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dust3d/application/sources/dds_file.cc

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#include "dds_file.h"
#include <QByteArray>
#include <QDebug>
#include <QFile>
#include <QOpenGLPixelTransferOptions>
#include <QtEndian>
#include <QtGlobal>
#ifndef _WIN32
typedef quint32 DWORD;
typedef quint32 UINT;
#endif
// DDS data struct copy from
// https://docs.microsoft.com/en-us/windows/win32/direct3ddds/dx-graphics-dds-pguide
typedef struct {
DWORD dwSize;
DWORD dwFlags;
DWORD dwFourCC;
DWORD dwRGBBitCount;
DWORD dwRBitMask;
DWORD dwGBitMask;
DWORD dwBBitMask;
DWORD dwABitMask;
} DDS_PIXELFORMAT;
typedef enum {
DDSCAPS2_CUBEMAP = 0x200,
DDSCAPS2_CUBEMAP_POSITIVEX = 0x400,
DDSCAPS2_CUBEMAP_NEGATIVEX = 0x800,
DDSCAPS2_CUBEMAP_POSITIVEY = 0x1000,
DDSCAPS2_CUBEMAP_NEGATIVEY = 0x2000,
DDSCAPS2_CUBEMAP_POSITIVEZ = 0x4000,
DDSCAPS2_CUBEMAP_NEGATIVEZ = 0x8000,
DDSCAPS2_VOLUME = 0x200000
} DDS_CAPS2_FLAGS;
typedef struct {
DWORD dwSize;
DWORD dwFlags;
DWORD dwHeight;
DWORD dwWidth;
DWORD dwPitchOrLinearSize;
DWORD dwDepth;
DWORD dwMipMapCount;
DWORD dwReserved1[11];
DDS_PIXELFORMAT ddspf;
DWORD dwCaps;
DWORD dwCaps2;
DWORD dwCaps3;
DWORD dwCaps4;
DWORD dwReserved2;
} DDS_HEADER;
typedef enum {
DXGI_FORMAT_UNKNOWN,
DXGI_FORMAT_R32G32B32A32_TYPELESS,
DXGI_FORMAT_R32G32B32A32_FLOAT,
DXGI_FORMAT_R32G32B32A32_UINT,
DXGI_FORMAT_R32G32B32A32_SINT,
DXGI_FORMAT_R32G32B32_TYPELESS,
DXGI_FORMAT_R32G32B32_FLOAT,
DXGI_FORMAT_R32G32B32_UINT,
DXGI_FORMAT_R32G32B32_SINT,
DXGI_FORMAT_R16G16B16A16_TYPELESS,
DXGI_FORMAT_R16G16B16A16_FLOAT,
DXGI_FORMAT_R16G16B16A16_UNORM,
DXGI_FORMAT_R16G16B16A16_UINT,
DXGI_FORMAT_R16G16B16A16_SNORM,
DXGI_FORMAT_R16G16B16A16_SINT,
DXGI_FORMAT_R32G32_TYPELESS,
DXGI_FORMAT_R32G32_FLOAT,
DXGI_FORMAT_R32G32_UINT,
DXGI_FORMAT_R32G32_SINT,
DXGI_FORMAT_R32G8X24_TYPELESS,
DXGI_FORMAT_D32_FLOAT_S8X24_UINT,
DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS,
DXGI_FORMAT_X32_TYPELESS_G8X24_UINT,
DXGI_FORMAT_R10G10B10A2_TYPELESS,
DXGI_FORMAT_R10G10B10A2_UNORM,
DXGI_FORMAT_R10G10B10A2_UINT,
DXGI_FORMAT_R11G11B10_FLOAT,
DXGI_FORMAT_R8G8B8A8_TYPELESS,
DXGI_FORMAT_R8G8B8A8_UNORM,
DXGI_FORMAT_R8G8B8A8_UNORM_SRGB,
DXGI_FORMAT_R8G8B8A8_UINT,
DXGI_FORMAT_R8G8B8A8_SNORM,
DXGI_FORMAT_R8G8B8A8_SINT,
DXGI_FORMAT_R16G16_TYPELESS,
DXGI_FORMAT_R16G16_FLOAT,
DXGI_FORMAT_R16G16_UNORM,
DXGI_FORMAT_R16G16_UINT,
DXGI_FORMAT_R16G16_SNORM,
DXGI_FORMAT_R16G16_SINT,
DXGI_FORMAT_R32_TYPELESS,
DXGI_FORMAT_D32_FLOAT,
DXGI_FORMAT_R32_FLOAT,
DXGI_FORMAT_R32_UINT,
DXGI_FORMAT_R32_SINT,
DXGI_FORMAT_R24G8_TYPELESS,
DXGI_FORMAT_D24_UNORM_S8_UINT,
DXGI_FORMAT_R24_UNORM_X8_TYPELESS,
DXGI_FORMAT_X24_TYPELESS_G8_UINT,
DXGI_FORMAT_R8G8_TYPELESS,
DXGI_FORMAT_R8G8_UNORM,
DXGI_FORMAT_R8G8_UINT,
DXGI_FORMAT_R8G8_SNORM,
DXGI_FORMAT_R8G8_SINT,
DXGI_FORMAT_R16_TYPELESS,
DXGI_FORMAT_R16_FLOAT,
DXGI_FORMAT_D16_UNORM,
DXGI_FORMAT_R16_UNORM,
DXGI_FORMAT_R16_UINT,
DXGI_FORMAT_R16_SNORM,
DXGI_FORMAT_R16_SINT,
DXGI_FORMAT_R8_TYPELESS,
DXGI_FORMAT_R8_UNORM,
DXGI_FORMAT_R8_UINT,
DXGI_FORMAT_R8_SNORM,
DXGI_FORMAT_R8_SINT,
DXGI_FORMAT_A8_UNORM,
DXGI_FORMAT_R1_UNORM,
DXGI_FORMAT_R9G9B9E5_SHAREDEXP,
DXGI_FORMAT_R8G8_B8G8_UNORM,
DXGI_FORMAT_G8R8_G8B8_UNORM,
DXGI_FORMAT_BC1_TYPELESS,
DXGI_FORMAT_BC1_UNORM,
DXGI_FORMAT_BC1_UNORM_SRGB,
DXGI_FORMAT_BC2_TYPELESS,
DXGI_FORMAT_BC2_UNORM,
DXGI_FORMAT_BC2_UNORM_SRGB,
DXGI_FORMAT_BC3_TYPELESS,
DXGI_FORMAT_BC3_UNORM,
DXGI_FORMAT_BC3_UNORM_SRGB,
DXGI_FORMAT_BC4_TYPELESS,
DXGI_FORMAT_BC4_UNORM,
DXGI_FORMAT_BC4_SNORM,
DXGI_FORMAT_BC5_TYPELESS,
DXGI_FORMAT_BC5_UNORM,
DXGI_FORMAT_BC5_SNORM,
DXGI_FORMAT_B5G6R5_UNORM,
DXGI_FORMAT_B5G5R5A1_UNORM,
DXGI_FORMAT_B8G8R8A8_UNORM,
DXGI_FORMAT_B8G8R8X8_UNORM,
DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM,
DXGI_FORMAT_B8G8R8A8_TYPELESS,
DXGI_FORMAT_B8G8R8A8_UNORM_SRGB,
DXGI_FORMAT_B8G8R8X8_TYPELESS,
DXGI_FORMAT_B8G8R8X8_UNORM_SRGB,
DXGI_FORMAT_BC6H_TYPELESS,
DXGI_FORMAT_BC6H_UF16,
DXGI_FORMAT_BC6H_SF16,
DXGI_FORMAT_BC7_TYPELESS,
DXGI_FORMAT_BC7_UNORM,
DXGI_FORMAT_BC7_UNORM_SRGB,
DXGI_FORMAT_AYUV,
DXGI_FORMAT_Y410,
DXGI_FORMAT_Y416,
DXGI_FORMAT_NV12,
DXGI_FORMAT_P010,
DXGI_FORMAT_P016,
DXGI_FORMAT_420_OPAQUE,
DXGI_FORMAT_YUY2,
DXGI_FORMAT_Y210,
DXGI_FORMAT_Y216,
DXGI_FORMAT_NV11,
DXGI_FORMAT_AI44,
DXGI_FORMAT_IA44,
DXGI_FORMAT_P8,
DXGI_FORMAT_A8P8,
DXGI_FORMAT_B4G4R4A4_UNORM,
DXGI_FORMAT_P208,
DXGI_FORMAT_V208,
DXGI_FORMAT_V408,
DXGI_FORMAT_FORCE_UINT
} DXGI_FORMAT;
static const char* DxgiFormatToString(DXGI_FORMAT dxgiFormat)
{
static const char* names[] = {
"DXGI_FORMAT_UNKNOWN",
"DXGI_FORMAT_R32G32B32A32_TYPELESS",
"DXGI_FORMAT_R32G32B32A32_FLOAT",
"DXGI_FORMAT_R32G32B32A32_UINT",
"DXGI_FORMAT_R32G32B32A32_SINT",
"DXGI_FORMAT_R32G32B32_TYPELESS",
"DXGI_FORMAT_R32G32B32_FLOAT",
"DXGI_FORMAT_R32G32B32_UINT",
"DXGI_FORMAT_R32G32B32_SINT",
"DXGI_FORMAT_R16G16B16A16_TYPELESS",
"DXGI_FORMAT_R16G16B16A16_FLOAT",
"DXGI_FORMAT_R16G16B16A16_UNORM",
"DXGI_FORMAT_R16G16B16A16_UINT",
"DXGI_FORMAT_R16G16B16A16_SNORM",
"DXGI_FORMAT_R16G16B16A16_SINT",
"DXGI_FORMAT_R32G32_TYPELESS",
"DXGI_FORMAT_R32G32_FLOAT",
"DXGI_FORMAT_R32G32_UINT",
"DXGI_FORMAT_R32G32_SINT",
"DXGI_FORMAT_R32G8X24_TYPELESS",
"DXGI_FORMAT_D32_FLOAT_S8X24_UINT",
"DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS",
"DXGI_FORMAT_X32_TYPELESS_G8X24_UINT",
"DXGI_FORMAT_R10G10B10A2_TYPELESS",
"DXGI_FORMAT_R10G10B10A2_UNORM",
"DXGI_FORMAT_R10G10B10A2_UINT",
"DXGI_FORMAT_R11G11B10_FLOAT",
"DXGI_FORMAT_R8G8B8A8_TYPELESS",
"DXGI_FORMAT_R8G8B8A8_UNORM",
"DXGI_FORMAT_R8G8B8A8_UNORM_SRGB",
"DXGI_FORMAT_R8G8B8A8_UINT",
"DXGI_FORMAT_R8G8B8A8_SNORM",
"DXGI_FORMAT_R8G8B8A8_SINT",
"DXGI_FORMAT_R16G16_TYPELESS",
"DXGI_FORMAT_R16G16_FLOAT",
"DXGI_FORMAT_R16G16_UNORM",
"DXGI_FORMAT_R16G16_UINT",
"DXGI_FORMAT_R16G16_SNORM",
"DXGI_FORMAT_R16G16_SINT",
"DXGI_FORMAT_R32_TYPELESS",
"DXGI_FORMAT_D32_FLOAT",
"DXGI_FORMAT_R32_FLOAT",
"DXGI_FORMAT_R32_UINT",
"DXGI_FORMAT_R32_SINT",
"DXGI_FORMAT_R24G8_TYPELESS",
"DXGI_FORMAT_D24_UNORM_S8_UINT",
"DXGI_FORMAT_R24_UNORM_X8_TYPELESS",
"DXGI_FORMAT_X24_TYPELESS_G8_UINT",
"DXGI_FORMAT_R8G8_TYPELESS",
"DXGI_FORMAT_R8G8_UNORM",
"DXGI_FORMAT_R8G8_UINT",
"DXGI_FORMAT_R8G8_SNORM",
"DXGI_FORMAT_R8G8_SINT",
"DXGI_FORMAT_R16_TYPELESS",
"DXGI_FORMAT_R16_FLOAT",
"DXGI_FORMAT_D16_UNORM",
"DXGI_FORMAT_R16_UNORM",
"DXGI_FORMAT_R16_UINT",
"DXGI_FORMAT_R16_SNORM",
"DXGI_FORMAT_R16_SINT",
"DXGI_FORMAT_R8_TYPELESS",
"DXGI_FORMAT_R8_UNORM",
"DXGI_FORMAT_R8_UINT",
"DXGI_FORMAT_R8_SNORM",
"DXGI_FORMAT_R8_SINT",
"DXGI_FORMAT_A8_UNORM",
"DXGI_FORMAT_R1_UNORM",
"DXGI_FORMAT_R9G9B9E5_SHAREDEXP",
"DXGI_FORMAT_R8G8_B8G8_UNORM",
"DXGI_FORMAT_G8R8_G8B8_UNORM",
"DXGI_FORMAT_BC1_TYPELESS",
"DXGI_FORMAT_BC1_UNORM",
"DXGI_FORMAT_BC1_UNORM_SRGB",
"DXGI_FORMAT_BC2_TYPELESS",
"DXGI_FORMAT_BC2_UNORM",
"DXGI_FORMAT_BC2_UNORM_SRGB",
"DXGI_FORMAT_BC3_TYPELESS",
"DXGI_FORMAT_BC3_UNORM",
"DXGI_FORMAT_BC3_UNORM_SRGB",
"DXGI_FORMAT_BC4_TYPELESS",
"DXGI_FORMAT_BC4_UNORM",
"DXGI_FORMAT_BC4_SNORM",
"DXGI_FORMAT_BC5_TYPELESS",
"DXGI_FORMAT_BC5_UNORM",
"DXGI_FORMAT_BC5_SNORM",
"DXGI_FORMAT_B5G6R5_UNORM",
"DXGI_FORMAT_B5G5R5A1_UNORM",
"DXGI_FORMAT_B8G8R8A8_UNORM",
"DXGI_FORMAT_B8G8R8X8_UNORM",
"DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM",
"DXGI_FORMAT_B8G8R8A8_TYPELESS",
"DXGI_FORMAT_B8G8R8A8_UNORM_SRGB",
"DXGI_FORMAT_B8G8R8X8_TYPELESS",
"DXGI_FORMAT_B8G8R8X8_UNORM_SRGB",
"DXGI_FORMAT_BC6H_TYPELESS",
"DXGI_FORMAT_BC6H_UF16",
"DXGI_FORMAT_BC6H_SF16",
"DXGI_FORMAT_BC7_TYPELESS",
"DXGI_FORMAT_BC7_UNORM",
"DXGI_FORMAT_BC7_UNORM_SRGB",
"DXGI_FORMAT_AYUV",
"DXGI_FORMAT_Y410",
"DXGI_FORMAT_Y416",
"DXGI_FORMAT_NV12",
"DXGI_FORMAT_P010",
"DXGI_FORMAT_P016",
"DXGI_FORMAT_420_OPAQUE",
"DXGI_FORMAT_YUY2",
"DXGI_FORMAT_Y210",
"DXGI_FORMAT_Y216",
"DXGI_FORMAT_NV11",
"DXGI_FORMAT_AI44",
"DXGI_FORMAT_IA44",
"DXGI_FORMAT_P8",
"DXGI_FORMAT_A8P8",
"DXGI_FORMAT_B4G4R4A4_UNORM",
"DXGI_FORMAT_P208",
"DXGI_FORMAT_V208",
"DXGI_FORMAT_V408",
"DXGI_FORMAT_FORCE_UINT",
};
int index = (int)dxgiFormat;
if (index >= 0 && index < (int)(sizeof(names) / sizeof(names[0])))
return names[index];
return "(Unknown)";
}
typedef enum {
D3D10_RESOURCE_DIMENSION_UNKNOWN,
D3D10_RESOURCE_DIMENSION_BUFFER,
D3D10_RESOURCE_DIMENSION_TEXTURE1D,
D3D10_RESOURCE_DIMENSION_TEXTURE2D,
D3D10_RESOURCE_DIMENSION_TEXTURE3D
} D3D10_RESOURCE_DIMENSION;
static const char* ResourceDimensionToString(D3D10_RESOURCE_DIMENSION resourceDimension)
{
static const char* names[] = {
"D3D10_RESOURCE_DIMENSION_UNKNOWN",
"D3D10_RESOURCE_DIMENSION_BUFFER",
"D3D10_RESOURCE_DIMENSION_TEXTURE1D",
"D3D10_RESOURCE_DIMENSION_TEXTURE2D",
"D3D10_RESOURCE_DIMENSION_TEXTURE3D",
};
int index = (int)resourceDimension;
if (index >= 0 && index < (int)(sizeof(names) / sizeof(names[0])))
return names[index];
return "(Unknown)";
}
typedef enum {
D3D10_RESOURCE_MISC_GENERATE_MIPS,
D3D10_RESOURCE_MISC_SHARED,
D3D10_RESOURCE_MISC_TEXTURECUBE,
D3D10_RESOURCE_MISC_SHARED_KEYEDMUTEX,
D3D10_RESOURCE_MISC_GDI_COMPATIBLE
} D3D10_RESOURCE_MISC_FLAG;
static const char* MiscFlagToString(UINT miscFlag)
{
static const char* names[] = {
"D3D10_RESOURCE_MISC_GENERATE_MIPS",
"D3D10_RESOURCE_MISC_SHARED",
"D3D10_RESOURCE_MISC_TEXTURECUBE",
"D3D10_RESOURCE_MISC_SHARED_KEYEDMUTEX",
"D3D10_RESOURCE_MISC_GDI_COMPATIBLE",
};
int index = (int)miscFlag;
if (index >= 0 && index < (int)(sizeof(names) / sizeof(names[0])))
return names[index];
return "(Unknown)";
}
typedef struct {
DXGI_FORMAT dxgiFormat;
D3D10_RESOURCE_DIMENSION resourceDimension;
UINT miscFlag;
UINT arraySize;
UINT miscFlags2;
} DDS_HEADER_DXT10;
typedef struct {
DWORD dwMagic;
DDS_HEADER header;
DDS_HEADER_DXT10 header10;
} DDS_FILE_HEADER;
DdsFileReader::DdsFileReader(const QString& filename)
: m_filename(filename)
{
}
std::unique_ptr<std::vector<std::unique_ptr<QOpenGLTexture>>> DdsFileReader::createOpenGLTextures()
{
QFile file(m_filename);
if (!file.open(QIODevice::ReadOnly)) {
qDebug() << "Open" << m_filename << "failed";
return nullptr;
}
DDS_FILE_HEADER fileHeader;
if (sizeof(fileHeader) != file.read((char*)&fileHeader, sizeof(fileHeader))) {
qDebug() << "Read DDS file hader failed";
return nullptr;
}
if (0x20534444 != qFromLittleEndian<quint32>(&fileHeader.dwMagic)) {
qDebug() << "Not a DDS file";
return nullptr;
}
if (0x30315844 != qFromLittleEndian<quint32>(&fileHeader.header.ddspf.dwFourCC)) {
qDebug() << "Unsupported DDS file, expected DX10 file";
return nullptr;
}
auto caps2 = qFromLittleEndian<quint32>(&fileHeader.header.dwCaps2);
if (!(DDSCAPS2_CUBEMAP & caps2)) {
qDebug() << "Unsupported DDS file, expected CUBEMAP file";
return nullptr;
}
//qDebug() << "Start anyalize DDS file...";
int width = qFromLittleEndian<quint32>(&fileHeader.header.dwWidth);
int height = qFromLittleEndian<quint32>(&fileHeader.header.dwHeight);
//qDebug() << "DDS size:" << width << "X" << height;
//auto pitchOrLinearSize = qFromLittleEndian<quint32>(&fileHeader.header.dwPitchOrLinearSize);
//qDebug() << "DDS pitch or linear size:" << pitchOrLinearSize;
auto arraySize = qFromLittleEndian<quint32>(&fileHeader.header10.arraySize);
//qDebug() << "DDS array size:" << arraySize;
auto mipMapCount = qFromLittleEndian<quint32>(&fileHeader.header.dwMipMapCount);
//qDebug() << "DDS mip map count:" << mipMapCount;
DXGI_FORMAT dxgiFormat = (DXGI_FORMAT)qFromLittleEndian<quint32>(&fileHeader.header10.dxgiFormat);
//qDebug() << "DDS dxgi format:" << DxgiFormatToString(dxgiFormat);
//qDebug() << "DDS resource dimension:" << ResourceDimensionToString((D3D10_RESOURCE_DIMENSION)qFromLittleEndian<quint32>(&fileHeader.header10.resourceDimension));
//qDebug() << "DDS misc flag:" << MiscFlagToString((UINT)qFromLittleEndian<quint32>(&fileHeader.header10.miscFlag));
quint32 faces = 0;
if (DDSCAPS2_CUBEMAP_POSITIVEX & caps2) {
//qDebug() << "DDS found +x";
++faces;
}
if (DDSCAPS2_CUBEMAP_NEGATIVEX & caps2) {
//qDebug() << "DDS found -x";
++faces;
}
if (DDSCAPS2_CUBEMAP_POSITIVEY & caps2) {
//qDebug() << "DDS found +y";
++faces;
}
if (DDSCAPS2_CUBEMAP_NEGATIVEY & caps2) {
//qDebug() << "DDS found -y";
++faces;
}
if (DDSCAPS2_CUBEMAP_POSITIVEZ & caps2) {
//qDebug() << "DDS found +z";
++faces;
}
if (DDSCAPS2_CUBEMAP_NEGATIVEZ & caps2) {
//qDebug() << "DDS found -z";
++faces;
}
if (6 != faces) {
qDebug() << "Unsupported DDS file, expected six faces";
return nullptr;
}
if (1 != arraySize) {
qDebug() << "Unsupported DDS file, expected one layer";
return nullptr;
}
if (DXGI_FORMAT_R16G16B16A16_FLOAT != dxgiFormat) {
qDebug() << "Unsupported DDS file, expected dxgi format: DXGI_FORMAT_R16G16B16A16_FLOAT";
return nullptr;
}
int components = 8;
int oneFaceSize = 0;
auto calculateOneFaceSizeAtLevel = [=](int level) {
return qMax(width >> level, 1) * qMax(height >> level, 1) * components;
};
for (quint32 level = 0; level < mipMapCount; ++level) {
oneFaceSize += calculateOneFaceSizeAtLevel(level);
}
int totalSize = arraySize * faces * oneFaceSize;
const QByteArray data = file.read(totalSize);
if (data.size() < totalSize) {
qDebug() << "DDS file invalid, expected total size:" << totalSize << "read size:" << data.size();
return nullptr;
}
int depth = 1;
auto textures = std::make_unique<std::vector<std::unique_ptr<QOpenGLTexture>>>();
textures->resize(6);
uint64_t dataOffset = 0;
for (quint32 layer = 0; layer < arraySize; ++layer) {
for (quint32 face = 0; face < faces; ++face) {
for (quint32 level = 0; level < mipMapCount; ++level) {
if (0 == layer && 0 == level) {
QOpenGLTexture* texture = new QOpenGLTexture(QOpenGLTexture::Target2D);
texture->setMinificationFilter(QOpenGLTexture::NearestMipMapNearest);
texture->setMagnificationFilter(QOpenGLTexture::Nearest);
texture->setFormat(QOpenGLTexture::RGBA16F);
texture->setSize(width, height, depth);
texture->allocateStorage(QOpenGLTexture::RGBA, QOpenGLTexture::Float16);
texture->setData(QOpenGLTexture::RGBA, QOpenGLTexture::Float16, data.constData() + dataOffset);
textures->at(face).reset(texture);
}
dataOffset += calculateOneFaceSizeAtLevel(level);
}
}
}
return std::move(textures);
}
QOpenGLTexture* DdsFileReader::createOpenGLTexture()
{
QFile file(m_filename);
if (!file.open(QIODevice::ReadOnly)) {
qDebug() << "Open" << m_filename << "failed";
return nullptr;
}
DDS_FILE_HEADER fileHeader;
if (sizeof(fileHeader) != file.read((char*)&fileHeader, sizeof(fileHeader))) {
qDebug() << "Read DDS file hader failed";
return nullptr;
}
if (0x20534444 != qFromLittleEndian<quint32>(&fileHeader.dwMagic)) {
qDebug() << "Not a DDS file";
return nullptr;
}
if (0x30315844 != qFromLittleEndian<quint32>(&fileHeader.header.ddspf.dwFourCC)) {
qDebug() << "Unsupported DDS file, expected DX10 file";
return nullptr;
}
auto caps2 = qFromLittleEndian<quint32>(&fileHeader.header.dwCaps2);
if (!(DDSCAPS2_CUBEMAP & caps2)) {
qDebug() << "Unsupported DDS file, expected CUBEMAP file";
return nullptr;
}
//qDebug() << "Start anyalize DDS file...";
int width = qFromLittleEndian<quint32>(&fileHeader.header.dwWidth);
int height = qFromLittleEndian<quint32>(&fileHeader.header.dwHeight);
//qDebug() << "DDS size:" << width << "X" << height;
//auto pitchOrLinearSize = qFromLittleEndian<quint32>(&fileHeader.header.dwPitchOrLinearSize);
//qDebug() << "DDS pitch or linear size:" << pitchOrLinearSize;
auto arraySize = qFromLittleEndian<quint32>(&fileHeader.header10.arraySize);
//qDebug() << "DDS array size:" << arraySize;
auto mipMapCount = qFromLittleEndian<quint32>(&fileHeader.header.dwMipMapCount);
//qDebug() << "DDS mip map count:" << mipMapCount;
DXGI_FORMAT dxgiFormat = (DXGI_FORMAT)qFromLittleEndian<quint32>(&fileHeader.header10.dxgiFormat);
//qDebug() << "DDS dxgi format:" << DxgiFormatToString(dxgiFormat);
//qDebug() << "DDS resource dimension:" << ResourceDimensionToString((D3D10_RESOURCE_DIMENSION)qFromLittleEndian<quint32>(&fileHeader.header10.resourceDimension));
//qDebug() << "DDS misc flag:" << MiscFlagToString((UINT)qFromLittleEndian<quint32>(&fileHeader.header10.miscFlag));
quint32 faces = 0;
if (DDSCAPS2_CUBEMAP_POSITIVEX & caps2) {
//qDebug() << "DDS found +x";
++faces;
}
if (DDSCAPS2_CUBEMAP_NEGATIVEX & caps2) {
//qDebug() << "DDS found -x";
++faces;
}
if (DDSCAPS2_CUBEMAP_POSITIVEY & caps2) {
//qDebug() << "DDS found +y";
++faces;
}
if (DDSCAPS2_CUBEMAP_NEGATIVEY & caps2) {
//qDebug() << "DDS found -y";
++faces;
}
if (DDSCAPS2_CUBEMAP_POSITIVEZ & caps2) {
//qDebug() << "DDS found +z";
++faces;
}
if (DDSCAPS2_CUBEMAP_NEGATIVEZ & caps2) {
//qDebug() << "DDS found -z";
++faces;
}
if (6 != faces) {
qDebug() << "Unsupported DDS file, expected six faces";
return nullptr;
}
if (1 != arraySize) {
qDebug() << "Unsupported DDS file, expected one layer";
return nullptr;
}
if (DXGI_FORMAT_R16G16B16A16_FLOAT != dxgiFormat) {
qDebug() << "Unsupported DDS file, expected dxgi format: DXGI_FORMAT_R16G16B16A16_FLOAT";
return nullptr;
}
int components = 8;
int oneFaceSize = 0;
auto calculateOneFaceSizeAtLevel = [=](int level) {
return qMax(width >> level, 1) * qMax(height >> level, 1) * components;
};
for (quint32 level = 0; level < mipMapCount; ++level) {
oneFaceSize += calculateOneFaceSizeAtLevel(level);
}
int totalSize = arraySize * faces * oneFaceSize;
const QByteArray data = file.read(totalSize);
if (data.size() < totalSize) {
qDebug() << "DDS file invalid, expected total size:" << totalSize << "read size:" << data.size();
return nullptr;
}
int depth = 1;
QOpenGLTexture* texture = new QOpenGLTexture(QOpenGLTexture::TargetCubeMap);
texture->setFormat(QOpenGLTexture::RGBA16F);
texture->setSize(width, height, depth);
texture->setAutoMipMapGenerationEnabled(false);
texture->setMipBaseLevel(0);
texture->setMipMaxLevel(mipMapCount - 1);
texture->setMipLevels(mipMapCount);
if (!texture->create()) {
qDebug() << "QOpenGLTexture::create failed";
delete texture;
return nullptr;
}
texture->allocateStorage();
if (!texture->isStorageAllocated()) {
qDebug() << "QOpenGLTexture::isStorageAllocated false";
delete texture;
return nullptr;
}
uint64_t dataOffset = 0;
for (quint32 layer = 0; layer < arraySize; ++layer) {
for (quint32 face = 0; face < faces; ++face) {
for (quint32 level = 0; level < mipMapCount; ++level) {
QOpenGLPixelTransferOptions uploadOptions;
uploadOptions.setAlignment(1);
texture->setData(level,
layer,
static_cast<QOpenGLTexture::CubeMapFace>(QOpenGLTexture::CubeMapPositiveX + face),
QOpenGLTexture::RGBA,
QOpenGLTexture::Float16,
data.constData() + dataOffset,
&uploadOptions);
dataOffset += calculateOneFaceSizeAtLevel(level);
}
}
}
return texture;
}
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