public static Data2D <byte> ReadData2DBytes(this BinaryReader br)
{
Rectangle bounds = br.ReadRectangle();
int area = bounds.Width * bounds.Height;
Data2D <byte> result = new Data2D <byte>(area != 0 ? br.ReadBytes(area) : null, bounds);
return(result);
}
public void Optimise()
{
Rectangle extents = heightmapData.FindTrimBounds(DefaultHeight);
if (heightmapData.Bounds != extents)
{
heightmapData = heightmapData.CopyWithNewBounds(extents, DefaultHeight);
}
}
public static void WriteData2DBytes(this BinaryWriter bw, Data2D <byte> data)
{
bw.Write(data.Bounds);
int area = data.Bounds.Width * data.Bounds.Height;
if (area != 0)
{
Debug.Assert(data.Data.Length == area);
bw.Write(data.Data);
}
}
/// <summary>Create a sprite from world-oriented color data</summary>
public static Sprite MakeSpriteFromWorld(this Data2D <Color> data, GraphicsDevice device)
{
Debug.Assert(data.Width > 0 && data.Height > 0);
var clientOrientedData = data.CopyFlipY();
Texture2D texture = new Texture2D(device, clientOrientedData.Width, clientOrientedData.Height);
texture.SetData(clientOrientedData.Data);
return(new Sprite(texture, clientOrientedData.OriginInData));
}
public static Data2D <Color> CreateColorData(this MaskData mask, Color color)
{
var data = new Data2D <Color>(mask.Bounds);
for (var y = data.StartY; y < data.EndY; y++)
{
for (var x = data.StartX; x < data.EndX; x++)
{
data[x, y] = mask[x, y] ? color : Color.Transparent;
}
}
return(data);
}
/// <summary>Set an area to a flat height given a mask of the base of the object</summary>
public void SetFromFlatBaseMask(MaskData maskData, byte height)
{
// Ensure that there's enough room in the heightmap to contain mask...
heightmapData = heightmapData.LazyCopyExpandToContain(maskData.Bounds, DefaultHeight);
for (int y = maskData.StartY; y < maskData.EndY; y++)
{
for (int x = maskData.StartX; x < maskData.EndX; x++)
{
if (maskData[x, y])
{
heightmapData[x, y] = height;
}
}
}
}
/// <summary>Set from a 1px deep alpha mask (such as for a railing)</summary>
public void SetFromRailingMask(MaskData maskData)
{
heightmapData = heightmapData.LazyCopyExpandToContain(new Rectangle(maskData.OffsetX, 0, maskData.Width, 1), DefaultHeight);
for (int x = maskData.StartX; x < maskData.EndX; x++) // For each column in the image
{
for (int y = maskData.EndY - 1; y >= maskData.StartY; y--) // Search top-to-bottom
{
if (maskData[x, y])
{
heightmapData[x, 0] = (byte)y;
goto nextColumn;
}
}
nextColumn:
;
}
}
/// <summary>Create a sprite from client-oriented color data</summary>
public static Sprite MakeSprite(this Data2D <Color> data, GraphicsDevice device)
{
Debug.Assert(data.Width > 0 && data.Height > 0);
Texture2D texture;
if (device != null) // <- allows loading headless
{
texture = new Texture2D(device, data.Width, data.Height);
texture.SetData(data.Data);
}
else
{
texture = null;
}
return(new Sprite(texture, data.OriginInData));
}
/// <summary>Convert color data to a trimmed 1-bit mask</summary>
public static MaskData CreateMask(this Data2D <Color> data, Color color, bool inverse = false)
{
Rectangle trimBounds = data.FindTrimBounds(color, inverse);
// TODO: Avoid this copy...
Data2D <Color> trimData = data.CopyWithNewBounds(trimBounds);
MaskData mask = new MaskData(trimData.Bounds);
for (int y = trimData.StartY; y < trimData.EndY; y++)
{
for (int x = trimData.StartX; x < trimData.EndX; x++)
{
mask[x, y] = ((trimData[x, y] == color) != inverse);
}
}
return(mask);
}
public Heightmap(AnimationDeserializeContext context)
{
DefaultHeight = context.br.ReadByte();
OneWay = context.br.ReadBoolean();
OneWayThickness = context.br.ReadByte();
if (context.br.ReadBoolean())
{
Rectangle bounds = context.br.ReadRectangle();
byte[] data = context.br.ReadBytes(bounds.Width * bounds.Height);
heightmapData = new Data2D <byte>(data, bounds);
}
else
{
heightmapData = default(Data2D <byte>);
}
instructions = HeightmapInstructionExtensions.Deserialize(context);
}
/// <param name="slope">Number of pixels to travel backwards before traveling in the oblique direction</param>
public void SetFromFrontEdge(MaskData maskData, int frontEdgeDepth, int depth, Oblique obliqueDirection, int slope, int offset)
{
Debug.Assert(depth > 0);
Debug.Assert(slope > 0);
// How far do we travel on the X axis as we go backwards?
int pixelsTraveledSideways = ((depth + slope - 1) / slope - 1) * (int)obliqueDirection;
int outputStartX = Math.Min(maskData.StartX, maskData.StartX + pixelsTraveledSideways);
int outputEndX = Math.Max(maskData.EndX, maskData.EndX + pixelsTraveledSideways);
// Ensure that there's enough room in the heightmap to contain the maximum extents of the processed mask...
Rectangle outputPotentialBounds = new Rectangle(outputStartX, frontEdgeDepth, outputEndX - outputStartX, depth);
heightmapData = heightmapData.LazyCopyExpandToContain(outputPotentialBounds, DefaultHeight);
// Read the mask upwards to find the "lip" of the mask surface
for (int x = maskData.StartX; x < maskData.EndX; x++) // For each column in the image
{
for (int y = maskData.StartY; y < maskData.EndY; y++) // Search from bottom-to-top
{
if (maskData[x, y])
{
// Found the lip at a given Y height, copy it backwards at the given pitch
for (int d = 0; d < depth; d++)
{
int zz = frontEdgeDepth + d;
int xx = x + (d / slope) * (int)obliqueDirection;
heightmapData[xx, zz] = (byte)(y - frontEdgeDepth + offset);
}
goto nextColumn;
}
}
nextColumn:
;
}
}
/// <summary>Perform a transform of the data around its origin, using the given transform matrix</summary>
public Data2D <T> Transform(IntMatrix2 matrix)
{
// Local corners (inclusive)
Point TL = new Point(OffsetX, OffsetY);
Point TR = new Point(OffsetX + Width - 1, OffsetY);
Point BL = new Point(OffsetX, OffsetY + Height - 1);
Point BR = new Point(OffsetX + Width - 1, OffsetY + Height - 1);
// Transformed corners:
Point cornerA = matrix.Transform(TL);
Point cornerB = matrix.Transform(TR);
Point cornerC = matrix.Transform(BL);
Point cornerD = matrix.Transform(BR);
// Convert to rectangle:
int minX = Math.Min(Math.Min(cornerA.X, cornerB.X), Math.Min(cornerC.X, cornerD.X));
int minY = Math.Min(Math.Min(cornerA.Y, cornerB.Y), Math.Min(cornerC.Y, cornerD.Y));
int maxX = Math.Max(Math.Max(cornerA.X, cornerB.X), Math.Max(cornerC.X, cornerD.X));
int maxY = Math.Max(Math.Max(cornerA.Y, cornerB.Y), Math.Max(cornerC.Y, cornerD.Y));
Rectangle outputBounds = new Rectangle(minX, minY, maxX - minX + 1, maxY - minY + 1);
// Now transform the data:
Data2D <T> transformed = new Data2D <T>(outputBounds);
for (int y = StartY; y < EndY; y++)
{
for (int x = StartX; x < EndX; x++)
{
// INLINED: IntMatrix2.Transform
int outX = x * matrix.xToX + y * matrix.yToX;
int outY = x * matrix.xToY + y * matrix.yToY;
// INLINED: indexer operator (x2)
transformed.Data[(outX - transformed.OffsetX) + (outY - transformed.OffsetY) * transformed.Width]
= Data[(x - OffsetX) + (y - OffsetY) * Width];
}
}
return(transformed);
}
// TODO: This is disabled at the moment, because it will probably make authoring difficult...
// (Also it's less of a big deal than physics heightmaps)
public void OptimiseForShadowReceiver()
{
if (heightmapData.Data == null)
{
return; // <- nothing to optimise
}
Debug.Assert(heightmapData.Data.Length > 0); // <- Data2D should be enforcing this condition
// See if we have a heightmap filled with just a single value:
byte startValue = heightmapData.Data[0];
for (int i = 0; i < heightmapData.Data.Length; i++)
{
if (heightmapData.Data[i] != startValue)
{
goto hasMoreThanOneValue;
}
}
// Convert to fixed-height:
DefaultHeight = startValue;
heightmapData = new Data2D <byte>();
return;
hasMoreThanOneValue:
Rectangle extents = heightmapData.FindTrimBoundsForShadowReceiver();
// Assert that we're shrinking (because if we expand, then we're adding in wrong data, due to DefaultHeight)
Debug.Assert(extents.Left >= heightmapData.Bounds.Left);
Debug.Assert(extents.Right <= heightmapData.Bounds.Right);
Debug.Assert(extents.Top >= heightmapData.Bounds.Top);
Debug.Assert(extents.Bottom <= heightmapData.Bounds.Bottom);
if (heightmapData.Bounds != extents)
{
heightmapData = heightmapData.CopyWithNewBounds(extents, DefaultHeight);
}
}
/// <summary>Set heights from a top-surface mask where the front edge is at a particular depth</summary>
/// <param name="maskData">The 1-bit mask representing the top surface</param>
/// <param name="frontEdgeDepth">The depth of the front edge of pixels in the mask</param>
/// <param name="perspective">Oblique direction that the mask projects backwards towards</param>
public void SetFromObliqueTopMask(MaskData maskData, int frontEdgeDepth, Oblique oblique)
{
// Ensure that there's enough room in the heightmap to contain the maximum extents of the mask
Rectangle outputPotentialBounds = maskData.Bounds;
outputPotentialBounds.Y = frontEdgeDepth; // The usable Z range = [frontEdgeDepth, frontEdgeDepth + Height)
heightmapData = heightmapData.LazyCopyExpandToContain(outputPotentialBounds, DefaultHeight);
// Note: Y axis seeks from the top downwards (from back to front)
for (int y = maskData.EndY - 1; y >= maskData.StartY; y--)
{
for (int x = maskData.StartX; x < maskData.EndX; x++)
{
if (maskData[x, y])
{
int height = GetHeightByWalkingObliqueForward(maskData, frontEdgeDepth, oblique, x, y);
int z = y - height;
heightmapData[x, z] = (byte)height; // (If height overflows... at least it will be obvious)
}
}
}
}
public void ClearToHeight(byte height)
{
DefaultHeight = height;
heightmapData = default(Data2D <byte>);
}
public static Rectangle FindTrimBounds(this Data2D <byte> data, byte defaultValue)
{
if (data.Data == null)
{
return(Rectangle.Empty);
}
// NOTE: Bounds are found on non-offset data, and offset is applied at the end
int top = 0;
// Search downwards to find top row with a matching pixel...
for (; top < data.Height; top++)
{
for (int x = 0; x < data.Width; x++)
{
if (data.Data[x + top * data.Width] != defaultValue)
{
goto foundTop;
}
}
}
return(Rectangle.Empty); // No matching data found
foundTop:
int bottom = data.Height - 1, left = 0, right = data.Width - 1;
// Search upwards to find bottom row with a matching pixel...
for (; bottom > top; bottom--) // <- (exit if we reach the 'top' row: 1px tall)
{
for (int x = 0; x < data.Width; x++)
{
if (data.Data[x + bottom * data.Width] != defaultValue)
{
goto foundBottom;
}
}
}
foundBottom:
// Search left to find left column with a matching pixel...
for (; left < data.Width; left++)
{
for (int y = top; y <= bottom; y++)
{
if (data.Data[left + y * data.Width] != defaultValue)
{
goto foundLeft;
}
}
}
foundLeft:
// Search right to find right column with a matching pixel...
for (; right > left; right--) // <- (exit if we reach the 'left' column: 1px wide)
{
for (int y = top; y <= bottom; y++)
{
if (data.Data[right + y * data.Width] != defaultValue)
{
goto foundRight;
}
}
}
foundRight:
return(new Rectangle(left + data.OffsetX, top + data.OffsetY, right - left + 1, bottom - top + 1));
}
public void SetFromObliqueSide(MaskData maskData, Oblique obliqueDirection, int offset)
{
// Straight and Right use the same input direction (because Straight input does not make sense, but Straight output is ok)
int inputReadDirection = 1;
int x = maskData.StartX;
if (obliqueDirection == Oblique.Left)
{
inputReadDirection = -1;
x = maskData.EndX - 1;
}
int y;
while (x >= maskData.StartX && x < maskData.EndX)
{
for (y = maskData.StartY; y < maskData.EndY; y++) // read bottom-to-top
{
if (maskData[x, y])
{
goto foundStartPosition;
}
}
x += inputReadDirection;
}
// No data found!
return;
foundStartPosition:
// Ensure that there's enough room in the heightmap to contain the maximum extents of the processed mask...
{
int left, right;
if (inputReadDirection == 1)
{
left = x;
right = maskData.EndX - 1;
}
else // reading right-to-left
{
left = maskData.StartX;
right = x;
}
// Account for offset:
left += Math.Min(offset, 0);
right += Math.Max(offset, 0);
int front = y;
int back = front + (right - left); // can move back one pixel for each column of input
Rectangle outputPotentialBounds = new Rectangle(left, front, (right - left) + 1, (back - front) + 1);
heightmapData = heightmapData.LazyCopyExpandToContain(outputPotentialBounds, DefaultHeight);
}
// Convert mask to heightmap:
int writeX = x;
int writeZ = y;
int baseY = y;
while (x >= maskData.StartX && x < maskData.EndX) // For each column to end of image
{
y = baseY; // Count pixels from base upwards
while (y < maskData.EndY && maskData[x, y])
{
y++;
}
int height = y - baseY;
if (height > 0)
{
int i = 0;
do
{
heightmapData[writeX + i * Math.Sign(offset), writeZ] = (byte)Math.Min(byte.MaxValue, height);
i++;
} while(i < Math.Abs(offset));
}
// Move input:
x += inputReadDirection;
baseY++;
// Move output:
writeX += (int)obliqueDirection;
writeZ++;
}
}
// TODO: If we can pass in a query direction, we can super-optimise at the top and bottom sides
public static Rectangle FindTrimBoundsForShadowReceiver(this Data2D <byte> data)
{
if (data.Data == null)
{
return(Rectangle.Empty);
}
// NOTE: Bounds are found on non-offset data, and offset is applied at the end
// Top must all be the same value (due to angular queries)
byte topValue = data.Data[0];
int top = 0;
for (; top < data.Height; top++)
{
for (int x = 0; x < data.Width; x++)
{
if (data.Data[x + top * data.Width] != topValue)
{
goto foundTop;
}
}
}
foundTop:
int bottom = data.Height - 1, left = 0, right = data.Width - 1;
// Bottom must all be the same value (due to angular queries)
byte bottomValue = data.Data[bottom * data.Width];
for (; bottom > top; bottom--) // <- (exit if we reach the 'top' row: 1px tall)
{
for (int x = 0; x < data.Width; x++)
{
if (data.Data[x + bottom * data.Width] != bottomValue)
{
goto foundBottom;
}
}
}
foundBottom:
// Left queries inwards, so columns must match
for (; left + 1 < data.Width; left++)
{
for (int y = top; y <= bottom; y++)
{
if (data.Data[left + 1 + y * data.Width] != data.Data[left + y * data.Width])
{
goto foundLeft;
}
}
}
foundLeft:
// Right queries inwards, so columns must match
for (; right - 1 > left; right--) // <- (exit if we reach the 'left' column: 1px wide)
{
for (int y = top; y <= bottom; y++)
{
if (data.Data[right - 1 + y * data.Width] != data.Data[right + y * data.Width])
{
goto foundRight;
}
}
}
foundRight:
return(new Rectangle(left + data.OffsetX, top + data.OffsetY, right - left + 1, bottom - top + 1));
}
// TODO: Factor this out such that frames can be appended on-the-fly (for capturing "animated screenshots").
//
// May want to do threading (outside this class). Could thread the following:
// - Pulling GPU surfaces (want to return surfaces quikcly)
// - GIF encoding (maybe fast enough to combine, rather than take buffer re-cache hit and thread costs)
// - File I/O (want to avoid blocking useful work while writing to file, and built-in async allocates, uses a thread pool anyway??)
// Debatable about what, if anything, to combine.
public void WriteAnimation(Animation animation)
{
if (animation == null)
{
throw new ArgumentNullException("animation");
}
if (animation.FrameCount == 0)
{
return;
}
if (stream == null)
{
throw new InvalidOperationException("No stream set");
}
Rectangle animationBounds = animation.GetSoftRenderBounds(true);
Position accumulatedGameplayMotion = Position.Zero;
bool animated = animation.FrameCount > 1;
// Preconditions:
if (animationBounds.Width > ushort.MaxValue || animationBounds.Height > ushort.MaxValue)
{
return;
}
bool transparency = true;
// GIF: Header
{
WriteBuffer(gifHeader);
}
// GIF: Logical Screen Descriptor
{
WriteUShort((ushort)animationBounds.Width);
WriteUShort((ushort)animationBounds.Height);
byte packed = 0;
packed |= 1 << 7; // Global colour table present
packed |= 7 << 4; // Bits-per-channel minus 1, in source data
packed |= 0 << 3; // Is GCT priority-sorted?
packed |= 7 << 0; // Global colour table size = 2^(N+1)
WriteByte(packed);
WriteByte(0); // Background colour index into GCT (or 0 if not present)
WriteByte(0); // Pixel aspect ratio, or 0 for "not-specified"
}
// GIF: Global Color Table
// TODO: Consider using pre-built NES palette? (Especially for game export)
// TODO: Add support for local color tables
// Reserve and clear space in output buffer:
const int colorTableBytes = 256 * 3; // 256 RGB Colors
int gctStart = bufferPosition;
EnsureBufferSpace(colorTableBytes);
bufferPosition += colorTableBytes;
Array.Clear(buffer, gctStart, colorTableBytes);
int gctCount = 1; // <- first value is always pure black, and transparent if transparency is enabled
// GIF: NETSCAPE2.0 Application Extension Block
if (animated)
{
WriteBuffer(netscapeBlock);
}
foreach (var frame in animation.Frames)
{
var data = frame.SoftRender();
// HACK: If the image has zero size (blank, cropped to nothing), replace it with 1px of transparency
// (Because I'm not fiddling around trying to figure out how to encode a zero-sized frame, or how compatible that is, right now -AR)
if (data.Width == 0 || data.Height == 0)
{
data = new Data2D <Color>(animationBounds.X, animationBounds.Y, 1, 1);
}
accumulatedGameplayMotion += frame.positionDelta;
Point motion = accumulatedGameplayMotion.ToWorldZero.FlipY(); // Convert to texture space
data.OffsetX += motion.X;
data.OffsetY += motion.Y;
int delayTime = (frame.delay * 100) / 60; // Convert ticks at 60FPS to ticks at 100FPS (the GIF standard)
// NOTE: Browsers do retarded things with timings of 0 or 1. Some even do stupid things with 2-5.
// See http://nullsleep.tumblr.com/post/16524517190/animated-gif-minimum-frame-delay-browser for details
delayTime = System.Math.Max(2, System.Math.Min(delayTime, ushort.MaxValue));
// GIF: Graphic Control Extension
{
WriteByte(0x21); // extension block
WriteByte(0xF9); // graphics control label
WriteByte(0x04); // block size in bytes (fixed)
byte packed = 0;
packed |= (byte)((animated ? 2u : 0u) << 2); // Disposal method (0 = none specified, 1 = do not clear, 2 = clear to BG)
packed |= 0 << 1; // User input flag
packed |= (byte)((transparency ? 1u : 0) << 0); // Transparent colour flag
WriteByte(packed);
WriteUShort((ushort)(animated ? delayTime : 0)); // Delay time
WriteByte(0); // Transparent colour index // TODO: Put this outside the table, so that non-transparent images don't have fixed black entry in palette.
WriteByte(0); // Block terminator
}
// GIF: Image descriptor
{
WriteByte(0x2C); // Image separator
WriteUShort((ushort)(data.OffsetX - animationBounds.X)); // Image left
WriteUShort((ushort)(data.OffsetY - animationBounds.Y)); // Image top
WriteUShort((ushort)data.Width); // Image width
WriteUShort((ushort)data.Height); // Image height
byte packed = 0;
packed |= 0 << 7; // Local colour table
packed |= 0 << 6; // Interlace
packed |= 0 << 5; // Is LCT priority sorted?
packed |= 0 << 0; // Local colour table size = 2^(N+1)
WriteByte(packed);
// NOTE: Local colour table would folow if specified
}
// GIF: Image Data (with LZW compression)
{
WriteByte(8); // LZW minimum code size (hard-coding for 256-colour images for now)
WriteByte(0); // Placeholder for chunk size
PendingBitsAndAndChunks pending = new PendingBitsAndAndChunks();
// Code table is a series of unbalanced binary trees of available suffixes, one for each prefix
LZWTableEntry[] codeTable;
ushort[] treeRoots;
if (codeTableStorage == null)
{
codeTable = codeTableStorage = new LZWTableEntry[4096 - codeStart]; // maximum 12-bit codes
treeRoots = treeRootsStorage = new ushort[4096];
}
else
{
codeTable = codeTableStorage;
treeRoots = treeRootsStorage;
Array.Clear(treeRoots, 0, treeRoots.Length);
}
int codeCount = 0; // <- number of used entries in the (stored) code table
int codeBitsUsed = 9;
// Always start with clear code:
WriteVariableBitsChunked(clearCode, codeBitsUsed, ref pending);
// Setup active prefix:
uint activePrefix = (uint)GetColorTableIndex(buffer, gctStart, ref gctCount, data.Data[0], transparency);
Debug.Assert(activePrefix < 256);
// Loop through remaining indicies:
int imageSize = data.Width * data.Height;
for (int i = 1; i < imageSize; i++)
{
uint activeSuffix = (uint)GetColorTableIndex(buffer, gctStart, ref gctCount, data.Data[i], transparency);
Debug.Assert(activeSuffix < 256);
uint lastTreePosition = 0; // <- sentinal value for the root
uint foundSuffix = 0;
// Search for matching entry:
{
uint treePosition = treeRoots[activePrefix];
while (treePosition != 0)
{
lastTreePosition = treePosition;
foundSuffix = codeTable[treePosition - codeStart].SuffixValue;
if (activeSuffix == foundSuffix)
{
// FOUND:
activePrefix = treePosition;
goto nextIndex;
}
else if (activeSuffix < foundSuffix)
{
treePosition = codeTable[treePosition - codeStart].LowerIndex;
}
else // activeSuffix > foundSuffix
{
treePosition = codeTable[treePosition - codeStart].HigherIndex;
}
}
}
// NOT FOUND:
// Write the code we do know about
WriteVariableBitsChunked(activePrefix, codeBitsUsed, ref pending);
// If we fill up the code table, reset it
if (codeCount == codeTable.Length)
{
WriteVariableBitsChunked(clearCode, codeBitsUsed, ref pending);
Array.Clear(treeRoots, 0, treeRoots.Length);
codeCount = 0;
codeBitsUsed = 9;
}
else // Add to the code table
{
// Insert into unbalanced binary tree (prefix index is implicit in the tree itself)
if (lastTreePosition == 0)
{
treeRoots[activePrefix] = (ushort)(codeStart + codeCount);
}
else if (activeSuffix < foundSuffix)
{
codeTable[lastTreePosition - codeStart].LowerIndex = (uint)(codeStart + codeCount);
}
else // activeSuffix > foundSuffix
{
codeTable[lastTreePosition - codeStart].HigherIndex = (uint)(codeStart + codeCount);
}
// If the new code is past the maximum representable at this code width, increase the code width
if ((codeStart + codeCount) == (1 << codeBitsUsed))
{
codeBitsUsed++; // NOTE: GIF does *not* do an early change of the code-width
}
// Fill table entry:
codeTable[codeCount++] = new LZWTableEntry(activeSuffix);
}
// Active prefix has been written, start searching from the suffix
activePrefix = activeSuffix;
nextIndex :;
}
WriteVariableBitsChunked(activePrefix, codeBitsUsed, ref pending);
WriteVariableBitsChunked(endCode, codeBitsUsed, ref pending);
FinishVariableBitsChunked(ref pending);
FinishChunked(ref pending);
}
}
// GIF: Trailer
WriteByte(0x3B);
// Finished creating gif data at this point, write it out
stream.Write(buffer, 0, bufferPosition);
bufferPosition = 0;
}
