terom@30: cdef extern from "errno.h" :
terom@30:     extern int errno
terom@30: 
terom@30: cdef extern from "string.h" :
terom@30:     char* strerror (int err)
terom@30: 
terom@30: cimport stdio
terom@30: cimport stdlib
terom@30: cimport python_string
terom@30: 
terom@30: cdef extern from "Python.h" :
terom@30:     int PyFile_Check (object p)
terom@30:     stdio.FILE* PyFile_AsFile (object p)
terom@30:     void PyFile_IncUseCount (object p)
terom@30:     void PyFile_DecUseCount (object p)
terom@30: 
terom@30: cdef extern from "pngtile.h" :
terom@30:     struct pt_ctx :
terom@30:         pass
terom@30: 
terom@30:     struct pt_image :
terom@30:         pass
terom@30: 
terom@30:     enum pt_open_mode :
terom@30:         PT_OPEN_UPDATE
terom@30: 
terom@30:     enum pt_cache_status :
terom@30:         PT_CACHE_ERROR
terom@30:         PT_CACHE_FRESH
terom@30:         PT_CACHE_NONE
terom@30:         PT_CACHE_STALE
terom@30: 
terom@30:     struct pt_image_info :
terom@30:         size_t width, height
terom@30: 
terom@30:     struct pt_tile_info :
terom@30:         size_t width, height
terom@30:         size_t x, y
terom@34:         int zoom
terom@30:         
terom@30:     int pt_image_open (pt_image **image_ptr, pt_ctx *ctx, char *png_path, int cache_mode)
terom@30:     int pt_image_info_func "pt_image_info" (pt_image *image, pt_image_info **info_ptr)
terom@30:     int pt_image_status (pt_image *image)
terom@30:     int pt_image_update (pt_image *image)
terom@30:     int pt_image_tile_file (pt_image *image, pt_tile_info *info, stdio.FILE *out)
terom@30:     int pt_image_tile_mem (pt_image *image, pt_tile_info *info, char **buf_ptr, size_t *len_ptr)
terom@30:     void pt_image_destroy (pt_image *image)
terom@30: 
terom@30:     char* pt_strerror (int err)
terom@30: 
terom@30: OPEN_UPDATE = PT_OPEN_UPDATE
terom@30: CACHE_ERROR = PT_CACHE_ERROR
terom@30: CACHE_FRESH = PT_CACHE_FRESH
terom@30: CACHE_NONE = PT_CACHE_NONE
terom@30: CACHE_STALE = PT_CACHE_STALE
terom@30: 
terom@30: class Error (BaseException) :
terom@30:     pass
terom@30: 
terom@30: cdef int trap_err (char *op, int ret) except -1 :
terom@30:     if ret < 0 :
terom@30:         raise Error("%s: %s: %s" % (op, pt_strerror(ret), strerror(errno)))
terom@30: 
terom@30:     else :
terom@30:         return ret
terom@30: 
terom@30: cdef class Image :
terom@30:     cdef pt_image *image
terom@30: 
terom@30:     def __cinit__ (self, char *png_path, int cache_mode = 0) :
terom@30:         trap_err("pt_image_open", 
terom@30:             pt_image_open(&self.image, NULL, png_path, cache_mode)
terom@30:         )
terom@30:     
terom@30:     def info (self) :
terom@30:         cdef pt_image_info *image_info
terom@30:         
terom@30:         trap_err("pt_image_info",
terom@30:             pt_image_info_func(self.image, &image_info)
terom@30:         )
terom@30: 
terom@30:         return (image_info.width, image_info.height)
terom@30:     
terom@30:     def status (self) :
terom@30:         return trap_err("pt_image_status", 
terom@30:             pt_image_status(self.image)
terom@30:         )
terom@30:     
terom@30:     def update (self) :
terom@30:         trap_err("pt_image_update", 
terom@30:             pt_image_update(self.image)
terom@30:         )
terom@30: 
terom@34:     def tile_file (self, size_t width, size_t height, size_t x, size_t y, int zoom, object out) :
terom@30:         cdef stdio.FILE *outf
terom@30:         cdef pt_tile_info ti
terom@30: 
terom@30:         if not PyFile_Check(out) :
terom@30:             raise TypeError("out: must be a file object")
terom@30: 
terom@30:         outf = PyFile_AsFile(out)
terom@30: 
terom@30:         if not outf :
terom@30:             raise TypeError("out: must have a FILE*")
terom@30:     
terom@30:         ti.width = width
terom@30:         ti.height = height
terom@30:         ti.x = x
terom@30:         ti.y = y
terom@34:         ti.zoom = zoom
terom@30:         
terom@30:         trap_err("pt_image_tile_file", 
terom@30:             pt_image_tile_file(self.image, &ti, outf)
terom@30:         )
terom@30: 
terom@34:     def tile_mem (self, size_t width, size_t height, size_t x, size_t y, int zoom) :
terom@30:         cdef pt_tile_info ti
terom@30:         cdef char *buf
terom@30:         cdef size_t len
terom@30: 
terom@30:         ti.width = width
terom@30:         ti.height = height
terom@30:         ti.x = x
terom@30:         ti.y = y
terom@34:         ti.zoom = zoom
terom@30:         
terom@30:         # render and return ptr to buffer
terom@30:         trap_err("pt_image_tile_mem", 
terom@30:             pt_image_tile_mem(self.image, &ti, &buf, &len)
terom@30:         )
terom@30:         
terom@30:         # copy buffer as str...
terom@30:         data = python_string.PyString_FromStringAndSize(buf, len)
terom@30: 
terom@30:         # drop buffer...
terom@30:         stdlib.free(buf)
terom@30: 
terom@30:         return data
terom@30: 
terom@30:     def __dealloc__ (self) :
terom@30:         if self.image :
terom@30:             pt_image_destroy(self.image)
terom@30: