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DDS support for 8-bit uncompressed formats.

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bkaradzic
2012-04-30 22:35:16 -07:00
parent d25592f919
commit fb37505a8a
4 changed files with 60 additions and 29 deletions
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43
src/dds.cpp
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@@ -286,24 +286,16 @@ void Mip::decode(uint8_t* _dst)
{
uint32_t width = m_width;
uint32_t height = m_height;
uint32_t pitch = m_width*4;
if (m_hasAlpha)
if (m_bpp == 1
|| m_bpp == 4)
{
for (uint32_t yy = 0; yy < height; ++yy)
{
uint8_t* dst = &_dst[yy*pitch];
for (uint32_t xx = 0; xx < width; ++xx)
{
memcpy(dst, src, 4);
dst += 4;
src += 4;
}
}
uint32_t pitch = m_width*m_bpp;
memcpy(_dst, src, pitch*height);
}
else
{
uint32_t pitch = m_width*4;
for (uint32_t yy = 0; yy < height; ++yy)
{
uint8_t* dst = &_dst[yy*pitch];
@@ -398,6 +390,7 @@ bool parseDds(Dds& _dds, const Memory* _mem)
stream.skip(4); // reserved
uint8_t bpp = 1;
uint8_t blockSize = 1;
uint8_t type = 0;
bool hasAlpha = pixelFlags & DDPF_ALPHAPIXELS;
@@ -426,7 +419,26 @@ bool parseDds(Dds& _dds, const Memory* _mem)
}
else
{
blockSize *= hasAlpha ? 4 : 3;
switch (pixelFlags)
{
case DDPF_RGB:
blockSize *= 3;
break;
case DDPF_RGB|DDPF_ALPHAPIXELS:
blockSize *= 4;
break;
case DDPF_LUMINANCE:
case DDPF_INDEXED:
case DDPF_ALPHA:
bpp = 1;
break;
default:
bpp = 0;
break;
}
}
_dds.m_width = width;
@@ -434,6 +446,7 @@ bool parseDds(Dds& _dds, const Memory* _mem)
_dds.m_depth = depth;
_dds.m_blockSize = blockSize;
_dds.m_numMips = (caps[0] & DDSCAPS_MIPMAP) ? mips : 1;
_dds.m_bpp = bpp;
_dds.m_type = type;
_dds.m_hasAlpha = hasAlpha;
@@ -446,6 +459,7 @@ bool getRawImageData(const Dds& _dds, uint8_t _index, const Memory* _mem, Mip& _
uint32_t height = _dds.m_height;
uint32_t blockSize = _dds.m_blockSize;
uint32_t offset = DDS_IMAGE_DATA_OFFSET;
uint8_t bpp = _dds.m_bpp;
uint8_t type = _dds.m_type;
bool hasAlpha = _dds.m_hasAlpha;
@@ -472,6 +486,7 @@ bool getRawImageData(const Dds& _dds, uint8_t _index, const Memory* _mem, Mip& _
_mip.m_blockSize = blockSize;
_mip.m_size = size;
_mip.m_data = _mem->data + offset;
_mip.m_bpp = bpp;
_mip.m_type = type;
_mip.m_hasAlpha = hasAlpha;
return true;