138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
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/************************************************************************/
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/* */
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/* CVTVDIF.C */
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/* */
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/* July 12 1995 (c) 1993, 1995 ATI Technologies Incorporated. */
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/************************************************************************/
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/********************** PolyTron RCS Utilities
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$Revision: 1.5 $
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$Date: 23 Jan 1996 11:45:32 $
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$Author: RWolff $
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$Log: S:/source/wnt/ms11/miniport/archive/cvtvdif.c_v $
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*
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* Rev 1.5 23 Jan 1996 11:45:32 RWolff
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* Protected against false values of TARGET_BUILD.
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*
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* Rev 1.4 11 Jan 1996 19:39:06 RWolff
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* Now restricts "canned" mode tables by both maximum index and maximum
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* pixel clock frequency, and VDIF mode tables by maximum pixel clock
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* frequency only, rather than both by maximum refresh rate.
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*
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* Rev 1.3 19 Dec 1995 14:07:14 RWolff
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* Added debug print statements.
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*
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* Rev 1.2 30 Oct 1995 12:09:42 MGrubac
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* Fixed bug in calculating CRTC parameters based on read in data from VDIF files.
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*
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* Rev 1.1 26 Jul 1995 13:06:44 mgrubac
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* Moved mode tables merging to VDIFCallback() routine.
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*
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* Rev 1.0 20 Jul 1995 18:19:12 mgrubac
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* Initial revision.
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End of PolyTron RCS section *****************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <math.h>
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#include "dderror.h"
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#include "miniport.h"
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#include "ntddvdeo.h"
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#include "video.h" /* for VP_STATUS definition */
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#include "vidlog.h"
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#include "stdtyp.h"
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#include "amach.h"
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#include "amach1.h"
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#include "atimp.h"
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#include "atint.h"
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#include "cvtvga.h"
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#include "atioem.h"
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#include "services.h"
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#include "vdptocrt.h"
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#include "vdpdata.h"
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#include "cvtvdif.h"
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/*
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* Allow miniport to be swapped out when not needed.
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*/
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#if defined (ALLOC_PRAGMA)
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#pragma alloc_text(PAGE_COM, SetOtherModeParameters)
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#endif
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void *pCallbackArgs; /* Pointer for passing parameters to VDIFCallback() */
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/**************************************************************************
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*
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* void SetOtherModeParameters( PixelDepth, Pitch, Multiplier, pmode)
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* WORD Multiplier; What needs to be done to the pixel clock
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* WORD PixelDepth; Number of bits per pixel
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* WORD Pitch; Screen pitch to use
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* struct st_mode_table *pmode; Pointer to structure that must contain
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* at least the member ClockFreq
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*
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*
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* DESCRIPTION:
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* Sets parameters PixelDepth, Pitch and adjusts ClockFreq
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*
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* RETURN VALUE:
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* None
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*
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* GLOBALS CHANGED:
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* None
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*
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* CALLED BY:
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* SetFixedModes and VDIFCallback
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*
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* AUTHOR:
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* Miroslav Grubac
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*
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* CHANGE HISTORY:
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*
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* TEST HISTORY:
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*
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***************************************************************************/
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void SetOtherModeParameters( WORD PixelDepth,
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WORD Pitch,
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WORD Multiplier,
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struct st_mode_table *pmode)
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{
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pmode->m_pixel_depth = (UCHAR) PixelDepth;
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pmode->m_screen_pitch = Pitch;
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/*
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* Take care of any pixel clock multiplication that is needed.
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*/
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switch(Multiplier)
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{
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case CLOCK_TRIPLE:
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pmode->ClockFreq *= 3;
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break;
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case CLOCK_DOUBLE:
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pmode->ClockFreq *= 2;
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break;
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case CLOCK_THREE_HALVES:
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pmode->ClockFreq *= 3;
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pmode->ClockFreq >>= 1;
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break;
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case CLOCK_SINGLE:
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default:
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break;
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}
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} /* SetOtherModeParameters() */
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