src/add-ons/accelerants/neomagic/Cursor.c

   1 /*
   2         Copyright 1999, Be Incorporated.   All Rights Reserved.
   3         This file may be used under the terms of the Be Sample Code License.
   4
   5         Other authors:
   6         Rudolf Cornelissen 4/2003-11/2004
   7 */
   8
   9 #define MODULE_BIT 0x20000000
  10
  11 #include "acc_std.h"
  12
  13 status_t SET_CURSOR_SHAPE(uint16 width, uint16 height, uint16 hot_x, uint16 hot_y, uint8 *andMask, uint8 *xorMask)
  14 {
  15         LOG(4,("SET_CURSOR_SHAPE: width %d, height %d, hot_x %d, hot_y %d\n",
  16                 width, height, hot_x, hot_y));
  17
  18         if ((width != 16) || (height != 16))
  19         {
  20                 return B_ERROR;
  21         }
  22         else if ((hot_x >= width) || (hot_y >= height))
  23         {
  24                 return B_ERROR;
  25         }
  26         else
  27         {
  28                 nm_crtc_cursor_define(andMask,xorMask);
  29
  30                 /* Update cursor variables appropriately. */
  31                 si->cursor.width = width;
  32                 si->cursor.height = height;
  33                 si->cursor.hot_x = hot_x;
  34                 si->cursor.hot_y = hot_y;
  35         }
  36
  37         return B_OK;
  38 }
  39
  40 /* Move the cursor to the specified position on the desktop, taking account of virtual/dual issues */
  41 void MOVE_CURSOR(uint16 x, uint16 y)
  42 {
  43         uint16 hds = si->dm.h_display_start;    /* the current horizontal starting pixel */
  44         uint16 vds = si->dm.v_display_start;    /* the current vertical starting line */
  45         uint16 h_adjust;
  46         uint16 h_display = si->dm.timing.h_display; /* local copy needed for flatpanel */
  47         uint16 v_display = si->dm.timing.v_display; /* local copy needed for flatpanel */
  48
  49         /* clamp cursor to display */
  50         if (x >= si->dm.virtual_width) x = si->dm.virtual_width - 1;
  51         if (y >= si->dm.virtual_height) y = si->dm.virtual_height - 1;
  52
  53         /* store, for our info */
  54         si->cursor.x = x;
  55         si->cursor.y = y;
  56
  57         /* setting up minimum amount to scroll not needed:
  58          * Neomagic cards can always do pixelprecise panning */
  59         h_adjust = 0x00;
  60
  61         /* if internal panel is active correct visible screensize! */
  62         if (nm_general_output_read() & 0x02)
  63         {
  64                 if (h_display > si->ps.panel_width) h_display = si->ps.panel_width;
  65                 if (v_display > si->ps.panel_height) v_display = si->ps.panel_height;
  66         }
  67
  68         /* adjust h/v_display_start to move cursor onto screen */
  69         if (x >= (h_display + hds))
  70         {
  71                 hds = ((x - h_display) + 1 + h_adjust) & ~h_adjust;
  72                 /* make sure we stay within the display! */
  73                 if ((hds + h_display) > si->dm.virtual_width)
  74                         hds -= (h_adjust + 1);
  75         }
  76         else if (x < hds)
  77                 hds = x & ~h_adjust;
  78
  79         if (y >= (v_display + vds))
  80                 vds = y - v_display + 1;
  81         else if (y < vds)
  82                 vds = y;
  83
  84         /* reposition the desktop _and_ the overlay on the display if required */
  85         if ((hds!=si->dm.h_display_start) || (vds!=si->dm.v_display_start))
  86         {
  87                 MOVE_DISPLAY(hds,vds);
  88                 nm_bes_move_overlay();
  89         }
  90
  91         /* put cursor in correct physical position */
  92         if (x > (hds + si->cursor.hot_x)) x -= hds + si->cursor.hot_x;
  93         else x = 0;
  94         if (y > (vds + si->cursor.hot_y)) y -= vds + si->cursor.hot_y;
  95         else y = 0;
  96
  97         /* position the cursor on the display */
  98         nm_crtc_cursor_position(x,y);
  99 }
 100
 101 void SHOW_CURSOR(bool is_visible)
 102 {
 103         /* record for our info */
 104         si->cursor.is_visible = is_visible;
 105
 106         if (is_visible)
 107                 nm_crtc_cursor_show();
 108         else
 109                 nm_crtc_cursor_hide();
 110 }