mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Libraries/Sapphire/sh/sprite

   1 ;
   2 ; sprite.sh
   3 ;
   4 ; Nice operations on sprites
   5 ;
   6 ; © 1994-1998 Straylight
   7 ;
   8
   9 ;----- Licensing note -------------------------------------------------------
  10 ;
  11 ; This file is part of Straylight's Sapphire library.
  12 ;
  13 ; Sapphire 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 ; Sapphire 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 Sapphire.  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 ;  sprite_op
  32 ;  sprite_getTable
  33 ;  sprite_plot
  34
  35                 [       :LNOT::DEF:sprite__dfn
  36                 GBLL    sprite__dfn
  37
  38 ; --- sprite_op ---
  39 ;
  40 ; On entry:     R0,R2-R7 ==  SpriteOp parameters (R1 set up here)
  41 ;
  42 ; On exit:      Registers and flags altered as for the SpriteOp
  43 ;
  44 ; Use:          Performs an OS_SpriteOp with the given arguments, using
  45 ;               the appication's Sprites resource as the sprite area.
  46
  47                 IMPORT  sprite_op
  48
  49 ; --- sprite_getTable ---
  50 ;
  51 ; On entry:     R0 == pointer to a sprite
  52 ;               R1 == pointer to buffer for translate table
  53 ;
  54 ; On exit:      --
  55 ;
  56 ; Use:          Creates a colour translate table for the given sprite in
  57 ;               the specified buffer.
  58 ;
  59 ;               If you have a sprite name but no pointer, use OS_SpriteOp
  60 ;               24 to find the pointer -- this will make further sprite ops
  61 ;               on the sprite much quicker.
  62
  63                 IMPORT  sprite_getTable
  64
  65 ; --- sprite_plot ---
  66 ;
  67 ; On entry:     R0 == pointer to a sprite
  68 ;               R1 == x coordinate to plot at
  69 ;               R2 == y coordinate to plot at
  70 ;               R3 == pointer to scale block, or 0 for 1:1
  71 ;
  72 ; On exit:      CS if the sprite was plotted OK, else CC
  73 ;
  74 ; Use:          Plots a sprite on the screen.  The scaling refers to the
  75 ;               sprite proper: /this/ routine takes care of odd pixel
  76 ;               sizes and things, so sprites don't appear squashed or
  77 ;               stretched unless you really want them to.
  78 ;
  79 ;               We return C clear on exit if we couldn't plot the sprite;
  80 ;               typically this would be if the sprite's mode is undefined.
  81
  82                 IMPORT  sprite_plot
  83
  84                 ]
  85
  86 ;----- That's all, folks ----------------------------------------------------
  87
  88                 END