/// <summary>
/// Initializes a new instance of the OpenGLRenderTarget2D class.
/// </summary>
/// <param name="uv">The Ultraviolet context.</param>
/// <param name="width">The render target's width in pixels.</param>
/// <param name="height">The render target's height in pixels.</param>
/// <param name="usage">A <see cref="RenderTargetUsage"/> value specifying whether the
/// render target's data is discarded or preserved when it is bound to the graphics device.</param>
/// <param name="buffers">The collection of render buffers to attach to the target.</param>
public OpenGLRenderTarget2D(UltravioletContext uv, Int32 width, Int32 height, RenderTargetUsage usage, IEnumerable <RenderBuffer2D> buffers = null)
: base(uv)
{
Contract.EnsureRange(width > 0, nameof(width));
Contract.EnsureRange(height > 0, nameof(height));
// NOTE: If we're in an older version of GLES, we need to use glFramebufferTexture2D()
glFramebufferTextureIsSupported = !gl.IsGLES || gl.IsVersionAtLeast(3, 2);
var framebuffer = 0u;
uv.QueueWorkItemAndWait(() =>
{
using (OpenGLState.ScopedCreateFramebuffer(out framebuffer))
{
if (buffers != null)
{
foreach (OpenGLRenderBuffer2D buffer in buffers)
{
AttachRenderBuffer(buffer);
}
}
}
});
this.width = width;
this.height = height;
this.framebuffer = framebuffer;
this.renderTargetUsage = usage;
}