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 "windef.h"
  10 #include "wingdi.h"
  11 #include "wine/wingdi16.h"
  12 #include "miscemu.h"
  13 #include "dispdib.h"
  14 #include "vga.h"
  15 #include "debugtools.h"
  16
  17 DEFAULT_DEBUG_CHANNEL(ddraw);
  18
  19 static int dispdib_multi = 0;
  20
  21 static WORD DISPDIB_Begin(WORD wFlags)
  22 {
  23     unsigned Xres,Yres,Depth;
  24
  25     switch(wFlags&DISPLAYDIB_MODE) {
  26         case DISPLAYDIB_MODE_DEFAULT:
  27             /* FIXME: is this supposed to autodetect? */
  28         case DISPLAYDIB_MODE_320x200x8:
  29             Xres=320; Yres=200; Depth=8; break;
  30         case DISPLAYDIB_MODE_320x240x8:
  31             Xres=320; Yres=240; Depth=8; break;
  32         default:
  33             return DISPLAYDIB_NOTSUPPORTED;
  34     }
  35     /* more or less dummy calls to Death/Resurrection, for completeness */
  36     /* FIXME: what arguments should they get? */
  37     Death16(0);
  38     if (VGA_SetMode(Xres,Yres,Depth)) {
  39          Resurrection16(0,0,0,0,0,0,0);
  40          return DISPLAYDIB_NOTSUPPORTED;
  41     }
  42     return DISPLAYDIB_NOERROR;
  43 }
  44
  45 static void DISPDIB_End(void)
  46 {
  47     Resurrection16(0,0,0,0,0,0,0); /* FIXME: arguments */
  48     VGA_Exit();
  49 }
  50
  51 static void DISPDIB_Palette(LPBITMAPINFO lpbi)
  52 {
  53     VGA_SetQuadPalette(lpbi->bmiColors,0,256);
  54 }
  55
  56 static void DISPDIB_Show(LPBITMAPINFOHEADER lpbi,LPSTR lpBits,WORD uFlags)
  57 {
  58     int Xofs,Yofs,Width=lpbi->biWidth,Height=lpbi->biHeight,Delta;
  59     unsigned Pitch=(Width+3)&~3,sPitch,sWidth,sHeight;
  60     LPSTR surf = DOSMEM_MapDosToLinear(0xa0000);
  61
  62     if (VGA_GetMode(&sHeight,&sWidth,NULL)) return;
  63     sPitch=320;
  64
  65     Delta=(Height<0)*2-1;
  66     Height*=-Delta; Pitch*=Delta;
  67
  68     if (uFlags&DISPLAYDIB_NOCENTER) {
  69         Xofs=0; Yofs=0;
  70     } else {
  71         Xofs=(sWidth-Width)/2;
  72         Yofs=(sHeight-Height)/2;
  73     }
  74     surf += (Yofs*sPitch)+Xofs;
  75     if (Pitch<0) lpBits-=Pitch*(Height-1);
  76     for (; Height; Height--,lpBits+=Pitch,surf+=sPitch) {
  77         memcpy(surf,lpBits,Width);
  78     }
  79
  80     VGA_Poll(0);
  81 }
  82
  83 /*********************************************************************
  84  *      DisplayDib      (DISPDIB.1)
  85  *
  86  *  Disables GDI and takes over the VGA screen to show DIBs in full screen.
  87  *
  88  * FLAGS
  89  *
  90  *  DISPLAYDIB_NOPALETTE: don't change palette
  91  *  DISPLAYDIB_NOCENTER: don't center bitmap
  92  *  DISPLAYDIB_NOWAIT: don't wait (for keypress) before returning
  93  *  DISPLAYDIB_BEGIN: start of multiple calls (does not restore the screen)
  94  *  DISPLAYDIB_END: end of multiple calls (restores the screen)
  95  *  DISPLAYDIB_MODE_DEFAULT: default display mode
  96  *  DISPLAYDIB_MODE_320x200x8: Standard VGA 320x200 256 colors
  97  *  DISPLAYDIB_MODE_320x240x8: Tweaked VGA 320x240 256 colors
  98  *
  99  * RETURNS
 100  *
 101  *  DISPLAYDIB_NOERROR: success
 102  *  DISPLAYDIB_NOTSUPPORTED: function not supported
 103  *  DISPLAYDIB_INVALIDDIB: null or invalid DIB header
 104  *  DISPLAYDIB_INVALIDFORMAT: invalid DIB format
 105  *  DISPLAYDIB_INVALIDTASK: not called from current task
 106  *
 107  * BUGS
 108  *
 109  *  Waiting for keypresses is not implemented.
 110  */
 111 WORD WINAPI DisplayDib(
 112                 LPBITMAPINFO lpbi, /* DIB header with resolution and palette */
 113                 LPSTR lpBits, /* Bitmap bits to show */
 114                 WORD wFlags
 115         )
 116 {
 117     WORD ret;
 118
 119     if (wFlags&DISPLAYDIB_END) {
 120         if (dispdib_multi) DISPDIB_End();
 121         dispdib_multi = 0;
 122         return DISPLAYDIB_NOERROR;
 123     }
 124     if (!dispdib_multi) {
 125         ret=DISPDIB_Begin(wFlags);
 126         if (ret) return ret;
 127     }
 128     if (wFlags&DISPLAYDIB_BEGIN) dispdib_multi = 1;
 129     if (!(wFlags&DISPLAYDIB_NOPALETTE)) {
 130         DISPDIB_Palette(lpbi);
 131     }
 132     /* FIXME: not sure if it's valid to draw images in DISPLAYDIB_BEGIN, so... */
 133     if (lpBits) {
 134         DISPDIB_Show(&(lpbi->bmiHeader),lpBits,wFlags);
 135     }
 136     if (!(wFlags&DISPLAYDIB_NOWAIT)) {
 137         FIXME("wait not implemented\n");
 138     }
 139     if (!dispdib_multi) DISPDIB_End();
 140     return DISPLAYDIB_NOERROR;
 141 }