發明
中華民國
101106179
I 488142
應用於向量圖形點陣化之階層式緩衝器之運算方法
國立中山大學
2015/06/11
一種應用於向量圖形點陣化之階層式緩衝器之運算方法,其係包含提供一顯示器;提供一階層式緩衝器,該階層式緩衝器係包含有第一階層緩衝區、一第二階層緩衝區及一第三階層緩衝區;清除該第一階層緩衝區、該第二階層緩衝區及該第三階層緩衝區;使該顯示器之螢幕顯示有一向量圖形,若該向量圖形與一掃瞄線相交而產生一交點,則該交點所對應之該第一階層緩衝區之位址的數值係可進行狀態更新,更新後之數值所對應之該第二階層緩衝區及該第三階層緩衝區之位址的旗標係被更新為設定狀態;讀取該第三階層緩衝區且判斷旗標是否為設定或重置狀態,若旗標為重置狀態,則讀取該第三階層緩衝區之下一個旗標,若旗標為設定狀態,則讀取該旗標所對應之該第二階層緩衝區之位址的旗標且判斷旗標是否為設定或重置狀態,若旗標為設定狀態,則讀取該旗標所對應之該第一階層緩衝區。 An operation method of a hierarchical buffer for application of vector graphics rasterization includes providing a hierarchical buffer having a first-level, a second-level and a third-level buffer; clearing the first-level, the second-level and the third-level buffer; making a vector graphic displayed on a screen, when an intersection point is intersected by the vector graphic and a scan-line, a value of address of the first-level buffer corresponded to the intersection point is able to proceed with a state update, wherein flags of the second-level and the third-level buffer corresponded to the updated value are renewed into set; reading the third-level buffer and determining whether each flag can be set or reset, if the flag is indicated as reset, reading the next flag of the third-level buffer, if the flag is indicated as set, reading the flags of the second-level buffer corresponded to the flag of the third-level buffer and determining whether each flag can be set or reset.
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