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VR: Add buffer between left/right eye textures

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This prevents bleeding across the individual viewports
when the oculus SDK applies distortion mapping. The current
reccommended values are 100px for SDK <= 0.5 and 8px for > 0.5

See: http://static.oculus.com/sdk-downloads/documents/0.6.0/Oculus_Developer_Guide.pdf
  in the "Bugs Fixed Since the Last Release" section.

For an example of this artifact, see the correct scene render:
![Imgur](http://i.imgur.com/fZZExg8.jpg)

followed by a scene that bleeds the left eye into the right eye:
![Imgur](http://i.imgur.com/dZalmPS.jpg)
This commit is contained in:
Matthew Endsley 2015-06-04 18:08:08 -07:00
parent 3813b28e9b
commit 9020994470
1 changed files with 9 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/ovr.cpp
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@ -9,6 +9,12 @@
namespace bgfx
{
#if OVR_VERSION <= OVR_VERSION_050
static const int s_eyeBuffer = 100;
#else
static const int s_eyeBuffer = 8;
#endif // OVR_VERSION...
OVR::OVR()
: m_hmd(NULL)
, m_isenabled(false)
@ -50,7 +56,7 @@ namespace bgfx
ovrSizei sizeL = ovrHmd_GetFovTextureSize(m_hmd, ovrEye_Left, m_hmd->DefaultEyeFov[0], 1.0f);
ovrSizei sizeR = ovrHmd_GetFovTextureSize(m_hmd, ovrEye_Right, m_hmd->DefaultEyeFov[1], 1.0f);
m_rtSize.w = sizeL.w + sizeR.w;
m_rtSize.w = sizeL.w + sizeR.w + s_eyeBuffer;
m_rtSize.h = bx::uint32_max(sizeL.h, sizeR.h);
m_warning = true;
}
@ -169,12 +175,12 @@ ovrError:
ovrRecti rect;
rect.Pos.x = 0;
rect.Pos.y = 0;
rect.Size.w = m_rtSize.w/2;
rect.Size.w = (m_rtSize.w - s_eyeBuffer)/2;
rect.Size.h = m_rtSize.h;
m_texture[0].Header.RenderViewport = rect;
rect.Pos.x += rect.Size.w;
rect.Pos.x += rect.Size.w + s_eyeBuffer;
m_texture[1].Header.RenderViewport = rect;
m_timing = ovrHmd_BeginFrame(m_hmd, 0);