From c1e16b213ea93bf05cc3d1de23fcda3e9a66f14f Mon Sep 17 00:00:00 2001
From: Nanako <469449812@qq.com>
Date: Tue, 24 Dec 2024 09:32:17 +0800
Subject: [PATCH] =?UTF-8?q?TODO:=20=E5=A4=9A=E5=AD=97=E4=BD=93=E5=92=8C?=
 =?UTF-8?q?=E5=AD=97=E4=BD=93=E7=BC=BA=E5=A4=B1=E5=A4=84=E7=90=86?=
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---
 src/renderer/backend/dx/dx_window.cpp         |  2 +-
 .../core/renderer/renderer_context.cpp        | 24 ++---
 src/renderer/core/renderer/renderer_text.cpp  | 89 ++++++++++---------
 src/renderer/core/renderer/renderer_text.h    |  6 +-
 4 files changed, 63 insertions(+), 58 deletions(-)

diff --git a/src/renderer/backend/dx/dx_window.cpp b/src/renderer/backend/dx/dx_window.cpp
index ed691df..443441f 100644
--- a/src/renderer/backend/dx/dx_window.cpp
+++ b/src/renderer/backend/dx/dx_window.cpp
@@ -112,7 +112,7 @@ void dx_window::begin_frame() {
     // context.draw_line( { 600, 600 }, { mouse_x, mouse_y }, { 1, 0, 1, 1 }, thickness);
 
     // if (test_texture) context.draw_texture({ 0.f, 0.f }, test_texture->size().cast<float>(), test_texture);
-    context.draw_string({0, 0}, L"你好，世界！全是水群大师\n测试换行", 32);
+    context.draw_string({0, 0}, L"你好，世界！全是水群大师\n测试换行\n测试日语: かわいい\n测试俄语: милый", 32);
 
     context.flush();
 
diff --git a/src/renderer/core/renderer/renderer_context.cpp b/src/renderer/core/renderer/renderer_context.cpp
index d521aa3..9ff51c8 100644
--- a/src/renderer/core/renderer/renderer_context.cpp
+++ b/src/renderer/core/renderer/renderer_context.cpp
@@ -54,21 +54,23 @@ void renderer_context::draw_string(const Eigen::Vector2f& in_pos, const std::wst
         }
         cursor_x += last_char ? text->get_kerning(last_char, c) : 0;
 
-        character_info info{};
-        text->get_or_create_character(c, info);
+        const character_info* info = text->get_or_create_character(c);
+        if (!info) {
+            continue;
+        }
 
         // 根据in_height缩放字符大小
-        const float y_offset = (info.y_offset + text->get_ascent()) * scale;
-        const Eigen::Vector2f size { info.width * scale, info.height * scale };
-        const Eigen::Vector2f pos { cursor_x + info.x_offset * scale, cursor_y + y_offset };
-        cursor_x += info.advance * scale;
+        const float y_offset = (info->y_offset + text->get_ascent()) * scale;
+        const Eigen::Vector2f size { info->width * scale, info->height * scale };
+        const Eigen::Vector2f pos { cursor_x + info->x_offset * scale, cursor_y + y_offset };
+        cursor_x += info->advance * scale;
 
         aorii_vertex_param param{};
-        param.param_a1 = info.tex_u;
-        param.param_a2 = info.tex_v;
-        param.param_a3 = info.tex_z;
-        param.param_b1 = info.width / (float)text->get_texture_size();
-        param.param_b2 = info.height / (float)text->get_texture_size();
+        param.param_a1 = info->tex_u;
+        param.param_a2 = info->tex_v;
+        param.param_a3 = info->tex_z;
+        param.param_b1 = info->width / (float)text->get_texture_size();
+        param.param_b2 = info->height / (float)text->get_texture_size();
 
         make_rect(pos, size, in_color, 0, param);
         last_char = c;
diff --git a/src/renderer/core/renderer/renderer_text.cpp b/src/renderer/core/renderer/renderer_text.cpp
index 88f8c5e..878fa31 100644
--- a/src/renderer/core/renderer/renderer_text.cpp
+++ b/src/renderer/core/renderer/renderer_text.cpp
@@ -25,13 +25,13 @@ const std::wstring aorii_text::COMMON_PUNCTUATION =
 const std::wstring aorii_text::COMMON_NUMBERS =
     L"0123456789";
 
-aorii_text::aorii_text(const uint32_t in_texture_size) : font(nullptr), texture_array(nullptr),
+aorii_text::aorii_text(const uint32_t in_texture_size) : fonts(nullptr), texture_array(nullptr),
     texture_size(in_texture_size),
     current_x(0), current_y(0), current_texture_index(0), scale(0) {
 }
 
 aorii_text::~aorii_text() {
-    delete font;
+    delete fonts;
 }
 
 bool aorii_text::init_freetype() {
@@ -44,7 +44,7 @@ void aorii_text::destroy_freetype() {
 bool aorii_text::initialize(const wchar_t* in_font_path, const float in_font_pixel_size) {
     const std::string font_path_a(in_font_path, in_font_path + wcslen(in_font_path));
 
-    font = new stbtt_fontinfo();
+    auto font = new stbtt_fontinfo();
     font_pixel_size = in_font_pixel_size;
 
     // 加载字体文件
@@ -67,7 +67,6 @@ bool aorii_text::initialize(const wchar_t* in_font_path, const float in_font_pix
         spdlog::error("Failed to initialize font");
         free(font_buffer);
         delete font;
-        font = nullptr;
         return false;
     }
 
@@ -78,8 +77,9 @@ bool aorii_text::initialize(const wchar_t* in_font_path, const float in_font_pix
     ascent *= scale;
     descent *= scale;
     line_gap *= scale;
-    spdlog::info("Font vertical metrics:\n  上升距离: {}, 下降距离: {}, 行间距: {}", ascent, descent, line_gap);
+    spdlog::info("Font vertical metrics: 上升距离: {}, 下降距离: {}, 行间距: {}", ascent, descent, line_gap);
 
+    fonts.push_back(font);
     // Create initial texture atlas
     return create_new_texture_atlas();
 }
@@ -96,26 +96,16 @@ bool aorii_text::create_new_texture_atlas() {
     return texture_array != nullptr;
 }
 
-bool aorii_text::get_or_create_character(const wchar_t ch, character_info& out_info) {
+character_info* aorii_text::get_or_create_character(const wchar_t ch) {
     if (const auto it = character_map.find(ch); it != character_map.end()) {
-        out_info = it->second;
-        return true;
+        return &it->second;
     }
-
-    // 加载目标字符（以 'A' 为例）
-    int glyph_index = stbtt_FindGlyphIndex(font, ch);
-    if (glyph_index == 0) {
-        printf("Failed to find glyph for character\n");
-        return false;
-    }
-
     // Try to add to current atlas
-    out_info = add_character_to_atlas(glyph_index, ch);
-    return true;
+    return add_character_to_atlas(ch);
 }
 
 bool aorii_text::precache_characters(const std::wstring& characters) {
-    if (!font) {
+    if (!fonts.size()) {
         spdlog::error("Font not initialized");
         return false;
     }
@@ -138,14 +128,8 @@ bool aorii_text::precache_characters(const std::wstring& characters) {
             continue;
         }
 
-        // 加载目标字符（以 'A' 为例）
-        int glyph_index = stbtt_FindGlyphIndex(font, ch);
-        if (glyph_index == 0) {
-            continue;
-        }
-
         // 生成SDF数据
-        add_character_to_atlas(glyph_index, ch);
+        add_character_to_atlas(ch);
     }
 
     return success;
@@ -166,31 +150,49 @@ bool aorii_text::precache_common_characters() {
     return precache_characters(all_common_chars);
 }
 
-uint32_t aorii_text::get_font_char_count() const { return font->numGlyphs; }
+uint32_t aorii_text::get_font_char_count() const {
+    uint32_t char_count = 0;
+    for (auto& font : fonts) {
+        char_count += font->numGlyphs;
+    }
+    return char_count;
+}
 
-character_info& aorii_text::add_character_to_atlas(int32_t glyph_index, const wchar_t ch) {
+character_info* aorii_text::add_character_to_atlas(const wchar_t ch) {
     // 获取SDF尺寸和位图
     int32_t width, height, x_offset, y_offset;
     constexpr int padding = 8;
     constexpr uint8_t on_edge_value = 128;
     constexpr float pixel_dist_scale = 16.f;
 
-    auto* sdf_bitmap = stbtt_GetGlyphSDF(
-        font,
-        scale,
-        glyph_index,
-        padding,
-        on_edge_value,
-        pixel_dist_scale,
-        &width, &height,
-        &x_offset, &y_offset
-    );
+    uint8_t* sdf_bitmap = nullptr;
+    const stbtt_fontinfo* font_info = nullptr;
+    for (const auto f: fonts) {
+        const uint32_t glyph_index = stbtt_FindGlyphIndex(f, ch);
+        if (glyph_index == 0)
+            continue;
+        sdf_bitmap = stbtt_GetGlyphSDF(
+            f,
+            scale,
+            glyph_index,
+            padding,
+            on_edge_value,
+            pixel_dist_scale,
+            &width, &height,
+            &x_offset, &y_offset
+        );
+        if (sdf_bitmap) {
+            font_info = f;
+            break;
+        }
+    }
 
     if (!sdf_bitmap) {
-        throw std::runtime_error("Failed to generate SDF for glyph");
+        spdlog::error("Failed to generate SDF for glyph {}", ch);
+        return nullptr;
     }
     ON_SCOPE_EXIT {
-        stbtt_FreeSDF(sdf_bitmap, font->userdata);
+        stbtt_FreeSDF(sdf_bitmap, font_info->userdata);
     };
 
     // 检查当前行是否有足够空间
@@ -204,7 +206,8 @@ character_info& aorii_text::add_character_to_atlas(int32_t glyph_index, const wc
     if (current_y + height > texture_size) {
         current_texture_index++;
         if (current_texture_index >= texture_array->get_count()) {
-            throw std::runtime_error("Texture array capacity exceeded");
+            spdlog::error("Texture array capacity exceeded");
+            return nullptr;
         }
         current_x = 0;
         current_y = 0;
@@ -220,7 +223,7 @@ character_info& aorii_text::add_character_to_atlas(int32_t glyph_index, const wc
 
     // 获取字形度量信息
     int advance_width, left_side_bearing;
-    stbtt_GetGlyphHMetrics(font, glyph_index, &advance_width, &left_side_bearing);
+    stbtt_GetGlyphHMetrics(font_info, glyph_index, &advance_width, &left_side_bearing);
 
     // 创建并存储字符信息
     character_info info;
@@ -237,6 +240,6 @@ character_info& aorii_text::add_character_to_atlas(int32_t glyph_index, const wc
     current_x += width;
     next_row_y = std::max(next_row_y, current_y + height);
 
-    return character_map[ch] = info;
+    return &(character_map[ch] = info);
 }
 
diff --git a/src/renderer/core/renderer/renderer_text.h b/src/renderer/core/renderer/renderer_text.h
index 94510e6..f933b5c 100644
--- a/src/renderer/core/renderer/renderer_text.h
+++ b/src/renderer/core/renderer/renderer_text.h
@@ -28,7 +28,7 @@ public:
     static void destroy_freetype();
 
     bool initialize(const wchar_t* in_font_path, float in_font_pixel_size);
-    bool get_or_create_character(wchar_t ch, character_info& out_info);
+    character_info* get_or_create_character(wchar_t ch);
     // 上升距离
     [[nodiscard]] int32_t get_ascent() const { return ascent; }
     // 下降距离
@@ -57,8 +57,8 @@ public:
     float get_kerning(wchar_t ch1, wchar_t ch2) const;
 private:
     bool create_new_texture_atlas();
-    character_info& add_character_to_atlas(int32_t glyph_index, const wchar_t ch);
-    stbtt_fontinfo* font;
+    character_info* add_character_to_atlas(wchar_t ch);
+    std::vector<stbtt_fontinfo*> fonts;
 
     renderer_texture_array* texture_array;
     const uint32_t texture_size;