static public void UpdateSegmentation(ICollection <Tag> tags, Rectangle roiRect, uint frameBuffer,
uint thresholdTexName, uint roiTexName, uint[] segmentationPixelData,
int[] roiThresholdMin, int[] roiThresholdMax)
{
float[] thresholdMin = { 1, 1, 1 };
float[] thresholdMax = { 0, 0, 0 };
if (tags.Count == 0)
{
thresholdMin = new float[] { (float)roiThresholdMin[0] / 255.0f, (float)roiThresholdMin[1] / 255.0f, (float)roiThresholdMin[2] / 255.0f };
thresholdMax = new float[] { (float)roiThresholdMax[0] / 255.0f, (float)roiThresholdMax[1] / 255.0f, (float)roiThresholdMax[2] / 255.0f };
}
else
{
// TODO: use ALL thresholds
foreach (Tag tag in tags)
{
float[] min = new float[3];
float[] max = new float[3];
tag.GetNormalizedMaxMin(ref min, ref max);
thresholdMin[0] = Math.Min(thresholdMin[0], min[0]);
thresholdMin[1] = Math.Min(thresholdMin[1], min[1]);
thresholdMin[2] = Math.Min(thresholdMin[2], min[2]);
thresholdMax[0] = Math.Max(thresholdMax[0], max[0]);
thresholdMax[1] = Math.Max(thresholdMax[1], max[1]);
thresholdMax[2] = Math.Max(thresholdMax[2], max[2]);
// thresholdMin = new float[3] { min[0], min[1], min[2]};
// thresholdMax = new float[3] { max[0], max[1], max[2]};
Console.WriteLine("color:" + tag.Color[0] + "," + tag.Color[1] + "," + tag.Color[2]);
}
}
// Setup thresholdTexName as framebuffer
int[] oldViewPort = new int[4];
GL.GetInteger(GetPName.Viewport, oldViewPort);
GL.Viewport(0, 0, roiRect.Size.Width, roiRect.Size.Height);
int fboOld = GLHelper.bindFrameBuffer(frameBuffer, thresholdTexName);
// Clear
GL.ClearColor(1.0f, 0.0f, 0.0f, 1.0f);
GL.Clear(ClearBufferMask.ColorBufferBit);
float x = 0;
float y = 0;
float width = roiRect.Size.Width;
float height = roiRect.Size.Height;
float[] Vertices =
{
x + width, y,
x + width, y + height,
x, y,
x, y + height
};
float[] Texture = { 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f };
Vector4 color = new Vector4(1, 1, 1, 1);
Matrix4 mat = Matrix4.CreateOrthographicOffCenter(0, (float)roiRect.Size.Width, 0, (float)roiRect.Size.Height, -1.0f, 1.0f);
ThresholdShader shader = ThresholdShader.Singleton;
// Use shader
shader.Use();
// Set texture
shader.SetTexture(roiTexName);
// Set threshold
Vector4 vMin = new Vector4(thresholdMin[0], thresholdMin[2], thresholdMin[2], 1);
Vector4 vMax = new Vector4(thresholdMax[0], thresholdMax[2], thresholdMax[2], 1);
shader.SetThreshold(vMin, vMax);
shader.setColor(color);
// Set Model view
GL.UniformMatrix4(shader.muMVPMatrixHandle, 1, false, ref mat.Row0.X);
// Set vertex and texture coords
GL.EnableVertexAttribArray(shader.maPositionHandle);
GL.EnableVertexAttribArray(shader.maTexCoordHandle);
GL.VertexAttribPointer(shader.maPositionHandle, 2, VertexAttribPointerType.Float, false, 0, Vertices);
GL.VertexAttribPointer(shader.maTexCoordHandle, 2, VertexAttribPointerType.Float, false, 0, Texture);
GL.DrawArrays(BeginMode.TriangleStrip, 0, 4);
GL.DisableVertexAttribArray(shader.maPositionHandle);
GL.DisableVertexAttribArray(shader.maTexCoordHandle);
// Read pixel data
{
GL.ReadPixels(0, 0, roiRect.Size.Width, roiRect.Size.Height, PixelFormat.Rgba, PixelType.UnsignedByte, segmentationPixelData);
// GL.ReadPixels<uint>(0, 0, roiRect.Size.Width, roiRect.Size.Height, All.Rgba, All.UnsignedByte, segmentationPixelData);
}
// unbind framebuffer and cleanup viewport
GL.BindFramebuffer(FramebufferTarget.Framebuffer, fboOld);
GL.Viewport(oldViewPort[0], oldViewPort[1], oldViewPort[2], oldViewPort[3]);
}
// TODO: find better way to access shaders
public static void Reset()
{
singleton = null;
}