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extension.h
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extension.h
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/******************************************************************************
* Spine Runtimes License Agreement
* Last updated July 28, 2023. Replaces all prior versions.
*
* Copyright (c) 2013-2023, Esoteric Software LLC
*
* Integration of the Spine Runtimes into software or otherwise creating
* derivative works of the Spine Runtimes is permitted under the terms and
* conditions of Section 2 of the Spine Editor License Agreement:
* http://esotericsoftware.com/spine-editor-license
*
* Otherwise, it is permitted to integrate the Spine Runtimes into software or
* otherwise create derivative works of the Spine Runtimes (collectively,
* "Products"), provided that each user of the Products must obtain their own
* Spine Editor license and redistribution of the Products in any form must
* include this license and copyright notice.
*
* THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
* BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THE
* SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
/*
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.
*/
#ifndef SPINE_EXTENSION_H_
#define SPINE_EXTENSION_H_
#include <spine/dll.h>
/* Required for sprintf and consorts on MSVC */
#ifdef _MSC_VER
#pragma warning(disable:4996)
#endif
/* All allocation uses these. */
#define MALLOC(TYPE, COUNT) ((TYPE*)_spMalloc(sizeof(TYPE) * (COUNT), __FILE__, __LINE__))
#define CALLOC(TYPE, COUNT) ((TYPE*)_spCalloc(COUNT, sizeof(TYPE), __FILE__, __LINE__))
#define REALLOC(PTR, TYPE, COUNT) ((TYPE*)_spRealloc(PTR, sizeof(TYPE) * (COUNT)))
#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)
/* 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) _spFree((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(TO = (char*)MALLOC(char, strlen(FROM) + 1), FROM)
#define PI 3.1415926535897932385f
#define PI2 (PI * 2)
#define INV_PI2 (1 / PI2)
#define DEG_RAD (PI / 180)
#define RAD_DEG (180 / PI)
#define ABS(A) ((A) < 0? -(A): (A))
#define SIGNUM(A) ((A) < 0? -1.0f: (A) > 0 ? 1.0f : 0.0f)
#define CEIL(a) ((float)ceil(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)
#define POW(A,B) pow(A, B)
#define ISNAN(A) (int)isnan(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)
#define POW(A, B) (float)pow(A, B)
#define ISNAN(A) (int)isnan(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 ATAN2DEG(A, B) ((float)ATAN2(A, B) * RAD_DEG)
#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/ClippingAttachment.h>
#include <spine/PathAttachment.h>
#include <spine/PointAttachment.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);
/*
* Internal API available for extension:
*/
void *_spMalloc(size_t size, const char *file, int line);
void *_spCalloc(size_t num, size_t size, const char *file, int line);
void *_spRealloc(void *ptr, size_t size);
void _spFree(void *ptr);
float _spRandom(void);
SP_API void _spSetMalloc(void *(*_malloc)(size_t size));
SP_API void _spSetDebugMalloc(void *(*_malloc)(size_t size, const char *file, int line));
SP_API void _spSetRealloc(void *(*_realloc)(void *ptr, size_t size));
SP_API void _spSetFree(void (*_free)(void *ptr));
SP_API void _spSetRandom(float (*_random)(void));
char *_spReadFile(const char *path, int *length);
/*
* Math utilities
*/
float _spMath_random(float min, float max);
float _spMath_randomTriangular(float min, float max);
float _spMath_randomTriangularWith(float min, float max, float mode);
float _spMath_interpolate(float (*apply)(float a), float start, float end, float a);
float _spMath_pow2_apply(float a);
float _spMath_pow2out_apply(float a);
/**/
typedef union _spEventQueueItem {
int type;
spTrackEntry *entry;
spEvent *event;
} _spEventQueueItem;
typedef struct _spAnimationState _spAnimationState;
typedef struct _spEventQueue {
_spAnimationState *state;
_spEventQueueItem *objects;
int objectsCount;
int objectsCapacity;
int /*boolean*/ drainDisabled;
} _spEventQueue;
struct _spAnimationState {
spAnimationState super;
int eventsCount;
spEvent **events;
_spEventQueue *queue;
spPropertyId *propertyIDs;
int propertyIDsCount;
int propertyIDsCapacity;
int /*boolean*/ animationsChanged;
};
/**/
/* 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, spSequence *sequence),
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);
/**/
void _spAttachment_init(spAttachment *self, const char *name, spAttachmentType type,
void (*dispose)(spAttachment *self), spAttachment *(*copy)(spAttachment *self));
void _spAttachment_deinit(spAttachment *self);
void _spVertexAttachment_init(spVertexAttachment *self);
void _spVertexAttachment_deinit(spVertexAttachment *self);
#ifdef __cplusplus
}
#endif
#endif /* SPINE_EXTENSION_H_ */