int ui_init(int *fd_keyboard, int *fd_mouse)
{
int dac_shift, i, mouse_type, force_red;
if (vga_init() == 0)
{
old_mode = vga_getcurrentmode();
vga_setmode(G640x480x256);
/*vga_setlinearaddressing();*/
if (vga_ext_set(VGA_EXT_AVAILABLE, VGA_AVAIL_FLAGS) & VGA_CLUT8)
{
vga_ext_set(VGA_EXT_SET, VGA_CLUT8);
dac_shift = 0;
}
else
dac_shift = 2;
force_red = 0xFF;
for (i = 0; i < 255; i++)
vga_setpalette(i,
i >> dac_shift,
(i & force_red) >> dac_shift,
(i & force_red) >> dac_shift);
vga_setpalette(UI_LO_COLOR, 127 >> dac_shift, 0, 0); /* Save dim red for UI */
vga_setpalette(UI_HI_COLOR, 255 >> dac_shift, 0, 0); /* Save bright red for UI */
vga = vga_getmodeinfo(vga_getcurrentmode());
}
void I_ShutdownGraphics(void)
{
keyboard_close();
if (usemouse)
mouse_close();
if (vga_getcurrentmode() != TEXT)
vga_setmode(TEXT);
}
int main(int argc, char *argv[])
{
int i;
int oldmode;
int mode = G320x200x256;
int width, height, colors;
//获得当前的模式
oldmode = vga_getcurrentmode();
//初始化
vga_init();
//判断是否支持该模式
if(vga_hasmode(mode))
vga_setmode(mode);
else {
printf("No such mode\n");
exit(1);
}
//取得信息
width = vga_getxdim();
height = vga_getydim();
colors = vga_getcolors();
//绘图
for(i=0; i<colors; i++){
vga_setcolor(i);
vga_drawline(0, i, width-1, i);
}
vga_setcolor(3);
for(i=0; i<50; i++) vga_drawpixel(i*4, 20);
vga_setcolor(4);
vga_drawline(100, 100, 300, 200);
vga_setcolor(5);
vga_drawline(0, 0, width-1, 0);
vga_drawline(0, height-1, width-1, height-1);
vga_drawline(0, 0, 0, height-1);
vga_drawline(width-1, 0, width-1, height-1);
//等待按键
while(!vga_getkey());
//恢复原来的模式
vga_setmode(oldmode);
return 0;
}
static void SVGA_UpdateVideoInfo(_THIS)
{
vga_modeinfo *modeinfo;
this->info.wm_available = 0;
this->info.hw_available = 1;
modeinfo = vga_getmodeinfo(vga_getcurrentmode());
this->info.video_mem = modeinfo->memory;
/* FIXME: Add hardware accelerated blit information */
#ifdef SVGALIB_DEBUG
printf("Hardware accelerated blit: %savailable\n", modeinfo->haveblit ? "" : "not ");
#endif
}
void get_graphics_line(char *value)
{ char *video_access;
int bpp;
if (lbuf_addr == NULL)
video_access = "";
else
if (lbuf_len < screen_size)
video_access = " banked";
else
video_access = " linear";
bpp = (ScrDepth < 8) ? ScrDepth : BytesPerPixel*8;
snprintf (value, 81, "Mode %d: %dx%d %dbpp%s, kbd: %s, bkgr: %s",
vga_getcurrentmode(), ScrWidth, ScrHeight, bpp,
video_access, kbd_raw ? "raw" : "cooked",
run_background ? "yes" : "no");
}
void graph_end(void)
{
int i;
PIXMAP_INFO *xpm;
if(vga_getcurrentmode() != TEXT)
vga_setmode(TEXT);
if (cm_pixels) free(cm_pixels);
for (i=0; i<PaneCount; i++)
{ xpm = all_panes[i];
if (xpm != NULL) free_pixmap(xpm);
}
}
int graph_init_video(void)
{
int rc = 0;
int screen_colours;
vga_modeinfo *vminfo;
if (tcgetpgrp(STDIN_FILENO) != getpid())
{ fprintf(stderr, "Sorry, this application cannot start in background\n");
return 0;
}
pltf = PLTF_SVGA;
/*-----------------------------------------------------------*/
/* Checking libvga version, 1.4.0 and prior will return (-1) */
/* Currently you need IOPERM for 1.9.x to run as a non-priv */
/* user, however set IOPERM upsets upsets previous versions */
/*-----------------------------------------------------------*/
if (vga_setmode(-1) >= 0x1900) setenv("IOPERM", "1", 0);
rc = vga_init();
if (rc != 0)
{ fprintf(stderr, "Can't initialise SVGA library. \n"
"Possible solution: log as root, and enter:\n"
"\tchown 0 ifrac\n"
"\tchmod 4755 ifrac\n");
return 0;
}
#ifdef SVGALIB_BACKGROUND_SUPPORT
set_background_routines();
#else
run_background = 0;
#endif
if (!set_video_mode())
{ fprintf(stderr, "Sorry, unable to set video mode. \n");
return 0;
}
vminfo = vga_getmodeinfo(vga_getcurrentmode());
WndWidth = ScrWidth = vminfo->width;
WndHeight = ScrHeight = vminfo->height;
screen_colours = vminfo->colors;
if (screen_colours < 16)
{ fprintf (stderr,
"This application requires at least 16-colour mode\n");
return 0;
}
ScrDepth = 0;
while((screen_colours>>=1) != 0) ScrDepth++;
if (ScrDepth <= 8)
{ BytesPerPixel = 1;
stored_colours = 1;
}
else
{ BytesPerPixel = vminfo->bytesperpixel;
stored_colours = 0;
}
scan_line_width = vminfo->linewidth;
screen_size = scan_line_width * ScrHeight;
if (ScrDepth < 8)
DirVideo = 0;
else {
vga_setpage(screen_page=0);
if (DirVideo == 2 && (vminfo->flags & CAPABLE_LINEAR))
lbuf_len = vga_setlinearaddressing();
if (DirVideo > 0)
lbuf_addr = vga_getgraphmem();
}
return 1;
}
