void RenderLoop() {
renderer = MakeRenderer();
using (MemoryStream ms = new MemoryStream()) {
// loop terminates with the rest of the program (this is a background thread)
while (true) {
// wait (block) until a map is available for drawing
RenderTask task = inQueue.Take();
try {
// render the map
IsoCatResult result = renderer.Draw(task.Map);
task.Map = null;
// crop image (if needed)
Image image;
if (p.Uncropped) {
image = result.Bitmap;
} else {
image = result.Bitmap.Clone(result.CropRectangle, result.Bitmap.PixelFormat);
result.Bitmap.Dispose();
}
// encode image
if (p.ExportFormat.Equals(ImageFormat.Jpeg)) {
EncoderParameters encoderParams = new EncoderParameters();
encoderParams.Param[0] = new EncoderParameter(Encoder.Quality, p.JpegQuality);
image.Save(ms, p.ImageEncoder, encoderParams);
} else if (p.ExportFormat.Equals(ImageFormat.Gif)) {
OctreeQuantizer q = new OctreeQuantizer(255, 8);
image = q.Quantize(image);
image.Save(ms, p.ExportFormat);
} else {
image.Save(ms, p.ExportFormat);
}
image.Dispose();
// store result as a byte[]
task.Result = ms.ToArray();
} catch (Exception ex) {
task.Exception = ex;
}
// send stack to the results queue
outQueue.Add(task);
ms.SetLength(0);
}
}
}
IsoCat MakeRenderer() {
// create and configure the renderer
IsoCat newRenderer = new IsoCat {
SeeThroughLava = p.SeeThroughLava,
SeeThroughWater = p.SeeThroughWater,
Mode = p.Mode,
Gradient = !p.NoGradient,
DrawShadows = !p.NoShadows
};
if (p.Mode == IsoCatMode.Chunk) {
newRenderer.Chunk = p.Region;
}
switch (p.Angle) {
case 90:
newRenderer.Rotation = 1;
break;
case 180:
newRenderer.Rotation = 2;
break;
case 270:
case -90:
newRenderer.Rotation = 3;
break;
}
return newRenderer;
}