mirror of
https://github.com/love2d/love.git
synced 2026-08-16 00:02:12 +02:00
Sasha Szpakowski
157 lines
4.1 KiB
C++
157 lines
4.1 KiB
C++
/**
|
|
* Copyright (c) 2006-2023 LOVE Development Team
|
|
*
|
|
* This software is provided 'as-is', without any express or implied
|
|
* warranty. In no event will the authors be held liable for any damages
|
|
* arising from the use of this software.
|
|
*
|
|
* Permission is granted to anyone to use this software for any purpose,
|
|
* including commercial applications, and to alter it and redistribute it
|
|
* freely, subject to the following restrictions:
|
|
*
|
|
* 1. The origin of this software must not be misrepresented; you must not
|
|
* claim that you wrote the original software. If you use this software
|
|
* in a product, an acknowledgment in the product documentation would be
|
|
* appreciated but is not required.
|
|
* 2. Altered source versions must be plainly marked as such, and must not be
|
|
* misrepresented as being the original software.
|
|
* 3. This notice may not be removed or altered from any source distribution.
|
|
**/
|
|
|
|
#pragma once
|
|
|
|
// LOVE
|
|
#include "common/Object.h"
|
|
#include "common/Vector.h"
|
|
#include "common/int.h"
|
|
#include "common/Color.h"
|
|
#include "common/Range.h"
|
|
|
|
#include <vector>
|
|
#include <string>
|
|
#include <unordered_map>
|
|
|
|
namespace love
|
|
{
|
|
namespace font
|
|
{
|
|
|
|
class Rasterizer;
|
|
|
|
struct ColoredString
|
|
{
|
|
std::string str;
|
|
Colorf color;
|
|
};
|
|
|
|
struct IndexedColor
|
|
{
|
|
Colorf color;
|
|
int index;
|
|
};
|
|
|
|
struct ColoredCodepoints
|
|
{
|
|
std::vector<uint32> cps;
|
|
std::vector<IndexedColor> colors;
|
|
};
|
|
|
|
void getCodepointsFromString(const std::string &str, std::vector<uint32> &codepoints);
|
|
void getCodepointsFromString(const std::vector<ColoredString> &strs, ColoredCodepoints &codepoints);
|
|
|
|
class TextShaper : public Object
|
|
{
|
|
public:
|
|
|
|
struct GlyphIndex
|
|
{
|
|
int index;
|
|
int rasterizerIndex;
|
|
};
|
|
|
|
struct GlyphPosition
|
|
{
|
|
Vector2 position;
|
|
GlyphIndex glyphIndex;
|
|
};
|
|
|
|
struct TextInfo
|
|
{
|
|
int width;
|
|
int height;
|
|
};
|
|
|
|
// This will be used if the Rasterizer doesn't have a tab character itself.
|
|
static const int SPACES_PER_TAB = 4;
|
|
|
|
static love::Type type;
|
|
|
|
virtual ~TextShaper();
|
|
|
|
const std::vector<StrongRef<Rasterizer>> &getRasterizers() const { return rasterizers; }
|
|
bool isUsingSpacesForTab() const { return useSpacesForTab; }
|
|
|
|
float getHeight() const;
|
|
|
|
/**
|
|
* Sets the line height (which should be a number to multiply the font size by,
|
|
* example: line height = 1.2 and size = 12 means that rendered line height = 12*1.2)
|
|
* @param height The new line height.
|
|
**/
|
|
void setLineHeight(float height);
|
|
|
|
/**
|
|
* Returns the line height.
|
|
**/
|
|
float getLineHeight() const;
|
|
|
|
// Extra font metrics
|
|
int getAscent() const;
|
|
int getDescent() const;
|
|
float getBaseline() const;
|
|
|
|
bool hasGlyph(uint32 glyph) const;
|
|
bool hasGlyphs(const std::string &text) const;
|
|
|
|
float getKerning(uint32 leftglyph, uint32 rightglyph);
|
|
float getKerning(const std::string &leftchar, const std::string &rightchar);
|
|
|
|
int getGlyphAdvance(uint32 glyph, GlyphIndex *glyphindex = nullptr);
|
|
|
|
int getWidth(const std::string &str);
|
|
|
|
void getWrap(const std::vector<ColoredString> &text, float wraplimit, std::vector<std::string> &lines, std::vector<int> *linewidths = nullptr);
|
|
void getWrap(const ColoredCodepoints &codepoints, float wraplimit, std::vector<Range> &lineranges, std::vector<int> *linewidths = nullptr);
|
|
|
|
virtual void setFallbacks(const std::vector<Rasterizer *> &fallbacks);
|
|
|
|
virtual void computeGlyphPositions(const ColoredCodepoints &codepoints, Range range, Vector2 offset, float extraspacing, std::vector<GlyphPosition> *positions, std::vector<IndexedColor> *colors, TextInfo *info) = 0;
|
|
virtual int computeWordWrapIndex(const ColoredCodepoints &codepoints, Range range, float wraplimit, float *width) = 0;
|
|
|
|
protected:
|
|
|
|
TextShaper(Rasterizer *rasterizer);
|
|
|
|
static inline bool isWhitespace(uint32 codepoint) { return codepoint == ' ' || codepoint == '\t'; }
|
|
|
|
std::vector<StrongRef<Rasterizer>> rasterizers;
|
|
std::vector<float> dpiScales;
|
|
|
|
private:
|
|
|
|
int height;
|
|
float lineHeight;
|
|
|
|
bool useSpacesForTab;
|
|
|
|
// maps glyphs to advance and glyph+rasterizer index.
|
|
std::unordered_map<uint32, std::pair<int, GlyphIndex>> glyphAdvances;
|
|
|
|
// map of left/right glyph pairs to horizontal kerning.
|
|
std::unordered_map<uint64, float> kerning;
|
|
|
|
}; // TextShaper
|
|
|
|
} // font
|
|
} // love
|