static void CalculColors(GifData gifData, int index)
{
Color[] previousFrame = gifData.previousFrame;
if (previousFrame == null)
{
previousFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
}
Color[] currentFrame = gifData.currentFrame;
if (currentFrame == null)
{
currentFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
}
Color[] transparentFrame = gifData.transparentFrame;
if (transparentFrame == null)
{
transparentFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
}
GifGraphicsControlExtension graphicsControlExt = gifData.graphicsControlExtensions[index];
GifImageDescriptor imageDescriptor = graphicsControlExt.imageDescriptor;
GifImageData imageData = imageDescriptor.imageData;
int top = imageDescriptor.imageTop;
int left = imageDescriptor.imageLeft;
int disposalMethod = graphicsControlExt.disposalMethod;
int transparencyIndex = graphicsControlExt.transparentColorFlag ? graphicsControlExt.transparentColorIndex : -1;
Color[] colorTabel = imageData.imageDescriptor.localColorTableFlag ? imageData.imageDescriptor.localColorTable : gifData.globalColorTable;
for (int j = 0; j < imageDescriptor.imageWidth; j++)
{
for (int k = 0; k < imageDescriptor.imageHeight; k++)
{
int x = left + j;
int y = (gifData.canvasHeight - 1) - (top + k);
int colorIndex = imageData.colorIndices[j + k * imageDescriptor.imageWidth];
int pixelOffset = x + y * gifData.canvasWidth;
if (colorIndex != transparencyIndex)
{
currentFrame[pixelOffset] = colorTabel[colorIndex];
}
}
}
currentFrame.CopyTo(previousFrame, 0);
if (disposalMethod == 0 || disposalMethod == 2)
{
currentFrame = new Color[currentFrame.Length];
imageData.colors = currentFrame;
}
else
{
imageData.colors = new Color[currentFrame.Length];
currentFrame.CopyTo(imageData.colors, 0);
}
gifData.previousFrame = previousFrame;
gifData.currentFrame = currentFrame;
gifData.transparentFrame = transparentFrame;
}
private void WriteGraphicalControlExtension(ImageBase image, EndianBinaryWriter writer,
int transparencyIndex)
{
// TODO: Check transparency logic.
bool hasTransparent = transparencyIndex > -1;
DisposalMethod disposalMethod = hasTransparent ? DisposalMethod.RestoreToBackground : DisposalMethod.Unspecified;
GifGraphicsControlExtension extension = new GifGraphicsControlExtension()
{
DisposalMethod = disposalMethod,
TransparencyFlag = hasTransparent,
TransparencyIndex = transparencyIndex,
DelayTime = image.FrameDelay
};
// Reduce the number of writes.
byte[] intro =
{
GifConstants.extensionIntroducer, GifConstants.graphicControlLabel, 4 // size
};
writer.Write(intro);
PackedField field = new PackedField();
field.SetBits(3, 3, (int)extension.DisposalMethod); // 1-3 : Reserved, 4-6 : Disposal
// TODO: Allow this as an option.
field.SetBit(6, false); // 7 : User input - 0 = none
field.SetBit(7, extension.TransparencyFlag); // 8: Has transparent.
writer.Write(field.Byte);
writer.Write((ushort)extension.DelayTime);
writer.Write((byte)(extension.TransparencyIndex == -1 ? 255 : extension.TransparencyIndex));
writer.Write(GifConstants.terminator);
}
private GifGraphicsControlExtension readGraphicsControlExtension(GifData gifData, byte[] bytes, int offset)
{
GifGraphicsControlExtension gce = new GifGraphicsControlExtension(gifData);
gce.disposalMethod = BitHelper.getIntFromPackedByte(bytes[offset + 3], 3, 6);
gce.transparentColorFlag = BitHelper.getIntFromPackedByte(bytes[offset + 3], 7, 8) == 1;
gce.delayTime = BitHelper.getInt16FromBytes(bytes, offset + 4);
gce.transparentColorIndex = bytes[offset + 6];
return(gce);
}
private void ReadGraphicalControlExtension()
{
byte[] buffer = new byte[6];
currentStream.Read(buffer, 0, buffer.Length);
byte packed = buffer[1];
graphicsControlExtension = new GifGraphicsControlExtension {
DelayTime = BitConverter.ToInt16(buffer, 2),
TransparencyIndex = buffer[4],
TransparencyFlag = (packed & 0x01) == 1,
DisposalMethod = (DisposalMethod)((packed & 0x1C) >> 2)
};
}
static void CalculColors(GifData gifData)
{
Color[] previousFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
Color[] currentFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
Color[] transparentFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
// Create sprites
for (int i = 0; i < gifData.graphicsControlExtensions.Count; i++)
{
GifGraphicsControlExtension graphicsControlExt = gifData.graphicsControlExtensions[i];
GifImageDescriptor imageDescriptor = graphicsControlExt.imageDescriptor;
GifImageData imageData = imageDescriptor.imageData;
int top = imageDescriptor.imageTop;
int left = imageDescriptor.imageLeft;
int disposalMethod = graphicsControlExt.disposalMethod;
int transparencyIndex = graphicsControlExt.transparentColorFlag ? graphicsControlExt.transparentColorIndex : -1;
Color[] colorTabel = imageData.imageDescriptor.localColorTableFlag ? imageData.imageDescriptor.localColorTable : gifData.globalColorTable;
for (int j = 0; j < imageDescriptor.imageWidth; j++)
{
for (int k = 0; k < imageDescriptor.imageHeight; k++)
{
int x = left + j;
int y = (gifData.canvasHeight - 1) - (top + k);
int colorIndex = imageData.colorIndices[j + k * imageDescriptor.imageWidth];
int pixelOffset = x + y * gifData.canvasWidth;
if (colorIndex != transparencyIndex)
{
currentFrame[pixelOffset] = colorTabel[colorIndex];//imageData.getColor(colorIndex);
}
}
}
// Set texture pixels and create sprite
// Store current frame as previous before continuing, and reset current frame
currentFrame.CopyTo(previousFrame, 0);
if (disposalMethod == 0 || disposalMethod == 2)
{
currentFrame = new Color[currentFrame.Length];
imageData.colors = currentFrame;
}
else
{
imageData.colors = new Color[currentFrame.Length];
currentFrame.CopyTo(imageData.colors, 0);
}
}
}
static List <Texture2D> CreateAnimator(GifData gifData)
{
List <Texture2D> sprites = new List <Texture2D>();
// Create sprites
for (int i = 0; i < gifData.graphicsControlExtensions.Count; i++)
{
GifGraphicsControlExtension graphicsControlExt = gifData.graphicsControlExtensions[i];
GifImageDescriptor imageDescriptor = graphicsControlExt.imageDescriptor;
GifImageData imageData = imageDescriptor.imageData;
Texture2D texture = new Texture2D(gifData.canvasWidth, gifData.canvasHeight);
// Set texture pixels and create sprite
texture.SetPixels(imageData.colors);
texture.Apply();
texture.filterMode = FilterMode.Point;
sprites.Add(texture);
}
return(sprites);
}
public void CreateNextTexture()
{
if (textures == null)
{
textures = new List <Texture2D>();
}
int c = decodeCount;
for (int i = createCount; i < c; i++)
{
GifGraphicsControlExtension graphicsControlExt = graphicsControlExtensions[i];
GifImageDescriptor imageDescriptor = graphicsControlExt.imageDescriptor;
GifImageData imageData = imageDescriptor.imageData;
Texture2D texture = new Texture2D(canvasWidth, canvasHeight);
texture.SetPixels(imageData.colors);
texture.Apply();
texture.filterMode = FilterMode.Point;
textures.Add(texture);
}
createCount = c;
}
private void createAnimator(GifData gifData)
{
List <Sprite> sprites = new List <Sprite>();
GifAnimatorScript animatorScript = gameObject.AddComponent <GifAnimatorScript>();
Color[] previousFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
Color[] currentFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
Color[] transparentFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
// Create sprites
for (int i = 0; i < gifData.graphicsControlExtensions.Count; i++)
{
GifGraphicsControlExtension graphicsControlExt = gifData.graphicsControlExtensions[i];
GifImageDescriptor imageDescriptor = graphicsControlExt.imageDescriptor;
GifImageData imageData = imageDescriptor.imageData;
int top = imageDescriptor.imageTop;
int left = imageDescriptor.imageLeft;
int disposalMethod = graphicsControlExt.disposalMethod;
Texture2D texture = new Texture2D(gifData.canvasWidth, gifData.canvasHeight);
int transparencyIndex = graphicsControlExt.transparentColorFlag ? graphicsControlExt.transparentColorIndex : -1;
// Determine base pixels
if (i == 0)
{
texture.SetPixels(transparentFrame);
}
else
{
if (disposalMethod == 1)
{
texture.SetPixels(previousFrame);
}
else if (disposalMethod == 2)
{
texture.SetPixels(transparentFrame);
}
else if (disposalMethod == 3)
{
throw new NotImplementedException("Disposal method 3 is not implemented.");
}
}
// Set pixels from image data
for (int j = 0; j < imageDescriptor.imageWidth; j++)
{
for (int k = 0; k < imageDescriptor.imageHeight; k++)
{
int x = left + j;
int y = (gifData.canvasHeight - 1) - (top + k);
int colorIndex = imageData.colorIndices[j + k * imageDescriptor.imageWidth];
int pixelOffset = x + y * gifData.canvasWidth;
if (colorIndex != transparencyIndex)
{
GifColor gifColor = imageData.getColor(colorIndex);
currentFrame[pixelOffset] = new Color(gifColor.r / 255f, gifColor.g / 255f, gifColor.b / 255f);
}
}
}
// Set texture pixels and create sprite
texture.SetPixels(currentFrame);
texture.Apply();
texture.filterMode = FilterMode.Point;
sprites.Add(Sprite.Create(texture, new Rect(0f, 0f, gifData.canvasWidth, gifData.canvasHeight), new Vector2(1f, 1f)));
// Store current frame as previous before continuing, and reset current frame
currentFrame.CopyTo(previousFrame, 0);
if (disposalMethod == 0 || disposalMethod == 2)
{
currentFrame = new Color[currentFrame.Length];
}
}
// Setup animator script
animatorScript.sprites = sprites;
}
private void createAnimator(GifData gifData)
{
List <Sprite> sprites = new List <Sprite>();
GifAnimatorScript animatorScript = gameObject.AddComponent <GifAnimatorScript>();
Color[] previousFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
Color[] currentFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
Color[] transparentFrame = new Color[gifData.canvasWidth * gifData.canvasHeight];
// Create sprites
for (int i = 0; i < gifData.graphicsControlExtensions.Count; i++)
{
GifGraphicsControlExtension graphicsControlExt = gifData.graphicsControlExtensions[i];
GifImageDescriptor imageDescriptor = graphicsControlExt.imageDescriptor;
GifImageData imageData = imageDescriptor.imageData;
int top = imageDescriptor.imageTop;
int left = imageDescriptor.imageLeft;
int disposalMethod = graphicsControlExt.disposalMethod;
Texture2D texture = new Texture2D(gifData.canvasWidth, gifData.canvasHeight);
int transparencyIndex = graphicsControlExt.transparentColorFlag ? graphicsControlExt.transparentColorIndex : -1;
// Determine base pixels
if (i == 0)
{
texture.SetPixels(transparentFrame);
}
else
{
if (disposalMethod == 1)
{
texture.SetPixels(previousFrame);
}
else if (disposalMethod == 2)
{
texture.SetPixels(transparentFrame);
}
else if (disposalMethod == 3)
{
throw new NotImplementedException("Disposal method 3 is not implemented.");
}
}
// Set pixels from image data
for (int j = 0; j < imageDescriptor.imageWidth; j++)
{
for (int k = 0; k < imageDescriptor.imageHeight; k++)
{
int x = left + j;
int y = (gifData.canvasHeight - 1) - (top + k);
int colorIndex = imageData.colorIndices[j + k * imageDescriptor.imageWidth];
int pixelOffset = x + y * gifData.canvasWidth;
if (colorIndex != transparencyIndex)
{
GifColor gifColor = imageData.getColor(colorIndex);
currentFrame[pixelOffset] = new Color(gifColor.r / 255f, gifColor.g / 255f, gifColor.b / 255f);
}
}
}
//float bgMax = 50f / 255;
//var transparent = currentFrame.Where(p => p.a == 0);
//var bgMeanSum = currentFrame.Aggregate(new float[8], (curSum, color) =>
//{
// curSum[4] += color.a;
// ++curSum[5];
// if (color.a > 0)
// {
// curSum[6] += color.a;
// ++curSum[7];
// }
// if (color.r >= bgMax || color.g >= bgMax || color.b >= bgMax)
// return curSum; // We are interested on dark colors
// curSum[0] += color.r;
// curSum[1] += color.g;
// curSum[2] += color.b;
// ++curSum[3];
// return curSum;
//});
//var bgMean = new Color32(
// (byte)(bgMeanSum[0] * 255 / bgMeanSum[3]),
// (byte)(bgMeanSum[1] * 255 / bgMeanSum[3]),
// (byte)(bgMeanSum[2] * 255 / bgMeanSum[3]),
// (byte)(bgMeanSum[4] * 255 / bgMeanSum[5]));
//Debug.Log(
// $"Frame {i} has transparent colors?: {transparent.Any()} || Count: {transparent.Count()} || Background: {bgMean}" +
// Environment.NewLine +
// $"Solid transparency mean (must be 255): {(byte)(bgMeanSum[6] * 255 / bgMeanSum[7])}");
// Set texture pixels and create sprite
texture.SetPixels(currentFrame);
texture.Apply();
texture.filterMode = FilterMode.Point;
sprites.Add(Sprite.Create(texture, new Rect(0f, 0f, gifData.canvasWidth, gifData.canvasHeight), new Vector2(1f, 1f)));
// Store current frame as previous before continuing, and reset current frame
currentFrame.CopyTo(previousFrame, 0);
if (disposalMethod == 0 || disposalMethod == 2)
{
currentFrame = new Color[currentFrame.Length];
}
}
// Setup animator script
animatorScript.sprites = sprites;
}
public void Set(GifGraphicsControlExtension.GraphicsControlExtension g, GifImageDescriptor.ImageDescriptor id, GifImageData.ImageData d)
{
GCE = g;
desciptor = id;
data = d;
}
private void ReadGraphicalControlExtension()
{
byte[] buffer = new byte[6];
_stream.Read(buffer, 0, buffer.Length);
byte packed = buffer[1];
_graphicsControl = new GifGraphicsControlExtension();
_graphicsControl.DelayTime = BitConverter.ToInt16(buffer, 2);
_graphicsControl.TransparencyIndex = buffer[4];
_graphicsControl.TransparencyFlag = (packed & 0x01) == 1;
_graphicsControl.DisposalMethod = (DisposalMethod)((packed & 0x1C) >> 2);
}