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Graphics processing systems

A graphics processing, graphics texture technology, applied in image data processing, texture/color, 3D image processing, etc., to achieve low-cost effects

Inactive Publication Date: 2015-05-20
ARM LTD
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  • Claims
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Problems solved by technology

However, not all smooth shapes can be converted to this implicit form, and this technique in any case requires dedicated rendering hardware or very high-precision fragment shader hardware for evaluating the implicit curve

Method used

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  • Graphics processing systems
  • Graphics processing systems
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Embodiment Construction

[0274] As mentioned above, the basic premise of the invention is to represent smooth curves in textures such that sampling the texture on one side of the curve will give sampled texture values ​​less than a certain threshold, while sampling the texture on the other side of the curve will give Sampled texture values ​​greater than a certain threshold.

[0275] For ease of illustration, this principle and how a texture is generated is first described with respect to a single smooth curve, followed by the packing of two or more such smooth curves into a single texture according to the invention.

[0276] figure 1 An arrangement of such textures is shown for representing a smooth curve 1 .

[0277] figure 1 a) shows the overall texture at a lower resolution, and basically illustrates the principle of having the texture positions on each side of curve 1 set to and return different texture values. figure 1 b) shows that around the line of curve 1 as it occurs in the texture ...

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Abstract

A smooth curve is represented in a graphics texture by setting the texels that are inside the curve 80 to a value greater than a predetermined threshold value for the curve 80 and the texels that are outside the curve 80 to a value of less than the threshold value for the curve 80 (or vice-versa). Such representations of two smooth curves 80, 81 are packed into a single graphics texture (the same texel space) 82 by giving each curve 80, 81 a different threshold value, setting the texel values so that they are appropriately valued with respect to each curve's threshold value, and ensuring that the positions of the threshold value contours of the two curves do not actually overlap each other in the texture.

Description

technical field [0001] The present invention relates to graphics processing systems, and in particular, to the rendering of smooth shapes, such as smooth curves, in graphics processing systems. Background technique [0002] The invention is described with specific reference to the processing of three-dimensional graphics, but those skilled in the art will appreciate that it is equally applicable to the processing of two-dimensional graphics. [0003] It is known in the art that 3D graphics processing is usually performed by first dividing the scene to be displayed into a number of similar basic components (so-called "primitives") in order to allow 3D graphics processing operations to be performed more easily. These "primitives" generally take the form of simple polygons, such as triangles. [0004] Primitives of a scene to be displayed are usually generated by an API of a graphics processing system using graphics drawing instructions (requests) received from an application ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T15/20G06T11/40G06T11/20
CPCG06T11/203G06T11/001G06T11/40
Inventor J·尼斯塔德R·霍尔姆
Owner ARM LTD
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