105 lines
2.2 KiB
C++
105 lines
2.2 KiB
C++
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#include "TextRenderer.hpp"
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#include <cassert>
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#include <cstdlib>
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#include <mutex>
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#include <optional>
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#include <string>
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#include <string_view>
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#include <unordered_map>
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#include <fontconfig/fontconfig.h>
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#include <raylib.h>
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TextRenderer::TextRenderer()
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{
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static char const msdf_fs_data[] {
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#embed "msdf.fs"
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, 0
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};
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m_msdf_shader = LoadShaderFromMemory(nullptr, msdf_fs_data);
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assert(IsShaderValid(m_msdf_shader));
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}
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TextRenderer::~TextRenderer() { UnloadShader(m_msdf_shader); }
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auto TextRenderer::measure_text(FontHandle const font,
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std::string_view const text, int const size) -> Vector2
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{
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// FIXME: Implement.
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return {};
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}
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auto TextRenderer::draw_text(FontHandle const font, std::string_view const text,
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Vector2 const pos, int const size, Color const color) -> void
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{
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int const pos_x = pos.x;
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int const pos_y = pos.y;
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// Don't use pos from here on out!
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// FIXME: Implement.
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(void)pos_x, (void)pos_y;
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}
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auto TextRenderer::load_font(std::filesystem::path const &path)
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-> std::optional<FontHandle>
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{
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// FIXME: Implement.
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return std::nullopt;
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}
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auto TextRenderer::unload_font(FontHandle const font)
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{
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// FIXME: Implement.
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}
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auto find_font_path(std::string_view path)
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-> std::optional<std::filesystem::path>
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{
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static std::once_flag fc_once;
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std::call_once(fc_once, []() {
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if (FcInit())
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std::atexit([] { FcFini(); });
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});
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static std::mutex m;
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static std::unordered_map<std::string, std::optional<std::string>> cache;
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std::string const key(path);
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{
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std::scoped_lock lock(m);
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if (auto it = cache.find(key); it != cache.end())
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return it->second;
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}
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FcPattern *pattern
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= FcNameParse(reinterpret_cast<FcChar8 const *>(key.c_str()));
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if (!pattern) {
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std::scoped_lock lock(m);
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return cache[key] = std::nullopt;
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}
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FcConfigSubstitute(nullptr, pattern, FcMatchPattern);
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FcDefaultSubstitute(pattern);
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FcResult result;
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FcPattern *font = FcFontMatch(nullptr, pattern, &result);
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std::optional<std::string> final_path;
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if (font) {
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FcChar8 *file;
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if (FcPatternGetString(font, FC_FILE, 0, &file) == FcResultMatch)
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final_path = reinterpret_cast<char *>(file);
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FcPatternDestroy(font);
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}
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FcPatternDestroy(pattern);
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{
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std::scoped_lock lock(m);
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cache[key] = final_path;
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}
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return final_path;
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}
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