Method ViewportToTextureBounds

Revive/CompositorBase.cpp:281–315

}

vr::VRTextureBounds_t CompositorBase::ViewportToTextureBounds(ovrRecti viewport, ovrTextureSwapChain swapChain, unsigned int flags)
{
	vr::VRTextureBounds_t bounds;
	float w = (float)swapChain->Desc.Width;
	float h = (float)swapChain->Desc.Height;
	bounds.uMin = viewport.Pos.x / w;
	bounds.vMin = viewport.Pos.y / h;

	// Sanity check for the viewport size.
	// Workaround for Defense Grid 2, which leaves these variables uninitialized.
	if (viewport.Size.w > 0 && viewport.Size.h > 0)
	{
		bounds.uMax = (viewport.Pos.x + viewport.Size.w) / w;
		bounds.vMax = (viewport.Pos.y + viewport.Size.h) / h;
	}
	else
	{
		bounds.uMax = 1.0f;
		bounds.vMax = 1.0f;
	}

	if (flags & ovrLayerFlag_TextureOriginAtBottomLeft)
	{
		bounds.vMin = 1.0f - bounds.vMin;
		bounds.vMax = 1.0f - bounds.vMax;
	}

	if (GetAPI() == vr::TextureType_OpenGL)
	{
		bounds.vMin = 1.0f - bounds.vMin;
		bounds.vMax = 1.0f - bounds.vMax;
	}

	return bounds;
}

void CompositorBase::BlitLayers(const ovrLayerHeader* dstLayer, const ovrLayerHeader* srcLayer)
{