Graphics processing systems

A graphics processing, graphics texture technology, applied in image data processing, 3D image processing, 2D image generation and other directions

Active Publication Date: 2010-05-26
ARM LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, not all smooth shapes can be converted to such an implicit form, and this technique in any case requi

Method used

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  • Graphics processing systems
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Examples

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Embodiment Construction

[0221] As mentioned above, the basic premise of the present invention is that a smooth curve is represented by a texture such that sampling a texture on one side of the curve will give sampled texture values ​​less than a certain threshold, while samples on the other side of the curve Sampling of textures for will give sampled texture values ​​greater than this particular threshold.

[0222] figure 1 A first embodiment of such a texture for representing a smooth curve 1 is shown.

[0223] figure 1 a) shows the entire texture at a lower resolution and basically illustrates the principle of having the texture position on each side of curve 1 be set to a different texture value and return a different texture value. figure 1 b) shows figure 1 a) An enlarged view of the texture around curve 1 as it appears with this texture, and in particular shows how the texel values ​​change around curve 1 as it appears with this texture.

[0224] Such as figure 1 As shown, the texels withi...

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Abstract

The invention relates to graphics processing systems. A smooth curve is represented in a graphics texture by setting the texels that are inside the curve 1 to a value greater than a predetermined threshold value and the texels that are outside the curve 1 to a value less than the threshold value (or vice-versa). The texture value returned for a sampled position can thus be used to determine whether the sampled position should be treated as being inside the curve 1 or not. The texture is optimised for sampling using bi-linear filtering.

Description

technical field [0001] The present invention relates to a graphics processing system, and more particularly to the rendering (rendering) of smooth shapes, such as smooth curves, in a graphics processing system. [0002] The invention will be described with particular reference to the processing of three-dimensional graphics, but those skilled in the art will understand that the invention is equally applicable to the processing of two-dimensional graphics. Background technique [0003] As is well known in the art, 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 easier The 3D graphics processing operation is performed. These "primitives" are often in the form of simple polygons such as triangles. [0004] The primitives of the picture to be displayed are often generated by the application program interface of the graphics processing system using graphi...

Claims

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Application Information

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IPC IPC(8): G06T15/10G06T11/20
CPCG06T11/40G06T11/203
Inventor J·尼斯塔德R·霍尔姆
Owner ARM LTD
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