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#include "drape/glextensions_list.hpp"
#include "drape/glfunctions.hpp"
#include "base/assert.hpp"
#include "std/target_os.hpp"
namespace dp
{
GLExtensionsList::GLExtensionsList(dp::ApiVersion apiVersion)
{
#if defined(OMIM_OS_MOBILE)
CheckExtension(TextureNPOT, "GL_OES_texture_npot");
if (apiVersion == dp::ApiVersion::OpenGLES2)
{
#ifdef OMIM_OS_ANDROID
SetExtension(VertexArrayObject, false);
#else
CheckExtension(VertexArrayObject, "GL_OES_vertex_array_object");
#endif
CheckExtension(MapBuffer, "GL_OES_mapbuffer");
CheckExtension(UintIndices, "GL_OES_element_index_uint");
CheckExtension(MapBufferRange, "GL_EXT_map_buffer_range");
}
else
{
SetExtension(VertexArrayObject, true);
SetExtension(MapBuffer, true);
SetExtension(MapBufferRange, true);
SetExtension(UintIndices, true);
}
#elif defined(OMIM_OS_WINDOWS)
m_impl->CheckExtension(TextureNPOT, "GL_ARB_texture_non_power_of_two");
SetExtension(MapBuffer, true);
SetExtension(UintIndices, true);
if (apiVersion == dp::ApiVersion::OpenGLES2)
{
SetExtension(VertexArrayObject, false);
SetExtension(MapBufferRange, false);
}
else
{
SetExtension(VertexArrayObject, true);
SetExtension(MapBufferRange, true);
}
#else
CheckExtension(TextureNPOT, "GL_ARB_texture_non_power_of_two");
SetExtension(MapBuffer, true);
SetExtension(UintIndices, true);
if (apiVersion == dp::ApiVersion::OpenGLES2)
{
CheckExtension(VertexArrayObject, "GL_APPLE_vertex_array_object");
SetExtension(MapBufferRange, false);
}
else
{
SetExtension(VertexArrayObject, true);
SetExtension(MapBufferRange, true);
}
#endif
}
// static
GLExtensionsList & GLExtensionsList::Instance()
{
static GLExtensionsList extList(GLFunctions::CurrentApiVersion);
return extList;
}
bool GLExtensionsList::IsSupported(ExtensionName extName) const
{
auto const it = m_supportedMap.find(extName);
if (it != m_supportedMap.end())
return it->second;
ASSERT(false, ("Not all used extensions are checked"));
return false;
}
void GLExtensionsList::CheckExtension(ExtensionName enumName, std::string const & extName)
{
m_supportedMap[enumName] = GLFunctions::glHasExtension(extName);
}
void GLExtensionsList::SetExtension(ExtensionName enumName, bool isSupported)
{
m_supportedMap[enumName] = isSupported;
}
} // namespace dp
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