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pdfio-content.c
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pdfio-content.c
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//
// Content helper functions for PDFio.
//
// Copyright © 2021-2023 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
#include "pdfio-private.h"
#include "pdfio-content.h"
#include "ttf.h"
#include <math.h>
#ifndef M_PI
# define M_PI 3.14159265358979323846264338327950288
#endif // M_PI
//
// Local constants...
//
#define _PDFIO_PNG_CHUNK_IDAT 0x49444154 // Image data
#define _PDFIO_PNG_CHUNK_IEND 0x49454e44 // Image end
#define _PDFIO_PNG_CHUNK_IHDR 0x49484452 // Image header
#define _PDFIO_PNG_CHUNK_PLTE 0x504c5445 // Palette
#define _PDFIO_PNG_CHUNK_cHRM 0x6348524d // Cromacities and white point
#define _PDFIO_PNG_CHUNK_gAMA 0x67414d41 // Gamma correction
#define _PDFIO_PNG_CHUNK_tRNS 0x74524e53 // Transparency information
#define _PDFIO_PNG_TYPE_GRAY 0 // Grayscale
#define _PDFIO_PNG_TYPE_RGB 2 // RGB
#define _PDFIO_PNG_TYPE_INDEXED 3 // Indexed
#define _PDFIO_PNG_TYPE_GRAYA 4 // Grayscale + alpha
#define _PDFIO_PNG_TYPE_RGBA 6 // RGB + alpha
static int _pdfio_cp1252[] = // CP1252-specific character mapping
{
0x20AC,
0x0000,
0x201A,
0x0192,
0x201E,
0x2026,
0x2020,
0x2021,
0x02C6,
0x2030,
0x0160,
0x2039,
0x0152,
0x0000,
0x017D,
0x0000,
0x0000,
0x2018,
0x2019,
0x201C,
0x201D,
0x2022,
0x2013,
0x2014,
0x02DC,
0x2122,
0x0161,
0x203A,
0x0153,
0x0000,
0x017E,
0x0178
};
//
// Local types...
//
typedef pdfio_obj_t *(*_pdfio_image_func_t)(pdfio_dict_t *dict, int fd);
//
// Local functions...
//
static pdfio_obj_t *copy_jpeg(pdfio_dict_t *dict, int fd);
static pdfio_obj_t *copy_png(pdfio_dict_t *dict, int fd);
static bool create_cp1252(pdfio_file_t *pdf);
static void ttf_error_cb(pdfio_file_t *pdf, const char *message);
static unsigned update_png_crc(unsigned crc, const unsigned char *buffer, size_t length);
static bool write_string(pdfio_stream_t *st, bool unicode, const char *s, bool *newline);
//
// Local globals...
//
static unsigned png_crc_table[256] = // CRC-32 table for PNG files
{
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};
//
// 'pdfioArrayCreateColorFromICCObj()' - Create an ICC-based color space array.
//
pdfio_array_t * // O - Color array
pdfioArrayCreateColorFromICCObj(
pdfio_file_t *pdf, // I - PDF file
pdfio_obj_t *icc_object) // I - ICC profile object
{
pdfio_array_t *icc_color; // Color array
// Range check input...
if (!pdf || !icc_object)
return (NULL);
// Create the array with two values - a name and an object reference...
if ((icc_color = pdfioArrayCreate(pdf)) == NULL)
return (NULL);
pdfioArrayAppendName(icc_color, "ICCBased");
pdfioArrayAppendObj(icc_color, icc_object);
return (icc_color);
}
//
// 'pdfioArrayCreateColorFromMatrix()' - Create a calibrated color space array using a CIE XYZ transform matrix.
//
pdfio_array_t * // O - Color space array
pdfioArrayCreateColorFromMatrix(
pdfio_file_t *pdf, // I - PDF file
size_t num_colors, // I - Number of colors (1 or 3)
double gamma, // I - Gamma value
const double matrix[3][3], // I - XYZ transform
const double white_point[3]) // I - White point
{
size_t i; // Looping var
pdfio_array_t *calcolor; // Array to hold calibrated color space
pdfio_dict_t *dict; // Dictionary to hold color values
pdfio_array_t *value; // Value for white point, matrix, and gamma
// Range check input...
if (!pdf || (num_colors != 1 && num_colors != 3) || gamma <= 0.0)
return (NULL);
// Create the array with two values - a name and a dictionary...
if ((calcolor = pdfioArrayCreate(pdf)) == NULL)
return (NULL);
if (num_colors == 1)
pdfioArrayAppendName(calcolor, "CalGray");
else
pdfioArrayAppendName(calcolor, "CalRGB");
if ((dict = pdfioDictCreate(pdf)) == NULL)
return (NULL);
pdfioArrayAppendDict(calcolor, dict);
// Then add the values...
if (num_colors == 1)
{
pdfioDictSetNumber(dict, "Gamma", gamma);
}
else
{
if ((value = pdfioArrayCreate(pdf)) == NULL)
return (NULL);
for (i = 0; i < num_colors; i ++)
pdfioArrayAppendNumber(value, gamma);
pdfioDictSetArray(dict, "Gamma", value);
}
if (white_point)
{
if ((value = pdfioArrayCreate(pdf)) == NULL)
return (NULL);
pdfioArrayAppendNumber(value, white_point[0]);
pdfioArrayAppendNumber(value, white_point[1]);
pdfioArrayAppendNumber(value, white_point[2]);
pdfioDictSetArray(dict, "WhitePoint", value);
}
if (num_colors > 1 && matrix)
{
if ((value = pdfioArrayCreate(pdf)) == NULL)
return (NULL);
pdfioArrayAppendNumber(value, matrix[0][0]);
pdfioArrayAppendNumber(value, matrix[1][0]);
pdfioArrayAppendNumber(value, matrix[2][0]);
pdfioArrayAppendNumber(value, matrix[0][1]);
pdfioArrayAppendNumber(value, matrix[1][1]);
pdfioArrayAppendNumber(value, matrix[2][1]);
pdfioArrayAppendNumber(value, matrix[0][2]);
pdfioArrayAppendNumber(value, matrix[1][2]);
pdfioArrayAppendNumber(value, matrix[2][2]);
pdfioDictSetArray(dict, "Matrix", value);
}
return (calcolor);
}
//
// 'pdfioArrayCreateColorFromPalette()' - Create an indexed color space array.
//
pdfio_array_t * // O - Color array
pdfioArrayCreateColorFromPalette(
pdfio_file_t *pdf, // I - PDF file
size_t num_colors, // I - Number of colors
const unsigned char *colors) // I - RGB values for colors
{
pdfio_array_t *indexed_color; // Color array
// Range check input...
if (!pdf || num_colors < 1 || !colors)
return (NULL);
// Create the array with four values...
if ((indexed_color = pdfioArrayCreate(pdf)) == NULL)
return (NULL);
pdfioArrayAppendName(indexed_color, "Indexed");
pdfioArrayAppendName(indexed_color, "DeviceRGB");
pdfioArrayAppendNumber(indexed_color, num_colors - 1);
pdfioArrayAppendBinary(indexed_color, colors, num_colors * 3);
return (indexed_color);
}
//
// 'pdfioArrayCreateColorFromPrimaries()' - Create a calibrated color sapce array using CIE xy primary chromacities.
//
pdfio_array_t * // O - Color space array
pdfioArrayCreateColorFromPrimaries(
pdfio_file_t *pdf, // I - PDF file
size_t num_colors, // I - Number of colors (1 or 3)
double gamma, // I - Gama value
double wx, // I - White point X chromacity
double wy, // I - White point Y chromacity
double rx, // I - Red X chromacity
double ry, // I - Red Y chromacity
double gx, // I - Green X chromacity
double gy, // I - Green Y chromacity
double bx, // I - Blue X chromacity
double by) // I - Blue Y chromacity
{
double z; // Intermediate value
double Xa, Xb, Xc, // Transform values
Ya, Yb, Yc,
Za, Zb, Zc;
double white_point[3]; // White point CIE XYZ value
double matrix[3][3]; // CIE XYZ transform matrix
PDFIO_DEBUG("pdfioFileCreateCalibratedColorFromPrimaries(pdf=%p, num_colors=%lu, gamma=%g, wx=%g, wy=%g, rx=%g, ry=%g, gx=%g, gy=%g, bx=%g, by=%g)\n", pdf, (unsigned long)num_colors, gamma, wx, wy, rx, ry, gx, gy, bx, by);
// Range check input...
if (!pdf || (num_colors != 1 && num_colors != 3) || gamma <= 0.0 || ry == 0.0 || gy == 0.0 || by == 0.0)
return (NULL);
// Calculate the white point and transform matrix per the PDF spec...
z = wy * ((gx - bx) * ry - (rx - bx) * gy + (rx - gx) * by);
if (z == 0.0)
return (NULL); // Undefined
Ya = ry * ((gx - bx) * wy - (wx - bx) * gy + (wx - gx) * by) / z;
Xa = Ya * rx / ry;
Za = Ya * ((1.0 - rx) / ry - 1.0);
Yb = gy * ((rx - bx) * wy - (wx - bx) * ry + (wx - rx) * by) / z;
Xb = Yb * gx / gy;
Zb = Yb * ((1.0 - gx) / gy - 1.0);
Yc = gy * ((rx - gx) * wy - (wx - gx) * ry + (wx - rx) * gy) / z;
Xc = Yc * bx / by;
Zc = Yc * ((1.0 - bx) / by - 1.0);
white_point[0] = Xa + Xb + Xc;
white_point[1] = Ya + Yb + Yc;
white_point[2] = Za + Zb + Zc;
matrix[0][0] = Xa;
matrix[0][1] = Ya;
matrix[0][2] = Za;
matrix[1][0] = Xb;
matrix[1][1] = Yb;
matrix[1][2] = Zb;
matrix[2][0] = Xc;
matrix[2][1] = Yc;
matrix[2][2] = Zc;
PDFIO_DEBUG("pdfioFileCreateCalibratedColorFromPrimaries: white_point=[%g %g %g]\n", white_point[0], white_point[1], white_point[2]);
PDFIO_DEBUG("pdfioFileCreateCalibratedColorFromPrimaries: matrix=[%g %g %g %g %g %g %g %g %g]\n", matrix[0][0], matrix[1][0], matrix[2][0], matrix[0][1], matrix[1][1], matrix[2][2], matrix[0][2], matrix[1][2], matrix[2][1]);
// Now that we have the white point and matrix, use those to make the color array...
return (pdfioArrayCreateColorFromMatrix(pdf, num_colors, gamma, matrix, white_point));
}
//
// 'pdfioArrayCreateColorFromStandard()' - Create a color array for a standard color space.
//
// This function creates a color array for a standard `PDFIO_CS_` enumerated color space.
// The "num_colors" argument must be `1` for grayscale and `3` for RGB color.
//
pdfio_array_t * // O - Color array
pdfioArrayCreateColorFromStandard(
pdfio_file_t *pdf, // I - PDF file
size_t num_colors, // I - Number of colors (1 or 3)
pdfio_cs_t cs) // I - Color space enumeration
{
static const double adobe_matrix[3][3] = { { 0.57667, 0.18556, 0.18823 }, { 0.29734, 0.62736, 0.07529 }, { 0.02703, 0.07069, 0.99134 } };
static const double d65_white_point[3] = { 0.9505, 1.0, 1.0890 };
static const double p3_d65_matrix[3][3] = { { 0.48657, 0.26567, 0.19822 }, { 0.22897, 0.69174, 0.07929 }, { 0.00000, 0.04511, 1.04394 } };
static const double srgb_matrix[3][3] = { { 0.4124, 0.3576, 0.1805 }, { 0.2126, 0.7152, 0.0722 }, { 0.0193, 0.1192, 0.9505 } };
// Range check input...
if (!pdf)
{
return (NULL);
}
else if (num_colors != 1 && num_colors != 3)
{
_pdfioFileError(pdf, "Unsupported number of colors %u.", (unsigned)num_colors);
return (NULL);
}
switch (cs)
{
case PDFIO_CS_ADOBE :
return (pdfioArrayCreateColorFromMatrix(pdf, num_colors, 2.2, adobe_matrix, d65_white_point));
case PDFIO_CS_P3_D65 :
return (pdfioArrayCreateColorFromMatrix(pdf, num_colors, 2.2, p3_d65_matrix, d65_white_point));
case PDFIO_CS_SRGB :
return (pdfioArrayCreateColorFromMatrix(pdf, num_colors, 2.2, srgb_matrix, d65_white_point));
default :
_pdfioFileError(pdf, "Unsupported color space number %d.", (int)cs);
return (NULL);
}
}
//
// 'pdfioContentClip()' - Clip output to the current path.
//
bool // O - `true` on success, `false` on failure
pdfioContentClip(
pdfio_stream_t *st, // I - Stream
bool even_odd) // I - Even/odd fill vs. non-zero winding rule
{
return (pdfioStreamPuts(st, even_odd ? "W*\n" : "W\n"));
}
//
// 'pdfioContentDrawImage()' - Draw an image object.
//
// The object name must be part of the page dictionary resources, typically
// using the @link pdfioPageDictAddImage@ function.
//
bool // O - `true` on success, `false` on failure
pdfioContentDrawImage(
pdfio_stream_t *st, // I - Stream
const char *name, // I - Image name
double x, // I - X offset of image
double y, // I - Y offset of image
double width, // I - Width of image
double height) // I - Height of image
{
return (pdfioStreamPrintf(st, "q %g 0 0 %g %g %g cm/%s Do Q\n", width, height, x, y, name));
}
//
// 'pdfioContentFill()' - Fill the current path.
//
bool // O - `true` on success, `false` on failure
pdfioContentFill(
pdfio_stream_t *st, // I - Stream
bool even_odd) // I - Even/odd fill vs. non-zero winding rule
{
return (pdfioStreamPuts(st, even_odd ? "f*\n" : "f\n"));
}
//
// 'pdfioContentFillAndStroke()' - Fill and stroke the current path.
//
bool // O - `true` on success, `false` on failure
pdfioContentFillAndStroke(
pdfio_stream_t *st, // I - Stream
bool even_odd) // I - Even/odd fill vs. non-zero winding
{
return (pdfioStreamPuts(st, even_odd ? "B*\n" : "B\n"));
}
//
// 'pdfioContentMatrixConcat()' - Concatenate a matrix to the current graphics
// state.
//
bool // O - `true` on success, `false` on failure
pdfioContentMatrixConcat(
pdfio_stream_t *st, // I - Stream
pdfio_matrix_t m) // I - Transform matrix
{
return (pdfioStreamPrintf(st, "%g %g %g %g %g %g cm\n", m[0][0], m[0][1], m[1][0], m[1][1], m[2][0], m[2][1]));
}
//
// 'pdfioContentMatrixRotate()' - Rotate the current transform matrix.
//
bool // O - `true` on success, `false` on failure
pdfioContentMatrixRotate(
pdfio_stream_t *st, // I - Stream
double degrees) // I - Rotation angle in degrees counter-clockwise
{
double dcos = cos(M_PI * degrees / 180.0);
// Cosine
double dsin = sin(M_PI * degrees / 180.0);
// Sine
return (pdfioStreamPrintf(st, "%g %g %g %g 0 0 cm\n", dcos, -dsin, dsin, dcos));
}
//
// 'pdfioContentMatrixScale()' - Scale the current transform matrix.
//
bool // O - `true` on success, `false` on failure
pdfioContentMatrixScale(
pdfio_stream_t *st, // I - Stream
double sx, // I - X scale
double sy) // I - Y scale
{
return (pdfioStreamPrintf(st, "%g 0 0 %g 0 0 cm\n", sx, sy));
}
//
// 'pdfioContentMatrixTranslate()' - Translate the current transform matrix.
//
bool // O - `true` on success, `false` on failure
pdfioContentMatrixTranslate(
pdfio_stream_t *st, // I - Stream
double tx, // I - X offset
double ty) // I - Y offset
{
return (pdfioStreamPrintf(st, "1 0 0 1 %g %g cm\n", tx, ty));
}
//
// 'pdfioContentPathClose()' - Close the current path.
//
bool // O - `true` on success, `false` on failure
pdfioContentPathClose(
pdfio_stream_t *st) // I - Stream
{
return (pdfioStreamPuts(st, "h\n"));
}
//
// 'pdfioContentPathCurve()' - Add a Bezier curve with two control points.
//
bool // O - `true` on success, `false` on failure
pdfioContentPathCurve(
pdfio_stream_t *st, // I - Stream
double x1, // I - X position 1
double y1, // I - Y position 1
double x2, // I - X position 2
double y2, // I - Y position 2
double x3, // I - X position 3
double y3) // I - Y position 3
{
return (pdfioStreamPrintf(st, "%g %g %g %g %g %g c\n", x1, y1, x2, y2, x3, y3));
}
//
// 'pdfioContentPathCurve13()' - Add a Bezier curve with an initial control point.
//
bool // O - `true` on success, `false` on failure
pdfioContentPathCurve13(
pdfio_stream_t *st, // I - Stream
double x1, // I - X position 1
double y1, // I - Y position 1
double x3, // I - X position 3
double y3) // I - Y position 3
{
return (pdfioStreamPrintf(st, "%g %g %g %g v\n", x1, y1, x3, y3));
}
//
// 'pdfioContentPathCurve23()' - Add a Bezier curve with a trailing control point.
//
bool // O - `true` on success, `false` on failure
pdfioContentPathCurve23(
pdfio_stream_t *st, // I - Stream
double x2, // I - X position 2
double y2, // I - Y position 2
double x3, // I - X position 3
double y3) // I - Y position 3
{
return (pdfioStreamPrintf(st, "%g %g %g %g y\n", x2, y2, x3, y3));
}
//
// 'pdfioContentPathEnd()' - Clear the current path.
//
bool // O - `true` on success, `false` on failure
pdfioContentPathEnd(pdfio_stream_t *st) // I - Stream
{
return (pdfioStreamPuts(st, "n\n"));
}
//
// 'pdfioContentPathLineTo()' - Add a straight line to the current path.
//
bool // O - `true` on success, `false` on failure
pdfioContentPathLineTo(
pdfio_stream_t *st, // I - Stream
double x, // I - X position
double y) // I - Y position
{
return (pdfioStreamPrintf(st, "%g %g l\n", x, y));
}
//
// 'pdfioContentPathMoveTo()' - Start a new subpath.
//
bool // O - `true` on success, `false` on failure
pdfioContentPathMoveTo(
pdfio_stream_t *st, // I - Stream
double x, // I - X position
double y) // I - Y position
{
return (pdfioStreamPrintf(st, "%g %g m\n", x, y));
}
//
// 'pdfioContentPathRect()' - Add a rectangle to the current path.
//
bool // O - `true` on success, `false` on failure
pdfioContentPathRect(
pdfio_stream_t *st, // I - Stream
double x, // I - X offset
double y, // I - Y offset
double width, // I - Width
double height) // I - Height
{
return (pdfioStreamPrintf(st, "%g %g %g %g re\n", x, y, width, height));
}
//
// 'pdfioContentRestore()' - Restore a previous graphics state.
//
bool // O - `true` on success, `false` on failure
pdfioContentRestore(
pdfio_stream_t *st) // I - Stream
{
return (pdfioStreamPuts(st, "Q\n"));
}
//
// 'pdfioContentSave()' - Save the current graphics state.
//
bool // O - `true` on success, `false` on failure
pdfioContentSave(pdfio_stream_t *st) // I - Stream
{
return (pdfioStreamPuts(st, "q\n"));
}
//
// 'pdfioContentSetDashPattern()' - Set the stroke pattern.
//
// This function sets the stroke pattern when drawing lines. If "on" and "off"
// are 0, a solid line is drawn.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetDashPattern(
pdfio_stream_t *st, // I - Stream
double phase, // I - Phase (offset within pattern)
double on, // I - On length
double off) // I - Off length
{
if (on <= 0.0 && off <= 0.0)
return (pdfioStreamPrintf(st, "[] %g d\n", phase));
else if (fabs(on - off) < 0.001)
return (pdfioStreamPrintf(st, "[%g] %g d\n", on, phase));
else
return (pdfioStreamPrintf(st, "[%g %g] %g d\n", on, off, phase));
}
//
// 'pdfioContentSetFillColorDeviceCMYK()' - Set device CMYK fill color.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetFillColorDeviceCMYK(
pdfio_stream_t *st, // I - Stream
double c, // I - Cyan value (0.0 to 1.0)
double m, // I - Magenta value (0.0 to 1.0)
double y, // I - Yellow value (0.0 to 1.0)
double k) // I - Black value (0.0 to 1.0)
{
return (pdfioStreamPrintf(st, "%g %g %g %g k\n", c, m, y, k));
}
//
// 'pdfioContentSetFillColorDeviceGray()' - Set the device gray fill color.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetFillColorDeviceGray(
pdfio_stream_t *st, // I - Stream
double g) // I - Gray value (0.0 to 1.0)
{
return (pdfioStreamPrintf(st, "%g g\n", g));
}
//
// 'pdfioContentSetFillColorDeviceRGB()' - Set the device RGB fill color.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetFillColorDeviceRGB(
pdfio_stream_t *st, // I - Stream
double r, // I - Red value (0.0 to 1.0)
double g, // I - Green value (0.0 to 1.0)
double b) // I - Blue value (0.0 to 1.0)
{
return (pdfioStreamPrintf(st, "%g %g %g rg\n", r, g, b));
}
//
// 'pdfioContentSetFillColorGray()' - Set the calibrated gray fill color.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetFillColorGray(
pdfio_stream_t *st, // I - Stream
double g) // I - Gray value (0.0 to 1.0)
{
return (pdfioStreamPrintf(st, "%g sc\n", g));
}
//
// 'pdfioContentSetFillColorRGB()' - Set the calibrated RGB fill color.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetFillColorRGB(
pdfio_stream_t *st, // I - Stream
double r, // I - Red value (0.0 to 1.0)
double g, // I - Green value (0.0 to 1.0)
double b) // I - Blue value (0.0 to 1.0)
{
return (pdfioStreamPrintf(st, "%g %g %g sc\n", r, g, b));
}
//
// 'pdfioContentSetFillColorSpace()' - Set the fill colorspace.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetFillColorSpace(
pdfio_stream_t *st, // I - Stream
const char *name) // I - Color space name
{
return (pdfioStreamPrintf(st, "/%s cs\n", name));
}
//
// 'pdfioContentSetFlatness()' - Set the flatness tolerance.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetFlatness(
pdfio_stream_t *st, // I - Stream
double flatness) // I - Flatness value (0.0 to 100.0)
{
return (pdfioStreamPrintf(st, "%g i\n", flatness));
}
//
// 'pdfioContentSetLineCap()' - Set the line ends style.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetLineCap(
pdfio_stream_t *st, // I - Stream
pdfio_linecap_t lc) // I - Line cap value
{
return (pdfioStreamPrintf(st, "%d J\n", lc));
}
//
// 'pdfioContentSetLineJoin()' - Set the line joining style.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetLineJoin(
pdfio_stream_t *st, // I - Stream
pdfio_linejoin_t lj) // I - Line join value
{
return (pdfioStreamPrintf(st, "%d j\n", lj));
}
//
// 'pdfioContentSetLineWidth()' - Set the line width.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetLineWidth(
pdfio_stream_t *st, // I - Stream
double width) // I - Line width value
{
return (pdfioStreamPrintf(st, "%g w\n", width));
}
//
// 'pdfioContentSetMiterLimit()' - Set the miter limit.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetMiterLimit(
pdfio_stream_t *st, // I - Stream
double limit) // I - Miter limit value
{
return (pdfioStreamPrintf(st, "%g M\n", limit));
}
//
// 'pdfioContentSetStrokeColorDeviceCMYK()' - Set the device CMYK stroke color.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetStrokeColorDeviceCMYK(
pdfio_stream_t *st, // I - Stream
double c, // I - Cyan value (0.0 to 1.0)
double m, // I - Magenta value (0.0 to 1.0)
double y, // I - Yellow value (0.0 to 1.0)
double k) // I - Black value (0.0 to 1.0)
{
return (pdfioStreamPrintf(st, "%g %g %g %g K\n", c, m, y, k));
}
//
// 'pdfioContentSetStrokeColorDeviceGray()' - Set the device gray stroke color.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetStrokeColorDeviceGray(
pdfio_stream_t *st, // I - Stream
double g) // I - Gray value (0.0 to 1.0)
{
return (pdfioStreamPrintf(st, "%g G\n", g));
}
//
// 'pdfioContentSetStrokeColorDeviceRGB()' - Set the device RGB stroke color.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetStrokeColorDeviceRGB(
pdfio_stream_t *st, // I - Stream
double r, // I - Red value (0.0 to 1.0)
double g, // I - Green value (0.0 to 1.0)
double b) // I - Blue value (0.0 to 1.0)
{
return (pdfioStreamPrintf(st, "%g %g %g RG\n", r, g, b));
}
//
// 'pdfioContentSetStrokeColorGray()' - Set the calibrated gray stroke color.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetStrokeColorGray(
pdfio_stream_t *st, // I - Stream
double g) // I - Gray value (0.0 to 1.0)
{
return (pdfioStreamPrintf(st, "%g SC\n", g));
}
//
// 'pdfioContentSetStrokeColorRGB()' - Set the calibrated RGB stroke color.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetStrokeColorRGB(
pdfio_stream_t *st, // I - Stream
double r, // I - Red value (0.0 to 1.0)
double g, // I - Green value (0.0 to 1.0)
double b) // I - Blue value (0.0 to 1.0)
{
return (pdfioStreamPrintf(st, "%g %g %g SC\n", r, g, b));
}
//
// 'pdfioContentSetStrokeColorSpace()' - Set the stroke color space.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetStrokeColorSpace(
pdfio_stream_t *st, // I - Stream
const char *name) // I - Color space name
{
return (pdfioStreamPrintf(st, "/%s CS\n", name));
}
//
// 'pdfioContentSetTextCharacterSpacing()' - Set the spacing between characters.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetTextCharacterSpacing(
pdfio_stream_t *st, // I - Stream
double spacing) // I - Character spacing
{
return (pdfioStreamPrintf(st, "%g Tc\n", spacing));
}
//
// 'pdfioContentSetTextFont()' - Set the text font and size.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetTextFont(
pdfio_stream_t *st, // I - Stream
const char *name, // I - Font name
double size) // I - Font size
{
return (pdfioStreamPrintf(st, "/%s %g Tf\n", name, size));
}
//
// 'pdfioContentSetTextLeading()' - Set text leading (line height) value.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetTextLeading(
pdfio_stream_t *st, // I - Stream
double leading) // I - Leading (line height) value
{
return (pdfioStreamPrintf(st, "%g TL\n", leading));
}
//
// 'pdfioContentSetTextMatrix()' - Set the text transform matrix.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetTextMatrix(
pdfio_stream_t *st, // I - Stream
pdfio_matrix_t m) // I - Transform matrix
{
return (pdfioStreamPrintf(st, "%g %g %g %g %g %g Tm\n", m[0][0], m[0][1], m[1][0], m[1][1], m[2][0], m[2][1]));
}
//
// 'pdfioContentSetTextRenderingMode()' - Set the text rendering mode.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetTextRenderingMode(
pdfio_stream_t *st, // I - Stream
pdfio_textrendering_t mode) // I - Text rendering mode
{
return (pdfioStreamPrintf(st, "%d Tr\n", mode));
}
//
// 'pdfioContentSetTextRise()' - Set the text baseline offset.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetTextRise(
pdfio_stream_t *st, // I - Stream
double rise) // I - Y offset
{
return (pdfioStreamPrintf(st, "%g Ts\n", rise));
}