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Branimir Karadžić
2018-06-21 19:10:14 -07:00
parent ba82899651
commit c3a55957f2
4 changed files with 248 additions and 28 deletions
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132
src/image.cpp
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@@ -709,6 +709,136 @@ namespace bimg
imageRgba32fLinearDownsample2x2Ref(_dst, _width, _height, _depth, _srcPitch, _src);
}
void imageRgba32fDownsample2x2Ref(void* _dst, uint32_t _width, uint32_t _height, uint32_t _depth, uint32_t _srcPitch, const void* _src)
{
const uint32_t dstWidth = _width/2;
const uint32_t dstHeight = _height/2;
const uint32_t dstDepth = _depth/2;
if (0 == dstWidth
|| 0 == dstHeight)
{
return;
}
const uint8_t* src = (const uint8_t*)_src;
uint8_t* dst = (uint8_t*)_dst;
if (0 == dstDepth)
{
for (uint32_t yy = 0, ystep = _srcPitch*2; yy < dstHeight; ++yy, src += ystep)
{
const float* rgba0 = (const float*)&src[0];
const float* rgba1 = (const float*)&src[_srcPitch];
for (uint32_t xx = 0; xx < dstWidth; ++xx, rgba0 += 8, rgba1 += 8, dst += 16)
{
float xyz[4];
xyz[0] = bx::toLinear(rgba0[0]);
xyz[1] = bx::toLinear(rgba0[1]);
xyz[2] = bx::toLinear(rgba0[2]);
xyz[3] = rgba0[3];
xyz[0] += bx::toLinear(rgba0[4]);
xyz[1] += bx::toLinear(rgba0[5]);
xyz[2] += bx::toLinear(rgba0[6]);
xyz[3] += rgba0[7];
xyz[0] += bx::toLinear(rgba1[0]);
xyz[1] += bx::toLinear(rgba1[1]);
xyz[2] += bx::toLinear(rgba1[2]);
xyz[3] += rgba1[3];
xyz[0] += bx::toLinear(rgba1[4]);
xyz[1] += bx::toLinear(rgba1[5]);
xyz[2] += bx::toLinear(rgba1[6]);
xyz[3] += rgba1[7];
xyz[0] = bx::toGamma(xyz[0]/4.0f);
xyz[1] = bx::toGamma(xyz[1]/4.0f);
xyz[2] = bx::toGamma(xyz[2]/4.0f);
xyz[3] = xyz[3]/4.0f;
bx::packRgba32F(dst, xyz);
}
}
}
else
{
const uint32_t slicePitch = _srcPitch*_height;
for (uint32_t zz = 0; zz < dstDepth; ++zz, src += slicePitch)
{
for (uint32_t yy = 0, ystep = _srcPitch*2; yy < dstHeight; ++yy, src += ystep)
{
const float* rgba0 = (const float*)&src[0];
const float* rgba1 = (const float*)&src[_srcPitch];
const float* rgba2 = (const float*)&src[slicePitch];
const float* rgba3 = (const float*)&src[slicePitch+_srcPitch];
for (uint32_t xx = 0
; xx < dstWidth
; ++xx, rgba0 += 8, rgba1 += 8, rgba2 += 8, rgba3 += 8, dst += 16
)
{
float xyz[4];
xyz[0] = bx::toLinear(rgba0[0]);
xyz[1] = bx::toLinear(rgba0[1]);
xyz[2] = bx::toLinear(rgba0[2]);
xyz[3] = rgba0[3];
xyz[0] += bx::toLinear(rgba0[4]);
xyz[1] += bx::toLinear(rgba0[5]);
xyz[2] += bx::toLinear(rgba0[6]);
xyz[3] += rgba0[7];
xyz[0] += bx::toLinear(rgba1[0]);
xyz[1] += bx::toLinear(rgba1[1]);
xyz[2] += bx::toLinear(rgba1[2]);
xyz[3] += rgba1[3];
xyz[0] += bx::toLinear(rgba1[4]);
xyz[1] += bx::toLinear(rgba1[5]);
xyz[2] += bx::toLinear(rgba1[6]);
xyz[3] += rgba1[7];
xyz[0] += bx::toLinear(rgba2[0]);
xyz[1] += bx::toLinear(rgba2[1]);
xyz[2] += bx::toLinear(rgba2[2]);
xyz[3] += rgba2[3];
xyz[0] += bx::toLinear(rgba2[4]);
xyz[1] += bx::toLinear(rgba2[5]);
xyz[2] += bx::toLinear(rgba2[6]);
xyz[3] += rgba2[7];
xyz[0] += bx::toLinear(rgba3[0]);
xyz[1] += bx::toLinear(rgba3[1]);
xyz[2] += bx::toLinear(rgba3[2]);
xyz[3] += rgba3[3];
xyz[0] += bx::toLinear(rgba3[4]);
xyz[1] += bx::toLinear(rgba3[5]);
xyz[2] += bx::toLinear(rgba3[6]);
xyz[3] += rgba3[7];
xyz[0] = bx::toGamma(xyz[0]/8.0f);
xyz[1] = bx::toGamma(xyz[1]/8.0f);
xyz[2] = bx::toGamma(xyz[2]/8.0f);
xyz[3] = xyz[3]/8.0f;
bx::packRgba32F(dst, xyz);
}
}
}
}
}
void imageRgba32fDownsample2x2(void* _dst, uint32_t _width, uint32_t _height, uint32_t _depth, uint32_t _srcPitch, const void* _src)
{
imageRgba32fDownsample2x2Ref(_dst, _width, _height, _depth, _srcPitch, _src);
}
void imageRgba32fDownsample2x2NormalMapRef(void* _dst, uint32_t _width, uint32_t _height, uint32_t _srcPitch, uint32_t _dstPitch, const void* _src)
{
const uint32_t dstWidth = _width/2;
@@ -1037,7 +1167,7 @@ namespace bimg
if (_dstFormat == _srcFormat)
{
bx::memCopy(_dst, _src, _width*_height*_depth*srcBpp/8);
bx::memCopy(_dst, _src, _width*_height*_depth*(srcBpp/8) );
return true;
}