BLT-With-Graphics-Template/tests/src/main.cpp

#include <blt/gfx/window.h>
#include <blt/gfx/shader.h>
#include <blt/gfx/texture.h>
#include <blt/gfx/model.h>
#include <blt/std/logging.h>
#include <imgui.h>
#include "blt/gfx/imgui/IconsFontAwesome5.h"

#include <shaders/test.vert>
#include <shaders/test.frag>

const float raw_vertices[18] = {
        // first triangle
        0.5f,  0.5f, 0.0f,  // top right
        0.5f, -0.5f, 0.0f,  // bottom right
        -0.5f,  0.5f, 0.0f,  // top left
        // second triangle
        0.5f, -0.5f, 0.0f,  // bottom right
        -0.5f, -0.5f, 0.0f,  // bottom left
        -0.5f,  0.5f, 0.0f   // top left
};

float vertices[20] = {
        // positions        // texture coords
        0.5f,  0.5f, 0.0f,      1.0f, 1.0f,   // top right
        0.5f, -0.5f, 0.0f,      1.0f, 0.0f,   // bottom right
        -0.5f, -0.5f, 0.0f,     0.0f, 0.0f,   // bottom left
        -0.5f,  0.5f, 0.0f,     0.0f, 1.0f    // top left
};
const unsigned int indices[6] = {  // note that we start from 0!
        0, 1, 3,   // first triangle
        1, 2, 3    // second triangle
};

blt::gfx::vertex_array* vao;
blt::gfx::shader_t* shader;
blt::gfx::texture_gl2D* texture;

void init()
{
    using namespace blt::gfx;
    
    vbo_t vertices_vbo;
    vbo_t indices_vbo;
    
    vertices_vbo.create();
    indices_vbo.create(GL_ELEMENT_ARRAY_BUFFER);
    
    vertices_vbo.allocate(sizeof(vertices), vertices);
    indices_vbo.allocate(sizeof(indices), indices);
    
    vao = new vertex_array();
    vao->bindVBO(vertices_vbo, 0, 3, GL_FLOAT, 5 * sizeof(float), 0);
    vao->bindVBO(vertices_vbo, 1, 2, GL_FLOAT, 5 * sizeof(float), 3 * sizeof(float));
    vao->bindElement(indices_vbo);
    
    shader = new shader_t(shader_test_vert, shader_test_frag);
    shader->bindAttribute(0, "vertex");
    shader->bindAttribute(1, "uv_in");
    
    texture_file file("../resources/textures/cumdollar.jpg");
    texture = new texture_gl2D(file.texture());
}

void update(std::int32_t width, std::int32_t height)
{
    ImGui::ShowDemoWindow();
    ImGui::Text("%s among %d items", ICON_FA_FILE, 0);
    ImGui::Button(ICON_FA_SEARCH " Search");
    ImGui::End();
    
    
    shader->bind();
    
    glActiveTexture(GL_TEXTURE0);
    texture->bind();
    
    vao->bind();
    glEnableVertexAttribArray(0);
    glEnableVertexAttribArray(1);
    glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
}

int main()
{
    blt::gfx::init(blt::gfx::window_data{"My Sexy Window", init, update}.setSyncInterval(1));
    delete vao;
    delete shader;
    delete texture;
    blt::gfx::cleanup();
    return 0;
}