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Hold the maximum X and Y coordinate in variables instead of calculating them

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when needed. The variables make signed compares in the line clipper easier.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4450 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz
2009-11-06 12:02:52 +00:00
parent eee4430061
commit e319fc217b
4 changed files with 37 additions and 12 deletions
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18
libsrc/tgi/tgi_init.s
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@@ -8,9 +8,13 @@
.include "tgi-kernel.inc"
.include "tgi-error.inc"
.import pushax, pusha
.import pushax, pusha, decax1
.importzp ptr1
;----------------------------------------------------------------------------
.code
.proc _tgi_init
jsr _tgi_done ; Switch off graphics if needed
@@ -22,6 +26,18 @@
inc _tgi_gmode ; Remember that graph mode is active
; Get the maximum X and Y coordinate
jsr _tgi_getxres
jsr decax1
sta _tgi_xmax
stx _tgi_xmax+1
jsr _tgi_getyres
jsr decax1
sta _tgi_ymax
stx _tgi_ymax+1
; Do driver initialization. Set draw and view pages.
lda #0