private void GL_pushState()
{
// Begin the effect, flagging to restore previous state on end
FNA3D.FNA3D_BeginPassRestore(
currentDevice.GLDevice,
shaderProgram.glEffect,
stateChangesPtr
);
// Prep our samplers
for (int i = 0; i < 3; i += 1)
{
oldTextures[i] = currentDevice.Textures[i];
oldSamplers[i] = currentDevice.SamplerStates[i];
currentDevice.Textures[i] = yuvTextures[i];
currentDevice.SamplerStates[i] = SamplerState.LinearClamp;
}
// Prep buffers
oldBuffers = currentDevice.GetVertexBuffers();
currentDevice.SetVertexBuffers(vertBuffer);
// Prep target bindings
oldTargets = currentDevice.GetRenderTargets();
unsafe
{
fixed(FNA3D.FNA3D_RenderTargetBinding *rt = &nativeVideoTexture[0])
{
GraphicsDevice.PrepareRenderTargetBindings(
rt,
videoTexture
);
FNA3D.FNA3D_SetRenderTargets(
currentDevice.GLDevice,
rt,
videoTexture.Length,
IntPtr.Zero,
DepthFormat.None,
0
);
}
}
// Prep render state
prevBlend = currentDevice.BlendState;
prevDepthStencil = currentDevice.DepthStencilState;
prevRasterizer = currentDevice.RasterizerState;
currentDevice.BlendState = BlendState.Opaque;
currentDevice.DepthStencilState = DepthStencilState.None;
currentDevice.RasterizerState = RasterizerState.CullNone;
// Prep viewport
prevViewport = currentDevice.Viewport;
FNA3D.FNA3D_SetViewport(
currentDevice.GLDevice,
ref viewport.viewport
);
}
private void GL_popState()
{
// End the effect, restoring the previous shader state
FNA3D.FNA3D_EndPassRestore(
currentDevice.GLDevice,
shaderProgram.glEffect
);
// Restore GL state
currentDevice.BlendState = prevBlend;
currentDevice.DepthStencilState = prevDepthStencil;
currentDevice.RasterizerState = prevRasterizer;
prevBlend = null;
prevDepthStencil = null;
prevRasterizer = null;
/* Restore targets using GLDevice directly.
* This prevents accidental clearing of previously bound targets.
*/
if (oldTargets == null || oldTargets.Length == 0)
{
FNA3D.FNA3D_SetRenderTargets(
currentDevice.GLDevice,
IntPtr.Zero,
0,
IntPtr.Zero,
DepthFormat.None,
0
);
}
else
{
IRenderTarget oldTarget = oldTargets[0].RenderTarget as IRenderTarget;
unsafe
{
fixed(FNA3D.FNA3D_RenderTargetBinding *rt = &nativeOldTargets[0])
{
GraphicsDevice.PrepareRenderTargetBindings(
rt,
oldTargets
);
FNA3D.FNA3D_SetRenderTargets(
currentDevice.GLDevice,
rt,
oldTargets.Length,
oldTarget.DepthStencilBuffer,
oldTarget.DepthStencilFormat,
(byte)(oldTarget.RenderTargetUsage != RenderTargetUsage.DiscardContents ? 1 : 0) /* lol c# */
);
}
}
}
oldTargets = null;
// Set viewport AFTER setting targets!
FNA3D.FNA3D_SetViewport(
currentDevice.GLDevice,
ref prevViewport.viewport
);
// Restore buffers
currentDevice.SetVertexBuffers(oldBuffers);
oldBuffers = null;
// Restore samplers
for (int i = 0; i < 3; i += 1)
{
/* The application may have set a texture ages
* ago, only to not unset after disposing. We
* have to avoid an ObjectDisposedException!
*/
if (oldTextures[i] == null || !oldTextures[i].IsDisposed)
{
currentDevice.Textures[i] = oldTextures[i];
}
currentDevice.SamplerStates[i] = oldSamplers[i];
oldTextures[i] = null;
oldSamplers[i] = null;
}
}