142 lines
3.0 KiB
C++
142 lines
3.0 KiB
C++
/*
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* =====================================================================================
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*
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* Filename: Text.cpp
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*
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* Description:
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*
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* Created: 24/06/2018 01:50:39
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*
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* Author: Quentin Bazin, <quent42340@gmail.com>
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*
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* =====================================================================================
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*/
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#include <gk/gl/Texture.hpp>
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#include <gk/resource/ResourceHandler.hpp>
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#include "Color.hpp"
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#include "Text.hpp"
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Text::Text() : m_texture(gk::ResourceHandler::getInstance().get<gk::Texture>("texture-font")) {
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updateCharWidth();
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}
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void Text::setText(const std::string &text) {
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if (m_text != text) {
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m_text = text;
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updateTextSprites();
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}
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}
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void Text::setColor(const gk::Color &color) {
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if (m_color != color) {
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m_color = color;
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updateTextSprites();
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}
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}
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void Text::draw(gk::RenderTarget &target, gk::RenderStates states) const {
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states.transform *= getTransform();
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for(const gk::Sprite &sprite : m_textSprites) {
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target.draw(sprite, states);
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}
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}
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// FIXME: USE A VBO INSTEAD
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void Text::updateTextSprites() {
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m_textSprites.clear();
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int x = 0;
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int y = 0;
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int maxX = 0;
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gk::Color color = gk::Color{70, 70, 70, 255};
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for(char c : m_text) {
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if (c == '\n') {
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y += 9;
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x = 0;
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continue;
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}
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gk::Sprite sprite{"texture-font", 8, 8};
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sprite.setCurrentFrame(c);
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sprite.setPosition(x + 1, y + 1, 0);
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sprite.setColor(color);
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m_textSprites.emplace_back(std::move(sprite));
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x += m_charWidth[(u8)c];
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}
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x = 0;
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y = 0;
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color = m_color;
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for(char c : m_text) {
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if (c == '\n') {
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maxX = std::max(x, maxX);
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y += 9;
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x = 0;
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continue;
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}
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gk::Sprite sprite{"texture-font", 8, 8};
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sprite.setCurrentFrame(c);
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sprite.setPosition(x, y, 0);
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if (c == '[')
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color = Color::Blue;
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sprite.setColor(color);
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m_textSprites.emplace_back(std::move(sprite));
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x += m_charWidth[(u8)c];
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}
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m_size.x = std::max(x, maxX);
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m_size.y = 8 + y * 9;
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}
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// FIXME: Since I use the font from Minecraft assets, I needed to use
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// this piece of code to make it look good
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// I'll remove it later anyway
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void Text::updateCharWidth() {
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const int width = m_texture.getSize().x;
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const int height = m_texture.getSize().y;
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unsigned int *data = new unsigned int[width * height];
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gk::Texture::bind(&m_texture);
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glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, data);
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gk::Texture::bind(nullptr);
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const int charMaxHeight = height / 16;
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const int charMaxWidth = width / 16;
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for (int i = 0 ; i < 256 ; ++i) {
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if (i == ' ') {
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m_charWidth[i] = 4;
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continue;
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}
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int charX = i % 16;
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int charY = i / 16;
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if (i == 32)
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m_charWidth[i] = 4;
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int l1;
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for (l1 = charMaxWidth - 1 ; l1 >= 0 ; --l1) {
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int i2 = charX * charMaxWidth + l1;
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bool flag1 = true;
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for (int j2 = 0 ; j2 < charMaxHeight && flag1 ; ++j2) {
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int k2 = (charY * charMaxWidth + j2) * width;
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if ((data[i2 + k2] & 255) != 0)
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flag1 = false;
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}
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if (!flag1) break;
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}
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++l1;
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m_charWidth[i] = 0.5f + l1 * (8.0f / charMaxWidth) + 1;
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}
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delete[] data;
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}
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