Sweden-Number/graphics/dispdib.c

131 lines
3.4 KiB
C

/*
* DISPDIB.dll
*
* Copyright 1998 Ove Kåven (with some help from Marcus Meissner)
*
*/
#include <string.h>
#include "windows.h"
#include "miscemu.h"
#include "dispdib.h"
#include "vga.h"
#include "debug.h"
static int dispdib_multi = 0;
static WORD DISPDIB_Begin(WORD wFlags)
{
unsigned Xres,Yres,Depth;
switch(wFlags&DISPLAYDIB_MODE) {
case DISPLAYDIB_MODE_DEFAULT:
/* FIXME: is this supposed to autodetect? */
case DISPLAYDIB_MODE_320x200x8:
Xres=320; Yres=200; Depth=8; break;
case DISPLAYDIB_MODE_320x240x8:
Xres=320; Yres=240; Depth=8; break;
default:
return DISPLAYDIB_NOTSUPPORTED;
}
if (VGA_SetMode(Xres,Yres,Depth)) return DISPLAYDIB_NOTSUPPORTED;
return DISPLAYDIB_NOERROR;
}
static void DISPDIB_End(void)
{
VGA_Exit();
}
static void DISPDIB_Palette(LPBITMAPINFO lpbi)
{
VGA_SetQuadPalette(lpbi->bmiColors,0,256);
}
static void DISPDIB_Show(LPBITMAPINFOHEADER lpbi,LPSTR lpBits,WORD uFlags)
{
int Xofs,Yofs,Width=lpbi->biWidth,Height=lpbi->biHeight,Delta;
unsigned Pitch=(Width+3)&~3,sPitch,sWidth,sHeight;
LPSTR surf = DOSMEM_MapDosToLinear(0xa0000);
if (VGA_GetMode(&sHeight,&sWidth,NULL)) return;
sPitch=320;
Delta=(Height<0)*2-1;
Height*=-Delta; Pitch*=Delta;
if (uFlags&DISPLAYDIB_NOCENTER) {
Xofs=0; Yofs=0;
} else {
Xofs=(sWidth-Width)/2;
Yofs=(sHeight-Height)/2;
}
surf += (Yofs*sPitch)+Xofs;
if (Pitch<0) lpBits-=Pitch*(Height-1);
for (; Height; Height--,lpBits+=Pitch,surf+=sPitch) {
memcpy(surf,lpBits,Width);
}
VGA_Poll();
}
/*********************************************************************
* DisplayDib (DISPDIB.1)
*
* Disables GDI and takes over the VGA screen to show DIBs in full screen.
*
* FLAGS
*
* DISPLAYDIB_NOPALETTE: don't change palette
* DISPLAYDIB_NOCENTER: don't center bitmap
* DISPLAYDIB_NOWAIT: don't wait (for keypress) before returning
* DISPLAYDIB_BEGIN: start of multiple calls (does not restore the screen)
* DISPLAYDIB_END: end of multiple calls (restores the screen)
* DISPLAYDIB_MODE_DEFAULT: default display mode
* DISPLAYDIB_MODE_320x200x8: Standard VGA 320x200 256 colors
* DISPLAYDIB_MODE_320x240x8: Tweaked VGA 320x240 256 colors
*
* RETURNS
*
* DISPLAYDIB_NOERROR: success
* DISPLAYDIB_NOTSUPPORTED: function not supported
* DISPLAYDIB_INVALIDDIB: null or invalid DIB header
* DISPLAYDIB_INVALIDFORMAT: invalid DIB format
* DISPLAYDIB_INVALIDTASK: not called from current task
*
* BUGS
*
* Waiting for keypresses is not implemented.
*/
WORD WINAPI DisplayDib(
LPBITMAPINFO lpbi, /* DIB header with resolution and palette */
LPSTR lpBits, /* Bitmap bits to show */
WORD wFlags
)
{
WORD ret;
if (wFlags&DISPLAYDIB_END) {
if (dispdib_multi) DISPDIB_End();
dispdib_multi = 0;
return DISPLAYDIB_NOERROR;
}
if (!dispdib_multi) {
ret=DISPDIB_Begin(wFlags);
if (ret) return ret;
}
if (wFlags&DISPLAYDIB_BEGIN) dispdib_multi = 1;
if (!(wFlags&DISPLAYDIB_NOPALETTE)) {
DISPDIB_Palette(lpbi);
}
/* FIXME: not sure if it's valid to draw images in DISPLAYDIB_BEGIN, so... */
if (lpBits) {
DISPDIB_Show(&(lpbi->bmiHeader),lpBits,wFlags);
}
if (!(wFlags&DISPLAYDIB_NOWAIT)) {
FIXME(ddraw,"wait not implemented\n");
}
if (!dispdib_multi) DISPDIB_End();
return DISPLAYDIB_NOERROR;
}