src/add-ons/accelerants/et6x00/SetDisplayMode.c

   1 /*****************************************************************************\
   2  * Tseng Labs ET6000, ET6100 and ET6300 graphics driver for BeOS 5.
   3  * Copyright (c) 2003-2004, Evgeniy Vladimirovich Bobkov.
   4 \*****************************************************************************/
   5
   6 #include "GlobalData.h"
   7 #include "generic.h"
   8 #include <sys/ioctl.h>
   9
  10
  11 /*****************************************************************************/
  12 /*
  13  * The code to actually configure the display.
  14  */
  15 static status_t doSetDisplayMode(display_mode *dm) {
  16 ET6000DisplayMode mode;
  17
  18     mode.magic = ET6000_PRIVATE_DATA_MAGIC;
  19     mode.mode = *dm;
  20     mode.pciConfigSpace = si->pciConfigSpace;
  21
  22     return ioctl(fd, ET6000_SET_DISPLAY_MODE, &mode, sizeof(mode));
  23 }
  24 /*****************************************************************************/
  25 /*
  26  * The exported mode setting routine. First validate the mode,
  27  * then call our private routine to hammer the registers.
  28  */
  29 status_t SET_DISPLAY_MODE(display_mode *mode_to_set) {
  30 display_mode bounds, target;
  31 status_t result;
  32 uint8 bpp;
  33
  34     /* ask for the specific mode */
  35     target = bounds = *mode_to_set;
  36     if (PROPOSE_DISPLAY_MODE(&target, &bounds, &bounds) != B_OK) /* ==B_ERROR???/// */
  37         return B_ERROR;
  38
  39     result = doSetDisplayMode(&target);
  40
  41     if (result == B_OK) {
  42         switch (target.space) {
  43             case B_RGB24_LITTLE:
  44             case B_RGB24_BIG:
  45                 bpp = 3;
  46                 break;
  47             case B_RGB16_LITTLE:
  48             case B_RGB16_BIG:
  49             case B_RGB15_LITTLE:
  50             case B_RGB15_BIG:
  51                 bpp = 2;
  52                 break;
  53                         default:
  54                                 return B_BAD_VALUE;
  55         }
  56         si->fbc.bytes_per_row = target.virtual_width * bpp;
  57         si->dm = target;
  58         si->bytesPerPixel = bpp;
  59         et6000aclInit(bpp);
  60     }
  61
  62     return result;
  63 }
  64 /*****************************************************************************/