diff options
Diffstat (limited to 'source')
| -rw-r--r-- | source/fitz/path.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/source/fitz/path.c b/source/fitz/path.c index 5481a90d..fbc5ef47 100644 --- a/source/fitz/path.c +++ b/source/fitz/path.c @@ -1520,3 +1520,127 @@ fz_unshare_stroke_state(fz_context *ctx, fz_stroke_state *shared) { return fz_unshare_stroke_state_with_dash_len(ctx, shared, shared->dash_len); } + +static void * +clone_block(fz_context *ctx, void *block, size_t len) +{ + void *target; + + if (len == 0 || block == NULL) + return NULL; + + target = fz_malloc(ctx, len); + memcpy(target, block, len); + return target; +} + +fz_path * +fz_clone_path(fz_context *ctx, fz_path *path) +{ + fz_path *new_path; + + assert(ctx != NULL); + + if (ctx == NULL || path == NULL) + return NULL; + + new_path = fz_malloc_struct(ctx, fz_path); + new_path->refs = 1; + new_path->packed = FZ_PATH_UNPACKED; + fz_try(ctx) + { + switch(path->packed) + { + case FZ_PATH_UNPACKED: + case FZ_PATH_PACKED_OPEN: + new_path->cmd_len = path->cmd_len; + new_path->cmd_cap = path->cmd_cap; + new_path->cmds = clone_block(ctx, path->cmds, path->cmd_cap); + new_path->coord_len = path->coord_len; + new_path->coord_cap = path->coord_cap; + new_path->coords = clone_block(ctx, path->coords, sizeof(float)*path->coord_cap); + new_path->current = path->current; + new_path->begin = path->begin; + break; + case FZ_PATH_PACKED_FLAT: + { + uint8_t *data; + float *xy; + int i; + fz_packed_path *ppath = (fz_packed_path *)path; + + new_path->cmd_len = ppath->cmd_len; + new_path->cmd_cap = ppath->cmd_len; + new_path->coord_len = ppath->coord_len; + new_path->coord_cap = ppath->coord_len; + data = (uint8_t *)&ppath[1]; + new_path->coords = clone_block(ctx, data, sizeof(float)*path->coord_cap); + data += sizeof(float) * path->coord_cap; + new_path->cmds = clone_block(ctx, data, path->cmd_cap); + xy = new_path->coords; + for (i = 0; i < new_path->cmd_len; i++) + { + switch (new_path->cmds[i]) + { + case FZ_MOVETOCLOSE: + case FZ_MOVETO: + new_path->current.x = *xy++; + new_path->current.y = *xy++; + new_path->begin.x = new_path->current.x; + new_path->begin.y = new_path->current.y; + break; + case FZ_CURVETO: + xy += 2; + /* fallthrough */ + case FZ_CURVETOV: + case FZ_CURVETOY: + case FZ_QUADTO: + /* fallthrough */ + xy += 2; + case FZ_LINETO: + new_path->current.x = *xy++; + new_path->current.y = *xy++; + break; + case FZ_DEGENLINETO: + break; + case FZ_HORIZTO: + new_path->current.x = *xy++; + break; + case FZ_VERTTO: + new_path->current.y = *xy++; + break; + case FZ_RECTTO: + xy += 2; + break; + case FZ_CURVETOCLOSE: + xy += 2; + /* fallthrough */ + case FZ_CURVETOVCLOSE: + case FZ_CURVETOYCLOSE: + case FZ_QUADTOCLOSE: + case FZ_LINETOCLOSE: + xy++; + /* fallthrough */ + case FZ_HORIZTOCLOSE: + case FZ_VERTTOCLOSE: + xy++; + /* fallthrough */ + case FZ_DEGENLINETOCLOSE: + new_path->current.x = new_path->begin.x; + new_path->current.y = new_path->begin.y; + break; + } + } + } + default: + fz_throw(ctx, FZ_ERROR_GENERIC, "Unknown packing method found in path"); + } + } + fz_catch(ctx) + { + fz_free(ctx, new_path->cmds); + fz_free(ctx, new_path); + fz_rethrow(ctx); + } + return new_path; +} |