VertexBuffer::VertexBuffer(RenderContext* rc, const VertexDeclaration& decl,
const BinaryDataStorage& data, BufferDrawType vertexDrawType, const std::string& aName) :
APIObject(aName), _rc(rc), _decl(decl), _drawType(vertexDrawType)
{
GLuint buffer = 0;
glGenBuffers(1, &buffer);
setAPIHandle(buffer);
setData(data.data(), data.dataSize());
}
void Renderer::readFramebufferData(const vec2i& size, TextureFormat format, DataType dataType, BinaryDataStorage& data)
{
ET_ASSERT((8 * data.size()) >= (size.square() * bitsPerPixelForTextureFormat(format, dataType)));
glReadPixels(0, 0, size.x, size.y, textureFormatValue(format), dataTypeValue(dataType), data.data());
checkOpenGLError("glReadPixels");
}
void PVRLoader::loadInfoFromStream(std::istream& stream, TextureDescription& desc)
{
std::istream::off_type offset = stream.tellg();
desc.minimalDataSize = 32;
desc.dataLayout = TextureDataLayout_MipsFirst;
PVRHeader2 header2 = { };
stream.read(reinterpret_cast<char*>(&header2), sizeof(header2));
if (header2.dwPVR == pvrHeader2)
{
PVRLoader::loadInfoFromV2Header(header2, desc);
}
else
{
stream.seekg(offset, std::ios_base::beg);
PVRHeader3 header3 = { };
BinaryDataStorage meta;
stream.read(reinterpret_cast<char*>(&header3), sizeof(header3));
if (header3.version == PVRHeaderV3Version)
{
if (header3.metaDataSize > 0)
{
meta.resize(header3.metaDataSize);
stream.read(meta.binary(), header3.metaDataSize);
}
PVRLoader::loadInfoFromV3Header(header3, meta, desc);
}
else
{
log::error("Unrecognized PVR input stream");
}
}
}
