public void pixel_high_res(ImageBuffer sourceImage, RGBA_Bytes[] destBuffer, int destBufferOffset, int x, int y)
{
int r, g, b, a;
r = g = b = a = LineAABasics.line_subpixel_scale * LineAABasics.line_subpixel_scale / 2;
int weight;
int x_lr = x >> LineAABasics.line_subpixel_shift;
int y_lr = y >> LineAABasics.line_subpixel_shift;
x &= LineAABasics.line_subpixel_mask;
y &= LineAABasics.line_subpixel_mask;
int sourceOffset;
byte[] ptr = sourceImage.GetPixelPointerXY(x_lr, y_lr, out sourceOffset);
weight = (LineAABasics.line_subpixel_scale - x) *
(LineAABasics.line_subpixel_scale - y);
r += weight * ptr[sourceOffset + ImageBuffer.OrderR];
g += weight * ptr[sourceOffset + ImageBuffer.OrderG];
b += weight * ptr[sourceOffset + ImageBuffer.OrderB];
a += weight * ptr[sourceOffset + ImageBuffer.OrderA];
sourceOffset += sourceImage.GetBytesBetweenPixelsInclusive();
weight = x * (LineAABasics.line_subpixel_scale - y);
r += weight * ptr[sourceOffset + ImageBuffer.OrderR];
g += weight * ptr[sourceOffset + ImageBuffer.OrderG];
b += weight * ptr[sourceOffset + ImageBuffer.OrderB];
a += weight * ptr[sourceOffset + ImageBuffer.OrderA];
ptr = sourceImage.GetPixelPointerXY(x_lr, y_lr + 1, out sourceOffset);
weight = (LineAABasics.line_subpixel_scale - x) * y;
r += weight * ptr[sourceOffset + ImageBuffer.OrderR];
g += weight * ptr[sourceOffset + ImageBuffer.OrderG];
b += weight * ptr[sourceOffset + ImageBuffer.OrderB];
a += weight * ptr[sourceOffset + ImageBuffer.OrderA];
sourceOffset += sourceImage.GetBytesBetweenPixelsInclusive();
weight = x * y;
r += weight * ptr[sourceOffset + ImageBuffer.OrderR];
g += weight * ptr[sourceOffset + ImageBuffer.OrderG];
b += weight * ptr[sourceOffset + ImageBuffer.OrderB];
a += weight * ptr[sourceOffset + ImageBuffer.OrderA];
destBuffer[destBufferOffset].red = (byte)(r >> LineAABasics.line_subpixel_shift * 2);
destBuffer[destBufferOffset].green = (byte)(g >> LineAABasics.line_subpixel_shift * 2);
destBuffer[destBufferOffset].blue = (byte)(b >> LineAABasics.line_subpixel_shift * 2);
destBuffer[destBufferOffset].alpha = (byte)(a >> LineAABasics.line_subpixel_shift * 2);
}
private void BlendInFilterPixel(int[] accumulatedColor, ref int sourceAlpha, int back_r, int back_g, int back_b, int back_a, ImageBuffer SourceRenderingBuffer, int maxx, int maxy, int x_lr, int y_lr, int weight)
{
byte[] fg_ptr;
unchecked
{
if ((uint)x_lr <= (uint)maxx && (uint)y_lr <= (uint)maxy)
{
int bufferIndex;
fg_ptr = SourceRenderingBuffer.GetPixelPointerXY(x_lr, y_lr, out bufferIndex);
accumulatedColor[0] += weight * fg_ptr[bufferIndex + ImageBuffer.OrderR];
accumulatedColor[1] += weight * fg_ptr[bufferIndex + ImageBuffer.OrderG];
accumulatedColor[2] += weight * fg_ptr[bufferIndex + ImageBuffer.OrderB];
sourceAlpha += weight * base_mask;
}
else
{
accumulatedColor[0] += back_r * weight;
accumulatedColor[1] += back_g * weight;
accumulatedColor[2] += back_b * weight;
sourceAlpha += back_a * weight;
}
}
}