mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Sculptrix/sculptrix/sh/border

   1 ;
   2 ; border.sh
   3 ;
   4 ; Plots borders given an icon block and a definition of the border shape
   5 ;
   6 ; © 1995-1998 Straylight
   7 ;
   8
   9 ;----- Licensing note -------------------------------------------------------
  10 ;
  11 ; This file is part of Straylight's Sculptrix.
  12 ;
  13 ; Sculptrix is free software; you can redistribute it and/or modify
  14 ; it under the terms of the GNU General Public License as published by
  15 ; the Free Software Foundation; either version 2, or (at your option)
  16 ; any later version.
  17 ;
  18 ; Sculptrix is distributed in the hope that it will be useful,
  19 ; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ; GNU General Public License for more details.
  22 ;
  23 ; You should have received a copy of the GNU General Public License
  24 ; along with Sculptrix.  If not, write to the Free Software Foundation,
  25 ; 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26
  27 ;----- Overview -------------------------------------------------------------
  28 ;
  29 ; Functions provided:
  30 ;
  31 ;  border_plot
  32
  33                 [       :LNOT::DEF:border__dfn
  34                 GBLL    border__dfn
  35
  36 ; --- border_plot ---
  37 ;
  38 ; On entry:     R0 == pointer to border defintion
  39 ;               R1 == pointer to icon block
  40 ;               R2,R3 == window origin position
  41 ;               R4 == pointer to colour table
  42 ;               R5 == group box title width (optional)
  43 ;               R6 == group box title address (optional)
  44 ;
  45 ; On exit:      May return an error
  46 ;
  47 ; Use:          Plots a border using the border definition.
  48
  49                 IMPORT  border_plot
  50
  51 ;----- Command codes --------------------------------------------------------
  52 ;
  53 ; We try to organise these in a way which makes it easy to decode.  The
  54 ; bottom two bits end up as an immediate operand in most cases, allowing us
  55 ; to select entries in the icon bounding box easily.
  56
  57                 ^       -4
  58
  59                 #       4
  60 bCmd_ret        EQU     {VAR}                   ;End border operation
  61
  62                 #       4
  63 bCmd_ldix0      EQU     {VAR}+0                 ;Fetch X0 of the icon
  64 bCmd_ldiy0      EQU     {VAR}+1                 ;Fetch Y0 of the icon
  65 bCmd_ldix1      EQU     {VAR}+2                 ;Fetch X1 of the icon
  66 bCmd_ldiy1      EQU     {VAR}+3                 ;Fetch Y1 of the icon
  67
  68                 #       4
  69 bCmd_ldx0       EQU     {VAR}+0                 ;Fetch last stored X0
  70 bCmd_ldy0       EQU     {VAR}+1                 ;Fetch last stored Y0
  71 bCmd_ldx1       EQU     {VAR}+2                 ;Fetch last stored X1
  72 bCmd_ldy1       EQU     {VAR}+3                 ;Fetch last stored Y1
  73
  74                 #       4
  75 bCmd_ldhc       EQU     {VAR}+0                 ;Fetch horizontal centre
  76 bCmd_ldvc       EQU     {VAR}+1                 ;Fetch vertical centre
  77
  78                 #       4
  79 bCmd_add        EQU     {VAR}+0                 ;Add next byte
  80 bCmd_sub        EQU     {VAR}+1                 ;Subtract next byte
  81
  82                 #       4
  83 bCmd_stx0       EQU     {VAR}+0                 ;Store as the X0 parameter
  84 bCmd_sty0       EQU     {VAR}+1                 ;Store as the Y0 parameter
  85 bCmd_stx1       EQU     {VAR}+2                 ;Store as the X1 parameter
  86 bCmd_sty1       EQU     {VAR}+3                 ;Store as the Y1 parameter
  87
  88                 #       4
  89 bCmd_dark       EQU     {VAR}+0                 ;Use the current `dark' col
  90 bCmd_light      EQU     {VAR}+1                 ;Use the current `light' col
  91 bCmd_raw        EQU     {VAR}+2                 ;Switch to uninverted colours
  92
  93                 #       4
  94 bCmd_icon       EQU     {VAR}+0                 ;Set colours from icon
  95 bCmd_indCol     EQU     {VAR}+1                 ;Indirected colour
  96 bCmd_litCol     EQU     {VAR}+2                 ;Literal colour
  97
  98                 #       4
  99 bCmd_plot       EQU     {VAR}+0                 ;Plot a rule (arg == branch)
 100
 101                 #       4
 102 bCmd_skpt       EQU     {VAR}+0                 ;Skip past the `title'
 103
 104                 #       4
 105 bCmd_group      EQU     {VAR}+0                 ;Plot a group box
 106
 107                 #       4
 108 bCmd_jmp        EQU     {VAR}+0                 ;Jump to a routine
 109 bCmd_call       EQU     {VAR}+1                 ;Call subroutine
 110
 111 ;----- Macros ---------------------------------------------------------------
 112
 113                 ; --- Return ---
 114
 115                 MACRO
 116 $label          BRET
 117 $label          DCB     bCmd_ret
 118                 MEND
 119
 120                 ; --- Load values ---
 121
 122                 MACRO
 123 $label          BLDIX0
 124 $label          DCB     bCmd_ldix0
 125                 MEND
 126
 127                 MACRO
 128 $label          BLDIY0
 129 $label          DCB     bCmd_ldiy0
 130                 MEND
 131
 132                 MACRO
 133 $label          BLDIX1
 134 $label          DCB     bCmd_ldix1
 135                 MEND
 136
 137                 MACRO
 138 $label          BLDIY1
 139 $label          DCB     bCmd_ldiy1
 140                 MEND
 141
 142                 ; --- Load values ---
 143
 144                 MACRO
 145 $label          BLDX0
 146 $label          DCB     bCmd_ldx0
 147                 MEND
 148
 149                 MACRO
 150 $label          BLDY0
 151 $label          DCB     bCmd_ldy0
 152                 MEND
 153
 154                 MACRO
 155 $label          BLDX1
 156 $label          DCB     bCmd_ldx1
 157                 MEND
 158
 159                 MACRO
 160 $label          BLDY1
 161 $label          DCB     bCmd_ldy1
 162                 MEND
 163
 164                 ; --- Centring ---
 165
 166                 MACRO
 167 $label          LDHC
 168 $label          DCB     bCmd_ldhc
 169                 MEND
 170
 171                 MACRO
 172 $label          BLDVC
 173 $label          DCB     bCmd_ldvc
 174                 MEND
 175
 176                 ; --- Arithmetic ---
 177
 178                 MACRO
 179 $label          BADD    $val
 180 $label          DCB     bCmd_add,$val
 181                 MEND
 182
 183                 MACRO
 184 $label          BSUB    $val
 185 $label          DCB     bCmd_sub,$val
 186                 MEND
 187
 188                 MACRO
 189 $label          BSKIPT
 190 $label          DCB     bCmd_skpt
 191                 MEND
 192
 193                 ; --- Storing values ---
 194
 195                 MACRO
 196 $label          BSTX0
 197 $label          DCB     bCmd_stx0
 198                 MEND
 199
 200                 MACRO
 201 $label          BSTY0
 202 $label          DCB     bCmd_sty0
 203                 MEND
 204
 205                 MACRO
 206 $label          BSTX1
 207 $label          DCB     bCmd_stx1
 208                 MEND
 209
 210                 MACRO
 211 $label          BSTY1
 212 $label          DCB     bCmd_sty1
 213                 MEND
 214
 215                 ; --- Colouring ---
 216
 217                 MACRO
 218 $label          BLIGHT
 219 $label          DCB     bCmd_light
 220                 MEND
 221
 222                 MACRO
 223 $label          BDARK
 224 $label          DCB     bCmd_dark
 225                 MEND
 226
 227                 MACRO
 228 $label          BRAW
 229 $label          DCB     bCmd_raw
 230                 MEND
 231
 232                 MACRO
 233 $label          BICON
 234 $label          DCB     bCmd_icon
 235                 MEND
 236
 237                 MACRO
 238 $label          BINDCOL $colour
 239 $label          DCB     bCmd_indCol,:INDEX:$colour
 240                 MEND
 241
 242                 MACRO
 243 $label          BLITCOL $colour
 244 $label          DCB     bCmd_litCol,$colour
 245                 MEND
 246
 247                 ; --- Plotting ---
 248
 249                 MACRO
 250 $label          BPLOT   $rule
 251 $label          DCB     bCmd_plot
 252                 ALIGN
 253                 B       $rule
 254                 MEND
 255
 256                 MACRO
 257 $label          BGROUP  $flags
 258 $label          DCB     bCmd_group
 259                 ALIGN
 260                 DCD     $flags
 261                 MEND
 262
 263                 ; --- Subroutines ---
 264
 265                 MACRO
 266 $label          BJMP    $addr
 267 $label          DCB     bCmd_jmp
 268                 ALIGN
 269                 DCD     $addr-{PC}-4
 270                 MEND
 271
 272                 MACRO
 273 $label          BCALL   $addr
 274 $label          DCB     bCmd_call
 275                 ALIGN
 276                 DCD     $addr-{PC}-4
 277                 MEND
 278
 279                 ]
 280
 281 ;----- That's all, folks ----------------------------------------------------
 282
 283                 END