/**********************************************************************************************
*
*   raylib - A simple and easy-to-use library to enjoy videogames programming (www.raylib.com)
*
*   FEATURES:
*       - NO external dependencies, all required libraries included with raylib
*       - Multiplatform: Windows, Linux, FreeBSD, OpenBSD, NetBSD, DragonFly, MacOS, UWP, Android, Raspberry Pi, HTML5.
*       - Written in plain C code (C99) in PascalCase/camelCase notation
*       - Hardware accelerated with OpenGL (1.1, 2.1, 3.3 or ES2 - choose at compile)
*       - Unique OpenGL abstraction layer (usable as standalone module): [rlgl]
*       - Multiple Fonts formats supported (TTF, XNA fonts, AngelCode fonts)
*       - Outstanding texture formats support, including compressed formats (DXT, ETC, ASTC)
*       - Full 3d support for 3d Shapes, Models, Billboards, Heightmaps and more!
*       - Flexible Materials system, supporting classic maps and PBR maps
*       - Skeletal Animation support (CPU bones-based animation)
*       - Shaders support, including Model shaders and Postprocessing shaders
*       - Powerful math module for Vector, Matrix and Quaternion operations: [raymath]
*       - Audio loading and playing with streaming support (WAV, OGG, MP3, FLAC, XM, MOD)
*       - VR stereo rendering with configurable HMD device parameters
*       - Bindings to multiple programming languages available!
*
*   NOTES:
*       One custom font is loaded by default when InitWindow() [core]
*       If using OpenGL 3.3 or ES2, one default shader is loaded automatically (internally defined) [rlgl]
*       If using OpenGL 3.3 or ES2, several vertex buffers (VAO/VBO) are created to manage lines-triangles-quads
*
*   DEPENDENCIES (included):
*       [core] rglfw (github.com/glfw/glfw) for window/context management and input (only PLATFORM_DESKTOP)
*       [rlgl] glad (github.com/Dav1dde/glad) for OpenGL 3.3 extensions loading (only PLATFORM_DESKTOP)
*       [raudio] miniaudio (github.com/dr-soft/miniaudio) for audio device/context management
*
*   OPTIONAL DEPENDENCIES (included):
*       [core] rgif (Charlie Tangora, Ramon Santamaria) for GIF recording
*       [textures] stb_image (Sean Barret) for images loading (BMP, TGA, PNG, JPEG, HDR...)
*       [textures] stb_image_write (Sean Barret) for image writting (BMP, TGA, PNG, JPG)
*       [textures] stb_image_resize (Sean Barret) for image resizing algorithms
*       [textures] stb_perlin (Sean Barret) for Perlin noise image generation
*       [text] stb_truetype (Sean Barret) for ttf fonts loading
*       [text] stb_rect_pack (Sean Barret) for rectangles packing
*       [models] par_shapes (Philip Rideout) for parametric 3d shapes generation
*       [models] tinyobj_loader_c (Syoyo Fujita) for models loading (OBJ, MTL)
*       [models] cgltf (Johannes Kuhlmann) for models loading (glTF)
*       [raudio] stb_vorbis (Sean Barret) for OGG audio loading
*       [raudio] dr_flac (David Reid) for FLAC audio file loading
*       [raudio] dr_mp3 (David Reid) for MP3 audio file loading
*       [raudio] jar_xm (Joshua Reisenauer) for XM audio module loading
*       [raudio] jar_mod (Joshua Reisenauer) for MOD audio module loading
*
*
*   LICENSE: zlib/libpng
*
*   raylib is licensed under an unmodified zlib/libpng license, which is an OSI-certified,
*   BSD-like license that allows static linking with closed source software:
*
*   Copyright (c) 2013-2020 Ramon Santamaria (@raysan5)
*
*   This software is provided "as-is", without any express or implied warranty. In no event
*   will the authors be held liable for any damages arising from the use of this software.
*
*   Permission is granted to anyone to use this software for any purpose, including commercial
*   applications, and to alter it and redistribute it freely, subject to the following restrictions:
*
*     1. The origin of this software must not be misrepresented; you must not claim that you
*     wrote the original software. If you use this software in a product, an acknowledgment
*     in the product documentation would be appreciated but is not required.
*
*     2. Altered source versions must be plainly marked as such, and must not be misrepresented
*     as being the original software.
*
*     3. This notice may not be removed or altered from any source distribution.
*
**********************************************************************************************/

#ifndef RAYLIB_H
#define RAYLIB_H

#include <stdarg.h>     // Required for: va_list - Only used by TraceLogCallback

#if defined(_WIN32)
    // Microsoft attibutes to tell compiler that symbols are imported/exported from a .dll
    #if defined(BUILD_LIBTYPE_SHARED)
        #define RLAPI __declspec(dllexport)     // We are building raylib as a Win32 shared library (.dll)
    #elif defined(USE_LIBTYPE_SHARED)
        #define RLAPI __declspec(dllimport)     // We are using raylib as a Win32 shared library (.dll)
    #else
        #define RLAPI   // We are building or using raylib as a static library
    #endif
#else
    #define RLAPI       // We are building or using raylib as a static library (or Linux shared library)
#endif

//----------------------------------------------------------------------------------
// Some basic Defines
//----------------------------------------------------------------------------------
#ifndef PI
    #define PI 3.14159265358979323846f
#endif

#define DEG2RAD (PI/180.0f)
#define RAD2DEG (180.0f/PI)

// Allow custom memory allocators
#ifndef RL_MALLOC
    #define RL_MALLOC(sz)       malloc(sz)
#endif
#ifndef RL_CALLOC
    #define RL_CALLOC(n,sz)     calloc(n,sz)
#endif
#ifndef RL_REALLOC
    #define RL_REALLOC(ptr,sz)  realloc(ptr,sz)
#endif
#ifndef RL_FREE
    #define RL_FREE(ptr)        free(ptr)
#endif

// NOTE: MSC C++ compiler does not support compound literals (C99 feature)
// Plain structures in C++ (without constructors) can be initialized from { } initializers.
#if defined(__cplusplus)
    #define CLITERAL(type)      type
#else
    #define CLITERAL(type)      (type)
#endif

// Some Basic Colors
// NOTE: Custom raylib color palette for amazing visuals on WHITE background
#define LIGHTGRAY  CLITERAL(Color){ 200, 200, 200, 255 }   // Light Gray
#define GRAY       CLITERAL(Color){ 130, 130, 130, 255 }   // Gray
#define DARKGRAY   CLITERAL(Color){ 80, 80, 80, 255 }      // Dark Gray
#define YELLOW     CLITERAL(Color){ 253, 249, 0, 255 }     // Yellow
#define GOLD       CLITERAL(Color){ 255, 203, 0, 255 }     // Gold
#define ORANGE     CLITERAL(Color){ 255, 161, 0, 255 }     // Orange
#define PINK       CLITERAL(Color){ 255, 109, 194, 255 }   // Pink
#define RED        CLITERAL(Color){ 230, 41, 55, 255 }     // Red
#define MAROON     CLITERAL(Color){ 190, 33, 55, 255 }     // Maroon
#define GREEN      CLITERAL(Color){ 0, 228, 48, 255 }      // Green
#define LIME       CLITERAL(Color){ 0, 158, 47, 255 }      // Lime
#define DARKGREEN  CLITERAL(Color){ 0, 117, 44, 255 }      // Dark Green
#define SKYBLUE    CLITERAL(Color){ 102, 191, 255, 255 }   // Sky Blue
#define BLUE       CLITERAL(Color){ 0, 121, 241, 255 }     // Blue
#define DARKBLUE   CLITERAL(Color){ 0, 82, 172, 255 }      // Dark Blue
#define PURPLE     CLITERAL(Color){ 200, 122, 255, 255 }   // Purple
#define VIOLET     CLITERAL(Color){ 135, 60, 190, 255 }    // Violet
#define DARKPURPLE CLITERAL(Color){ 112, 31, 126, 255 }    // Dark Purple
#define BEIGE      CLITERAL(Color){ 211, 176, 131, 255 }   // Beige
#define BROWN      CLITERAL(Color){ 127, 106, 79, 255 }    // Brown
#define DARKBROWN  CLITERAL(Color){ 76, 63, 47, 255 }      // Dark Brown

#define WHITE      CLITERAL(Color){ 255, 255, 255, 255 }   // White
#define BLACK      CLITERAL(Color){ 0, 0, 0, 255 }         // Black
#define BLANK      CLITERAL(Color){ 0, 0, 0, 0 }           // Blank (Transparent)
#define MAGENTA    CLITERAL(Color){ 255, 0, 255, 255 }     // Magenta
#define RAYWHITE   CLITERAL(Color){ 245, 245, 245, 255 }   // My own White (raylib logo)

// Temporal hack to avoid breaking old codebases using
// deprecated raylib implementation of these functions
#define FormatText      TextFormat
#define LoadText        LoadFileText
#define GetExtension    GetFileExtension
#define GetImageData    LoadImageColors
//#define Fade(c, a)  ColorAlpha(c, a)

//----------------------------------------------------------------------------------
// Structures Definition
//----------------------------------------------------------------------------------
// Boolean type
#if defined(__STDC__) && __STDC_VERSION__ >= 199901L
    #include <stdbool.h>
#elif !defined(__cplusplus) && !defined(bool)
    typedef enum { false, true } bool;
#endif

// Vector2 type
typedef struct Vector2 {
    float x;
    float y;
} Vector2;

// Vector3 type
typedef struct Vector3 {
    float x;
    float y;
    float z;
} Vector3;

// Vector4 type
typedef struct Vector4 {
    float x;
    float y;
    float z;
    float w;
} Vector4;

// Quaternion type, same as Vector4
typedef Vector4 Quaternion;

// Matrix type (OpenGL style 4x4 - right handed, column major)
typedef struct Matrix {
    float m0, m4, m8, m12;
    float m1, m5, m9, m13;
    float m2, m6, m10, m14;
    float m3, m7, m11, m15;
} Matrix;

// Color type, RGBA (32bit)
typedef struct Color {
    unsigned char r;
    unsigned char g;
    unsigned char b;
    unsigned char a;
} Color;

// Rectangle type
typedef struct Rectangle {
    float x;
    float y;
    float width;
    float height;
} Rectangle;

// Image type, bpp always RGBA (32bit)
// NOTE: Data stored in CPU memory (RAM)
typedef struct Image {
    void *data;             // Image raw data
    int width;              // Image base width
    int height;             // Image base height
    int mipmaps;            // Mipmap levels, 1 by default
    int format;             // Data format (PixelFormat type)
} Image;

// Texture type
// NOTE: Data stored in GPU memory
typedef struct Texture {
    unsigned int id;        // OpenGL texture id
    int width;              // Texture base width
    int height;             // Texture base height
    int mipmaps;            // Mipmap levels, 1 by default
    int format;             // Data format (PixelFormat type)
} Texture;

// Texture2D type, same as Texture
typedef Texture Texture2D;

// TextureCubemap type, actually, same as Texture
typedef Texture TextureCubemap;

// RenderTexture type, for texture rendering
typedef struct RenderTexture {
    unsigned int id;        // OpenGL Framebuffer Object (FBO) id
    Texture texture;      // Color buffer attachment texture
    Texture depth;        // Depth buffer attachment texture
} RenderTexture;

// RenderTexture2D type, same as RenderTexture
typedef RenderTexture RenderTexture2D;

// N-Patch layout info
typedef struct NPatchInfo {
    Rectangle source;   // Region in the texture
    int left;              // left border offset
    int top;               // top border offset
    int right;             // right border offset
    int bottom;            // bottom border offset
    int type;              // layout of the n-patch: 3x3, 1x3 or 3x1
} NPatchInfo;

// Font character info
typedef struct CharInfo {
    int value;              // Character value (Unicode)
    int offsetX;            // Character offset X when drawing
    int offsetY;            // Character offset Y when drawing
    int advanceX;           // Character advance position X
    Image image;            // Character image data
} CharInfo;

// Font type, includes texture and charSet array data
typedef struct Font {
    int baseSize;           // Base size (default chars height)
    int charsCount;         // Number of characters
    int charsPadding;       // Padding around the chars
    Texture2D texture;      // Characters texture atlas
    Rectangle *recs;        // Characters rectangles in texture
    CharInfo *chars;        // Characters info data
} Font;

#define SpriteFont Font     // SpriteFont type fallback, defaults to Font

// Camera type, defines a camera position/orientation in 3d space
typedef struct Camera3D {
    Vector3 position;       // Camera position
    Vector3 target;         // Camera target it looks-at
    Vector3 up;             // Camera up vector (rotation over its axis)
    float fovy;             // Camera field-of-view apperture in Y (degrees) in perspective, used as near plane width in orthographic
    int type;               // Camera type, defines projection type: CAMERA_PERSPECTIVE or CAMERA_ORTHOGRAPHIC
} Camera3D;

typedef Camera3D Camera;    // Camera type fallback, defaults to Camera3D

// Camera2D type, defines a 2d camera
typedef struct Camera2D {
    Vector2 offset;         // Camera offset (displacement from target)
    Vector2 target;         // Camera target (rotation and zoom origin)
    float rotation;         // Camera rotation in degrees
    float zoom;             // Camera zoom (scaling), should be 1.0f by default
} Camera2D;

// Vertex data definning a mesh
// NOTE: Data stored in CPU memory (and GPU)
typedef struct Mesh {
    int vertexCount;        // Number of vertices stored in arrays
    int triangleCount;      // Number of triangles stored (indexed or not)

    // Default vertex data
    float *vertices;        // Vertex position (XYZ - 3 components per vertex) (shader-location = 0)
    float *texcoords;       // Vertex texture coordinates (UV - 2 components per vertex) (shader-location = 1)
    float *texcoords2;      // Vertex second texture coordinates (useful for lightmaps) (shader-location = 5)
    float *normals;         // Vertex normals (XYZ - 3 components per vertex) (shader-location = 2)
    float *tangents;        // Vertex tangents (XYZW - 4 components per vertex) (shader-location = 4)
    unsigned char *colors;  // Vertex colors (RGBA - 4 components per vertex) (shader-location = 3)
    unsigned short *indices;// Vertex indices (in case vertex data comes indexed)

    // Animation vertex data
    float *animVertices;    // Animated vertex positions (after bones transformations)
    float *animNormals;     // Animated normals (after bones transformations)
    int *boneIds;           // Vertex bone ids, up to 4 bones influence by vertex (skinning)
    float *boneWeights;     // Vertex bone weight, up to 4 bones influence by vertex (skinning)

    // OpenGL identifiers
    unsigned int vaoId;     // OpenGL Vertex Array Object id
    unsigned int *vboId;    // OpenGL Vertex Buffer Objects id (default vertex data)
} Mesh;

// Shader type (generic)
typedef struct Shader {
    unsigned int id;        // Shader program id
    int *locs;              // Shader locations array (MAX_SHADER_LOCATIONS)
} Shader;

// Material texture map
typedef struct MaterialMap {
    Texture2D texture;      // Material map texture
    Color color;            // Material map color
    float value;            // Material map value
} MaterialMap;

// Material type (generic)
typedef struct Material {
    Shader shader;          // Material shader
    MaterialMap *maps;      // Material maps array (MAX_MATERIAL_MAPS)
    float *params;          // Material generic parameters (if required)
} Material;

// Transformation properties
typedef struct Transform {
    Vector3 translation;    // Translation
    Quaternion rotation;    // Rotation
    Vector3 scale;          // Scale
} Transform;

// Bone information
typedef struct BoneInfo {
    char name[32];          // Bone name
    int parent;             // Bone parent
} BoneInfo;

// Model type
typedef struct Model {
    Matrix transform;       // Local transform matrix

    int meshCount;          // Number of meshes
    int materialCount;      // Number of materials
    Mesh *meshes;           // Meshes array
    Material *materials;    // Materials array
    int *meshMaterial;      // Mesh material number

    // Animation data
    int boneCount;          // Number of bones
    BoneInfo *bones;        // Bones information (skeleton)
    Transform *bindPose;    // Bones base transformation (pose)
} Model;

// Model animation
typedef struct ModelAnimation {
    int boneCount;          // Number of bones
    int frameCount;         // Number of animation frames
    BoneInfo *bones;        // Bones information (skeleton)
    Transform **framePoses; // Poses array by frame
} ModelAnimation;

// Ray type (useful for raycast)
typedef struct Ray {
    Vector3 position;       // Ray position (origin)
    Vector3 direction;      // Ray direction
} Ray;

// Raycast hit information
typedef struct RayHitInfo {
    bool hit;               // Did the ray hit something?
    float distance;         // Distance to nearest hit
    Vector3 position;       // Position of nearest hit
    Vector3 normal;         // Surface normal of hit
} RayHitInfo;

// Bounding box type
typedef struct BoundingBox {
    Vector3 min;            // Minimum vertex box-corner
    Vector3 max;            // Maximum vertex box-corner
} BoundingBox;

// Wave type, defines audio wave data
typedef struct Wave {
    unsigned int sampleCount;       // Total number of samples
    unsigned int sampleRate;        // Frequency (samples per second)
    unsigned int sampleSize;        // Bit depth (bits per sample): 8, 16, 32 (24 not supported)
    unsigned int channels;          // Number of channels (1-mono, 2-stereo)
    void *data;                     // Buffer data pointer
} Wave;

typedef struct rAudioBuffer rAudioBuffer;

// Audio stream type
// NOTE: Useful to create custom audio streams not bound to a specific file
typedef struct AudioStream {
    rAudioBuffer *buffer;           // Pointer to internal data used by the audio system

    unsigned int sampleRate;        // Frequency (samples per second)
    unsigned int sampleSize;        // Bit depth (bits per sample): 8, 16, 32 (24 not supported)
    unsigned int channels;          // Number of channels (1-mono, 2-stereo)
} AudioStream;

// Sound source type
typedef struct Sound {
    AudioStream stream;             // Audio stream
    unsigned int sampleCount;       // Total number of samples
} Sound;

// Music stream type (audio file streaming from memory)
// NOTE: Anything longer than ~10 seconds should be streamed
typedef struct Music {
    AudioStream stream;             // Audio stream
    unsigned int sampleCount;       // Total number of samples
    bool looping;                   // Music looping enable

    int ctxType;                    // Type of music context (audio filetype)
    void *ctxData;                  // Audio context data, depends on type
} Music;

// Head-Mounted-Display device parameters
typedef struct VrDeviceInfo {
    int hResolution;                // HMD horizontal resolution in pixels
    int vResolution;                // HMD vertical resolution in pixels
    float hScreenSize;              // HMD horizontal size in meters
    float vScreenSize;              // HMD vertical size in meters
    float vScreenCenter;            // HMD screen center in meters
    float eyeToScreenDistance;      // HMD distance between eye and display in meters
    float lensSeparationDistance;   // HMD lens separation distance in meters
    float interpupillaryDistance;   // HMD IPD (distance between pupils) in meters
    float lensDistortionValues[4];  // HMD lens distortion constant parameters
    float chromaAbCorrection[4];    // HMD chromatic aberration correction parameters
} VrDeviceInfo;

//----------------------------------------------------------------------------------
// Enumerators Definition
//----------------------------------------------------------------------------------
// System/Window config flags
// NOTE: Every bit registers one state (use it with bit masks)
// By default all flags are set to 0
typedef enum {
    FLAG_VSYNC_HINT         = 0x00000040,   // Set to try enabling V-Sync on GPU
    FLAG_FULLSCREEN_MODE    = 0x00000002,   // Set to run program in fullscreen
    FLAG_WINDOW_RESIZABLE   = 0x00000004,   // Set to allow resizable window
    FLAG_WINDOW_UNDECORATED = 0x00000008,   // Set to disable window decoration (frame and buttons)
    FLAG_WINDOW_HIDDEN      = 0x00000080,   // Set to hide window
    FLAG_WINDOW_MINIMIZED   = 0x00000200,   // Set to minimize window (iconify)
    FLAG_WINDOW_MAXIMIZED   = 0x00000400,   // Set to maximize window (expanded to monitor)
    FLAG_WINDOW_UNFOCUSED   = 0x00000800,   // Set to window non focused
    FLAG_WINDOW_TOPMOST     = 0x00001000,   // Set to window always on top
    FLAG_WINDOW_ALWAYS_RUN  = 0x00000100,   // Set to allow windows running while minimized
    FLAG_WINDOW_TRANSPARENT = 0x00000010,   // Set to allow transparent framebuffer
    FLAG_WINDOW_HIGHDPI     = 0x00002000,   // Set to support HighDPI
    FLAG_MSAA_4X_HINT       = 0x00000020,   // Set to try enabling MSAA 4X
    FLAG_INTERLACED_HINT    = 0x00010000    // Set to try enabling interlaced video format (for V3D)
} ConfigFlag;

// Trace log type
typedef enum {
    LOG_ALL = 0,        // Display all logs
    LOG_TRACE,
    LOG_DEBUG,
    LOG_INFO,
    LOG_WARNING,
    LOG_ERROR,
    LOG_FATAL,
    LOG_NONE            // Disable logging
} TraceLogType;

// Keyboard keys (US keyboard layout)
// NOTE: Use GetKeyPressed() to allow redefining
// required keys for alternative layouts
typedef enum {
    // Alphanumeric keys
    KEY_APOSTROPHE      = 39,
    KEY_COMMA           = 44,
    KEY_MINUS           = 45,
    KEY_PERIOD          = 46,
    KEY_SLASH           = 47,
    KEY_ZERO            = 48,
    KEY_ONE             = 49,
    KEY_TWO             = 50,
    KEY_THREE           = 51,
    KEY_FOUR            = 52,
    KEY_FIVE            = 53,
    KEY_SIX             = 54,
    KEY_SEVEN           = 55,
    KEY_EIGHT           = 56,
    KEY_NINE            = 57,
    KEY_SEMICOLON       = 59,
    KEY_EQUAL           = 61,
    KEY_A               = 65,
    KEY_B               = 66,
    KEY_C               = 67,
    KEY_D               = 68,
    KEY_E               = 69,
    KEY_F               = 70,
    KEY_G               = 71,
    KEY_H               = 72,
    KEY_I               = 73,
    KEY_J               = 74,
    KEY_K               = 75,
    KEY_L               = 76,
    KEY_M               = 77,
    KEY_N               = 78,
    KEY_O               = 79,
    KEY_P               = 80,
    KEY_Q               = 81,
    KEY_R               = 82,
    KEY_S               = 83,
    KEY_T               = 84,
    KEY_U               = 85,
    KEY_V               = 86,
    KEY_W               = 87,
    KEY_X               = 88,
    KEY_Y               = 89,
    KEY_Z               = 90,

    // Function keys
    KEY_SPACE           = 32,
    KEY_ESCAPE          = 256,
    KEY_ENTER           = 257,
    KEY_TAB             = 258,
    KEY_BACKSPACE       = 259,
    KEY_INSERT          = 260,
    KEY_DELETE          = 261,
    KEY_RIGHT           = 262,
    KEY_LEFT            = 263,
    KEY_DOWN            = 264,
    KEY_UP              = 265,
    KEY_PAGE_UP         = 266,
    KEY_PAGE_DOWN       = 267,
    KEY_HOME            = 268,
    KEY_END             = 269,
    KEY_CAPS_LOCK       = 280,
    KEY_SCROLL_LOCK     = 281,
    KEY_NUM_LOCK        = 282,
    KEY_PRINT_SCREEN    = 283,
    KEY_PAUSE           = 284,
    KEY_F1              = 290,
    KEY_F2              = 291,
    KEY_F3              = 292,
    KEY_F4              = 293,
    KEY_F5              = 294,
    KEY_F6              = 295,
    KEY_F7              = 296,
    KEY_F8              = 297,
    KEY_F9              = 298,
    KEY_F10             = 299,
    KEY_F11             = 300,
    KEY_F12             = 301,
    KEY_LEFT_SHIFT      = 340,
    KEY_LEFT_CONTROL    = 341,
    KEY_LEFT_ALT        = 342,
    KEY_LEFT_SUPER      = 343,
    KEY_RIGHT_SHIFT     = 344,
    KEY_RIGHT_CONTROL   = 345,
    KEY_RIGHT_ALT       = 346,
    KEY_RIGHT_SUPER     = 347,
    KEY_KB_MENU         = 348,
    KEY_LEFT_BRACKET    = 91,
    KEY_BACKSLASH       = 92,
    KEY_RIGHT_BRACKET   = 93,
    KEY_GRAVE           = 96,

    // Keypad keys
    KEY_KP_0            = 320,
    KEY_KP_1            = 321,
    KEY_KP_2            = 322,
    KEY_KP_3            = 323,
    KEY_KP_4            = 324,
    KEY_KP_5            = 325,
    KEY_KP_6            = 326,
    KEY_KP_7            = 327,
    KEY_KP_8            = 328,
    KEY_KP_9            = 329,
    KEY_KP_DECIMAL      = 330,
    KEY_KP_DIVIDE       = 331,
    KEY_KP_MULTIPLY     = 332,
    KEY_KP_SUBTRACT     = 333,
    KEY_KP_ADD          = 334,
    KEY_KP_ENTER        = 335,
    KEY_KP_EQUAL        = 336
} KeyboardKey;

// Android buttons
typedef enum {
    KEY_BACK            = 4,
    KEY_MENU            = 82,
    KEY_VOLUME_UP       = 24,
    KEY_VOLUME_DOWN     = 25
} AndroidButton;

// Mouse buttons
typedef enum {
    MOUSE_LEFT_BUTTON   = 0,
    MOUSE_RIGHT_BUTTON  = 1,
    MOUSE_MIDDLE_BUTTON = 2
} MouseButton;

// Mouse cursor types
typedef enum {
    MOUSE_CURSOR_DEFAULT       = 0,
    MOUSE_CURSOR_ARROW         = 1,
    MOUSE_CURSOR_IBEAM         = 2,
    MOUSE_CURSOR_CROSSHAIR     = 3,
    MOUSE_CURSOR_POINTING_HAND = 4,
    MOUSE_CURSOR_RESIZE_EW     = 5,     // The horizontal resize/move arrow shape
    MOUSE_CURSOR_RESIZE_NS     = 6,     // The vertical resize/move arrow shape
    MOUSE_CURSOR_RESIZE_NWSE   = 7,     // The top-left to bottom-right diagonal resize/move arrow shape
    MOUSE_CURSOR_RESIZE_NESW   = 8,     // The top-right to bottom-left diagonal resize/move arrow shape
    MOUSE_CURSOR_RESIZE_ALL    = 9,     // The omni-directional resize/move cursor shape
    MOUSE_CURSOR_NOT_ALLOWED   = 10     // The operation-not-allowed shape
} MouseCursor;

// Gamepad number
typedef enum {
    GAMEPAD_PLAYER1     = 0,
    GAMEPAD_PLAYER2     = 1,
    GAMEPAD_PLAYER3     = 2,
    GAMEPAD_PLAYER4     = 3
} GamepadNumber;

// Gamepad buttons
typedef enum {
    // This is here just for error checking
    GAMEPAD_BUTTON_UNKNOWN = 0,

    // This is normally a DPAD
    GAMEPAD_BUTTON_LEFT_FACE_UP,
    GAMEPAD_BUTTON_LEFT_FACE_RIGHT,
    GAMEPAD_BUTTON_LEFT_FACE_DOWN,
    GAMEPAD_BUTTON_LEFT_FACE_LEFT,

    // This normally corresponds with PlayStation and Xbox controllers
    // XBOX: [Y,X,A,B]
    // PS3: [Triangle,Square,Cross,Circle]
    // No support for 6 button controllers though..
    GAMEPAD_BUTTON_RIGHT_FACE_UP,
    GAMEPAD_BUTTON_RIGHT_FACE_RIGHT,
    GAMEPAD_BUTTON_RIGHT_FACE_DOWN,
    GAMEPAD_BUTTON_RIGHT_FACE_LEFT,

    // Triggers
    GAMEPAD_BUTTON_LEFT_TRIGGER_1,
    GAMEPAD_BUTTON_LEFT_TRIGGER_2,
    GAMEPAD_BUTTON_RIGHT_TRIGGER_1,
    GAMEPAD_BUTTON_RIGHT_TRIGGER_2,

    // These are buttons in the center of the gamepad
    GAMEPAD_BUTTON_MIDDLE_LEFT,     //PS3 Select
    GAMEPAD_BUTTON_MIDDLE,          //PS Button/XBOX Button
    GAMEPAD_BUTTON_MIDDLE_RIGHT,    //PS3 Start

    // These are the joystick press in buttons
    GAMEPAD_BUTTON_LEFT_THUMB,
    GAMEPAD_BUTTON_RIGHT_THUMB
} GamepadButton;

// Gamepad axis
typedef enum {
    // Left stick
    GAMEPAD_AXIS_LEFT_X = 0,
    GAMEPAD_AXIS_LEFT_Y = 1,

    // Right stick
    GAMEPAD_AXIS_RIGHT_X = 2,
    GAMEPAD_AXIS_RIGHT_Y = 3,

    // Pressure levels for the back triggers
    GAMEPAD_AXIS_LEFT_TRIGGER = 4,      // [1..-1] (pressure-level)
    GAMEPAD_AXIS_RIGHT_TRIGGER = 5      // [1..-1] (pressure-level)
} GamepadAxis;

// Shader location points
typedef enum {
    LOC_VERTEX_POSITION = 0,
    LOC_VERTEX_TEXCOORD01,
    LOC_VERTEX_TEXCOORD02,
    LOC_VERTEX_NORMAL,
    LOC_VERTEX_TANGENT,
    LOC_VERTEX_COLOR,
    LOC_MATRIX_MVP,
    LOC_MATRIX_MODEL,
    LOC_MATRIX_VIEW,
    LOC_MATRIX_PROJECTION,
    LOC_VECTOR_VIEW,
    LOC_COLOR_DIFFUSE,
    LOC_COLOR_SPECULAR,
    LOC_COLOR_AMBIENT,
    LOC_MAP_ALBEDO,          // LOC_MAP_DIFFUSE
    LOC_MAP_METALNESS,       // LOC_MAP_SPECULAR
    LOC_MAP_NORMAL,
    LOC_MAP_ROUGHNESS,
    LOC_MAP_OCCLUSION,
    LOC_MAP_EMISSION,
    LOC_MAP_HEIGHT,
    LOC_MAP_CUBEMAP,
    LOC_MAP_IRRADIANCE,
    LOC_MAP_PREFILTER,
    LOC_MAP_BRDF
} ShaderLocationIndex;

#define LOC_MAP_DIFFUSE      LOC_MAP_ALBEDO
#define LOC_MAP_SPECULAR     LOC_MAP_METALNESS

// Shader uniform data types
typedef enum {
    UNIFORM_FLOAT = 0,
    UNIFORM_VEC2,
    UNIFORM_VEC3,
    UNIFORM_VEC4,
    UNIFORM_INT,
    UNIFORM_IVEC2,
    UNIFORM_IVEC3,
    UNIFORM_IVEC4,
    UNIFORM_SAMPLER2D
} ShaderUniformDataType;

// Material maps
typedef enum {
    MAP_ALBEDO    = 0,       // MAP_DIFFUSE
    MAP_METALNESS = 1,       // MAP_SPECULAR
    MAP_NORMAL    = 2,
    MAP_ROUGHNESS = 3,
    MAP_OCCLUSION,
    MAP_EMISSION,
    MAP_HEIGHT,
    MAP_CUBEMAP,             // NOTE: Uses GL_TEXTURE_CUBE_MAP
    MAP_IRRADIANCE,          // NOTE: Uses GL_TEXTURE_CUBE_MAP
    MAP_PREFILTER,           // NOTE: Uses GL_TEXTURE_CUBE_MAP
    MAP_BRDF
} MaterialMapType;

#define MAP_DIFFUSE      MAP_ALBEDO
#define MAP_SPECULAR     MAP_METALNESS

// Pixel formats
// NOTE: Support depends on OpenGL version and platform
typedef enum {
    UNCOMPRESSED_GRAYSCALE = 1,     // 8 bit per pixel (no alpha)
    UNCOMPRESSED_GRAY_ALPHA,        // 8*2 bpp (2 channels)
    UNCOMPRESSED_R5G6B5,            // 16 bpp
    UNCOMPRESSED_R8G8B8,            // 24 bpp
    UNCOMPRESSED_R5G5B5A1,          // 16 bpp (1 bit alpha)
    UNCOMPRESSED_R4G4B4A4,          // 16 bpp (4 bit alpha)
    UNCOMPRESSED_R8G8B8A8,          // 32 bpp
    UNCOMPRESSED_R32,               // 32 bpp (1 channel - float)
    UNCOMPRESSED_R32G32B32,         // 32*3 bpp (3 channels - float)
    UNCOMPRESSED_R32G32B32A32,      // 32*4 bpp (4 channels - float)
    COMPRESSED_DXT1_RGB,            // 4 bpp (no alpha)
    COMPRESSED_DXT1_RGBA,           // 4 bpp (1 bit alpha)
    COMPRESSED_DXT3_RGBA,           // 8 bpp
    COMPRESSED_DXT5_RGBA,           // 8 bpp
    COMPRESSED_ETC1_RGB,            // 4 bpp
    COMPRESSED_ETC2_RGB,            // 4 bpp
    COMPRESSED_ETC2_EAC_RGBA,       // 8 bpp
    COMPRESSED_PVRT_RGB,            // 4 bpp
    COMPRESSED_PVRT_RGBA,           // 4 bpp
    COMPRESSED_ASTC_4x4_RGBA,       // 8 bpp
    COMPRESSED_ASTC_8x8_RGBA        // 2 bpp
} PixelFormat;

// Texture parameters: filter mode
// NOTE 1: Filtering considers mipmaps if available in the texture
// NOTE 2: Filter is accordingly set for minification and magnification
typedef enum {
    FILTER_POINT = 0,               // No filter, just pixel aproximation
    FILTER_BILINEAR,                // Linear filtering
    FILTER_TRILINEAR,               // Trilinear filtering (linear with mipmaps)
    FILTER_ANISOTROPIC_4X,          // Anisotropic filtering 4x
    FILTER_ANISOTROPIC_8X,          // Anisotropic filtering 8x
    FILTER_ANISOTROPIC_16X,         // Anisotropic filtering 16x
} TextureFilterMode;

// Texture parameters: wrap mode
typedef enum {
    WRAP_REPEAT = 0,        // Repeats texture in tiled mode
    WRAP_CLAMP,             // Clamps texture to edge pixel in tiled mode
    WRAP_MIRROR_REPEAT,     // Mirrors and repeats the texture in tiled mode
    WRAP_MIRROR_CLAMP       // Mirrors and clamps to border the texture in tiled mode
} TextureWrapMode;

// Cubemap layouts
typedef enum {
    CUBEMAP_AUTO_DETECT = 0,        // Automatically detect layout type
    CUBEMAP_LINE_VERTICAL,          // Layout is defined by a vertical line with faces
    CUBEMAP_LINE_HORIZONTAL,        // Layout is defined by an horizontal line with faces
    CUBEMAP_CROSS_THREE_BY_FOUR,    // Layout is defined by a 3x4 cross with cubemap faces
    CUBEMAP_CROSS_FOUR_BY_THREE,    // Layout is defined by a 4x3 cross with cubemap faces
    CUBEMAP_PANORAMA                // Layout is defined by a panorama image (equirectangular map)
} CubemapLayoutType;

// Font type, defines generation method
typedef enum {
    FONT_DEFAULT = 0,       // Default font generation, anti-aliased
    FONT_BITMAP,            // Bitmap font generation, no anti-aliasing
    FONT_SDF                // SDF font generation, requires external shader
} FontType;

// Color blending modes (pre-defined)
typedef enum {
    BLEND_ALPHA = 0,        // Blend textures considering alpha (default)
    BLEND_ADDITIVE,         // Blend textures adding colors
    BLEND_MULTIPLIED,       // Blend textures multiplying colors
    BLEND_ADD_COLORS,       // Blend textures adding colors (alternative)
    BLEND_SUBTRACT_COLORS,  // Blend textures subtracting colors (alternative)
    BLEND_CUSTOM            // Belnd textures using custom src/dst factors (use SetBlendModeCustom())
} BlendMode;

// Gestures type
// NOTE: It could be used as flags to enable only some gestures
typedef enum {
    GESTURE_NONE        = 0,
    GESTURE_TAP         = 1,
    GESTURE_DOUBLETAP   = 2,
    GESTURE_HOLD        = 4,
    GESTURE_DRAG        = 8,
    GESTURE_SWIPE_RIGHT = 16,
    GESTURE_SWIPE_LEFT  = 32,
    GESTURE_SWIPE_UP    = 64,
    GESTURE_SWIPE_DOWN  = 128,
    GESTURE_PINCH_IN    = 256,
    GESTURE_PINCH_OUT   = 512
} GestureType;

// Camera system modes
typedef enum {
    CAMERA_CUSTOM = 0,
    CAMERA_FREE,
    CAMERA_ORBITAL,
    CAMERA_FIRST_PERSON,
    CAMERA_THIRD_PERSON
} CameraMode;

// Camera projection modes
typedef enum {
    CAMERA_PERSPECTIVE = 0,
    CAMERA_ORTHOGRAPHIC
} CameraType;

// N-patch types
typedef enum {
    NPT_9PATCH = 0,         // Npatch defined by 3x3 tiles
    NPT_3PATCH_VERTICAL,    // Npatch defined by 1x3 tiles
    NPT_3PATCH_HORIZONTAL   // Npatch defined by 3x1 tiles
} NPatchType;

// Callbacks to be implemented by users
typedef void (*TraceLogCallback)(int logType, const char *text, va_list args);

#if defined(__cplusplus)
extern "C" {            // Prevents name mangling of functions
#endif

//------------------------------------------------------------------------------------
// Global Variables Definition
//------------------------------------------------------------------------------------
// It's lonely here...

//------------------------------------------------------------------------------------
// Window and Graphics Device Functions (Module: core)
//------------------------------------------------------------------------------------

// Window-related functions
RLAPI void InitWindow(int width, int height, const char *title);  // Initialize window and OpenGL context
RLAPI bool WindowShouldClose(void);                               // Check if KEY_ESCAPE pressed or Close icon pressed
RLAPI void CloseWindow(void);                                     // Close window and unload OpenGL context
RLAPI bool IsWindowReady(void);                                   // Check if window has been initialized successfully
RLAPI bool IsWindowFullscreen(void);                              // Check if window is currently fullscreen
RLAPI bool IsWindowHidden(void);                                  // Check if window is currently hidden (only PLATFORM_DESKTOP)
RLAPI bool IsWindowMinimized(void);                               // Check if window is currently minimized (only PLATFORM_DESKTOP)
RLAPI bool IsWindowMaximized(void);                               // Check if window is currently maximized (only PLATFORM_DESKTOP)
RLAPI bool IsWindowFocused(void);                                 // Check if window is currently focused (only PLATFORM_DESKTOP)
RLAPI bool IsWindowResized(void);                                 // Check if window has been resized last frame
RLAPI bool IsWindowState(unsigned int flag);                      // Check if one specific window flag is enabled
RLAPI void SetWindowState(unsigned int flags);                    // Set window configuration state using flags
RLAPI void ClearWindowState(unsigned int flags);                  // Clear window configuration state flags
RLAPI void ToggleFullscreen(void);                                // Toggle window state: fullscreen/windowed (only PLATFORM_DESKTOP)
RLAPI void MaximizeWindow(void);                                  // Set window state: maximized, if resizable (only PLATFORM_DESKTOP)
RLAPI void MinimizeWindow(void);                                  // Set window state: minimized, if resizable (only PLATFORM_DESKTOP)
RLAPI void RestoreWindow(void);                                   // Set window state: not minimized/maximized (only PLATFORM_DESKTOP)
RLAPI void SetWindowIcon(Image image);                            // Set icon for window (only PLATFORM_DESKTOP)
RLAPI void SetWindowTitle(const char *title);                     // Set title for window (only PLATFORM_DESKTOP)
RLAPI void SetWindowPosition(int x, int y);                       // Set window position on screen (only PLATFORM_DESKTOP)
RLAPI void SetWindowMonitor(int monitor);                         // Set monitor for the current window (fullscreen mode)
RLAPI void SetWindowMinSize(int width, int height);               // Set window minimum dimensions (for FLAG_WINDOW_RESIZABLE)
RLAPI void SetWindowSize(int width, int height);                  // Set window dimensions
RLAPI void *GetWindowHandle(void);                                // Get native window handle
RLAPI int GetScreenWidth(void);                                   // Get current screen width
RLAPI int GetScreenHeight(void);                                  // Get current screen height
RLAPI int GetMonitorCount(void);                                  // Get number of connected monitors
RLAPI Vector2 GetMonitorPosition(int monitor);                    // Get specified monitor position
RLAPI int GetMonitorWidth(int monitor);                           // Get specified monitor width
RLAPI int GetMonitorHeight(int monitor);                          // Get specified monitor height
RLAPI int GetMonitorPhysicalWidth(int monitor);                   // Get specified monitor physical width in millimetres
RLAPI int GetMonitorPhysicalHeight(int monitor);                  // Get specified monitor physical height in millimetres
RLAPI int GetMonitorRefreshRate(int monitor);                     // Get specified monitor refresh rate
RLAPI Vector2 GetWindowPosition(void);                            // Get window position XY on monitor
RLAPI Vector2 GetWindowScaleDPI(void);                            // Get window scale DPI factor
RLAPI const char *GetMonitorName(int monitor);                    // Get the human-readable, UTF-8 encoded name of the primary monitor
RLAPI void SetClipboardText(const char *text);                    // Set clipboard text content
RLAPI const char *GetClipboardText(void);                         // Get clipboard text content

// Cursor-related functions
RLAPI void ShowCursor(void);                                      // Shows cursor
RLAPI void HideCursor(void);                                      // Hides cursor
RLAPI bool IsCursorHidden(void);                                  // Check if cursor is not visible
RLAPI void EnableCursor(void);                                    // Enables cursor (unlock cursor)
RLAPI void DisableCursor(void);                                   // Disables cursor (lock cursor)
RLAPI bool IsCursorOnScreen(void);                                // Check if cursor is on the current screen.

// Drawing-related functions
RLAPI void ClearBackground(Color color);                          // Set background color (framebuffer clear color)
RLAPI void BeginDrawing(void);                                    // Setup canvas (framebuffer) to start drawing
RLAPI void EndDrawing(void);                                      // End canvas drawing and swap buffers (double buffering)
RLAPI void BeginMode2D(Camera2D camera);                          // Initialize 2D mode with custom camera (2D)
RLAPI void EndMode2D(void);                                       // Ends 2D mode with custom camera
RLAPI void BeginMode3D(Camera3D camera);                          // Initializes 3D mode with custom camera (3D)
RLAPI void EndMode3D(void);                                       // Ends 3D mode and returns to default 2D orthographic mode
RLAPI void BeginTextureMode(RenderTexture2D target);              // Initializes render texture for drawing
RLAPI void EndTextureMode(void);                                  // Ends drawing to render texture
RLAPI void BeginScissorMode(int x, int y, int width, int height); // Begin scissor mode (define screen area for following drawing)
RLAPI void EndScissorMode(void);                                  // End scissor mode

// Screen-space-related functions
RLAPI Ray GetMouseRay(Vector2 mousePosition, Camera camera);      // Returns a ray trace from mouse position
RLAPI Matrix GetCameraMatrix(Camera camera);                      // Returns camera transform matrix (view matrix)
RLAPI Matrix GetCameraMatrix2D(Camera2D camera);                  // Returns camera 2d transform matrix
RLAPI Vector2 GetWorldToScreen(Vector3 position, Camera camera);  // Returns the screen space position for a 3d world space position
RLAPI Vector2 GetWorldToScreenEx(Vector3 position, Camera camera, int width, int height); // Returns size position for a 3d world space position
RLAPI Vector2 GetWorldToScreen2D(Vector2 position, Camera2D camera); // Returns the screen space position for a 2d camera world space position
RLAPI Vector2 GetScreenToWorld2D(Vector2 position, Camera2D camera); // Returns the world space position for a 2d camera screen space position

// Timing-related functions
RLAPI void SetTargetFPS(int fps);                                 // Set target FPS (maximum)
RLAPI int GetFPS(void);                                           // Returns current FPS
RLAPI float GetFrameTime(void);                                   // Returns time in seconds for last frame drawn
RLAPI double GetTime(void);                                       // Returns elapsed time in seconds since InitWindow()

// Misc. functions
RLAPI void SetConfigFlags(unsigned int flags);                    // Setup init configuration flags (view FLAGS)

RLAPI void SetTraceLogLevel(int logType);                         // Set the current threshold (minimum) log level
RLAPI void SetTraceLogExit(int logType);                          // Set the exit threshold (minimum) log level
RLAPI void SetTraceLogCallback(TraceLogCallback callback);        // Set a trace log callback to enable custom logging
RLAPI void TraceLog(int logType, const char *text, ...);          // Show trace log messages (LOG_DEBUG, LOG_INFO, LOG_WARNING, LOG_ERROR)

RLAPI void *MemAlloc(int size);                                   // Internal memory allocator
RLAPI void MemFree(void *ptr);                                    // Internal memory free
RLAPI void TakeScreenshot(const char *fileName);                  // Takes a screenshot of current screen (saved a .png)
RLAPI int GetRandomValue(int min, int max);                       // Returns a random value between min and max (both included)

// Files management functions
RLAPI unsigned char *LoadFileData(const char *fileName, unsigned int *bytesRead);     // Load file data as byte array (read)
RLAPI void UnloadFileData(unsigned char *data);                   // Unload file data allocated by LoadFileData()
RLAPI bool SaveFileData(const char *fileName, void *data, unsigned int bytesToWrite); // Save data to file from byte array (write), returns true on success
RLAPI char *LoadFileText(const char *fileName);                   // Load text data from file (read), returns a '\0' terminated string
RLAPI void UnloadFileText(unsigned char *text);                   // Unload file text data allocated by LoadFileText()
RLAPI bool SaveFileText(const char *fileName, char *text);        // Save text data to file (write), string must be '\0' terminated, returns true on success
RLAPI bool FileExists(const char *fileName);                      // Check if file exists
RLAPI bool DirectoryExists(const char *dirPath);                  // Check if a directory path exists
RLAPI bool IsFileExtension(const char *fileName, const char *ext);// Check file extension (including point: .png, .wav)
RLAPI const char *GetFileExtension(const char *fileName);         // Get pointer to extension for a filename string (including point: ".png")
RLAPI const char *GetFileName(const char *filePath);              // Get pointer to filename for a path string
RLAPI const char *GetFileNameWithoutExt(const char *filePath);    // Get filename string without extension (uses static string)
RLAPI const char *GetDirectoryPath(const char *filePath);         // Get full path for a given fileName with path (uses static string)
RLAPI const char *GetPrevDirectoryPath(const char *dirPath);      // Get previous directory path for a given path (uses static string)
RLAPI const char *GetWorkingDirectory(void);                      // Get current working directory (uses static string)
RLAPI char **GetDirectoryFiles(const char *dirPath, int *count);  // Get filenames in a directory path (memory should be freed)
RLAPI void ClearDirectoryFiles(void);                             // Clear directory files paths buffers (free memory)
RLAPI bool ChangeDirectory(const char *dir);                      // Change working directory, return true on success
RLAPI bool IsFileDropped(void);                                   // Check if a file has been dropped into window
RLAPI char **GetDroppedFiles(int *count);                         // Get dropped files names (memory should be freed)
RLAPI void ClearDroppedFiles(void);                               // Clear dropped files paths buffer (free memory)
RLAPI long GetFileModTime(const char *fileName);                  // Get file modification time (last write time)

RLAPI unsigned char *CompressData(unsigned char *data, int dataLength, int *compDataLength);        // Compress data (DEFLATE algorithm)
RLAPI unsigned char *DecompressData(unsigned char *compData, int compDataLength, int *dataLength);  // Decompress data (DEFLATE algorithm)

// Persistent storage management
RLAPI bool SaveStorageValue(unsigned int position, int value);    // Save integer value to storage file (to defined position), returns true on success
RLAPI int LoadStorageValue(unsigned int position);                // Load integer value from storage file (from defined position)

RLAPI void OpenURL(const char *url);                              // Open URL with default system browser (if available)

//------------------------------------------------------------------------------------
// Input Handling Functions (Module: core)
//------------------------------------------------------------------------------------

// Input-related functions: keyboard
RLAPI bool IsKeyPressed(int key);                             // Detect if a key has been pressed once
RLAPI bool IsKeyDown(int key);                                // Detect if a key is being pressed
RLAPI bool IsKeyReleased(int key);                            // Detect if a key has been released once
RLAPI bool IsKeyUp(int key);                                  // Detect if a key is NOT being pressed
RLAPI void SetExitKey(int key);                               // Set a custom key to exit program (default is ESC)
RLAPI int GetKeyPressed(void);                                // Get key pressed (keycode), call it multiple times for keys queued
RLAPI int GetCharPressed(void);                               // Get char pressed (unicode), call it multiple times for chars queued

// Input-related functions: gamepads
RLAPI bool IsGamepadAvailable(int gamepad);                   // Detect if a gamepad is available
RLAPI bool IsGamepadName(int gamepad, const char *name);      // Check gamepad name (if available)
RLAPI const char *GetGamepadName(int gamepad);                // Return gamepad internal name id
RLAPI bool IsGamepadButtonPressed(int gamepad, int button);   // Detect if a gamepad button has been pressed once
RLAPI bool IsGamepadButtonDown(int gamepad, int button);      // Detect if a gamepad button is being pressed
RLAPI bool IsGamepadButtonReleased(int gamepad, int button);  // Detect if a gamepad button has been released once
RLAPI bool IsGamepadButtonUp(int gamepad, int button);        // Detect if a gamepad button is NOT being pressed
RLAPI int GetGamepadButtonPressed(void);                      // Get the last gamepad button pressed
RLAPI int GetGamepadAxisCount(int gamepad);                   // Return gamepad axis count for a gamepad
RLAPI float GetGamepadAxisMovement(int gamepad, int axis);    // Return axis movement value for a gamepad axis

// Input-related functions: mouse
RLAPI bool IsMouseButtonPressed(int button);                  // Detect if a mouse button has been pressed once
RLAPI bool IsMouseButtonDown(int button);                     // Detect if a mouse button is being pressed
RLAPI bool IsMouseButtonReleased(int button);                 // Detect if a mouse button has been released once
RLAPI bool IsMouseButtonUp(int button);                       // Detect if a mouse button is NOT being pressed
RLAPI int GetMouseX(void);                                    // Returns mouse position X
RLAPI int GetMouseY(void);                                    // Returns mouse position Y
RLAPI Vector2 GetMousePosition(void);                         // Returns mouse position XY
RLAPI void SetMousePosition(int x, int y);                    // Set mouse position XY
RLAPI void SetMouseOffset(int offsetX, int offsetY);          // Set mouse offset
RLAPI void SetMouseScale(float scaleX, float scaleY);         // Set mouse scaling
RLAPI float GetMouseWheelMove(void);                          // Returns mouse wheel movement Y
RLAPI int GetMouseCursor(void);                               // Returns mouse cursor if (MouseCursor enum)
RLAPI void SetMouseCursor(int cursor);                        // Set mouse cursor

// Input-related functions: touch
RLAPI int GetTouchX(void);                                    // Returns touch position X for touch point 0 (relative to screen size)
RLAPI int GetTouchY(void);                                    // Returns touch position Y for touch point 0 (relative to screen size)
RLAPI Vector2 GetTouchPosition(int index);                    // Returns touch position XY for a touch point index (relative to screen size)

//------------------------------------------------------------------------------------
// Gestures and Touch Handling Functions (Module: gestures)
//------------------------------------------------------------------------------------
RLAPI void SetGesturesEnabled(unsigned int gestureFlags);     // Enable a set of gestures using flags
RLAPI bool IsGestureDetected(int gesture);                    // Check if a gesture have been detected
RLAPI int GetGestureDetected(void);                           // Get latest detected gesture
RLAPI int GetTouchPointsCount(void);                          // Get touch points count
RLAPI float GetGestureHoldDuration(void);                     // Get gesture hold time in milliseconds
RLAPI Vector2 GetGestureDragVector(void);                     // Get gesture drag vector
RLAPI float GetGestureDragAngle(void);                        // Get gesture drag angle
RLAPI Vector2 GetGesturePinchVector(void);                    // Get gesture pinch delta
RLAPI float GetGesturePinchAngle(void);                       // Get gesture pinch angle

//------------------------------------------------------------------------------------
// Camera System Functions (Module: camera)
//------------------------------------------------------------------------------------
RLAPI void SetCameraMode(Camera camera, int mode);                // Set camera mode (multiple camera modes available)
RLAPI void UpdateCamera(Camera *camera);                          // Update camera position for selected mode

RLAPI void SetCameraPanControl(int keyPan);                       // Set camera pan key to combine with mouse movement (free camera)
RLAPI void SetCameraAltControl(int keyAlt);                       // Set camera alt key to combine with mouse movement (free camera)
RLAPI void SetCameraSmoothZoomControl(int keySmoothZoom);         // Set camera smooth zoom key to combine with mouse (free camera)
RLAPI void SetCameraMoveControls(int keyFront, int keyBack, int keyRight, int keyLeft, int keyUp, int keyDown); // Set camera move controls (1st person and 3rd person cameras)

//------------------------------------------------------------------------------------
// Basic Shapes Drawing Functions (Module: shapes)
//------------------------------------------------------------------------------------

// Basic shapes drawing functions
RLAPI void DrawPixel(int posX, int posY, Color color);                                                   // Draw a pixel
RLAPI void DrawPixelV(Vector2 position, Color color);                                                    // Draw a pixel (Vector version)
RLAPI void DrawLine(int startPosX, int startPosY, int endPosX, int endPosY, Color color);                // Draw a line
RLAPI void DrawLineV(Vector2 startPos, Vector2 endPos, Color color);                                     // Draw a line (Vector version)
RLAPI void DrawLineEx(Vector2 startPos, Vector2 endPos, float thick, Color color);                       // Draw a line defining thickness
RLAPI void DrawLineBezier(Vector2 startPos, Vector2 endPos, float thick, Color color);                   // Draw a line using cubic-bezier curves in-out
RLAPI void DrawLineStrip(Vector2 *points, int pointsCount, Color color);                                 // Draw lines sequence
RLAPI void DrawCircle(int centerX, int centerY, float radius, Color color);                              // Draw a color-filled circle
RLAPI void DrawCircleSector(Vector2 center, float radius, int startAngle, int endAngle, int segments, Color color);      // Draw a piece of a circle
RLAPI void DrawCircleSectorLines(Vector2 center, float radius, int startAngle, int endAngle, int segments, Color color); // Draw circle sector outline
RLAPI void DrawCircleGradient(int centerX, int centerY, float radius, Color color1, Color color2);       // Draw a gradient-filled circle
RLAPI void DrawCircleV(Vector2 center, float radius, Color color);                                       // Draw a color-filled circle (Vector version)
RLAPI void DrawCircleLines(int centerX, int centerY, float radius, Color color);                         // Draw circle outline
RLAPI void DrawEllipse(int centerX, int centerY, float radiusH, float radiusV, Color color);             // Draw ellipse
RLAPI void DrawEllipseLines(int centerX, int centerY, float radiusH, float radiusV, Color color);        // Draw ellipse outline
RLAPI void DrawRing(Vector2 center, float innerRadius, float outerRadius, int startAngle, int endAngle, int segments, Color color); // Draw ring
RLAPI void DrawRingLines(Vector2 center, float innerRadius, float outerRadius, int startAngle, int endAngle, int segments, Color color);    // Draw ring outline
RLAPI void DrawRectangle(int posX, int posY, int width, int height, Color color);                        // Draw a color-filled rectangle
RLAPI void DrawRectangleV(Vector2 position, Vector2 size, Color color);                                  // Draw a color-filled rectangle (Vector version)
RLAPI void DrawRectangleRec(Rectangle rec, Color color);                                                 // Draw a color-filled rectangle
RLAPI void DrawRectanglePro(Rectangle rec, Vector2 origin, float rotation, Color color);                 // Draw a color-filled rectangle with pro parameters
RLAPI void DrawRectangleGradientV(int posX, int posY, int width, int height, Color color1, Color color2);// Draw a vertical-gradient-filled rectangle
RLAPI void DrawRectangleGradientH(int posX, int posY, int width, int height, Color color1, Color color2);// Draw a horizontal-gradient-filled rectangle
RLAPI void DrawRectangleGradientEx(Rectangle rec, Color col1, Color col2, Color col3, Color col4);       // Draw a gradient-filled rectangle with custom vertex colors
RLAPI void DrawRectangleLines(int posX, int posY, int width, int height, Color color);                   // Draw rectangle outline
RLAPI void DrawRectangleLinesEx(Rectangle rec, int lineThick, Color color);                              // Draw rectangle outline with extended parameters
RLAPI void DrawRectangleRounded(Rectangle rec, float roundness, int segments, Color color);              // Draw rectangle with rounded edges
RLAPI void DrawRectangleRoundedLines(Rectangle rec, float roundness, int segments, int lineThick, Color color); // Draw rectangle with rounded edges outline
RLAPI void DrawTriangle(Vector2 v1, Vector2 v2, Vector2 v3, Color color);                                // Draw a color-filled triangle (vertex in counter-clockwise order!)
RLAPI void DrawTriangleLines(Vector2 v1, Vector2 v2, Vector2 v3, Color color);                           // Draw triangle outline (vertex in counter-clockwise order!)
RLAPI void DrawTriangleFan(Vector2 *points, int pointsCount, Color color);                               // Draw a triangle fan defined by points (first vertex is the center)
RLAPI void DrawTriangleStrip(Vector2 *points, int pointsCount, Color color);                             // Draw a triangle strip defined by points
RLAPI void DrawPoly(Vector2 center, int sides, float radius, float rotation, Color color);               // Draw a regular polygon (Vector version)
RLAPI void DrawPolyLines(Vector2 center, int sides, float radius, float rotation, Color color);          // Draw a polygon outline of n sides

// Basic shapes collision detection functions
RLAPI bool CheckCollisionRecs(Rectangle rec1, Rectangle rec2);                                           // Check collision between two rectangles
RLAPI bool CheckCollisionCircles(Vector2 center1, float radius1, Vector2 center2, float radius2);        // Check collision between two circles
RLAPI bool CheckCollisionCircleRec(Vector2 center, float radius, Rectangle rec);                         // Check collision between circle and rectangle
RLAPI bool CheckCollisionPointRec(Vector2 point, Rectangle rec);                                         // Check if point is inside rectangle
RLAPI bool CheckCollisionPointCircle(Vector2 point, Vector2 center, float radius);                       // Check if point is inside circle
RLAPI bool CheckCollisionPointTriangle(Vector2 point, Vector2 p1, Vector2 p2, Vector2 p3);               // Check if point is inside a triangle
RLAPI bool CheckCollisionLines(Vector2 startPos1, Vector2 endPos1, Vector2 startPos2, Vector2 endPos2, Vector2 *collisionPoint); // Check the collision between two lines defined by two points each, returns collision point by reference
RLAPI Rectangle GetCollisionRec(Rectangle rec1, Rectangle rec2);                                         // Get collision rectangle for two rectangles collision

//------------------------------------------------------------------------------------
// Texture Loading and Drawing Functions (Module: textures)
//------------------------------------------------------------------------------------

// Image loading functions
// NOTE: This functions do not require GPU access
RLAPI Image LoadImage(const char *fileName);                                                             // Load image from file into CPU memory (RAM)
RLAPI Image LoadImageRaw(const char *fileName, int width, int height, int format, int headerSize);       // Load image from RAW file data
RLAPI Image LoadImageAnim(const char *fileName, int *frames);                                            // Load image sequence from file (frames appended to image.data)
RLAPI Image LoadImageFromMemory(const char *fileType, const unsigned char *fileData, int dataSize);      // Load image from memory buffer, fileType refers to extension: i.e. "png"
RLAPI void UnloadImage(Image image);                                                                     // Unload image from CPU memory (RAM)
RLAPI bool ExportImage(Image image, const char *fileName);                                               // Export image data to file, returns true on success
RLAPI bool ExportImageAsCode(Image image, const char *fileName);                                         // Export image as code file defining an array of bytes, returns true on success

// Image generation functions
RLAPI Image GenImageColor(int width, int height, Color color);                                           // Generate image: plain color
RLAPI Image GenImageGradientV(int width, int height, Color top, Color bottom);                           // Generate image: vertical gradient
RLAPI Image GenImageGradientH(int width, int height, Color left, Color right);                           // Generate image: horizontal gradient
RLAPI Image GenImageGradientRadial(int width, int height, float density, Color inner, Color outer);      // Generate image: radial gradient
RLAPI Image GenImageChecked(int width, int height, int checksX, int checksY, Color col1, Color col2);    // Generate image: checked
RLAPI Image GenImageWhiteNoise(int width, int height, float factor);                                     // Generate image: white noise
RLAPI Image GenImagePerlinNoise(int width, int height, int offsetX, int offsetY, float scale);           // Generate image: perlin noise
RLAPI Image GenImageCellular(int width, int height, int tileSize);                                       // Generate image: cellular algorithm. Bigger tileSize means bigger cells

// Image manipulation functions
RLAPI Image ImageCopy(Image image);                                                                      // Create an image duplicate (useful for transformations)
RLAPI Image ImageFromImage(Image image, Rectangle rec);                                                  // Create an image from another image piece
RLAPI Image ImageText(const char *text, int fontSize, Color color);                                      // Create an image from text (default font)
RLAPI Image ImageTextEx(Font font, const char *text, float fontSize, float spacing, Color tint);         // Create an image from text (custom sprite font)
RLAPI void ImageFormat(Image *image, int newFormat);                                                     // Convert image data to desired format
RLAPI void ImageToPOT(Image *image, Color fill);                                                         // Convert image to POT (power-of-two)
RLAPI void ImageCrop(Image *image, Rectangle crop);                                                      // Crop an image to a defined rectangle
RLAPI void ImageAlphaCrop(Image *image, float threshold);                                                // Crop image depending on alpha value
RLAPI void ImageAlphaClear(Image *image, Color color, float threshold);                                  // Clear alpha channel to desired color
RLAPI void ImageAlphaMask(Image *image, Image alphaMask);                                                // Apply alpha mask to image
RLAPI void ImageAlphaPremultiply(Image *image);                                                          // Premultiply alpha channel
RLAPI void ImageResize(Image *image, int newWidth, int newHeight);                                       // Resize image (Bicubic scaling algorithm)
RLAPI void ImageResizeNN(Image *image, int newWidth,int newHeight);                                      // Resize image (Nearest-Neighbor scaling algorithm)
RLAPI void ImageResizeCanvas(Image *image, int newWidth, int newHeight, int offsetX, int offsetY, Color fill);  // Resize canvas and fill with color
RLAPI void ImageMipmaps(Image *image);                                                                   // Generate all mipmap levels for a provided image
RLAPI void ImageDither(Image *image, int rBpp, int gBpp, int bBpp, int aBpp);                            // Dither image data to 16bpp or lower (Floyd-Steinberg dithering)
RLAPI void ImageFlipVertical(Image *image);                                                              // Flip image vertically
RLAPI void ImageFlipHorizontal(Image *image);                                                            // Flip image horizontally
RLAPI void ImageRotateCW(Image *image);                                                                  // Rotate image clockwise 90deg
RLAPI void ImageRotateCCW(Image *image);                                                                 // Rotate image counter-clockwise 90deg
RLAPI void ImageColorTint(Image *image, Color color);                                                    // Modify image color: tint
RLAPI void ImageColorInvert(Image *image);                                                               // Modify image color: invert
RLAPI void ImageColorGrayscale(Image *image);                                                            // Modify image color: grayscale
RLAPI void ImageColorContrast(Image *image, float contrast);                                             // Modify image color: contrast (-100 to 100)
RLAPI void ImageColorBrightness(Image *image, int brightness);                                           // Modify image color: brightness (-255 to 255)
RLAPI void ImageColorReplace(Image *image, Color color, Color replace);                                  // Modify image color: replace color
RLAPI Color *LoadImageColors(Image image);                                                               // Load color data from image as a Color array (RGBA - 32bit)
RLAPI Color *LoadImagePalette(Image image, int maxPaletteSize, int *colorsCount);                        // Load colors palette from image as a Color array (RGBA - 32bit)
RLAPI void UnloadImageColors(Color *colors);                                                             // Unload color data loaded with LoadImageColors()
RLAPI void UnloadImagePalette(Color *colors);                                                            // Unload colors palette loaded with LoadImagePalette()
RLAPI Rectangle GetImageAlphaBorder(Image image, float threshold);                                       // Get image alpha border rectangle

// Image drawing functions
// NOTE: Image software-rendering functions (CPU)
RLAPI void ImageClearBackground(Image *dst, Color color);                                                // Clear image background with given color
RLAPI void ImageDrawPixel(Image *dst, int posX, int posY, Color color);                                  // Draw pixel within an image
RLAPI void ImageDrawPixelV(Image *dst, Vector2 position, Color color);                                   // Draw pixel within an image (Vector version)
RLAPI void ImageDrawLine(Image *dst, int startPosX, int startPosY, int endPosX, int endPosY, Color color); // Draw line within an image
RLAPI void ImageDrawLineV(Image *dst, Vector2 start, Vector2 end, Color color);                          // Draw line within an image (Vector version)
RLAPI void ImageDrawCircle(Image *dst, int centerX, int centerY, int radius, Color color);               // Draw circle within an image
RLAPI void ImageDrawCircleV(Image *dst, Vector2 center, int radius, Color color);                        // Draw circle within an image (Vector version)
RLAPI void ImageDrawRectangle(Image *dst, int posX, int posY, int width, int height, Color color);       // Draw rectangle within an image
RLAPI void ImageDrawRectangleV(Image *dst, Vector2 position, Vector2 size, Color color);                 // Draw rectangle within an image (Vector version)
RLAPI void ImageDrawRectangleRec(Image *dst, Rectangle rec, Color color);                                // Draw rectangle within an image
RLAPI void ImageDrawRectangleLines(Image *dst, Rectangle rec, int thick, Color color);                   // Draw rectangle lines within an image
RLAPI void ImageDraw(Image *dst, Image src, Rectangle srcRec, Rectangle dstRec, Color tint);             // Draw a source image within a destination image (tint applied to source)
RLAPI void ImageDrawText(Image *dst, const char *text, int posX, int posY, int fontSize, Color color);   // Draw text (using default font) within an image (destination)
RLAPI void ImageDrawTextEx(Image *dst, Font font, const char *text, Vector2 position, float fontSize, float spacing, Color tint); // Draw text (custom sprite font) within an image (destination)

// Texture loading functions
// NOTE: These functions require GPU access
RLAPI Texture2D LoadTexture(const char *fileName);                                                       // Load texture from file into GPU memory (VRAM)
RLAPI Texture2D LoadTextureFromImage(Image image);                                                       // Load texture from image data
RLAPI TextureCubemap LoadTextureCubemap(Image image, int layoutType);                                    // Load cubemap from image, multiple image cubemap layouts supported
RLAPI RenderTexture2D LoadRenderTexture(int width, int height);                                          // Load texture for rendering (framebuffer)
RLAPI void UnloadTexture(Texture2D texture);                                                             // Unload texture from GPU memory (VRAM)
RLAPI void UnloadRenderTexture(RenderTexture2D target);                                                  // Unload render texture from GPU memory (VRAM)
RLAPI void UpdateTexture(Texture2D texture, const void *pixels);                                         // Update GPU texture with new data
RLAPI void UpdateTextureRec(Texture2D texture, Rectangle rec, const void *pixels);                       // Update GPU texture rectangle with new data
RLAPI Image GetTextureData(Texture2D texture);                                                           // Get pixel data from GPU texture and return an Image
RLAPI Image GetScreenData(void);                                                                         // Get pixel data from screen buffer and return an Image (screenshot)

// Texture configuration functions
RLAPI void GenTextureMipmaps(Texture2D *texture);                                                        // Generate GPU mipmaps for a texture
RLAPI void SetTextureFilter(Texture2D texture, int filterMode);                                          // Set texture scaling filter mode
RLAPI void SetTextureWrap(Texture2D texture, int wrapMode);                                              // Set texture wrapping mode

// Texture drawing functions
RLAPI void DrawTexture(Texture2D texture, int posX, int posY, Color tint);                               // Draw a Texture2D
RLAPI void DrawTextureV(Texture2D texture, Vector2 position, Color tint);                                // Draw a Texture2D with position defined as Vector2
RLAPI void DrawTextureEx(Texture2D texture, Vector2 position, float rotation, float scale, Color tint);  // Draw a Texture2D with extended parameters
RLAPI void DrawTextureRec(Texture2D texture, Rectangle source, Vector2 position, Color tint);         // Draw a part of a texture defined by a rectangle
RLAPI void DrawTextureQuad(Texture2D texture, Vector2 tiling, Vector2 offset, Rectangle quad, Color tint);  // Draw texture quad with tiling and offset parameters
RLAPI void DrawTextureTiled(Texture2D texture, Rectangle source, Rectangle dest, Vector2 origin, float rotation, float scale, Color tint);  // Draw part of a texture (defined by a rectangle) with rotation and scale tiled into dest.
RLAPI void DrawTexturePro(Texture2D texture, Rectangle source, Rectangle dest, Vector2 origin, float rotation, Color tint);       // Draw a part of a texture defined by a rectangle with 'pro' parameters
RLAPI void DrawTextureNPatch(Texture2D texture, NPatchInfo nPatchInfo, Rectangle dest, Vector2 origin, float rotation, Color tint);  // Draws a texture (or part of it) that stretches or shrinks nicely

// Color/pixel related functions
RLAPI Color Fade(Color color, float alpha);                                 // Returns color with alpha applied, alpha goes from 0.0f to 1.0f
RLAPI int ColorToInt(Color color);                                          // Returns hexadecimal value for a Color
RLAPI Vector4 ColorNormalize(Color color);                                  // Returns Color normalized as float [0..1]
RLAPI Color ColorFromNormalized(Vector4 normalized);                        // Returns Color from normalized values [0..1]
RLAPI Vector3 ColorToHSV(Color color);                                      // Returns HSV values for a Color
RLAPI Color ColorFromHSV(float hue, float saturation, float value);         // Returns a Color from HSV values
RLAPI Color ColorAlpha(Color color, float alpha);                           // Returns color with alpha applied, alpha goes from 0.0f to 1.0f
RLAPI Color ColorAlphaBlend(Color dst, Color src, Color tint);              // Returns src alpha-blended into dst color with tint
RLAPI Color GetColor(int hexValue);                                         // Get Color structure from hexadecimal value
RLAPI Color GetPixelColor(void *srcPtr, int format);                        // Get Color from a source pixel pointer of certain format
RLAPI void SetPixelColor(void *dstPtr, Color color, int format);            // Set color formatted into destination pixel pointer
RLAPI int GetPixelDataSize(int width, int height, int format);              // Get pixel data size in bytes for certain format

//------------------------------------------------------------------------------------
// Font Loading and Text Drawing Functions (Module: text)
//------------------------------------------------------------------------------------

// Font loading/unloading functions
RLAPI Font GetFontDefault(void);                                                            // Get the default Font
RLAPI Font LoadFont(const char *fileName);                                                  // Load font from file into GPU memory (VRAM)
RLAPI Font LoadFontEx(const char *fileName, int fontSize, int *fontChars, int charsCount);  // Load font from file with extended parameters
RLAPI Font LoadFontFromImage(Image image, Color key, int firstChar);                        // Load font from Image (XNA style)
RLAPI Font LoadFontFromMemory(const char *fileType, const unsigned char *fileData, int dataSize, int fontSize, int *fontChars, int charsCount); // Load font from memory buffer, fileType refers to extension: i.e. "ttf"
RLAPI CharInfo *LoadFontData(const unsigned char *fileData, int dataSize, int fontSize, int *fontChars, int charsCount, int type);      // Load font data for further use
RLAPI Image GenImageFontAtlas(const CharInfo *chars, Rectangle **recs, int charsCount, int fontSize, int padding, int packMethod);      // Generate image font atlas using chars info
RLAPI void UnloadFontData(CharInfo *chars, int charsCount);                                 // Unload font chars info data (RAM)
RLAPI void UnloadFont(Font font);                                                           // Unload Font from GPU memory (VRAM)

// Text drawing functions
RLAPI void DrawFPS(int posX, int posY);                                                     // Shows current FPS
RLAPI void DrawText(const char *text, int posX, int posY, int fontSize, Color color);       // Draw text (using default font)
RLAPI void DrawTextEx(Font font, const char *text, Vector2 position, float fontSize, float spacing, Color tint);                // Draw text using font and additional parameters
RLAPI void DrawTextRec(Font font, const char *text, Rectangle rec, float fontSize, float spacing, bool wordWrap, Color tint);   // Draw text using font inside rectangle limits
RLAPI void DrawTextRecEx(Font font, const char *text, Rectangle rec, float fontSize, float spacing, bool wordWrap, Color tint,
                         int selectStart, int selectLength, Color selectTint, Color selectBackTint);    // Draw text using font inside rectangle limits with support for text selection
RLAPI void DrawTextCodepoint(Font font, int codepoint, Vector2 position, float fontSize, Color tint);   // Draw one character (codepoint)

// Text misc. functions
RLAPI int MeasureText(const char *text, int fontSize);                                      // Measure string width for default font
RLAPI Vector2 MeasureTextEx(Font font, const char *text, float fontSize, float spacing);    // Measure string size for Font
RLAPI int GetGlyphIndex(Font font, int codepoint);                                          // Get index position for a unicode character on font

// Text strings management functions (no utf8 strings, only byte chars)
// NOTE: Some strings allocate memory internally for returned strings, just be careful!
RLAPI int TextCopy(char *dst, const char *src);                                             // Copy one string to another, returns bytes copied
RLAPI bool TextIsEqual(const char *text1, const char *text2);                               // Check if two text string are equal
RLAPI unsigned int TextLength(const char *text);                                            // Get text length, checks for '\0' ending
RLAPI const char *TextFormat(const char *text, ...);                                        // Text formatting with variables (sprintf style)
RLAPI const char *TextSubtext(const char *text, int position, int length);                  // Get a piece of a text string
RLAPI char *TextReplace(char *text, const char *replace, const char *by);                   // Replace text string (memory must be freed!)
RLAPI char *TextInsert(const char *text, const char *insert, int position);                 // Insert text in a position (memory must be freed!)
RLAPI const char *TextJoin(const char **textList, int count, const char *delimiter);        // Join text strings with delimiter
RLAPI const char **TextSplit(const char *text, char delimiter, int *count);                 // Split text into multiple strings
RLAPI void TextAppend(char *text, const char *append, int *position);                       // Append text at specific position and move cursor!
RLAPI int TextFindIndex(const char *text, const char *find);                                // Find first text occurrence within a string
RLAPI const char *TextToUpper(const char *text);                      // Get upper case version of provided string
RLAPI const char *TextToLower(const char *text);                      // Get lower case version of provided string
RLAPI const char *TextToPascal(const char *text);                     // Get Pascal case notation version of provided string
RLAPI int TextToInteger(const char *text);                            // Get integer value from text (negative values not supported)
RLAPI char *TextToUtf8(int *codepoints, int length);                  // Encode text codepoint into utf8 text (memory must be freed!)

// UTF8 text strings management functions
RLAPI int *GetCodepoints(const char *text, int *count);               // Get all codepoints in a string, codepoints count returned by parameters
RLAPI int GetCodepointsCount(const char *text);                       // Get total number of characters (codepoints) in a UTF8 encoded string
RLAPI int GetNextCodepoint(const char *text, int *bytesProcessed);    // Returns next codepoint in a UTF8 encoded string; 0x3f('?') is returned on failure
RLAPI const char *CodepointToUtf8(int codepoint, int *byteLength);    // Encode codepoint into utf8 text (char array length returned as parameter)

//------------------------------------------------------------------------------------
// Basic 3d Shapes Drawing Functions (Module: models)
//------------------------------------------------------------------------------------

// Basic geometric 3D shapes drawing functions
RLAPI void DrawLine3D(Vector3 startPos, Vector3 endPos, Color color);                                    // Draw a line in 3D world space
RLAPI void DrawPoint3D(Vector3 position, Color color);                                                   // Draw a point in 3D space, actually a small line
RLAPI void DrawCircle3D(Vector3 center, float radius, Vector3 rotationAxis, float rotationAngle, Color color); // Draw a circle in 3D world space
RLAPI void DrawTriangle3D(Vector3 v1, Vector3 v2, Vector3 v3, Color color);                              // Draw a color-filled triangle (vertex in counter-clockwise order!)
RLAPI void DrawTriangleStrip3D(Vector3 *points, int pointsCount, Color color);                           // Draw a triangle strip defined by points
RLAPI void DrawCube(Vector3 position, float width, float height, float length, Color color);             // Draw cube
RLAPI void DrawCubeV(Vector3 position, Vector3 size, Color color);                                       // Draw cube (Vector version)
RLAPI void DrawCubeWires(Vector3 position, float width, float height, float length, Color color);        // Draw cube wires
RLAPI void DrawCubeWiresV(Vector3 position, Vector3 size, Color color);                                  // Draw cube wires (Vector version)
RLAPI void DrawCubeTexture(Texture2D texture, Vector3 position, float width, float height, float length, Color color); // Draw cube textured
RLAPI void DrawSphere(Vector3 centerPos, float radius, Color color);                                     // Draw sphere
RLAPI void DrawSphereEx(Vector3 centerPos, float radius, int rings, int slices, Color color);            // Draw sphere with extended parameters
RLAPI void DrawSphereWires(Vector3 centerPos, float radius, int rings, int slices, Color color);         // Draw sphere wires
RLAPI void DrawCylinder(Vector3 position, float radiusTop, float radiusBottom, float height, int slices, Color color); // Draw a cylinder/cone
RLAPI void DrawCylinderWires(Vector3 position, float radiusTop, float radiusBottom, float height, int slices, Color color); // Draw a cylinder/cone wires
RLAPI void DrawPlane(Vector3 centerPos, Vector2 size, Color color);                                      // Draw a plane XZ
RLAPI void DrawRay(Ray ray, Color color);                                                                // Draw a ray line
RLAPI void DrawGrid(int slices, float spacing);                                                          // Draw a grid (centered at (0, 0, 0))
RLAPI void DrawGizmo(Vector3 position);                                                                  // Draw simple gizmo

//------------------------------------------------------------------------------------
// Model 3d Loading and Drawing Functions (Module: models)
//------------------------------------------------------------------------------------

// Model loading/unloading functions
RLAPI Model LoadModel(const char *fileName);                                                            // Load model from files (meshes and materials)
RLAPI Model LoadModelFromMesh(Mesh mesh);                                                               // Load model from generated mesh (default material)
RLAPI void UnloadModel(Model model);                                                                    // Unload model (including meshes) from memory (RAM and/or VRAM)
RLAPI void UnloadModelKeepMeshes(Model model);                                                          // Unload model (but not meshes) from memory (RAM and/or VRAM)

// Mesh loading/unloading functions
RLAPI Mesh *LoadMeshes(const char *fileName, int *meshCount);                                           // Load meshes from model file
RLAPI void UnloadMesh(Mesh mesh);                                                                       // Unload mesh from memory (RAM and/or VRAM)
RLAPI bool ExportMesh(Mesh mesh, const char *fileName);                                                 // Export mesh data to file, returns true on success

// Material loading/unloading functions
RLAPI Material *LoadMaterials(const char *fileName, int *materialCount);                                // Load materials from model file
RLAPI Material LoadMaterialDefault(void);                                                               // Load default material (Supports: DIFFUSE, SPECULAR, NORMAL maps)
RLAPI void UnloadMaterial(Material material);                                                           // Unload material from GPU memory (VRAM)
RLAPI void SetMaterialTexture(Material *material, int mapType, Texture2D texture);                      // Set texture for a material map type (MAP_DIFFUSE, MAP_SPECULAR...)
RLAPI void SetModelMeshMaterial(Model *model, int meshId, int materialId);                              // Set material for a mesh

// Model animations loading/unloading functions
RLAPI ModelAnimation *LoadModelAnimations(const char *fileName, int *animsCount);                       // Load model animations from file
RLAPI void UpdateModelAnimation(Model model, ModelAnimation anim, int frame);                           // Update model animation pose
RLAPI void UnloadModelAnimation(ModelAnimation anim);                                                   // Unload animation data
RLAPI bool IsModelAnimationValid(Model model, ModelAnimation anim);                                     // Check model animation skeleton match

// Mesh generation functions
RLAPI Mesh GenMeshPoly(int sides, float radius);                                                        // Generate polygonal mesh
RLAPI Mesh GenMeshPlane(float width, float length, int resX, int resZ);                                 // Generate plane mesh (with subdivisions)
RLAPI Mesh GenMeshCube(float width, float height, float length);                                        // Generate cuboid mesh
RLAPI Mesh GenMeshSphere(float radius, int rings, int slices);                                          // Generate sphere mesh (standard sphere)
RLAPI Mesh GenMeshHemiSphere(float radius, int rings, int slices);                                      // Generate half-sphere mesh (no bottom cap)
RLAPI Mesh GenMeshCylinder(float radius, float height, int slices);                                     // Generate cylinder mesh
RLAPI Mesh GenMeshTorus(float radius, float size, int radSeg, int sides);                               // Generate torus mesh
RLAPI Mesh GenMeshKnot(float radius, float size, int radSeg, int sides);                                // Generate trefoil knot mesh
RLAPI Mesh GenMeshHeightmap(Image heightmap, Vector3 size);                                             // Generate heightmap mesh from image data
RLAPI Mesh GenMeshCubicmap(Image cubicmap, Vector3 cubeSize);                                           // Generate cubes-based map mesh from image data

// Mesh manipulation functions
RLAPI BoundingBox MeshBoundingBox(Mesh mesh);                                                           // Compute mesh bounding box limits
RLAPI void MeshTangents(Mesh *mesh);                                                                    // Compute mesh tangents
RLAPI void MeshBinormals(Mesh *mesh);                                                                   // Compute mesh binormals
RLAPI void MeshNormalsSmooth(Mesh *mesh);                                                               // Smooth (average) vertex normals

// Model drawing functions
RLAPI void DrawModel(Model model, Vector3 position, float scale, Color tint);                           // Draw a model (with texture if set)
RLAPI void DrawModelEx(Model model, Vector3 position, Vector3 rotationAxis, float rotationAngle, Vector3 scale, Color tint); // Draw a model with extended parameters
RLAPI void DrawModelWires(Model model, Vector3 position, float scale, Color tint);                      // Draw a model wires (with texture if set)
RLAPI void DrawModelWiresEx(Model model, Vector3 position, Vector3 rotationAxis, float rotationAngle, Vector3 scale, Color tint); // Draw a model wires (with texture if set) with extended parameters
RLAPI void DrawBoundingBox(BoundingBox box, Color color);                                               // Draw bounding box (wires)
RLAPI void DrawBillboard(Camera camera, Texture2D texture, Vector3 center, float size, Color tint);     // Draw a billboard texture
RLAPI void DrawBillboardRec(Camera camera, Texture2D texture, Rectangle source, Vector3 center, float size, Color tint); // Draw a billboard texture defined by source

// Collision detection functions
RLAPI bool CheckCollisionSpheres(Vector3 center1, float radius1, Vector3 center2, float radius2);       // Detect collision between two spheres
RLAPI bool CheckCollisionBoxes(BoundingBox box1, BoundingBox box2);                                     // Detect collision between two bounding boxes
RLAPI bool CheckCollisionBoxSphere(BoundingBox box, Vector3 center, float radius);                      // Detect collision between box and sphere
RLAPI bool CheckCollisionRaySphere(Ray ray, Vector3 center, float radius);                              // Detect collision between ray and sphere
RLAPI bool CheckCollisionRaySphereEx(Ray ray, Vector3 center, float radius, Vector3 *collisionPoint);   // Detect collision between ray and sphere, returns collision point
RLAPI bool CheckCollisionRayBox(Ray ray, BoundingBox box);                                              // Detect collision between ray and box
RLAPI RayHitInfo GetCollisionRayMesh(Ray ray, Mesh mesh, Matrix transform);                             // Get collision info between ray and mesh
RLAPI RayHitInfo GetCollisionRayModel(Ray ray, Model model);                                            // Get collision info between ray and model
RLAPI RayHitInfo GetCollisionRayTriangle(Ray ray, Vector3 p1, Vector3 p2, Vector3 p3);                  // Get collision info between ray and triangle
RLAPI RayHitInfo GetCollisionRayGround(Ray ray, float groundHeight);                                    // Get collision info between ray and ground plane (Y-normal plane)

//------------------------------------------------------------------------------------
// Shaders System Functions (Module: rlgl)
// NOTE: This functions are useless when using OpenGL 1.1
//------------------------------------------------------------------------------------

// Shader loading/unloading functions
RLAPI Shader LoadShader(const char *vsFileName, const char *fsFileName);  // Load shader from files and bind default locations
RLAPI Shader LoadShaderCode(const char *vsCode, const char *fsCode);      // Load shader from code strings and bind default locations
RLAPI void UnloadShader(Shader shader);                                   // Unload shader from GPU memory (VRAM)

RLAPI Shader GetShaderDefault(void);                                      // Get default shader
RLAPI Texture2D GetTextureDefault(void);                                  // Get default texture
RLAPI Texture2D GetShapesTexture(void);                                   // Get texture to draw shapes
RLAPI Rectangle GetShapesTextureRec(void);                                // Get texture rectangle to draw shapes
RLAPI void SetShapesTexture(Texture2D texture, Rectangle source);         // Define default texture used to draw shapes

// Shader configuration functions
RLAPI int GetShaderLocation(Shader shader, const char *uniformName);      // Get shader uniform location
RLAPI int GetShaderLocationAttrib(Shader shader, const char *attribName); // Get shader attribute location
RLAPI void SetShaderValue(Shader shader, int uniformLoc, const void *value, int uniformType);               // Set shader uniform value
RLAPI void SetShaderValueV(Shader shader, int uniformLoc, const void *value, int uniformType, int count);   // Set shader uniform value vector
RLAPI void SetShaderValueMatrix(Shader shader, int uniformLoc, Matrix mat);         // Set shader uniform value (matrix 4x4)
RLAPI void SetShaderValueTexture(Shader shader, int uniformLoc, Texture2D texture); // Set shader uniform value for texture
RLAPI void SetMatrixProjection(Matrix proj);                              // Set a custom projection matrix (replaces internal projection matrix)
RLAPI void SetMatrixModelview(Matrix view);                               // Set a custom modelview matrix (replaces internal modelview matrix)
RLAPI Matrix GetMatrixModelview(void);                                    // Get internal modelview matrix
RLAPI Matrix GetMatrixProjection(void);                                   // Get internal projection matrix

// Texture maps generation (PBR)
// NOTE: Required shaders should be provided
RLAPI TextureCubemap GenTextureCubemap(Shader shader, Texture2D panorama, int size, int format); // Generate cubemap texture from 2D panorama texture
RLAPI TextureCubemap GenTextureIrradiance(Shader shader, TextureCubemap cubemap, int size);      // Generate irradiance texture using cubemap data
RLAPI TextureCubemap GenTexturePrefilter(Shader shader, TextureCubemap cubemap, int size);       // Generate prefilter texture using cubemap data
RLAPI Texture2D GenTextureBRDF(Shader shader, int size);                  // Generate BRDF texture

// Shading begin/end functions
RLAPI void BeginShaderMode(Shader shader);                                // Begin custom shader drawing
RLAPI void EndShaderMode(void);                                           // End custom shader drawing (use default shader)
RLAPI void BeginBlendMode(int mode);                                      // Begin blending mode (alpha, additive, multiplied)
RLAPI void EndBlendMode(void);                                            // End blending mode (reset to default: alpha blending)

// VR control functions
RLAPI void InitVrSimulator(void);                       // Init VR simulator for selected device parameters
RLAPI void CloseVrSimulator(void);                      // Close VR simulator for current device
RLAPI void UpdateVrTracking(Camera *camera);            // Update VR tracking (position and orientation) and camera
RLAPI void SetVrConfiguration(VrDeviceInfo info, Shader distortion);      // Set stereo rendering configuration parameters
RLAPI bool IsVrSimulatorReady(void);                    // Detect if VR simulator is ready
RLAPI void ToggleVrMode(void);                          // Enable/Disable VR experience
RLAPI void BeginVrDrawing(void);                        // Begin VR simulator stereo rendering
RLAPI void EndVrDrawing(void);                          // End VR simulator stereo rendering

//------------------------------------------------------------------------------------
// Audio Loading and Playing Functions (Module: audio)
//------------------------------------------------------------------------------------

// Audio device management functions
RLAPI void InitAudioDevice(void);                                     // Initialize audio device and context
RLAPI void CloseAudioDevice(void);                                    // Close the audio device and context
RLAPI bool IsAudioDeviceReady(void);                                  // Check if audio device has been initialized successfully
RLAPI void SetMasterVolume(float volume);                             // Set master volume (listener)

// Wave/Sound loading/unloading functions
RLAPI Wave LoadWave(const char *fileName);                            // Load wave data from file
RLAPI Wave LoadWaveFromMemory(const char *fileType, const unsigned char *fileData, int dataSize); // Load wave from memory buffer, fileType refers to extension: i.e. "wav"
RLAPI Sound LoadSound(const char *fileName);                          // Load sound from file
RLAPI Sound LoadSoundFromWave(Wave wave);                             // Load sound from wave data
RLAPI void UpdateSound(Sound sound, const void *data, int samplesCount);// Update sound buffer with new data
RLAPI void UnloadWave(Wave wave);                                     // Unload wave data
RLAPI void UnloadSound(Sound sound);                                  // Unload sound
RLAPI bool ExportWave(Wave wave, const char *fileName);               // Export wave data to file, returns true on success
RLAPI bool ExportWaveAsCode(Wave wave, const char *fileName);         // Export wave sample data to code (.h), returns true on success

// Wave/Sound management functions
RLAPI void PlaySound(Sound sound);                                    // Play a sound
RLAPI void StopSound(Sound sound);                                    // Stop playing a sound
RLAPI void PauseSound(Sound sound);                                   // Pause a sound
RLAPI void ResumeSound(Sound sound);                                  // Resume a paused sound
RLAPI void PlaySoundMulti(Sound sound);                               // Play a sound (using multichannel buffer pool)
RLAPI void StopSoundMulti(void);                                      // Stop any sound playing (using multichannel buffer pool)
RLAPI int GetSoundsPlaying(void);                                     // Get number of sounds playing in the multichannel
RLAPI bool IsSoundPlaying(Sound sound);                               // Check if a sound is currently playing
RLAPI void SetSoundVolume(Sound sound, float volume);                 // Set volume for a sound (1.0 is max level)
RLAPI void SetSoundPitch(Sound sound, float pitch);                   // Set pitch for a sound (1.0 is base level)
RLAPI void WaveFormat(Wave *wave, int sampleRate, int sampleSize, int channels);  // Convert wave data to desired format
RLAPI Wave WaveCopy(Wave wave);                                       // Copy a wave to a new wave
RLAPI void WaveCrop(Wave *wave, int initSample, int finalSample);     // Crop a wave to defined samples range
RLAPI float *LoadWaveSamples(Wave wave);                              // Load samples data from wave as a floats array
RLAPI void UnloadWaveSamples(float *samples);                         // Unload samples data loaded with LoadWaveSamples()

// Music management functions
RLAPI Music LoadMusicStream(const char *fileName);                    // Load music stream from file
RLAPI void UnloadMusicStream(Music music);                            // Unload music stream
RLAPI void PlayMusicStream(Music music);                              // Start music playing
RLAPI void UpdateMusicStream(Music music);                            // Updates buffers for music streaming
RLAPI void StopMusicStream(Music music);                              // Stop music playing
RLAPI void PauseMusicStream(Music music);                             // Pause music playing
RLAPI void ResumeMusicStream(Music music);                            // Resume playing paused music
RLAPI bool IsMusicPlaying(Music music);                               // Check if music is playing
RLAPI void SetMusicVolume(Music music, float volume);                 // Set volume for music (1.0 is max level)
RLAPI void SetMusicPitch(Music music, float pitch);                   // Set pitch for a music (1.0 is base level)
RLAPI float GetMusicTimeLength(Music music);                          // Get music time length (in seconds)
RLAPI float GetMusicTimePlayed(Music music);                          // Get current music time played (in seconds)

// AudioStream management functions
RLAPI AudioStream InitAudioStream(unsigned int sampleRate, unsigned int sampleSize, unsigned int channels); // Init audio stream (to stream raw audio pcm data)
RLAPI void UpdateAudioStream(AudioStream stream, const void *data, int samplesCount); // Update audio stream buffers with data
RLAPI void CloseAudioStream(AudioStream stream);                      // Close audio stream and free memory
RLAPI bool IsAudioStreamProcessed(AudioStream stream);                // Check if any audio stream buffers requires refill
RLAPI void PlayAudioStream(AudioStream stream);                       // Play audio stream
RLAPI void PauseAudioStream(AudioStream stream);                      // Pause audio stream
RLAPI void ResumeAudioStream(AudioStream stream);                     // Resume audio stream
RLAPI bool IsAudioStreamPlaying(AudioStream stream);                  // Check if audio stream is playing
RLAPI void StopAudioStream(AudioStream stream);                       // Stop audio stream
RLAPI void SetAudioStreamVolume(AudioStream stream, float volume);    // Set volume for audio stream (1.0 is max level)
RLAPI void SetAudioStreamPitch(AudioStream stream, float pitch);      // Set pitch for audio stream (1.0 is base level)
RLAPI void SetAudioStreamBufferSizeDefault(int size);                 // Default size for new audio streams

#if defined(__cplusplus)
}
#endif

#endif // RAYLIB_H
