| Summary: | 碩士 === 國立交通大學 === 電子工程學系 === 85 === Three dimensional computer graphics plays an important role in
the modernmultimedia image applications. Since the texture
mapping technique canincrease the photorealism of the images
synthesized by computers, it iswidely used in the modern 3D
computer graphics. However, texture mappingrequires complex
computation and large memory bandwidth that will affectthe
system performance significantly. A hardware acceleration unit
isrequired to minimize the impact on the system and increase the
throughputof the graphics subsystem. The thesis proposes a
texture mapping hardwarein a 3D graphics processor which
supports OpenGLTM 3D graphics API. Thetexture mapping unit has
the following features: first, it supports all themipmap texture
filtering methods and the true color texture functions definedin
OpenGLTM. Second, the hardware unit uses individual 512K SRAM to
store thetexture maps in order to increase the rendering
performance and minimize thesystem performance degradation.
Third, users can pre-load up to six texturepatterns into the
texture memory to minimize the latency for texture
patternloading while switching among different textures. The
operating frequency ofthe texture mapping hardware is targeted
at 66MHz. Under the circumstance,it delivers maximum 13.2
million true color texture mapped pixels per secondwith the
single-point texture filtering method, and 3.47 million pixels
truecolor texture mapped pixels per second with the most complex
trilinearfiltering method.
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