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;
}