608 lines
24 KiB
C
608 lines
24 KiB
C
/* app/book.c — 书桥实现（见 app/book.h）：把 rd_src（TXT/FB2/EPUB/MOBI 段契约 + CBZ 图页）
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* + engine(FreeType/rdimg) 串成「一本书」。
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*
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* 文本格式：build_index 逐段 rd_src_next → 每段 utf8→码点→rd_layout → 页索引（flat：段+段内字符偏移）
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* （即 rdtxt 同款 UTF-8 段契约喂排版器）；渲染按段重显。锚定 (段,字符偏移) 与字号无关。
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* CBZ：纯图页，npages=图片数，render 用 rdimg 解码+降采样写内容区。
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*/
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#include "book.h"
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#include "rdsrc.h"
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#include "rdtxt.h"
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#include "rdlayout.h"
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#include "rdimg.h"
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#include "../engine/rdft.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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typedef struct seg {
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int page_start; /* 全局页表起点 */
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int page_count; /* 本段页数 */
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} seg_t;
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struct rd_book {
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char path[400];
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char font[400];
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char base[256];
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const char *encname; /* TXT 有效编码可读名（含覆盖后）；非 TXT = "" */
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rd_enc_t enc; /* TXT 有效编码；非 TXT = RD_ENC_UTF8 */
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rdft *ft;
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rd_src *src;
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rd_fmt_t fmt;
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int is_img; /* 1=CBZ 图片书 */
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int fs, ls, pw, ph, mx, my, top;
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int content_w, content_h;
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seg_t *segs; int nsegs;
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rd_book_page *pages; int npages; /* flat 页表（文本） */
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int cur;
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/* 当前渲染段复用缓冲 */
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uint8_t *seg_utf8; size_t seg_utf8_cap;
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uint32_t *seg_cps; size_t seg_cps_n, seg_cps_cap;
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rd_line *seg_lines; rd_page *seg_pages; int seg_nlines, seg_npages;
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int seg_cache_idx;
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};
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/* ---- 页索引持久化（MeowData；见 rd_book_set_index_dir） ----
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* build_index 对整书逐段 reflow 建 flat 页表，是开大书最贵的步骤（无持久化时每次打开都重跑）。
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* 宿主快 ≠ 真机快：同一书 MIPS 上仍需数秒。这里把 (segs + pages) 落盘成 {path 哈希}.idx，
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* 以 (file_size, file_mtime, font path+mt, fs, ls, content_w, content_h, enc) 为失效键——
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* 书/字号/行距/版面/编码/字体任一变了即自动重排并重写，其余情况命中缓存秒开。
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* 纯 libc（无 SDK）：reader.c 用 meow_config_dir 推导 MeowData dir 注入；冒烟/无卡时 dir 为空 → 直排不持久。 */
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static char g_index_dir[400]; /* 索引缓存目录; 空 = 禁用 */
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void rd_book_set_index_dir(const char *dir)
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{
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if (dir && dir[0]) { strncpy(g_index_dir, dir, sizeof g_index_dir - 1); g_index_dir[sizeof g_index_dir - 1] = 0; }
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else g_index_dir[0] = 0;
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}
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#define IDX_MAGIC0 'R'
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#define IDX_MAGIC1 'I'
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#define IDX_MAGIC2 'D'
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#define IDX_MAGIC3 'X'
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#define IDX_VER 1u
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static int fio_rd(FILE *f, void *p, size_t n) { return fread(p, 1, n, f) == n; }
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static int fio_wr(FILE *f, const void *p, size_t n) { return fwrite(p, 1, n, f) == n; }
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static uint32_t idx_fnv1a(const char *s)
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{
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uint32_t h = 2166136261u;
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for (const unsigned char *p = (const unsigned char *)s; *p; p++) { h ^= *p; h *= 16777619u; }
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return h;
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}
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static int index_cache_path(const rd_book *b, char *out, int outsz)
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{
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if (!g_index_dir[0]) return -1;
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if (snprintf(out, (size_t)outsz, "%s/%08x.idx", g_index_dir, idx_fnv1a(b->path)) >= outsz) return -1;
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return 0;
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}
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/* 编码枚举 → 可读名（R3：Big5 正确解码后名实相符）。 */
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static const char *enc_to_name(rd_enc_t enc)
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{
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switch (enc) {
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case RD_ENC_UTF8: return "UTF-8";
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case RD_ENC_UTF16LE: return "UTF-16LE";
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case RD_ENC_UTF16BE: return "UTF-16BE";
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case RD_ENC_GB18030: return "GB18030";
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case RD_ENC_BIG5: return "Big5";
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case RD_ENC_ASCII: return "ASCII";
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default: return "";
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}
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}
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static const char *fmt_encname(rd_fmt_t f, rd_enc_t enc)
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{
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if (f == RD_FMT_TXT) return enc_to_name(enc);
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return "";
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}
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static int book_meas(uint32_t cp, int fs, int *adv, void *ctx)
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{
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(void)fs;
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rd_book *b = (rd_book *)ctx;
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return rdft_advance(b->ft, cp, adv);
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}
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/* 失效键：书 + 版面 + 编码 + 字体。任一变化 → 缓存不命中（重排）。 */
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typedef struct {
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uint64_t file_size;
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int64_t file_mtime;
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int64_t font_mtime; /* 字体文件 mtime；无字体(近似测宽) = 0 */
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int32_t fs, ls, cw, ch, enc;
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char font[320];
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} idx_key;
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static int index_key_fill(rd_book *b, idx_key *k)
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{
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memset(k, 0, sizeof *k);
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struct stat st;
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if (stat(b->path, &st) != 0) { k->file_size = 0; k->file_mtime = 0; }
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else { k->file_size = (uint64_t)st.st_size; k->file_mtime = (int64_t)st.st_mtime; }
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if (b->font[0]) {
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/* b->font[400] 已 NUL 结尾（open 时 <400 才收）；memcpy 319B 恒在界内且 k 已清零 → 余下为 0 */
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memcpy(k->font, b->font, sizeof k->font - 1);
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struct stat fs2;
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if (stat(b->font, &fs2) == 0) k->font_mtime = (int64_t)fs2.st_mtime;
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}
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k->fs = b->fs; k->ls = b->ls; k->cw = b->content_w; k->ch = b->content_h;
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k->enc = (int32_t)b->enc;
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return 0;
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}
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static int index_key_write(const idx_key *k, FILE *f)
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{
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const uint8_t magic[4] = { IDX_MAGIC0, IDX_MAGIC1, IDX_MAGIC2, IDX_MAGIC3 };
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uint16_t ver = IDX_VER;
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return fio_wr(f, magic, sizeof magic) && fio_wr(f, &ver, sizeof ver) &&
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fio_wr(f, &k->file_size, sizeof k->file_size) &&
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fio_wr(f, &k->file_mtime, sizeof k->file_mtime) && fio_wr(f, &k->font_mtime, sizeof k->font_mtime) &&
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fio_wr(f, &k->fs, sizeof k->fs) && fio_wr(f, &k->ls, sizeof k->ls) &&
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fio_wr(f, &k->cw, sizeof k->cw) && fio_wr(f, &k->ch, sizeof k->ch) &&
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fio_wr(f, &k->enc, sizeof k->enc) && fio_wr(f, k->font, sizeof k->font);
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}
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static int index_key_read(idx_key *k, FILE *f)
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{
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uint8_t magic[4];
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if (!fio_rd(f, magic, sizeof magic)) return 0;
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if (magic[0] != IDX_MAGIC0 || magic[1] != IDX_MAGIC1 || magic[2] != IDX_MAGIC2 || magic[3] != IDX_MAGIC3) return 0;
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uint16_t ver = 0;
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if (!fio_rd(f, &ver, sizeof ver) || ver != IDX_VER) return 0;
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if (!fio_rd(f, &k->file_size, sizeof k->file_size) || !fio_rd(f, &k->file_mtime, sizeof k->file_mtime) ||
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!fio_rd(f, &k->font_mtime, sizeof k->font_mtime) || !fio_rd(f, &k->fs, sizeof k->fs) ||
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!fio_rd(f, &k->ls, sizeof k->ls) || !fio_rd(f, &k->cw, sizeof k->cw) ||
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!fio_rd(f, &k->ch, sizeof k->ch) || !fio_rd(f, &k->enc, sizeof k->enc) ||
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!fio_rd(f, k->font, sizeof k->font)) return 0;
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k->font[sizeof k->font - 1] = 0;
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return 1;
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}
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static int index_key_eq(const idx_key *a, const idx_key *b)
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{
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return a->file_size == b->file_size && a->file_mtime == b->file_mtime &&
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a->font_mtime == b->font_mtime && a->fs == b->fs && a->ls == b->ls &&
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a->cw == b->cw && a->ch == b->ch && a->enc == b->enc &&
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strncmp(a->font, b->font, sizeof a->font) == 0;
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}
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/* 读缓存：头部与当前键一致则载入 (segs,pages) 并自检一致；返回 1=命中，0=未命中/损坏（调用方重排）。 */
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static int index_cache_load(rd_book *b)
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{
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char path[440];
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if (index_cache_path(b, path, sizeof path) != 0) return 0;
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FILE *f = fopen(path, "rb");
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if (!f) return 0;
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idx_key key, cur;
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int rc = 0;
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if (index_key_read(&key, f)) {
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index_key_fill(b, &cur);
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if (index_key_eq(&key, &cur)) {
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int32_t nsegs = 0, npages = 0;
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if (fio_rd(f, &nsegs, sizeof nsegs) && fio_rd(f, &npages, sizeof npages) &&
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nsegs >= 1 && npages >= 1 && nsegs <= 1000000 && npages <= 8000000 &&
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(uint64_t)npages <= cur.file_size + 1 && (uint64_t)nsegs <= cur.file_size + 1) {
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seg_t *segs = (seg_t *)malloc((size_t)nsegs * sizeof(seg_t));
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rd_book_page *pages = (rd_book_page *)malloc((size_t)npages * sizeof(rd_book_page));
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if (segs && pages &&
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fio_rd(f, segs, (size_t)nsegs * sizeof(seg_t)) &&
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fio_rd(f, pages, (size_t)npages * sizeof(rd_book_page))) {
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/* 自检：page_count 求和 == npages 且 page_start 链正确；每页 seg 落在所属段区间。 */
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int ok = 1, run = 0;
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for (int32_t i = 0; i < nsegs && ok; i++) {
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if (segs[i].page_count < 0 || segs[i].page_start != run) ok = 0;
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else run += segs[i].page_count;
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}
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if (ok && run == npages) {
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for (int32_t p = 0; p < npages && ok; p++) {
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int32_t sg = pages[p].seg;
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if (sg < 0 || sg >= nsegs || pages[p].seg_char < 0 ||
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p < segs[sg].page_start || p >= segs[sg].page_start + segs[sg].page_count) ok = 0;
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}
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}
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if (ok) {
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b->segs = segs; b->pages = pages;
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b->nsegs = (int)nsegs; b->npages = (int)npages;
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rc = 1; /* 命中：调用方免 build_index */
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} else { free(segs); free(pages); }
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} else { free(segs); free(pages); }
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}
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}
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}
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fclose(f);
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return rc;
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}
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/* 写缓存：先写 .tmp 再 rename（原子替换）；失败静默（下次重排）。 */
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static void index_cache_save(rd_book *b)
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{
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char path[440];
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if (b->nsegs <= 0 || b->npages <= 0) return; /* 空书无页表可缓存 */
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if (index_cache_path(b, path, sizeof path) != 0) return;
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/* 目录由 reader.c 在 set_index_dir 前建好；这里 fopen 失败（无目录/只读）→ 静默跳过（下次重排）。 */
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char tmp[480];
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if (snprintf(tmp, sizeof tmp, "%s.tmp", path) >= (int)sizeof tmp) return;
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FILE *f = fopen(tmp, "wb");
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if (!f) return;
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idx_key key;
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int ok = 1;
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index_key_fill(b, &key);
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ok = ok && index_key_write(&key, f);
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ok = ok && fio_wr(f, &b->nsegs, sizeof b->nsegs) && fio_wr(f, &b->npages, sizeof b->npages);
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if (ok && b->nsegs > 0) ok = fio_wr(f, b->segs, (size_t)b->nsegs * sizeof(seg_t));
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if (ok && b->npages > 0) ok = fio_wr(f, b->pages, (size_t)b->npages * sizeof(rd_book_page));
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fclose(f);
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if (ok) { rename(tmp, path); } else { remove(tmp); }
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}
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/* ---- 文本：建索引（逐段 layout） ---- */
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static int build_index(rd_book *b)
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{
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rd_src_reset(b->src);
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size_t cap_segs = 64, cap_pages = 1024;
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b->segs = (seg_t *)malloc(cap_segs * sizeof(seg_t));
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b->pages = (rd_book_page *)malloc(cap_pages * sizeof(rd_book_page));
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if (!b->segs || !b->pages) return -6;
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b->nsegs = b->npages = 0;
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uint8_t *utf8 = (uint8_t *)malloc(RDTXT_SEG_UTF8_MAX + 8);
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if (!utf8) return -6;
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int seg_idx = 0;
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size_t ulen = 0;
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while (rd_src_next(b->src, utf8, RDTXT_SEG_UTF8_MAX + 8, &ulen) == 0) {
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if (seg_idx >= (int)cap_segs) { cap_segs *= 2; b->segs = (seg_t *)realloc(b->segs, cap_segs * sizeof(seg_t)); }
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uint32_t *cps = NULL; size_t n = 0;
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rd_utf8_to_cp(utf8, ulen, &cps, &n);
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rd_layout_in in;
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rd_layout_out out;
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rd_line *lines = (rd_line *)malloc((n ? n : 1) * sizeof(rd_line));
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rd_page *pages = (rd_page *)malloc((n ? n : 1) * sizeof(rd_page));
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if (!lines || !pages) { free(lines); free(pages); free(cps); free(utf8); return -6; }
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in.chars = cps; in.n = (int32_t)n; in.fs = b->fs; in.line_scale = b->ls;
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in.page_w = b->content_w; in.page_h = b->content_h; in.indent = b->fs;
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in.meas = book_meas; in.mctx = b;
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out.lines = lines; out.pages = pages; out.max_lines = (int)(n ? n : 1); out.max_pages = (int)(n ? n : 1);
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int lrc = rd_layout(&in, &out);
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free(cps);
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if (lrc != RD_LAYOUT_OK) { free(lines); free(pages); break; }
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b->segs[seg_idx].page_start = b->npages;
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b->segs[seg_idx].page_count = out.npages;
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for (int p = 0; p < out.npages; p++) {
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if (b->npages >= (int)cap_pages) { cap_pages *= 2; b->pages = (rd_book_page *)realloc(b->pages, cap_pages * sizeof(rd_book_page)); }
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b->pages[b->npages].seg = seg_idx;
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b->pages[b->npages].seg_char = out.pages[p].first_char;
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b->npages++;
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}
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free(lines); free(pages);
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seg_idx++;
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}
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free(utf8);
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b->nsegs = seg_idx;
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return 0;
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}
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/* ---- 正文重显 + 布局到复用缓冲 ---- */
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static int load_seg(rd_book *b, int seg_idx)
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{
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if (seg_idx == b->seg_cache_idx) return 0;
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size_t cap = RDTXT_SEG_UTF8_MAX + 8;
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if (!b->seg_utf8) b->seg_utf8 = (uint8_t *)malloc(cap);
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if (!b->seg_utf8) return -6;
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size_t ulen = 0;
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if (rd_src_seg(b->src, seg_idx, b->seg_utf8, cap, &ulen) != 0) return -4;
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size_t n = 0;
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free(b->seg_cps); b->seg_cps = NULL;
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if (rd_utf8_to_cp(b->seg_utf8, ulen, &b->seg_cps, &n) != RD_ENC_OK) return -5;
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b->seg_cps_n = n;
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if (b->seg_lines) free(b->seg_lines);
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if (b->seg_pages) free(b->seg_pages);
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b->seg_lines = (rd_line *)malloc((n ? n : 1) * sizeof(rd_line));
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b->seg_pages = (rd_page *)malloc((n ? n : 1) * sizeof(rd_page));
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if (!b->seg_lines || !b->seg_pages) return -6;
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rd_layout_in in;
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rd_layout_out out;
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in.chars = b->seg_cps; in.n = (int32_t)n; in.fs = b->fs; in.line_scale = b->ls;
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in.page_w = b->content_w; in.page_h = b->content_h; in.indent = b->fs;
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in.meas = book_meas; in.mctx = b;
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out.lines = b->seg_lines; out.pages = b->seg_pages; out.max_lines = (int)(n ? n : 1); out.max_pages = (int)(n ? n : 1);
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int lrc = rd_layout(&in, &out);
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if (lrc != RD_LAYOUT_OK) { b->seg_nlines = b->seg_npages = 0; b->seg_cache_idx = -1; return -4; }
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b->seg_nlines = out.nlines; b->seg_npages = out.npages;
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b->seg_cache_idx = seg_idx;
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return 0;
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}
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int rd_book_open(rd_book **b, const char *path, const char *font_path,
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int fs, int ls, int pw, int ph, int mx, int my, int top)
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{
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if (!b || !path) return -1;
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rd_book *x = (rd_book *)calloc(1, sizeof *x);
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if (!x) return -6;
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if (strlen(path) >= sizeof x->path) { free(x); return -2; }
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strcpy(x->path, path);
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if (font_path) { if (strlen(font_path) >= sizeof x->font) { free(x); return -2; } strcpy(x->font, font_path); }
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const char *sl = strrchr(path, '/');
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strncpy(x->base, sl ? sl + 1 : path, sizeof x->base - 1); x->base[sizeof x->base - 1] = 0;
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char *dot = strrchr(x->base, '.'); if (dot) *dot = 0;
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if (fs <= 0) fs = 20;
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if (ls <= 0) ls = 130;
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x->fs = fs; x->ls = ls; x->pw = pw; x->ph = ph; x->mx = mx; x->my = my; x->top = top;
|
||
x->content_w = pw - 2 * mx;
|
||
x->content_h = ph - top - my;
|
||
if (x->content_w < 10 || x->content_h < 10) { goto close; }
|
||
|
||
if (rd_src_open(&x->src, path) != 0) goto close;
|
||
x->fmt = rd_src_fmt(x->src);
|
||
x->enc = RD_ENC_UTF8;
|
||
rd_enc_t tmp_enc = RD_ENC_UTF8;
|
||
if (rd_src_txt_enc(x->src, &tmp_enc) == 0) x->enc = tmp_enc;
|
||
x->encname = fmt_encname(x->fmt, x->enc);
|
||
x->is_img = (x->fmt == RD_FMT_CBZ);
|
||
|
||
if (!x->is_img) {
|
||
if (rdft_init(&x->ft) != 0) goto close;
|
||
if (font_path && rdft_load_font(x->ft, x->font) != 0) { rdft_free(x->ft); x->ft = NULL; goto close; }
|
||
if (x->ft) rdft_set_px(x->ft, fs);
|
||
x->seg_cache_idx = -1;
|
||
/* 页索引缓存命中（书+字号+版面+编码+字体未变）→ 免整书重排，秒开；未命中 → 重排并落盘。 */
|
||
if (index_cache_load(x) != 1) {
|
||
if (build_index(x) != 0) goto close;
|
||
index_cache_save(x);
|
||
}
|
||
} else {
|
||
int pages = rd_src_pages(x->src);
|
||
x->npages = pages > 0 ? pages : 0;
|
||
}
|
||
x->cur = 0;
|
||
*b = x;
|
||
return 0;
|
||
close:
|
||
rd_book_close(x);
|
||
return -1;
|
||
}
|
||
|
||
void rd_book_close(rd_book *b)
|
||
{
|
||
if (!b) return;
|
||
free(b->segs);
|
||
free(b->pages);
|
||
free(b->seg_utf8);
|
||
free(b->seg_cps);
|
||
free(b->seg_lines);
|
||
free(b->seg_pages);
|
||
if (b->ft) rdft_free(b->ft);
|
||
if (b->src) rd_src_free(b->src);
|
||
free(b);
|
||
}
|
||
|
||
int rd_book_pages(rd_book *b) { return b ? b->npages : 0; }
|
||
int rd_book_current(rd_book *b) { return b ? b->cur : 0; }
|
||
int rd_book_font(rd_book *b) { return b ? b->fs : 0; }
|
||
int rd_book_ls(rd_book *b) { return b ? b->ls : 0; }
|
||
int rd_book_is_image(rd_book *b) { return b ? b->is_img : 0; }
|
||
const char *rd_book_encname(const rd_book *b) { return b ? (b->encname ? b->encname : "") : ""; }
|
||
rd_enc_t rd_book_enc_get(const rd_book *b) { return b ? b->enc : RD_ENC_UTF8; }
|
||
|
||
void rd_book_geom(rd_book *b, int *fs, int *ls, int *pw, int *ph, int *mx, int *my, int *top)
|
||
{
|
||
if (!b) return;
|
||
if (fs) *fs = b->fs;
|
||
if (ls) *ls = b->ls;
|
||
if (pw) *pw = b->pw;
|
||
if (ph) *ph = b->ph;
|
||
if (mx) *mx = b->mx;
|
||
if (my) *my = b->my;
|
||
if (top) *top = b->top;
|
||
}
|
||
const char *rd_book_basename(const rd_book *b) { return b ? b->base : ""; }
|
||
const char *rd_book_path(const rd_book *b) { return b ? b->path : ""; }
|
||
|
||
/* R3：TXT 编码切换——重开 src（带覆盖编码）、重建页索引、回锚当前页。非 TXT/CBZ 返回 -1。
|
||
* 事务式：先开新 src 成功才换（失败保留旧 src，书仍可用，返回负值）。 */
|
||
int rd_book_set_enc(rd_book *b, rd_enc_t enc)
|
||
{
|
||
if (!b || b->is_img || b->fmt != RD_FMT_TXT) return -1;
|
||
if (enc == b->enc) return b->cur; /* 同编码，无需重建 */
|
||
int seg; int32_t ch;
|
||
rd_book_anchor(b, &seg, &ch);
|
||
|
||
rd_src *ns = NULL;
|
||
if (rd_src_open_with_enc(&ns, b->path, &enc) != 0) return -2; /* 旧 src 未动 */
|
||
rd_src_free(b->src); b->src = ns; /* 换新 */
|
||
b->enc = enc;
|
||
b->encname = fmt_encname(b->fmt, b->enc);
|
||
|
||
/* 重建索引（复用现值 fs/ls/content_*），再回锚 */
|
||
free(b->segs); free(b->pages); b->segs = NULL; b->pages = NULL;
|
||
b->nsegs = b->npages = 0;
|
||
if (build_index(b) != 0) return -3; /* 新 src 有效但索引空 → 渲染返回 -1，安全降级 */
|
||
index_cache_save(b); /* 编码切换后重新落盘（键含 enc，与旧缓存并存不冲突） */
|
||
return rd_book_jump_to_anchor(b, seg, ch, b->fs, b->ls);
|
||
}
|
||
|
||
void rd_book_anchor(rd_book *b, int *seg, int32_t *ch)
|
||
{
|
||
if (!b || b->npages <= 0) { if (seg) *seg = 0; if (ch) *ch = 0; return; }
|
||
int p = b->cur < 0 ? 0 : (b->cur >= b->npages ? b->npages - 1 : b->cur);
|
||
if (seg) *seg = b->pages[p].seg;
|
||
if (ch) *ch = b->pages[p].seg_char;
|
||
}
|
||
|
||
int rd_book_turn(rd_book *b, int delta)
|
||
{
|
||
if (!b || b->npages <= 0) return 0;
|
||
int np = b->cur + delta;
|
||
if (np < 0) np = 0;
|
||
if (np >= b->npages) np = b->npages - 1;
|
||
b->cur = np;
|
||
return np;
|
||
}
|
||
|
||
int rd_book_set_page(rd_book *b, int page)
|
||
{
|
||
if (!b || b->npages <= 0) return 0;
|
||
if (page < 0) page = 0;
|
||
if (page >= b->npages) page = b->npages - 1;
|
||
b->cur = page;
|
||
return page;
|
||
}
|
||
|
||
/* ---- 文本页渲染（FreeType 字形 → 全屏 565） ---- */
|
||
static int render_text_page(rd_book *b, int page_no, uint16_t *out, int pitch, uint16_t bg565, uint16_t fg565)
|
||
{
|
||
int npix = b->pw * b->ph;
|
||
for (int i = 0; i < npix; i++) out[i] = bg565;
|
||
rd_book_page *pg = &b->pages[page_no];
|
||
int seg_idx = (int)pg->seg;
|
||
if (seg_idx < 0 || seg_idx >= b->nsegs) return -1;
|
||
if (load_seg(b, seg_idx) != 0) return -2;
|
||
int local_page = page_no - b->segs[seg_idx].page_start;
|
||
if (local_page < 0 || local_page >= b->seg_npages) return 1;
|
||
rd_page *pp = &b->seg_pages[local_page];
|
||
int asc = rdft_ascender(b->ft);
|
||
int screen_x0 = b->mx;
|
||
int screen_y0 = b->top;
|
||
for (int li = 0; li < pp->nlines; li++) {
|
||
rd_line *ln = &b->seg_lines[pp->first_line + li];
|
||
int pen = screen_x0 + ln->x;
|
||
int baseline = screen_y0 + ln->y + asc;
|
||
for (int32_t ci = ln->s; ci < ln->e; ci++) {
|
||
uint32_t cp = b->seg_cps[ci];
|
||
int adv = 0, bw = 0, bh = 0, left = 0, btop = 0;
|
||
const uint8_t *bmp = NULL;
|
||
rdft_glyph(b->ft, cp, &adv, &bmp, &bw, &bh, &left, &btop);
|
||
if (bmp && bw > 0)
|
||
rdft_blend565(out, pitch, b->pw, b->ph, pen, baseline, bmp, bw, bh, left, btop, fg565, bg565);
|
||
pen += adv;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* ---- CBZ 图片页渲染（rdimg 解码+降采样 → 内容区居中） ---- */
|
||
static int render_img_page(rd_book *b, int page_no, uint16_t *out, int pitch, uint16_t bg565)
|
||
{
|
||
int npix = b->pw * b->ph;
|
||
for (int i = 0; i < npix; i++) out[i] = bg565;
|
||
uint8_t *data = NULL; size_t size = 0;
|
||
if (rd_src_page(b->src, page_no, &data, &size) != 0) return -1;
|
||
uint16_t *scaled = NULL; int sw = 0, sh = 0;
|
||
if (rdimg_decode_scale(data, size, b->content_w, b->content_h, &scaled, &sw, &sh) != 0) {
|
||
free(data); return -2;
|
||
}
|
||
int x0 = b->mx + (b->content_w - sw) / 2;
|
||
int y0 = b->top + (b->content_h - sh) / 2;
|
||
int pitch_px = pitch / 2;
|
||
for (int y = 0; y < sh; y++) {
|
||
int ty = y0 + y; if (ty < 0 || ty >= b->ph) continue;
|
||
for (int x = 0; x < sw; x++) {
|
||
int tx = x0 + x; if (tx < 0 || tx >= b->pw) continue;
|
||
out[(size_t)ty * pitch_px + tx] = scaled[(size_t)y * sw + x];
|
||
}
|
||
}
|
||
free(scaled);
|
||
free(data);
|
||
return 0;
|
||
}
|
||
|
||
int rd_book_render(rd_book *b, int page_no, uint16_t *out, int pitch, uint16_t bg565, uint16_t fg565)
|
||
{
|
||
if (!b || !out || b->npages <= 0 || page_no < 0 || page_no >= b->npages) return -1;
|
||
if (b->is_img) return render_img_page(b, page_no, out, pitch, bg565);
|
||
return render_text_page(b, page_no, out, pitch, bg565, fg565);
|
||
}
|
||
|
||
/* ---- 重排 + 回锚 ---- */
|
||
int rd_book_set_size(rd_book *b, int fs, int ls)
|
||
{
|
||
if (!b) return -1;
|
||
if (b->is_img) { b->fs = fs; b->ls = ls; return 0; }
|
||
if (fs <= 0) fs = b->fs;
|
||
if (ls <= 0) ls = b->ls;
|
||
int anchor_seg, anchor_ch;
|
||
rd_book_anchor(b, &anchor_seg, &anchor_ch);
|
||
return rd_book_jump_to_anchor(b, anchor_seg, anchor_ch, fs, ls);
|
||
}
|
||
|
||
int rd_book_jump_to_anchor(rd_book *b, int seg, int32_t ch, int fs, int ls)
|
||
{
|
||
if (!b) return -1;
|
||
if (b->is_img) {
|
||
if (seg >= 0 && seg < b->npages) b->cur = seg;
|
||
return b->cur;
|
||
}
|
||
if (fs != b->fs || ls != b->ls) {
|
||
b->fs = fs; b->ls = ls;
|
||
b->content_w = b->pw - 2 * b->mx;
|
||
b->content_h = b->ph - b->top - b->my;
|
||
if (b->ft) rdft_set_px(b->ft, fs);
|
||
seg_t *nos = b->segs; int n_oldsegs = b->nsegs;
|
||
rd_book_page *nop = b->pages; int n_oldpages = b->npages;
|
||
b->segs = NULL; b->pages = NULL; b->nsegs = b->npages = 0;
|
||
if (build_index(b) != 0) { b->segs = nos; b->pages = nop; b->nsegs = n_oldsegs; b->npages = n_oldpages; return -5; }
|
||
free(nos); free(nop);
|
||
index_cache_save(b); /* 字号/行距改变后重新落盘（键含 fs/ls） */
|
||
}
|
||
int target = 0;
|
||
for (int p = 0; p < b->npages; p++) {
|
||
int ps = b->pages[p].seg;
|
||
if (ps < seg) { target = p + 1; continue; }
|
||
if (ps > seg) break;
|
||
if (b->pages[p].seg_char >= ch) { target = p; break; }
|
||
target = p;
|
||
}
|
||
if (target >= b->npages) target = b->npages - 1;
|
||
if (target < 0) target = 0;
|
||
b->cur = target;
|
||
return target;
|
||
}
|
||
|
||
/* ---- SDK 字库兜底（文本格式） ---- */
|
||
int rd_book_render_text(rd_book *b, int page_no, rd_book_line_fn fn, void *ctx)
|
||
{
|
||
if (!b || !fn || b->is_img || b->npages <= 0 || page_no < 0 || page_no >= b->npages) return -1;
|
||
rd_book_page *pg = &b->pages[page_no];
|
||
int seg_idx = (int)pg->seg;
|
||
if (seg_idx < 0 || seg_idx >= b->nsegs) return -1;
|
||
if (load_seg(b, seg_idx) != 0) return -2;
|
||
int local_page = page_no - b->segs[seg_idx].page_start;
|
||
if (local_page < 0 || local_page >= b->seg_npages) return 1;
|
||
rd_page *pp = &b->seg_pages[local_page];
|
||
uint8_t *line_utf8 = (uint8_t *)malloc((size_t)(b->content_w * 4 + 32));
|
||
if (!line_utf8) return -6;
|
||
for (int li = 0; li < pp->nlines; li++) {
|
||
rd_line *ln = &b->seg_lines[pp->first_line + li];
|
||
int x = b->mx + ln->x, y = b->top + ln->y;
|
||
size_t o = 0;
|
||
for (int32_t ci = ln->s; ci < ln->e; ci++) {
|
||
uint8_t tmp[4];
|
||
int n = rd_cp_to_utf8(b->seg_cps[ci], tmp);
|
||
memcpy(line_utf8 + o, tmp, (size_t)n); o += (size_t)n;
|
||
}
|
||
line_utf8[o] = 0;
|
||
fn(x, y, (const char *)line_utf8, (int)o, ctx);
|
||
}
|
||
free(line_utf8);
|
||
return 0;
|
||
}
|
||
|
||
/* ---- 目录（转 rd_src） ---- */
|
||
int rd_book_toc_n(const rd_book *b)
|
||
{
|
||
return (b && b->src && !b->is_img) ? rd_src_toc_n(b->src) : 0;
|
||
}
|
||
int rd_book_toc(const rd_book *b, int i, char *title, int tsz, int *seg, int32_t *ch)
|
||
{
|
||
if (!b || !b->src || b->is_img || !title) return -1;
|
||
rd_toc_entry t;
|
||
if (rd_src_toc(b->src, i, &t) != 0) return -1;
|
||
strncpy(title, t.title, (size_t)tsz - 1); title[tsz - 1] = 0;
|
||
if (seg) *seg = t.seg;
|
||
if (ch) *ch = t.ch;
|
||
return 0;
|
||
}
|