I Unlted States Patent [19] [11] Patent Number: 4,837,447 Pierce et al. [45] Date of Patent: Jun. 6, 1989 [54] RASTERIZATION SYSTEM FOR 4,538,232 8/1985 Koyama ....................... .. 250/492.22 CONVERTING POLYGONAL PATTERN 4,594,673 6/1986 Holly INTO A Err-MAP 1,2224‘; 122222 [75] Inventors: John L. Pierce, Hillsborough; Nick 4:635:208 1/1987 Coleby et al. . 364/491 Kanopoulos, Durham, both of NC. 4,709,231 11/1987 Sakaibara ct a1. ................. .. 340/747 [73] Assignee: Research Triangle Institute, Inc., Primary Examiner-Janice A. Howell Research Triangle Park, N_C, Assistant Examiner-7.1 Ohn A. Miller Attorney, Agent, or Firm-Oblon, Fisher, Spivak, [211 APP1-N°-= 860,216 McClelland & Maier [22] Filed: May 6, 1986 [57] ABSTRACT [51] Int. Cl.4 ........... ., ................................ .. G21K 1/00 A reauime rasterization System for convert-mg plural [52] US‘ Cl‘ _ "" " 2_50€:92'2;_250/398; polygonal pattern data into respective bits of a two-di _ 382/56’ 364/490’ 364/491’ 3256521’ mensional bit-map, wherein the respective bits of the [58] Field of Scarf; .... 24293-38’2 bit-map and the locations thereof within the bit-map 364/ 8’ 89’ ’ 9 ’ ’ ’ 340/24,; correspond to the shapes and locations of the polygons in a two-dimensional ?eld and wherein the bit-map is [56] References Cited divided into plural data stripes, each including plural Us PATENT DOCUMENTS scan hnes having plural bits. The rasterization system converts the plural pattern data of a data stripe into ........................... -. plural linked data entries Such data entries ‘M43597 3/ Yas‘llda correspond to polygons intersecting the same scan line 4’14 337 4/ Bue 9w ct ' / ‘ are sequentially linked, and includes a double buffer 4,258,265 3/1981 Sun-11 ............ .. 250/4923 tt d t f t . th 1 a1 1. k d d 4,259,724 3/1981 Sugiyama . . . . . . . . . . . .. 364/491 Pa ‘Fm a a memory °‘ 5 “m5 _ e P “Y m 6 6m 4,267,456 5/1981 Hidai et aL ____ __ 250/398 entries; a processor for determining for each scan line 4,280,136 7/1931 Hidai et a1_ 250/492” the bits thereof intersected by each polygon represented 4,291,231 9/1981 Hidai et al. 250/4923 by the respective linked data entries and for producing 4,387,433 6/1983 Cardenia et al. .. 250/4922 bit-map data corresponding to the determined bits; a 4’433'334 2/1984 Berri?!" et 31' ---- -- 364/”!90 double-buffer bit-map memory coupled to the processor 49445939 4/1984 Yew ----------- " 250/4922 for storing the bit-map data for each scan line of the 52:‘: et a1‘ data stripe; and a double-buffer output register for read 4,489,241 12/1984 Matsuda 250 A921 mg out sequentlally the bit-map data stored in the bit 4,511,980 4/1985 Watanabe ....... .. 364/491 map memOrY 4,528,634 7/1985 Nakahata et al. 364/491 4,532,598 7/1985 Shibayarna et al. .............. ,. 250/398 56 Claims, 19 Drawing Sheets SLOPES srAnr/sma smr/srw mm’. xomw mmm nav=4 | 4 PRoa/uusms: M’? l 3 now. 0721, 1m, 0701 I2) ' 1 now. R0, (R2), 1m a) | A ACBL R3, #20, R0, 2: I4) I a I 1 =10 ' 2 I 71 I 113- xuv-lo ’ 32767 4 l) WSORTE FA T THW 17A TA
Transcript
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Unlted States Patent [19] [11] Patent Number: 4,837,447 Pierce et al. [45] Date of Patent: Jun. 6, 1989
[54] RASTERIZATION SYSTEM FOR 4,538,232 8/1985 Koyama ....................... .. 250/492.22
CONVERTING POLYGONAL PATTERN 4,594,673 6/1986 Holly INTO A Err-MAP 1,2224‘; 122222 [75] Inventors: John L. Pierce, Hillsborough; Nick 4:635:208 1/1987 Coleby et al. . 364/491
Kanopoulos, Durham, both of NC. 4,709,231 11/1987 Sakaibara ct a1. ................. .. 340/747
[73] Assignee: Research Triangle Institute, Inc., Primary Examiner-Janice A. Howell Research Triangle Park, N_C, Assistant Examiner-7.1 Ohn A. Miller
[51] Int. Cl.4 ........... ., ................................ .. G21K 1/00 A reauime rasterization System for convert-mg plural
[52] US‘ Cl‘ _ "" " 2_50€:92'2;_250/398; polygonal pattern data into respective bits of a two-di _ 382/56’ 364/490’ 364/491’ 3256521’ mensional bit-map, wherein the respective bits of the
[58] Field of Scarf; .... 24293-38’2 bit-map and the locations thereof within the bit-map 364/ 8’ 89’ ’ 9 ’ ’ ’ 340/24,; correspond to the shapes and locations of the polygons
in a two-dimensional ?eld and wherein the bit-map is [56] References Cited divided into plural data stripes, each including plural
Us PATENT DOCUMENTS scan hnes having plural bits. The rasterization system converts the plural pattern data of a data stripe into
........................... -. plural linked data entries Such data entries ‘M43597 3/ Yas‘llda correspond to polygons intersecting the same scan line 4’14 337 4/ Bue 9w ct ' / ‘ are sequentially linked, and includes a double buffer 4,258,265 3/1981 Sun-11 ............ .. 250/4923 tt d t f t . th 1 a1 1. k d d 4,259,724 3/1981 Sugiyama . . . . . . . . . . . .. 364/491 Pa ‘Fm a a memory °‘ 5 “m5 _ e P “Y m 6 6m
4,267,456 5/1981 Hidai et aL ____ __ 250/398 entries; a processor for determining for each scan line 4,280,136 7/1931 Hidai et a1_ 250/492” the bits thereof intersected by each polygon represented 4,291,231 9/1981 Hidai et al. 250/4923 by the respective linked data entries and for producing 4,387,433 6/1983 Cardenia et al. .. 250/4922 bit-map data corresponding to the determined bits; a 4’433'334 2/1984 Berri?!" et 31' ---- -- 364/”!90 double-buffer bit-map memory coupled to the processor 49445939 4/1984 Yew ----------- " 250/4922 for storing the bit-map data for each scan line of the
52:‘: et a1‘ data stripe; and a double-buffer output register for read 4,489,241 12/1984 Matsuda 250 A921 mg out sequentlally the bit-map data stored in the bit 4,511,980 4/1985 Watanabe ....... .. 364/491 map memOrY 4,528,634 7/1985 Nakahata et al. 364/491 4,532,598 7/1985 Shibayarna et al. .............. ,. 250/398 56 Claims, 19 Drawing Sheets
SLOPES srAnr/sma smr/srw mm’. xomw mmm nav=4
| 4 PRoa/uusms: M’?
l 3 now. 0721, 1m, 0701 I2) ' 1 now. R0, (R2), 1m a) | A ACBL R3, #20, R0, 2: I4)
I a I 1 =10
' 2
I 71
I 113- xuv-lo ’ 32767 4
l)
WSORTE FA T THW 17A TA
4,837,447
X DIMENSION OF S TR/PE
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US. Patent Jun. 6, 1989
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US. Patent Jun. 6, 1989 Sheet 2 of 19 4,837,447
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US. Patent Jun. 6, 1989 Sheet 5 of 19 4,837,447
FIELDS (ALL 32 BIT WORDS)
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POINTER OR XM/N BOTTOM ' TOP T OR AND BOTTOM SLOPES
STOP IS TAR T CURRENT START AND STOP (BIT ADDRESSES) START ORLG/NAL START AND STOP (BIT ADDRESSES)
CALCULA TE NEW XOR/GIN XOR/6W = XOR/GIN + INTERVAL —/- “00L? 24m”, 20”?”
r 228 CALCULA TE NEW XMAX XMAX = XMAX I [NTERVAL __/'- IADDWZ 26IRI, IO?R/II
229) CE T I6 MOST SIGNIFICANT BITS OF THE NEW XOR/GIN VALUE FOR THIS POL YGON _/— IMOVZWL 22IRII, R5}
{230 R5 -- WHERE IN STA TIC LIST / (MOVL (R4 [R54 R” DA TA ENTRY SHOULD BE IN- ‘ SERTED. SA VE S T LH A T THIS X POSITION, Le. THE XOR/GIN OF THIS DA TA ENTRY
IMKOVL RI, (R4) [R511 l,23/ INSERT THIS CURRENT DA TA ENTRY IN XORIGINIII S TLH
UPDA TE FORWARD POINTER 4S’ TO NEXT DA TA ENTRY IN
