SPEAR1340 datasheet(25/200 Pages) STMICROELECTRONICS

25 / 200 page

SPEAr1340

Device functions

Doc ID 023063 Rev 4

25/200

2.21

Graphics processing unit (GPU)

The Mali GPU is a hardware accelerator for 2D and 3D graphics systems that forms the

basis of a high performance graphics processing solution. When implemented as part of a

system-on-chip (SoC) device, the GPU forms an integral part of the graphics solution. The

GPU comprises the following:

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an ARM® Mali™200 pixel processor

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a MaliGP2 geometry processor

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a memory management unit (MMU)

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associated software (programmed using OpenVG or OpenGL base layers)

Main features (pixel processor):

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Programmable fragment shader

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Access to framebuffer from fragment shaders

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Alpha blending

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Arbitrary memory reads and writes

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Complete non-power-of-2 texture support

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Cube mapping

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Dynamic recursion

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Fast dynamic branching

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Fast trigonometric functions, including arctangent

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Full floating-point arithmetic

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Framebuffer blend with destination Alpha

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High dynamic range (HDR) textures and framebuffers

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Indexable texture samplers

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Line, quad, triangle, and point sprites

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Multiple render targets

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No limit on program length

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Perspective anisotropic filtering (AF)

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Perspective correct texturing

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Point sampling, bilinear, and trilinear filtering

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Programmable mipmap level-of-detail biasing and replacement

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Stencil buffering, 8-bit

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Two-sided stencil

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Unlimited dependent texture reads

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Virtualized texture samplers

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4-level hierarchical Z and stencil operations

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4 times and 16 times full scene anti-aliasing (FSAA)

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4-bit per texel texture compression.

Geometry processor

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Programmable vertex shader

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Autonomous operation tile list generation

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Flexible input and output formats

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Indexed and non-indexed geometry input

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Primitive constructions with points, lines, triangles and quads.

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