/*!***********************************************************************
@Function PVRTGetTextureDataSize
@Input iMipLevel Specifies a mip level to check, 'PVRTEX_ALLMIPLEVELS'
can be passed to get the size of all MIP levels.
@Input bAllSurfs Size of all surfaces is calculated if true,
only a single surface if false.
@Input bAllFaces Size of all faces is calculated if true,
only a single face if false.
@Return PVRTuint32 Size in BYTES of the specified texture area.
@Description Gets the size in BYTES of the texture, given various input
parameters. User can retrieve the size of either all
surfaces or a single surface, all faces or a single face and
all MIP-Maps or a single specified MIP level.
*************************************************************************/
PVRTuint32 PVRTGetTextureDataSize(PVRTextureHeaderV3 sTextureHeader, PVRTint32 iMipLevel, bool bAllSurfaces, bool bAllFaces)
{
//The smallest divisible sizes for a pixel format
PVRTuint32 uiSmallestWidth=1;
PVRTuint32 uiSmallestHeight=1;
PVRTuint32 uiSmallestDepth=1;
PVRTuint64 PixelFormatPartHigh = sTextureHeader.u64PixelFormat&PVRTEX_PFHIGHMASK;
//If the pixel format is compressed, get the pixel format's minimum dimensions.
if (PixelFormatPartHigh==0)
{
PVRTGetFormatMinDims((EPVRTPixelFormat)sTextureHeader.u64PixelFormat, uiSmallestWidth, uiSmallestHeight, uiSmallestDepth);
}
//Needs to be 64-bit integer to support 16kx16k and higher sizes.
PVRTuint64 uiDataSize = 0;
if (iMipLevel==-1)
{
for (PVRTuint8 uiCurrentMIP = 0; uiCurrentMIP<sTextureHeader.u32MIPMapCount; ++uiCurrentMIP)
{
//Get the dimensions of the current MIP Map level.
PVRTuint32 uiWidth = PVRT_MAX(1,sTextureHeader.u32Width>>uiCurrentMIP);
PVRTuint32 uiHeight = PVRT_MAX(1,sTextureHeader.u32Height>>uiCurrentMIP);
PVRTuint32 uiDepth = PVRT_MAX(1,sTextureHeader.u32Depth>>uiCurrentMIP);
//If pixel format is compressed, the dimensions need to be padded.
if (PixelFormatPartHigh==0)
{
uiWidth = ((uiWidth + uiSmallestWidth - 1) / uiSmallestWidth) * uiSmallestWidth;
uiHeight = ((uiHeight + uiSmallestHeight - 1) / uiSmallestHeight) * uiSmallestHeight;
uiDepth = ((uiDepth + uiSmallestDepth - 1) / uiSmallestDepth) * uiSmallestDepth;
}
//Add the current MIP Map's data size to the total.
if (sTextureHeader.u64PixelFormat >= ePVRTPF_ASTC_4x4 && sTextureHeader.u64PixelFormat <= ePVRTPF_ASTC_6x6x6)
{
uiDataSize += (uiWidth / uiSmallestWidth) * (uiHeight / uiSmallestHeight) * (uiDepth / uiSmallestDepth) * 128;
}
else
{
uiDataSize += (PVRTuint64)PVRTGetBitsPerPixel(sTextureHeader.u64PixelFormat)*(PVRTuint64)uiWidth*(PVRTuint64)uiHeight*(PVRTuint64)uiDepth;
}
}
}
else
{
/*!***********************************************************************
@Function PVRTGetTextureDataSize
@Input iMipLevel Specifies a mip level to check, 'PVRTEX_ALLMIPLEVELS'
can be passed to get the size of all MIP levels.
@Input bAllSurfs Size of all surfaces is calculated if true,
only a single surface if false.
@Input bAllFaces Size of all faces is calculated if true,
only a single face if false.
@Return PVRTuint32 Size in BYTES of the specified texture area.
@Description Gets the size in BYTES of the texture, given various input
parameters. User can retrieve the size of either all
surfaces or a single surface, all faces or a single face and
all MIP-Maps or a single specified MIP level.
*************************************************************************/
PVRTuint32 PVRTGetTextureDataSize(PVRTextureHeaderV3 sTextureHeader, PVRTint32 iMipLevel, bool bAllSurfaces, bool bAllFaces)
{
//The smallest divisible sizes for a pixel format
PVRTuint32 uiSmallestWidth=1;
PVRTuint32 uiSmallestHeight=1;
PVRTuint32 uiSmallestDepth=1;
PVRTuint64 PixelFormatPartHigh = sTextureHeader.u64PixelFormat&PVRTEX_PFHIGHMASK;
//If the pixel format is compressed, get the pixel format's minimum dimensions.
if (PixelFormatPartHigh==0)
{
PVRTGetFormatMinDims((EPVRTPixelFormat)sTextureHeader.u64PixelFormat, uiSmallestWidth, uiSmallestHeight, uiSmallestDepth);
}
PVRTuint32 uiDataSize = 0;
if (iMipLevel==-1)
{
for (PVRTuint8 uiCurrentMIP = 0; uiCurrentMIP<sTextureHeader.u32MIPMapCount; ++uiCurrentMIP)
{
//Get the dimensions of the current MIP Map level.
PVRTuint32 uiWidth = PVRT_MAX(1,sTextureHeader.u32Width>>uiCurrentMIP);
PVRTuint32 uiHeight = PVRT_MAX(1,sTextureHeader.u32Height>>uiCurrentMIP);
PVRTuint32 uiDepth = PVRT_MAX(1,sTextureHeader.u32Depth>>uiCurrentMIP);
//If pixel format is compressed, the dimensions need to be padded.
if (PixelFormatPartHigh==0)
{
uiWidth=uiWidth+( (-1*uiWidth)%uiSmallestWidth);
uiHeight=uiHeight+( (-1*uiHeight)%uiSmallestHeight);
uiDepth=uiDepth+( (-1*uiDepth)%uiSmallestDepth);
}
//Add the current MIP Map's data size to the total.
uiDataSize+=PVRTGetBitsPerPixel(sTextureHeader.u64PixelFormat)*uiWidth*uiHeight*uiDepth;
}
}
else
{
