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

   1 ;
   2 ; sculptrix.s
   3 ;
   4 ; Sculptrix module header and initialisation
   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 ;----- Standard header ------------------------------------------------------
  28
  29                 GET     libs:header
  30                 GET     libs:swis
  31
  32                 GET     libs:stream
  33
  34 ;----- External dependencies ------------------------------------------------
  35
  36                 GET     sh.bbox
  37                 GET     sh.config
  38                 GET     sh.plot
  39                 GET     sh.redraw
  40                 GET     sh.slab
  41                 GET     sh.vString
  42                 GET     sh.wSpace
  43
  44                 GET     sh.messages
  45
  46                 IMPORT  version
  47
  48 ;----- Module header --------------------------------------------------------
  49
  50                 AREA    |!Module$$Code|,CODE,READONLY
  51
  52                 DCD     0
  53                 DCD     sculpt__init
  54                 DCD     sculpt__final
  55                 DCD     sculpt__service
  56                 DCD     sculpt__name
  57                 DCD     version
  58                 DCD     sculpt__cmds
  59                 DCD     &4A2C0
  60                 DCD     sculpt__swis
  61                 DCD     sculpt__swiTbl
  62                 DCD     0
  63
  64 sculpt__name    DCB     "Sculptrix",0
  65
  66 ;----- SWI name table -------------------------------------------------------
  67
  68 sculpt__swiTbl  DCB     "Sculptrix",0
  69                 DCB     "RedrawWindow",0
  70                 DCB     "DoSlab",0
  71                 DCB     "SlabIcon",0
  72                 DCB     "UnslabIcon",0
  73                 DCB     "BoundingBox",0
  74                 DCB     "PlotIcon",0
  75                 DCB     "PlotGroupBox",0
  76                 DCB     "SetSpriteArea",0
  77                 DCB     "UpdateIcon",0
  78                 DCB     "SlabColour",0
  79                 DCB     "SetConfig",0
  80                 DCB     "ReadConfig",0
  81                 DCB     0
  82
  83 ;----- *Command table -------------------------------------------------------
  84
  85 sculpt__cmds    DCB     "Sculptrix_LoadConfig",0
  86                 DCD     config_load
  87                 DCB     1,0,1,0
  88                 DCD     synt_config
  89                 DCD     help_config
  90
  91                 DCD     0
  92
  93 ;----- Main code ------------------------------------------------------------
  94
  95 ; --- sculpt__init ---
  96 ;
  97 ; On entry:     --
  98 ;
  99 ; On exit:      R0-R6 corrupted
 100 ;
 101 ; Use:          Initialises the Sculptrix module.
 102
 103 sculpt__init    ROUT
 104
 105                 STMFD   R13!,{R14}              ;Save some registers
 106
 107                 ; --- Allocate workspace ---
 108
 109                 MOV     R0,#6                   ;Allocate some space please
 110                 LDR     R3,=sculpt_wSize        ;Get the workspace size
 111                 SWI     XOS_Module              ;Try to allocate the space
 112                 LDMVSFD R13!,{PC}               ;Abort if it failed
 113                 STR     R2,[R12,#0]             ;Store the workspace address
 114                 MOV     R12,R2                  ;Put pointer in R12
 115
 116                 ; --- Initialise the workspace ---
 117
 118                 BL      sculpt__vduVars         ;Read the VDU variables
 119                 MOV     R14,#1                  ;Use Wimp area by default
 120                 STR     R14,sculpt_sprArea      ;Store this as the area
 121                 MOV     R14,#0                  ;Clear some initial flags
 122                 STR     R14,sculpt_flags        ;Store these away
 123
 124                 ; --- Initialise colour tables ---
 125
 126                 ADR     R0,sculpt__colDefs      ;Point to the config block
 127                 BL      config_set              ;Set the configuration
 128
 129                 LDMFD   R13!,{PC}^              ;Return when done
 130
 131 sculpt__colDefs DCD     0
 132                 DCB     4,0,4,0
 133                 DCB     2,0,2,0
 134                 DCB     12,14
 135
 136                 LTORG
 137
 138 ; --- sculpt__final ---
 139 ;
 140 ; On entry:     --
 141 ;
 142 ; On exit:      R0-R6 corrupted
 143 ;
 144 ; Use:          Clears up after Sculptrix.  We try to free the workspace,
 145 ;               but return even if this failed, since it isn't worth screwing
 146 ;               up the whole computer for the sake of <1K of memory.
 147
 148 sculpt__final   ROUT
 149
 150                 STMFD   R13!,{R14}              ;Save return address
 151
 152                 ; --- Just workspace to free ---
 153
 154                 MOV     R0,#7                   ;Free RMA block
 155                 LDR     R2,[R12,#0]             ;Load the address
 156                 SWI     XOS_Module              ;Try to do this
 157                 MOV     R14,#0                  ;Zero workspace address
 158                 STR     R14,[R12,#0]            ;Do this anyway
 159
 160                 LDMFD   R13!,{PC}^              ;And return to caller
 161
 162                 LTORG
 163
 164 ; --- sculpt__service ---
 165 ;
 166 ; On entry:     R1 == service number
 167 ;
 168 ; On exit:      --
 169 ;
 170 ; Use:          Handles service calls to the Sculptrix module.
 171
 172 sculpt__service ROUT
 173
 174                 CMP     R1,#&46                 ;Is it a mode change call?
 175                 MOVNES  PC,R14                  ;No -- ignore it then
 176
 177                 LDR     R12,[R12,#0]            ;Load the workspace address
 178                 B       sculpt__vduVars         ;Set up the VDU variables
 179
 180                 LTORG
 181
 182 ; --- sculpt__vduVars ---
 183 ;
 184 ; On entry:     --
 185 ;
 186 ; On exit:      --
 187 ;
 188 ; Use:          Reads the VDU variables into Sculptrix's cache buffer.
 189
 190 sculpt__vduVars ROUT
 191
 192                 STMFD   R13!,{R0-R2,R14}        ;Save some registers
 193
 194                 ; --- Read the pixel sizes ---
 195
 196                 ADR     R0,sculpt__vduList      ;Point to request list
 197                 ADR     R1,sculpt_vduVars       ;Point to output buffer
 198                 SWI     XOS_ReadVduVariables    ;Read the variable values
 199
 200                 LDMIA   R1,{R0,R1}              ;Load the values out
 201
 202                 ; --- Now work out the mitring start ---
 203
 204                 ORR     R2,R0,R1,LSL #2         ;Build a table index
 205                 ADR     R14,sculpt__mitres      ;Point to the table
 206                 LDRB    R2,[R14,R2]             ;Load the value I want
 207
 208                 ; --- Convert to pixels ---
 209
 210                 MOV     R14,#1                  ;We need this...
 211                 MOV     R0,R14,LSL R0           ;Convert log to pixels
 212                 MOV     R1,R14,LSL R1           ;For both of them, please
 213                 ADR     R14,sculpt_vduVars      ;Point to output buffer
 214                 STMIA   R14,{R0-R2}             ;Store the values away
 215                 LDMFD   R13!,{R0-R2,PC}^        ;Return when finished
 216
 217                 ; --- Which VDU variables to get ---
 218
 219 sculpt__vduList DCD     4,5,-1                  ;Just x- and y-EIG factors
 220
 221                 ; --- Table of mitring values ---
 222
 223 sculpt__mitres  DCB     1,2,0,0
 224                 DCB     2,2,0,0
 225                 DCB     2,2,4,0
 226
 227                 LTORG
 228
 229 ; --- sculpt__swis ---
 230 ;
 231 ; On entry:     R0-R9 == arguments
 232 ;               R11 == SWI number
 233 ;
 234 ; On exit:      R0-R9 == return values
 235 ;
 236 ; Use:          Processes SWI calls to Sculptrix.
 237
 238 sculpt__swis    ROUT
 239
 240                 LDR     R12,[R12,#0]            ;Load my workspace pointer
 241                 CMP     R11,#(%10-%00)/4        ;Is the SWI in range?
 242                 ADDCC   PC,PC,R11,LSL #2        ;Yes -- dispatch to handler
 243                 B       %10sculpt__swis         ;Otherwise report error
 244
 245 00              B       redraw_window           ;Sculptrix_RedrawWindow
 246                 B       slab_doSlab             ;Sculptrix_DoSlab
 247                 B       slab_slab               ;Sculptrix_SlabIcon
 248                 B       slab_unslab             ;Sculptrix_UnslabIcon
 249                 B       bbox_calc               ;Sculptrix_BoundingBox
 250                 B       redraw_icon             ;Sculptrix_PlotIcon
 251                 B       redraw_group            ;Sculptrix_PlotGroupBox
 252                 B       sculpt__setArea         ;Sculptrix_SetSpriteArea
 253                 B       redraw_update           ;Sculptrix_UpdateIcon
 254                 B       slab_colour             ;Sculptrix_SlabColour
 255                 B       config_set              ;Sculptrix_SetConfig
 256                 B       config_read             ;Sculptrix_ReadConfig
 257
 258 10              ADRL    R0,msg_errBadSwi        ;Point to the error message
 259                 ORRS    PC,R14,#V_flag          ;And return the error
 260
 261                 LTORG
 262
 263 ; --- sculpt__setArea ---
 264 ;
 265 ; On entry:     R0 == sprite area to select
 266 ;
 267 ; On exit:      --
 268 ;
 269 ; Use:          Sets the sprite area to use.
 270
 271 sculpt__setArea ROUT
 272
 273                 STR     R0,sculpt_sprArea       ;Store the area address
 274                 MOVS    PC,R14                  ;And return to caller
 275
 276                 LTORG
 277
 278 ;----- That's all, folks ----------------------------------------------------
 279
 280                 END