Changing examples to use makefile

- Testing a modified version of the makefile from raylib Instead of multiple project files for examples.
- Fixed readme example

Examples/textures/textures_image_drawing.cs

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+using Raylib;
+using static Raylib.Raylib;
+
+public partial class Examples
+{
+    /*******************************************************************************************
    *
    *   raylib [textures] example - Image loading and drawing on it
    *
    *   NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
    *
    *   This example has been created using raylib 1.4 (www.raylib.com)
    *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
    *
    *   Copyright (c) 2016 Ramon Santamaria (@raysan5)
    *
    ********************************************************************************************/
    
    
    public static void Main()
    {
        // Initialization
        //--------------------------------------------------------------------------------------
        int screenWidth = 800;
        int screenHeight = 450;
    
        InitWindow(screenWidth, screenHeight, "raylib [textures] example - image drawing");
    
        // NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
    
        Image cat = LoadImage("resources/cat.png");             // Load image in CPU memory (RAM)
        ImageCrop(&cat, new Rectangle( 100, 10, 280, 380 ););      // Crop an image piece
        ImageFlipHorizontal(&cat);                              // Flip cropped image horizontally
        ImageResize(&cat, 150, 200);                            // Resize flipped-cropped image
        
        Image parrots = LoadImage("resources/parrots.png");     // Load image in CPU memory (RAM)
        
        // Draw one image over the other with a scaling of 1.5f
        ImageDraw(&parrots, cat, new Rectangle( 0, 0, cat.width, cat.height }, (Rectangle){ 30, 40, cat.width*1.5f, cat.height*1.5f ););
        ImageCrop(&parrots, new Rectangle( 0, 50, parrots.width, parrots.height - 100 );); // Crop resulting image
        
        UnloadImage(cat);       // Unload image from RAM
        
        // Load custom font for frawing on image
        Font font = LoadFont("resources/custom_jupiter_crash.png");
        
        // Draw over image using custom font
        ImageDrawTextEx(&parrots, new Vector2( 300, 230 );, font, "PARROTS & CAT", font.baseSize, -2, WHITE);
        
        UnloadFont(font); // Unload custom spritefont (already drawn used on image)
    
        Texture2D texture = LoadTextureFromImage(parrots);      // Image converted to texture, uploaded to GPU memory (VRAM)
        UnloadImage(parrots);   // Once image has been converted to texture and uploaded to VRAM, it can be unloaded from RAM
        
        SetTargetFPS(60);
        //---------------------------------------------------------------------------------------
    
        // Main game loop
        while (!WindowShouldClose())    // Detect window close button or ESC key
        {
            // Update
            //----------------------------------------------------------------------------------
            // TODO: Update your variables here
            //----------------------------------------------------------------------------------
    
            // Draw
            //----------------------------------------------------------------------------------
            BeginDrawing();
    
                ClearBackground(RAYWHITE);
    
                DrawTexture(texture, screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2 - 40, WHITE);
                DrawRectangleLines(screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2 - 40, texture.width, texture.height, DARKGRAY);
    
                DrawText("We are drawing only one texture from various images composed!", 240, 350, 10, DARKGRAY);
                DrawText("Source images have been cropped, scaled, flipped and copied one over the other.", 190, 370, 10, DARKGRAY);
    
            EndDrawing();
            //----------------------------------------------------------------------------------
        }
    
        // De-Initialization
        //--------------------------------------------------------------------------------------
        UnloadTexture(texture);       // Texture unloading
    
        CloseWindow();                // Close window and OpenGL context
        //--------------------------------------------------------------------------------------
    
        return 0;
    }    
+}

Examples/textures/textures_image_generation.cs

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+using Raylib;
+using static Raylib.Raylib;
+
+public partial class Examples
+{
+    /*******************************************************************************************
    *
    *   raylib [textures] example - Procedural images generation
    *
    *   This example has been created using raylib 1.8 (www.raylib.com)
    *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
    *
    *   Copyright (c) 2O17 Wilhem Barbier (@nounoursheureux)
    *
    ********************************************************************************************/
    
    
    public const #define NUM_TEXTURES  7      // Currently we have 7 generation algorithms

    public static void Main()
    {
        // Initialization
        //--------------------------------------------------------------------------------------
        int screenWidth = 800;
        int screenHeight = 450;
    
        InitWindow(screenWidth, screenHeight, "raylib [textures] example - procedural images generation");
    
        Image verticalGradient = GenImageGradientV(screenWidth, screenHeight, RED, BLUE);
        Image horizontalGradient = GenImageGradientH(screenWidth, screenHeight, RED, BLUE);
        Image radialGradient = GenImageGradientRadial(screenWidth, screenHeight, 0.0f, WHITE, BLACK);
        Image checked = GenImageChecked(screenWidth, screenHeight, 32, 32, RED, BLUE);
        Image whiteNoise = GenImageWhiteNoise(screenWidth, screenHeight, 0.5f);
        Image perlinNoise = GenImagePerlinNoise(screenWidth, screenHeight, 50, 50, 4.0f);
        Image cellular = GenImageCellular(screenWidth, screenHeight, 32);
    
        Texture2D[] textures = new Texture2D[NUM_TEXTURES];
        textures[0] = LoadTextureFromImage(verticalGradient);
        textures[1] = LoadTextureFromImage(horizontalGradient);
        textures[2] = LoadTextureFromImage(radialGradient);
        textures[3] = LoadTextureFromImage(checked);
        textures[4] = LoadTextureFromImage(whiteNoise);
        textures[5] = LoadTextureFromImage(perlinNoise);
        textures[6] = LoadTextureFromImage(cellular);
        
        // Unload image data (CPU RAM)
        UnloadImage(verticalGradient);
        UnloadImage(horizontalGradient);
        UnloadImage(radialGradient);
        UnloadImage(checked);
        UnloadImage(whiteNoise);
        UnloadImage(perlinNoise);
        UnloadImage(cellular);
    
        int currentTexture = 0;
        
        SetTargetFPS(60);
        //---------------------------------------------------------------------------------------
        
        // Main game loop
        while (!WindowShouldClose())
        {
            // Update
            //----------------------------------------------------------------------------------
            if (IsMouseButtonPressed((int)Mouse.LEFT_BUTTON) || IsKeyPressed((int)Key.RIGHT))
            {
                currentTexture = (currentTexture + 1)%NUM_TEXTURES; // Cycle between the textures
            }
            //----------------------------------------------------------------------------------
    
            // Draw
            //----------------------------------------------------------------------------------
            BeginDrawing();
            
                ClearBackground(RAYWHITE);
                
                DrawTexture(textures[currentTexture], 0, 0, WHITE);
                
                DrawRectangle(30, 400, 325, 30, Fade(SKYBLUE, 0.5f));
                DrawRectangleLines(30, 400, 325, 30, Fade(WHITE, 0.5f));
                DrawText("MOUSE LEFT BUTTON to CYCLE PROCEDURAL TEXTURES", 40, 410, 10, WHITE);
                
                switch(currentTexture)
                {
                    case 0: DrawText("VERTICAL GRADIENT", 560, 10, 20, RAYWHITE); break;
                    case 1: DrawText("HORIZONTAL GRADIENT", 540, 10, 20, RAYWHITE); break;
                    case 2: DrawText("RADIAL GRADIENT", 580, 10, 20, LIGHTGRAY); break;
                    case 3: DrawText("CHECKED", 680, 10, 20, RAYWHITE); break;
                    case 4: DrawText("WHITE NOISE", 640, 10, 20, RED); break;
                    case 5: DrawText("PERLIN NOISE", 630, 10, 20, RAYWHITE); break;
                    case 6: DrawText("CELLULAR", 670, 10, 20, RAYWHITE); break;
                    default: break;
                }
                
            EndDrawing();
            //----------------------------------------------------------------------------------
        }
    
        // De-Initialization
        //--------------------------------------------------------------------------------------
           
        // Unload textures data (GPU VRAM)
        for (int i = 0; i < NUM_TEXTURES; i++) UnloadTexture(textures[i]);
        
        CloseWindow();                // Close window and OpenGL context
        //--------------------------------------------------------------------------------------
        
        return 0;
    }
        
+}

Examples/textures/textures_image_loading.cs

@@ -0,0 +1,7 @@
+using Raylib;
+using static Raylib.Raylib;
+
+public partial class Examples
+{
+    /*******************************************************************************************
    *
    *   raylib [textures] example - Image loading and texture creation
    *
    *   NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
    *
    *   This example has been created using raylib 1.3 (www.raylib.com)
    *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
    *
    *   Copyright (c) 2015 Ramon Santamaria (@raysan5)
    *
    ********************************************************************************************/
    
    
    public static void Main()
    {
        // Initialization
        //--------------------------------------------------------------------------------------
        int screenWidth = 800;
        int screenHeight = 450;
    
        InitWindow(screenWidth, screenHeight, "raylib [textures] example - image loading");
    
        // NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
    
        Image image = LoadImage("resources/raylib_logo.png");     // Loaded in CPU memory (RAM)
        Texture2D texture = LoadTextureFromImage(image);          // Image converted to texture, GPU memory (VRAM)
    
        UnloadImage(image);   // Once image has been converted to texture and uploaded to VRAM, it can be unloaded from RAM
        //---------------------------------------------------------------------------------------
    
        // Main game loop
        while (!WindowShouldClose())    // Detect window close button or ESC key
        {
            // Update
            //----------------------------------------------------------------------------------
            // TODO: Update your variables here
            //----------------------------------------------------------------------------------
    
            // Draw
            //----------------------------------------------------------------------------------
            BeginDrawing();
    
                ClearBackground(RAYWHITE);
    
                DrawTexture(texture, screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2, WHITE);
    
                DrawText("this IS a texture loaded from an image!", 300, 370, 10, GRAY);
    
            EndDrawing();
            //----------------------------------------------------------------------------------
        }
    
        // De-Initialization
        //--------------------------------------------------------------------------------------
        UnloadTexture(texture);       // Texture unloading
    
        CloseWindow();                // Close window and OpenGL context
        //--------------------------------------------------------------------------------------
    
        return 0;
    }    
+}

Examples/textures/textures_image_text.cs

@@ -0,0 +1,7 @@
+using Raylib;
+using static Raylib.Raylib;
+
+public partial class Examples
+{
+    /*******************************************************************************************
    *
    *   raylib [texture] example - Image text drawing using TTF generated spritefont
    *
    *   This example has been created using raylib 1.8 (www.raylib.com)
    *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
    *
    *   Copyright (c) 2017 Ramon Santamaria (@raysan5)
    *
    ********************************************************************************************/
    
    
    public static void Main()
    {
        // Initialization
        //--------------------------------------------------------------------------------------
        int screenWidth = 800;
        int screenHeight = 450;
    
        InitWindow(screenWidth, screenHeight, "raylib [texture] example - image text drawing");
        
        // TTF Font loading with custom generation parameters
        Font font = LoadFontEx("resources/KAISG.ttf", 64, 95, 0);
        
        Image parrots = LoadImage("resources/parrots.png"); // Load image in CPU memory (RAM)
    
        // Draw over image using custom font
        ImageDrawTextEx(&parrots, new Vector2( 20, 20 );, font, "[Parrots font drawing]", font.baseSize, 0, WHITE);
    
        Texture2D texture = LoadTextureFromImage(parrots);  // Image converted to texture, uploaded to GPU memory (VRAM)
        UnloadImage(parrots);   // Once image has been converted to texture and uploaded to VRAM, it can be unloaded from RAM
        
        Vector2 position = { screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2 - 20 };
        
        bool showFont = false;
    
        SetTargetFPS(60);
        //--------------------------------------------------------------------------------------
    
        // Main game loop
        while (!WindowShouldClose())    // Detect window close button or ESC key
        {
            // Update
            //----------------------------------------------------------------------------------
            if (IsKeyDown((int)Key.SPACE)) showFont = true;
            else showFont = false;
            //----------------------------------------------------------------------------------
    
            // Draw
            //----------------------------------------------------------------------------------
            BeginDrawing();
    
                ClearBackground(RAYWHITE);
    
                if (!showFont)
                {
                    // Draw texture with text already drawn inside
                    DrawTextureV(texture, position, WHITE);
                    
                    // Draw text directly using sprite font
                    DrawTextEx(font, "[Parrots font drawing]", (Vector2){ position.x + 20, 
                               position.y + 20 + 280 }, font.baseSize, 0, WHITE);
                }
                else DrawTexture(font.texture, screenWidth/2 - font.texture.width/2, 50, BLACK);
                
                DrawText("PRESS SPACE to SEE USED SPRITEFONT ", 290, 420, 10, DARKGRAY);
            
            EndDrawing();
            //----------------------------------------------------------------------------------
        }
    
        // De-Initialization
        //--------------------------------------------------------------------------------------
        UnloadTexture(texture);     // Texture unloading
            
        UnloadFont(font);     // Unload custom spritefont
        
        CloseWindow();              // Close window and OpenGL context
        //--------------------------------------------------------------------------------------
    
        return 0;
    }    
+}