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Working init_color() and color_content() for DOS. These only work for

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VGA. init_color() works in full-screen mode under Win 9x, XP and OS/2;
in windowed mode, it works in 9x, but only for subsequent drawing, so a
refresh is required. In XP and OS/2, you can change the palette, and the
changed values are preserved, but the colors don't actually change. It
also works in DOSBox. Also, got rid of the NOW_WORKS stuff -- just have
to zero out the dpmi registers, and it now works. More to do here.
This commit is contained in:
William McBrine
2006-09-29 13:47:21 +00:00
parent e2e19176f9
commit 95ed8cfd37
1 changed files with 71 additions and 8 deletions
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79
dos/pdcscrn.c
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@@ -21,10 +21,11 @@
#include <string.h>
#ifdef __DJGPP__
# include <dpmi.h>
# include <sys/movedata.h>
#endif
RCSID("$Id: pdcscrn.c,v 1.55 2006/09/27 07:21:27 wmcbrine Exp $");
RCSID("$Id: pdcscrn.c,v 1.56 2006/09/29 13:47:21 wmcbrine Exp $");
int pdc_adapter; /* screen type */
int pdc_scrnmode; /* default screen mode */
@@ -293,8 +294,7 @@ static int query_adapter_type(void)
/* thanks to paganini@ax.apc.org for the GO32 fix */
#if defined(__DJGPP__) && defined(NOW_WORKS)
# include <dpmi.h>
#ifdef __DJGPP__
_go32_dpmi_registers dpmi_regs;
#endif
@@ -443,7 +443,8 @@ static int query_adapter_type(void)
/* Check for DESQview shadow buffer
thanks to paganini@ax.apc.org for the GO32 fix */
#if defined(__DJGPP__) && defined(NOW_WORKS)
#ifdef __DJGPP__
memset(&dpmi_regs, 0, sizeof(dpmi_regs));
dpmi_regs.h.ah = 0xfe;
dpmi_regs.h.al = 0;
dpmi_regs.x.di = pdc_video_ofs;
@@ -701,7 +702,6 @@ void PDC_reset_shell_mode(void)
PDC_LOG(("PDC_reset_shell_mode() - called.\n"));
}
void PDC_restore_screen_mode(int i)
{
if (i >= 0 && i <= 2)
@@ -723,17 +723,80 @@ void PDC_save_screen_mode(int i)
}
}
#define DIVROUND(num, divisor) ((num) + ((divisor) >> 1)) / (divisor);
bool PDC_can_change_color(void)
{
return FALSE;
return (pdc_adapter == _VGACOLOR);
}
int PDC_color_content(short color, short *red, short *green, short *blue)
{
return ERR;
/* With int86(), DJGPP fails to report the red register; hence
the _dpmi_ stuff */
if (pdc_adapter == _VGACOLOR)
{
#ifdef __DJGPP__
_go32_dpmi_registers regs;
memset(&regs, 0, sizeof(regs));
#else
union REGS regs;
#endif
regs.h.ah = 0x10;
regs.h.al = 0x07;
regs.h.bl = color;
#ifdef __DJGPP__
_go32_dpmi_simulate_int(0x10, &regs);
#else
int86(0x10, &regs, &regs);
#endif
regs.h.ah = 0x10;
regs.h.al = 0x15;
regs.h.bl = regs.h.bh;
#ifdef __DJGPP__
_go32_dpmi_simulate_int(0x10, &regs);
#else
int86(0x10, &regs, &regs);
#endif
*red = DIVROUND((unsigned)(regs.h.dh) * 1000, 63);
*green = DIVROUND((unsigned)(regs.h.ch) * 1000, 63);
*blue = DIVROUND((unsigned)(regs.h.cl) * 1000, 63);
return OK;
}
else
return ERR;
}
int PDC_init_color(short color, short red, short green, short blue)
{
return ERR;
if (pdc_adapter == _VGACOLOR)
{
union REGS regs;
regs.h.ah = 0x10;
regs.h.al = 0x07;
regs.h.bl = color;
int86(0x10, &regs, &regs);
regs.h.ah = 0x10;
regs.h.al = 0x10;
regs.h.bl = regs.h.bh;
regs.h.bh = 0;
regs.h.dh = DIVROUND((unsigned)red * 63, 1000);
regs.h.ch = DIVROUND((unsigned)green * 63, 1000);
regs.h.cl = DIVROUND((unsigned)blue * 63, 1000);
int86(0x10, &regs, &regs);
return OK;
}
else
return ERR;
}