public void PaintPixelsInRam(StrokeVector stroke, float brushAlpha, TextureMeta image, BrushConfig bc,
PlaytimePainter painter)
{
var volume = image.texture2D.GetVolumeTextureData();
if (!volume)
{
return;
}
bc.brush3DRadius = Mathf.Min(BrushScaleMaxForCpu(volume), bc.brush3DRadius);
var volumeScale = volume.size;
var pos = (stroke.posFrom - volume.transform.position) / volumeScale + 0.5f * Vector3.one;
var height = volume.Height;
var texWidth = image.width;
BlitFunctions.brAlpha = brushAlpha;
bc.PrepareCpuBlit(image);
BlitFunctions.half = bc.Size(true) / volumeScale;
var pixels = image.Pixels;
var iHalf = (int)(BlitFunctions.half - 0.5f);
var smooth = bc.GetBrushType(true) != BrushTypes.Pixel.Inst;
if (smooth)
{
iHalf += 1;
}
BlitFunctions.alphaMode = BlitFunctions.SphereAlpha;
var sliceWidth = texWidth / volume.hSlices;
var hw = sliceWidth / 2;
var y = (int)pos.y;
var z = (int)(pos.z + hw);
var x = (int)(pos.x + hw);
for (BlitFunctions.y = -iHalf; BlitFunctions.y < iHalf + 1; BlitFunctions.y++)
{
var h = y + BlitFunctions.y;
if (h >= height)
{
return;
}
if (h < 0)
{
continue;
}
var hy = h / volume.hSlices;
var hx = h % volume.hSlices;
var hTexIndex = (hy * texWidth + hx) * sliceWidth;
for (BlitFunctions.z = -iHalf; BlitFunctions.z < iHalf + 1; BlitFunctions.z++)
{
var trueZ = z + BlitFunctions.z;
if (trueZ < 0 || trueZ >= sliceWidth)
{
continue;
}
var yTexIndex = hTexIndex + trueZ * texWidth;
for (BlitFunctions.x = -iHalf; BlitFunctions.x < iHalf + 1; BlitFunctions.x++)
{
if (!BlitFunctions.alphaMode())
{
continue;
}
var trueX = x + BlitFunctions.x;
if (trueX < 0 || trueX >= sliceWidth)
{
continue;
}
var texIndex = yTexIndex + trueX;
BlitFunctions.blitMode(ref pixels[texIndex]);
}
}
}
}
public bool PaintTexture2D(StrokeVector stroke, float brushAlpha, TextureMeta image, BrushConfig bc, PlaytimePainter painter)
{
if (!painter.IsAtlased())
{
return(false);
}
var uvCoords = stroke.uvFrom;
var atlasedSection = GetAtlasedSection();
sectorSize = image.width / atlasRows;
atlasSector.From(atlasedSection * sectorSize);
BlitFunctions.brAlpha = brushAlpha;
BlitFunctions.half = (bc.Size(false)) / 2;
var iHalf = Mathf.FloorToInt(BlitFunctions.half - 0.5f);
var smooth = bc.GetBrushType(true) != BrushTypes.Pixel.Inst;
if (smooth)
{
BlitFunctions.alphaMode = BlitFunctions.CircleAlpha;
}
else
{
BlitFunctions.alphaMode = BlitFunctions.NoAlpha;
}
BlitFunctions.blitMode = bc.GetBlitMode(true).BlitFunctionTex2D(image);
if (smooth)
{
iHalf += 1;
}
BlitFunctions.alpha = 1;
BlitFunctions.Set(bc.mask);
BlitFunctions.cSrc = bc.Color;
var tmp = image.UvToPixelNumber(uvCoords);
var fromX = tmp.x - iHalf;
tmp.y -= iHalf;
var pixels = image.Pixels;
for (BlitFunctions.y = -iHalf; BlitFunctions.y < iHalf + 1; BlitFunctions.y++)
{
tmp.x = fromX;
for (BlitFunctions.x = -iHalf; BlitFunctions.x < iHalf + 1; BlitFunctions.x++)
{
if (BlitFunctions.alphaMode())
{
var sx = tmp.x - atlasSector.x;
var sy = tmp.y - atlasSector.y;
sx %= sectorSize;
if (sx < 0)
{
sx += sectorSize;
}
sy %= sectorSize;
if (sy < 0)
{
sy += sectorSize;
}
BlitFunctions.blitMode(ref pixels[((atlasSector.y + sy)) * image.width + (atlasSector.x + sx)]);
}
tmp.x += 1;
}
tmp.y += 1;
}
return(true);
}