#include <windows.h>        // Header File For Windows
#include <stdio.h>            // Header File For Standard Input/Output
#include <gl/gl.h>            // Header File For The OpenGL32 Library
#include <gl/glaux.h>        // Header File For The Glaux Library
#include <gl/glu.h>            // Header File For The GLu32 Library


HDC            hDC=NULL;        // Private GDI Device Context
HGLRC        hRC=NULL;        // Permanent Rendering Context
HWND        hWnd=NULL;        // Holds Our Window Handle
HINSTANCE    hInstance;        // Holds The Instance Of The Application
void DrawCube();
void DrawGround();
bool    keys[256];            // Array Used For The Keyboard Routine
bool    active=TRUE;        // Window Active Flag Set To TRUE By Default
bool    fullscreen=TRUE;    // Fullscreen Flag Set To Fullscreen Mode By Default

GLfloat    rot;                // X Rotation ( NEW )


GLuint    texture[2];            // Storage For One Texture ( NEW )

LRESULT    CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);    // Declaration For WndProc

AUX_RGBImageRec *LoadBMP(char *Filename)                // Loads A Bitmap Image
{
    FILE *File=NULL;                                    // File Handle

    if (!Filename)                                        // Make Sure A Filename Was Given
    {
        return NULL;                                    // If Not Return NULL
    }

    File=fopen(Filename,"r");                            // Check To See If The File Exists

    if (File)                                            // Does The File Exist?
    {
        fclose(File);                                    // Close The Handle
        return auxDIBImageLoad(Filename);                // Load The Bitmap And Return A Pointer
    }

    return NULL;                                        // If Load Failed Return NULL
}

int LoadGLTextures()                                    // Load Bitmaps And Convert To Textures
{
    int Status=FALSE;                                    // Status Indicator

    AUX_RGBImageRec *TextureImage[2];                    // Create Storage Space For The Texture

    memset(TextureImage,0,sizeof(void *)*1);               // Set The Pointer To NULL

    // Load The Bitmap, Check For Errors, If Bitmap's Not Found Quit
    if (TextureImage[0]=LoadBMP("cube.bmp"))
    {
        Status=TRUE;                                    // Set The Status To TRUE

        glGenTextures(1, &texture[0]);                    // Create The Texture

        // Typical Texture Generation Using Data From The Bitmap
        glBindTexture(GL_TEXTURE_2D, texture[0]);
        glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
    }

    if (TextureImage[0])                                    // If Texture Exists
    {
        if (TextureImage[0]->data)                            // If Texture Image Exists
        {
            free(TextureImage[0]->data);                    // Free The Texture Image Memory
        }

        free(TextureImage[0]);                                // Free The Image Structure
    }
    if (TextureImage[1]=LoadBMP("ground.bmp"))
    {
        Status=TRUE;                                    // Set The Status To TRUE

        glGenTextures(1, &texture[1]);                    // Create The Texture

        // Typical Texture Generation Using Data From The Bitmap
        glBindTexture(GL_TEXTURE_2D, texture[1]);
        glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[1]->sizeX, TextureImage[1]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[1]->data);
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
    }

    if (TextureImage[1])                                    // If Texture Exists
    {
        if (TextureImage[1]->data)                            // If Texture Image Exists
        {
            free(TextureImage[1]->data);                    // Free The Texture Image Memory
        }

        free(TextureImage[1]);                                // Free The Image Structure
    }
    return Status;                                        // Return The Status
}


void DrawGround()
{
   glPushMatrix();

      // Activate texture
       glBindTexture(GL_TEXTURE_2D, texture[1]);

      // Draw on the ground
      glBegin(GL_QUADS);
         glTexCoord2f(0.0, 0.0); glVertex3f(2.0f, -0.02f, 2.0f);
         glTexCoord2f(1.0, 0.0); glVertex3f(-2.0f, -0.02f, 2.0f);
         glTexCoord2f(1.0, 1.0); glVertex3f(-2.0f, -0.02f, -2.0f);
         glTexCoord2f(0.0, 1.0); glVertex3f(2.0f, -0.02f, -2.0f);
      glEnd();

   glPopMatrix();
}