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[bochs] Various extensibility fixes

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This commit is contained in:
Kevin Lange 2011-03-27 12:43:08 -05:00
parent 2686ba9cc1
commit f0d0d8421c
1 changed files with 27 additions and 7 deletions
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34
kernel/core/video/bochs.c
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@ -15,14 +15,21 @@ uint16_t bochs_current_bank = 0;
#define BOCHS_BANK_SIZE 16384
#define BOCHS_VID_MEMORY ((uint32_t *)0xA0000)
#define BOCHS_BANKS (1024 * 768 / BOCHS_BANK_SIZE)
#define BOCHS_BANKS (bochs_resolution_x * bochs_resolution_y * bochs_resolution_b / (BOCHS_BANK_SIZE * 32))
void
graphics_install_bochs() {
outports(0x1CE, 0x00);
uint16_t i = inports(0x1CF);
if (i < 0xB0C0 || i > 0xB0C6) {
kprintf("[bochs] You are not a Bochs VBE pseudo-card!\n");
kprintf("[bochs] 0x%x is totally wrong!\n", (unsigned int)i);
return;
}
kprintf("[bochs] Successfully detected a Bochs VBE setup!\n");
kprintf("[bochs] You are using QEMU or Bochs and I love you.\n");
outports(0x1CF, 0xB0C4);
short i = inports(0x1CF);
kprintf("[bochs] Graphics ID is %x\n", (unsigned int)i);
i = inports(0x1CF);
kprintf("[bochs] Enabling 1024x768x32 graphics mode!\n");
/* Disable VBE */
outports(0x1CE, 0x04);
@ -30,12 +37,15 @@ graphics_install_bochs() {
/* Set X resolution to 1024 */
outports(0x1CE, 0x01);
outports(0x1CF, 1024);
bochs_resolution_x = 1024;
/* Set Y resolution to 768 */
outports(0x1CE, 0x02);
outports(0x1CF, 768);
bochs_resolution_y = 768;
/* Set bpp to 32 */
outports(0x1CE, 0x03);
outports(0x1CF, 0x20);
bochs_resolution_b = 32;
/* Re-enable VBE */
outports(0x1CE, 0x04);
outports(0x1CF, 0x01);
@ -82,19 +92,29 @@ bochs_scroll() {
void
bochs_draw_logo() {
/* This is slow and ineffecient, but it's also dead simple. */
fs_node_t * file = kopen("/bs.bmp",0);
char *bufferb = malloc(file->length);
/* Read the boot logo */
size_t bytes_read = read_fs(file, 0, file->length, (uint8_t *)bufferb);
size_t i;
uint16_t x = 0;
uint16_t y = 0;
uint16_t x = 0; /* -> 212 */
uint16_t y = 0; /* -> 68 */
/* Get the width / height of the image */
signed int *bufferi = (signed int *)((uintptr_t)bufferb + 2);
uint32_t width = bufferi[4];
uint32_t height = bufferi[5];
/* Skip right to the important part */
for (i = 54; i < bytes_read; i += 3) {
/* Extract the color */
uint32_t color = bufferb[i] +
bufferb[i+1] * 0x100 +
bufferb[i+2] * 0x10000;
bochs_set_coord(406 + x, 350 + (68 - y), color);
/* Set our point */
bochs_set_coord((bochs_resolution_x - width) / 2 + x, (bochs_resolution_y - height) / 2 + (height - y), color);
++x;
if (x == 212) {
/* If we hit the end of the line, move on */
if (x == width) {
x = 0;
++y;
}