rs.h

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/*
    RenderStack  Support library for OpenGL 3+
    Copyright (C) 2010  Timo Suoranta

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef RS_H
#define RS_H

#include "renderstack/rs_platform.h"

#if defined(NDEBUG)
#define RS_ASSERT(x)
#else
#define RS_ASSERT(_expression) if(!(_expression)){rs_application_fail("ASSERTION FAILED:" #_expression "\n file:" __FILE__ "\n");}
#endif

#if defined(__cplusplus)
# define RS_BEGIN_EXTERN_C extern "C" {
# define RS_END_EXTERN_C }
#else
# define RS_BEGIN_EXTERN_C
# define RS_END_EXTERN_C
#endif

#define RS_PI                   3.14159265358979323846f
#define RS_TWO_PI               (2.0f * RS_PI)
#define RS_HALF_PI              (0.5f * RS_PI)
#define RS_EPSILON              (0.00001f)

#define RS_NO_ERROR             0x1000
#define RS_INVALID_ENUM         0x1001
#define RS_INVALID_VALUE        0x1002
#define RS_INVALID_OPERATION    0x1003
#define RS_OUT_OF_MEMORY        0x1004
#define RS_NAME_LENGTH          128
#define RS_MIN(a,b)             ((a)<(b)?(a):(b))
#define RS_MAX(a,b)             ((a)>(b)?(a):(b))
#define RS_NEAR_ZERO(x)         (fabsf(x) <= RS_EPSILON)
#define RS_TOLERANCE(x,y)       (fabsf(x - y) <= RS_EPSILON * RS_MAX(1.0f, RS_MAX(fabsf(x), fabsf(y))))

#define RS_GAMEPAD_DPAD_UP          0x0001
#define RS_GAMEPAD_DPAD_DOWN        0x0002
#define RS_GAMEPAD_DPAD_LEFT        0x0004
#define RS_GAMEPAD_DPAD_RIGHT       0x0008
#define RS_GAMEPAD_START            0x0010
#define RS_GAMEPAD_BACK             0x0020
#define RS_GAMEPAD_LEFT_THUMB       0x0040
#define RS_GAMEPAD_RIGHT_THUMB      0x0080
#define RS_GAMEPAD_LEFT_SHOULDER    0x0100
#define RS_GAMEPAD_RIGHT_SHOULDER   0x0200
#define RS_GAMEPAD_A                0x1000
#define RS_GAMEPAD_B                0x2000
#define RS_GAMEPAD_X                0x4000
#define RS_GAMEPAD_Y                0x8000

struct rs_pointer
{
    int x;
    int y;
    int buttons[3];
    int dx;
    int dy;
};

struct rs_controller
{
    int             state;
    int             buttons;
    unsigned char   left_trigger;
    unsigned char   right_trigger;
    short           lx;
    short           ly;
    short           rx;
    short           ry;
};

struct rs_context
{
    int                         run;
    struct rs_pointer           pointer;
    struct rs_controller        controllers[4];
    int                         keyboard[256];
    int                         need_reshape;
    int                         focus;

    struct rs_platform_context  platform;
};

RS_BEGIN_EXTERN_C

int  rs_application_begin       (void);
void rs_application_end         (char *message);
void rs_application_update      (void);
void rs_application_reshape     (void);
void rs_application_fail        (char *message);

struct rs_context*  rs_context  (void);
struct rs_pointer*  rs_pointer  (void);

RS_END_EXTERN_C

#endif