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

2011-02-24 00:22:00 -08:00 · 2011-02-24 00:22:00 -08:00 · 00bae13bba
commit 00bae13bba
586 changed files with 129057 additions and 0 deletions
--- a/demos/testlinear.c
+++ b/demos/testlinear.c
@ -0,0 +1,124 @@
+
+/* 
+   Simple test program for Cirrus linear addressing/color expansion.
+   vgagl can take advantage of it (linear addressing).
+ */
+
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <vga.h>
+#include <time.h>
+#include "../src/libvga.h"
+
+
+#define USE_LINEAR_ADDRESSING
+/* #define USE_BY16_ADDRESSING */
+
+
+unsigned char *vbuf;
+
+#if 0
+/* This function is Cirrus specific and has nothing to do with linear
+ * addressing. */
+void by8test(void)
+{
+    int i;
+    int startclock, diffclock;
+
+    /* Enable extended write modes and BY8/16 addressing. */
+    outb(0x3ce, 0x0b);
+
+#ifdef USE_BY16_ADDRESSING
+    outb(0x3cf, inb(0x3cf) | 0x16);
+#else
+    outb(0x3cf, inb(0x3cf) | 0x06);
+#endif
+    /* Set extended write mode 4. */
+    outb(0x3ce, 0x05);
+    outb(0x3cf, (inb(0x3cf) & 0xf8) | 4);
+
+    /* Set pixel mask register (coincides with VGA plane mask register). */
+    outw(0x3c4, 0xff02);
+
+    startclock = clock();
+    for (i = 0; i < 248; i++) {
+	outw(0x3ce, 0x01 + (i << 8));	/* Set foreground color. */
+#ifdef USE_BY16_ADDRESSING
+	outw(0x3ce, 0x11 + (i << 8));	/* Set high byte. */
+	memset(vbuf, 0xff, 640 * 480 / 16);
+#else
+	memset(vbuf, 0xff, 640 * 480 / 8);
+#endif
+    }
+    diffclock = clock() - startclock;
+    printf("Color expansion framebuffer fill speed: %dK/s\n",
+	   640 * 480 * 248 / diffclock / 10);
+}
+#endif
+
+int main(int argc, char *argv[])
+{
+    int i,j;
+
+    if (!(argc == 2 && strcmp(argv[1], "--force") == 0))
+	if (!(vga_getmodeinfo(vga_getdefaultmode())->flags & CAPABLE_LINEAR)) {
+	    printf("Linear addressing not supported for this chipset.\n");
+	    exit(1);
+	}
+    vga_init();
+    vga_setmode(vga_getdefaultmode());
+    vga_setpage(0);
+#ifdef USE_LINEAR_ADDRESSING
+    if (vga_setlinearaddressing() == -1) {
+	vga_setmode(TEXT);
+	printf("Could not set linear addressing.\n");
+	exit(-1);
+    }
+#endif
+
+    /* Should not mess with bank register after this. */
+
+    vbuf = vga_getgraphmem();
+    printf("vbuf mapped at %08lx.\n", (unsigned long) vbuf);
+
+    getchar();
+
+#ifdef USE_LINEAR_ADDRESSING
+    memset(vbuf, 0x88, 640 * 480);
+    sleep(1);
+
+    memset(vbuf, 0, 640 * 480);
+    for (i = 0; i < 100000; i++)
+	*(vbuf + (rand() & 0xfffff)) = rand();
+#endif
+
+#if 0
+    if (vga_getcurrentchipset() == CIRRUS)
+		/* Show the bandwidth of the extended write modes of the */
+		/* Cirrus chip. */
+		by8test();
+#endif
+
+    getchar();
+    for(i = 0;i < 44;i++){
+      *(vbuf + i) = 0x1c;
+      *(vbuf + 640*17 + i) = 0x1c;
+      *(vbuf + 640*480 - i) = 0x1c;
+      *(vbuf + 640*480 - 1 - 640*17 - i) = 0x1c;
+      for(j = 1;j < 17;j++){
+	*(vbuf + 640*j + i) = (i == 0 || i == 43)? 0x1c:0;
+	*(vbuf + 640*480 - 1 - 640*j - i) = (i == 0 || i == 43)? 0x1c:0;
+      }
+    }
+    for(i = 3;i < 10;i++)
+      for(j = 4;j < 10;j++){
+	*(vbuf + i + 640*j) = 0x3f;
+	*(vbuf + 640*480 -1 -640*j - i) = 0x3f;
+      }
+    getchar();
+    vga_setmode(TEXT);
+    return 0;
+}