/* Implementation notes: - An OOP style is used where each "class" is made up of a struct and a number of functions prefixed with the struct name. - struct fields that are const are readonly. Either they are set in a create function and can never be changed, or they can only be changed by calling a function. - Inheritance is done using a struct field named "super" as the first field, allowing the struct to be cast to its "super class". This works because a pointer to a struct is guaranteed to be a pointer to the first struct field. - Classes intended for inheritance provide init/deinit functions which subclasses must call in their create/dispose functions. - Polymorphism is done by a base class providing function pointers in its init function. The public API delegates to these function pointers. - Subclasses do not provide a dispose function, instead the base class' dispose function should be used, which will delegate to a dispose function pointer. - Classes not designed for inheritance cannot be extended because they may use an internal subclass to hide private data and don't expose function pointers. - The public API hides implementation details, such as init/deinit functions. An internal API is exposed by extension.h to allow classes to be extended. Internal functions begin with underscore (_). - OOP in C tends to lose type safety. Macros for casting are provided in extension.h to give context for why a cast is being done. - If SPINE_SHORT_NAMES is defined, the "sp" prefix for all class names is optional. */ #ifndef SPINE_EXTENSION_H_ #define SPINE_EXTENSION_H_ /* All allocation uses these. */ #define MALLOC(TYPE,COUNT) ((TYPE*)_malloc(sizeof(TYPE) * (COUNT), __FILE__, __LINE__)) #define CALLOC(TYPE,COUNT) ((TYPE*)_calloc(COUNT, sizeof(TYPE), __FILE__, __LINE__)) #define NEW(TYPE) CALLOC(TYPE,1) /* Gets the direct super class. Type safe. */ #define SUPER(VALUE) (&VALUE->super) /* Cast to a super class. Not type safe, use with care. Prefer SUPER() where possible. */ #define SUPER_CAST(TYPE,VALUE) ((TYPE*)VALUE) /* Cast to a sub class. Not type safe, use with care. */ #define SUB_CAST(TYPE,VALUE) ((TYPE*)VALUE) /* Casts away const. Can be used as an lvalue. Not type safe, use with care. */ #define CONST_CAST(TYPE,VALUE) (*(TYPE*)&VALUE) /* Gets the vtable for the specified type. Not type safe, use with care. */ #define VTABLE(TYPE,VALUE) ((_##TYPE##Vtable*)((TYPE*)VALUE)->vtable) /* Frees memory. Can be used on const types. */ #define FREE(VALUE) _free((void*)VALUE) /* Allocates a new char[], assigns it to TO, and copies FROM to it. Can be used on const types. */ #define MALLOC_STR(TO,FROM) strcpy(CONST_CAST(char*, TO) = (char*)MALLOC(char, strlen(FROM) + 1), FROM) #define PI 3.1415926535897932385f #define PI2 (PI * 2) #define DEG_RAD (PI / 180) #define RAD_DEG (180 / PI) #define ABS(A) ((A) < 0? -(A): (A)) #ifdef __STDC_VERSION__ #define FMOD(A,B) fmodf(A, B) #define ATAN2(A,B) atan2f(A, B) #define SIN(A) sinf(A) #define COS(A) cosf(A) #define SQRT(A) sqrtf(A) #define ACOS(A) acosf(A) #else #define FMOD(A,B) (float)fmod(A, B) #define ATAN2(A,B) (float)atan2(A, B) #define COS(A) (float)cos(A) #define SIN(A) (float)sin(A) #define SQRT(A) (float)sqrt(A) #define ACOS(A) (float)acos(A) #endif #define SIN_DEG(A) SIN((A) * DEG_RAD) #define COS_DEG(A) COS((A) * DEG_RAD) #define CLAMP(x, min, max) ((x) < (min) ? (min) : ((x) > (max) ? (max) : (x))) #ifndef MIN #define MIN(x, y) ((x) < (y) ? (x) : (y)) #endif #ifndef MAX #define MAX(x, y) ((x) > (y) ? (x) : (y)) #endif #define UNUSED(x) (void)(x) #include <stdlib.h> #include <string.h> #include <math.h> #include <spine/Skeleton.h> #include <spine/Animation.h> #include <spine/Atlas.h> #include <spine/AttachmentLoader.h> #include <spine/VertexAttachment.h> #include <spine/RegionAttachment.h> #include <spine/MeshAttachment.h> #include <spine/BoundingBoxAttachment.h> #include <spine/PathAttachment.h> #include <spine/AnimationState.h> #ifdef __cplusplus extern "C" { #endif /* * Functions that must be implemented: */ void _spAtlasPage_createTexture (spAtlasPage* self, const char* path); void _spAtlasPage_disposeTexture (spAtlasPage* self); char* _spUtil_readFile (const char* path, int* length); #ifdef SPINE_SHORT_NAMES #define _AtlasPage_createTexture(...) _spAtlasPage_createTexture(__VA_ARGS__) #define _AtlasPage_disposeTexture(...) _spAtlasPage_disposeTexture(__VA_ARGS__) #define _Util_readFile(...) _spUtil_readFile(__VA_ARGS__) #endif /* * Internal API available for extension: */ void* _malloc (size_t size, const char* file, int line); void* _calloc (size_t num, size_t size, const char* file, int line); void _free (void* ptr); void _setMalloc (void* (*_malloc) (size_t size)); void _setDebugMalloc (void* (*_malloc) (size_t size, const char* file, int line)); void _setFree (void (*_free) (void* ptr)); char* _readFile (const char* path, int* length); /**/ typedef struct _spAnimationState { spAnimationState super; spEvent** events; spTrackEntry* (*createTrackEntry) (spAnimationState* self); void (*disposeTrackEntry) (spTrackEntry* entry); #ifdef __cplusplus _spAnimationState() : super(), events(0), createTrackEntry(0), disposeTrackEntry(0) { } #endif } _spAnimationState; spTrackEntry* _spTrackEntry_create (spAnimationState* self); void _spTrackEntry_dispose (spTrackEntry* self); /**/ /* configureAttachment and disposeAttachment may be 0. */ void _spAttachmentLoader_init (spAttachmentLoader* self, void (*dispose) (spAttachmentLoader* self), spAttachment* (*createAttachment) (spAttachmentLoader* self, spSkin* skin, spAttachmentType type, const char* name, const char* path), void (*configureAttachment) (spAttachmentLoader* self, spAttachment*), void (*disposeAttachment) (spAttachmentLoader* self, spAttachment*) ); void _spAttachmentLoader_deinit (spAttachmentLoader* self); /* Can only be called from createAttachment. */ void _spAttachmentLoader_setError (spAttachmentLoader* self, const char* error1, const char* error2); void _spAttachmentLoader_setUnknownTypeError (spAttachmentLoader* self, spAttachmentType type); #ifdef SPINE_SHORT_NAMES #define _AttachmentLoader_init(...) _spAttachmentLoader_init(__VA_ARGS__) #define _AttachmentLoader_deinit(...) _spAttachmentLoader_deinit(__VA_ARGS__) #define _AttachmentLoader_setError(...) _spAttachmentLoader_setError(__VA_ARGS__) #define _AttachmentLoader_setUnknownTypeError(...) _spAttachmentLoader_setUnknownTypeError(__VA_ARGS__) #endif /**/ void _spAttachment_init (spAttachment* self, const char* name, spAttachmentType type, void (*dispose) (spAttachment* self)); void _spAttachment_deinit (spAttachment* self); void _spVertexAttachment_deinit (spVertexAttachment* self); #ifdef SPINE_SHORT_NAMES #define _Attachment_init(...) _spAttachment_init(__VA_ARGS__) #define _Attachment_deinit(...) _spAttachment_deinit(__VA_ARGS__) #define _VertexAttachment_deinit(...) _spVertexAttachment_deinit(__VA_ARGS__) #endif /**/ void _spTimeline_init (spTimeline* self, spTimelineType type, void (*dispose) (spTimeline* self), void (*apply) (const spTimeline* self, spSkeleton* skeleton, float lastTime, float time, spEvent** firedEvents, int* eventsCount, float alpha)); void _spTimeline_deinit (spTimeline* self); #ifdef SPINE_SHORT_NAMES #define _Timeline_init(...) _spTimeline_init(__VA_ARGS__) #define _Timeline_deinit(...) _spTimeline_deinit(__VA_ARGS__) #endif /**/ void _spCurveTimeline_init (spCurveTimeline* self, spTimelineType type, int framesCount, void (*dispose) (spTimeline* self), void (*apply) (const spTimeline* self, spSkeleton* skeleton, float lastTime, float time, spEvent** firedEvents, int* eventsCount, float alpha)); void _spCurveTimeline_deinit (spCurveTimeline* self); #ifdef SPINE_SHORT_NAMES #define _CurveTimeline_init(...) _spCurveTimeline_init(__VA_ARGS__) #define _CurveTimeline_deinit(...) _spCurveTimeline_deinit(__VA_ARGS__) #endif #ifdef __cplusplus } #endif #endif /* SPINE_EXTENSION_H_ */