mirror of https://github.com/axmolengine/axmol.git
165 lines
6.0 KiB
C
165 lines
6.0 KiB
C
/*
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Implementation notes:
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- An OOP style is used where each "class" is made up of a struct and a number of functions prefixed with the struct name.
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- struct fields that are const are readonly. Either they are set in a create function and can never be changed, or they can only
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be changed by calling a function.
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- Inheritance is done using a struct field named "super" as the first field, allowing the struct to be cast to its "super class".
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This works because a pointer to a struct is guaranteed to be a pointer to the first struct field.
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- Classes intended for inheritance provide init/deinit functions which subclasses must call in their create/dispose functions.
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- Polymorphism is done by a base class providing function pointers in its init function. The public API delegates to this
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function.
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- Subclasses do not provide a dispose function, instead the base class' dispose function should be used, which will delegate to
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a dispose function pointer.
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- Classes not designed for inheritance cannot be extended because they may use an internal subclass to hide private data and don't
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expose function pointers.
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- The public API hides implementation details, such as init/deinit functions. An internal API is exposed by extension.h to allow
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classes to be extended. Internal functions begin with underscore (_).
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- 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.
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- If SPINE_SHORT_NAMES is defined, the "sp" prefix for all class names is optional.
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*/
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#ifndef SPINE_EXTENSION_H_
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#define SPINE_EXTENSION_H_
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/* All allocation uses these. */
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#define MALLOC(TYPE,COUNT) ((TYPE*)_malloc(sizeof(TYPE) * COUNT))
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#define CALLOC(TYPE,COUNT) ((TYPE*)_calloc(COUNT, sizeof(TYPE)))
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#define NEW(TYPE) CALLOC(TYPE,1)
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/* Gets the direct super class. Type safe. */
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#define SUPER(VALUE) (&VALUE->super)
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/* Cast to a super class. Not type safe, use with care. Prefer SUPER() where possible. */
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#define SUPER_CAST(TYPE,VALUE) ((TYPE*)VALUE)
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/* Cast to a sub class. Not type safe, use with care. */
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#define SUB_CAST(TYPE,VALUE) ((TYPE*)VALUE)
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/* Casts away const. Can be used as an lvalue. Not type safe, use with care. */
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#define CONST_CAST(TYPE,VALUE) (*(TYPE*)&VALUE)
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/* Gets the vtable for the specified type. Not type safe, use with care. */
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#define VTABLE(TYPE,VALUE) ((_##TYPE##Vtable*)((TYPE*)VALUE)->vtable)
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/* Frees memory. Can be used on const types. */
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#define FREE(VALUE) _free((void*)VALUE)
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/* Allocates a new char[], assigns it to TO, and copies FROM to it. Can be used on const types. */
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#define MALLOC_STR(TO,FROM) strcpy(CONST_CAST(char*, TO) = (char*)malloc(strlen(FROM) + 1), FROM)
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#ifdef __STDC_VERSION__
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#define FMOD(A,B) fmodf(A, B)
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#else
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#define FMOD(A,B) (float)fmod(A, B)
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <spine/Skeleton.h>
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#include <spine/RegionAttachment.h>
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#include <spine/BoundingBoxAttachment.h>
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#include <spine/Animation.h>
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#include <spine/Atlas.h>
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#include <spine/AttachmentLoader.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Functions that must be implemented:
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*/
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void _spAtlasPage_createTexture (spAtlasPage* self, const char* path);
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void _spAtlasPage_disposeTexture (spAtlasPage* self);
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char* _spUtil_readFile (const char* path, int* length);
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#ifdef SPINE_SHORT_NAMES
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#define _AtlasPage_createTexture(...) _spAtlasPage_createTexture(__VA_ARGS__)
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#define _AtlasPage_disposeTexture(...) _spAtlasPage_disposeTexture(__VA_ARGS__)
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#define _Util_readFile(...) _spUtil_readFile(__VA_ARGS__)
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#endif
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/*
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* Internal API available for extension:
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*/
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void* _malloc (size_t size);
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void* _calloc (size_t num, size_t size);
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void _free (void* ptr);
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void _setMalloc (void* (*_malloc) (size_t size));
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void _setFree (void (*_free) (void* ptr));
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char* _readFile (const char* path, int* length);
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/**/
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void _spAttachmentLoader_init (spAttachmentLoader* self, /**/
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void (*dispose) (spAttachmentLoader* self), /**/
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spAttachment* (*newAttachment) (spAttachmentLoader* self, spSkin* skin, spAttachmentType type, const char* name));
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void _spAttachmentLoader_deinit (spAttachmentLoader* self);
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void _spAttachmentLoader_setError (spAttachmentLoader* self, const char* error1, const char* error2);
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void _spAttachmentLoader_setUnknownTypeError (spAttachmentLoader* self, spAttachmentType type);
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#ifdef SPINE_SHORT_NAMES
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#define _AttachmentLoader_init(...) _spAttachmentLoader_init(__VA_ARGS__)
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#define _AttachmentLoader_deinit(...) _spAttachmentLoader_deinit(__VA_ARGS__)
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#define _AttachmentLoader_setError(...) _spAttachmentLoader_setError(__VA_ARGS__)
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#define _AttachmentLoader_setUnknownTypeError(...) _spAttachmentLoader_setUnknownTypeError(__VA_ARGS__)
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#endif
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/**/
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void _spAttachment_init (spAttachment* self, const char* name, spAttachmentType type, /**/
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void (*dispose) (spAttachment* self));
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void _spAttachment_deinit (spAttachment* self);
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#ifdef SPINE_SHORT_NAMES
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#define _Attachment_init(...) _spAttachment_init(__VA_ARGS__)
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#define _Attachment_deinit(...) _spAttachment_deinit(__VA_ARGS__)
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#endif
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/**/
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void _spTimeline_init (spTimeline* self, spTimelineType type, /**/
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void (*dispose) (spTimeline* self), /**/
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void (*apply) (const spTimeline* self, spSkeleton* skeleton, float lastTime, float time, spEvent** firedEvents,
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int* eventCount, float alpha));
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void _spTimeline_deinit (spTimeline* self);
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#ifdef SPINE_SHORT_NAMES
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#define _Timeline_init(...) _spTimeline_init(__VA_ARGS__)
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#define _Timeline_deinit(...) _spTimeline_deinit(__VA_ARGS__)
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#endif
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/**/
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void _spCurveTimeline_init (spCurveTimeline* self, spTimelineType type, int frameCount, /**/
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void (*dispose) (spTimeline* self), /**/
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void (*apply) (const spTimeline* self, spSkeleton* skeleton, float lastTime, float time, spEvent** firedEvents,
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int* eventCount, float alpha));
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void _spCurveTimeline_deinit (spCurveTimeline* self);
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#ifdef SPINE_SHORT_NAMES
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#define _CurveTimeline_init(...) _spCurveTimeline_init(__VA_ARGS__)
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#define _CurveTimeline_deinit(...) _spCurveTimeline_deinit(__VA_ARGS__)
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* SPINE_EXTENSION_H_ */
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