編集履歴

質問編集履歴

再度文章を修正

2021/05/10 10:18

投稿

退会済みユーザー

スコア0

test CHANGED Viewed

File without changes

test CHANGED Viewed

@@ -1,12 +1,14 @@
-Openglでfreetypeを使って日本語の文字を描画したいです。　提示サイトでは英語の文字表示をやり方が乗っているのでその通り描画したのですが英語しか描画されません、日本語を描画させるにはどういった行為を行うのでしょうか？　色々調べましたがわかりません。
+Openglでfreetypeを使って日本語の文字を描画したいです。　提示サイトでは英語の文字表示をやり方が乗っているやり方では事前に用意したアルファベットの文字を描画していますが。日本語はまた違うはずです。提示コードの//////コメント内部のfor文ですが参考サイトを参考に
+const char16_t型にキャストして日本語文字の描画を試みましたが字の枠しか描画されませんこれはどうしたらいいのでしょうか？
+![イメージ説明](3a3c2811ee4c418acc232cc701b82478.png)
 参考サイト: http://blendgimper.hatenablog.jp/entry/2016/01/01/074615
@@ -130,31 +132,89 @@
+    //アルファブレンドを有効
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+}
+void FrameWork::Text::Draw(glm::vec2 pos,const char16_t* text,float scale, glm::vec3 color)
+{
+    setEnable();    //シェーダーを有効にする
+    pos.y = windowContext->getSize().y - pos.y - charSize;
+    //テクスチャをアクティブ
+    glActiveTexture(GL_TEXTURE0);
+    glBindVertexArray(vao);
-    /*
+    //Unform
+    setUniform3f("textColor",color);
+    setUniformMatrix4fv("uViewProjection", glm::ortho(0.0f, windowContext->getSize().x, 0.0f, windowContext->getSize().y));
+ ///////////////////////////////////////////////////////////////////////////////////////////////////////////////
-    for (unsigned char c = 0; c < 128; c++)
+    for (int i = 0; text[i] != '\0'; i++)
     {
+        unsigned int texture = 0;
         // load character glyph
-        if (FT_Load_Char(face, c, FT_LOAD_RENDER))
+        FT_Load_Glyph(face, FT_Get_Char_Index(face, (char16_t)text[i]), FT_LOAD_RENDER);
-        {
-            std::cout << "ERROR::FREETYTPE: Failed to load Glyph" << std::endl;
+        // now store character for later use
+        Character ch = {
-            continue;
+            texture,
+            glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
+            glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
+            (unsigned int)face->glyph->advance.x
-        }
+        };
         // generate texture
-        unsigned int texture;
-        glGenTextures(1, &texture);
+        glGenTextures(1, &ch.textureID);
-        glBindTexture(GL_TEXTURE_2D, texture);
+        glBindTexture(GL_TEXTURE_2D, ch.textureID);
         glTexImage2D(
@@ -190,338 +250,100 @@
         // now store character for later use
+        float xpos = pos.x + ch.Bearing.x * scale;
+        float ypos = pos.y - (ch.Size.y - ch.Bearing.y) * scale;
+        float w = ch.Size.x * scale;
+        float h = ch.Size.y * scale;
+        // update VBO for each character
-        Character character = {
+        float vertices[6][4] = {
-            texture,
-            glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
-            glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
-            (unsigned int)face->glyph->advance.x
+            { xpos,     ypos + h,   0.0f, 0.0f },
+            { xpos,     ypos,       0.0f, 1.0f },
+            { xpos + w, ypos,       1.0f, 1.0f },
+            { xpos,     ypos + h,   0.0f, 0.0f },
+            { xpos + w, ypos,       1.0f, 1.0f },
+            { xpos + w, ypos + h,   1.0f, 0.0f }
         };
+        // render glyph texture over quad
+        // update content of VBO memory
+        glBindBuffer(GL_ARRAY_BUFFER, vbo);
-        Characters.insert(std::pair<char, Character>(c, character));
+        glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+        // render quad
+        glDrawArrays(GL_TRIANGLES, 0, 6);
+        // now advance cursors for next glyph (note that advance is number of 1/64 pixels)
+        pos.x += ((ch.Advance >> 6) * scale); // bitshift by 6 to get value in pixels (2^6 = 64)
-    }
+    }
-    */
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
-    //アルファブレンドを有効
+    glBindVertexArray(0);
-    glEnable(GL_BLEND);
+    glBindTexture(GL_TEXTURE_2D, 0);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    setDisable();   //シェーダーを無効にする
 }
-void FrameWork::Text::Draw(glm::vec2 pos,std::string text,float scale, glm::vec3 color)
+FrameWork::Text::~Text()
 {
-    setEnable();    //シェーダーを有効にする
-    pos.y = windowContext->getSize().y - pos.y - charSize;
-    //テクスチャをアクティブ
-    glActiveTexture(GL_TEXTURE0);
-    glBindVertexArray(vao);
-    //Unform
+    //グリフ解放
-    setUniform3f("textColor",color);
-    setUniformMatrix4fv("uViewProjection", glm::ortho(0.0f, windowContext->getSize().x, 0.0f, windowContext->getSize().y));
-    std::string::const_iterator c;
-    for (c = text.begin(); c != text.end(); c++)
-    {
-        unsigned int texture = 0;
+    FT_Done_Face(face);
-        // load character glyph
-        FT_Load_Glyph(face, FT_Get_Char_Index(face, *c), FT_LOAD_RENDER);
-        // now store character for later use
-        Character ch = {
-            texture,
-            glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
-            glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
-            (unsigned int)face->glyph->advance.x
-        };
-        // generate texture
-        glGenTextures(1, &texture);
-        glBindTexture(GL_TEXTURE_2D, texture);
-        glTexImage2D(
-            GL_TEXTURE_2D,
-            0,
-            GL_RED,
-            face->glyph->bitmap.width,
-            face->glyph->bitmap.rows,
-            0,
-            GL_RED,
-            GL_UNSIGNED_BYTE,
-            face->glyph->bitmap.buffer
-        );
-        // set texture options
-        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-        // now store character for later use
-        float xpos = pos.x + ch.Bearing.x * scale;
-        float ypos = pos.y - (ch.Size.y - ch.Bearing.y) * scale;
-        float w = ch.Size.x * scale;
-        float h = ch.Size.y * scale;
-        // update VBO for each character
-        float vertices[6][4] = {
-            { xpos,     ypos + h,   0.0f, 0.0f },
-            { xpos,     ypos,       0.0f, 1.0f },
-            { xpos + w, ypos,       1.0f, 1.0f },
-            { xpos,     ypos + h,   0.0f, 0.0f },
-            { xpos + w, ypos,       1.0f, 1.0f },
-            { xpos + w, ypos + h,   1.0f, 0.0f }
-        };
-        // render glyph texture over quad
-        glBindTexture(GL_TEXTURE_2D, ch.textureID);
-        // update content of VBO memory
-        glBindBuffer(GL_ARRAY_BUFFER, vbo);
-        glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
-        glBindBuffer(GL_ARRAY_BUFFER, 0);
-        // render quad
-        glDrawArrays(GL_TRIANGLES, 0, 6);
-        // now advance cursors for next glyph (note that advance is number of 1/64 pixels)
-        pos.x += ((ch.Advance >> 6) * scale); // bitshift by 6 to get value in pixels (2^6 = 64)
-    }
-    /*
-    // iterate through all characters
-    std::string::const_iterator c;
-    for (c = text.begin(); c != text.end(); c++)
-    {
-        Character ch = Characters[*c];
-        float xpos = pos.x + ch.Bearing.x * scale;
-        float ypos = pos.y - (ch.Size.y - ch.Bearing.y) * scale;
-        float w = ch.Size.x * scale;
-        float h = ch.Size.y * scale;
-        // update VBO for each character
-        float vertices[6][4] = {
-            { xpos,     ypos + h,   0.0f, 0.0f },
-            { xpos,     ypos,       0.0f, 1.0f },
-            { xpos + w, ypos,       1.0f, 1.0f },
-            { xpos,     ypos + h,   0.0f, 0.0f },
-            { xpos + w, ypos,       1.0f, 1.0f },
-            { xpos + w, ypos + h,   1.0f, 0.0f }
-        };
-        // render glyph texture over quad
-        glBindTexture(GL_TEXTURE_2D, ch.textureID);
-        // update content of VBO memory
-        glBindBuffer(GL_ARRAY_BUFFER, vbo);
-        glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
-        glBindBuffer(GL_ARRAY_BUFFER, 0);
-        // render quad
-        glDrawArrays(GL_TRIANGLES, 0, 6);
-        // now advance cursors for next glyph (note that advance is number of 1/64 pixels)
-        pos.x += ((ch.Advance >> 6) * scale); // bitshift by 6 to get value in pixels (2^6 = 64)
-    }
-    */
-    glBindVertexArray(0);
+    FT_Done_FreeType(ft);
-    glBindTexture(GL_TEXTURE_2D, 0);
-    setDisable();   //シェーダーを無効にする
 }
-FrameWork::Text::~Text()
-{
-    //グリフ解放
-    FT_Done_Face(face);
-    FT_Done_FreeType(ft);
-}
 ```

提示コードを修正

2021/05/10 10:18

投稿

退会済みユーザー

スコア0

test CHANGED Viewed

File without changes

test CHANGED Viewed

@@ -88,7 +88,7 @@
     //初期化
-    FT_Library ft;
     if (FT_Init_FreeType(&ft) != 0)
@@ -104,11 +104,9 @@
     //フェイス作成
-    FT_Face face;
-    if (FT_New_Face(ft, "Font/ariali.ttf", 0, &face) != 0)
+    if (FT_New_Face(ft, "C:\Windows\Fonts\meiryo.ttc", 0, &face) != 0)
     {
@@ -132,6 +130,8 @@
+    /*
     for (unsigned char c = 0; c < 128; c++)
     {
@@ -204,17 +204,313 @@
         };
         Characters.insert(std::pair<char, Character>(c, character));
-    }
+    }
+    */
+    //アルファブレンドを有効
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+}
+void FrameWork::Text::Draw(glm::vec2 pos,std::string text,float scale, glm::vec3 color)
+{
+    setEnable();    //シェーダーを有効にする
+    pos.y = windowContext->getSize().y - pos.y - charSize;
+    //テクスチャをアクティブ
+    glActiveTexture(GL_TEXTURE0);
+    glBindVertexArray(vao);
+    //Unform
+    setUniform3f("textColor",color);
+    setUniformMatrix4fv("uViewProjection", glm::ortho(0.0f, windowContext->getSize().x, 0.0f, windowContext->getSize().y));
+    std::string::const_iterator c;
+    for (c = text.begin(); c != text.end(); c++)
+    {
+        unsigned int texture = 0;
+        // load character glyph
+        FT_Load_Glyph(face, FT_Get_Char_Index(face, *c), FT_LOAD_RENDER);
+        // now store character for later use
+        Character ch = {
+            texture,
+            glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
+            glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
+            (unsigned int)face->glyph->advance.x
+        };
+        // generate texture
+        glGenTextures(1, &texture);
+        glBindTexture(GL_TEXTURE_2D, texture);
+        glTexImage2D(
+            GL_TEXTURE_2D,
+            0,
+            GL_RED,
+            face->glyph->bitmap.width,
+            face->glyph->bitmap.rows,
+            0,
+            GL_RED,
+            GL_UNSIGNED_BYTE,
+            face->glyph->bitmap.buffer
+        );
+        // set texture options
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        // now store character for later use
+        float xpos = pos.x + ch.Bearing.x * scale;
+        float ypos = pos.y - (ch.Size.y - ch.Bearing.y) * scale;
+        float w = ch.Size.x * scale;
+        float h = ch.Size.y * scale;
+        // update VBO for each character
+        float vertices[6][4] = {
+            { xpos,     ypos + h,   0.0f, 0.0f },
+            { xpos,     ypos,       0.0f, 1.0f },
+            { xpos + w, ypos,       1.0f, 1.0f },
+            { xpos,     ypos + h,   0.0f, 0.0f },
+            { xpos + w, ypos,       1.0f, 1.0f },
+            { xpos + w, ypos + h,   1.0f, 0.0f }
+        };
+        // render glyph texture over quad
+        glBindTexture(GL_TEXTURE_2D, ch.textureID);
+        // update content of VBO memory
+        glBindBuffer(GL_ARRAY_BUFFER, vbo);
+        glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+        // render quad
+        glDrawArrays(GL_TRIANGLES, 0, 6);
+        // now advance cursors for next glyph (note that advance is number of 1/64 pixels)
+        pos.x += ((ch.Advance >> 6) * scale); // bitshift by 6 to get value in pixels (2^6 = 64)
+    }
+    /*
+    // iterate through all characters
+    std::string::const_iterator c;
+    for (c = text.begin(); c != text.end(); c++)
+    {
+        Character ch = Characters[*c];
+        float xpos = pos.x + ch.Bearing.x * scale;
+        float ypos = pos.y - (ch.Size.y - ch.Bearing.y) * scale;
+        float w = ch.Size.x * scale;
+        float h = ch.Size.y * scale;
+        // update VBO for each character
+        float vertices[6][4] = {
+            { xpos,     ypos + h,   0.0f, 0.0f },
+            { xpos,     ypos,       0.0f, 1.0f },
+            { xpos + w, ypos,       1.0f, 1.0f },
+            { xpos,     ypos + h,   0.0f, 0.0f },
+            { xpos + w, ypos,       1.0f, 1.0f },
+            { xpos + w, ypos + h,   1.0f, 0.0f }
+        };
+        // render glyph texture over quad
+        glBindTexture(GL_TEXTURE_2D, ch.textureID);
+        // update content of VBO memory
+        glBindBuffer(GL_ARRAY_BUFFER, vbo);
+        glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+        // render quad
+        glDrawArrays(GL_TRIANGLES, 0, 6);
+        // now advance cursors for next glyph (note that advance is number of 1/64 pixels)
+        pos.x += ((ch.Advance >> 6) * scale); // bitshift by 6 to get value in pixels (2^6 = 64)
+    }
+    */
+    glBindVertexArray(0);
+    glBindTexture(GL_TEXTURE_2D, 0);
+    setDisable();   //シェーダーを無効にする
+}
+FrameWork::Text::~Text()
+{
     //グリフ解放
@@ -222,146 +518,10 @@
     FT_Done_FreeType(ft);
-    //アルファブレンドを有効
-    glEnable(GL_BLEND);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 }
-void FrameWork::Text::Draw(glm::vec2 pos,std::string text,float scale, glm::vec3 color)
-{
-    setEnable();    //シェーダーを有効にする
-    pos.y = windowContext->getSize().y - pos.y - charSize;
-    //テクスチャをアクティブ
-    glActiveTexture(GL_TEXTURE0);
-    glBindVertexArray(vao);
-    //Unform
-    setUniform3f("textColor",color);
-//    glm::ortho(0.0f, 800.0f, 0.0f, 600.0f);
-    setUniformMatrix4fv("uViewProjection", glm::ortho(0.0f, windowContext->getSize().x, 0.0f, windowContext->getSize().y));
-    // iterate through all characters
-    std::string::const_iterator c;
-    for (c = text.begin(); c != text.end(); c++)
-    {
-        Character ch = Characters[*c];
-        float xpos = pos.x + ch.Bearing.x * scale;
-        float ypos = pos.y - (ch.Size.y - ch.Bearing.y) * scale;
-        float w = ch.Size.x * scale;
-        float h = ch.Size.y * scale;
-        // update VBO for each character
-        float vertices[6][4] = {
-            { xpos,     ypos + h,   0.0f, 0.0f },
-            { xpos,     ypos,       0.0f, 1.0f },
-            { xpos + w, ypos,       1.0f, 1.0f },
-            { xpos,     ypos + h,   0.0f, 0.0f },
-            { xpos + w, ypos,       1.0f, 1.0f },
-            { xpos + w, ypos + h,   1.0f, 0.0f }
-        };
-        // render glyph texture over quad
-        glBindTexture(GL_TEXTURE_2D, ch.textureID);
-        // update content of VBO memory
-        glBindBuffer(GL_ARRAY_BUFFER, vbo);
-        glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
-        glBindBuffer(GL_ARRAY_BUFFER, 0);
-        // render quad
-        glDrawArrays(GL_TRIANGLES, 0, 6);
-        // now advance cursors for next glyph (note that advance is number of 1/64 pixels)
-        pos.x += ((ch.Advance >> 6) * scale); // bitshift by 6 to get value in pixels (2^6 = 64)
-    }
-    glBindVertexArray(0);
-    glBindTexture(GL_TEXTURE_2D, 0);
-    setDisable();   //シェーダーを無効にする
-}
-FrameWork::Text::~Text()
-{
-}
 ```