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#pragma once
#include "drape/attribute_provider.hpp"
#include "drape/glstate.hpp"
#include "drape/overlay_handle.hpp"
#include "drape/pointers.hpp"
#include "drape/render_bucket.hpp"
#include "drape/vertex_array_buffer.hpp"
#include "base/macros.hpp"
#include "std/map.hpp"
#include "std/function.hpp"
namespace dp
{
class RenderBucket;
class AttributeProvider;
class OverlayHandle;
class Batcher
{
public:
static uint32_t const IndexPerTriangle = 3;
static uint32_t const IndexPerQuad = 6;
static uint32_t const VertexPerQuad = 4;
Batcher(uint32_t indexBufferSize, uint32_t vertexBufferSize);
~Batcher();
void InsertTriangleList(GLState const & state, ref_ptr<AttributeProvider> params);
IndicesRange InsertTriangleList(GLState const & state, ref_ptr<AttributeProvider> params,
drape_ptr<OverlayHandle> && handle);
void InsertTriangleStrip(GLState const & state, ref_ptr<AttributeProvider> params);
IndicesRange InsertTriangleStrip(GLState const & state, ref_ptr<AttributeProvider> params,
drape_ptr<OverlayHandle> && handle);
void InsertTriangleFan(GLState const & state, ref_ptr<AttributeProvider> params);
IndicesRange InsertTriangleFan(GLState const & state, ref_ptr<AttributeProvider> params,
drape_ptr<OverlayHandle> && handle);
void InsertListOfStrip(GLState const & state, ref_ptr<AttributeProvider> params, uint8_t vertexStride);
IndicesRange InsertListOfStrip(GLState const & state, ref_ptr<AttributeProvider> params,
drape_ptr<OverlayHandle> && handle, uint8_t vertexStride);
typedef function<void (GLState const &, drape_ptr<RenderBucket> &&)> TFlushFn;
void StartSession(TFlushFn const & flusher);
void EndSession();
void SetFeatureMinZoom(int minZoom);
private:
template<typename TBacher>
IndicesRange InsertTriangles(GLState const & state, ref_ptr<AttributeProvider> params,
drape_ptr<OverlayHandle> && handle, uint8_t vertexStride = 0);
class CallbacksWrapper;
void ChangeBuffer(ref_ptr<CallbacksWrapper> wrapper);
ref_ptr<RenderBucket> GetBucket(GLState const & state);
void FinalizeBucket(GLState const & state);
void Flush();
private:
TFlushFn m_flushInterface;
private:
using TBuckets = map<GLState, drape_ptr<RenderBucket>>;
TBuckets m_buckets;
uint32_t m_indexBufferSize;
uint32_t m_vertexBufferSize;
int m_featureMinZoom = 0;
};
class BatcherFactory
{
public:
Batcher * GetNew() const;
};
class SessionGuard
{
public:
SessionGuard(Batcher & batcher, Batcher::TFlushFn const & flusher);
~SessionGuard();
DISALLOW_COPY_AND_MOVE(SessionGuard);
private:
Batcher & m_batcher;
};
} // namespace dp
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