public void drawPixmap(Pixmap pixmap, int srcX, int srcY, int srcWidth, int srcHeight, int dstX, int dstY, int dstWidth, int dstHeight)
{
if (srcWidth == dstWidth && srcHeight == dstHeight)
{
for (var x = 0; x < srcWidth; x++)
{
for (var y = 0; y < srcHeight; y++)
{
drawPixel(dstX + x, dstY + y, (uint)pixmap.getPixel(srcX + x, srcY + y));
}
}
}
else if (_filter == PixmapFilter.NEAREST_NEIGHBOUR)
{
var xRatio = (float)srcWidth / dstWidth;
var yRatio = (float)srcHeight / dstHeight;
for (var x = dstX; x < dstX + dstWidth; x++)
{
for (var y = dstY; y < dstY + dstWidth; y++)
{
var srcPixX = (int)Math.Round((x - dstX + srcX) * xRatio, MidpointRounding.AwayFromZero);
var srcPixY = (int)Math.Round((y - dstY + srcY) * yRatio, MidpointRounding.AwayFromZero);
drawPixel(x, y, (uint)pixmap.getPixel(srcPixX, srcPixY));
}
}
}
else
{
for (int x = 0; x < dstWidth; ++x)
{
for (int y = 0; y < dstWidth; ++y)
{
float gx = ((float)x) / dstWidth * (srcWidth - 1);
float gy = ((float)y) / dstWidth * (srcWidth - 1);
int gxi = (int)gx;
int gyi = (int)gy;
var c00 = (uint)pixmap.getPixel(gxi, gyi);
var c10 = (uint)pixmap.getPixel(gxi + 1, gyi);
var c01 = (uint)pixmap.getPixel(gxi, gyi + 1);
var c11 = (uint)pixmap.getPixel(gxi + 1, gyi + 1);
UInt32 red = (byte)blerp(MonoGameColor.getRAsByte(c00), MonoGameColor.getRAsByte(c10), MonoGameColor.getRAsByte(c01), MonoGameColor.getRAsByte(c11), gx - gxi, gy - gyi);
UInt32 green = (byte)blerp(MonoGameColor.getGAsByte(c00), MonoGameColor.getGAsByte(c10), MonoGameColor.getGAsByte(c01), MonoGameColor.getGAsByte(c11), gx - gxi, gy - gyi);
UInt32 blue = (byte)blerp(MonoGameColor.getBAsByte(c00), MonoGameColor.getBAsByte(c10), MonoGameColor.getBAsByte(c01), MonoGameColor.getBAsByte(c11), gx - gxi, gy - gyi);
UInt32 alpha = (byte)blerp(MonoGameColor.getAAsByte(c00), MonoGameColor.getAAsByte(c10), MonoGameColor.getAAsByte(c01), MonoGameColor.getAAsByte(c11), gx - gxi, gy - gyi);
var color = ((red << 24) & 0xff000000) |
((green << 16) & 0xff0000) |
((blue << 8) & 0xff00) |
alpha;
drawPixel(dstX + x, dstY + y, color);
}
}
}
}
public void drawPixel(int x, int y, UInt32 color, bool blend = true)
{
var colorAlpha = MonoGameColor.getAAsByte(color);
if (x < getWidth() && y < getHeight() && x >= 0 && y >= 0 && colorAlpha > 0)
{
if (colorAlpha == 255 || !blend)
{
_pixmap[x, y] = color;
}
else
{
var newR = (byte)(MonoGameColor.getRAsByte(color) * colorAlpha + MonoGameColor.getAAsByte((uint)getPixel(x, y)) * (255 - colorAlpha));
var newG = (byte)(MonoGameColor.getRAsByte(color) * colorAlpha + MonoGameColor.getAAsByte((uint)getPixel(x, y)) * (255 - colorAlpha));
var newB = (byte)(MonoGameColor.getRAsByte(color) * colorAlpha + MonoGameColor.getAAsByte((uint)getPixel(x, y)) * (255 - colorAlpha));
_pixmap[x, y] = MonoGameColor.toRGBA8888(newR, newG, newB, colorAlpha);
}
}
}
