initial commit

.gitignore

@@ -0,0 +1,5 @@
+.DS_store
+*.so
+*.dSYM
+reload-trigger
+core

compile-core.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+gcc core.c -o core -lSDL2 -g

compile-sdfps.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+gcc sdfps.c glad/src/glad.c -o sdfps.so -shared -lSDL2 -ldl -g --std c99 -I glad/include && echo > reload-trigger

core.c

@@ -0,0 +1,70 @@
+// core.c
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define SDL_MAIN_HANDLED
+#include <SDL2/SDL.h>
+
+#define PROJECT_NAME "sdfps"
+
+#ifdef __WIN32__
+# define SHARED_OBJECT PROJECT_NAME ".dll"
+# define SHARED_OBJECT_ACTIVE SHARED_OBJECT "-active.dll"
+#else
+# define SHARED_OBJECT "./" PROJECT_NAME ".so"
+# define SHARED_OBJECT_ACTIVE SHARED_OBJECT
+#endif
+
+#define SHARED_MAIN PROJECT_NAME "_main"
+
+#ifdef __WIN32__
+/*
+ * windows doesn't let us overwite a dll that's currently in use, but it
+ * seems that macos/linux does
+*/
+int copy_shared_object() {
+	if (system("copy " SHARED_OBJECT " " SHARED_OBJECT_ACTIVE " /Y")) {
+		puts("failed copying to " SHARED_OBJECT_ACTIVE);
+		// puts(SDL_GetError());
+		return 1;
+	}
+	return 0;
+}
+#else
+int copy_shared_object() {
+	return 0;
+}
+#endif
+
+int main(int argc, char **argv) {
+	void *u_data = NULL;
+
+	puts("start.");
+	SDL_Init(SDL_INIT_EVERYTHING);
+
+	while (1) {
+		if (copy_shared_object())
+			break;
+
+		void *so = SDL_LoadObject(SHARED_OBJECT_ACTIVE);
+		if (so == 0) {
+			puts("failed load " SHARED_OBJECT_ACTIVE);
+			puts(SDL_GetError());
+			break;
+		}
+
+		int(*shared_main)(int, char **, void **) = SDL_LoadFunction(so, SHARED_MAIN);
+
+		if(shared_main(argc, argv, &u_data) != 0)
+			break;
+
+		SDL_UnloadObject(so);
+	}
+
+	quit:
+	SDL_Quit();
+	puts("done.");
+	return 0;
+}
+

glad/include/KHR/khrplatform.h

@@ -0,0 +1,311 @@
+#ifndef __khrplatform_h_
+#define __khrplatform_h_
+
+/*
+** Copyright (c) 2008-2018 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+/* Khronos platform-specific types and definitions.
+ *
+ * The master copy of khrplatform.h is maintained in the Khronos EGL
+ * Registry repository at https://github.com/KhronosGroup/EGL-Registry
+ * The last semantic modification to khrplatform.h was at commit ID:
+ *      67a3e0864c2d75ea5287b9f3d2eb74a745936692
+ *
+ * Adopters may modify this file to suit their platform. Adopters are
+ * encouraged to submit platform specific modifications to the Khronos
+ * group so that they can be included in future versions of this file.
+ * Please submit changes by filing pull requests or issues on
+ * the EGL Registry repository linked above.
+ *
+ *
+ * See the Implementer's Guidelines for information about where this file
+ * should be located on your system and for more details of its use:
+ *    http://www.khronos.org/registry/implementers_guide.pdf
+ *
+ * This file should be included as
+ *        #include <KHR/khrplatform.h>
+ * by Khronos client API header files that use its types and defines.
+ *
+ * The types in khrplatform.h should only be used to define API-specific types.
+ *
+ * Types defined in khrplatform.h:
+ *    khronos_int8_t              signed   8  bit
+ *    khronos_uint8_t             unsigned 8  bit
+ *    khronos_int16_t             signed   16 bit
+ *    khronos_uint16_t            unsigned 16 bit
+ *    khronos_int32_t             signed   32 bit
+ *    khronos_uint32_t            unsigned 32 bit
+ *    khronos_int64_t             signed   64 bit
+ *    khronos_uint64_t            unsigned 64 bit
+ *    khronos_intptr_t            signed   same number of bits as a pointer
+ *    khronos_uintptr_t           unsigned same number of bits as a pointer
+ *    khronos_ssize_t             signed   size
+ *    khronos_usize_t             unsigned size
+ *    khronos_float_t             signed   32 bit floating point
+ *    khronos_time_ns_t           unsigned 64 bit time in nanoseconds
+ *    khronos_utime_nanoseconds_t unsigned time interval or absolute time in
+ *                                         nanoseconds
+ *    khronos_stime_nanoseconds_t signed time interval in nanoseconds
+ *    khronos_boolean_enum_t      enumerated boolean type. This should
+ *      only be used as a base type when a client API's boolean type is
+ *      an enum. Client APIs which use an integer or other type for
+ *      booleans cannot use this as the base type for their boolean.
+ *
+ * Tokens defined in khrplatform.h:
+ *
+ *    KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
+ *
+ *    KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
+ *    KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
+ *
+ * Calling convention macros defined in this file:
+ *    KHRONOS_APICALL
+ *    KHRONOS_APIENTRY
+ *    KHRONOS_APIATTRIBUTES
+ *
+ * These may be used in function prototypes as:
+ *
+ *      KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
+ *                                  int arg1,
+ *                                  int arg2) KHRONOS_APIATTRIBUTES;
+ */
+
+#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
+#   define KHRONOS_STATIC 1
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APICALL
+ *-------------------------------------------------------------------------
+ * This precedes the return type of the function in the function prototype.
+ */
+#if defined(KHRONOS_STATIC)
+    /* If the preprocessor constant KHRONOS_STATIC is defined, make the
+     * header compatible with static linking. */
+#   define KHRONOS_APICALL
+#elif defined(_WIN32)
+#   define KHRONOS_APICALL __declspec(dllimport)
+#elif defined (__SYMBIAN32__)
+#   define KHRONOS_APICALL IMPORT_C
+#elif defined(__ANDROID__)
+#   define KHRONOS_APICALL __attribute__((visibility("default")))
+#else
+#   define KHRONOS_APICALL
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIENTRY
+ *-------------------------------------------------------------------------
+ * This follows the return type of the function  and precedes the function
+ * name in the function prototype.
+ */
+#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
+    /* Win32 but not WinCE */
+#   define KHRONOS_APIENTRY __stdcall
+#else
+#   define KHRONOS_APIENTRY
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIATTRIBUTES
+ *-------------------------------------------------------------------------
+ * This follows the closing parenthesis of the function prototype arguments.
+ */
+#if defined (__ARMCC_2__)
+#define KHRONOS_APIATTRIBUTES __softfp
+#else
+#define KHRONOS_APIATTRIBUTES
+#endif
+
+/*-------------------------------------------------------------------------
+ * basic type definitions
+ *-----------------------------------------------------------------------*/
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
+
+
+/*
+ * Using <stdint.h>
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+/*
+ * To support platform where unsigned long cannot be used interchangeably with
+ * inptr_t (e.g. CHERI-extended ISAs), we can use the stdint.h intptr_t.
+ * Ideally, we could just use (u)intptr_t everywhere, but this could result in
+ * ABI breakage if khronos_uintptr_t is changed from unsigned long to
+ * unsigned long long or similar (this results in different C++ name mangling).
+ * To avoid changes for existing platforms, we restrict usage of intptr_t to
+ * platforms where the size of a pointer is larger than the size of long.
+ */
+#if defined(__SIZEOF_LONG__) && defined(__SIZEOF_POINTER__)
+#if __SIZEOF_POINTER__ > __SIZEOF_LONG__
+#define KHRONOS_USE_INTPTR_T
+#endif
+#endif
+
+#elif defined(__VMS ) || defined(__sgi)
+
+/*
+ * Using <inttypes.h>
+ */
+#include <inttypes.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
+
+/*
+ * Win32
+ */
+typedef __int32                 khronos_int32_t;
+typedef unsigned __int32        khronos_uint32_t;
+typedef __int64                 khronos_int64_t;
+typedef unsigned __int64        khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(__sun__) || defined(__digital__)
+
+/*
+ * Sun or Digital
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#if defined(__arch64__) || defined(_LP64)
+typedef long int                khronos_int64_t;
+typedef unsigned long int       khronos_uint64_t;
+#else
+typedef long long int           khronos_int64_t;
+typedef unsigned long long int  khronos_uint64_t;
+#endif /* __arch64__ */
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif 0
+
+/*
+ * Hypothetical platform with no float or int64 support
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#define KHRONOS_SUPPORT_INT64   0
+#define KHRONOS_SUPPORT_FLOAT   0
+
+#else
+
+/*
+ * Generic fallback
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#endif
+
+
+/*
+ * Types that are (so far) the same on all platforms
+ */
+typedef signed   char          khronos_int8_t;
+typedef unsigned char          khronos_uint8_t;
+typedef signed   short int     khronos_int16_t;
+typedef unsigned short int     khronos_uint16_t;
+
+/*
+ * Types that differ between LLP64 and LP64 architectures - in LLP64,
+ * pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
+ * to be the only LLP64 architecture in current use.
+ */
+#ifdef KHRONOS_USE_INTPTR_T
+typedef intptr_t               khronos_intptr_t;
+typedef uintptr_t              khronos_uintptr_t;
+#elif defined(_WIN64)
+typedef signed   long long int khronos_intptr_t;
+typedef unsigned long long int khronos_uintptr_t;
+#else
+typedef signed   long  int     khronos_intptr_t;
+typedef unsigned long  int     khronos_uintptr_t;
+#endif
+
+#if defined(_WIN64)
+typedef signed   long long int khronos_ssize_t;
+typedef unsigned long long int khronos_usize_t;
+#else
+typedef signed   long  int     khronos_ssize_t;
+typedef unsigned long  int     khronos_usize_t;
+#endif
+
+#if KHRONOS_SUPPORT_FLOAT
+/*
+ * Float type
+ */
+typedef          float         khronos_float_t;
+#endif
+
+#if KHRONOS_SUPPORT_INT64
+/* Time types
+ *
+ * These types can be used to represent a time interval in nanoseconds or
+ * an absolute Unadjusted System Time.  Unadjusted System Time is the number
+ * of nanoseconds since some arbitrary system event (e.g. since the last
+ * time the system booted).  The Unadjusted System Time is an unsigned
+ * 64 bit value that wraps back to 0 every 584 years.  Time intervals
+ * may be either signed or unsigned.
+ */
+typedef khronos_uint64_t       khronos_utime_nanoseconds_t;
+typedef khronos_int64_t        khronos_stime_nanoseconds_t;
+#endif
+
+/*
+ * Dummy value used to pad enum types to 32 bits.
+ */
+#ifndef KHRONOS_MAX_ENUM
+#define KHRONOS_MAX_ENUM 0x7FFFFFFF
+#endif
+
+/*
+ * Enumerated boolean type
+ *
+ * Values other than zero should be considered to be true.  Therefore
+ * comparisons should not be made against KHRONOS_TRUE.
+ */
+typedef enum {
+    KHRONOS_FALSE = 0,
+    KHRONOS_TRUE  = 1,
+    KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
+} khronos_boolean_enum_t;
+
+#endif /* __khrplatform_h_ */

glad/src/glad.c

@@ -0,0 +1,689 @@
+/*
+
+    OpenGL ES loader generated by glad 0.1.35 on Thu Mar 17 20:03:09 2022.
+
+    Language/Generator: C/C++
+    Specification: gl
+    APIs: gles2=3.0
+    Profile: core
+    Extensions:
+        
+    Loader: True
+    Local files: False
+    Omit khrplatform: False
+    Reproducible: False
+
+    Commandline:
+        --profile="core" --api="gles2=3.0" --generator="c" --spec="gl" --extensions=""
+    Online:
+        https://glad.dav1d.de/#profile=core&language=c&specification=gl&loader=on&api=gles2%3D3.0
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <glad/glad.h>
+
+struct gladGLversionStruct GLVersion = { 0, 0 };
+
+#if defined(GL_ES_VERSION_3_0) || defined(GL_VERSION_3_0)
+#define _GLAD_IS_SOME_NEW_VERSION 1
+#endif
+
+static int max_loaded_major;
+static int max_loaded_minor;
+
+static const char *exts = NULL;
+static int num_exts_i = 0;
+static char **exts_i = NULL;
+
+static int get_exts(void) {
+#ifdef _GLAD_IS_SOME_NEW_VERSION
+    if(max_loaded_major < 3) {
+#endif
+        exts = (const char *)glGetString(GL_EXTENSIONS);
+#ifdef _GLAD_IS_SOME_NEW_VERSION
+    } else {
+        unsigned int index;
+
+        num_exts_i = 0;
+        glGetIntegerv(GL_NUM_EXTENSIONS, &num_exts_i);
+        if (num_exts_i > 0) {
+            exts_i = (char **)malloc((size_t)num_exts_i * (sizeof *exts_i));
+        }
+
+        if (exts_i == NULL) {
+            return 0;
+        }
+
+        for(index = 0; index < (unsigned)num_exts_i; index++) {
+            const char *gl_str_tmp = (const char*)glGetStringi(GL_EXTENSIONS, index);
+            size_t len = strlen(gl_str_tmp);
+
+            char *local_str = (char*)malloc((len+1) * sizeof(char));
+            if(local_str != NULL) {
+                memcpy(local_str, gl_str_tmp, (len+1) * sizeof(char));
+            }
+            exts_i[index] = local_str;
+        }
+    }
+#endif
+    return 1;
+}
+
+static void free_exts(void) {
+    if (exts_i != NULL) {
+        int index;
+        for(index = 0; index < num_exts_i; index++) {
+            free((char *)exts_i[index]);
+        }
+        free((void *)exts_i);
+        exts_i = NULL;
+    }
+}
+
+static int has_ext(const char *ext) {
+#ifdef _GLAD_IS_SOME_NEW_VERSION
+    if(max_loaded_major < 3) {
+#endif
+        const char *extensions;
+        const char *loc;
+        const char *terminator;
+        extensions = exts;
+        if(extensions == NULL || ext == NULL) {
+            return 0;
+        }
+
+        while(1) {
+            loc = strstr(extensions, ext);
+            if(loc == NULL) {
+                return 0;
+            }
+
+            terminator = loc + strlen(ext);
+            if((loc == extensions || *(loc - 1) == ' ') &&
+                (*terminator == ' ' || *terminator == '\0')) {
+                return 1;
+            }
+            extensions = terminator;
+        }
+#ifdef _GLAD_IS_SOME_NEW_VERSION
+    } else {
+        int index;
+        if(exts_i == NULL) return 0;
+        for(index = 0; index < num_exts_i; index++) {
+            const char *e = exts_i[index];
+
+            if(exts_i[index] != NULL && strcmp(e, ext) == 0) {
+                return 1;
+            }
+        }
+    }
+#endif
+
+    return 0;
+}
+int GLAD_GL_ES_VERSION_2_0 = 0;
+int GLAD_GL_ES_VERSION_3_0 = 0;
+PFNGLACTIVETEXTUREPROC glad_glActiveTexture = NULL;
+PFNGLATTACHSHADERPROC glad_glAttachShader = NULL;
+PFNGLBEGINQUERYPROC glad_glBeginQuery = NULL;
+PFNGLBEGINTRANSFORMFEEDBACKPROC glad_glBeginTransformFeedback = NULL;
+PFNGLBINDATTRIBLOCATIONPROC glad_glBindAttribLocation = NULL;
+PFNGLBINDBUFFERPROC glad_glBindBuffer = NULL;
+PFNGLBINDBUFFERBASEPROC glad_glBindBufferBase = NULL;
+PFNGLBINDBUFFERRANGEPROC glad_glBindBufferRange = NULL;
+PFNGLBINDFRAMEBUFFERPROC glad_glBindFramebuffer = NULL;
+PFNGLBINDRENDERBUFFERPROC glad_glBindRenderbuffer = NULL;
+PFNGLBINDSAMPLERPROC glad_glBindSampler = NULL;
+PFNGLBINDTEXTUREPROC glad_glBindTexture = NULL;
+PFNGLBINDTRANSFORMFEEDBACKPROC glad_glBindTransformFeedback = NULL;
+PFNGLBINDVERTEXARRAYPROC glad_glBindVertexArray = NULL;
+PFNGLBLENDCOLORPROC glad_glBlendColor = NULL;
+PFNGLBLENDEQUATIONPROC glad_glBlendEquation = NULL;
+PFNGLBLENDEQUATIONSEPARATEPROC glad_glBlendEquationSeparate = NULL;
+PFNGLBLENDFUNCPROC glad_glBlendFunc = NULL;
+PFNGLBLENDFUNCSEPARATEPROC glad_glBlendFuncSeparate = NULL;
+PFNGLBLITFRAMEBUFFERPROC glad_glBlitFramebuffer = NULL;
+PFNGLBUFFERDATAPROC glad_glBufferData = NULL;
+PFNGLBUFFERSUBDATAPROC glad_glBufferSubData = NULL;
+PFNGLCHECKFRAMEBUFFERSTATUSPROC glad_glCheckFramebufferStatus = NULL;
+PFNGLCLEARPROC glad_glClear = NULL;
+PFNGLCLEARBUFFERFIPROC glad_glClearBufferfi = NULL;
+PFNGLCLEARBUFFERFVPROC glad_glClearBufferfv = NULL;
+PFNGLCLEARBUFFERIVPROC glad_glClearBufferiv = NULL;
+PFNGLCLEARBUFFERUIVPROC glad_glClearBufferuiv = NULL;
+PFNGLCLEARCOLORPROC glad_glClearColor = NULL;
+PFNGLCLEARDEPTHFPROC glad_glClearDepthf = NULL;
+PFNGLCLEARSTENCILPROC glad_glClearStencil = NULL;
+PFNGLCLIENTWAITSYNCPROC glad_glClientWaitSync = NULL;
+PFNGLCOLORMASKPROC glad_glColorMask = NULL;
+PFNGLCOMPILESHADERPROC glad_glCompileShader = NULL;
+PFNGLCOMPRESSEDTEXIMAGE2DPROC glad_glCompressedTexImage2D = NULL;
+PFNGLCOMPRESSEDTEXIMAGE3DPROC glad_glCompressedTexImage3D = NULL;
+PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC glad_glCompressedTexSubImage2D = NULL;
+PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC glad_glCompressedTexSubImage3D = NULL;
+PFNGLCOPYBUFFERSUBDATAPROC glad_glCopyBufferSubData = NULL;
+PFNGLCOPYTEXIMAGE2DPROC glad_glCopyTexImage2D = NULL;
+PFNGLCOPYTEXSUBIMAGE2DPROC glad_glCopyTexSubImage2D = NULL;
+PFNGLCOPYTEXSUBIMAGE3DPROC glad_glCopyTexSubImage3D = NULL;
+PFNGLCREATEPROGRAMPROC glad_glCreateProgram = NULL;
+PFNGLCREATESHADERPROC glad_glCreateShader = NULL;
+PFNGLCULLFACEPROC glad_glCullFace = NULL;
+PFNGLDELETEBUFFERSPROC glad_glDeleteBuffers = NULL;
+PFNGLDELETEFRAMEBUFFERSPROC glad_glDeleteFramebuffers = NULL;
+PFNGLDELETEPROGRAMPROC glad_glDeleteProgram = NULL;
+PFNGLDELETEQUERIESPROC glad_glDeleteQueries = NULL;
+PFNGLDELETERENDERBUFFERSPROC glad_glDeleteRenderbuffers = NULL;
+PFNGLDELETESAMPLERSPROC glad_glDeleteSamplers = NULL;
+PFNGLDELETESHADERPROC glad_glDeleteShader = NULL;
+PFNGLDELETESYNCPROC glad_glDeleteSync = NULL;
+PFNGLDELETETEXTURESPROC glad_glDeleteTextures = NULL;
+PFNGLDELETETRANSFORMFEEDBACKSPROC glad_glDeleteTransformFeedbacks = NULL;
+PFNGLDELETEVERTEXARRAYSPROC glad_glDeleteVertexArrays = NULL;
+PFNGLDEPTHFUNCPROC glad_glDepthFunc = NULL;
+PFNGLDEPTHMASKPROC glad_glDepthMask = NULL;
+PFNGLDEPTHRANGEFPROC glad_glDepthRangef = NULL;
+PFNGLDETACHSHADERPROC glad_glDetachShader = NULL;
+PFNGLDISABLEPROC glad_glDisable = NULL;
+PFNGLDISABLEVERTEXATTRIBARRAYPROC glad_glDisableVertexAttribArray = NULL;
+PFNGLDRAWARRAYSPROC glad_glDrawArrays = NULL;
+PFNGLDRAWARRAYSINSTANCEDPROC glad_glDrawArraysInstanced = NULL;
+PFNGLDRAWBUFFERSPROC glad_glDrawBuffers = NULL;
+PFNGLDRAWELEMENTSPROC glad_glDrawElements = NULL;
+PFNGLDRAWELEMENTSINSTANCEDPROC glad_glDrawElementsInstanced = NULL;
+PFNGLDRAWRANGEELEMENTSPROC glad_glDrawRangeElements = NULL;
+PFNGLENABLEPROC glad_glEnable = NULL;
+PFNGLENABLEVERTEXATTRIBARRAYPROC glad_glEnableVertexAttribArray = NULL;
+PFNGLENDQUERYPROC glad_glEndQuery = NULL;
+PFNGLENDTRANSFORMFEEDBACKPROC glad_glEndTransformFeedback = NULL;
+PFNGLFENCESYNCPROC glad_glFenceSync = NULL;
+PFNGLFINISHPROC glad_glFinish = NULL;
+PFNGLFLUSHPROC glad_glFlush = NULL;
+PFNGLFLUSHMAPPEDBUFFERRANGEPROC glad_glFlushMappedBufferRange = NULL;
+PFNGLFRAMEBUFFERRENDERBUFFERPROC glad_glFramebufferRenderbuffer = NULL;
+PFNGLFRAMEBUFFERTEXTURE2DPROC glad_glFramebufferTexture2D = NULL;
+PFNGLFRAMEBUFFERTEXTURELAYERPROC glad_glFramebufferTextureLayer = NULL;
+PFNGLFRONTFACEPROC glad_glFrontFace = NULL;
+PFNGLGENBUFFERSPROC glad_glGenBuffers = NULL;
+PFNGLGENFRAMEBUFFERSPROC glad_glGenFramebuffers = NULL;
+PFNGLGENQUERIESPROC glad_glGenQueries = NULL;
+PFNGLGENRENDERBUFFERSPROC glad_glGenRenderbuffers = NULL;
+PFNGLGENSAMPLERSPROC glad_glGenSamplers = NULL;
+PFNGLGENTEXTURESPROC glad_glGenTextures = NULL;
+PFNGLGENTRANSFORMFEEDBACKSPROC glad_glGenTransformFeedbacks = NULL;
+PFNGLGENVERTEXARRAYSPROC glad_glGenVertexArrays = NULL;
+PFNGLGENERATEMIPMAPPROC glad_glGenerateMipmap = NULL;
+PFNGLGETACTIVEATTRIBPROC glad_glGetActiveAttrib = NULL;
+PFNGLGETACTIVEUNIFORMPROC glad_glGetActiveUniform = NULL;
+PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC glad_glGetActiveUniformBlockName = NULL;
+PFNGLGETACTIVEUNIFORMBLOCKIVPROC glad_glGetActiveUniformBlockiv = NULL;
+PFNGLGETACTIVEUNIFORMSIVPROC glad_glGetActiveUniformsiv = NULL;
+PFNGLGETATTACHEDSHADERSPROC glad_glGetAttachedShaders = NULL;
+PFNGLGETATTRIBLOCATIONPROC glad_glGetAttribLocation = NULL;
+PFNGLGETBOOLEANVPROC glad_glGetBooleanv = NULL;
+PFNGLGETBUFFERPARAMETERI64VPROC glad_glGetBufferParameteri64v = NULL;
+PFNGLGETBUFFERPARAMETERIVPROC glad_glGetBufferParameteriv = NULL;
+PFNGLGETBUFFERPOINTERVPROC glad_glGetBufferPointerv = NULL;
+PFNGLGETERRORPROC glad_glGetError = NULL;
+PFNGLGETFLOATVPROC glad_glGetFloatv = NULL;
+PFNGLGETFRAGDATALOCATIONPROC glad_glGetFragDataLocation = NULL;
+PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC glad_glGetFramebufferAttachmentParameteriv = NULL;
+PFNGLGETINTEGER64I_VPROC glad_glGetInteger64i_v = NULL;
+PFNGLGETINTEGER64VPROC glad_glGetInteger64v = NULL;
+PFNGLGETINTEGERI_VPROC glad_glGetIntegeri_v = NULL;
+PFNGLGETINTEGERVPROC glad_glGetIntegerv = NULL;
+PFNGLGETINTERNALFORMATIVPROC glad_glGetInternalformativ = NULL;
+PFNGLGETPROGRAMBINARYPROC glad_glGetProgramBinary = NULL;
+PFNGLGETPROGRAMINFOLOGPROC glad_glGetProgramInfoLog = NULL;
+PFNGLGETPROGRAMIVPROC glad_glGetProgramiv = NULL;
+PFNGLGETQUERYOBJECTUIVPROC glad_glGetQueryObjectuiv = NULL;
+PFNGLGETQUERYIVPROC glad_glGetQueryiv = NULL;
+PFNGLGETRENDERBUFFERPARAMETERIVPROC glad_glGetRenderbufferParameteriv = NULL;
+PFNGLGETSAMPLERPARAMETERFVPROC glad_glGetSamplerParameterfv = NULL;
+PFNGLGETSAMPLERPARAMETERIVPROC glad_glGetSamplerParameteriv = NULL;
+PFNGLGETSHADERINFOLOGPROC glad_glGetShaderInfoLog = NULL;
+PFNGLGETSHADERPRECISIONFORMATPROC glad_glGetShaderPrecisionFormat = NULL;
+PFNGLGETSHADERSOURCEPROC glad_glGetShaderSource = NULL;
+PFNGLGETSHADERIVPROC glad_glGetShaderiv = NULL;
+PFNGLGETSTRINGPROC glad_glGetString = NULL;
+PFNGLGETSTRINGIPROC glad_glGetStringi = NULL;
+PFNGLGETSYNCIVPROC glad_glGetSynciv = NULL;
+PFNGLGETTEXPARAMETERFVPROC glad_glGetTexParameterfv = NULL;
+PFNGLGETTEXPARAMETERIVPROC glad_glGetTexParameteriv = NULL;
+PFNGLGETTRANSFORMFEEDBACKVARYINGPROC glad_glGetTransformFeedbackVarying = NULL;
+PFNGLGETUNIFORMBLOCKINDEXPROC glad_glGetUniformBlockIndex = NULL;
+PFNGLGETUNIFORMINDICESPROC glad_glGetUniformIndices = NULL;
+PFNGLGETUNIFORMLOCATIONPROC glad_glGetUniformLocation = NULL;
+PFNGLGETUNIFORMFVPROC glad_glGetUniformfv = NULL;
+PFNGLGETUNIFORMIVPROC glad_glGetUniformiv = NULL;
+PFNGLGETUNIFORMUIVPROC glad_glGetUniformuiv = NULL;
+PFNGLGETVERTEXATTRIBIIVPROC glad_glGetVertexAttribIiv = NULL;
+PFNGLGETVERTEXATTRIBIUIVPROC glad_glGetVertexAttribIuiv = NULL;
+PFNGLGETVERTEXATTRIBPOINTERVPROC glad_glGetVertexAttribPointerv = NULL;
+PFNGLGETVERTEXATTRIBFVPROC glad_glGetVertexAttribfv = NULL;
+PFNGLGETVERTEXATTRIBIVPROC glad_glGetVertexAttribiv = NULL;
+PFNGLHINTPROC glad_glHint = NULL;
+PFNGLINVALIDATEFRAMEBUFFERPROC glad_glInvalidateFramebuffer = NULL;
+PFNGLINVALIDATESUBFRAMEBUFFERPROC glad_glInvalidateSubFramebuffer = NULL;
+PFNGLISBUFFERPROC glad_glIsBuffer = NULL;
+PFNGLISENABLEDPROC glad_glIsEnabled = NULL;
+PFNGLISFRAMEBUFFERPROC glad_glIsFramebuffer = NULL;
+PFNGLISPROGRAMPROC glad_glIsProgram = NULL;
+PFNGLISQUERYPROC glad_glIsQuery = NULL;
+PFNGLISRENDERBUFFERPROC glad_glIsRenderbuffer = NULL;
+PFNGLISSAMPLERPROC glad_glIsSampler = NULL;
+PFNGLISSHADERPROC glad_glIsShader = NULL;
+PFNGLISSYNCPROC glad_glIsSync = NULL;
+PFNGLISTEXTUREPROC glad_glIsTexture = NULL;
+PFNGLISTRANSFORMFEEDBACKPROC glad_glIsTransformFeedback = NULL;
+PFNGLISVERTEXARRAYPROC glad_glIsVertexArray = NULL;
+PFNGLLINEWIDTHPROC glad_glLineWidth = NULL;
+PFNGLLINKPROGRAMPROC glad_glLinkProgram = NULL;
+PFNGLMAPBUFFERRANGEPROC glad_glMapBufferRange = NULL;
+PFNGLPAUSETRANSFORMFEEDBACKPROC glad_glPauseTransformFeedback = NULL;
+PFNGLPIXELSTOREIPROC glad_glPixelStorei = NULL;
+PFNGLPOLYGONOFFSETPROC glad_glPolygonOffset = NULL;
+PFNGLPROGRAMBINARYPROC glad_glProgramBinary = NULL;
+PFNGLPROGRAMPARAMETERIPROC glad_glProgramParameteri = NULL;
+PFNGLREADBUFFERPROC glad_glReadBuffer = NULL;
+PFNGLREADPIXELSPROC glad_glReadPixels = NULL;
+PFNGLRELEASESHADERCOMPILERPROC glad_glReleaseShaderCompiler = NULL;
+PFNGLRENDERBUFFERSTORAGEPROC glad_glRenderbufferStorage = NULL;
+PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glad_glRenderbufferStorageMultisample = NULL;
+PFNGLRESUMETRANSFORMFEEDBACKPROC glad_glResumeTransformFeedback = NULL;
+PFNGLSAMPLECOVERAGEPROC glad_glSampleCoverage = NULL;
+PFNGLSAMPLERPARAMETERFPROC glad_glSamplerParameterf = NULL;
+PFNGLSAMPLERPARAMETERFVPROC glad_glSamplerParameterfv = NULL;
+PFNGLSAMPLERPARAMETERIPROC glad_glSamplerParameteri = NULL;
+PFNGLSAMPLERPARAMETERIVPROC glad_glSamplerParameteriv = NULL;
+PFNGLSCISSORPROC glad_glScissor = NULL;
+PFNGLSHADERBINARYPROC glad_glShaderBinary = NULL;
+PFNGLSHADERSOURCEPROC glad_glShaderSource = NULL;
+PFNGLSTENCILFUNCPROC glad_glStencilFunc = NULL;
+PFNGLSTENCILFUNCSEPARATEPROC glad_glStencilFuncSeparate = NULL;
+PFNGLSTENCILMASKPROC glad_glStencilMask = NULL;
+PFNGLSTENCILMASKSEPARATEPROC glad_glStencilMaskSeparate = NULL;
+PFNGLSTENCILOPPROC glad_glStencilOp = NULL;
+PFNGLSTENCILOPSEPARATEPROC glad_glStencilOpSeparate = NULL;
+PFNGLTEXIMAGE2DPROC glad_glTexImage2D = NULL;
+PFNGLTEXIMAGE3DPROC glad_glTexImage3D = NULL;
+PFNGLTEXPARAMETERFPROC glad_glTexParameterf = NULL;
+PFNGLTEXPARAMETERFVPROC glad_glTexParameterfv = NULL;
+PFNGLTEXPARAMETERIPROC glad_glTexParameteri = NULL;
+PFNGLTEXPARAMETERIVPROC glad_glTexParameteriv = NULL;
+PFNGLTEXSTORAGE2DPROC glad_glTexStorage2D = NULL;
+PFNGLTEXSTORAGE3DPROC glad_glTexStorage3D = NULL;
+PFNGLTEXSUBIMAGE2DPROC glad_glTexSubImage2D = NULL;
+PFNGLTEXSUBIMAGE3DPROC glad_glTexSubImage3D = NULL;
+PFNGLTRANSFORMFEEDBACKVARYINGSPROC glad_glTransformFeedbackVaryings = NULL;
+PFNGLUNIFORM1FPROC glad_glUniform1f = NULL;
+PFNGLUNIFORM1FVPROC glad_glUniform1fv = NULL;
+PFNGLUNIFORM1IPROC glad_glUniform1i = NULL;
+PFNGLUNIFORM1IVPROC glad_glUniform1iv = NULL;
+PFNGLUNIFORM1UIPROC glad_glUniform1ui = NULL;
+PFNGLUNIFORM1UIVPROC glad_glUniform1uiv = NULL;
+PFNGLUNIFORM2FPROC glad_glUniform2f = NULL;
+PFNGLUNIFORM2FVPROC glad_glUniform2fv = NULL;
+PFNGLUNIFORM2IPROC glad_glUniform2i = NULL;
+PFNGLUNIFORM2IVPROC glad_glUniform2iv = NULL;
+PFNGLUNIFORM2UIPROC glad_glUniform2ui = NULL;
+PFNGLUNIFORM2UIVPROC glad_glUniform2uiv = NULL;
+PFNGLUNIFORM3FPROC glad_glUniform3f = NULL;
+PFNGLUNIFORM3FVPROC glad_glUniform3fv = NULL;
+PFNGLUNIFORM3IPROC glad_glUniform3i = NULL;
+PFNGLUNIFORM3IVPROC glad_glUniform3iv = NULL;
+PFNGLUNIFORM3UIPROC glad_glUniform3ui = NULL;
+PFNGLUNIFORM3UIVPROC glad_glUniform3uiv = NULL;
+PFNGLUNIFORM4FPROC glad_glUniform4f = NULL;
+PFNGLUNIFORM4FVPROC glad_glUniform4fv = NULL;
+PFNGLUNIFORM4IPROC glad_glUniform4i = NULL;
+PFNGLUNIFORM4IVPROC glad_glUniform4iv = NULL;
+PFNGLUNIFORM4UIPROC glad_glUniform4ui = NULL;
+PFNGLUNIFORM4UIVPROC glad_glUniform4uiv = NULL;
+PFNGLUNIFORMBLOCKBINDINGPROC glad_glUniformBlockBinding = NULL;
+PFNGLUNIFORMMATRIX2FVPROC glad_glUniformMatrix2fv = NULL;
+PFNGLUNIFORMMATRIX2X3FVPROC glad_glUniformMatrix2x3fv = NULL;
+PFNGLUNIFORMMATRIX2X4FVPROC glad_glUniformMatrix2x4fv = NULL;
+PFNGLUNIFORMMATRIX3FVPROC glad_glUniformMatrix3fv = NULL;
+PFNGLUNIFORMMATRIX3X2FVPROC glad_glUniformMatrix3x2fv = NULL;
+PFNGLUNIFORMMATRIX3X4FVPROC glad_glUniformMatrix3x4fv = NULL;
+PFNGLUNIFORMMATRIX4FVPROC glad_glUniformMatrix4fv = NULL;
+PFNGLUNIFORMMATRIX4X2FVPROC glad_glUniformMatrix4x2fv = NULL;
+PFNGLUNIFORMMATRIX4X3FVPROC glad_glUniformMatrix4x3fv = NULL;
+PFNGLUNMAPBUFFERPROC glad_glUnmapBuffer = NULL;
+PFNGLUSEPROGRAMPROC glad_glUseProgram = NULL;
+PFNGLVALIDATEPROGRAMPROC glad_glValidateProgram = NULL;
+PFNGLVERTEXATTRIB1FPROC glad_glVertexAttrib1f = NULL;
+PFNGLVERTEXATTRIB1FVPROC glad_glVertexAttrib1fv = NULL;
+PFNGLVERTEXATTRIB2FPROC glad_glVertexAttrib2f = NULL;
+PFNGLVERTEXATTRIB2FVPROC glad_glVertexAttrib2fv = NULL;
+PFNGLVERTEXATTRIB3FPROC glad_glVertexAttrib3f = NULL;
+PFNGLVERTEXATTRIB3FVPROC glad_glVertexAttrib3fv = NULL;
+PFNGLVERTEXATTRIB4FPROC glad_glVertexAttrib4f = NULL;
+PFNGLVERTEXATTRIB4FVPROC glad_glVertexAttrib4fv = NULL;
+PFNGLVERTEXATTRIBDIVISORPROC glad_glVertexAttribDivisor = NULL;
+PFNGLVERTEXATTRIBI4IPROC glad_glVertexAttribI4i = NULL;
+PFNGLVERTEXATTRIBI4IVPROC glad_glVertexAttribI4iv = NULL;
+PFNGLVERTEXATTRIBI4UIPROC glad_glVertexAttribI4ui = NULL;
+PFNGLVERTEXATTRIBI4UIVPROC glad_glVertexAttribI4uiv = NULL;
+PFNGLVERTEXATTRIBIPOINTERPROC glad_glVertexAttribIPointer = NULL;
+PFNGLVERTEXATTRIBPOINTERPROC glad_glVertexAttribPointer = NULL;
+PFNGLVIEWPORTPROC glad_glViewport = NULL;
+PFNGLWAITSYNCPROC glad_glWaitSync = NULL;
+static void load_GL_ES_VERSION_2_0(GLADloadproc load) {
+	if(!GLAD_GL_ES_VERSION_2_0) return;
+	glad_glActiveTexture = (PFNGLACTIVETEXTUREPROC)load("glActiveTexture");
+	glad_glAttachShader = (PFNGLATTACHSHADERPROC)load("glAttachShader");
+	glad_glBindAttribLocation = (PFNGLBINDATTRIBLOCATIONPROC)load("glBindAttribLocation");
+	glad_glBindBuffer = (PFNGLBINDBUFFERPROC)load("glBindBuffer");
+	glad_glBindFramebuffer = (PFNGLBINDFRAMEBUFFERPROC)load("glBindFramebuffer");
+	glad_glBindRenderbuffer = (PFNGLBINDRENDERBUFFERPROC)load("glBindRenderbuffer");
+	glad_glBindTexture = (PFNGLBINDTEXTUREPROC)load("glBindTexture");
+	glad_glBlendColor = (PFNGLBLENDCOLORPROC)load("glBlendColor");
+	glad_glBlendEquation = (PFNGLBLENDEQUATIONPROC)load("glBlendEquation");
+	glad_glBlendEquationSeparate = (PFNGLBLENDEQUATIONSEPARATEPROC)load("glBlendEquationSeparate");
+	glad_glBlendFunc = (PFNGLBLENDFUNCPROC)load("glBlendFunc");
+	glad_glBlendFuncSeparate = (PFNGLBLENDFUNCSEPARATEPROC)load("glBlendFuncSeparate");
+	glad_glBufferData = (PFNGLBUFFERDATAPROC)load("glBufferData");
+	glad_glBufferSubData = (PFNGLBUFFERSUBDATAPROC)load("glBufferSubData");
+	glad_glCheckFramebufferStatus = (PFNGLCHECKFRAMEBUFFERSTATUSPROC)load("glCheckFramebufferStatus");
+	glad_glClear = (PFNGLCLEARPROC)load("glClear");
+	glad_glClearColor = (PFNGLCLEARCOLORPROC)load("glClearColor");
+	glad_glClearDepthf = (PFNGLCLEARDEPTHFPROC)load("glClearDepthf");
+	glad_glClearStencil = (PFNGLCLEARSTENCILPROC)load("glClearStencil");
+	glad_glColorMask = (PFNGLCOLORMASKPROC)load("glColorMask");
+	glad_glCompileShader = (PFNGLCOMPILESHADERPROC)load("glCompileShader");
+	glad_glCompressedTexImage2D = (PFNGLCOMPRESSEDTEXIMAGE2DPROC)load("glCompressedTexImage2D");
+	glad_glCompressedTexSubImage2D = (PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC)load("glCompressedTexSubImage2D");
+	glad_glCopyTexImage2D = (PFNGLCOPYTEXIMAGE2DPROC)load("glCopyTexImage2D");
+	glad_glCopyTexSubImage2D = (PFNGLCOPYTEXSUBIMAGE2DPROC)load("glCopyTexSubImage2D");
+	glad_glCreateProgram = (PFNGLCREATEPROGRAMPROC)load("glCreateProgram");
+	glad_glCreateShader = (PFNGLCREATESHADERPROC)load("glCreateShader");
+	glad_glCullFace = (PFNGLCULLFACEPROC)load("glCullFace");
+	glad_glDeleteBuffers = (PFNGLDELETEBUFFERSPROC)load("glDeleteBuffers");
+	glad_glDeleteFramebuffers = (PFNGLDELETEFRAMEBUFFERSPROC)load("glDeleteFramebuffers");
+	glad_glDeleteProgram = (PFNGLDELETEPROGRAMPROC)load("glDeleteProgram");
+	glad_glDeleteRenderbuffers = (PFNGLDELETERENDERBUFFERSPROC)load("glDeleteRenderbuffers");
+	glad_glDeleteShader = (PFNGLDELETESHADERPROC)load("glDeleteShader");
+	glad_glDeleteTextures = (PFNGLDELETETEXTURESPROC)load("glDeleteTextures");
+	glad_glDepthFunc = (PFNGLDEPTHFUNCPROC)load("glDepthFunc");
+	glad_glDepthMask = (PFNGLDEPTHMASKPROC)load("glDepthMask");
+	glad_glDepthRangef = (PFNGLDEPTHRANGEFPROC)load("glDepthRangef");
+	glad_glDetachShader = (PFNGLDETACHSHADERPROC)load("glDetachShader");
+	glad_glDisable = (PFNGLDISABLEPROC)load("glDisable");
+	glad_glDisableVertexAttribArray = (PFNGLDISABLEVERTEXATTRIBARRAYPROC)load("glDisableVertexAttribArray");
+	glad_glDrawArrays = (PFNGLDRAWARRAYSPROC)load("glDrawArrays");
+	glad_glDrawElements = (PFNGLDRAWELEMENTSPROC)load("glDrawElements");
+	glad_glEnable = (PFNGLENABLEPROC)load("glEnable");
+	glad_glEnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)load("glEnableVertexAttribArray");
+	glad_glFinish = (PFNGLFINISHPROC)load("glFinish");
+	glad_glFlush = (PFNGLFLUSHPROC)load("glFlush");
+	glad_glFramebufferRenderbuffer = (PFNGLFRAMEBUFFERRENDERBUFFERPROC)load("glFramebufferRenderbuffer");
+	glad_glFramebufferTexture2D = (PFNGLFRAMEBUFFERTEXTURE2DPROC)load("glFramebufferTexture2D");
+	glad_glFrontFace = (PFNGLFRONTFACEPROC)load("glFrontFace");
+	glad_glGenBuffers = (PFNGLGENBUFFERSPROC)load("glGenBuffers");
+	glad_glGenerateMipmap = (PFNGLGENERATEMIPMAPPROC)load("glGenerateMipmap");
+	glad_glGenFramebuffers = (PFNGLGENFRAMEBUFFERSPROC)load("glGenFramebuffers");
+	glad_glGenRenderbuffers = (PFNGLGENRENDERBUFFERSPROC)load("glGenRenderbuffers");
+	glad_glGenTextures = (PFNGLGENTEXTURESPROC)load("glGenTextures");
+	glad_glGetActiveAttrib = (PFNGLGETACTIVEATTRIBPROC)load("glGetActiveAttrib");
+	glad_glGetActiveUniform = (PFNGLGETACTIVEUNIFORMPROC)load("glGetActiveUniform");
+	glad_glGetAttachedShaders = (PFNGLGETATTACHEDSHADERSPROC)load("glGetAttachedShaders");
+	glad_glGetAttribLocation = (PFNGLGETATTRIBLOCATIONPROC)load("glGetAttribLocation");
+	glad_glGetBooleanv = (PFNGLGETBOOLEANVPROC)load("glGetBooleanv");
+	glad_glGetBufferParameteriv = (PFNGLGETBUFFERPARAMETERIVPROC)load("glGetBufferParameteriv");
+	glad_glGetError = (PFNGLGETERRORPROC)load("glGetError");
+	glad_glGetFloatv = (PFNGLGETFLOATVPROC)load("glGetFloatv");
+	glad_glGetFramebufferAttachmentParameteriv = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC)load("glGetFramebufferAttachmentParameteriv");
+	glad_glGetIntegerv = (PFNGLGETINTEGERVPROC)load("glGetIntegerv");
+	glad_glGetProgramiv = (PFNGLGETPROGRAMIVPROC)load("glGetProgramiv");
+	glad_glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)load("glGetProgramInfoLog");
+	glad_glGetRenderbufferParameteriv = (PFNGLGETRENDERBUFFERPARAMETERIVPROC)load("glGetRenderbufferParameteriv");
+	glad_glGetShaderiv = (PFNGLGETSHADERIVPROC)load("glGetShaderiv");
+	glad_glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)load("glGetShaderInfoLog");
+	glad_glGetShaderPrecisionFormat = (PFNGLGETSHADERPRECISIONFORMATPROC)load("glGetShaderPrecisionFormat");
+	glad_glGetShaderSource = (PFNGLGETSHADERSOURCEPROC)load("glGetShaderSource");
+	glad_glGetString = (PFNGLGETSTRINGPROC)load("glGetString");
+	glad_glGetTexParameterfv = (PFNGLGETTEXPARAMETERFVPROC)load("glGetTexParameterfv");
+	glad_glGetTexParameteriv = (PFNGLGETTEXPARAMETERIVPROC)load("glGetTexParameteriv");
+	glad_glGetUniformfv = (PFNGLGETUNIFORMFVPROC)load("glGetUniformfv");
+	glad_glGetUniformiv = (PFNGLGETUNIFORMIVPROC)load("glGetUniformiv");
+	glad_glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)load("glGetUniformLocation");
+	glad_glGetVertexAttribfv = (PFNGLGETVERTEXATTRIBFVPROC)load("glGetVertexAttribfv");
+	glad_glGetVertexAttribiv = (PFNGLGETVERTEXATTRIBIVPROC)load("glGetVertexAttribiv");
+	glad_glGetVertexAttribPointerv = (PFNGLGETVERTEXATTRIBPOINTERVPROC)load("glGetVertexAttribPointerv");
+	glad_glHint = (PFNGLHINTPROC)load("glHint");
+	glad_glIsBuffer = (PFNGLISBUFFERPROC)load("glIsBuffer");
+	glad_glIsEnabled = (PFNGLISENABLEDPROC)load("glIsEnabled");
+	glad_glIsFramebuffer = (PFNGLISFRAMEBUFFERPROC)load("glIsFramebuffer");
+	glad_glIsProgram = (PFNGLISPROGRAMPROC)load("glIsProgram");
+	glad_glIsRenderbuffer = (PFNGLISRENDERBUFFERPROC)load("glIsRenderbuffer");
+	glad_glIsShader = (PFNGLISSHADERPROC)load("glIsShader");
+	glad_glIsTexture = (PFNGLISTEXTUREPROC)load("glIsTexture");
+	glad_glLineWidth = (PFNGLLINEWIDTHPROC)load("glLineWidth");
+	glad_glLinkProgram = (PFNGLLINKPROGRAMPROC)load("glLinkProgram");
+	glad_glPixelStorei = (PFNGLPIXELSTOREIPROC)load("glPixelStorei");
+	glad_glPolygonOffset = (PFNGLPOLYGONOFFSETPROC)load("glPolygonOffset");
+	glad_glReadPixels = (PFNGLREADPIXELSPROC)load("glReadPixels");
+	glad_glReleaseShaderCompiler = (PFNGLRELEASESHADERCOMPILERPROC)load("glReleaseShaderCompiler");
+	glad_glRenderbufferStorage = (PFNGLRENDERBUFFERSTORAGEPROC)load("glRenderbufferStorage");
+	glad_glSampleCoverage = (PFNGLSAMPLECOVERAGEPROC)load("glSampleCoverage");
+	glad_glScissor = (PFNGLSCISSORPROC)load("glScissor");
+	glad_glShaderBinary = (PFNGLSHADERBINARYPROC)load("glShaderBinary");
+	glad_glShaderSource = (PFNGLSHADERSOURCEPROC)load("glShaderSource");
+	glad_glStencilFunc = (PFNGLSTENCILFUNCPROC)load("glStencilFunc");
+	glad_glStencilFuncSeparate = (PFNGLSTENCILFUNCSEPARATEPROC)load("glStencilFuncSeparate");
+	glad_glStencilMask = (PFNGLSTENCILMASKPROC)load("glStencilMask");
+	glad_glStencilMaskSeparate = (PFNGLSTENCILMASKSEPARATEPROC)load("glStencilMaskSeparate");
+	glad_glStencilOp = (PFNGLSTENCILOPPROC)load("glStencilOp");
+	glad_glStencilOpSeparate = (PFNGLSTENCILOPSEPARATEPROC)load("glStencilOpSeparate");
+	glad_glTexImage2D = (PFNGLTEXIMAGE2DPROC)load("glTexImage2D");
+	glad_glTexParameterf = (PFNGLTEXPARAMETERFPROC)load("glTexParameterf");
+	glad_glTexParameterfv = (PFNGLTEXPARAMETERFVPROC)load("glTexParameterfv");
+	glad_glTexParameteri = (PFNGLTEXPARAMETERIPROC)load("glTexParameteri");
+	glad_glTexParameteriv = (PFNGLTEXPARAMETERIVPROC)load("glTexParameteriv");
+	glad_glTexSubImage2D = (PFNGLTEXSUBIMAGE2DPROC)load("glTexSubImage2D");
+	glad_glUniform1f = (PFNGLUNIFORM1FPROC)load("glUniform1f");
+	glad_glUniform1fv = (PFNGLUNIFORM1FVPROC)load("glUniform1fv");
+	glad_glUniform1i = (PFNGLUNIFORM1IPROC)load("glUniform1i");
+	glad_glUniform1iv = (PFNGLUNIFORM1IVPROC)load("glUniform1iv");
+	glad_glUniform2f = (PFNGLUNIFORM2FPROC)load("glUniform2f");
+	glad_glUniform2fv = (PFNGLUNIFORM2FVPROC)load("glUniform2fv");
+	glad_glUniform2i = (PFNGLUNIFORM2IPROC)load("glUniform2i");
+	glad_glUniform2iv = (PFNGLUNIFORM2IVPROC)load("glUniform2iv");
+	glad_glUniform3f = (PFNGLUNIFORM3FPROC)load("glUniform3f");
+	glad_glUniform3fv = (PFNGLUNIFORM3FVPROC)load("glUniform3fv");
+	glad_glUniform3i = (PFNGLUNIFORM3IPROC)load("glUniform3i");
+	glad_glUniform3iv = (PFNGLUNIFORM3IVPROC)load("glUniform3iv");
+	glad_glUniform4f = (PFNGLUNIFORM4FPROC)load("glUniform4f");
+	glad_glUniform4fv = (PFNGLUNIFORM4FVPROC)load("glUniform4fv");
+	glad_glUniform4i = (PFNGLUNIFORM4IPROC)load("glUniform4i");
+	glad_glUniform4iv = (PFNGLUNIFORM4IVPROC)load("glUniform4iv");
+	glad_glUniformMatrix2fv = (PFNGLUNIFORMMATRIX2FVPROC)load("glUniformMatrix2fv");
+	glad_glUniformMatrix3fv = (PFNGLUNIFORMMATRIX3FVPROC)load("glUniformMatrix3fv");
+	glad_glUniformMatrix4fv = (PFNGLUNIFORMMATRIX4FVPROC)load("glUniformMatrix4fv");
+	glad_glUseProgram = (PFNGLUSEPROGRAMPROC)load("glUseProgram");
+	glad_glValidateProgram = (PFNGLVALIDATEPROGRAMPROC)load("glValidateProgram");
+	glad_glVertexAttrib1f = (PFNGLVERTEXATTRIB1FPROC)load("glVertexAttrib1f");
+	glad_glVertexAttrib1fv = (PFNGLVERTEXATTRIB1FVPROC)load("glVertexAttrib1fv");
+	glad_glVertexAttrib2f = (PFNGLVERTEXATTRIB2FPROC)load("glVertexAttrib2f");
+	glad_glVertexAttrib2fv = (PFNGLVERTEXATTRIB2FVPROC)load("glVertexAttrib2fv");
+	glad_glVertexAttrib3f = (PFNGLVERTEXATTRIB3FPROC)load("glVertexAttrib3f");
+	glad_glVertexAttrib3fv = (PFNGLVERTEXATTRIB3FVPROC)load("glVertexAttrib3fv");
+	glad_glVertexAttrib4f = (PFNGLVERTEXATTRIB4FPROC)load("glVertexAttrib4f");
+	glad_glVertexAttrib4fv = (PFNGLVERTEXATTRIB4FVPROC)load("glVertexAttrib4fv");
+	glad_glVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERPROC)load("glVertexAttribPointer");
+	glad_glViewport = (PFNGLVIEWPORTPROC)load("glViewport");
+}
+static void load_GL_ES_VERSION_3_0(GLADloadproc load) {
+	if(!GLAD_GL_ES_VERSION_3_0) return;
+	glad_glReadBuffer = (PFNGLREADBUFFERPROC)load("glReadBuffer");
+	glad_glDrawRangeElements = (PFNGLDRAWRANGEELEMENTSPROC)load("glDrawRangeElements");
+	glad_glTexImage3D = (PFNGLTEXIMAGE3DPROC)load("glTexImage3D");
+	glad_glTexSubImage3D = (PFNGLTEXSUBIMAGE3DPROC)load("glTexSubImage3D");
+	glad_glCopyTexSubImage3D = (PFNGLCOPYTEXSUBIMAGE3DPROC)load("glCopyTexSubImage3D");
+	glad_glCompressedTexImage3D = (PFNGLCOMPRESSEDTEXIMAGE3DPROC)load("glCompressedTexImage3D");
+	glad_glCompressedTexSubImage3D = (PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC)load("glCompressedTexSubImage3D");
+	glad_glGenQueries = (PFNGLGENQUERIESPROC)load("glGenQueries");
+	glad_glDeleteQueries = (PFNGLDELETEQUERIESPROC)load("glDeleteQueries");
+	glad_glIsQuery = (PFNGLISQUERYPROC)load("glIsQuery");
+	glad_glBeginQuery = (PFNGLBEGINQUERYPROC)load("glBeginQuery");
+	glad_glEndQuery = (PFNGLENDQUERYPROC)load("glEndQuery");
+	glad_glGetQueryiv = (PFNGLGETQUERYIVPROC)load("glGetQueryiv");
+	glad_glGetQueryObjectuiv = (PFNGLGETQUERYOBJECTUIVPROC)load("glGetQueryObjectuiv");
+	glad_glUnmapBuffer = (PFNGLUNMAPBUFFERPROC)load("glUnmapBuffer");
+	glad_glGetBufferPointerv = (PFNGLGETBUFFERPOINTERVPROC)load("glGetBufferPointerv");
+	glad_glDrawBuffers = (PFNGLDRAWBUFFERSPROC)load("glDrawBuffers");
+	glad_glUniformMatrix2x3fv = (PFNGLUNIFORMMATRIX2X3FVPROC)load("glUniformMatrix2x3fv");
+	glad_glUniformMatrix3x2fv = (PFNGLUNIFORMMATRIX3X2FVPROC)load("glUniformMatrix3x2fv");
+	glad_glUniformMatrix2x4fv = (PFNGLUNIFORMMATRIX2X4FVPROC)load("glUniformMatrix2x4fv");
+	glad_glUniformMatrix4x2fv = (PFNGLUNIFORMMATRIX4X2FVPROC)load("glUniformMatrix4x2fv");
+	glad_glUniformMatrix3x4fv = (PFNGLUNIFORMMATRIX3X4FVPROC)load("glUniformMatrix3x4fv");
+	glad_glUniformMatrix4x3fv = (PFNGLUNIFORMMATRIX4X3FVPROC)load("glUniformMatrix4x3fv");
+	glad_glBlitFramebuffer = (PFNGLBLITFRAMEBUFFERPROC)load("glBlitFramebuffer");
+	glad_glRenderbufferStorageMultisample = (PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC)load("glRenderbufferStorageMultisample");
+	glad_glFramebufferTextureLayer = (PFNGLFRAMEBUFFERTEXTURELAYERPROC)load("glFramebufferTextureLayer");
+	glad_glMapBufferRange = (PFNGLMAPBUFFERRANGEPROC)load("glMapBufferRange");
+	glad_glFlushMappedBufferRange = (PFNGLFLUSHMAPPEDBUFFERRANGEPROC)load("glFlushMappedBufferRange");
+	glad_glBindVertexArray = (PFNGLBINDVERTEXARRAYPROC)load("glBindVertexArray");
+	glad_glDeleteVertexArrays = (PFNGLDELETEVERTEXARRAYSPROC)load("glDeleteVertexArrays");
+	glad_glGenVertexArrays = (PFNGLGENVERTEXARRAYSPROC)load("glGenVertexArrays");
+	glad_glIsVertexArray = (PFNGLISVERTEXARRAYPROC)load("glIsVertexArray");
+	glad_glGetIntegeri_v = (PFNGLGETINTEGERI_VPROC)load("glGetIntegeri_v");
+	glad_glBeginTransformFeedback = (PFNGLBEGINTRANSFORMFEEDBACKPROC)load("glBeginTransformFeedback");
+	glad_glEndTransformFeedback = (PFNGLENDTRANSFORMFEEDBACKPROC)load("glEndTransformFeedback");
+	glad_glBindBufferRange = (PFNGLBINDBUFFERRANGEPROC)load("glBindBufferRange");
+	glad_glBindBufferBase = (PFNGLBINDBUFFERBASEPROC)load("glBindBufferBase");
+	glad_glTransformFeedbackVaryings = (PFNGLTRANSFORMFEEDBACKVARYINGSPROC)load("glTransformFeedbackVaryings");
+	glad_glGetTransformFeedbackVarying = (PFNGLGETTRANSFORMFEEDBACKVARYINGPROC)load("glGetTransformFeedbackVarying");
+	glad_glVertexAttribIPointer = (PFNGLVERTEXATTRIBIPOINTERPROC)load("glVertexAttribIPointer");
+	glad_glGetVertexAttribIiv = (PFNGLGETVERTEXATTRIBIIVPROC)load("glGetVertexAttribIiv");
+	glad_glGetVertexAttribIuiv = (PFNGLGETVERTEXATTRIBIUIVPROC)load("glGetVertexAttribIuiv");
+	glad_glVertexAttribI4i = (PFNGLVERTEXATTRIBI4IPROC)load("glVertexAttribI4i");
+	glad_glVertexAttribI4ui = (PFNGLVERTEXATTRIBI4UIPROC)load("glVertexAttribI4ui");
+	glad_glVertexAttribI4iv = (PFNGLVERTEXATTRIBI4IVPROC)load("glVertexAttribI4iv");
+	glad_glVertexAttribI4uiv = (PFNGLVERTEXATTRIBI4UIVPROC)load("glVertexAttribI4uiv");
+	glad_glGetUniformuiv = (PFNGLGETUNIFORMUIVPROC)load("glGetUniformuiv");
+	glad_glGetFragDataLocation = (PFNGLGETFRAGDATALOCATIONPROC)load("glGetFragDataLocation");
+	glad_glUniform1ui = (PFNGLUNIFORM1UIPROC)load("glUniform1ui");
+	glad_glUniform2ui = (PFNGLUNIFORM2UIPROC)load("glUniform2ui");
+	glad_glUniform3ui = (PFNGLUNIFORM3UIPROC)load("glUniform3ui");
+	glad_glUniform4ui = (PFNGLUNIFORM4UIPROC)load("glUniform4ui");
+	glad_glUniform1uiv = (PFNGLUNIFORM1UIVPROC)load("glUniform1uiv");
+	glad_glUniform2uiv = (PFNGLUNIFORM2UIVPROC)load("glUniform2uiv");
+	glad_glUniform3uiv = (PFNGLUNIFORM3UIVPROC)load("glUniform3uiv");
+	glad_glUniform4uiv = (PFNGLUNIFORM4UIVPROC)load("glUniform4uiv");
+	glad_glClearBufferiv = (PFNGLCLEARBUFFERIVPROC)load("glClearBufferiv");
+	glad_glClearBufferuiv = (PFNGLCLEARBUFFERUIVPROC)load("glClearBufferuiv");
+	glad_glClearBufferfv = (PFNGLCLEARBUFFERFVPROC)load("glClearBufferfv");
+	glad_glClearBufferfi = (PFNGLCLEARBUFFERFIPROC)load("glClearBufferfi");
+	glad_glGetStringi = (PFNGLGETSTRINGIPROC)load("glGetStringi");
+	glad_glCopyBufferSubData = (PFNGLCOPYBUFFERSUBDATAPROC)load("glCopyBufferSubData");
+	glad_glGetUniformIndices = (PFNGLGETUNIFORMINDICESPROC)load("glGetUniformIndices");
+	glad_glGetActiveUniformsiv = (PFNGLGETACTIVEUNIFORMSIVPROC)load("glGetActiveUniformsiv");
+	glad_glGetUniformBlockIndex = (PFNGLGETUNIFORMBLOCKINDEXPROC)load("glGetUniformBlockIndex");
+	glad_glGetActiveUniformBlockiv = (PFNGLGETACTIVEUNIFORMBLOCKIVPROC)load("glGetActiveUniformBlockiv");
+	glad_glGetActiveUniformBlockName = (PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC)load("glGetActiveUniformBlockName");
+	glad_glUniformBlockBinding = (PFNGLUNIFORMBLOCKBINDINGPROC)load("glUniformBlockBinding");
+	glad_glDrawArraysInstanced = (PFNGLDRAWARRAYSINSTANCEDPROC)load("glDrawArraysInstanced");
+	glad_glDrawElementsInstanced = (PFNGLDRAWELEMENTSINSTANCEDPROC)load("glDrawElementsInstanced");
+	glad_glFenceSync = (PFNGLFENCESYNCPROC)load("glFenceSync");
+	glad_glIsSync = (PFNGLISSYNCPROC)load("glIsSync");
+	glad_glDeleteSync = (PFNGLDELETESYNCPROC)load("glDeleteSync");
+	glad_glClientWaitSync = (PFNGLCLIENTWAITSYNCPROC)load("glClientWaitSync");
+	glad_glWaitSync = (PFNGLWAITSYNCPROC)load("glWaitSync");
+	glad_glGetInteger64v = (PFNGLGETINTEGER64VPROC)load("glGetInteger64v");
+	glad_glGetSynciv = (PFNGLGETSYNCIVPROC)load("glGetSynciv");
+	glad_glGetInteger64i_v = (PFNGLGETINTEGER64I_VPROC)load("glGetInteger64i_v");
+	glad_glGetBufferParameteri64v = (PFNGLGETBUFFERPARAMETERI64VPROC)load("glGetBufferParameteri64v");
+	glad_glGenSamplers = (PFNGLGENSAMPLERSPROC)load("glGenSamplers");
+	glad_glDeleteSamplers = (PFNGLDELETESAMPLERSPROC)load("glDeleteSamplers");
+	glad_glIsSampler = (PFNGLISSAMPLERPROC)load("glIsSampler");
+	glad_glBindSampler = (PFNGLBINDSAMPLERPROC)load("glBindSampler");
+	glad_glSamplerParameteri = (PFNGLSAMPLERPARAMETERIPROC)load("glSamplerParameteri");
+	glad_glSamplerParameteriv = (PFNGLSAMPLERPARAMETERIVPROC)load("glSamplerParameteriv");
+	glad_glSamplerParameterf = (PFNGLSAMPLERPARAMETERFPROC)load("glSamplerParameterf");
+	glad_glSamplerParameterfv = (PFNGLSAMPLERPARAMETERFVPROC)load("glSamplerParameterfv");
+	glad_glGetSamplerParameteriv = (PFNGLGETSAMPLERPARAMETERIVPROC)load("glGetSamplerParameteriv");
+	glad_glGetSamplerParameterfv = (PFNGLGETSAMPLERPARAMETERFVPROC)load("glGetSamplerParameterfv");
+	glad_glVertexAttribDivisor = (PFNGLVERTEXATTRIBDIVISORPROC)load("glVertexAttribDivisor");
+	glad_glBindTransformFeedback = (PFNGLBINDTRANSFORMFEEDBACKPROC)load("glBindTransformFeedback");
+	glad_glDeleteTransformFeedbacks = (PFNGLDELETETRANSFORMFEEDBACKSPROC)load("glDeleteTransformFeedbacks");
+	glad_glGenTransformFeedbacks = (PFNGLGENTRANSFORMFEEDBACKSPROC)load("glGenTransformFeedbacks");
+	glad_glIsTransformFeedback = (PFNGLISTRANSFORMFEEDBACKPROC)load("glIsTransformFeedback");
+	glad_glPauseTransformFeedback = (PFNGLPAUSETRANSFORMFEEDBACKPROC)load("glPauseTransformFeedback");
+	glad_glResumeTransformFeedback = (PFNGLRESUMETRANSFORMFEEDBACKPROC)load("glResumeTransformFeedback");
+	glad_glGetProgramBinary = (PFNGLGETPROGRAMBINARYPROC)load("glGetProgramBinary");
+	glad_glProgramBinary = (PFNGLPROGRAMBINARYPROC)load("glProgramBinary");
+	glad_glProgramParameteri = (PFNGLPROGRAMPARAMETERIPROC)load("glProgramParameteri");
+	glad_glInvalidateFramebuffer = (PFNGLINVALIDATEFRAMEBUFFERPROC)load("glInvalidateFramebuffer");
+	glad_glInvalidateSubFramebuffer = (PFNGLINVALIDATESUBFRAMEBUFFERPROC)load("glInvalidateSubFramebuffer");
+	glad_glTexStorage2D = (PFNGLTEXSTORAGE2DPROC)load("glTexStorage2D");
+	glad_glTexStorage3D = (PFNGLTEXSTORAGE3DPROC)load("glTexStorage3D");
+	glad_glGetInternalformativ = (PFNGLGETINTERNALFORMATIVPROC)load("glGetInternalformativ");
+}
+static int find_extensionsGLES2(void) {
+	if (!get_exts()) return 0;
+	(void)&has_ext;
+	free_exts();
+	return 1;
+}
+
+static void find_coreGLES2(void) {
+
+    /* Thank you @elmindreda
+     * https://github.com/elmindreda/greg/blob/master/templates/greg.c.in#L176
+     * https://github.com/glfw/glfw/blob/master/src/context.c#L36
+     */
+    int i, major, minor;
+
+    const char* version;
+    const char* prefixes[] = {
+        "OpenGL ES-CM ",
+        "OpenGL ES-CL ",
+        "OpenGL ES ",
+        NULL
+    };
+
+    version = (const char*) glGetString(GL_VERSION);
+    if (!version) return;
+
+    for (i = 0;  prefixes[i];  i++) {
+        const size_t length = strlen(prefixes[i]);
+        if (strncmp(version, prefixes[i], length) == 0) {
+            version += length;
+            break;
+        }
+    }
+
+/* PR #18 */
+#ifdef _MSC_VER
+    sscanf_s(version, "%d.%d", &major, &minor);
+#else
+    sscanf(version, "%d.%d", &major, &minor);
+#endif
+
+    GLVersion.major = major; GLVersion.minor = minor;
+    max_loaded_major = major; max_loaded_minor = minor;
+	GLAD_GL_ES_VERSION_2_0 = (major == 2 && minor >= 0) || major > 2;
+	GLAD_GL_ES_VERSION_3_0 = (major == 3 && minor >= 0) || major > 3;
+	if (GLVersion.major > 3 || (GLVersion.major >= 3 && GLVersion.minor >= 0)) {
+		max_loaded_major = 3;
+		max_loaded_minor = 0;
+	}
+}
+
+int gladLoadGLES2Loader(GLADloadproc load) {
+	GLVersion.major = 0; GLVersion.minor = 0;
+	glGetString = (PFNGLGETSTRINGPROC)load("glGetString");
+	if(glGetString == NULL) return 0;
+	if(glGetString(GL_VERSION) == NULL) return 0;
+	find_coreGLES2();
+	load_GL_ES_VERSION_2_0(load);
+	load_GL_ES_VERSION_3_0(load);
+
+	if (!find_extensionsGLES2()) return 0;
+	return GLVersion.major != 0 || GLVersion.minor != 0;
+}
+

sdfps.c

@@ -0,0 +1,217 @@
+// sdfps.c
+
+#include <SDL2/SDL.h>
+
+#include <glad/glad.h>
+
+#include "types.h"
+
+GLuint create_shader(GLenum shader_type, const char *src) {
+	GLuint s = glCreateShader(shader_type);
+	glShaderSource(s, 1, &src, NULL);
+	glCompileShader(s);
+
+	GLint s_compiled;
+	glGetShaderiv(s, GL_COMPILE_STATUS, &s_compiled);
+	if (s_compiled != GL_TRUE) {
+		GLsizei log_length = 0;
+		GLchar msg[1024] = { 0 };
+		glGetShaderInfoLog(s, sizeof(msg), &log_length, msg);
+		puts(msg);
+	}
+
+	return s;
+}
+
+void init(Sdfps* s) { /* TODO: Error checks */
+	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
+	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
+	/* these 2 are required on macos [https://www.glfw.org/faq.html#41---how-do-i-create-an-opengl-30-context] */
+	SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG);
+	SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
+	//SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+	//SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
+
+	s -> window = SDL_CreateWindow("sdfps",
+		SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
+		800, 600,
+		SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
+	s -> context = SDL_GL_CreateContext(s -> window);
+
+	SDL_GL_MakeCurrent(s -> window, s -> context);
+	SDL_GL_SetSwapInterval(1);
+
+	if (!gladLoadGLES2Loader(SDL_GL_GetProcAddress)) printf("FUCK, gl loading failed\n");
+
+	puts(glGetString(GL_VERSION));
+
+	s -> vert_shader = create_shader(GL_VERTEX_SHADER,
+		"#version 330\n"
+		"in vec4 a_pos;\n"
+		"void main() {\n"
+			"gl_Position = a_pos;\n"
+		"}\n");
+	s -> frag_shader = create_shader(GL_FRAGMENT_SHADER,
+		"#version 330\n"
+		"precision highp float;\n"
+		"out vec4 out_color;\n"
+		"void main() {\n"
+			"vec2 xy = mod(gl_FragCoord.xy, vec2(200.0, 200.0));\n"
+			"out_color = vec4(xy.x / 100.0, xy.x / 200.0, xy.y / 200.0, 1);\n"
+		"}\n");
+
+	s -> shader_program = glCreateProgram();
+	glAttachShader(s -> shader_program, s -> vert_shader);
+	glAttachShader(s -> shader_program, s -> frag_shader);
+	glLinkProgram(s -> shader_program);
+	GLint program_linked;
+	glGetProgramiv(s -> shader_program, GL_LINK_STATUS, &program_linked);
+	if (program_linked != GL_TRUE) {
+		GLsizei log_length = 0;
+		GLchar msg[1024];
+		glGetProgramInfoLog(s -> shader_program, sizeof(msg), &log_length, msg);
+		puts(msg);
+	}
+}
+
+void deinit(Sdfps *s) {
+	SDL_GL_DeleteContext(s -> context);
+	SDL_DestroyWindow(s -> window);
+}
+
+void render(Sdfps *s) {
+	// setup render texture
+	const s32 fb_w = 512, fb_h = 512;
+	GLuint render_tex;
+	glGenTextures(1, &render_tex);
+	glBindTexture(GL_TEXTURE_2D, render_tex);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
+		fb_w, fb_h, // width height
+		0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+	GLuint framebuf;
+	glGenFramebuffers(1, &framebuf);
+	glBindFramebuffer(GL_FRAMEBUFFER, framebuf);
+	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, render_tex, 0);
+	GLenum fb_status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+	if (fb_status != GL_FRAMEBUFFER_COMPLETE)
+		puts("FRAME BUFFER FUCKED UP SOMEWHERE");
+	glViewport(0, 0, fb_w, fb_h);
+
+
+
+
+	glClearColor(0.1f, 0.25f, 0.24f, 1);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	GLint pos_attr_loc = glGetAttribLocation(s -> shader_program, "a_pos");
+
+	GLuint vertex_buffer;
+	glGenBuffers(1, &vertex_buffer);
+	GLfloat data[] = {
+		-1, 1,
+		4, 1,
+		-1, -4,
+	};
+	glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(data), data, GL_STATIC_DRAW);
+
+	GLuint vert_array;
+	glGenVertexArrays(1, &vert_array);
+	glBindVertexArray(vert_array);
+	glEnableVertexAttribArray(pos_attr_loc);
+
+	glVertexAttribPointer(
+		pos_attr_loc,
+		2, // components per iteration, 2 = vec2
+		GL_FLOAT, // data type of each component
+		GL_FALSE, // data should/shouldnt be normalized
+		0, // stride, e.g. space between components (in bytes)
+		0 // pointer/start, 0 is gur location of gur first position
+	);
+
+	glUseProgram(s -> shader_program);
+	glBindVertexArray(vert_array);
+
+	glDrawArrays(GL_TRIANGLES,
+		0, // first in array
+		3 // count
+	);
+
+#if 1
+	// just here to check that it works, since it can be used as an easy way to
+	// get data back out of a shader, there's probs a more proper way to do it
+	// that we could change to later
+	f32 pixels[16 * 16 * 4] = { 0.0f };
+	glReadPixels(
+		10, // x pixel starting bottom left,
+		10, // y pixel
+		16, // width in pixels, 1 = reading a single pixel
+		16, // height
+		GL_RGBA, // format, can also be GL_RGBA_INTEGER
+		GL_FLOAT, // type
+		pixels // data
+	);
+#endif
+
+	// show it
+	glBindFramebuffer(GL_FRAMEBUFFER, 0); // not technically needed
+	s32 win_w, win_h;
+	SDL_GL_GetDrawableSize(s -> window, &win_w, &win_h);
+	glViewport(0, 0, win_w, win_h); // not technically needed
+
+	// copy framebuf to window?
+	glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuf);
+	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+	glBlitFramebuffer(0, 0, fb_w, fb_h, 0, 0, win_w, win_h, GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT, GL_NEAREST);
+
+	// deletes
+	glDeleteBuffers(1, &vertex_buffer);
+	glDeleteVertexArrays(1, &vert_array);
+	glDeleteFramebuffers(1, &framebuf);
+	glDeleteTextures(1, &render_tex);
+
+	SDL_GL_SwapWindow(s -> window);
+}
+
+/*
+ * so entry point, return non zero to quit program
+ * return 0 to reload so
+*/
+int sdfps_main(int argc, char **argv, Sdfps **u_data) {
+	/* TODO: actually copy gur data over from gur kv store */
+	if (*u_data == NULL) {
+		*u_data = malloc(1024);
+		init(*u_data);
+	}
+	if (!gladLoadGLES2Loader(SDL_GL_GetProcAddress)) printf("FUCK, gl loading failed\n");
+	Sdfps *sdfps = *u_data;
+
+	while (1) {
+		SDL_Event e;
+		while (SDL_PollEvent(&e))
+			if (e.type == SDL_QUIT)
+				goto quit;
+
+		render(sdfps);
+
+		SDL_Delay(1);
+
+		if (!remove("reload-trigger")) {
+			// do some cleanup before reloading,
+			// pause your audio devices etc
+			//deinit(sdfps);
+			puts("removed reload-trigger, reloading...");
+			return 0;
+		}
+	}
+
+	quit:
+	// do what ever you got to before process dies
+	deinit(sdfps);
+	return 1;
+}
+

types.h

@@ -0,0 +1,47 @@
+// types.h
+
+#ifdef TYPES_SUBINCLUDE
+#undef TYPES_SUBINCLUDE
+
+/*
+ * Idea i had would be to have user data point to a key-value store based on struct meta data of
+ * our state, we would then encode into that before unloading, when we reload we check to see
+ * what's been serialised and pull it back out in to gur new potentially changed struct, this
+ * would in theory be more straight forward to understand than having 2 copies, or alternatively
+ * copying them in place like i was doing before
+*/
+
+struct(Sdfps,
+	field(SDL_Window *, window, NULL)
+	field(SDL_GLContext, context, NULL)
+
+	field(GLuint, vert_shader, 0)
+	field(GLuint, frag_shader, 0)
+	field(GLuint, shader_program, 0)
+)
+
+#else
+
+#include <stdint.h>
+
+typedef int8_t s8;
+typedef uint8_t u8;
+typedef int16_t s16;
+typedef uint16_t u16;
+typedef int32_t s32;
+typedef uint32_t u32;
+typedef int64_t s64;
+typedef uint64_t u64;
+typedef float f32;
+typedef double f64;
+
+/* initial struct definitions */
+#define struct(TN, ...) typedef struct TN TN; struct TN { __VA_ARGS__ };
+#define field(T, N, D) T N;
+
+#define TYPES_SUBINCLUDE
+#include __FILE__
+#undef struct
+#undef field
+
+#endif