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#include "text.h"
#include "font.h"
#include "gfx/gl/uiShader.h"
#include "uiComponent.h"
#include <array>
#include <glArrays.h>
#include <glm/gtc/type_ptr.hpp>
#include <utility>
Text::Text(std::string_view s, const Font & font, Position pos, glm::vec3 c) : UIComponent {pos}, colour {c}
{
for (const auto & textureQuads : font.render(s)) {
auto & rendering
= models.emplace_back(textureQuads.first, static_cast<GLsizei>(6 * textureQuads.second.size()));
glBindVertexArray(rendering.vao);
glBindBuffer(GL_ARRAY_BUFFER, rendering.vbo);
std::vector<glm::vec4> vertices;
vertices.reserve(6 * textureQuads.second.size());
for (const auto & quad : textureQuads.second) {
for (auto offset = 0U; offset < 3; offset += 2) {
for (auto vertex = 0U; vertex < 3; vertex += 1) {
vertices.emplace_back(quad[(vertex + offset) % 4] + glm::vec4 {position.origin, 0, 0});
}
}
};
glBufferData(GL_ARRAY_BUFFER, static_cast<GLsizeiptr>(sizeof(glm::vec4)) * rendering.count,
glm::value_ptr(vertices.front()), GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, sizeof(glm::vec4), nullptr);
glBindVertexArray(0);
}
}
void
Text::render(const UIShader & shader, const Position &) const
{
shader.text.use(colour);
glActiveTexture(GL_TEXTURE0);
for (const auto & m : models) {
glBindTexture(GL_TEXTURE_2D, m.texture);
glBindVertexArray(m.vao);
glDrawArrays(GL_TRIANGLES, 0, m.count);
}
glBindVertexArray(0);
glBindTexture(GL_TEXTURE_2D, 0);
}
bool
Text::handleInput(const SDL_Event &, const Position &)
{
return false;
}
Text::Model::Model(GLuint t, GLsizei c) : texture {t}, count {c} { }
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