102 lines
2.9 KiB
C++
102 lines
2.9 KiB
C++
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#pragma once
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#include "drape/dynamic_texture.hpp"
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#include "drape/glyph_manager.hpp"
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#include "drape/pointers.hpp"
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#include <map>
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#include <mutex>
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#include <utility> // std::tie
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#include <vector>
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namespace dp
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{
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class GlyphPacker
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{
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public:
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explicit GlyphPacker(m2::PointU const & size);
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bool PackGlyph(uint32_t width, uint32_t height, m2::RectU & rect);
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bool CanBePacked(uint32_t glyphsCount, uint32_t width, uint32_t height) const;
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m2::RectF MapTextureCoords(m2::RectU const & pixelRect) const;
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bool IsFull() const;
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m2::PointU const & GetSize() const { return m_size; }
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private:
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m2::PointU m_size = m2::PointU(0, 0);
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m2::PointU m_cursor = m2::PointU(0, 0);
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uint32_t m_yStep = 0;
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bool m_isFull = false;
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};
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class GlyphKey
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: public GlyphFontAndId
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, public Texture::Key
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{
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public:
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Texture::ResourceType GetType() const override { return Texture::ResourceType::Glyph; }
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};
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// TODO(AB): Make Texture::ResourceInfo non-abstract and use it here directly.
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class GlyphInfo : public Texture::ResourceInfo
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{
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public:
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explicit GlyphInfo(m2::RectF const & texRect) : ResourceInfo(texRect) {}
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Texture::ResourceType GetType() const override { return Texture::ResourceType::Glyph; }
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};
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class GlyphIndex
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{
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public:
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GlyphIndex(m2::PointU const & size, ref_ptr<GlyphManager> mng);
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~GlyphIndex();
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// This function can return nullptr.
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ref_ptr<Texture::ResourceInfo> MapResource(GlyphFontAndId const & key, bool & newResource);
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std::vector<ref_ptr<Texture::ResourceInfo>> MapResources(TGlyphs const & keys, bool & hasNewResources);
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void UploadResources(ref_ptr<dp::GraphicsContext> context, ref_ptr<Texture> texture);
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bool CanBeGlyphPacked(uint32_t glyphsCount) const;
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// ONLY for unit-tests. DO NOT use this function anywhere else.
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size_t GetPendingNodesCount();
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private:
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GlyphPacker m_packer;
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ref_ptr<GlyphManager> m_mng;
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using ResourceMapping = std::map<GlyphFontAndId, GlyphInfo>;
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using PendingNode = std::pair<m2::RectU, Glyph>;
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using PendingNodes = std::vector<PendingNode>;
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ResourceMapping m_index;
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PendingNodes m_pendingNodes;
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std::mutex m_mutex;
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};
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class FontTexture : public DynamicTexture<GlyphIndex, GlyphKey, Texture::ResourceType::Glyph>
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{
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public:
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FontTexture(m2::PointU const & size, ref_ptr<GlyphManager> glyphMng, ref_ptr<HWTextureAllocator> allocator)
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: m_index(size, glyphMng)
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{
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DynamicTextureParams const params{size, TextureFormat::Red, TextureFilter::Linear, true /* m_usePixelBuffer */};
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Init(allocator, make_ref(&m_index), params);
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}
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~FontTexture() override { Reset(); }
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ref_ptr<ResourceInfo> MapResource(GlyphFontAndId const & key, bool & hasNewResources) const
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{
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ASSERT(m_indexer != nullptr, ());
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return m_indexer->MapResource(key, hasNewResources);
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}
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bool HasEnoughSpace(uint32_t newKeysCount) const override { return m_index.CanBeGlyphPacked(newKeysCount); }
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private:
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GlyphIndex m_index;
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};
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} // namespace dp
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