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Add Save R16G16B16A16_FLOAT to HDR (#175)

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swordow 2020-05-10 08:44:15 +08:00 committed by GitHub
parent 91d783dc22
commit c25f23eb46
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 60 additions and 5 deletions
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65
DirectXTex/DirectXTexHDR.cpp
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@ -10,7 +10,6 @@
//-------------------------------------------------------------------------------------
#include "DirectXTexP.h"
//
// In theory HDR (RGBE) Radiance files can have any of the following data orientations
//
@ -329,6 +328,48 @@ namespace
}
}
//-------------------------------------------------------------------------------------
// HalfToRGBE
//-------------------------------------------------------------------------------------
inline void HalfToRGBE(_Out_writes_(width * 4) uint8_t* pDestination, _In_reads_(width* fpp) const uint16_t* pSource, size_t width, _In_range_(3, 4) int fpp) noexcept
{
auto ePtr = pSource + width * size_t(fpp);
for (size_t j = 0; j < width; ++j)
{
if (pSource + 2 >= ePtr) break;
float r = PackedVector::XMConvertHalfToFloat(pSource[0]); r = (r >= 0.f) ? r : 0.f;
float g = PackedVector::XMConvertHalfToFloat(pSource[1]); g = (g >= 0.f) ? g : 0.f;
float b = PackedVector::XMConvertHalfToFloat(pSource[2]); b = (b >= 0.f) ? b : 0.f;
pSource += fpp;
const float max_xy = (r > g) ? r : g;
float max_xyz = (max_xy > b) ? max_xy : b;
if (max_xyz > 1e-32f)
{
int e;
max_xyz = frexpf(max_xyz, &e) * 256.f / max_xyz;
e += 128;
uint8_t red = uint8_t(r * max_xyz);
uint8_t green = uint8_t(g * max_xyz);
uint8_t blue = uint8_t(b * max_xyz);
pDestination[0] = red;
pDestination[1] = green;
pDestination[2] = blue;
pDestination[3] = (red || green || blue) ? uint8_t(e & 0xff) : 0u;
}
else
{
pDestination[0] = pDestination[1] = pDestination[2] = pDestination[3] = 0;
}
pDestination += 4;
}
}
//-------------------------------------------------------------------------------------
// Encode using Adapative RLE
//-------------------------------------------------------------------------------------
@ -883,9 +924,9 @@ HRESULT DirectX::SaveToHDRMemory(const Image& image, Blob& blob) noexcept
switch (image.format)
{
case DXGI_FORMAT_R32G32B32A32_FLOAT:
case DXGI_FORMAT_R16G16B16A16_FLOAT:
fpp = 4;
break;
case DXGI_FORMAT_R32G32B32_FLOAT:
fpp = 3;
break;
@ -937,7 +978,14 @@ HRESULT DirectX::SaveToHDRMemory(const Image& image, Blob& blob) noexcept
const uint8_t* sPtr = image.pixels;
for (size_t scan = 0; scan < image.height; ++scan)
{
FloatToRGBE(rgbe, reinterpret_cast<const float*>(sPtr), image.width, fpp);
if (image.format == DXGI_FORMAT_R32G32B32A32_FLOAT || image.format == DXGI_FORMAT_R32G32B32_FLOAT)
{
FloatToRGBE(rgbe, reinterpret_cast<const float*>(sPtr), image.width, fpp);
}
else if (image.format == DXGI_FORMAT_R16G16B16A16_FLOAT)
{
HalfToRGBE(rgbe, reinterpret_cast<const uint16_t*>(sPtr), image.width, fpp);
}
sPtr += image.rowPitch;
size_t encSize = EncodeRLE(enc, rgbe, rowPitch, image.width);
@ -988,9 +1036,9 @@ HRESULT DirectX::SaveToHDRFile(const Image& image, const wchar_t* szFile) noexce
switch (image.format)
{
case DXGI_FORMAT_R32G32B32A32_FLOAT:
case DXGI_FORMAT_R16G16B16A16_FLOAT:
fpp = 4;
break;
case DXGI_FORMAT_R32G32B32_FLOAT:
fpp = 3;
break;
@ -1088,7 +1136,14 @@ HRESULT DirectX::SaveToHDRFile(const Image& image, const wchar_t* szFile) noexce
const uint8_t* sPtr = image.pixels;
for (size_t scan = 0; scan < image.height; ++scan)
{
FloatToRGBE(rgbe, reinterpret_cast<const float*>(sPtr), image.width, fpp);
if (image.format == DXGI_FORMAT_R32G32B32A32_FLOAT || image.format == DXGI_FORMAT_R32G32B32_FLOAT)
{
FloatToRGBE(rgbe, reinterpret_cast<const float*>(sPtr), image.width, fpp);
}
else if (image.format == DXGI_FORMAT_R16G16B16A16_FLOAT)
{
HalfToRGBE(rgbe, reinterpret_cast<const uint16_t*>(sPtr), image.width, fpp);
}
sPtr += image.rowPitch;
size_t encSize = EncodeRLE(enc, rgbe, rowPitch, image.width);