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pdfio/pdfio-content.h
Michael R Sweet 3e0507ba6c
Rework pdfioFileCreateImageObjFromData to have a separate alpha argument so 
that CMYK images can be supported.

Add unit tests.
2021-07-18 09:23:39 -04:00

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//
// Public content header file for PDFio.
//
// Copyright © 2021 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
#ifndef PDFIO_CONTENT_H
# define PDFIO_CONTENT_H
//
// Include necessary headers...
//
# include "pdfio.h"
//
// C++ magic...
//
# ifdef __cplusplus
extern "C" {
# endif // __cplusplus
//
// Types and constants...
//
typedef enum pdfio_linecap_e // Line capping modes
{
PDFIO_LINECAP_BUTT, // Butt ends
PDFIO_LINECAP_ROUND, // Round ends
PDFIO_LINECAP_SQUARE // Square ends
} pdfio_linecap_t;
typedef enum pdfio_linejoin_e // Line joining modes
{
PDFIO_LINEJOIN_MITER, // Miter joint
PDFIO_LINEJOIN_ROUND, // Round joint
PDFIO_LINEJOIN_BEVEL // Bevel joint
} pdfio_linejoin_t;
typedef double pdfio_matrix_t[3][2]; // Transform matrix
typedef enum pdfio_textrendering_e // Text rendering modes
{
PDFIO_TEXTRENDERING_FILL, // Fill text
PDFIO_TEXTRENDERING_STROKE, // Stroke text
PDFIO_TEXTRENDERING_FILL_AND_STROKE, // Fill then stroke text
PDFIO_TEXTRENDERING_INVISIBLE, // Don't fill or stroke (invisible)
PDFIO_TEXTRENDERING_FILL_PATH, // Fill text and add to path
PDFIO_TEXTRENDERING_STROKE_PATH, // Stroke text and add to path
PDFIO_TEXTRENDERING_FILL_AND_STROKE_PATH,
// Fill then stroke text and add to path
PDFIO_TEXTRENDERING_TEXT_PATH // Add text to path (invisible)
} pdfio_textrendering_t;
extern const double pdfioAdobeRGBGamma PDFIO_PUBLIC;
// AdobeRGB gamma
extern const double pdfioAdobeRGBMatrix[3][3] PDFIO_PUBLIC;
// AdobeRGB matrix
extern const double pdfioAdobeRGBWhitePoint[3] PDFIO_PUBLIC;
// AdobeRGB white point
extern const double pdfioDisplayP3Gamma PDFIO_PUBLIC;
// Display P3 gamma
extern const double pdfioDisplayP3Matrix[3][3] PDFIO_PUBLIC;
// Display P3 matrix
extern const double pdfioDisplayP3WhitePoint[3] PDFIO_PUBLIC;
// Display P3 white point
extern const double pdfioSRGBGamma PDFIO_PUBLIC;
// sRGB gamma
extern const double pdfioSRGBMatrix[3][3] PDFIO_PUBLIC;
// sRGB matrix
extern const double pdfioSRGBWhitePoint[3] PDFIO_PUBLIC;
// sRGB white point
//
// Functions...
//
// Color array functions...
extern pdfio_array_t *pdfioArrayCreateColorFromICCObj(pdfio_file_t *pdf, pdfio_obj_t *icc_object) PDFIO_PUBLIC;
extern pdfio_array_t *pdfioArrayCreateColorFromMatrix(pdfio_file_t *pdf, size_t num_colors, double gamma, const double matrix[3][3], const double white_point[3]) PDFIO_PUBLIC;
extern pdfio_array_t *pdfioArrayCreateColorFromPalette(pdfio_file_t *pdf, size_t num_colors, const unsigned char *colors) PDFIO_PUBLIC;
extern pdfio_array_t *pdfioArrayCreateColorFromPrimaries(pdfio_file_t *pdf, size_t num_colors, double gamma, double wx, double wy, double rx, double ry, double gx, double gy, double bx, double by) PDFIO_PUBLIC;
// PDF content drawing functions...
extern bool pdfioContentClip(pdfio_stream_t *st, bool even_odd) PDFIO_PUBLIC;
extern bool pdfioContentDrawImage(pdfio_stream_t *st, const char *name, double x, double y, double w, double h) PDFIO_PUBLIC;
extern bool pdfioContentFill(pdfio_stream_t *st, bool even_odd) PDFIO_PUBLIC;
extern bool pdfioContentFillAndStroke(pdfio_stream_t *st, bool even_odd) PDFIO_PUBLIC;
extern bool pdfioContentMatrixConcat(pdfio_stream_t *st, pdfio_matrix_t m) PDFIO_PUBLIC;
extern bool pdfioContentMatrixRotate(pdfio_stream_t *st, double degrees) PDFIO_PUBLIC;
extern bool pdfioContentMatrixScale(pdfio_stream_t *st, double sx, double sy) PDFIO_PUBLIC;
extern bool pdfioContentMatrixTranslate(pdfio_stream_t *st, double tx, double ty) PDFIO_PUBLIC;
extern bool pdfioContentPathClose(pdfio_stream_t *st) PDFIO_PUBLIC;
extern bool pdfioContentPathCurve(pdfio_stream_t *st, double x1, double y1, double x2, double y2, double x3, double y3) PDFIO_PUBLIC;
extern bool pdfioContentPathCurve13(pdfio_stream_t *st, double x1, double y1, double x3, double y3) PDFIO_PUBLIC;
extern bool pdfioContentPathCurve23(pdfio_stream_t *st, double x2, double y2, double x3, double y3) PDFIO_PUBLIC;
extern bool pdfioContentPathLineTo(pdfio_stream_t *st, double x, double y) PDFIO_PUBLIC;
extern bool pdfioContentPathMoveTo(pdfio_stream_t *st, double x, double y) PDFIO_PUBLIC;
extern bool pdfioContentPathRect(pdfio_stream_t *st, double x, double y, double width, double height) PDFIO_PUBLIC;
extern bool pdfioContentRestore(pdfio_stream_t *st) PDFIO_PUBLIC;
extern bool pdfioContentSave(pdfio_stream_t *st) PDFIO_PUBLIC;
extern bool pdfioContentSetDashPattern(pdfio_stream_t *st, int phase, int on, int off) PDFIO_PUBLIC;
extern bool pdfioContentSetFillColorDeviceCMYK(pdfio_stream_t *st, double c, double m, double y, double k) PDFIO_PUBLIC;
extern bool pdfioContentSetFillColorDeviceGray(pdfio_stream_t *st, double g) PDFIO_PUBLIC;
extern bool pdfioContentSetFillColorDeviceRGB(pdfio_stream_t *st, double r, double g, double b) PDFIO_PUBLIC;
extern bool pdfioContentSetFillColorGray(pdfio_stream_t *st, double g) PDFIO_PUBLIC;
extern bool pdfioContentSetFillColorRGB(pdfio_stream_t *st, double r, double g, double b) PDFIO_PUBLIC;
extern bool pdfioContentSetFillColorSpace(pdfio_stream_t *st, const char *name) PDFIO_PUBLIC;
extern bool pdfioContentSetFlatness(pdfio_stream_t *st, double f) PDFIO_PUBLIC;
extern bool pdfioContentSetLineCap(pdfio_stream_t *st, pdfio_linecap_t lc) PDFIO_PUBLIC;
extern bool pdfioContentSetLineJoin(pdfio_stream_t *st, pdfio_linejoin_t lj) PDFIO_PUBLIC;
extern bool pdfioContentSetLineWidth(pdfio_stream_t *st, double width) PDFIO_PUBLIC;
extern bool pdfioContentSetMiterLimit(pdfio_stream_t *st, double limit) PDFIO_PUBLIC;
extern bool pdfioContentSetStrokeColorDeviceCMYK(pdfio_stream_t *st, double c, double m, double y, double k) PDFIO_PUBLIC;
extern bool pdfioContentSetStrokeColorDeviceGray(pdfio_stream_t *st, double g) PDFIO_PUBLIC;
extern bool pdfioContentSetStrokeColorDeviceRGB(pdfio_stream_t *st, double r, double g, double b) PDFIO_PUBLIC;
extern bool pdfioContentSetStrokeColorGray(pdfio_stream_t *st, double g) PDFIO_PUBLIC;
extern bool pdfioContentSetStrokeColorRGB(pdfio_stream_t *st, double r, double g, double b) PDFIO_PUBLIC;
extern bool pdfioContentSetStrokeColorSpace(pdfio_stream_t *st, const char *name) PDFIO_PUBLIC;
extern bool pdfioContentSetTextCharacterSpacing(pdfio_stream_t *st, double spacing) PDFIO_PUBLIC;
extern bool pdfioContentSetTextFont(pdfio_stream_t *st, const char *name, double size) PDFIO_PUBLIC;
extern bool pdfioContentSetTextLeading(pdfio_stream_t *st, double leading) PDFIO_PUBLIC;
extern bool pdfioContentSetTextMatrix(pdfio_stream_t *st, pdfio_matrix_t m) PDFIO_PUBLIC;
extern bool pdfioContentSetTextRenderingMode(pdfio_stream_t *st, pdfio_textrendering_t mode) PDFIO_PUBLIC;
extern bool pdfioContentSetTextRise(pdfio_stream_t *st, double rise) PDFIO_PUBLIC;
extern bool pdfioContentSetTextWordSpacing(pdfio_stream_t *st, double spacing) PDFIO_PUBLIC;
extern bool pdfioContentSetTextXScaling(pdfio_stream_t *st, double percent) PDFIO_PUBLIC;
extern bool pdfioContentStroke(pdfio_stream_t *st) PDFIO_PUBLIC;
extern bool pdfioContentTextBegin(pdfio_stream_t *st) PDFIO_PUBLIC;
extern bool pdfioContentTextEnd(pdfio_stream_t *st) PDFIO_PUBLIC;
extern bool pdfioContentTextMoveLine(pdfio_stream_t *st, double tx, double ty) PDFIO_PUBLIC;
extern bool pdfioContentTextMoveTo(pdfio_stream_t *st, double tx, double ty) PDFIO_PUBLIC;
extern bool pdfioContentTextNextLine(pdfio_stream_t *st) PDFIO_PUBLIC;
extern bool pdfioContentTextShow(pdfio_stream_t *st, bool unicode, const char *s) PDFIO_PUBLIC;
extern bool pdfioContentTextShowf(pdfio_stream_t *st, bool unicode, const char *format, ...) PDFIO_PUBLIC PDFIO_FORMAT(3,4);
extern bool pdfioContentTextShowJustified(pdfio_stream_t *st, bool unicode, size_t num_fragments, const double *offsets, const char * const *fragments) PDFIO_PUBLIC;
// Resource helpers...
extern pdfio_obj_t *pdfioFileCreateFontObjFromBase(pdfio_file_t *pdf, const char *name) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileCreateFontObjFromFile(pdfio_file_t *pdf, const char *filename, bool unicode) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileCreateICCObjFromFile(pdfio_file_t *pdf, const char *filename, size_t num_colors) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileCreateImageObjFromData(pdfio_file_t *pdf, const unsigned char *data, size_t width, size_t height, size_t num_colors, pdfio_array_t *color_data, bool alpha, bool interpolate) PDFIO_PUBLIC;
extern pdfio_obj_t *pdfioFileCreateImageObjFromFile(pdfio_file_t *pdf, const char *filename, bool interpolate) PDFIO_PUBLIC;
// Image object helpers...
extern size_t pdfioImageGetBytesPerLine(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern double pdfioImageGetHeight(pdfio_obj_t *obj) PDFIO_PUBLIC;
extern double pdfioImageGetWidth(pdfio_obj_t *obj) PDFIO_PUBLIC;
// Page dictionary helpers...
extern bool pdfioPageDictAddColorSpace(pdfio_dict_t *dict, const char *name, pdfio_array_t *data) PDFIO_PUBLIC;
extern bool pdfioPageDictAddFont(pdfio_dict_t *dict, const char *name, pdfio_obj_t *obj) PDFIO_PUBLIC;
extern bool pdfioPageDictAddImage(pdfio_dict_t *dict, const char *name, pdfio_obj_t *obj) PDFIO_PUBLIC;
//
// C++ magic...
//
# ifdef __cplusplus
}
# endif // __cplusplus
#endif // !PDFIO_CONTENT_H
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