mirror of
https://github.com/ciphervance/supercell-wx.git
synced 2025-11-04 02:30:06 +00:00
377 lines
9.5 KiB
C++
377 lines
9.5 KiB
C++
// No suitable standard C++ replacement
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#define _SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING
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#include <scwx/qt/util/font.hpp>
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#include <codecvt>
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#include <unordered_map>
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#include <boost/log/trivial.hpp>
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#include <boost/timer/timer.hpp>
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#include <QFile>
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#include <QFileInfo>
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_SFNT_NAMES_H
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#include FT_TRUETYPE_IDS_H
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// #include <freetype-gl.h> (exclude opengl.h)
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#include <platform.h>
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#include <vec234.h>
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#include <vector.h>
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#include <texture-atlas.h>
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#include <texture-font.h>
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#include <ftgl-utils.h>
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#ifdef WIN32
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# include <WinSock2.h>
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#else
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# include <arpa/inet.h>
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#endif
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namespace scwx
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{
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namespace qt
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{
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namespace util
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{
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struct TextureGlyph
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{
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int offsetX_;
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int offsetY_;
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int width_;
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int height_;
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float s0_;
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float t0_;
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float s1_;
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float t1_;
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float advanceX_;
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TextureGlyph(int offsetX,
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int offsetY,
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int width,
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int height,
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float s0,
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float t0,
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float s1,
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float t1,
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float advanceX) :
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offsetX_ {offsetX},
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offsetY_ {offsetY},
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width_ {width},
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height_ {height},
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s0_ {s0},
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t0_ {t0},
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s1_ {s1},
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t1_ {t1},
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advanceX_ {advanceX}
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{
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}
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};
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static const std::string CODEPOINTS =
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" !\"#$%&'()*+,-./0123456789:;<=>?"
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"@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"
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"`abcdefghijklmnopqrstuvwxyz{|}~";
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static const std::string logPrefix_ = "[scwx::qt::util::font] ";
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static constexpr float BASE_POINT_SIZE = 72.0f;
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static constexpr float POINT_SCALE = 1.0f / BASE_POINT_SIZE;
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static std::unordered_map<std::string, std::shared_ptr<Font>> fontMap_;
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static void ParseSfntName(const FT_SfntName& sfntName, std::string& str);
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class FontImpl
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{
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public:
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explicit FontImpl(const std::string& resource) :
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resource_(resource), atlas_ {nullptr}
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{
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}
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~FontImpl()
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{
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if (atlas_ != nullptr)
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{
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ftgl::texture_atlas_delete(atlas_);
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}
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}
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void ParseNames(FT_Face face);
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const std::string resource_;
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struct
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{
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std::string fontFamily_;
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std::string fontSubfamily_;
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} fontData_;
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ftgl::texture_atlas_t* atlas_;
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std::unordered_map<char, TextureGlyph> glyphs_;
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};
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Font::Font(const std::string& resource) :
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p(std::make_unique<FontImpl>(resource))
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{
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}
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Font::~Font() = default;
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float Font::BufferText(std::shared_ptr<FontBuffer> buffer,
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const std::string& text,
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float x,
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float y,
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float pointSize,
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boost::gil::rgba8_pixel_t color) const
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{
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static constexpr float colorScale = 1.0f / 255.0f;
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const float scale = pointSize * POINT_SCALE;
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float r = color[0] * colorScale;
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float g = color[1] * colorScale;
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float b = color[2] * colorScale;
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float a = color[3] * colorScale;
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for (size_t i = 0; i < text.length(); ++i)
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{
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const char& c = text[i];
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auto it = p->glyphs_.find(c);
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if (it == p->glyphs_.end())
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{
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BOOST_LOG_TRIVIAL(info)
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<< logPrefix_
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<< "Could not draw character: " << static_cast<uint32_t>(c);
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continue;
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}
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TextureGlyph& glyph = it->second;
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if (i > 0)
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{
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x += Kerning(text[i - 1], c) * scale;
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}
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float x0 = x + glyph.offsetX_ * scale;
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float y0 = y + glyph.offsetY_ * scale;
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float x1 = x0 + glyph.width_ * scale;
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float y1 = y0 - glyph.height_ * scale;
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float s0 = glyph.s0_;
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float t0 = glyph.t0_;
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float s1 = glyph.s1_;
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float t1 = glyph.t1_;
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buffer->Push(/* Indices */ {0, 1, 2, 0, 2, 3}, //
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/* Vertices */ {x0, y0, 0, s0, t0, r, g, b, a, //
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x0, y1, 0, s0, t1, r, g, b, a, //
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x1, y1, 0, s1, t1, r, g, b, a, //
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x1, y0, 0, s1, t0, r, g, b, a});
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x += glyph.advanceX_ * scale;
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}
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return x;
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}
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float Font::Kerning(char c1, char c2) const
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{
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// TODO
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return 0.0f;
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}
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float Font::TextLength(const std::string& text, float pointSize) const
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{
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const float scale = pointSize * POINT_SCALE;
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float x = 0.0f;
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for (size_t i = 0; i < text.length(); ++i)
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{
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const char& c = text[i];
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auto it = p->glyphs_.find(c);
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if (it == p->glyphs_.end())
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{
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BOOST_LOG_TRIVIAL(info)
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<< logPrefix_
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<< "Character not found: " << static_cast<uint32_t>(c);
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continue;
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}
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TextureGlyph& glyph = it->second;
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if (i > 0)
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{
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x += Kerning(text[i - 1], c) * scale;
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}
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x += glyph.advanceX_ * scale;
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}
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return x;
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}
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GLuint Font::GenerateTexture(gl::OpenGLFunctions& gl)
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{
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gl.glGenTextures(1, &p->atlas_->id);
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gl.glBindTexture(GL_TEXTURE_2D, p->atlas_->id);
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gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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gl.glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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gl.glTexImage2D(GL_TEXTURE_2D,
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0,
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GL_RED,
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static_cast<GLsizei>(p->atlas_->width),
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static_cast<GLsizei>(p->atlas_->height),
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0,
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GL_RED,
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GL_UNSIGNED_BYTE,
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p->atlas_->data);
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return p->atlas_->id;
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}
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std::shared_ptr<Font> Font::Create(const std::string& resource)
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{
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BOOST_LOG_TRIVIAL(debug) << logPrefix_ << "Loading font file: " << resource;
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std::shared_ptr<Font> font = nullptr;
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boost::timer::cpu_timer timer;
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auto it = fontMap_.find(resource);
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if (it != fontMap_.end())
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{
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BOOST_LOG_TRIVIAL(debug) << logPrefix_ << "Font already created";
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return it->second;
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}
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QFile fontFile(resource.c_str());
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fontFile.open(QIODevice::ReadOnly);
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if (!fontFile.isOpen())
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{
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BOOST_LOG_TRIVIAL(error) << logPrefix_ << "Could not read font file";
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return font;
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}
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font = std::make_shared<Font>(resource);
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QByteArray fontData = fontFile.readAll();
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font->p->atlas_ = ftgl::texture_atlas_new(512, 512, 1);
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ftgl::texture_font_t* textureFont = ftgl::texture_font_new_from_memory(
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font->p->atlas_, BASE_POINT_SIZE, fontData.constData(), fontData.size());
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font->p->ParseNames(textureFont->face);
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textureFont->rendermode = ftgl::RENDER_SIGNED_DISTANCE_FIELD;
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timer.start();
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texture_font_load_glyphs(textureFont, CODEPOINTS.c_str());
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timer.stop();
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// Single-byte UTF-8 characters
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for (const char& c : CODEPOINTS)
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{
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const ftgl::texture_glyph_t* glyph =
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ftgl::texture_font_get_glyph(textureFont, &c);
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if (glyph != nullptr)
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{
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font->p->glyphs_.emplace(c,
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TextureGlyph(glyph->offset_x,
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glyph->offset_y,
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static_cast<int>(glyph->width),
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static_cast<int>(glyph->height),
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glyph->s0,
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glyph->t0,
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glyph->s1,
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glyph->t1,
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glyph->advance_x));
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}
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}
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BOOST_LOG_TRIVIAL(debug)
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<< logPrefix_ << "Font loaded in " << timer.format(6, "%ws");
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texture_font_delete(textureFont);
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if (font != nullptr)
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{
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fontMap_.insert({resource, font});
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}
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return font;
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}
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void FontImpl::ParseNames(FT_Face face)
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{
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FT_SfntName sfntName;
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FT_Error error;
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FT_UInt nameCount = FT_Get_Sfnt_Name_Count(face);
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for (FT_UInt i = 0; i < nameCount; i++)
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{
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error = FT_Get_Sfnt_Name(face, i, &sfntName);
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if (error == 0)
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{
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switch (sfntName.name_id)
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{
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case TT_NAME_ID_FONT_FAMILY:
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ParseSfntName(sfntName, fontData_.fontFamily_);
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break;
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case TT_NAME_ID_FONT_SUBFAMILY:
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ParseSfntName(sfntName, fontData_.fontSubfamily_);
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break;
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}
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}
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}
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BOOST_LOG_TRIVIAL(debug)
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<< logPrefix_ << "Font family: " << fontData_.fontFamily_ << " ("
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<< fontData_.fontSubfamily_ << ")";
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}
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static void ParseSfntName(const FT_SfntName& sfntName, std::string& str)
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{
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if (str.empty())
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{
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if (sfntName.platform_id == TT_PLATFORM_MICROSOFT &&
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sfntName.encoding_id == TT_MS_ID_UNICODE_CS)
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{
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char16_t* tempString = new char16_t[sfntName.string_len / 2];
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memcpy(tempString, sfntName.string, sfntName.string_len);
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for (size_t j = 0; j < sfntName.string_len / 2; j++)
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{
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tempString[j] = ntohs(tempString[j]);
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}
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str =
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std::wstring_convert<std::codecvt_utf8_utf16<char16_t>, char16_t> {}
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.to_bytes(tempString, tempString + sfntName.string_len / 2);
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delete[] tempString;
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}
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else if (sfntName.platform_id == TT_PLATFORM_MACINTOSH &&
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sfntName.encoding_id == TT_MAC_ID_ROMAN)
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{
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str = std::string(reinterpret_cast<char*>(sfntName.string),
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sfntName.string_len);
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}
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}
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}
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} // namespace util
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} // namespace qt
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} // namespace scwx
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