/// <summary>
/// Initializes a new instance of the <see cref="PreProcessor"/> class.
/// </summary>
public PreProcessor()
{
_buffer.Clear();
_buffer.Triangle(0, 1, 2);
_buffer.Triangle(0, 2, 3);
_buffer.VertexFloat(-1, -1);
_buffer.EndVertex();
_buffer.VertexFloat(1, -1);
_buffer.EndVertex();
_buffer.VertexFloat(1, 1);
_buffer.EndVertex();
_buffer.VertexFloat(-1, 1);
_buffer.EndVertex();
_vertexArray.SetData(_buffer, BufferUsageHint.StaticDraw);
}
/// <summary>
/// Begins a new frame and sets the dimensions of the render area.
/// </summary>
/// <param name="width">The width in pixels.</param>
/// <param name="height">The height in pixels.</param>
internal void BeginFrame(int width, int height)
{
if (_width != width || _height != height)
{
_width = width;
_height = height;
for (int i = 0; i < _blurFramebuffers.Length; ++i)
{
_blurFramebuffers[i].SetSize(width * 2 / 3, height * 2 / 3);
}
float w, h;
float a = (float)(width / GraphicsConstants.Width * GraphicsConstants.Height / height);
if (a > 1)
{
h = 1;
w = a;
}
else
{
w = 1;
h = 1 / a;
}
_triangleBuffer.Clear();
_triangleBuffer.Triangle(0, 1, 2);
_triangleBuffer.Triangle(0, 2, 3);
_triangleBuffer.VertexFloat(-1, -1);
_triangleBuffer.VertexFloat(-w, -h);
_triangleBuffer.EndVertex();
_triangleBuffer.VertexFloat(1, -1);
_triangleBuffer.VertexFloat(w, -h);
_triangleBuffer.EndVertex();
_triangleBuffer.VertexFloat(1, 1);
_triangleBuffer.VertexFloat(w, h);
_triangleBuffer.EndVertex();
_triangleBuffer.VertexFloat(-1, 1);
_triangleBuffer.VertexFloat(-w, h);
_triangleBuffer.EndVertex();
_vertexArray.SetData(_triangleBuffer, BufferUsageHint.StaticDraw);
}
}
/// <summary>
/// Begins a new frame and sets the dimensions of the render area.
/// </summary>
/// <param name="width">The width in pixels.</param>
/// <param name="height">The height in pixels.</param>
public void BeginFrame(int width, int height)
{
_postProcessor.BeginFrame(width, height);
if ((double)width / (double)height > GraphicsConstants.Width / GraphicsConstants.Height)
{
width = (int)Math.Ceiling(height / GraphicsConstants.Height * GraphicsConstants.Width);
}
else
{
height = (int)Math.Ceiling(width / GraphicsConstants.Width * GraphicsConstants.Height);
}
if (_width != width || _height != height)
{
_width = width;
_height = height;
_framebuffer.SetSize(width, height);
}
_lineBuffer.Clear();
_pointBuffer.Clear();
float screenAspect = (float)_width / (float)_height;
float terminalAspect = (float)GraphicsConstants.Width / (float)GraphicsConstants.Height;
if (terminalAspect > screenAspect)
{
_xScale = 2f / (float)GraphicsConstants.Width;
_xOffset = -1;
_yScale = 2f / (float)GraphicsConstants.Height * (screenAspect / terminalAspect);
_yOffset = -1;
}
else
{
_xScale = 2f / (float)GraphicsConstants.Width * (terminalAspect / screenAspect);
_xOffset = -1;
_yScale = 2f / (float)GraphicsConstants.Height;
_yOffset = -1;
}
}