質問編集履歴
2
再度文章を修正
title
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@@ -1,8 +1,9 @@
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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
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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
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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？
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参考サイト: http://blendgimper.hatenablog.jp/entry/2016/01/01/074615
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参考サイト: https://learnopengl.com/In-Practice/Text-Rendering
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```cpp
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@@ -64,58 +65,12 @@
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // disable byte-alignment restriction
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/*
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for (unsigned char c = 0; c < 128; c++)
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{
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// load character glyph
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if (FT_Load_Char(face, c, FT_LOAD_RENDER))
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{
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std::cout << "ERROR::FREETYTPE: Failed to load Glyph" << std::endl;
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continue;
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}
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// generate texture
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unsigned int texture;
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glGenTextures(1, &texture);
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glBindTexture(GL_TEXTURE_2D, texture);
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glTexImage2D(
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GL_TEXTURE_2D,
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0,
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GL_RED,
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face->glyph->bitmap.width,
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face->glyph->bitmap.rows,
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0,
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GL_RED,
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GL_UNSIGNED_BYTE,
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face->glyph->bitmap.buffer
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);
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// set texture options
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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// now store character for later use
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Character character = {
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texture,
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glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
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glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
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(unsigned int)face->glyph->advance.x
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};
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-
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Characters.insert(std::pair<char, Character>(c, character));
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-
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}
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*/
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-
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//アルファブレンドを有効
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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}
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void FrameWork::Text::Draw(glm::vec2 pos,
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void FrameWork::Text::Draw(glm::vec2 pos,const char16_t* text,float scale, glm::vec3 color)
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{
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setEnable(); //シェーダーを有効にする
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@@ -128,20 +83,14 @@
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//Unform
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setUniform3f("textColor",color);
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setUniformMatrix4fv("uViewProjection", glm::ortho(0.0f, windowContext->getSize().x, 0.0f, windowContext->getSize().y));
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////
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for (
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for (int i = 0; text[i] != '\0'; i++)
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{
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unsigned int texture = 0;
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// load character glyph
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FT_Load_Glyph(face, FT_Get_Char_Index(face,
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FT_Load_Glyph(face, FT_Get_Char_Index(face, (char16_t)text[i]), FT_LOAD_RENDER);
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// now store character for later use
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@@ -155,8 +104,9 @@
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// generate texture
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glGenTextures(1, &
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glGenTextures(1, &ch.textureID);
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glBindTexture(GL_TEXTURE_2D,
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glBindTexture(GL_TEXTURE_2D, ch.textureID);
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glTexImage2D(
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GL_TEXTURE_2D,
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0,
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{ xpos + w, ypos + h, 1.0f, 0.0f }
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};
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// render glyph texture over quad
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glBindTexture(GL_TEXTURE_2D, ch.textureID);
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// update content of VBO memory
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glBindBuffer(GL_ARRAY_BUFFER, vbo);
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glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
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@@ -207,45 +156,7 @@
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// now advance cursors for next glyph (note that advance is number of 1/64 pixels)
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pos.x += ((ch.Advance >> 6) * scale); // bitshift by 6 to get value in pixels (2^6 = 64)
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}
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/*
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// iterate through all characters
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std::string::const_iterator c;
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for (c = text.begin(); c != text.end(); c++)
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{
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Character ch = Characters[*c];
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float xpos = pos.x + ch.Bearing.x * scale;
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float ypos = pos.y - (ch.Size.y - ch.Bearing.y) * scale;
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float w = ch.Size.x * scale;
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float h = ch.Size.y * scale;
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// update VBO for each character
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float vertices[6][4] = {
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{ xpos, ypos + h, 0.0f, 0.0f },
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{ xpos, ypos, 0.0f, 1.0f },
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{ xpos + w, ypos, 1.0f, 1.0f },
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{ xpos, ypos + h, 0.0f, 0.0f },
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{ xpos + w, ypos, 1.0f, 1.0f },
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{ xpos + w, ypos + h, 1.0f, 0.0f }
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};
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// render glyph texture over quad
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glBindTexture(GL_TEXTURE_2D, ch.textureID);
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// update content of VBO memory
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glBindBuffer(GL_ARRAY_BUFFER, vbo);
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glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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// render quad
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glDrawArrays(GL_TRIANGLES, 0, 6);
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// now advance cursors for next glyph (note that advance is number of 1/64 pixels)
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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}
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*/
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glBindVertexArray(0);
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glBindTexture(GL_TEXTURE_2D, 0);
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setDisable(); //シェーダーを無効にする
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1
提示コードを修正
title
CHANGED
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File without changes
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body
CHANGED
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@@ -43,7 +43,7 @@
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43
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//FreeTypeを初期化
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//
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//初期化
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if (FT_Init_FreeType(&ft) != 0)
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{
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std::cout << "ERROR::FREETYPE: Could not init FreeType Library"<<std::endl;
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@@ -51,9 +51,8 @@
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}
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//フェイス作成
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FT_Face face;
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56
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if (FT_New_Face(ft, "
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if (FT_New_Face(ft, "C:\Windows\Fonts\meiryo.ttc", 0, &face) != 0)
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{
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std::cout<<"ERROR::FREETYPE: Failed to load font" << std::endl;
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assert(0);
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@@ -65,6 +64,7 @@
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1); // disable byte-alignment restriction
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66
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/*
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for (unsigned char c = 0; c < 128; c++)
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69
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{
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70
70
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// load character glyph
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@@ -101,16 +101,15 @@
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101
101
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(unsigned int)face->glyph->advance.x
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102
102
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103
103
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};
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104
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+
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104
105
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Characters.insert(std::pair<char, Character>(c, character));
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106
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+
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105
107
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}
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108
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+
*/
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108
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112
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110
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//グリフ解放
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111
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-
FT_Done_Face(face);
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112
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FT_Done_FreeType(ft);
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113
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-
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//アルファブレンドを有効
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114
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glEnable(GL_BLEND);
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116
115
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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@@ -128,10 +127,88 @@
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128
127
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129
128
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//Unform
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130
129
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setUniform3f("textColor",color);
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130
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+
setUniformMatrix4fv("uViewProjection", glm::ortho(0.0f, windowContext->getSize().x, 0.0f, windowContext->getSize().y));
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131
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+
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134
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135
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137
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std::string::const_iterator c;
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138
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for (c = text.begin(); c != text.end(); c++)
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139
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{
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140
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+
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141
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unsigned int texture = 0;
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142
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+
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143
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// load character glyph
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144
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FT_Load_Glyph(face, FT_Get_Char_Index(face, *c), FT_LOAD_RENDER);
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145
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+
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146
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+
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147
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+
// now store character for later use
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148
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+
Character ch = {
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149
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+
texture,
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150
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+
glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
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151
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+
glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
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152
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+
(unsigned int)face->glyph->advance.x
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153
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+
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154
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};
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155
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+
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156
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+
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157
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// generate texture
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158
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glGenTextures(1, &texture);
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159
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glBindTexture(GL_TEXTURE_2D, texture);
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160
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glTexImage2D(
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161
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GL_TEXTURE_2D,
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162
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0,
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163
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GL_RED,
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164
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face->glyph->bitmap.width,
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165
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face->glyph->bitmap.rows,
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166
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0,
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167
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GL_RED,
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168
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GL_UNSIGNED_BYTE,
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face->glyph->bitmap.buffer
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);
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// set texture options
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172
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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173
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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174
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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175
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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// now store character for later use
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+
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+
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+
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180
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float xpos = pos.x + ch.Bearing.x * scale;
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181
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float ypos = pos.y - (ch.Size.y - ch.Bearing.y) * scale;
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182
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+
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183
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+
float w = ch.Size.x * scale;
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184
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+
float h = ch.Size.y * scale;
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185
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+
// update VBO for each character
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186
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+
float vertices[6][4] = {
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187
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+
{ xpos, ypos + h, 0.0f, 0.0f },
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188
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+
{ xpos, ypos, 0.0f, 1.0f },
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189
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+
{ xpos + w, ypos, 1.0f, 1.0f },
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190
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+
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191
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+
{ xpos, ypos + h, 0.0f, 0.0f },
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192
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+
{ xpos + w, ypos, 1.0f, 1.0f },
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193
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+
{ xpos + w, ypos + h, 1.0f, 0.0f }
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194
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+
};
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195
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// render glyph texture over quad
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196
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glBindTexture(GL_TEXTURE_2D, ch.textureID);
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132
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-
//
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197
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+
// update content of VBO memory
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198
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+
glBindBuffer(GL_ARRAY_BUFFER, vbo);
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199
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+
glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
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200
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+
glBindBuffer(GL_ARRAY_BUFFER, 0);
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201
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+
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202
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+
// render quad
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203
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+
glDrawArrays(GL_TRIANGLES, 0, 6);
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204
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+
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205
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+
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206
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+
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133
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-
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207
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+
// now advance cursors for next glyph (note that advance is number of 1/64 pixels)
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134
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-
|
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208
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+
pos.x += ((ch.Advance >> 6) * scale); // bitshift by 6 to get value in pixels (2^6 = 64)
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209
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+
}
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210
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+
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211
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+
/*
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135
212
|
// iterate through all characters
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|
136
213
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std::string::const_iterator c;
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137
214
|
for (c = text.begin(); c != text.end(); c++)
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|
@@ -167,8 +244,8 @@
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167
244
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pos.x += ((ch.Advance >> 6) * scale); // bitshift by 6 to get value in pixels (2^6 = 64)
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168
245
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|
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169
246
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}
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247
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+
*/
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170
248
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171
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-
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172
249
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glBindVertexArray(0);
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173
250
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glBindTexture(GL_TEXTURE_2D, 0);
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174
251
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setDisable(); //シェーダーを無効にする
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|
@@ -178,6 +255,9 @@
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178
255
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179
256
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FrameWork::Text::~Text()
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|
180
257
|
{
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258
|
+
//グリフ解放
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259
|
+
FT_Done_Face(face);
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260
|
+
FT_Done_FreeType(ft);
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181
261
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182
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}
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