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#pragma once
#include "drape/pointers.hpp"
#include "drape/texture.hpp"
#include "drape/glyph_manager.hpp"
#include "drape/dynamic_texture.hpp"
#include "std/atomic.hpp"
#include "std/condition_variable.hpp"
#include "std/list.hpp"
#include "std/map.hpp"
#include "std/vector.hpp"
#include "std/string.hpp"
#include "std/thread.hpp"
namespace dp
{
class GlyphPacker
{
public:
GlyphPacker(m2::PointU const & size);
bool PackGlyph(uint32_t width, uint32_t height, m2::RectU & rect);
bool CanBePacked(uint32_t glyphsCount, uint32_t width, uint32_t height) const;
m2::RectF MapTextureCoords(m2::RectU const & pixelRect) const;
bool IsFull() const;
private:
m2::PointU m_size = m2::PointU(0, 0);
m2::PointU m_cursor = m2::PointU(0, 0);
uint32_t m_yStep = 0;
bool m_isFull = false;
};
class GlyphKey : public Texture::Key
{
public:
GlyphKey(strings::UniChar unicodePoint) : m_unicodePoint(unicodePoint) {}
Texture::ResourceType GetType() const { return Texture::Glyph; }
strings::UniChar GetUnicodePoint() const { return m_unicodePoint; }
private:
strings::UniChar m_unicodePoint;
};
class GlyphInfo : public Texture::ResourceInfo
{
typedef Texture::ResourceInfo TBase;
public:
GlyphInfo(m2::RectF const & texRect, GlyphManager::GlyphMetrics const & metrics)
: TBase(texRect)
, m_metrics(metrics)
{}
virtual Texture::ResourceType GetType() const { return Texture::Glyph; }
GlyphManager::GlyphMetrics const & GetMetrics() const { return m_metrics; }
private:
GlyphManager::GlyphMetrics m_metrics;
};
class GlyphGenerator
{
public:
using TCompletionHandler = function<void(m2::RectU const &, GlyphManager::Glyph const &)>;
struct GlyphGenerationData
{
m2::RectU m_rect;
GlyphManager::Glyph m_glyph;
GlyphGenerationData(m2::RectU const & rect, GlyphManager::Glyph const & glyph)
: m_rect(rect), m_glyph(glyph)
{}
};
GlyphGenerator(ref_ptr<GlyphManager> mng, TCompletionHandler const & completionHandler);
~GlyphGenerator();
void GenerateGlyph(m2::RectU const & rect, GlyphManager::Glyph const & glyph);
bool IsSuspended() const;
private:
static void Routine(GlyphGenerator * generator);
void WaitForGlyph(list<GlyphGenerationData> & queue);
ref_ptr<GlyphManager> m_mng;
TCompletionHandler m_completionHandler;
list<GlyphGenerationData> m_queue;
mutable mutex m_queueLock;
atomic<bool> m_isRunning;
condition_variable m_condition;
bool m_isSuspended;
thread m_thread;
};
class GlyphIndex
{
public:
GlyphIndex(m2::PointU size, ref_ptr<GlyphManager> mng);
~GlyphIndex();
// This function can return nullptr.
ref_ptr<Texture::ResourceInfo> MapResource(GlyphKey const & key, bool & newResource);
void UploadResources(ref_ptr<Texture> texture);
bool CanBeGlyphPacked(uint32_t glyphsCount) const;
bool HasAsyncRoutines() const;
uint32_t GetAbsentGlyphsCount(strings::UniString const & text) const;
// ONLY for unit-tests. DO NOT use this function anywhere else.
size_t GetPendingNodesCount();
private:
void OnGlyphGenerationCompletion(m2::RectU const & rect, GlyphManager::Glyph const & glyph);
GlyphPacker m_packer;
ref_ptr<GlyphManager> m_mng;
unique_ptr<GlyphGenerator> m_generator;
typedef map<strings::UniChar, GlyphInfo> TResourceMapping;
typedef pair<m2::RectU, GlyphManager::Glyph> TPendingNode;
typedef vector<TPendingNode> TPendingNodes;
TResourceMapping m_index;
TPendingNodes m_pendingNodes;
threads::Mutex m_lock;
};
class FontTexture : public DynamicTexture<GlyphIndex, GlyphKey, Texture::Glyph>
{
typedef DynamicTexture<GlyphIndex, GlyphKey, Texture::Glyph> TBase;
public:
FontTexture(m2::PointU const & size, ref_ptr<GlyphManager> glyphMng, ref_ptr<HWTextureAllocator> allocator)
: m_index(size, glyphMng)
{
TBase::TextureParams params;
params.m_size = size;
params.m_format = TextureFormat::ALPHA;
params.m_filter = gl_const::GLLinear;
vector<uint8_t> initData(params.m_size.x * params.m_size.y, 0);
TBase::Init(allocator, make_ref(&m_index), params, make_ref(initData.data()));
}
~FontTexture() { TBase::Reset(); }
bool HasEnoughSpace(uint32_t newKeysCount) const override
{
return m_index.CanBeGlyphPacked(newKeysCount);
}
bool HasAsyncRoutines() const override
{
return m_index.HasAsyncRoutines();
}
uint32_t GetAbsentGlyphsCount(strings::UniString const & text) const
{
return m_index.GetAbsentGlyphsCount(text);
}
private:
GlyphIndex m_index;
};
}
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