improve sw renderer

demo/mod/palette.fnl

@@ -0,0 +1,263 @@
+(require :pxl8)
+(local ffi (require :ffi))
+
+(local data (ffi.new "u32[256]" [
+  0x080602
+  0x14120E
+  0x23211E
+  0x31302C
+  0x403E3B
+  0x4B4946
+  0x595755
+  0x676664
+  0x767573
+  0x858382
+  0x939290
+  0xA2A09F
+  0xB0AFAE
+  0xBEBDBC
+  0xCDCCCC
+  0xDADAD9
+  0x594625
+  0x544023
+  0x4F3C24
+  0x4C3A22
+  0x453821
+  0x40321F
+  0x3E2F20
+  0x382D1D
+  0x33291E
+  0x30271F
+  0x2F251D
+  0x2D231E
+  0x28211C
+  0x251F1D
+  0x23201A
+  0x221F1B
+  0x646269
+  0x5F5C61
+  0x5C545A
+  0x584F55
+  0x5B514F
+  0x554A47
+  0x4B413F
+  0x423C36
+  0x463D31
+  0x3E352A
+  0x362E25
+  0x2D2922
+  0x26221D
+  0x1C1916
+  0x151310
+  0x100F0D
+  0x8C6F52
+  0x7E6045
+  0x73553B
+  0x715134
+  0xBA8346
+  0xA1723B
+  0x815C2E
+  0x745226
+  0xCC8926
+  0xBB7E22
+  0x9F6B1F
+  0x875A1C
+  0x6E4918
+  0x553712
+  0x3B250D
+  0x24180A
+  0xA34331
+  0x9B3728
+  0x923220
+  0x882E18
+  0x842B16
+  0x772312
+  0x69200D
+  0x5A1C06
+  0x541C04
+  0x4C1A03
+  0x411701
+  0x371000
+  0x2E0D00
+  0x250B00
+  0x1B0600
+  0x130500
+  0x7D5741
+  0x76503A
+  0x6E4C37
+  0x684833
+  0x5D3F2F
+  0x553A2C
+  0x4F3628
+  0x483024
+  0x4A3126
+  0x483025
+  0x432D22
+  0x3C2C22
+  0x352922
+  0x2C241F
+  0x221C1B
+  0x1A1916
+  0x6E4626
+  0x5F4025
+  0x523924
+  0x433322
+  0x352B1E
+  0x28231A
+  0x1A1A14
+  0x1C1815
+  0x96544B
+  0xAC7369
+  0xB48C86
+  0xBCA7A4
+  0xB1BCC2
+  0x9DB0B9
+  0x8A9FAA
+  0x77929F
+  0x738995
+  0x5E7C8B
+  0x4A6C7D
+  0x345E72
+  0x1F4C64
+  0x19445C
+  0x143C51
+  0x10384B
+  0x183748
+  0x1A3341
+  0x192F39
+  0x152B34
+  0x13262E
+  0x101E23
+  0x0E1519
+  0x0B0E10
+  0x896463
+  0x815C5B
+  0x785352
+  0x6F4C4D
+  0x664444
+  0x5F3C3D
+  0x573738
+  0x523233
+  0x442929
+  0x392324
+  0x2D1D1D
+  0x241414
+  0x1A0E0E
+  0x100909
+  0x070403
+  0x000000
+  0x98936F
+  0x918B68
+  0x887F60
+  0x807759
+  0x797055
+  0x73684D
+  0x6B6146
+  0x63593F
+  0x5B523A
+  0x504834
+  0x423D2D
+  0x373226
+  0x2E2B1F
+  0x222018
+  0x161511
+  0x0E0F0A
+  0x9A554F
+  0x904D48
+  0x87453F
+  0x7D4037
+  0x743831
+  0x693329
+  0x612C24
+  0x572720
+  0x4F231A
+  0x441E16
+  0x391914
+  0x2D150F
+  0x22110D
+  0x1A0B06
+  0x0D0403
+  0x040202
+  0x7F77C0
+  0x7770B5
+  0x6E68A8
+  0x686099
+  0x60588C
+  0x575381
+  0x4E4C72
+  0x454263
+  0x3D3957
+  0x34324A
+  0x2C2940
+  0x242135
+  0x1E1928
+  0x16121D
+  0x0C0A12
+  0x050306
+  0x88AF7B
+  0x81A473
+  0x7B9A67
+  0x728E5D
+  0x6D8553
+  0x61794A
+  0x5B7144
+  0x61734B
+  0x586A3D
+  0x4D5E2D
+  0x465422
+  0x3F4D17
+  0x36420E
+  0x2F3507
+  0x272804
+  0x211F02
+  0x1EF708
+  0x3CE10D
+  0x51CC1B
+  0x64B621
+  0x6DA12C
+  0x69882B
+  0x727F3B
+  0xE4DDCE
+  0xEEE6BA
+  0xEAE290
+  0xE9E26D
+  0xE5DE43
+  0xE3DB20
+  0xE1CC18
+  0xDFB911
+  0xDCA60B
+  0xE8A306
+  0xDF9312
+  0xE17B05
+  0xC86815
+  0xBC5908
+  0xB14805
+  0xA63D07
+  0xB6431E
+  0xAA381A
+  0x9A2E12
+  0x8C270F
+  0x892B17
+  0x762311
+  0x5F1F0D
+  0x491B09
+  0x3B1809
+  0xE50F19
+  0x6A34C4
+  0xE00B28
+  0x2B08C8
+  0x322A33
+  0x281C0E
+  0x2F1E15
+  0xD48067
+  0xC26B4C
+  0x974928
+  0x814123
+  0xD5B3A9
+  0xBE9D93
+  0x9A7B6C
+  0x7F5F51
+  0x8E504C
+]))
+
+data