Initial commit

include/SDL2/SDL2_gfxPrimitives.h

+/* 
+
+SDL2_gfxPrimitives.h: graphics primitives for SDL
+
+Copyright (C) 2012-2014  Andreas Schiffler
+
+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.
+
+Andreas Schiffler -- aschiffler at ferzkopp dot net
+
+*/
+
+#ifndef _SDL2_gfxPrimitives_h
+#define _SDL2_gfxPrimitives_h
+
+#include <math.h>
+#ifndef M_PI
+#define M_PI	3.1415926535897932384626433832795
+#endif
+
+#include "SDL.h"
+
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+	/* ----- Versioning */
+
+#define SDL2_GFXPRIMITIVES_MAJOR	1
+#define SDL2_GFXPRIMITIVES_MINOR	0
+#define SDL2_GFXPRIMITIVES_MICRO	4
+
+
+	/* ---- Function Prototypes */
+
+#ifdef _MSC_VER
+#  if defined(DLL_EXPORT) && !defined(LIBSDL2_GFX_DLL_IMPORT)
+#    define SDL2_GFXPRIMITIVES_SCOPE __declspec(dllexport)
+#  else
+#    ifdef LIBSDL2_GFX_DLL_IMPORT
+#      define SDL2_GFXPRIMITIVES_SCOPE __declspec(dllimport)
+#    endif
+#  endif
+#endif
+#ifndef SDL2_GFXPRIMITIVES_SCOPE
+#  define SDL2_GFXPRIMITIVES_SCOPE extern
+#endif
+
+	/* Note: all ___Color routines expect the color to be in format 0xRRGGBBAA */
+
+	/* Pixel */
+
+	SDL2_GFXPRIMITIVES_SCOPE int pixelColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int pixelRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Horizontal line */
+
+	SDL2_GFXPRIMITIVES_SCOPE int hlineColor(SDL_Renderer * renderer, Sint16 x1, Sint16 x2, Sint16 y, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int hlineRGBA(SDL_Renderer * renderer, Sint16 x1, Sint16 x2, Sint16 y, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Vertical line */
+
+	SDL2_GFXPRIMITIVES_SCOPE int vlineColor(SDL_Renderer * renderer, Sint16 x, Sint16 y1, Sint16 y2, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int vlineRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y1, Sint16 y2, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Rectangle */
+
+	SDL2_GFXPRIMITIVES_SCOPE int rectangleColor(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int rectangleRGBA(SDL_Renderer * renderer, Sint16 x1, Sint16 y1,
+		Sint16 x2, Sint16 y2, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Rounded-Corner Rectangle */
+
+	SDL2_GFXPRIMITIVES_SCOPE int roundedRectangleColor(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Sint16 rad, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int roundedRectangleRGBA(SDL_Renderer * renderer, Sint16 x1, Sint16 y1,
+		Sint16 x2, Sint16 y2, Sint16 rad, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Filled rectangle (Box) */
+
+	SDL2_GFXPRIMITIVES_SCOPE int boxColor(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int boxRGBA(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2,
+		Sint16 y2, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Rounded-Corner Filled rectangle (Box) */
+
+	SDL2_GFXPRIMITIVES_SCOPE int roundedBoxColor(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Sint16 rad, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int roundedBoxRGBA(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2,
+		Sint16 y2, Sint16 rad, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Line */
+
+	SDL2_GFXPRIMITIVES_SCOPE int lineColor(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int lineRGBA(SDL_Renderer * renderer, Sint16 x1, Sint16 y1,
+		Sint16 x2, Sint16 y2, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* AA Line */
+
+	SDL2_GFXPRIMITIVES_SCOPE int aalineColor(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int aalineRGBA(SDL_Renderer * renderer, Sint16 x1, Sint16 y1,
+		Sint16 x2, Sint16 y2, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Thick Line */
+	SDL2_GFXPRIMITIVES_SCOPE int thickLineColor(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, 
+		Uint8 width, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int thickLineRGBA(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, 
+		Uint8 width, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Circle */
+
+	SDL2_GFXPRIMITIVES_SCOPE int circleColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rad, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int circleRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rad, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Arc */
+
+	SDL2_GFXPRIMITIVES_SCOPE int arcColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rad, Sint16 start, Sint16 end, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int arcRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rad, Sint16 start, Sint16 end, 
+		Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* AA Circle */
+
+	SDL2_GFXPRIMITIVES_SCOPE int aacircleColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rad, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int aacircleRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y,
+		Sint16 rad, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Filled Circle */
+
+	SDL2_GFXPRIMITIVES_SCOPE int filledCircleColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 r, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int filledCircleRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y,
+		Sint16 rad, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Ellipse */
+
+	SDL2_GFXPRIMITIVES_SCOPE int ellipseColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int ellipseRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y,
+		Sint16 rx, Sint16 ry, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* AA Ellipse */
+
+	SDL2_GFXPRIMITIVES_SCOPE int aaellipseColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int aaellipseRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y,
+		Sint16 rx, Sint16 ry, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Filled Ellipse */
+
+	SDL2_GFXPRIMITIVES_SCOPE int filledEllipseColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rx, Sint16 ry, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int filledEllipseRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y,
+		Sint16 rx, Sint16 ry, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Pie */
+
+	SDL2_GFXPRIMITIVES_SCOPE int pieColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rad,
+		Sint16 start, Sint16 end, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int pieRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rad,
+		Sint16 start, Sint16 end, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Filled Pie */
+
+	SDL2_GFXPRIMITIVES_SCOPE int filledPieColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rad,
+		Sint16 start, Sint16 end, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int filledPieRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y, Sint16 rad,
+		Sint16 start, Sint16 end, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Trigon */
+
+	SDL2_GFXPRIMITIVES_SCOPE int trigonColor(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Sint16 x3, Sint16 y3, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int trigonRGBA(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Sint16 x3, Sint16 y3,
+		Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* AA-Trigon */
+
+	SDL2_GFXPRIMITIVES_SCOPE int aatrigonColor(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Sint16 x3, Sint16 y3, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int aatrigonRGBA(SDL_Renderer * renderer,  Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Sint16 x3, Sint16 y3,
+		Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Filled Trigon */
+
+	SDL2_GFXPRIMITIVES_SCOPE int filledTrigonColor(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Sint16 x3, Sint16 y3, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int filledTrigonRGBA(SDL_Renderer * renderer, Sint16 x1, Sint16 y1, Sint16 x2, Sint16 y2, Sint16 x3, Sint16 y3,
+		Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Polygon */
+
+	SDL2_GFXPRIMITIVES_SCOPE int polygonColor(SDL_Renderer * renderer, const Sint16 * vx, const Sint16 * vy, int n, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int polygonRGBA(SDL_Renderer * renderer, const Sint16 * vx, const Sint16 * vy,
+		int n, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* AA-Polygon */
+
+	SDL2_GFXPRIMITIVES_SCOPE int aapolygonColor(SDL_Renderer * renderer, const Sint16 * vx, const Sint16 * vy, int n, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int aapolygonRGBA(SDL_Renderer * renderer, const Sint16 * vx, const Sint16 * vy,
+		int n, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Filled Polygon */
+
+	SDL2_GFXPRIMITIVES_SCOPE int filledPolygonColor(SDL_Renderer * renderer, const Sint16 * vx, const Sint16 * vy, int n, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int filledPolygonRGBA(SDL_Renderer * renderer, const Sint16 * vx,
+		const Sint16 * vy, int n, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Textured Polygon */
+
+	SDL2_GFXPRIMITIVES_SCOPE int texturedPolygon(SDL_Renderer * renderer, const Sint16 * vx, const Sint16 * vy, int n, SDL_Surface * texture,int texture_dx,int texture_dy);
+
+	/* Bezier */
+
+	SDL2_GFXPRIMITIVES_SCOPE int bezierColor(SDL_Renderer * renderer, const Sint16 * vx, const Sint16 * vy, int n, int s, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int bezierRGBA(SDL_Renderer * renderer, const Sint16 * vx, const Sint16 * vy,
+		int n, int s, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Characters/Strings */
+
+	SDL2_GFXPRIMITIVES_SCOPE void gfxPrimitivesSetFont(const void *fontdata, Uint32 cw, Uint32 ch);
+	SDL2_GFXPRIMITIVES_SCOPE void gfxPrimitivesSetFontRotation(Uint32 rotation);
+	SDL2_GFXPRIMITIVES_SCOPE int characterColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, char c, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int characterRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y, char c, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+	SDL2_GFXPRIMITIVES_SCOPE int stringColor(SDL_Renderer * renderer, Sint16 x, Sint16 y, const char *s, Uint32 color);
+	SDL2_GFXPRIMITIVES_SCOPE int stringRGBA(SDL_Renderer * renderer, Sint16 x, Sint16 y, const char *s, Uint8 r, Uint8 g, Uint8 b, Uint8 a);
+
+	/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* _SDL2_gfxPrimitives_h */

include/SDL2/SDL2_imageFilter.h

+/*
+
+SDL2_imageFilter.h: byte-image "filter" routines 
+
+Copyright (C) 2012-2014  Andreas Schiffler
+
+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.
+
+Andreas Schiffler -- aschiffler at ferzkopp dot net
+
+*/
+
+#ifndef _SDL2_imageFilter_h
+#define _SDL2_imageFilter_h
+
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+	/* ---- Function Prototypes */
+
+#ifdef _MSC_VER
+#  if defined(DLL_EXPORT) && !defined(LIBSDL2_GFX_DLL_IMPORT)
+#    define SDL2_IMAGEFILTER_SCOPE __declspec(dllexport)
+#  else
+#    ifdef LIBSDL2_GFX_DLL_IMPORT
+#      define SDL2_IMAGEFILTER_SCOPE __declspec(dllimport)
+#    endif
+#  endif
+#endif
+#ifndef SDL2_IMAGEFILTER_SCOPE
+#  define SDL2_IMAGEFILTER_SCOPE extern
+#endif
+
+	/* Comments:                                                                           */
+	/*  1.) MMX functions work best if all data blocks are aligned on a 32 bytes boundary. */
+	/*  2.) Data that is not within an 8 byte boundary is processed using the C routine.   */
+	/*  3.) Convolution routines do not have C routines at this time.                      */
+
+	// Detect MMX capability in CPU
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMMXdetect(void);
+
+	// Force use of MMX off (or turn possible use back on)
+	SDL2_IMAGEFILTER_SCOPE void SDL_imageFilterMMXoff(void);
+	SDL2_IMAGEFILTER_SCOPE void SDL_imageFilterMMXon(void);
+
+	//
+	// All routines return:
+	//   0   OK
+	//  -1   Error (internal error, parameter error)
+	//
+
+	//  SDL_imageFilterAdd: D = saturation255(S1 + S2)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterAdd(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length);
+
+	//  SDL_imageFilterMean: D = S1/2 + S2/2
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMean(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length);
+
+	//  SDL_imageFilterSub: D = saturation0(S1 - S2)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterSub(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length);
+
+	//  SDL_imageFilterAbsDiff: D = | S1 - S2 |
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterAbsDiff(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length);
+
+	//  SDL_imageFilterMult: D = saturation(S1 * S2)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMult(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length);
+
+	//  SDL_imageFilterMultNor: D = S1 * S2   (non-MMX)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMultNor(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length);
+
+	//  SDL_imageFilterMultDivby2: D = saturation255(S1/2 * S2)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMultDivby2(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest,
+		unsigned int length);
+
+	//  SDL_imageFilterMultDivby4: D = saturation255(S1/2 * S2/2)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMultDivby4(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest,
+		unsigned int length);
+
+	//  SDL_imageFilterBitAnd: D = S1 & S2
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterBitAnd(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length);
+
+	//  SDL_imageFilterBitOr: D = S1 | S2
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterBitOr(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length);
+
+	//  SDL_imageFilterDiv: D = S1 / S2   (non-MMX)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterDiv(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length);
+
+	//  SDL_imageFilterBitNegation: D = !S
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterBitNegation(unsigned char *Src1, unsigned char *Dest, unsigned int length);
+
+	//  SDL_imageFilterAddByte: D = saturation255(S + C)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterAddByte(unsigned char *Src1, unsigned char *Dest, unsigned int length, unsigned char C);
+
+	//  SDL_imageFilterAddUint: D = saturation255(S + (uint)C)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterAddUint(unsigned char *Src1, unsigned char *Dest, unsigned int length, unsigned int C);
+
+	//  SDL_imageFilterAddByteToHalf: D = saturation255(S/2 + C)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterAddByteToHalf(unsigned char *Src1, unsigned char *Dest, unsigned int length,
+		unsigned char C);
+
+	//  SDL_imageFilterSubByte: D = saturation0(S - C)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterSubByte(unsigned char *Src1, unsigned char *Dest, unsigned int length, unsigned char C);
+
+	//  SDL_imageFilterSubUint: D = saturation0(S - (uint)C)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterSubUint(unsigned char *Src1, unsigned char *Dest, unsigned int length, unsigned int C);
+
+	//  SDL_imageFilterShiftRight: D = saturation0(S >> N)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftRight(unsigned char *Src1, unsigned char *Dest, unsigned int length, unsigned char N);
+
+	//  SDL_imageFilterShiftRightUint: D = saturation0((uint)S >> N)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftRightUint(unsigned char *Src1, unsigned char *Dest, unsigned int length, unsigned char N);
+
+	//  SDL_imageFilterMultByByte: D = saturation255(S * C)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterMultByByte(unsigned char *Src1, unsigned char *Dest, unsigned int length, unsigned char C);
+
+	//  SDL_imageFilterShiftRightAndMultByByte: D = saturation255((S >> N) * C)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftRightAndMultByByte(unsigned char *Src1, unsigned char *Dest, unsigned int length,
+		unsigned char N, unsigned char C);
+
+	//  SDL_imageFilterShiftLeftByte: D = (S << N)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftLeftByte(unsigned char *Src1, unsigned char *Dest, unsigned int length,
+		unsigned char N);
+
+	//  SDL_imageFilterShiftLeftUint: D = ((uint)S << N)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftLeftUint(unsigned char *Src1, unsigned char *Dest, unsigned int length,
+		unsigned char N);
+
+	//  SDL_imageFilterShiftLeft: D = saturation255(S << N)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterShiftLeft(unsigned char *Src1, unsigned char *Dest, unsigned int length, unsigned char N);
+
+	//  SDL_imageFilterBinarizeUsingThreshold: D = S >= T ? 255:0
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterBinarizeUsingThreshold(unsigned char *Src1, unsigned char *Dest, unsigned int length,
+		unsigned char T);
+
+	//  SDL_imageFilterClipToRange: D = (S >= Tmin) & (S <= Tmax) 255:0
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterClipToRange(unsigned char *Src1, unsigned char *Dest, unsigned int length,
+		unsigned char Tmin, unsigned char Tmax);
+
+	//  SDL_imageFilterNormalizeLinear: D = saturation255((Nmax - Nmin)/(Cmax - Cmin)*(S - Cmin) + Nmin)
+	SDL2_IMAGEFILTER_SCOPE int SDL_imageFilterNormalizeLinear(unsigned char *Src, unsigned char *Dest, unsigned int length, int Cmin,
+		int Cmax, int Nmin, int Nmax);
+
+	/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* _SDL_imageFilter_h */

include/SDL2/SDL2_rotozoom.h

+/*  
+
+SDL2_rotozoom.c: rotozoomer, zoomer and shrinker for 32bit or 8bit surfaces
+
+Copyright (C) 2012-2014  Andreas Schiffler
+
+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.
+
+Andreas Schiffler -- aschiffler at ferzkopp dot net
+
+*/
+
+#ifndef _SDL2_rotozoom_h
+#define _SDL2_rotozoom_h
+
+#include <math.h>
+
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef M_PI
+#define M_PI	3.1415926535897932384626433832795
+#endif
+
+#include "SDL.h"
+
+	/* ---- Defines */
+
+	/*!
+	\brief Disable anti-aliasing (no smoothing).
+	*/
+#define SMOOTHING_OFF		0
+
+	/*!
+	\brief Enable anti-aliasing (smoothing).
+	*/
+#define SMOOTHING_ON		1
+
+	/* ---- Function Prototypes */
+
+#ifdef _MSC_VER
+#  if defined(DLL_EXPORT) && !defined(LIBSDL2_GFX_DLL_IMPORT)
+#    define SDL2_ROTOZOOM_SCOPE __declspec(dllexport)
+#  else
+#    ifdef LIBSDL2_GFX_DLL_IMPORT
+#      define SDL2_ROTOZOOM_SCOPE __declspec(dllimport)
+#    endif
+#  endif
+#endif
+#ifndef SDL2_ROTOZOOM_SCOPE
+#  define SDL2_ROTOZOOM_SCOPE extern
+#endif
+
+	/* 
+
+	Rotozoom functions
+
+	*/
+
+	SDL2_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth);
+
+	SDL2_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurfaceXY
+		(SDL_Surface * src, double angle, double zoomx, double zoomy, int smooth);
+
+
+	SDL2_ROTOZOOM_SCOPE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth,
+		int *dstheight);
+
+	SDL2_ROTOZOOM_SCOPE void rotozoomSurfaceSizeXY
+		(int width, int height, double angle, double zoomx, double zoomy, 
+		int *dstwidth, int *dstheight);
+
+	/* 
+
+	Zooming functions
+
+	*/
+
+	SDL2_ROTOZOOM_SCOPE SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth);
+
+	SDL2_ROTOZOOM_SCOPE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight);
+
+	/* 
+
+	Shrinking functions
+
+	*/     
+
+	SDL2_ROTOZOOM_SCOPE SDL_Surface *shrinkSurface(SDL_Surface * src, int factorx, int factory);
+
+	/* 
+
+	Specialized rotation functions
+
+	*/
+
+	SDL2_ROTOZOOM_SCOPE SDL_Surface* rotateSurface90Degrees(SDL_Surface* src, int numClockwiseTurns);
+
+	/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* _SDL2_rotozoom_h */

include/SDL2/SDL_assert.h

+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
+
+  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 SDL_assert_h_
+#define SDL_assert_h_
+
+#include "SDL_config.h"
+
+#include "begin_code.h"
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef SDL_ASSERT_LEVEL
+#ifdef SDL_DEFAULT_ASSERT_LEVEL
+#define SDL_ASSERT_LEVEL SDL_DEFAULT_ASSERT_LEVEL
+#elif defined(_DEBUG) || defined(DEBUG) || \
+      (defined(__GNUC__) && !defined(__OPTIMIZE__))
+#define SDL_ASSERT_LEVEL 2
+#else
+#define SDL_ASSERT_LEVEL 1
+#endif
+#endif /* SDL_ASSERT_LEVEL */
+
+/*
+These are macros and not first class functions so that the debugger breaks
+on the assertion line and not in some random guts of SDL, and so each
+assert can have unique static variables associated with it.
+*/
+
+#if defined(_MSC_VER)
+/* Don't include intrin.h here because it contains C++ code */
+    extern void __cdecl __debugbreak(void);
+    #define SDL_TriggerBreakpoint() __debugbreak()
+#elif ( (!defined(__NACL__)) && ((defined(__GNUC__) || defined(__clang__)) && (defined(__i386__) || defined(__x86_64__))) )
+    #define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "int $3\n\t" )
+#elif ( defined(__APPLE__) && defined(__arm64__) )  /* this might work on other ARM targets, but this is a known quantity... */
+    #define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "brk #22\n\t" )
+#elif defined(__386__) && defined(__WATCOMC__)
+    #define SDL_TriggerBreakpoint() { _asm { int 0x03 } }
+#elif defined(HAVE_SIGNAL_H) && !defined(__WATCOMC__)
+    #include <signal.h>
+    #define SDL_TriggerBreakpoint() raise(SIGTRAP)
+#else
+    /* How do we trigger breakpoints on this platform? */
+    #define SDL_TriggerBreakpoint()
+#endif
+
+#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 supports __func__ as a standard. */
+#   define SDL_FUNCTION __func__
+#elif ((__GNUC__ >= 2) || defined(_MSC_VER) || defined (__WATCOMC__))
+#   define SDL_FUNCTION __FUNCTION__
+#else
+#   define SDL_FUNCTION "???"
+#endif
+#define SDL_FILE    __FILE__
+#define SDL_LINE    __LINE__
+
+/*
+sizeof (x) makes the compiler still parse the expression even without
+assertions enabled, so the code is always checked at compile time, but
+doesn't actually generate code for it, so there are no side effects or
+expensive checks at run time, just the constant size of what x WOULD be,
+which presumably gets optimized out as unused.
+This also solves the problem of...
+
+    int somevalue = blah();
+    SDL_assert(somevalue == 1);
+
+...which would cause compiles to complain that somevalue is unused if we
+disable assertions.
+*/
+
+/* "while (0,0)" fools Microsoft's compiler's /W4 warning level into thinking
+    this condition isn't constant. And looks like an owl's face! */
+#ifdef _MSC_VER  /* stupid /W4 warnings. */
+#define SDL_NULL_WHILE_LOOP_CONDITION (0,0)
+#else
+#define SDL_NULL_WHILE_LOOP_CONDITION (0)
+#endif
+
+#define SDL_disabled_assert(condition) \
+    do { (void) sizeof ((condition)); } while (SDL_NULL_WHILE_LOOP_CONDITION)
+
+typedef enum
+{
+    SDL_ASSERTION_RETRY,  /**< Retry the assert immediately. */
+    SDL_ASSERTION_BREAK,  /**< Make the debugger trigger a breakpoint. */
+    SDL_ASSERTION_ABORT,  /**< Terminate the program. */
+    SDL_ASSERTION_IGNORE,  /**< Ignore the assert. */
+    SDL_ASSERTION_ALWAYS_IGNORE  /**< Ignore the assert from now on. */
+} SDL_AssertState;
+
+typedef struct SDL_AssertData
+{
+    int always_ignore;
+    unsigned int trigger_count;
+    const char *condition;
+    const char *filename;
+    int linenum;
+    const char *function;
+    const struct SDL_AssertData *next;
+} SDL_AssertData;
+
+#if (SDL_ASSERT_LEVEL > 0)
+
+/* Never call this directly. Use the SDL_assert* macros. */
+extern DECLSPEC SDL_AssertState SDLCALL SDL_ReportAssertion(SDL_AssertData *,
+                                                             const char *,
+                                                             const char *, int)
+#if defined(__clang__)
+#if __has_feature(attribute_analyzer_noreturn)
+/* this tells Clang's static analysis that we're a custom assert function,
+   and that the analyzer should assume the condition was always true past this
+   SDL_assert test. */
+   __attribute__((analyzer_noreturn))
+#endif
+#endif
+;
+
+/* the do {} while(0) avoids dangling else problems:
+    if (x) SDL_assert(y); else blah();
+       ... without the do/while, the "else" could attach to this macro's "if".
+   We try to handle just the minimum we need here in a macro...the loop,
+   the static vars, and break points. The heavy lifting is handled in
+   SDL_ReportAssertion(), in SDL_assert.c.
+*/
+#define SDL_enabled_assert(condition) \
+    do { \
+        while ( !(condition) ) { \
+            static struct SDL_AssertData sdl_assert_data = { \
+                0, 0, #condition, 0, 0, 0, 0 \
+            }; \
+            const SDL_AssertState sdl_assert_state = SDL_ReportAssertion(&sdl_assert_data, SDL_FUNCTION, SDL_FILE, SDL_LINE); \
+            if (sdl_assert_state == SDL_ASSERTION_RETRY) { \
+                continue; /* go again. */ \
+            } else if (sdl_assert_state == SDL_ASSERTION_BREAK) { \
+                SDL_TriggerBreakpoint(); \
+            } \
+            break; /* not retrying. */ \
+        } \
+    } while (SDL_NULL_WHILE_LOOP_CONDITION)
+
+#endif  /* enabled assertions support code */
+
+/* Enable various levels of assertions. */
+#if SDL_ASSERT_LEVEL == 0   /* assertions disabled */
+#   define SDL_assert(condition) SDL_disabled_assert(condition)
+#   define SDL_assert_release(condition) SDL_disabled_assert(condition)
+#   define SDL_assert_paranoid(condition) SDL_disabled_assert(condition)
+#elif SDL_ASSERT_LEVEL == 1  /* release settings. */
+#   define SDL_assert(condition) SDL_disabled_assert(condition)
+#   define SDL_assert_release(condition) SDL_enabled_assert(condition)
+#   define SDL_assert_paranoid(condition) SDL_disabled_assert(condition)
+#elif SDL_ASSERT_LEVEL == 2  /* normal settings. */
+#   define SDL_assert(condition) SDL_enabled_assert(condition)
+#   define SDL_assert_release(condition) SDL_enabled_assert(condition)
+#   define SDL_assert_paranoid(condition) SDL_disabled_assert(condition)
+#elif SDL_ASSERT_LEVEL == 3  /* paranoid settings. */
+#   define SDL_assert(condition) SDL_enabled_assert(condition)
+#   define SDL_assert_release(condition) SDL_enabled_assert(condition)
+#   define SDL_assert_paranoid(condition) SDL_enabled_assert(condition)
+#else
+#   error Unknown assertion level.
+#endif
+
+/* this assertion is never disabled at any level. */
+#define SDL_assert_always(condition) SDL_enabled_assert(condition)
+
+
+typedef SDL_AssertState (SDLCALL *SDL_AssertionHandler)(
+                                 const SDL_AssertData* data, void* userdata);
+
+/**
+ *  \brief Set an application-defined assertion handler.
+ *
+ *  This allows an app to show its own assertion UI and/or force the
+ *  response to an assertion failure. If the app doesn't provide this, SDL
+ *  will try to do the right thing, popping up a system-specific GUI dialog,
+ *  and probably minimizing any fullscreen windows.
+ *
+ *  This callback may fire from any thread, but it runs wrapped in a mutex, so
+ *  it will only fire from one thread at a time.
+ *
+ *  Setting the callback to NULL restores SDL's original internal handler.
+ *
+ *  This callback is NOT reset to SDL's internal handler upon SDL_Quit()!
+ *
+ *  Return SDL_AssertState value of how to handle the assertion failure.
+ *
+ *  \param handler Callback function, called when an assertion fails.
+ *  \param userdata A pointer passed to the callback as-is.
+ */
+extern DECLSPEC void SDLCALL SDL_SetAssertionHandler(
+                                            SDL_AssertionHandler handler,
+                                            void *userdata);
+
+/**
+ *  \brief Get the default assertion handler.
+ *
+ *  This returns the function pointer that is called by default when an
+ *   assertion is triggered. This is an internal function provided by SDL,
+ *   that is used for assertions when SDL_SetAssertionHandler() hasn't been
+ *   used to provide a different function.
+ *
+ *  \return The default SDL_AssertionHandler that is called when an assert triggers.
+ */
+extern DECLSPEC SDL_AssertionHandler SDLCALL SDL_GetDefaultAssertionHandler(void);
+
+/**
+ *  \brief Get the current assertion handler.
+ *
+ *  This returns the function pointer that is called when an assertion is
+ *   triggered. This is either the value last passed to
+ *   SDL_SetAssertionHandler(), or if no application-specified function is
+ *   set, is equivalent to calling SDL_GetDefaultAssertionHandler().
+ *
+ *   \param puserdata Pointer to a void*, which will store the "userdata"
+ *                    pointer that was passed to SDL_SetAssertionHandler().
+ *                    This value will always be NULL for the default handler.
+ *                    If you don't care about this data, it is safe to pass
+ *                    a NULL pointer to this function to ignore it.
+ *  \return The SDL_AssertionHandler that is called when an assert triggers.
+ */
+extern DECLSPEC SDL_AssertionHandler SDLCALL SDL_GetAssertionHandler(void **puserdata);
+
+/**
+ *  \brief Get a list of all assertion failures.
+ *
+ *  Get all assertions triggered since last call to SDL_ResetAssertionReport(),
+ *  or the start of the program.
+ *
+ *  The proper way to examine this data looks something like this:
+ *
+ *  <code>
+ *  const SDL_AssertData *item = SDL_GetAssertionReport();
+ *  while (item) {
+ *      printf("'%s', %s (%s:%d), triggered %u times, always ignore: %s.\\n",
+ *             item->condition, item->function, item->filename,
+ *             item->linenum, item->trigger_count,
+ *             item->always_ignore ? "yes" : "no");
+ *      item = item->next;
+ *  }
+ *  </code>
+ *
+ *  \return List of all assertions.
+ *  \sa SDL_ResetAssertionReport
+ */
+extern DECLSPEC const SDL_AssertData * SDLCALL SDL_GetAssertionReport(void);
+
+/**
+ *  \brief Reset the list of all assertion failures.
+ *
+ *  Reset list of all assertions triggered.
+ *
+ *  \sa SDL_GetAssertionReport
+ */
+extern DECLSPEC void SDLCALL SDL_ResetAssertionReport(void);
+
+
+/* these had wrong naming conventions until 2.0.4. Please update your app! */
+#define SDL_assert_state SDL_AssertState
+#define SDL_assert_data SDL_AssertData
+
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include "close_code.h"
+
+#endif /* SDL_assert_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

include/SDL2/SDL_atomic.h

+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
+
+  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.
+*/
+
+/**
+ * \file SDL_atomic.h
+ *
+ * Atomic operations.
+ *
+ * IMPORTANT:
+ * If you are not an expert in concurrent lockless programming, you should
+ * only be using the atomic lock and reference counting functions in this
+ * file.  In all other cases you should be protecting your data structures
+ * with full mutexes.
+ *
+ * The list of "safe" functions to use are:
+ *  SDL_AtomicLock()
+ *  SDL_AtomicUnlock()
+ *  SDL_AtomicIncRef()
+ *  SDL_AtomicDecRef()
+ *
+ * Seriously, here be dragons!
+ * ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+ *
+ * You can find out a little more about lockless programming and the
+ * subtle issues that can arise here:
+ * http://msdn.microsoft.com/en-us/library/ee418650%28v=vs.85%29.aspx
+ *
+ * There's also lots of good information here:
+ * http://www.1024cores.net/home/lock-free-algorithms
+ * http://preshing.com/
+ *
+ * These operations may or may not actually be implemented using
+ * processor specific atomic operations. When possible they are
+ * implemented as true processor specific atomic operations. When that
+ * is not possible the are implemented using locks that *do* use the
+ * available atomic operations.
+ *
+ * All of the atomic operations that modify memory are full memory barriers.
+ */
+
+#ifndef SDL_atomic_h_
+#define SDL_atomic_h_
+
+#include "SDL_stdinc.h"
+#include "SDL_platform.h"
+
+#include "begin_code.h"
+
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \name SDL AtomicLock
+ *
+ * The atomic locks are efficient spinlocks using CPU instructions,
+ * but are vulnerable to starvation and can spin forever if a thread
+ * holding a lock has been terminated.  For this reason you should
+ * minimize the code executed inside an atomic lock and never do
+ * expensive things like API or system calls while holding them.
+ *
+ * The atomic locks are not safe to lock recursively.
+ *
+ * Porting Note:
+ * The spin lock functions and type are required and can not be
+ * emulated because they are used in the atomic emulation code.
+ */
+/* @{ */
+
+typedef int SDL_SpinLock;
+
+/**
+ * \brief Try to lock a spin lock by setting it to a non-zero value.
+ *
+ * \param lock Points to the lock.
+ *
+ * \return SDL_TRUE if the lock succeeded, SDL_FALSE if the lock is already held.
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_AtomicTryLock(SDL_SpinLock *lock);
+
+/**
+ * \brief Lock a spin lock by setting it to a non-zero value.
+ *
+ * \param lock Points to the lock.
+ */
+extern DECLSPEC void SDLCALL SDL_AtomicLock(SDL_SpinLock *lock);
+
+/**
+ * \brief Unlock a spin lock by setting it to 0. Always returns immediately
+ *
+ * \param lock Points to the lock.
+ */
+extern DECLSPEC void SDLCALL SDL_AtomicUnlock(SDL_SpinLock *lock);
+
+/* @} *//* SDL AtomicLock */
+
+
+/**
+ * The compiler barrier prevents the compiler from reordering
+ * reads and writes to globally visible variables across the call.
+ */
+#if defined(_MSC_VER) && (_MSC_VER > 1200) && !defined(__clang__)
+void _ReadWriteBarrier(void);
+#pragma intrinsic(_ReadWriteBarrier)
+#define SDL_CompilerBarrier()   _ReadWriteBarrier()
+#elif (defined(__GNUC__) && !defined(__EMSCRIPTEN__)) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x5120))
+/* This is correct for all CPUs when using GCC or Solaris Studio 12.1+. */
+#define SDL_CompilerBarrier()   __asm__ __volatile__ ("" : : : "memory")
+#elif defined(__WATCOMC__)
+extern _inline void SDL_CompilerBarrier (void);
+#pragma aux SDL_CompilerBarrier = "" parm [] modify exact [];
+#else
+#define SDL_CompilerBarrier()   \
+{ SDL_SpinLock _tmp = 0; SDL_AtomicLock(&_tmp); SDL_AtomicUnlock(&_tmp); }
+#endif
+
+/**
+ * Memory barriers are designed to prevent reads and writes from being
+ * reordered by the compiler and being seen out of order on multi-core CPUs.
+ *
+ * A typical pattern would be for thread A to write some data and a flag,
+ * and for thread B to read the flag and get the data. In this case you
+ * would insert a release barrier between writing the data and the flag,
+ * guaranteeing that the data write completes no later than the flag is
+ * written, and you would insert an acquire barrier between reading the
+ * flag and reading the data, to ensure that all the reads associated
+ * with the flag have completed.
+ *
+ * In this pattern you should always see a release barrier paired with
+ * an acquire barrier and you should gate the data reads/writes with a
+ * single flag variable.
+ *
+ * For more information on these semantics, take a look at the blog post:
+ * http://preshing.com/20120913/acquire-and-release-semantics
+ */
+extern DECLSPEC void SDLCALL SDL_MemoryBarrierReleaseFunction(void);
+extern DECLSPEC void SDLCALL SDL_MemoryBarrierAcquireFunction(void);
+
+#if defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
+#define SDL_MemoryBarrierRelease()   __asm__ __volatile__ ("lwsync" : : : "memory")
+#define SDL_MemoryBarrierAcquire()   __asm__ __volatile__ ("lwsync" : : : "memory")
+#elif defined(__GNUC__) && defined(__aarch64__)
+#define SDL_MemoryBarrierRelease()   __asm__ __volatile__ ("dmb ish" : : : "memory")
+#define SDL_MemoryBarrierAcquire()   __asm__ __volatile__ ("dmb ish" : : : "memory")
+#elif defined(__GNUC__) && defined(__arm__)
+#if 0 /* defined(__LINUX__) || defined(__ANDROID__) */
+/* Information from:
+   https://chromium.googlesource.com/chromium/chromium/+/trunk/base/atomicops_internals_arm_gcc.h#19
+
+   The Linux kernel provides a helper function which provides the right code for a memory barrier,
+   hard-coded at address 0xffff0fa0
+*/
+typedef void (*SDL_KernelMemoryBarrierFunc)();
+#define SDL_MemoryBarrierRelease()	((SDL_KernelMemoryBarrierFunc)0xffff0fa0)()
+#define SDL_MemoryBarrierAcquire()	((SDL_KernelMemoryBarrierFunc)0xffff0fa0)()
+#elif 0 /* defined(__QNXNTO__) */
+#include <sys/cpuinline.h>
+
+#define SDL_MemoryBarrierRelease()   __cpu_membarrier()
+#define SDL_MemoryBarrierAcquire()   __cpu_membarrier()
+#else
+#if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__) || defined(__ARM_ARCH_8A__)
+#define SDL_MemoryBarrierRelease()   __asm__ __volatile__ ("dmb ish" : : : "memory")
+#define SDL_MemoryBarrierAcquire()   __asm__ __volatile__ ("dmb ish" : : : "memory")
+#elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_5TE__)
+#ifdef __thumb__
+/* The mcr instruction isn't available in thumb mode, use real functions */
+#define SDL_MEMORY_BARRIER_USES_FUNCTION
+#define SDL_MemoryBarrierRelease()   SDL_MemoryBarrierReleaseFunction()
+#define SDL_MemoryBarrierAcquire()   SDL_MemoryBarrierAcquireFunction()
+#else
+#define SDL_MemoryBarrierRelease()   __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
+#define SDL_MemoryBarrierAcquire()   __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
+#endif /* __thumb__ */
+#else
+#define SDL_MemoryBarrierRelease()   __asm__ __volatile__ ("" : : : "memory")
+#define SDL_MemoryBarrierAcquire()   __asm__ __volatile__ ("" : : : "memory")
+#endif /* __LINUX__ || __ANDROID__ */
+#endif /* __GNUC__ && __arm__ */
+#else
+#if (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x5120))
+/* This is correct for all CPUs on Solaris when using Solaris Studio 12.1+. */
+#include <mbarrier.h>
+#define SDL_MemoryBarrierRelease()  __machine_rel_barrier()
+#define SDL_MemoryBarrierAcquire()  __machine_acq_barrier()
+#else
+/* This is correct for the x86 and x64 CPUs, and we'll expand this over time. */
+#define SDL_MemoryBarrierRelease()  SDL_CompilerBarrier()
+#define SDL_MemoryBarrierAcquire()  SDL_CompilerBarrier()
+#endif
+#endif
+
+/**
+ * \brief A type representing an atomic integer value.  It is a struct
+ *        so people don't accidentally use numeric operations on it.
+ */
+typedef struct { int value; } SDL_atomic_t;
+
+/**
+ * \brief Set an atomic variable to a new value if it is currently an old value.
+ *
+ * \return SDL_TRUE if the atomic variable was set, SDL_FALSE otherwise.
+ *
+ * \note If you don't know what this function is for, you shouldn't use it!
+*/
+extern DECLSPEC SDL_bool SDLCALL SDL_AtomicCAS(SDL_atomic_t *a, int oldval, int newval);
+
+/**
+ * \brief Set an atomic variable to a value.
+ *
+ * \return The previous value of the atomic variable.
+ */
+extern DECLSPEC int SDLCALL SDL_AtomicSet(SDL_atomic_t *a, int v);
+
+/**
+ * \brief Get the value of an atomic variable
+ */
+extern DECLSPEC int SDLCALL SDL_AtomicGet(SDL_atomic_t *a);
+
+/**
+ * \brief Add to an atomic variable.
+ *
+ * \return The previous value of the atomic variable.
+ *
+ * \note This same style can be used for any number operation
+ */
+extern DECLSPEC int SDLCALL SDL_AtomicAdd(SDL_atomic_t *a, int v);
+
+/**
+ * \brief Increment an atomic variable used as a reference count.
+ */
+#ifndef SDL_AtomicIncRef
+#define SDL_AtomicIncRef(a)    SDL_AtomicAdd(a, 1)
+#endif
+
+/**
+ * \brief Decrement an atomic variable used as a reference count.
+ *
+ * \return SDL_TRUE if the variable reached zero after decrementing,
+ *         SDL_FALSE otherwise
+ */
+#ifndef SDL_AtomicDecRef
+#define SDL_AtomicDecRef(a)    (SDL_AtomicAdd(a, -1) == 1)
+#endif
+
+/**
+ * \brief Set a pointer to a new value if it is currently an old value.
+ *
+ * \return SDL_TRUE if the pointer was set, SDL_FALSE otherwise.
+ *
+ * \note If you don't know what this function is for, you shouldn't use it!
+*/
+extern DECLSPEC SDL_bool SDLCALL SDL_AtomicCASPtr(void **a, void *oldval, void *newval);
+
+/**
+ * \brief Set a pointer to a value atomically.
+ *
+ * \return The previous value of the pointer.
+ */
+extern DECLSPEC void* SDLCALL SDL_AtomicSetPtr(void **a, void* v);
+
+/**
+ * \brief Get the value of a pointer atomically.
+ */
+extern DECLSPEC void* SDLCALL SDL_AtomicGetPtr(void **a);
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+
+#include "close_code.h"
+
+#endif /* SDL_atomic_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

include/SDL2/SDL_bits.h

+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
+
+  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.
+*/
+
+/**
+ *  \file SDL_bits.h
+ *
+ *  Functions for fiddling with bits and bitmasks.
+ */
+
+#ifndef SDL_bits_h_
+#define SDL_bits_h_
+
+#include "SDL_stdinc.h"
+
+#include "begin_code.h"
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *  \file SDL_bits.h
+ */
+
+/**
+ *  Get the index of the most significant bit. Result is undefined when called
+ *  with 0. This operation can also be stated as "count leading zeroes" and
+ *  "log base 2".
+ *
+ *  \return Index of the most significant bit, or -1 if the value is 0.
+ */
+#if defined(__WATCOMC__) && defined(__386__)
+extern _inline int _SDL_clz_watcom (Uint32);
+#pragma aux _SDL_clz_watcom = \
+    "bsr eax, eax" \
+    "xor eax, 31" \
+    parm [eax] nomemory \
+    value [eax] \
+    modify exact [eax] nomemory;
+#endif
+
+SDL_FORCE_INLINE int
+SDL_MostSignificantBitIndex32(Uint32 x)
+{
+#if defined(__GNUC__) && (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
+    /* Count Leading Zeroes builtin in GCC.
+     * http://gcc.gnu.org/onlinedocs/gcc-4.3.4/gcc/Other-Builtins.html
+     */
+    if (x == 0) {
+        return -1;
+    }
+    return 31 - __builtin_clz(x);
+#elif defined(__WATCOMC__) && defined(__386__)
+    if (x == 0) {
+        return -1;
+    }
+    return 31 - _SDL_clz_watcom(x);
+#else
+    /* Based off of Bit Twiddling Hacks by Sean Eron Anderson
+     * <seander@cs.stanford.edu>, released in the public domain.
+     * http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog
+     */
+    const Uint32 b[] = {0x2, 0xC, 0xF0, 0xFF00, 0xFFFF0000};
+    const int    S[] = {1, 2, 4, 8, 16};
+
+    int msbIndex = 0;
+    int i;
+
+    if (x == 0) {
+        return -1;
+    }
+
+    for (i = 4; i >= 0; i--)
+    {
+        if (x & b[i])
+        {
+            x >>= S[i];
+            msbIndex |= S[i];
+        }
+    }
+
+    return msbIndex;
+#endif
+}
+
+SDL_FORCE_INLINE SDL_bool
+SDL_HasExactlyOneBitSet32(Uint32 x)
+{
+    if (x && !(x & (x - 1))) {
+        return SDL_TRUE;
+    }
+    return SDL_FALSE;
+}
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include "close_code.h"
+
+#endif /* SDL_bits_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

include/SDL2/SDL_blendmode.h

+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
+
+  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.
+*/
+
+/**
+ *  \file SDL_blendmode.h
+ *
+ *  Header file declaring the SDL_BlendMode enumeration
+ */
+
+#ifndef SDL_blendmode_h_
+#define SDL_blendmode_h_
+
+#include "begin_code.h"
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *  \brief The blend mode used in SDL_RenderCopy() and drawing operations.
+ */
+typedef enum
+{
+    SDL_BLENDMODE_NONE = 0x00000000,     /**< no blending
+                                              dstRGBA = srcRGBA */
+    SDL_BLENDMODE_BLEND = 0x00000001,    /**< alpha blending
+                                              dstRGB = (srcRGB * srcA) + (dstRGB * (1-srcA))
+                                              dstA = srcA + (dstA * (1-srcA)) */
+    SDL_BLENDMODE_ADD = 0x00000002,      /**< additive blending
+                                              dstRGB = (srcRGB * srcA) + dstRGB
+                                              dstA = dstA */
+    SDL_BLENDMODE_MOD = 0x00000004,      /**< color modulate
+                                              dstRGB = srcRGB * dstRGB
+                                              dstA = dstA */
+    SDL_BLENDMODE_MUL = 0x00000008,      /**< color multiply
+                                              dstRGB = (srcRGB * dstRGB) + (dstRGB * (1-srcA))
+                                              dstA = (srcA * dstA) + (dstA * (1-srcA)) */
+    SDL_BLENDMODE_INVALID = 0x7FFFFFFF
+
+    /* Additional custom blend modes can be returned by SDL_ComposeCustomBlendMode() */
+
+} SDL_BlendMode;
+
+/**
+ *  \brief The blend operation used when combining source and destination pixel components
+ */
+typedef enum
+{
+    SDL_BLENDOPERATION_ADD              = 0x1,  /**< dst + src: supported by all renderers */
+    SDL_BLENDOPERATION_SUBTRACT         = 0x2,  /**< dst - src : supported by D3D9, D3D11, OpenGL, OpenGLES */
+    SDL_BLENDOPERATION_REV_SUBTRACT     = 0x3,  /**< src - dst : supported by D3D9, D3D11, OpenGL, OpenGLES */
+    SDL_BLENDOPERATION_MINIMUM          = 0x4,  /**< min(dst, src) : supported by D3D11 */
+    SDL_BLENDOPERATION_MAXIMUM          = 0x5   /**< max(dst, src) : supported by D3D11 */
+
+} SDL_BlendOperation;
+
+/**
+ *  \brief The normalized factor used to multiply pixel components
+ */
+typedef enum
+{
+    SDL_BLENDFACTOR_ZERO                = 0x1,  /**< 0, 0, 0, 0 */
+    SDL_BLENDFACTOR_ONE                 = 0x2,  /**< 1, 1, 1, 1 */
+    SDL_BLENDFACTOR_SRC_COLOR           = 0x3,  /**< srcR, srcG, srcB, srcA */
+    SDL_BLENDFACTOR_ONE_MINUS_SRC_COLOR = 0x4,  /**< 1-srcR, 1-srcG, 1-srcB, 1-srcA */
+    SDL_BLENDFACTOR_SRC_ALPHA           = 0x5,  /**< srcA, srcA, srcA, srcA */
+    SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA = 0x6,  /**< 1-srcA, 1-srcA, 1-srcA, 1-srcA */
+    SDL_BLENDFACTOR_DST_COLOR           = 0x7,  /**< dstR, dstG, dstB, dstA */
+    SDL_BLENDFACTOR_ONE_MINUS_DST_COLOR = 0x8,  /**< 1-dstR, 1-dstG, 1-dstB, 1-dstA */
+    SDL_BLENDFACTOR_DST_ALPHA           = 0x9,  /**< dstA, dstA, dstA, dstA */
+    SDL_BLENDFACTOR_ONE_MINUS_DST_ALPHA = 0xA   /**< 1-dstA, 1-dstA, 1-dstA, 1-dstA */
+
+} SDL_BlendFactor;
+
+/**
+ *  \brief Create a custom blend mode, which may or may not be supported by a given renderer
+ *
+ *  \param srcColorFactor source color factor
+ *  \param dstColorFactor destination color factor
+ *  \param colorOperation color operation
+ *  \param srcAlphaFactor source alpha factor
+ *  \param dstAlphaFactor destination alpha factor
+ *  \param alphaOperation alpha operation
+ *
+ *  The result of the blend mode operation will be:
+ *      dstRGB = dstRGB * dstColorFactor colorOperation srcRGB * srcColorFactor
+ *  and
+ *      dstA = dstA * dstAlphaFactor alphaOperation srcA * srcAlphaFactor
+ */
+extern DECLSPEC SDL_BlendMode SDLCALL SDL_ComposeCustomBlendMode(SDL_BlendFactor srcColorFactor,
+                                                                 SDL_BlendFactor dstColorFactor,
+                                                                 SDL_BlendOperation colorOperation,
+                                                                 SDL_BlendFactor srcAlphaFactor,
+                                                                 SDL_BlendFactor dstAlphaFactor,
+                                                                 SDL_BlendOperation alphaOperation);
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include "close_code.h"
+
+#endif /* SDL_blendmode_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

include/SDL2/SDL_clipboard.h

+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
+
+  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.
+*/
+
+/**
+ * \file SDL_clipboard.h
+ *
+ * Include file for SDL clipboard handling
+ */
+
+#ifndef SDL_clipboard_h_
+#define SDL_clipboard_h_
+
+#include "SDL_stdinc.h"
+
+#include "begin_code.h"
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Function prototypes */
+
+/**
+ * \brief Put UTF-8 text into the clipboard
+ *
+ * \sa SDL_GetClipboardText()
+ */
+extern DECLSPEC int SDLCALL SDL_SetClipboardText(const char *text);
+
+/**
+ * \brief Get UTF-8 text from the clipboard, which must be freed with SDL_free()
+ *
+ * \sa SDL_SetClipboardText()
+ */
+extern DECLSPEC char * SDLCALL SDL_GetClipboardText(void);
+
+/**
+ * \brief Returns a flag indicating whether the clipboard exists and contains a text string that is non-empty
+ *
+ * \sa SDL_GetClipboardText()
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_HasClipboardText(void);
+
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include "close_code.h"
+
+#endif /* SDL_clipboard_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */

include/SDL2/SDL_config_android.h

+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
+
+  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 SDL_config_android_h_
+#define SDL_config_android_h_
+#define SDL_config_h_
+
+#include "SDL_platform.h"
+
+/**
+ *  \file SDL_config_android.h
+ *
+ *  This is a configuration that can be used to build SDL for Android
+ */
+
+#include <stdarg.h>
+
+#define HAVE_GCC_ATOMICS    1
+
+#define STDC_HEADERS    1
+#define HAVE_ALLOCA_H       1
+#define HAVE_CTYPE_H    1
+#define HAVE_INTTYPES_H 1
+#define HAVE_LIMITS_H   1
+#define HAVE_MATH_H 1
+#define HAVE_SIGNAL_H 1
+#define HAVE_STDINT_H   1
+#define HAVE_STDIO_H    1
+#define HAVE_STRING_H   1
+#define HAVE_SYS_TYPES_H    1
+
+/* C library functions */
+#define HAVE_MALLOC 1
+#define HAVE_CALLOC 1
+#define HAVE_REALLOC    1
+#define HAVE_FREE   1
+#define HAVE_ALLOCA 1
+#define HAVE_GETENV 1
+#define HAVE_SETENV 1
+#define HAVE_PUTENV 1
+#define HAVE_SETENV 1
+#define HAVE_UNSETENV   1
+#define HAVE_QSORT  1
+#define HAVE_ABS    1
+#define HAVE_BCOPY  1
+#define HAVE_MEMSET 1
+#define HAVE_MEMCPY 1
+#define HAVE_MEMMOVE    1
+#define HAVE_MEMCMP 1
+#define HAVE_STRLEN 1
+#define HAVE_STRLCPY    1
+#define HAVE_STRLCAT    1
+#define HAVE_STRCHR 1
+#define HAVE_STRRCHR    1
+#define HAVE_STRSTR 1
+#define HAVE_STRTOK_R 1
+#define HAVE_STRTOL 1
+#define HAVE_STRTOUL    1
+#define HAVE_STRTOLL    1
+#define HAVE_STRTOULL   1
+#define HAVE_STRTOD 1
+#define HAVE_ATOI   1
+#define HAVE_ATOF 1
+#define HAVE_STRCMP 1
+#define HAVE_STRNCMP    1
+#define HAVE_STRCASECMP 1
+#define HAVE_STRNCASECMP 1
+#define HAVE_VSSCANF 1
+#define HAVE_VSNPRINTF  1
+#define HAVE_ACOS   1
+#define HAVE_ACOSF  1
+#define HAVE_ASIN   1
+#define HAVE_ASINF  1
+#define HAVE_ATAN   1
+#define HAVE_ATANF  1
+#define HAVE_ATAN2  1
+#define HAVE_ATAN2F 1
+#define HAVE_CEIL   1
+#define HAVE_CEILF  1
+#define HAVE_COPYSIGN   1
+#define HAVE_COPYSIGNF  1
+#define HAVE_COS    1
+#define HAVE_COSF   1
+#define HAVE_EXP    1
+#define HAVE_EXPF   1
+#define HAVE_FABS   1
+#define HAVE_FABSF  1
+#define HAVE_FLOOR  1
+#define HAVE_FLOORF 1
+#define HAVE_FMOD   1
+#define HAVE_FMODF  1
+#define HAVE_LOG    1
+#define HAVE_LOGF   1
+#define HAVE_LOG10  1
+#define HAVE_LOG10F 1
+#define HAVE_POW    1
+#define HAVE_POWF   1
+#define HAVE_SCALBN 1
+#define HAVE_SCALBNF    1
+#define HAVE_SIN    1
+#define HAVE_SINF   1
+#define HAVE_SQRT   1
+#define HAVE_SQRTF  1
+#define HAVE_TAN    1
+#define HAVE_TANF   1
+#define HAVE_TRUNC    1
+#define HAVE_TRUNCF   1
+#define HAVE_SIGACTION 1
+#define HAVE_SETJMP 1
+#define HAVE_NANOSLEEP  1
+#define HAVE_SYSCONF    1
+#define HAVE_CLOCK_GETTIME  1
+
+#define SIZEOF_VOIDP 4
+
+/* Enable various audio drivers */
+#define SDL_AUDIO_DRIVER_ANDROID    1
+#define SDL_AUDIO_DRIVER_OPENSLES   1
+#define SDL_AUDIO_DRIVER_DUMMY  1
+
+/* Enable various input drivers */
+#define SDL_JOYSTICK_ANDROID    1
+#define SDL_JOYSTICK_HIDAPI     1
+#define SDL_JOYSTICK_VIRTUAL    1
+#define SDL_HAPTIC_ANDROID  1
+
+/* Enable sensor driver */
+#define SDL_SENSOR_ANDROID  1
+
+/* Enable various shared object loading systems */
+#define SDL_LOADSO_DLOPEN   1
+
+/* Enable various threading systems */
+#define SDL_THREAD_PTHREAD  1
+#define SDL_THREAD_PTHREAD_RECURSIVE_MUTEX  1
+
+/* Enable various timer systems */
+#define SDL_TIMER_UNIX  1
+
+/* Enable various video drivers */
+#define SDL_VIDEO_DRIVER_ANDROID 1
+
+/* Enable OpenGL ES */
+#define SDL_VIDEO_OPENGL_ES 1
+#define SDL_VIDEO_OPENGL_ES2 1
+#define SDL_VIDEO_OPENGL_EGL 1
+#define SDL_VIDEO_RENDER_OGL_ES 1
+#define SDL_VIDEO_RENDER_OGL_ES2    1
+
+/* Enable Vulkan support */
+/* Android does not support Vulkan in native code using the "armeabi" ABI. */
+#if defined(__ARM_ARCH) && __ARM_ARCH < 7
+#define SDL_VIDEO_VULKAN 0
+#else
+#define SDL_VIDEO_VULKAN 1
+#endif
+
+/* Enable system power support */
+#define SDL_POWER_ANDROID 1
+
+/* Enable the filesystem driver */
+#define SDL_FILESYSTEM_ANDROID   1
+
+#endif /* SDL_config_android_h_ */