// important Note: Do not cause Console Output while drawing
// otherwise, a stack overflow will occur!
private unsafe void DrawChar(int screenX, int screenY, int charIdx)
{
if (screenX >= Columns || screenY >= Rows)
{
return;
}
// TODO: Improve
var fontSec = KernelElf.Main.GetSectionHeader("consolefont.regular");
var fontSecAddr = KernelElf.Main.GetSectionPhysAddr(fontSec);
var fontHeader = (PSF1Header *)fontSecAddr;
var rows = (int)fontHeader->Charsize;
var bytesPerRow = 1; //14 bits --> 2 bytes + 2fill bits
int columns = 8;
var charSize = bytesPerRow * rows;
var charMem = (byte *)(fontSecAddr + sizeof(PSF1Header));
for (int y = 0; y < rows; y++)
{
for (int x = 0; x < columns; x++)
{
var bt = BitHelper.IsBitSet(charMem[(charSize * charIdx) + (y * bytesPerRow) + (x / 8)], (byte)(7 - (x % 8)));
if (bt)
{
dev.SetPixel((screenX * columns) + x, (screenY * rows) + y, int.MaxValue / 2);
}
}
}
}
/// <summary>Draws the string.</summary>
public void DrawString(IFrameBuffer frameBuffer, uint color, uint x, uint y, string text)
{
int size8 = size / 8;
string[] lines = text.Split('\n');
for (int l = 0; l < lines.Length; l++)
{
int usedX = 0;
for (int i = 0; i < lines[l].Length; i++)
{
char c = lines[l][i];
int index = charset.IndexOf(c);
if (index < 0)
{
usedX += size / 2;
continue;
}
int maxX = 0, sizePerFont = size * size8 * index, X = usedX + (int)x, Y = (int)y + size * l;
for (int h = 0; h < size; h++)
{
for (int aw = 0; aw < size8; aw++)
{
for (int ww = 0; ww < 8; ww++)
{
if ((buffer[sizePerFont + (h * size8) + aw] & (0x80 >> ww)) != 0)
{
int max = (aw * 8) + ww;
int xx = X + max;
int yy = Y + h;
frameBuffer.SetPixel(color, (uint)xx, (uint)yy);
if (max > maxX)
{
maxX = max;
}
}
}
}
}
usedX += maxX + 2;
}
}
}
/// <summary>Draws the string.</summary>
public void DrawString(IFrameBuffer frameBuffer, uint color, uint x, uint y, string text)
{
for (uint c = 0; c < text.Length; c++)
{
int offset = ((byte)text[(int)c] & 0xFF) * 16;
byte[] fontbuf = new byte[16];
for (int k = 0; k < fontbuf.Length; k++)
{
fontbuf[k] = Buffer[offset + k];
}
for (uint i = 0; i < 16; i++)
{
for (uint j = 0; j < 8; j++)
{
if ((fontbuf[i] & (0x80 >> (int)j)) != 0)
{
frameBuffer.SetPixel(color, x + j + (c * 8), y + i);
}
}
}
}
}
/// <summary>
/// Writes the pixel.
/// </summary>
/// <param name="color">The color.</param>
/// <param name="x">The x.</param>
/// <param name="y">The y.</param>
void IPixelGraphicsDevice.WritePixel(Color color, ushort x, ushort y)
{
frameBuffer.SetPixel(ConvertColor(color), x, y);
UpdateFrame(x, y, 1, 1);
}
public void SetPixel(int x, int y, uint nativeColor)
{
Dev.SetPixel(x, y, nativeColor);
}
/// <summary>
/// Writes the pixel.
/// </summary>
/// <param name="color">The color.</param>
/// <param name="x">The x.</param>
/// <param name="y">The y.</param>
public void WritePixel(Color color, ushort x, ushort y)
{
frameBuffer.SetPixel(ConvertColor(color), x, y);
UpdateFrame(x, y, 1, 1);
}
//ToDo: fix draw line
public static void DrawLine(this IFrameBuffer buffer, int x, int y, int x2, int y2, Color c)
{
int w = x2 - x;
int h = y2 - y;
int dx1 = 0, dy1 = 0, dx2 = 0, dy2 = 0;
if (w < 0)
{
dx1 = -1;
}
else if (w > 0)
{
dx1 = 1;
}
if (h < 0)
{
dy1 = -1;
}
else if (h > 0)
{
dy1 = 1;
}
if (w < 0)
{
dx2 = -1;
}
else if (w > 0)
{
dx2 = 1;
}
int longest = Math.Abs(w);
int shortest = Math.Abs(h);
if (!(longest > shortest))
{
longest = Math.Abs(h);
shortest = Math.Abs(w);
if (h < 0)
{
dy2 = -1;
}
else if (h > 0)
{
dy2 = 1;
}
dx2 = 0;
}
int numerator = longest >> 1;
for (int i = 0; i <= longest; i++)
{
buffer.SetPixel(c, (uint)x, (uint)y);
numerator += shortest;
if (!(numerator < longest))
{
numerator -= longest;
x += dx1;
y += dy1;
}
else
{
x += dx2;
y += dy2;
}
}
}
/// <summary>Writes a single pixel.</summary>
/// <param name="color">The color.</param>
/// <param name="x">The x.</param>
/// <param name="y">The y.</param>
public void WritePixel(Color color, ushort x, ushort y)
{
frameBuffer.SetPixel(ConvertColorToUInt(color), x, y);
}
