drape basics

1 files changed, 92 insertions, 0 deletions

diff --git a/drape/attribute_provider.cpp b/drape/attribute_provider.cpp
new file mode 100644
index 0000000000..cdb2256e3c
--- /dev/null
+++ b/drape/attribute_provider.cpp
@@ -0,0 +1,92 @@
+#include "attribute_provider.hpp"
+#include "../base/assert.hpp"
+
+#ifdef DEBUG
+  #define INIT_CHECK_INFO(x) m_checkInfo = vector<bool>((vector<bool>::size_type)(x), false);
+  #define CHECK_STREAMS CheckStreams()
+  #define INIT_STREAM(x) InitStream((x))
+#else
+  #include "macros.hpp"
+  #define INIT_CHECK_INFO(x) UNUSED_VALUE((x))
+  #define CHECK_STREAMS
+  #define INIT_STREAM(x) UNUSED_VALUE((x))
+#endif
+
+AttributeProvider::AttributeProvider(uint8_t streamCount, uint16_t vertexCount)
+  : m_vertexCount(vertexCount)
+{
+  m_streams.resize(streamCount);
+  INIT_CHECK_INFO(streamCount);
+}
+
+/// interface for batcher
+bool AttributeProvider::IsDataExists() const
+{
+  CHECK_STREAMS;
+  return m_vertexCount > 0;
+}
+
+uint16_t AttributeProvider::GetVertexCount() const
+{
+  CHECK_STREAMS;
+  return m_vertexCount;
+}
+
+uint8_t AttributeProvider::GetStreamCount() const
+{
+  return m_streams.size();
+}
+
+const void * AttributeProvider::GetRawPointer(uint8_t streamIndex)
+{
+  ASSERT(streamIndex < GetStreamCount(), ("Stream index = ", streamIndex, " out of range [0 : ", GetStreamCount(), ")"));
+  CHECK_STREAMS;
+  return m_streams[streamIndex].m_data.GetRaw();
+}
+
+const BindingInfo & AttributeProvider::GetBindingInfo(uint8_t streamIndex) const
+{
+  ASSERT(streamIndex < GetStreamCount(), ("Stream index = ", streamIndex, " out of range [0 : ", GetStreamCount(), ")"));
+  CHECK_STREAMS;
+  return m_streams[streamIndex].m_binding;
+}
+
+void AttributeProvider::Advance(uint16_t vertexCount)
+{
+  assert(m_vertexCount >= vertexCount);
+  CHECK_STREAMS;
+  for (size_t i = 0; i < GetStreamCount(); ++i)
+  {
+    const BindingInfo & info = m_streams[i].m_binding;
+    uint32_t offset = vertexCount * info.GetElementSize();
+    void * rawPointer = m_streams[i].m_data.GetRaw();
+    m_streams[i].m_data = WeakPointer<void>((void *)(((uint8_t *)rawPointer) + offset));
+  }
+
+  m_vertexCount -= vertexCount;
+}
+
+void AttributeProvider::InitStream(uint8_t streamIndex,
+                                   const BindingInfo &bindingInfo,
+                                   WeakPointer<void> data)
+{
+  ASSERT(streamIndex < GetStreamCount(), ("Stream index = ", streamIndex, " out of range [0 : ", GetStreamCount(), ")"));
+  AttributeStream s;
+  s.m_binding = bindingInfo;
+  s.m_data = data;
+  m_streams[streamIndex] = s;
+  INIT_STREAM(streamIndex);
+}
+
+#ifdef DEBUG
+void AttributeProvider::CheckStreams() const
+{
+  ASSERT(std::find(m_checkInfo.begin(), m_checkInfo.end(), false) == m_checkInfo.end(),
+         ("Not all streams initialized"));
+}
+
+void AttributeProvider::InitStream(uint8_t streamIndex)
+{
+  m_checkInfo[streamIndex] = true;
+}
+#endif