int main(int argc, char *argv[])
{
vga_init();
if(argc>=2) {
timescale=atoi(argv[1]);
if(timescale<1)timescale=1;
}
VGAMODE = vga_getdefaultmode();
if (VGAMODE == -1)
VGAMODE = G320x200x256; /* Default mode. */
if (!vga_hasmode(VGAMODE)) {
printf("Mode not available.\n");
exit(-1);
}
VIRTUAL = 0; /* No virtual screen. */
if (vga_getmodeinfo(VGAMODE)->colors == 16 ||
(vga_getmodeinfo(VGAMODE)->flags & IS_MODEX))
/* These modes are supported indirectly by vgagl. */
VIRTUAL = 1;
if (VIRTUAL) {
/* Create virtual screen. */
gl_setcontextvgavirtual(VGAMODE);
backscreen = gl_allocatecontext();
gl_getcontext(backscreen);
}
vga_setmode(VGAMODE);
gl_setcontextvga(VGAMODE); /* Physical screen context. */
physicalscreen = gl_allocatecontext();
gl_getcontext(physicalscreen);
if (COLORS == 256)
gl_setrgbpalette();
if(argc==3)sleep(2);
test();
/* Now do the same with clipping enabled. */
gl_clearscreen(0);
gl_setclippingwindow(WIDTH / 4, HEIGHT / 4, WIDTH - WIDTH / 4 - 1,
HEIGHT - HEIGHT / 4 - 1);
test();
gl_disableclipping();
if (COLORS == 256)
/* Show the logo if using 256 color mode. */
logotest();
getchar();
if (VIRTUAL)
gl_freecontext(backscreen);
vga_setmode(TEXT);
exit(0);
}
/*
* Term hook
* Initialize a new term
*/
static void term_init_svgalib(term *t)
{
int vgamode;
/* Only one term */
(void) t;
vga_init();
/* The palette is 256x3 bytes big (RGB). */
C_MAKE(pal, 768, byte);
#ifdef USE_GRAPHICS
/* Hardwire this mode in for now */
vgamode = G1024x768x256;
/* Set up the bitmap buffer context */
gl_setcontextvgavirtual(vgamode);
buffer = gl_allocatecontext();
gl_getcontext(buffer);
/* Load bitmap into virtual screen */
term_load_bitmap();
#endif /* USE_GRAPHICS */
/* Hardwire this mode in for now */
vgamode = G640x480x256;
/* Set up the physical screen context */
if (vga_setmode(vgamode) < 0)
{
quit("Graphics mode not available!");
}
gl_setcontextvga(vgamode);
screen = gl_allocatecontext();
gl_getcontext(screen);
/* Is this needed? */
gl_enablepageflipping(screen);
/* Set up palette colors */
setpal();
/* Load the character font data */
initfont();
/* Color 0 isn't transparent */
gl_setwritemode(WRITEMODE_OVERWRITE);
}
bool screen_init (void)
{
#ifdef LINUXFB
use_fb = 1;
if (fb_init ())
{
use_fb = 0;
return false;
}
#endif
#ifdef VGALIB
use_fb = 0;
vga_init ();
vga_setmode(DEFAULT_VGA_MODE);
gl_setcontextvga(DEFAULT_VGA_MODE);
physical_screen = gl_allocatecontext();
gl_getcontext(physical_screen);
gl_setcontextvgavirtual(DEFAULT_VGA_MODE);
virtual_screen = gl_allocatecontext();
gl_getcontext(virtual_screen);
gl_setcontext(virtual_screen);
//vga_ext_set(VGA_EXT_SET, VGA_CLUT8);
// color table:
// http://en.wikipedia.org/wiki/ANSI_escape_code#Colors
gl_setpalettecolor(BLUE, 0, 0, 63); // blue
gl_setpalettecolor(BLACK, 0, 0, 0); // black
gl_setpalettecolor(GREEN, 0, 63, 0);
gl_setpalettecolor(RED, 63, 0, 0);
gl_setpalettecolor(BROWN, 170/4, 85/4, 0);
gl_setpalettecolor(MAGENTA, 170/4, 0, 170/4);
gl_setpalettecolor(CYAN, 0, 170/4, 170/4);
gl_setpalettecolor(GRAY, 48, 48, 48);
gl_setpalettecolor(LIGHTBLACK, 85/4, 85/4, 85/4);
gl_setpalettecolor(LIGHTBLUE, 85/4, 85/4, 255/4);
gl_setpalettecolor(LIGHTGREEN, 85/4, 255/4, 85/4);
gl_setpalettecolor(LIGHTCYAN, 85/4, 255/4, 255/4);
gl_setpalettecolor(LIGHTRED, 25/45/4, 85/4, 85/4);
gl_setpalettecolor(LIGHTMAGENTA, 255/4, 85/4, 255/4);
gl_setpalettecolor(LIGHTBROWN, 255/4, 255/4, 85/4);
#endif
active_console = 1;
return true;
}
//! [1]
bool SvgalibScreen::initDevice()
{
if (vga_init() != 0) {
qCritical("SvgalibScreen::initDevice(): unable to initialize svgalib");
return false;
}
int mode = vga_getdefaultmode();
if (vga_setmode(mode) == -1) {
qCritical("SvgalibScreen::initialize(): unable to set graphics mode");
return false;
}
if (gl_setcontextvga(mode) != 0) {
qCritical("SvgalibScreen::initDevice(): unable to set vga context");
return false;
}
context = gl_allocatecontext();
gl_getcontext(context);
vga_modeinfo *modeinfo = vga_getmodeinfo(mode);
if (modeinfo->flags & IS_LINEAR)
QScreen::data = vga_getgraphmem();
initColorMap();
QScreenCursor::initSoftwareCursor();
return true;
}
void initscreen(void)
{
int vgamode;
vga_init();
vgamode = G640x480x16;
if (!vga_hasmode(vgamode)) {
printf("Mode not available.\n");
exit(-1);
}
vga_setmode(vgamode);
/* Create virtual screen. */
gl_setcontextvgavirtual(vgamode);
backscreen = gl_allocatecontext();
gl_getcontext(backscreen);
/* Physical screen context. */
vga_setmode(vgamode);
gl_setcontextvga(vgamode);
physicalscreen = gl_allocatecontext();
gl_getcontext(physicalscreen);
gl_setcontext(backscreen);
/*drawgraypalette(); */
gl_clearscreen(0);
// gl_setcontextvga(vgamode);
gl_enableclipping();
gl_setclippingwindow(0, 0, 639, 479);
gl_setwritemode(WRITEMODE_OVERWRITE | FONT_COMPRESSED);
gl_setfont(8, 8, gl_font8x8);
gl_setfontcolors(0, 1);
}
void configure(void)
{
int allowed[GLASTMODE + 1];
for (;;) {
int i;
int m;
for (i = G320x200x16; i <= GLASTMODE; i++) {
allowed[i] = 0;
if (vga_hasmode(i)) {
printf("%2d %s\n", i, vga_getmodename(i));
allowed[i] = 1;
}
}
printf("\nWhich mode? ");
scanf("%d", &m);
getchar();
printf("\n");
if (m >= G320x200x16 && m <= GLASTMODE) {
VGAMODE = m;
if (vga_getmodeinfo(m)->bytesperpixel >= 1)
USEGL = 1;
else
USEGL = 0;
break;
}
}
vga_setmode(VGAMODE);
#ifdef LINEAR_ADDRESSING
vga_setlinearaddressing();
#endif
if (USEGL) {
gl_setcontextvga(VGAMODE);
physicalscreen = gl_allocatecontext();
gl_getcontext(physicalscreen);
}
}
void demo3(void)
{
int x, y;
int targetx, targety;
int count, startclock;
GraphicsContext *virtualscreen;
GraphicsContext *physicalscreen;
/* Window coordinate initially at center. */
x = VWIDTH / 2 - WINWIDTH / 2;
y = VHEIGHT / 2 - WINHEIGHT / 2;
targetx = x;
targety = y;
virtualscreen = gl_allocatecontext();
gl_getcontext(virtualscreen);
gl_setcontextvga(G320x200x256);
physicalscreen = gl_allocatecontext();
gl_getcontext(physicalscreen);
gl_setcontext(virtualscreen);
count = 0;
startclock = clock();
for (;;) {
vga_waitretrace();
/* Copy window to screen. */
gl_copyboxtocontext(x, y, WINWIDTH, WINHEIGHT, physicalscreen,
0, 0);
if (x == targetx && y == targety) {
/* Create new target. */
targetx = rand() % (VWIDTH - WINWIDTH);
targety = rand() % (VHEIGHT - WINHEIGHT);
}
/* Move towards target. */
if (x < targetx)
x++;
if (x > targetx)
x--;
if (y < targety)
y++;
if (y > targety)
y--;
/* Boundary checks. */
if (x < 0)
x = 0;
if (x > VWIDTH - WINWIDTH)
x = VWIDTH - WINWIDTH;
if (y < 0)
y = 0;
if (y > VHEIGHT - WINHEIGHT)
y = VHEIGHT - WINHEIGHT;
if (vga_getkey())
break;
count++;
}
printf("Method 3: frame rate %ld\n", count * CLOCKS_PER_SEC
/ (clock() - startclock));
}
int main() {
int maxCols = 1024;
int maxRows = 768;
int maxIterations = 2048;
int maxSize = 4;
float Xmin = -2.0;
float Xmax = 1.2;
float Ymin = -1.2;
float Ymax = 1.2;
double X, Y;
double Xsquare, Ysquare;
double currentP;
double currentQ[767];
double deltaP, deltaQ;
int color;
int currentRow, currentCol;
deltaP = (Xmax - Xmin)/(double)maxCols;
deltaQ = (Ymax - Ymin)/(double)maxRows;
currentQ[0] = Ymax;
for (currentRow = 1; currentRow < maxRows; currentRow++) {
currentQ[currentRow] = currentQ[currentRow-1] - deltaQ;
}
currentP = Xmin;
vga_init();
vga_setmode(G1024x768x256);
gl_setcontextvga(G1024x768x256);
physicalscreen = gl_allocatecontext();
gl_getcontext(physicalscreen);
gl_setcontextvgavirtual(G1024x768x256);
virtualscreen = gl_allocatecontext();
gl_getcontext(virtualscreen);
gl_setcontext(virtualscreen);
for (currentCol = 0; currentCol < maxCols; currentCol++) {
for (currentRow = 0; currentRow < maxRows; currentRow++) {
X = 0.0;
Y = 0.0;
Xsquare = 0.0;
Ysquare = 0.0;
color = 0;
while ((color <= maxIterations) && (Xsquare + Ysquare <= maxSize)) {
Xsquare = X * X;
Ysquare = Y * Y;
Y = (2*X*Y) + currentQ[currentRow];
X = (Xsquare - Ysquare) + currentP;
color++;
}
gl_setpixel(currentCol, currentRow, color % 256);
}
currentP = currentP + deltaP;
gl_copyscreen(physicalscreen);
}
vga_getch();
gl_clearscreen(0);
vga_setmode(TEXT);
return 0;
}
void test(void)
{
int i, j;
unsigned char *bitmap;
GraphicsContext *savedcontext;
if (VIRTUAL)
gl_setcontext(backscreen);
gl_clearscreen(0);
for (i = 0; i < 5; i++) {
gl_clearscreen(0);
for (j = 0; j < 20000; j++)
gl_setpixel(random() % WIDTH, random() % HEIGHT,
random() % COLORS);
}
if (VIRTUAL)
gl_copyscreen(physicalscreen);
gl_clearscreen(0);
for (i = 0; i < 5000; i++) {
int x, y;
x = random() % (WIDTH - 1);
y = random() % (HEIGHT - 1);
gl_fillbox(x, y, random() % (WIDTH - x), random()
% (HEIGHT - y), random() % COLORS);
}
if (VIRTUAL)
gl_copyscreen(physicalscreen);
gl_clearscreen(0);
for (i = 0; i < 4000; i++)
gl_line(random() % WIDTH, random() % HEIGHT,
random() % WIDTH, random() % HEIGHT,
random() % COLORS);
if (VIRTUAL)
gl_copyscreen(physicalscreen);
/* Create bitmap. */
bitmap = malloc(64 * 64 * BYTESPERPIXEL);
/* Create temporary graphics context to create bitmap in. */
savedcontext = gl_allocatecontext();
gl_getcontext(savedcontext);
gl_setcontextvirtual(64, 64, BYTESPERPIXEL, BITSPERPIXEL, bitmap);
/* The rgb functions can be used to create nice bitmaps easily for */
/* hicolor/truecolor modes. The 256 color 'emulated' truecolor */
/* looks less impressive. */
for (i = 0; i < 32; i++)
for (j = 0; j < 32; j++) {
int c;
c = 255 - (i + j) * 4;
gl_setpixelrgb(31 - i, 31 - j, c, 0, 0);
gl_setpixelrgb(32 + i, 31 - j, c, c, 0);
gl_setpixelrgb(31 - i, 32 + j, c, 0, c);
gl_setpixelrgb(32 + i, 32 + j, c, c, c);
}
/* Restore previous context. */
gl_setcontext(savedcontext);
gl_clearscreen(0);
for (i = 0; i < 4000; i++) {
int x, y;
x = random() % (WIDTH - 64 + 1);
y = random() % (HEIGHT - 64 + 1);
gl_putbox(x, y, 64, 64, bitmap);
}
free(bitmap);
if (VIRTUAL)
gl_copyscreen(physicalscreen);
}
int gr_set_mode(u_int32_t mode)
{
unsigned int w, h;
char vgamode[16];
vga_modeinfo *modeinfo;
int modenum, rowsize;
void *framebuffer;
#ifdef NOGRAPH
return 0;
#endif
if (mode<=0)
return 0;
w=SM_W(mode);
h=SM_H(mode);
gr_palette_clear();
sprintf(vgamode, "G%dx%dx256", w, h);
modenum = vga_getmodenumber(vgamode);
vga_setmode(modenum);
#ifdef SVGALIB_INPUT
mouse_seteventhandler(mouse_handler);
#endif
modeinfo = vga_getmodeinfo(modenum);
if (modeinfo->flags & CAPABLE_LINEAR)
{
usebuffer = 0;
vga_setlinearaddressing();
// Set up physical screen only
gl_setcontextvga(modenum);
physicalscreen = gl_allocatecontext();
gl_getcontext(physicalscreen);
screenbuffer = physicalscreen;
framebuffer = physicalscreen->vbuf;
rowsize = physicalscreen->bytewidth;
}
else
{
usebuffer = 1;
// Set up the physical screen
gl_setcontextvga(modenum);
physicalscreen = gl_allocatecontext();
gl_getcontext(physicalscreen);
// Set up the virtual screen
gl_setcontextvgavirtual(modenum);
screenbuffer = gl_allocatecontext();
gl_getcontext(screenbuffer);
framebuffer = screenbuffer->vbuf;
rowsize = screenbuffer->bytewidth;
}
memset(grd_curscreen, 0, sizeof(grs_screen));
grd_curscreen->sc_mode = mode;
grd_curscreen->sc_w = w;
grd_curscreen->sc_h = h;
grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = rowsize;
grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_LINEAR;
grd_curscreen->sc_canvas.cv_bitmap.bm_data = framebuffer;
gr_set_current_canvas(NULL);
gamefont_choose_game_font(w,h);
return 0;
}
