Initial. Don't... just don't ask.

demos/bankspeed.c

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+
+#include <stdlib.h>
+#include <stdio.h>
+#include <vga.h>
+#include <vgagl.h>
+#include <time.h>
+#include <unistd.h>
+
+/* The logo was drawn by John Remyn. */
+/* Feel free to provide a more beautiful/official/thought provoking/cool */
+/* logo to replace it. */
+#define LOGOWIDTH 201
+#define LOGOHEIGHT 85
+
+int VGAMODE;
+int VIRTUAL;
+
+GraphicsContext *backscreen;
+GraphicsContext *physicalscreen;
+void *logobitmap;
+
+
+void loadbitmap(char *filename, void *buf)
+{
+    FILE *f;
+    f = fopen(filename, "rb");
+    if(f==NULL)return;
+    fread(buf, 1, 17095, f);
+    fclose(f);
+}
+
+
+void test(void)
+{
+    int i, j;
+
+    if (VIRTUAL)
+	gl_setcontext(backscreen);
+
+    gl_clearscreen(0);
+    for (i = 0; i < 5; i++) {
+	gl_clearscreen(0);
+	for (j = 0; j < 100000; j++)
+	    gl_setpixel(random() % WIDTH, random() % HEIGHT,
+			random() % COLORS);
+    }
+
+    if (VIRTUAL)
+	gl_copyscreen(physicalscreen);
+
+}
+
+
+void setcustompalette(void)
+{
+    /* colors 0-31 are an RGB mix (bits 0 and 1 red, 2 green, 3 and 4 blue) */
+    /* 32-63    black to red */
+    /* 64-95    black to green */
+    /* 96-127   black to yellow */
+    /* 128-159  black to blue */
+    /* 160-191  black to magenta */
+    /* 192-223  black to cyan */
+    /* 224-255  black to white */
+    Palette pal;
+    int i;
+    for (i = 0; i < 256; i++) {
+	int r, g, b;
+	r = g = b = 0;
+	if ((i & 32) > 0)
+	    r = (i & 31) << 1;
+	if ((i & 64) > 0)
+	    g = (i & 31) << 1;
+	if ((i & 128) > 0)
+	    b = (i & 31) << 1;
+	if (i < 32) {
+	    r = (i & 3) << 4;	/* 2 bits */
+	    g = (i & 4) << 3;	/* 1 bit */
+	    b = (i & 24) << 1;	/* 2 bits */
+	}
+	pal.color[i].red = r;
+	pal.color[i].green = g;
+	pal.color[i].blue = b;
+    }
+    gl_setpalette(&pal);
+}
+
+
+void logotest(void)
+{
+    int h;
+    void *scaled;
+    /* Set logo palette. */
+    setcustompalette();
+    /* Create logo bitmap */
+    logobitmap = alloca(LOGOWIDTH * LOGOHEIGHT);
+    loadbitmap("linuxlogo.bitmap", logobitmap);
+    /* Allocate buffer for scaled bitmap. */
+    scaled = alloca(WIDTH * HEIGHT);
+    gl_clearscreen(0);
+    /* Stretch vertically. */
+    for (h = 0; h <= LOGOHEIGHT; h++) {
+	gl_scalebox(LOGOWIDTH, LOGOHEIGHT, logobitmap,
+		    LOGOWIDTH, h, scaled);
+	gl_putbox(0, 0, LOGOWIDTH, h, scaled);
+	if (VIRTUAL)
+	    gl_copyscreen(physicalscreen);
+    }
+    gl_clearscreen(0);
+    /* Scale to screen resolution. */
+    gl_scalebox(LOGOWIDTH, LOGOHEIGHT, logobitmap, WIDTH, HEIGHT, scaled);
+    gl_putbox(0, 0, WIDTH, HEIGHT, scaled);
+    gl_copyscreen(physicalscreen);
+}
+
+
+int main(void)
+{
+    clock_t t1, t2;
+    
+    vga_init();
+    t1=clock();
+    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();
+
+    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();
+
+    if (VIRTUAL)
+	gl_freecontext(backscreen);
+    t2=clock();
+    printf("total:%1.2f sec\n",(1.0*t2-t1)/CLOCKS_PER_SEC); 
+    vga_setmode(TEXT);
+    exit(0);
+}