing a computer to execute each step of the intermediate drawing step of drawing on a display.