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Load iwis of version 6 (cod4)

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Jan
2021-04-02 18:15:33 +02:00
parent 8fbda2d1bb
commit 05303313be
3 changed files with 154 additions and 0 deletions
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103
src/ObjLoading/Image/IwiLoader.cpp
View File

@ -10,6 +10,106 @@ IwiLoader::IwiLoader(MemoryManager* memoryManager)
m_memory_manager = memoryManager;
}
const ImageFormat* IwiLoader::GetFormat6(int8_t format)
{
switch (static_cast<iwi6::IwiFormat>(format))
{
case iwi6::IwiFormat::IMG_FORMAT_BITMAP_RGBA:
return &ImageFormat::FORMAT_R8_G8_B8_A8;
case iwi6::IwiFormat::IMG_FORMAT_BITMAP_RGB:
return &ImageFormat::FORMAT_R8_G8_B8;
case iwi6::IwiFormat::IMG_FORMAT_BITMAP_ALPHA:
return &ImageFormat::FORMAT_A8;
case iwi6::IwiFormat::IMG_FORMAT_DXT1:
return &ImageFormat::FORMAT_BC1;
case iwi6::IwiFormat::IMG_FORMAT_DXT3:
return &ImageFormat::FORMAT_BC2;
case iwi6::IwiFormat::IMG_FORMAT_DXT5:
return &ImageFormat::FORMAT_BC3;
case iwi6::IwiFormat::IMG_FORMAT_DXN:
return &ImageFormat::FORMAT_BC5;
case iwi6::IwiFormat::IMG_FORMAT_BITMAP_LUMINANCE_ALPHA:
return &ImageFormat::FORMAT_R8_A8;
case iwi6::IwiFormat::IMG_FORMAT_BITMAP_LUMINANCE:
return &ImageFormat::FORMAT_R8;
case iwi6::IwiFormat::IMG_FORMAT_WAVELET_RGBA: // used
case iwi6::IwiFormat::IMG_FORMAT_WAVELET_RGB: // used
case iwi6::IwiFormat::IMG_FORMAT_WAVELET_LUMINANCE_ALPHA:
case iwi6::IwiFormat::IMG_FORMAT_WAVELET_LUMINANCE:
case iwi6::IwiFormat::IMG_FORMAT_WAVELET_ALPHA:
printf("Unsupported IWI format: %i\n", format);
break;
default:
printf("Unknown IWI format: %i\n", format);
break;
}
return nullptr;
}
Texture* IwiLoader::LoadIwi6(std::istream& stream) const
{
iwi6::IwiHeader header{};
stream.read(reinterpret_cast<char*>(&header), sizeof(header));
if (stream.gcount() != sizeof(header))
return nullptr;
const auto* format = GetFormat6(header.format);
if (format == nullptr)
return nullptr;
auto width = header.dimensions[0];
auto height = header.dimensions[1];
auto depth = header.dimensions[2];
auto hasMipMaps = !(header.flags & iwi6::IwiFlags::IMG_FLAG_NOMIPMAPS);
Texture* texture;
if (header.flags & iwi6::IwiFlags::IMG_FLAG_CUBEMAP)
{
texture = m_memory_manager->Create<TextureCube>(format, width, height, hasMipMaps);
}
else if (header.flags & iwi6::IwiFlags::IMG_FLAG_VOLMAP)
{
texture = m_memory_manager->Create<Texture3D>(format, width, height, depth, hasMipMaps);
}
else
{
texture = m_memory_manager->Create<Texture2D>(format, width, height, hasMipMaps);
}
texture->Allocate();
auto currentFileSize = sizeof(iwi6::IwiHeader) + sizeof(IwiVersion);
const auto mipMapCount = hasMipMaps ? texture->GetMipMapCount() : 1;
for (auto currentMipLevel = mipMapCount - 1; currentMipLevel >= 0; currentMipLevel--)
{
const auto sizeOfMipLevel = texture->GetSizeOfMipLevel(currentMipLevel) * texture->GetFaceCount();
currentFileSize += sizeOfMipLevel;
if (currentMipLevel < static_cast<int>(std::extent<decltype(iwi6::IwiHeader::fileSizeForPicmip)>::value)
&& currentFileSize != header.fileSizeForPicmip[currentMipLevel])
{
printf("Iwi has invalid file size for picmip %i\n", currentMipLevel);
m_memory_manager->Delete(texture);
return nullptr;
}
stream.read(reinterpret_cast<char*>(texture->GetBufferForMipLevel(currentMipLevel)), sizeOfMipLevel);
if (stream.gcount() != sizeOfMipLevel)
{
printf("Unexpected eof of iwi in mip level %i\n", currentMipLevel);
m_memory_manager->Delete(texture);
return nullptr;
}
}
return texture;
}
const ImageFormat* IwiLoader::GetFormat8(int8_t format)
{
switch (static_cast<iwi8::IwiFormat>(format))
@ -252,6 +352,9 @@ Texture* IwiLoader::LoadIwi(std::istream& stream)
switch (iwiVersion.version)
{
case 6:
return LoadIwi6(stream);
case 8:
return LoadIwi8(stream);

3
src/ObjLoading/Image/IwiLoader.h
View File

@ -8,6 +8,9 @@ class IwiLoader
{
MemoryManager* m_memory_manager;
static const ImageFormat* GetFormat6(int8_t format);
Texture* LoadIwi6(std::istream& stream) const;
static const ImageFormat* GetFormat8(int8_t format);
Texture* LoadIwi8(std::istream& stream) const;