74 lines
3.5 KiB
C
74 lines
3.5 KiB
C
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#ifndef CFONT_H
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#define CFONT_H
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#include "CResource.h"
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#include "CTexture.h"
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#include "model/CVertex.h"
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#include <Common/types.h>
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#include <Core/CToken.h>
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#include <OpenGL/CDynamicVertexBuffer.h>
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#include <OpenGL/CIndexBuffer.h>
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#include <string>
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#include <unordered_map>
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#define CFONT_DEFAULT_SIZE -1
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class CRenderer;
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class CFont : public CResource
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{
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friend class CFontLoader;
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static CDynamicVertexBuffer smGlyphVertices; // This is the vertex buffer used to draw glyphs. It has two attributes - Pos and Tex0. Tex0 should be updated for each glyph.
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static CIndexBuffer smGlyphIndices; // This is the index buffer used to draw glyphs. It uses a triangle strip.
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static bool smBuffersInitialized; // This bool indicates whether the vertex/index buffer have been initialized. Checked at the start of RenderString().
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u32 mUnknown; // Value at offset 0x8. Not sure what this is. Including for experimentation purposes.
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u32 mLineHeight; // Height of each line, in points
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u32 mLineMargin; // Gap between lines, in points - this is added to the line height
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u32 mVerticalOffset; // In points. This is used to reposition glyphs after the per-glyph vertical offset is applied
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u32 mDefaultSize; // In points.
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std::string mFontName; // Self-explanatory
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CTexture *mpFontTexture; // The texture used by this font
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CToken mTextureToken; // Token for the font
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u32 mTextureFormat; // Indicates which layers on the texture are for what - multiple glyph layers or fill/stroke
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struct SGlyph
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{
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u16 Character; // The UTF-16 character that this glyph corresponds to
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CVector2f TexCoords[4]; // The format only lists the min/max X/Y values; tracking absolute coordinates in memory is faster
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s32 LeftPadding; // The amount of padding applied left of this glyph, in points
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s32 RightPadding; // The amount of padding applied right of this glyph, in points
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u32 Width; // The width of the glyph, in points
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u32 Height; // The height of the glyph, in points
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u32 PrintAdvance; // How far the print head advances horizontally after printing this glyph, in points
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u32 BaseOffset; // Vertical offset for this glyph, in points; the font-wide offset is added to this
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u32 KerningIndex; // Index into the kerning table of the first kerning pair for this glyph. -1 if no pairs.
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u8 RGBAChannel; // Fonts can store multiple glyphs in the same space on different RGBA channels. This value corresponds to R, G, B, or A.
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};
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std::unordered_map<u16, SGlyph> mGlyphs;
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struct SKerningPair
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{
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u16 CharacterA; // Left character
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u16 CharacterB; // Right character
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s32 Adjust; // The horizontal offset to apply to CharacterB if this pair is encountered, in points
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};
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std::vector<SKerningPair> mKerningTable; // The kerning table should be laid out in alphabetical order for the indices to work properly
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public:
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CFont();
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~CFont();
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EResType Type();
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CResource* MakeCopy(CResCache *pCopyCache);
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CVector2f RenderString(std::string String, CRenderer *pRenderer, float AspectRatio,
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CVector2f Position = CVector2f(0,0),
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CColor FillColor = CColor::skWhite, CColor StrokeColor = CColor::skBlack,
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u32 FontSize = CFONT_DEFAULT_SIZE);
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private:
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void InitBuffers();
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};
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#endif // CFONT_H
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