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feat: add text class

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zhenyan121
2026-04-16 10:44:05 +08:00
parent a8726b06c3
commit 311c675852
9 changed files with 252 additions and 40 deletions
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39
src/tools/font.cpp
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@@ -1,12 +1,10 @@
#include <Cubed/config.hpp>
#include <Cubed/shader.hpp>
#include <Cubed/tools/font.hpp>
#include <Cubed/tools/log.hpp>
#include <Cubed/tools/shader_tools.hpp>
Font::Font() {
if (FT_Init_FreeType(&m_ft)) {
@@ -24,9 +22,7 @@ Font::~Font() {
FT_Done_Face(m_face);
FT_Done_FreeType(m_ft);
for (const auto& [key, character] : m_characters) {
glDeleteTextures(1, &m_text_texture);
}
glDeleteTextures(1, &m_text_texture);
}
void Font::load_character(char8_t c) {
@@ -36,6 +32,7 @@ void Font::load_character(char8_t c) {
}
const auto& width = m_face->glyph->bitmap.width;
const auto& height = m_face->glyph->bitmap.rows;
glBindTexture(GL_TEXTURE_2D_ARRAY, m_text_texture);
glTexSubImage3D(
GL_TEXTURE_2D_ARRAY,
0,
@@ -90,13 +87,9 @@ void Font::setup_font_character() {
glBindTexture(GL_TEXTURE_2D_ARRAY, 0);
}
void Font::render_text(const Shader& shader, const std::string& text, float x, float y, float scale, const glm::vec3& color) {
std::vector<Vertex2D> Font::vertices(const std::string &text, float x, float y, float scale) {
static Font font;
glUniform3f(shader.loc("textColor"), color.x, color.y, color.z);
glActiveTexture(GL_TEXTURE0);
std::vector<Vertex2D> vertices;
for (char8_t c : text) {
@@ -122,22 +115,10 @@ void Font::render_text(const Shader& shader, const std::string& text, float x, f
x += (ch.advance >> 6) * scale;
}
GLuint vbo;
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(Vertex2D), vertices.data(), GL_STATIC_DRAW);
glBindTexture(GL_TEXTURE_2D_ARRAY, font.m_text_texture);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), (void*)0);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), (void*)offsetof(Vertex2D, s));
glVertexAttribPointer(2, 1, GL_FLOAT, GL_FALSE, sizeof(Vertex2D), (void*)offsetof(Vertex2D, layer));
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glEnableVertexAttribArray(2);
glDrawArrays(GL_TRIANGLES, 0, vertices.size());
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindTexture(GL_TEXTURE_2D_ARRAY, 0);
glDeleteBuffers(1, &vbo);
return vertices;
}
GLuint Font::text_texture() {
return m_text_texture;
}