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Reverse-Z detection on output for vulkan

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baldurk
2016-02-07 18:51:36 +01:00
parent a9ed1c8c02
commit cc75e660ed
2 changed files with 17 additions and 2 deletions
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renderdoc/driver/vulkan/vk_debug.cpp
+14 -1
View File
@@ -5053,6 +5053,8 @@ void VulkanDebugManager::InitPostVSBuffers(uint32_t frameID, uint32_t eventID)
float farp = 100.0f;
Vec4f *pos0 = (Vec4f *)byteData;
bool found = false;
// expect position at the start of the buffer, as system values are sorted first
// and position is the first value
@@ -5080,7 +5082,7 @@ void VulkanDebugManager::InitPostVSBuffers(uint32_t frameID, uint32_t eventID)
Vec4f *pos = (Vec4f *)(byteData + i*bufStride);
// skip invalid vertices (w=0)
if(pos->w > 0.0f && fabs(pos->w - pos0->w) > 0.01f)
if(pos->w != 0.0f && fabs(pos->w - pos0->w) > 0.01f && fabs(pos->z - pos0->z) > 0.01f)
{
Vec2f A(pos0->w, pos0->z);
Vec2f B(pos->w, pos->z);
@@ -5095,10 +5097,21 @@ void VulkanDebugManager::InitPostVSBuffers(uint32_t frameID, uint32_t eventID)
nearp = -c/m;
farp = c/(1-m);
found = true;
break;
}
}
// if we didn't find anything, all z's and w's were identical.
// If the z is positive and w greater for the first element then
// we detect this projection as reversed z with infinite far plane
if(!found && pos0->z > 0.0f && pos0->w > pos0->z)
{
nearp = pos0->z;
farp = FLT_MAX;
}
m_pDriver->vkUnmapMemory(m_Device, readbackMem);
// clean up temporary memories
renderdoc/driver/vulkan/vk_replay.cpp
+3 -1
View File
@@ -1520,7 +1520,9 @@ void VulkanReplay::RenderMesh(uint32_t frameID, uint32_t eventID, const vector<M
{
// the derivation of the projection matrix might not be right (hell, it could be an
// orthographic projection). But it'll be close enough likely.
Matrix4f guessProj = Matrix4f::Perspective(cfg.fov, cfg.position.nearPlane, cfg.position.farPlane, cfg.aspect);
Matrix4f guessProj = cfg.position.farPlane != FLT_MAX
? Matrix4f::Perspective(cfg.fov, cfg.position.nearPlane, cfg.position.farPlane, cfg.aspect)
: Matrix4f::ReversePerspective(cfg.fov, cfg.position.nearPlane, cfg.aspect);
if(cfg.ortho)
{