WO2022160946A1

WO2022160946A1 - Text shadow effect processing method and apparatus, device and storage medium

Info

Publication number: WO2022160946A1
Application number: PCT/CN2021/135953
Authority: WO
Inventors: 徐力有; 赵陈翔
Original assignee: 北京字跳网络技术有限公司
Priority date: 2021-01-28
Filing date: 2021-12-07
Publication date: 2022-08-04
Also published as: CN114820874A

Abstract

The present disclosure provides a text shadow effect processing method and apparatus, a device, and a storage medium. The method comprises: after offsetting the positions of pixel points in a signed distance field image of a target text, obtaining a first distance field image, which comprises original pixel points and offset pixel points corresponding to the original pixel points; on the basis of the first distance field image, drawing an initial inner shadow effect image corresponding to the target text; determining a target area composed of offset pixel points in the first distance field image of which distance field values are greater than a preset value; and removing the target area from the initial inner shadow effect image to obtain an inner shadow effect image of the target text. The present disclosure utilizes the feature that pixel points in the signed distance field image of the target text of which distance field values are greater than a preset value are located outside of the target text, and removes the target area composed of pixel points located outside of the target text, thereby drawing the inner shadow effect of the target text.

Description

A text shadow effect processing method, device, device and storage medium

This disclosure claims the priority of the Chinese patent application filed on January 28, 2021 with the application number 202110118989.6 and the invention titled "A method, device, device and storage medium for processing shadow effects of text", all of which are The contents are incorporated by reference in this disclosure.

technical field

The present disclosure relates to the field of data processing, and in particular, to a method, device, device and storage medium for processing shadow effects of characters.

Background technique

At present, the drawing of text effects is applied in more and more fields, such as the scene drawing of online games, the display of subtitles in variety shows, and the display of text in videos, and so on.

The shadow effect of text is a commonly used text effect. How to draw the shadow effect of text is a problem that has attracted much attention at present.

SUMMARY OF THE INVENTION

In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a method, apparatus, device and storage medium for processing shadow effects of characters, which can draw shadow effects of characters based on directional distance field images of characters.

In a first aspect, the present disclosure provides a method for processing shadow effects of text, the method comprising:

After the pixel points in the directional distance field image of the target text are shifted in position, a first distance field image is obtained; wherein, the first distance field image includes the original pixel point and the position offset by the original pixel point. The offset pixels obtained after shifting;

Drawing an initial inner shadow effect image corresponding to the target text based on the first distance field image;

determining a target area formed by the offset pixels whose distance field value in the first distance field image is greater than a preset value;

The target area is removed from the initial inner shadow effect image to obtain an inner shadow effect image of the target text.

In an optional implementation manner, the drawing of the initial inner shadow effect image corresponding to the target text based on the first distance field image includes:

drawing the text body of the target text based on the original pixel point in the first distance field image;

Based on the offset pixels in the first distance field image, the inner shadow of the target text is drawn to obtain an initial inner shadow effect image corresponding to the target text.

In an optional embodiment, the drawing of the inner shadow of the target text based on the offset pixels in the first distance field image includes:

Based on a dot product operation result between the offset coordinates of the offset pixels and the gradient direction vector in the first distance field image, the gradient values of the offset pixels are determined; wherein the offset The shift coordinate is the difference between the position coordinate of the pixel point after the offset and the gradient origin;

Determine the color value of the pixel point after the offset according to the gradient value and the target gradient color;

Based on the color value of the offset pixel, the inner shadow of the target text is drawn.

In an optional embodiment, the method further includes:

Based on the first distance field image, an outer shadow effect image corresponding to the target text is drawn.

In an optional implementation manner, the drawing an outer shadow effect image corresponding to the target text based on the first distance field image includes:

drawing the outer shadow of the target text based on the offset pixels in the first distance field image;

Based on the original pixel points in the first distance field image, the text body of the target text is drawn to obtain an outer shadow effect image corresponding to the target text.

In an optional implementation manner, the drawing on the text body of the target text based on the original pixel points in the first distance field image includes:

Determine the color transparency value of the original pixel point based on the distance field value of the original pixel point in the first distance field image; wherein, the absolute value of the distance field value of the original pixel point and the original pixel point The color transparency value of the point is inversely proportional;

Based on the color transparency value of the original pixel point, the text body of the target text is drawn.

In an optional embodiment, the drawing of the outer shadow of the target text based on the offset pixels in the first distance field image includes:

Based on the color value of the offset pixel, the outer shadow of the target text is drawn.

In an optional implementation manner, before the initial inner shadow effect image corresponding to the target text is drawn based on the first distance field image, the method further includes:

Based on the color transparency value, color mixing is performed on the original pixel point and the offset pixel point with the same position information in the first distance field image.

In a second aspect, the present disclosure provides a text shadow effect processing device, the device comprising:

The offset module is used to obtain a first distance field image after performing position offset on the pixel points in the directional distance field image of the target text; wherein, the first distance field image includes the original pixel points and the The offset pixel point obtained after the original pixel point is shifted by the position;

a first drawing module, configured to draw an initial inner shadow effect image corresponding to the target text based on the first distance field image;

a first determination module, configured to determine a target area formed by the offset pixels whose distance field values in the first distance field image are greater than a preset value;

A removal module, configured to remove the target area from the initial inner shadow effect image to obtain an inner shadow effect image of the target text.

In a third aspect, the present disclosure provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a terminal device, the terminal device is made to implement the above method.

In a fourth aspect, the present disclosure provides a device comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, when the processor executes the computer program, Implement the above method.

In a fifth aspect, the present disclosure provides a computer program product, wherein the computer program product includes a computer program/instruction, and when the computer program/instruction is executed by a processor, the above-mentioned method is implemented.

Compared with the prior art, the technical solutions provided by the embodiments of the present disclosure have at least the following advantages:

An embodiment of the present disclosure provides a method for processing shadow effects of characters. First, after performing position offsets on pixels in a directional distance field image of a target character, a first distance field image is obtained, wherein the first distance field image is The image includes the original pixel point and the offset pixel point obtained by the position offset of the original pixel point. Then, based on the first distance field image, draw the initial inner shadow effect image corresponding to the target text, and then determine the target area composed of the offset pixels whose distance field value in the first distance field image is greater than the preset value, and the target area is The area is removed from the initial inner shadow effect image to obtain the inner shadow effect map of the target text. The present disclosure utilizes the feature that the pixels whose distance field value is greater than the preset value in the directional distance field image of the target character are located in the outer area of the target character, and removes the target area formed by the pixels in the outer area of the target character, thereby achieving the target The drawing of the inner shadow effect of the text.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the accompanying drawings that are required to be used in the description of the embodiments or the prior art will be briefly introduced below. In other words, on the premise of no creative labor, other drawings can also be obtained from these drawings.

1 is a flowchart of a method for processing shadow effects of text according to an embodiment of the present disclosure;

2 is a schematic diagram of an initial inner shadow effect image provided by an embodiment of the present disclosure;

3 is a schematic diagram of an inner shadow effect image of a target text according to an embodiment of the present disclosure;

4 is a schematic diagram of an outer shadow effect image corresponding to a target text according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a text shadow effect processing device according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a text shadow effect processing device according to an embodiment of the present disclosure.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments may be combined with each other under the condition of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, and Not all examples.

At present, the shadow effect of text is usually drawn based on bitmap text, and the directional distance field image records the shortest distance value of each pixel inside and outside the text from the text outline (also called the border), also known as the boundary. called the distance field value. Among them, the distance field value of the pixel points in the inner area of the text is set as a negative number, and the distance field value of the pixel points in the outer area around the text is set as a positive number. The inventors found that the text-based directional distance field image can be more convenient to draw the shadow effect of the text.

To this end, the present disclosure provides a text shadow effect processing method. First, after the pixel points in the directional distance field image of the target text are shifted in position, a first distance field image is obtained, wherein the first distance field image is The image includes the original pixel point and the offset pixel point obtained by the position offset of the original pixel point. Then, based on the first distance field image, draw the initial inner shadow effect image corresponding to the target text, and then determine the target area composed of the offset pixels whose distance field value in the first distance field image is greater than the preset value, and the target area is The area is removed from the initial inner shadow effect image to obtain the inner shadow effect map of the target text. The present disclosure utilizes the feature that the pixels whose distance field value is greater than the preset value in the directional distance field image of the target character are located in the outer area of the target character, and removes the target area formed by the pixels in the outer area of the target character, thereby achieving the target The drawing of the inner shadow effect of the text.

Based on this, an embodiment of the present disclosure provides a method for processing shadow effects of text. Referring to FIG. 1 , a flowchart of a method for processing shadow effects of text provided by an embodiment of the present disclosure includes:

S101: After performing position offset on the pixel points in the directional distance field image of the target character, a first distance field image is obtained; wherein, the first distance field image includes the original pixel points and the pixels passing through the original pixel points. The offset pixel point obtained after the position offset.

In the embodiment of the present disclosure, the offset vector of the shadow effect is predetermined, which is used to represent the offset direction and offset distance of the shadow effect, and the like. For example, the offset vector can be (shadowOffsetX, shadowOffsetY), where shadowOffsetX is used to represent the offset distance of the shadow effect relative to the text body in the X-axis direction, and shadowOffsetY is used to represent the shadow effect relative to the text body in the Y-axis direction offset distance.

In practical applications, for any pixel point (x, y) in the directional distance field image of the target text, after the position offset is performed based on the offset vector (shadowOffsetX, shadowOffsetY), the obtained offset pixel point is (x -shadowOffsetX, y-shadowOffsetY). The pixel point (x, y) is called the original pixel point, and the pixel point (x-shadowOffsetX, y-shadowOffsetY) is the offset pixel point corresponding to the original pixel point (x, y). After each pixel point in the directional distance field image of the target character has completed the position shift, a first distance field image including the original pixel point and the shifted pixel point is obtained.

S102: Based on the first distance field image, draw an initial inner shadow effect image corresponding to the target text.

In the embodiment of the present disclosure, after the first distance field image is determined, an initial shadow effect image corresponding to the target text is drawn based on the original pixel point on the first distance field image and the distance field value of the offset pixel point.

In an optional implementation manner, first, the text body of the target text may be drawn based on the original pixel points in the first distance field image. After the text body is drawn, the inner shadow of the text body of the target text is initially drawn based on the offset pixels in the first distance field image to obtain an initial inner shadow effect image corresponding to the target text. By controlling the sequence of drawing levels, the text body is drawn below the shadow, so that the text body is blocked by the shadow, so that the text body has an inner shadow drawing effect.

In practical applications, before the text body is drawn, the color value of each original pixel can also be determined, and then the text body of the target text is drawn based on the original pixel with the color value. In addition, before the inner shadow of the text body of the target text is drawn, the color value of the offset pixel can be determined first, and then the inner shadow of the text body of the target text can be drawn based on the offset pixel with the color value. Obtain the initial inner shadow effect image corresponding to the target text. Based on the above method, the text body and inner shadow with color can be drawn.

In addition, if both the original pixel point and the offset pixel point with the same position information in the first distance field image have a color transparency value, then based on the color transparency value, the original pixel point and the offset pixel point with the same position information can be processed. Color mixing. The manner of performing color mixing based on the color transparency value is not limited in this embodiment of the present disclosure.

In an optional implementation manner, the text body in the initial inner shadow effect image corresponding to the target text may be drawn as a light-emitting effect. Specifically, before the text body is drawn, the color transparency value of the original pixel is determined based on the distance field value of the original pixel in the first distance field image, wherein the distance field value is inversely proportional to the color transparency value, that is, the distance from the text The farther the body is, the lower the color transparency is, so that the text glow effect is realized. Then, based on the color transparency value of the original pixel, the text body of the target text is drawn.

In another optional implementation manner, the inner shadow effect in the initial inner shadow effect image corresponding to the target text may be drawn as a gradient color effect. Specifically, before drawing the inner shadow of the target text, the gradient of the offset pixel is determined based on the dot product operation result between the offset coordinates of the offset pixel in the first distance field image and the gradient direction vector value. The offset coordinate is the difference between the position coordinate of the offset pixel and the gradient origin. Then, combine the gradient value and the target gradient color to determine the color value of the pixel point after the offset, and then draw the inner shadow of the target text based on the color value of the pixel point after the offset.

Among them, the target gradient color is usually two colors, such as white and black, and the gradient color effect is the effect of gradient from black to white, or the effect of gradient from black to white. The origin of the gradient is usually the center point of the text body, which is specifically used to determine the transition point from one color to another in the target gradient color.

S103: Determine a target area formed by the offset pixels whose distance field values in the first distance field image are greater than a preset value.

Wherein, the preset threshold may be set based on the requirements for the inner shadow effect, and specifically, the preset threshold may be 0, or may also be a value between 0 and 0.5.

In the embodiment of the present disclosure, in the inner shadow effect drawn based on the offset pixels in the first distance field image, there is an area that does not overlap with the text body. As shown in FIG. Schematic of the initial inner shadow effect image. In order to ensure the inner shadow drawing effect of the target text, the embodiment of the present disclosure needs to cut out the area that does not overlap with the text body.

To this end, the embodiment of the present disclosure determines, based on the characteristic that the distance field value of the pixels located in the outer area of the text in the directional distance field image is negative, the distance field value in the first distance field image is greater than a preset value (for example, 0). The target area composed of pixels after offset.

S104: Remove the target area from the initial inner shadow effect image to obtain an inner shadow effect image of the target text.

In the embodiment of the present disclosure, the target area is composed of offset pixels with a distance field value greater than a preset value, wherein the offset pixels with a distance field value greater than the preset value are located in an outer area around the target text. In order to realize the inner shadow effect of the target text, it is necessary to remove the offset pixels whose distance field value is greater than the preset value in the outer area around the target text.

For this reason, after determining the target area in the embodiment of the present disclosure, the target area is removed from the initial inner shadow effect image, so as to ensure that there is no area that does not overlap with the text body in the finally obtained inner shadow effect image, so as to ensure that the target text does not overlap. Inner shadow effect. FIG. 3 is a schematic diagram of an inner shadow effect image of a target text according to an embodiment of the present disclosure.

In the text shadow effect processing method provided by the embodiment of the present disclosure, firstly, after performing position offset on the pixel points in the directional distance field image of the target text, a first distance field image is obtained, wherein, in the first distance field image Including the original pixel point and the offset pixel point obtained by the position offset of the original pixel point. Then, based on the first distance field image, draw the initial inner shadow effect image corresponding to the target text, and then determine the target area composed of the offset pixels whose distance field value in the first distance field image is greater than the preset value, and the target area is The area is removed from the initial inner shadow effect image to obtain the inner shadow effect map of the target text. The embodiment of the present disclosure utilizes the feature that the pixels whose distance field value is greater than the preset value in the directional distance field image of the target character are located in the outer area of the target character, and removes the target area formed by the pixels located in the outer area of the target character. The inner shadow effect of the target text is drawn.

Embodiments of the present disclosure also provide a method for processing an outer shadow effect of a target character. Specifically, an outer shadow effect image corresponding to the target character is drawn based on a first distance field image, wherein the outer shadow effect may be drawn by an outer shadow. Draw, and then draw the text body.

In an optional implementation manner, first, the outer shadow of the target text is drawn based on the offset pixels in the first distance field image; then, based on the offset pixels in the first distance field image; For the original pixel point, the text body of the target text is drawn to obtain an outer shadow effect image corresponding to the target text. As shown in FIG. 4 , it is a schematic diagram of an outer shadow effect image corresponding to a target text according to an embodiment of the present disclosure.

By controlling the order of drawing levels, the text body is drawn above the shadow, so that the shadow is blocked by the text body, so that the text body has an outer shadow drawing effect.

It is worth noting that, in the first distance field image used to draw the outer shadow effect image corresponding to the target text, the offset vector and the offset distance used to offset the pixel point may be different from the inner shadow effect drawing.

In an optional embodiment, when the outer shadow effect of the target text is drawn, the text body in the initial outer shadow effect image corresponding to the target text may be drawn as a luminous effect. Specifically, before the text body is drawn, the color transparency value of the original pixel is determined based on the distance field value of the original pixel in the first distance field image, wherein the distance field value is inversely proportional to the color transparency value, that is, the distance from the text The farther the body is, the lower the color transparency is, so that the text glow effect is realized. Then, based on the color transparency value of the original pixel, the text body of the target text is drawn.

In another optional implementation manner, the outer shadow effect in the initial outer shadow effect image corresponding to the target text may be drawn as a gradient color effect. Specifically, before drawing the outer shadow of the target text, the gradient of the offset pixel is determined based on the dot product operation result between the offset coordinates of the offset pixel and the gradient direction vector in the first distance field image value. The offset coordinate is the difference between the position coordinate of the offset pixel and the gradient origin. Then, combined with the gradient value and the target gradient color, the color value of the offset pixel is determined, and finally, based on the color value of the offset pixel, the outer shadow of the target text is drawn.

In the text shadow effect processing method provided by the embodiment of the present disclosure, not only the inner shadow effect of the target text can be drawn based on the directional distance field image of the target text, but also the outer shadow of the target text can be drawn based on the directional distance field image of the target text effect, which satisfies the user's processing needs for the text shadow effect.

Based on the same inventive concept as the above method embodiments, the present disclosure also provides a text shadow effect processing device. Referring to FIG. 5 , a schematic structural diagram of a text shadow effect processing device provided in an embodiment of the present disclosure, the The device includes:

The offset module 501 is used to obtain a first distance field image after performing position offset on the pixel points in the directional distance field image of the target text; wherein, the first distance field image includes the original pixel point and the The offset pixel point obtained by the original pixel point after the position offset;

a first drawing module 502, configured to draw an initial inner shadow effect image corresponding to the target text based on the first distance field image;

A first determination module 503, configured to determine a target area formed by the offset pixels whose distance field value in the first distance field image is greater than a preset value;

The removing module 504 is configured to remove the target area from the initial inner shadow effect image to obtain an inner shadow effect image of the target text.

In an optional implementation manner, the first drawing module includes:

a first drawing sub-module for drawing the text body of the target text based on the original pixel in the first distance field image;

The second drawing sub-module is configured to draw the inner shadow of the target text based on the offset pixels in the first distance field image, to obtain an initial inner shadow effect image corresponding to the target text.

In an optional embodiment, the device further includes:

The second drawing module is configured to draw an outer shadow effect image corresponding to the target text based on the first distance field image.

In an optional implementation manner, the second drawing module includes:

a third drawing sub-module for drawing the outer shadow of the target text based on the offset pixels in the first distance field image;

The fourth drawing sub-module is configured to draw the text body of the target text based on the original pixel points in the first distance field image to obtain an outer shadow effect image corresponding to the target text.

In an optional embodiment, the first drawing sub-module or the fourth drawing sub-module includes:

a first determination submodule, configured to determine the color transparency value of the original pixel point based on the distance field value of the original pixel point in the first distance field image; wherein, the distance field value of the original pixel point Inversely proportional to the color transparency value of the original pixel;

The fifth drawing sub-module is configured to draw the text body of the target text based on the color transparency value of the original pixel.

In an optional embodiment, the second drawing submodule includes:

The second determination sub-module is configured to determine, based on the dot product operation result between the offset coordinates of the offset pixel points and the gradient direction vector in the first distance field image, the offset value of the offset pixel point. Gradient value; wherein, the offset coordinate is the difference between the position coordinate of the pixel point after the offset and the gradient origin;

a third determination submodule, configured to determine the color value of the pixel after the offset according to the gradient value and the target gradient color;

The sixth drawing sub-module is used for drawing the inner shadow of the target text based on the color value of the pixel after the offset.

In an optional embodiment, the third drawing sub-module includes:

The fourth determination sub-module is configured to determine, based on the dot product operation result between the offset coordinates of the offset pixel point and the gradient direction vector in the first distance field image, the offset value of the offset pixel point. Gradient value; wherein, the offset coordinate is the difference between the position coordinate of the pixel point after the offset and the gradient origin;

The fifth determination submodule is used to determine the color value of the pixel point after the offset according to the gradient value and the target gradient color;

The seventh drawing sub-module is configured to draw the outer shadow of the target text based on the color value of the offset pixel.

In an optional embodiment, the device further includes:

A mixing module, configured to perform color mixing on the original pixel points with the same position information in the first distance field image and the shifted pixel points based on the color transparency value.

In the text shadow effect processing device provided by the embodiment of the present disclosure, firstly, after performing position offset on the pixel points in the directional distance field image of the target text, a first distance field image is obtained, wherein, in the first distance field image Including the original pixel point and the offset pixel point obtained by the position offset of the original pixel point. Then, based on the first distance field image, draw the initial inner shadow effect image corresponding to the target text, and then determine the target area formed by the offset pixels whose distance field value in the first distance field image is greater than the preset value, and the target area is The area is removed from the initial inner shadow effect image to obtain the inner shadow effect map of the target text. The embodiment of the present disclosure utilizes the feature that the pixels whose distance field value is greater than the preset value in the directional distance field image of the target character are located in the outer area of the target character, and removes the target area formed by the pixels in the outer area of the target character, so as to realize The inner shadow effect of the target text is drawn.

In addition to the above method and apparatus, embodiments of the present disclosure also provide a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a terminal device, the terminal device is made to implement the present invention. The method for processing the shadow effect of text according to the embodiment is disclosed.

Embodiments of the present disclosure further provide a computer program product, including computer programs/instructions, which, when executed by a processor, implement the method for processing shadow effects of characters described in the embodiments of the present disclosure.

In addition, an embodiment of the present disclosure also provides a text shadow effect processing device, as shown in FIG. 6 , which may include:

Processor 601 , memory 602 , input device 603 and output device 604 . The number of processors 601 in the text shadow effect processing device may be one or more, and one processor is taken as an example in FIG. 6 . In some embodiments of the present disclosure, the processor 601 , the memory 602 , the input device 603 and the output device 604 may be connected by a bus or in other ways, wherein the connection by a bus is taken as an example in FIG. 6 .

The memory 602 can be used to store software programs and modules, and the processor 601 executes various functional applications and data processing of the text shadow effect processing device as shown in the present disclosure by running the software programs and modules stored in the memory 602 . The memory 602 may mainly include a stored program area and a stored data area, wherein the stored program area may store an operating system, an application program required for at least one function, and the like. Additionally, memory 602 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. The input device 603 may be used to receive input numerical or character information, and to generate signal input related to user settings and function control of the text shading effect processing device.

Specifically in this embodiment, the processor 601 loads the executable files corresponding to the processes of one or more application programs into the memory 602 according to the following instructions, and the processor 601 executes the executable files stored in the memory 602 application, so as to realize various functions of the above-mentioned text shadow effect processing device.

It should be noted that, in this document, relational terms such as "first" and "second" etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is no such actual relationship or sequence between entities or operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The above descriptions are only specific embodiments of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

A method for processing shadow effects of characters, characterized in that the method comprises:

After the pixel points in the directional distance field image of the target text are shifted in position, a first distance field image is obtained; wherein, the first distance field image includes the original pixel point and the position offset by the original pixel point. The offset pixels obtained after shifting;

Drawing an initial inner shadow effect image corresponding to the target text based on the first distance field image;

determining a target area formed by the offset pixels whose distance field value in the first distance field image is greater than a preset value;

The target area is removed from the initial inner shadow effect image to obtain an inner shadow effect image of the target text.
The method according to claim 1, wherein the drawing an initial inner shadow effect image corresponding to the target text based on the first distance field image comprises:

drawing the text body of the target text based on the original pixel point in the first distance field image;

Based on the offset pixels in the first distance field image, the inner shadow of the target text is drawn to obtain an initial inner shadow effect image corresponding to the target text.
The method according to claim 2, wherein the drawing the inner shadow of the target text based on the offset pixels in the first distance field image comprises:

Based on a dot product operation result between the offset coordinates of the offset pixels and the gradient direction vector in the first distance field image, the gradient values of the offset pixels are determined; wherein the offset The shift coordinate is the difference between the position coordinate of the pixel point after the offset and the gradient origin;

Determine the color value of the pixel point after the offset according to the gradient value and the target gradient color;

Based on the color value of the offset pixel, the inner shadow of the target text is drawn.
The method according to claim 1, wherein the method further comprises:

Based on the first distance field image, an outer shadow effect image corresponding to the target text is drawn.
The method according to claim 4, wherein the drawing an outer shadow effect image corresponding to the target text based on the first distance field image comprises:

drawing the outer shadow of the target text based on the offset pixels in the first distance field image;

Based on the original pixel points in the first distance field image, the text body of the target text is drawn to obtain an outer shadow effect image corresponding to the target text.
The method according to claim 2 or 5, wherein the drawing the text body of the target text based on the original pixel points in the first distance field image comprises:

Determine the color transparency value of the original pixel point based on the distance field value of the original pixel point in the first distance field image; wherein, the absolute value of the distance field value of the original pixel point and the original pixel point The color transparency value of the point is inversely proportional;

Based on the color transparency value of the original pixel point, the text body of the target text is drawn.
The method according to claim 5, wherein the drawing the outer shadow of the target text based on the offset pixels in the first distance field image comprises:

Based on a dot product operation result between the offset coordinates of the offset pixels and the gradient direction vector in the first distance field image, the gradient values of the offset pixels are determined; wherein the offset The shift coordinate is the difference between the position coordinate of the pixel point after the offset and the gradient origin;

Determine the color value of the pixel point after the offset according to the gradient value and the target gradient color;

Based on the color value of the offset pixel, the outer shadow of the target text is drawn.
The method according to claim 1, wherein before the drawing the initial inner shadow effect image corresponding to the target text based on the first distance field image, the method further comprises:

Based on the color transparency value, color mixing is performed on the original pixel point and the shifted pixel point with the same position information in the first distance field image.
A device for processing shadow effects of characters, characterized in that the device comprises:

The offset module is used to obtain a first distance field image after performing position offset on the pixel points in the directional distance field image of the target text; wherein, the first distance field image includes the original pixel points and the The offset pixel point obtained after the original pixel point is shifted by the position;

a first drawing module, configured to draw an initial inner shadow effect image corresponding to the target text based on the first distance field image;

a first determination module, configured to determine a target area formed by the offset pixels whose distance field values in the first distance field image are greater than a preset value;

A removal module, configured to remove the target area from the initial inner shadow effect image to obtain an inner shadow effect image of the target text.
A computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium, and when the instructions are executed on a terminal device, the terminal device is made to implement any one of claims 1-8. the method described.
A device, characterized in that it comprises: a memory, a processor, and a computer program stored in the memory and running on the processor, when the processor executes the computer program, the computer program as claimed in the claims is realized. The method of any one of 1-8.
A computer program product, characterized in that, the computer program product includes a computer program/instruction, and when the computer program/instruction is executed by a processor, the method according to any one of claims 1-8 is implemented.