dany/pdfio
1
0
Fork 0
mirror of https://github.com/michaelrsweet/pdfio.git synced 2025-07-15 21:40:11 +02:00
Code Issues Packages Projects Releases Wiki Activity

Safe work on streams - still need to implement predictors

Browse Source
This commit is contained in:
Michael R Sweet
2021-05-07 08:47:49 -04:00
parent c61d6ad686
commit 44325ce2d9
5 changed files with 355 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
pdfio-private.h
View File

@ -69,6 +69,17 @@ typedef enum _pdfio_mode_e // Read/write mode
_PDFIO_MODE_WRITE // Write a PDF file
} _pdfio_mode_t;
typedef enum _pdfio_predictor_e // PNG predictor constants
{
_PDFIO_PREDICTOR_NONE = 1, // No predictor (default)
_PDFIO_PREDICTOR_TIFF2 = 2, // TIFF2 predictor (???)
_PDFIO_PREDICTOR_PNG_NONE = 10, // PNG None predictor (same as `_PDFIO_PREDICTOR_NONE`)
_PDFIO_PREDICTOR_PNG_SUB = 11, // PNG Sub predictor
_PDFIO_PREDICTOR_PNG_UP = 12, // PNG Up predictor
_PDFIO_PREDICTOR_PNG_AVERAGE = 13, // PNG Average predictor
_PDFIO_PREDICTOR_PNG_PAETH = 14 // PNG Paeth predictor
} _pdfio_predictor_t;
typedef struct _pdfio_value_s // Value structure
{
pdfio_valtype_t type; // Type of value
@ -174,9 +185,12 @@ struct _pdfio_stream_s // Stream
pdfio_file_t *pdf; // PDF file
pdfio_obj_t *obj; // Object
pdfio_filter_t filter; // Compression/decompression filter
char buffer[8192]; // Read/write buffer
size_t bufused; // Number of bytes in buffer
size_t remaining; // Remaining bytes in stream
char buffer[8192], // Read/write buffer
*bufptr, // Current position in buffer
*bufend; // End of buffer
z_stream flate; // Flate filter state
char cbuffer[4096]; // Compressed data buffer
};
typedef ssize_t (*_pdfio_tconsume_cb_t)(void *data, size_t bytes);