book_paged.h

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#pragma once
 
#include <stddef.h>
#include <stdint.h>
 
#include "book.h"
#include "ra8_err.h"
#include "ra8_vmem.h"
 
#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
  const uint8_t* base;        
  ra8_vmem_t*    vm;          
  uint32_t       object_id;   
  uint32_t       frame_bytes; 
  uint32_t       size;        
  book_header_t  hdr;         
} book_src_t;

[[nodiscard]] ra8_err_t book_src_resident(book_src_t* out, const void* base, uint32_t size);

[[nodiscard]] ra8_err_t book_src_paged(book_src_t* out,
                                       ra8_vmem_t* vm,
                                       uint32_t    object_id,
                                       uint32_t    frame_bytes,
                                       uint32_t    size);

[[nodiscard]] ra8_err_t book_src_read(const book_src_t* src, uint32_t off, void* dst, uint32_t len);

[[nodiscard]] ra8_err_t book_src_image(const book_src_t* src, uint32_t idx, book_image_t* out_img);

[[nodiscard]] ra8_err_t book_src_image_rect(const book_src_t*   src,
                                            const book_image_t* img,
                                            uint32_t            x,
                                            uint32_t            y,
                                            uint32_t            w,
                                            uint32_t            h,
                                            uint8_t*            out,
                                            uint32_t            out_stride);

[[nodiscard]] ra8_err_t book_chapter_text_src(const book_src_t* src,
                                              uint32_t          chapter_idx,
                                              char*             out,
                                              size_t            cap,
                                              size_t*           out_len);

[[nodiscard]] ra8_err_t book_src_prefetch_chapter(const book_src_t* src, uint32_t chapter_idx);
 
#ifdef __cplusplus
}
#endif