/// <summary>
/// copies this bitmap and trims out transparent pixels, returning the offset to the topleft pixel
/// </summary>
public BitmapBuffer Trim(out int xofs, out int yofs)
{
int minx = int.MaxValue;
int maxx = int.MinValue;
int miny = int.MaxValue;
int maxy = int.MinValue;
for (int y = 0; y < Height; y++)
{
for (int x = 0; x < Width; x++)
{
int pixel = GetPixel(x, y);
int a = (pixel >> 24) & 0xFF;
if (a != 0)
{
minx = Math.Min(minx, x);
maxx = Math.Max(maxx, x);
miny = Math.Min(miny, y);
maxy = Math.Max(maxy, y);
}
}
}
if (minx == int.MaxValue || maxx == int.MinValue || miny == int.MaxValue || minx == int.MinValue)
{
xofs = yofs = 0;
return(new BitmapBuffer(0, 0));
}
int w = maxx - minx + 1;
int h = maxy - miny + 1;
BitmapBuffer bbRet = new BitmapBuffer(w, h);
for (int y = 0; y < h; y++)
{
for (int x = 0; x < w; x++)
{
bbRet.SetPixel(x, y, GetPixel(x + minx, y + miny));
}
}
xofs = minx;
yofs = miny;
return(bbRet);
}
/// <summary>
/// copies this bitmap and trims out transparent pixels, returning the offset to the topleft pixel
/// </summary>
public BitmapBuffer Trim(out int xofs, out int yofs)
{
int minx = int.MaxValue;
int maxx = int.MinValue;
int miny = int.MaxValue;
int maxy = int.MinValue;
for (int y = 0; y < Height; y++)
for (int x = 0; x < Width; x++)
{
int pixel = GetPixel(x, y);
int a = (pixel >> 24) & 0xFF;
if (a != 0)
{
minx = Math.Min(minx, x);
maxx = Math.Max(maxx, x);
miny = Math.Min(miny, y);
maxy = Math.Max(maxy, y);
}
}
if (minx == int.MaxValue || maxx == int.MinValue || miny == int.MaxValue || minx == int.MinValue)
{
xofs = yofs = 0;
return new BitmapBuffer(0, 0);
}
int w = maxx - minx + 1;
int h = maxy - miny + 1;
BitmapBuffer bbRet = new BitmapBuffer(w, h);
for (int y = 0; y < h; y++)
for (int x = 0; x < w; x++)
{
bbRet.SetPixel(x, y, GetPixel(x + minx, y + miny));
}
xofs = minx;
yofs = miny;
return bbRet;
}
/// <summary>
/// Closes this instance for for further resource loading. Will result in a texture atlasing operation.
/// If the close operation is forever, then internal backup copies of resources will be freed, but it can never be reopened.
/// This function may take some time to run, as it is
/// </summary>
public unsafe void Close(bool forever = true)
{
AssertIsOpen(true);
IsOpened = false;
IsClosedForever = forever;
// first, cleanup old stuff
foreach (var tex in ManagedTextures)
{
tex.Dispose();
}
ManagedTextures.Clear();
// prepare input for atlas process and perform atlas
// add 2 extra pixels for padding on all sides
var atlasItems = new List <TexAtlas.RectItem>();
foreach (var kvp in ArtLooseTextureAssociation)
{
atlasItems.Add(new TexAtlas.RectItem(kvp.Value.Width + 2, kvp.Value.Height + 2, kvp));
}
var results = TexAtlas.PackAtlas(atlasItems);
// this isn't supported yet:
if (results.Atlases.Count > 1)
{
throw new InvalidOperationException("Art files too big for atlas");
}
// prepare the output buffer
BitmapBuffer bmpResult = new BitmapBuffer(results.Atlases[0].Size);
//for each item, copy it into the output buffer and set the tex parameters on them
for (int i = 0; i < atlasItems.Count; i++)
{
var item = results.Atlases[0].Items[i];
var artAndBitmap = (KeyValuePair <Art, BitmapBuffer>)item.Item;
var art = artAndBitmap.Key;
var bitmap = artAndBitmap.Value;
int w = bitmap.Width;
int h = bitmap.Height;
int dx = item.X + 1;
int dy = item.Y + 1;
for (int y = 0; y < h; y++)
{
for (int x = 0; x < w; x++)
{
int pixel = bitmap.GetPixel(x, y);
bmpResult.SetPixel(x + dx, y + dy, pixel);
}
}
var myDestBitmap = bmpResult;
float myDestWidth = (float)myDestBitmap.Width;
float myDestHeight = (float)myDestBitmap.Height;
art.u0 = dx / myDestWidth;
art.v0 = dy / myDestHeight;
art.u1 = (dx + w) / myDestWidth;
art.v1 = (dy + h) / myDestHeight;
art.Width = w;
art.Height = h;
}
//if we're closed forever, then forget all the original bitmaps
if (forever)
{
foreach (var kvp in ArtLooseTextureAssociation)
{
kvp.Value.Dispose();
}
ArtLooseTextureAssociation.Clear();
}
//create a physical texture
var texture = Owner.LoadTexture(bmpResult);
ManagedTextures.Add(texture);
//oops, we couldn't do this earlier.
foreach (var art in ManagedArts)
{
art.BaseTexture = texture;
}
}
/// <summary>
/// Closes this instance for for further resource loading. Will result in a texture atlasing operation.
/// If the close operation is forever, then internal backup copies of resources will be freed, but it can never be reopened.
/// This function may take some time to run, as it is
/// </summary>
public unsafe void Close(bool forever = true)
{
AssertIsOpen(true);
IsOpened = false;
IsClosedForever = forever;
//first, cleanup old stuff
foreach (var tex in ManagedTextures)
tex.Dispose();
ManagedTextures.Clear();
//prepare input for atlas process and perform atlas
//add 2 extra pixels for padding on all sides
List<TexAtlas.RectItem> atlasItems = new List<TexAtlas.RectItem>();
foreach (var kvp in ArtLooseTextureAssociation)
atlasItems.Add(new TexAtlas.RectItem(kvp.Value.Width+2, kvp.Value.Height+2, kvp));
var results = TexAtlas.PackAtlas(atlasItems);
//this isnt supported yet:
if (results.Atlases.Count > 1)
throw new InvalidOperationException("Art files too big for atlas");
//prepare the output buffer
BitmapBuffer bmpResult = new BitmapBuffer(results.Atlases[0].Size);
//for each item, copy it into the output buffer and set the tex parameters on them
for (int i = 0; i < atlasItems.Count; i++)
{
var item = results.Atlases[0].Items[i];
var artAndBitmap = (KeyValuePair<Art, BitmapBuffer>)item.Item;
var art = artAndBitmap.Key;
var bitmap = artAndBitmap.Value;
int w = bitmap.Width;
int h = bitmap.Height;
int dx = item.X + 1;
int dy = item.Y + 1;
for (int y = 0; y < h; y++)
for (int x = 0; x < w; x++)
{
int pixel = bitmap.GetPixel(x, y);
bmpResult.SetPixel(x+dx,y+dy,pixel);
}
var myDestBitmap = bmpResult;
float myDestWidth = (float)myDestBitmap.Width;
float myDestHeight = (float)myDestBitmap.Height;
art.u0 = dx / myDestWidth;
art.v0 = dy / myDestHeight;
art.u1 = (dx + w) / myDestWidth;
art.v1 = (dy + h) / myDestHeight;
art.Width = w;
art.Height = h;
}
//if we're closed forever, then forget all the original bitmaps
if (forever)
{
foreach (var kvp in ArtLooseTextureAssociation)
kvp.Value.Dispose();
ArtLooseTextureAssociation.Clear();
}
//create a physical texture
var texture = Owner.LoadTexture(bmpResult);
ManagedTextures.Add(texture);
//oops, we couldn't do this earlier.
foreach (var art in ManagedArts)
art.BaseTexture = texture;
}
