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Say hello, kernel!

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This commit is contained in:
Eryn Wells 2016-02-27 13:50:51 -05:00
parent d8c96e8eed
commit f750094b13
4 changed files with 66 additions and 6 deletions
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52
src/Console.cc
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@ -32,20 +32,64 @@ makeVGAEntry(char c,
Console::Console()
: mBase(reinterpret_cast<uint16_t *>(0xB8000)),
mCursor{0, 0}
mCursor{0, 0},
mColor(makeVGAColor(Console::Color::LightGray, Console::Color::Black))
{ }
void
Console::clear(Console::Color color)
{
const uint16_t vgaColor = makeVGAColor(Color::LightGray, color);
setColor(Color::LightGray, color);
for (size_t y = 0; y < Console::Height; y++) {
for (size_t x = 0; x < Console::Width; x++) {
const size_t index = y * Console::Width + x;
mBase[index] = makeVGAEntry(' ', vgaColor);
putEntryAt(x, y, ' ', mColor);
}
}
}
void
Console::writeChar(char c)
{
putEntryAt(mCursor.col, mCursor.row, c, mColor);
if (++mCursor.col == Console::Width) {
mCursor.col = 0;
if (++mCursor.row == Console::Height) {
mCursor.row = 0;
}
}
}
void
Console::writeString(const char *str)
{
// XXX: THIS IS VERY UNSAFE. PUT DOWN THE POINTER ERYN. NO BAD ERYN DONT YOU DARE.
const char *cur = str;
while (*cur != '\0') {
writeChar(*cur++);
}
}
void
Console::setColor(Console::Color fg,
Console::Color bg)
{
mColor = makeVGAColor(fg, bg);
}
/*
* Private
*/
void
Console::putEntryAt(size_t x,
size_t y,
char c,
uint8_t color)
{
const size_t index = y * Console::Width + x;
mBase[index] = makeVGAEntry(c, color);
}
} /* namespace kernel */