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Fix gpudrivenrendering example on Linux 

Skip the first frame because the content of m_drawcallInstanceCounts is uninitialized,
and the atomicAdd used in RENDER_PASS_OCCLUDE_PROPS_ID can produce random results.

Fixes #1794
This commit is contained in:
Pierre-Eric Pelloux-Prayer 2019-06-20 20:56:38 +02:00
parent d558315887
commit ef3ad2bdd1
1 changed files with 7 additions and 2 deletions
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9
examples/37-gpudrivenrendering/gpudrivenrendering.cpp
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@ -695,6 +695,7 @@ public:
m_timeOffset = bx::getHPCounter();
m_useIndirect = true;
m_firstFrame = true;
imguiCreate();
}
@ -823,7 +824,7 @@ public:
bgfx::setTexture(0, s_texOcclusionDepth, getTexture(m_hiZDepthBuffer, 0));
bgfx::setImage(1, getTexture(m_hiZBuffer, 0), 0, bgfx::Access::Write);
bgfx::dispatch(RENDER_PASS_HIZ_DOWNSCALE_ID, m_programCopyZ, width/16, height/16);
}
@ -916,7 +917,9 @@ public:
// Set "material" data (currently a color only)
bgfx::setUniform(u_color, &m_materials[0].m_color, m_noofMaterials);
if (m_useIndirect)
// We can't use indirect drawing for the first frame because the content of m_drawcallInstanceCounts
// is initially undefined.
if (m_useIndirect && !m_firstFrame)
{
// Set vertex and index buffer.
bgfx::setVertexBuffer(0, m_allPropsVertexbufferHandle);
@ -967,6 +970,7 @@ public:
}
}
}
m_firstFrame = false;
}
bool update() override
@ -1131,6 +1135,7 @@ public:
uint8_t m_noofHiZMips;
bool m_useIndirect;
bool m_firstFrame;
Camera m_camera;
Mouse m_mouse;