Add raylib lua examples

examples/textures_raw_data.lua

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+-------------------------------------------------------------------------------------------
+--
+--  raylib [textures] example - Load textures from raw data
+--
+--  NOTE: Images are loaded in CPU memory (RAM) textures are loaded in GPU memory (VRAM)
+--
+--  This example has been created using raylib 1.6 (www.raylib.com)
+--  raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+--
+--  Copyright (c) 2014-2016 Ramon Santamaria (@raysan5)
+--
+-------------------------------------------------------------------------------------------
+
+--#include <stdlib.h>     -- Required for malloc() and free()
+
+-- Initialization
+-------------------------------------------------------------------------------------------
+local screenWidth = 800
+local screenHeight = 450
+
+InitWindow(screenWidth, screenHeight, "raylib [textures] example - texture from raw data")
+
+-- NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
+
+-- Load RAW image data (512x512, 32bit RGBA, no file header)
+local sonicRaw = LoadImageRaw("resources/texture_formats/sonic_R8G8B8A8.raw", 512, 512, TextureFormat.UNCOMPRESSED_R8G8B8A8, 0)
+local sonic = LoadTextureFromImage(sonicRaw)   -- Upload CPU (RAM) image to GPU (VRAM)
+UnloadImage(sonicRaw)                              -- Unload CPU (RAM) image data
+
+-- Generate a checked texture by code (1024x1024 pixels)
+local width = 1024
+local height = 1024
+
+-- Dynamic memory allocation to store pixels data (Color type)
+local pixels = {}
+
+for y = 1, height do
+    for x = 1, width do
+        if (((x/32+y/32)/1)%2 == 0) then pixels[y*height + x] = DARKBLUE
+        else pixels[y*height + x] = SKYBLUE end
+    end
+end
+
+-- Load pixels data into an image structure and create texture
+local checkedIm = LoadImageEx(pixels, width, height)
+local checked = LoadTextureFromImage(checkedIm)
+UnloadImage(checkedIm)     -- Unload CPU (RAM) image data
+
+-- Dynamic memory must be freed after using it
+--free(pixels)               -- Unload CPU (RAM) pixels data
+-------------------------------------------------------------------------------------------
+
+-- Main game loop
+while not WindowShouldClose() do            -- Detect window close button or ESC key
+    -- Update
+    ---------------------------------------------------------------------------------------
+    -- TODO: Update your variables here
+    ---------------------------------------------------------------------------------------
+
+    -- Draw
+    ---------------------------------------------------------------------------------------
+    BeginDrawing()
+
+        ClearBackground(RAYWHITE)
+
+        DrawTexture(checked, screenWidth/2 - checked.width/2, screenHeight/2 - checked.height/2, Fade(WHITE, 0.3))
+        DrawTexture(sonic, 330, -20, WHITE)
+
+        DrawText("CHECKED TEXTURE ", 84, 100, 30, DARKBLUE)
+        DrawText("GENERATED by CODE", 72, 164, 30, DARKBLUE)
+        DrawText("and RAW IMAGE LOADING", 46, 226, 30, DARKBLUE)
+
+    EndDrawing()
+    ---------------------------------------------------------------------------------------
+end
+
+-- De-Initialization
+-------------------------------------------------------------------------------------------
+UnloadTexture(sonic)       -- Texture unloading
+UnloadTexture(checked)     -- Texture unloading
+
+CloseWindow()              -- Close window and OpenGL context
+-------------------------------------------------------------------------------------------