graphics/dispdib.c

   1 /*
   2  * DISPDIB.dll
   3  *
   4  * Copyright 1998 Ove Kåven (with some help from Marcus Meissner)
   5  *
   6  */
   7
   8 #include <string.h>
   9 #include "miscemu.h"
  10 #include "dispdib.h"
  11 #include "vga.h"
  12 #include "debugtools.h"
  13 #include "wine/wingdi16.h"
  14
  15 DEFAULT_DEBUG_CHANNEL(ddraw)
  16
  17 static int dispdib_multi = 0;
  18
  19 static WORD DISPDIB_Begin(WORD wFlags)
  20 {
  21     unsigned Xres,Yres,Depth;
  22
  23     switch(wFlags&DISPLAYDIB_MODE) {
  24         case DISPLAYDIB_MODE_DEFAULT:
  25             /* FIXME: is this supposed to autodetect? */
  26         case DISPLAYDIB_MODE_320x200x8:
  27             Xres=320; Yres=200; Depth=8; break;
  28         case DISPLAYDIB_MODE_320x240x8:
  29             Xres=320; Yres=240; Depth=8; break;
  30         default:
  31             return DISPLAYDIB_NOTSUPPORTED;
  32     }
  33     /* more or less dummy calls to Death/Resurrection, for completeness */
  34     /* FIXME: what arguments should they get? */
  35     Death16(0);
  36     if (VGA_SetMode(Xres,Yres,Depth)) {
  37          Resurrection16(0,0,0,0,0,0,0);
  38          return DISPLAYDIB_NOTSUPPORTED;
  39     }
  40     return DISPLAYDIB_NOERROR;
  41 }
  42
  43 static void DISPDIB_End(void)
  44 {
  45     Resurrection16(0,0,0,0,0,0,0); /* FIXME: arguments */
  46     VGA_Exit();
  47 }
  48
  49 static void DISPDIB_Palette(LPBITMAPINFO lpbi)
  50 {
  51     VGA_SetQuadPalette(lpbi->bmiColors,0,256);
  52 }
  53
  54 static void DISPDIB_Show(LPBITMAPINFOHEADER lpbi,LPSTR lpBits,WORD uFlags)
  55 {
  56     int Xofs,Yofs,Width=lpbi->biWidth,Height=lpbi->biHeight,Delta;
  57     unsigned Pitch=(Width+3)&~3,sPitch,sWidth,sHeight;
  58     LPSTR surf = DOSMEM_MapDosToLinear(0xa0000);
  59
  60     if (VGA_GetMode(&sHeight,&sWidth,NULL)) return;
  61     sPitch=320;
  62
  63     Delta=(Height<0)*2-1;
  64     Height*=-Delta; Pitch*=Delta;
  65
  66     if (uFlags&DISPLAYDIB_NOCENTER) {
  67         Xofs=0; Yofs=0;
  68     } else {
  69         Xofs=(sWidth-Width)/2;
  70         Yofs=(sHeight-Height)/2;
  71     }
  72     surf += (Yofs*sPitch)+Xofs;
  73     if (Pitch<0) lpBits-=Pitch*(Height-1);
  74     for (; Height; Height--,lpBits+=Pitch,surf+=sPitch) {
  75         memcpy(surf,lpBits,Width);
  76     }
  77
  78     VGA_Poll(0);
  79 }
  80
  81 /*********************************************************************
  82  *      DisplayDib      (DISPDIB.1)
  83  *
  84  *  Disables GDI and takes over the VGA screen to show DIBs in full screen.
  85  *
  86  * FLAGS
  87  *
  88  *  DISPLAYDIB_NOPALETTE: don't change palette
  89  *  DISPLAYDIB_NOCENTER: don't center bitmap
  90  *  DISPLAYDIB_NOWAIT: don't wait (for keypress) before returning
  91  *  DISPLAYDIB_BEGIN: start of multiple calls (does not restore the screen)
  92  *  DISPLAYDIB_END: end of multiple calls (restores the screen)
  93  *  DISPLAYDIB_MODE_DEFAULT: default display mode
  94  *  DISPLAYDIB_MODE_320x200x8: Standard VGA 320x200 256 colors
  95  *  DISPLAYDIB_MODE_320x240x8: Tweaked VGA 320x240 256 colors
  96  *
  97  * RETURNS
  98  *
  99  *  DISPLAYDIB_NOERROR: success
 100  *  DISPLAYDIB_NOTSUPPORTED: function not supported
 101  *  DISPLAYDIB_INVALIDDIB: null or invalid DIB header
 102  *  DISPLAYDIB_INVALIDFORMAT: invalid DIB format
 103  *  DISPLAYDIB_INVALIDTASK: not called from current task
 104  *
 105  * BUGS
 106  *
 107  *  Waiting for keypresses is not implemented.
 108  */
 109 WORD WINAPI DisplayDib(
 110                 LPBITMAPINFO lpbi, /* DIB header with resolution and palette */
 111                 LPSTR lpBits, /* Bitmap bits to show */
 112                 WORD wFlags
 113         )
 114 {
 115     WORD ret;
 116
 117     if (wFlags&DISPLAYDIB_END) {
 118         if (dispdib_multi) DISPDIB_End();
 119         dispdib_multi = 0;
 120         return DISPLAYDIB_NOERROR;
 121     }
 122     if (!dispdib_multi) {
 123         ret=DISPDIB_Begin(wFlags);
 124         if (ret) return ret;
 125     }
 126     if (wFlags&DISPLAYDIB_BEGIN) dispdib_multi = 1;
 127     if (!(wFlags&DISPLAYDIB_NOPALETTE)) {
 128         DISPDIB_Palette(lpbi);
 129     }
 130     /* FIXME: not sure if it's valid to draw images in DISPLAYDIB_BEGIN, so... */
 131     if (lpBits) {
 132         DISPDIB_Show(&(lpbi->bmiHeader),lpBits,wFlags);
 133     }
 134     if (!(wFlags&DISPLAYDIB_NOWAIT)) {
 135         FIXME("wait not implemented\n");
 136     }
 137     if (!dispdib_multi) DISPDIB_End();
 138     return DISPLAYDIB_NOERROR;
 139 }