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Use shift directly instead of float casts (#2714)

This commit is contained in:
Jean Tampon 2022-01-16 17:15:14 +01:00 committed by GitHub
parent 134d1787e7
commit cd2030cc11
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 17 additions and 22 deletions
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39
examples/38-bloom/bloom.cpp
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@ -178,10 +178,10 @@ void screenSpaceQuad(float _textureWidth, float _textureHeight, float _texelHalf
}
}
class ExampleDeferred : public entry::AppI
class ExampleBloom : public entry::AppI
{
public:
ExampleDeferred(const char* _name, const char* _description, const char* _url)
ExampleBloom(const char* _name, const char* _description, const char* _url)
: entry::AppI(_name, _description, _url)
{
}
@ -396,11 +396,9 @@ public:
bgfx::destroy(m_texChainFb[ii]);
}
const float dim = float(1 << ii);
m_texChainFb[ii] = bgfx::createFrameBuffer(
(uint16_t)(m_width / dim)
, (uint16_t)(m_height / dim)
(uint16_t)(m_width >> ii)
, (uint16_t)(m_height >> ii)
, bgfx::TextureFormat::RGBA32F
, tsFlags
);
@ -446,21 +444,19 @@ public:
for (uint16_t ii = 0; ii < TEX_CHAIN_LEN-1; ++ii)
{
const float dim = float(1 << (ii + 1) );
const uint16_t shift = ii + 1;
bgfx::setViewRect(RENDER_PASS_DOWNSAMPLE0_ID + ii, 0, 0
, uint16_t(m_width / dim)
, uint16_t(m_height / dim)
, uint16_t(m_width >> shift)
, uint16_t(m_height >> shift)
);
}
for (uint16_t ii = 0; ii < TEX_CHAIN_LEN-1; ++ii)
{
const float dim = float(1 << (TEX_CHAIN_LEN - ii - 2) );
const uint16_t shift = TEX_CHAIN_LEN - ii - 2;
bgfx::setViewRect(RENDER_PASS_UPSAMPLE0_ID + ii, 0, 0
, uint16_t(m_width / dim)
, uint16_t(m_height / dim)
, uint16_t(m_width >> shift)
, uint16_t(m_height >> shift)
);
}
@ -539,11 +535,11 @@ public:
// Now downsample.
for (uint16_t ii = 0; ii < TEX_CHAIN_LEN-1; ++ii)
{
const float dim = float(1 << (ii + 1) );
const uint16_t shift = ii + 1;
const float pixelSize[4] =
{
1.0f / (m_width / dim),
1.0f / (m_height / dim),
1.0f / (float)(m_width >> shift),
1.0f / (float)(m_height >> shift),
0.0f,
0.0f,
};
@ -563,12 +559,11 @@ public:
// Now upsample.
for (uint16_t ii = 0; ii < TEX_CHAIN_LEN - 1; ++ii)
{
const float dim = float(1 << (TEX_CHAIN_LEN - 2 - ii) );
const uint16_t shift = TEX_CHAIN_LEN - 2 - ii;
const float pixelSize[4] =
{
1.0f / (float)(m_width / dim),
1.0f / (float)(m_height / dim),
1.0f / (float)(m_width >> shift),
1.0f / (float)(m_height >> shift),
0.0f,
0.0f,
};
@ -658,7 +653,7 @@ public:
} // namespace
ENTRY_IMPLEMENT_MAIN(
ExampleDeferred
ExampleBloom
, "38-bloom"
, "Bloom."
, "https://bkaradzic.github.io/bgfx/examples.html#bloom"