IDK OpenGL TextureMap 1

OGL_TexMap1.cpp

// For Linux, NOT CROSS-PLATFORM
#include <GL/glut.h>
#include <SOIL/SOIL.h>
#include <iostream>

GLuint texImg;

int loadedImageWidth;
int loadedImageHeight;
unsigned char *loadedImageData;

void loadTexture() {
    loadedImageData =
        SOIL_load_image("image.bmp", &loadedImageWidth, &loadedImageHeight, 0, SOIL_LOAD_RGB);

    if (loadedImageData == NULL) {
        std::cout << "Unable to load image." << std::endl;
    }

    glActiveTexture(GL_TEXTURE0);
    glGenTextures(1, &texImg);

    glBindTexture(GL_TEXTURE_2D, texImg);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexImage2D(GL_TEXTURE_2D,
            0,
            GL_RGB,
            loadedImageWidth,
            loadedImageHeight,
            0,
            GL_RGB,
            GL_UNSIGNED_BYTE,
            loadedImageData);

    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);

    int uniform_ImageTex = 1;
}

void display(void) {
    glClearColor(0,0,0,0);
    glClear(GL_COLOR_BUFFER_BIT);

    glEnable(GL_TEXTURE_2D);

    // Draw a square
    glBegin(GL_QUADS);
        // glColor3f(1,0,0);

        glTexCoord2f(0, 0);
        glVertex2f(-0.5, +0.5);

        glTexCoord2f(1, 0);
        glVertex2f(+0.5, +0.5);

        glTexCoord2f(1, 1);
        glVertex2f(+0.5, -0.5);
        
        glTexCoord2f(0, 1);
        glVertex2f(-0.5, -0.5);
    glEnd();

    glDisable(GL_TEXTURE_2D);

    glutSwapBuffers();
}

void reshape(int w, int h) {
}

int main(int argc, char **argv) {
    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);  

    glutInitWindowPosition(200,200);
    glutInitWindowSize(512,512);
    glutCreateWindow("Hello OpenGL");

    glutDisplayFunc(display);
    glutReshapeFunc(reshape);

    loadTexture();

    glutMainLoop();

    return 0;
}

http://stackoverflow.com/questions/5681948/multiple-textures-opengl-glut-c

http://www.opengl-tutorial.org/intermediate-tutorials/tutorial-14-render-to-texture/

Some of this is fairly basic. I should probably read the Red Book?