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#include "drape/vertex_array_buffer.hpp"
#include "drape/glfunctions.hpp"
#include "drape/glextensions_list.hpp"
#include "base/stl_add.hpp"
#include "base/assert.hpp"
namespace dp
{
VertexArrayBuffer::VertexArrayBuffer(uint32_t indexBufferSize, uint32_t dataBufferSize)
: m_VAO(0)
, m_dataBufferSize(dataBufferSize)
, m_program()
{
m_indexBuffer.Reset(new IndexBuffer(indexBufferSize));
}
VertexArrayBuffer::~VertexArrayBuffer()
{
m_indexBuffer.Destroy();
DeleteRange(m_staticBuffers, MasterPointerDeleter());
DeleteRange(m_dynamicBuffers, MasterPointerDeleter());
if (m_VAO != 0)
{
/// Build called only when VertexArrayBuffer fulled and transfer to FrontendRenderer
/// but if user move screen before all geometry readed from MWM we delete VertexArrayBuffer on BackendRenderer
/// in this case m_VAO will be equal a 0
/// also m_VAO == 0 will be on device that not support OES_vertex_array_object extension
GLFunctions::glDeleteVertexArray(m_VAO);
}
}
void VertexArrayBuffer::Preflush()
{
GLFunctions::glBindBuffer(0, gl_const::GLElementArrayBuffer);
GLFunctions::glBindBuffer(0, gl_const::GLArrayBuffer);
}
void VertexArrayBuffer::Render()
{
if (!(m_staticBuffers.empty() && m_dynamicBuffers.empty()))
{
ASSERT(!m_program.IsNull(), ("Somebody not call Build. It's very bad. Very very bad"));
/// if OES_vertex_array_object is supported than all bindings already saved in VAO
/// and we need only bind VAO. In Bind method have ASSERT("bind already called")
if (GLExtensionsList::Instance().IsSupported(GLExtensionsList::VertexArrayObject))
Bind();
else
BindStaticBuffers();
BindDynamicBuffers();
m_indexBuffer->Bind();
GLFunctions::glDrawElements(m_indexBuffer->GetCurrentSize());
}
}
void VertexArrayBuffer::Build(RefPointer<GpuProgram> program)
{
ASSERT(m_VAO == 0 && m_program.IsNull(), ("No-no-no! You can't rebuild VertexArrayBuffer"));
m_program = program;
/// if OES_vertex_array_object not supported, than buffers will be bind on each Render call
if (!GLExtensionsList::Instance().IsSupported(GLExtensionsList::VertexArrayObject))
return;
if (m_staticBuffers.empty())
return;
m_VAO = GLFunctions::glGenVertexArray();
Bind();
BindStaticBuffers();
}
void VertexArrayBuffer::UploadData(BindingInfo const & bindingInfo, void const * data, uint16_t count)
{
RefPointer<DataBuffer> buffer;
if (!bindingInfo.IsDynamic())
buffer = GetOrCreateStaticBuffer(bindingInfo);
else
buffer = GetOrCreateDynamicBuffer(bindingInfo);
buffer->UploadData(data, count);
}
RefPointer<DataBuffer> VertexArrayBuffer::GetOrCreateDynamicBuffer(BindingInfo const & bindingInfo)
{
return GetOrCreateBuffer(bindingInfo, true);
}
RefPointer<DataBuffer> VertexArrayBuffer::GetDynamicBuffer(BindingInfo const & bindingInfo) const
{
return GetBuffer(bindingInfo, true);
}
RefPointer<DataBuffer> VertexArrayBuffer::GetOrCreateStaticBuffer(BindingInfo const & bindingInfo)
{
return GetOrCreateBuffer(bindingInfo, false);
}
RefPointer<DataBuffer> VertexArrayBuffer::GetBuffer(BindingInfo const & bindingInfo, bool isDynamic) const
{
TBuffersMap const * buffers = NULL;
if (isDynamic)
buffers = &m_dynamicBuffers;
else
buffers = &m_staticBuffers;
TBuffersMap::const_iterator it = buffers->find(bindingInfo);
if (it == buffers->end())
return RefPointer<DataBuffer>();
return it->second.GetRefPointer();
}
RefPointer<DataBuffer> VertexArrayBuffer::GetOrCreateBuffer(BindingInfo const & bindingInfo, bool isDynamic)
{
TBuffersMap * buffers = NULL;
if (isDynamic)
buffers = &m_dynamicBuffers;
else
buffers = &m_staticBuffers;
TBuffersMap::iterator it = buffers->find(bindingInfo);
if (it == buffers->end())
{
MasterPointer<DataBuffer> & buffer = (*buffers)[bindingInfo];
buffer.Reset(new DataBuffer(bindingInfo.GetElementSize(), m_dataBufferSize));
return buffer.GetRefPointer();
}
return it->second.GetRefPointer();
}
uint16_t VertexArrayBuffer::GetAvailableIndexCount() const
{
return m_indexBuffer->GetAvailableSize();
}
uint16_t VertexArrayBuffer::GetAvailableVertexCount() const
{
if (m_staticBuffers.empty())
return m_dataBufferSize;
#ifdef DEBUG
TBuffersMap::const_iterator it = m_staticBuffers.begin();
uint16_t prev = it->second->GetAvailableSize();
for (; it != m_staticBuffers.end(); ++it)
ASSERT(prev == it->second->GetAvailableSize(), ());
#endif
return m_staticBuffers.begin()->second->GetAvailableSize();
}
uint16_t VertexArrayBuffer::GetStartIndexValue() const
{
if (m_staticBuffers.empty())
return 0;
#ifdef DEBUG
TBuffersMap::const_iterator it = m_staticBuffers.begin();
uint16_t prev = it->second->GetCurrentSize();
for (; it != m_staticBuffers.end(); ++it)
ASSERT(prev == it->second->GetCurrentSize(), ());
#endif
return m_staticBuffers.begin()->second->GetCurrentSize();
}
uint16_t VertexArrayBuffer::GetDynamicBufferOffset(BindingInfo const & bindingInfo)
{
return GetOrCreateDynamicBuffer(bindingInfo)->GetCurrentSize();
}
bool VertexArrayBuffer::IsFilled() const
{
return GetAvailableIndexCount() < 3 || GetAvailableVertexCount() < 3;
}
void VertexArrayBuffer::UploadIndexes(uint16_t const * data, uint16_t count)
{
ASSERT(count <= m_indexBuffer->GetAvailableSize(), ());
m_indexBuffer->UploadData(data, count);
}
void VertexArrayBuffer::ApplyMutation(RefPointer<IndexBufferMutator> indexMutator,
RefPointer<AttributeBufferMutator> attrMutator)
{
m_indexBuffer->UpdateData(indexMutator->GetIndexes(), indexMutator->GetIndexCount());
typedef AttributeBufferMutator::TMutateData TMutateData;
typedef AttributeBufferMutator::TMutateNodes TMutateNodes;
TMutateData const & data = attrMutator->GetMutateData();
for (TMutateData::const_iterator it = data.begin(); it != data.end(); ++it)
{
RefPointer<DataBuffer> buffer = GetDynamicBuffer(it->first);
ASSERT(!buffer.IsNull(), ());
GPUBufferMapper mapper(buffer);
TMutateNodes const & nodes = it->second;
for (size_t i = 0; i < nodes.size(); ++i)
{
MutateNode const & node = nodes[i];
mapper.UpdateData(node.m_data.GetRaw(), node.m_region.m_offset, node.m_region.m_count);
}
}
}
void VertexArrayBuffer::Bind() const
{
ASSERT(m_VAO != 0, ("You need to call Build method before bind it and render"));
GLFunctions::glBindVertexArray(m_VAO);
}
void VertexArrayBuffer::BindStaticBuffers() const
{
BindBuffers(m_staticBuffers);
}
void VertexArrayBuffer::BindDynamicBuffers() const
{
BindBuffers(m_dynamicBuffers);
}
void VertexArrayBuffer::BindBuffers(TBuffersMap const & buffers) const
{
TBuffersMap::const_iterator it = buffers.begin();
for (; it != buffers.end(); ++it)
{
BindingInfo const & binding = it->first;
RefPointer<DataBuffer> buffer = it->second.GetRefPointer();
buffer->Bind();
for (uint16_t i = 0; i < binding.GetCount(); ++i)
{
BindingDecl const & decl = binding.GetBindingDecl(i);
int8_t attributeLocation = m_program->GetAttributeLocation(decl.m_attributeName);
assert(attributeLocation != -1);
GLFunctions::glEnableVertexAttribute(attributeLocation);
GLFunctions::glVertexAttributePointer(attributeLocation,
decl.m_componentCount,
decl.m_componentType,
false,
decl.m_stride,
decl.m_offset);
}
}
}
} // namespace dp
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