// // 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 necessary headers... // #include "pdfio-private.h" #include "pdfio-content.h" #include "ttf.h" #include #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)); } // // 'pdfioContentSetTextWordSpacing()' - Set the inter-word spacing. // bool // O - `true` on success, `false` on failure pdfioContentSetTextWordSpacing( pdfio_stream_t *st, // I - Stream double spacing) // I - Spacing between words { return (pdfioStreamPrintf(st, "%g Tw\n", spacing)); } // // 'pdfioContentSetTextXScaling()' - Set the horizontal scaling value. // bool // O - `true` on success, `false` on failure pdfioContentSetTextXScaling( pdfio_stream_t *st, // I - Stream double percent) // I - Horizontal scaling in percent { return (pdfioStreamPrintf(st, "%g Tz\n", percent)); } // // 'pdfioContentStroke()' - Stroke the current path. // bool // O - `true` on success, `false` on failure pdfioContentStroke(pdfio_stream_t *st) // I - Stream { return (pdfioStreamPuts(st, "S\n")); } // // 'pdfioContentTextBegin()' - Begin a text block. // bool // O - `true` on success, `false` on failure pdfioContentTextBegin( pdfio_stream_t *st) // I - Stream { return (pdfioStreamPuts(st, "BT\n")); } // // 'pdfioContentTextEnd()' - End a text block. // bool // O - `true` on success, `false` on failure pdfioContentTextEnd(pdfio_stream_t *st) // I - Stream { return (pdfioStreamPuts(st, "ET\n")); } // // 'pdfioContentTextMoveLine()' - Move to the next line and offset. // bool // O - `true` on success, `false` on failure pdfioContentTextMoveLine( pdfio_stream_t *st, // I - Stream double tx, // I - X offset double ty) // I - Y offset { return (pdfioStreamPrintf(st, "%g %g TD\n", tx, ty)); } // // 'pdfioContentTextMoveTo()' - Offset within the current line. // bool // O - `true` on success, `false` on failure pdfioContentTextMoveTo( pdfio_stream_t *st, // I - Stream double tx, // I - X offset double ty) // I - Y offset { return (pdfioStreamPrintf(st, "%g %g Td\n", tx, ty)); } // // 'pdfioContentTextNextLine()' - Move to the next line. // bool // O - `true` on success, `false` on failure pdfioContentTextNextLine( pdfio_stream_t *st) // I - Stream { return (pdfioStreamPuts(st, "T*\n")); } // // 'pdfioContentTextShow()' - Show text. // // This function shows some text in a PDF content stream. The "unicode" argument // specifies that the current font maps to full Unicode. The "s" argument // specifies a UTF-8 encoded string. // bool // O - `true` on success, `false` on failure pdfioContentTextShow( pdfio_stream_t *st, // I - Stream bool unicode, // I - Unicode text? const char *s) // I - String to show { bool newline = false; // New line? // Write the string... if (!write_string(st, unicode, s, &newline)) return (false); // Draw it... if (newline) return (pdfioStreamPuts(st, "Tj T*\n")); else return (pdfioStreamPuts(st, "Tj\n")); } // // 'pdfioContentTextShowf()' - Show formatted text. // // This function shows some text in a PDF content stream. The "unicode" argument // specifies that the current font maps to full Unicode. The "format" argument // specifies a UTF-8 encoded `printf`-style format string. // bool pdfioContentTextShowf( pdfio_stream_t *st, // I - Stream bool unicode, // I - Unicode text? const char *format, // I - `printf`-style format string ...) // I - Additional arguments as needed { bool newline = false; // New line? char buffer[8192]; // Text buffer va_list ap; // Argument pointer // Format the string... va_start(ap, format); vsnprintf(buffer, sizeof(buffer), format, ap); va_end(ap); // Write the string... if (!write_string(st, unicode, buffer, &newline)) return (false); // Draw it... if (newline) return (pdfioStreamPuts(st, "Tj T*\n")); else return (pdfioStreamPuts(st, "Tj\n")); } // // 'pdfioContentTextShowJustified()' - Show justified text. // // This function shows some text in a PDF content stream. The "unicode" argument // specifies that the current font maps to full Unicode. The "fragments" // argument specifies an array of UTF-8 encoded strings. // bool // O - `true` on success, `false` on failure pdfioContentTextShowJustified( pdfio_stream_t *st, // I - Stream bool unicode, // I - Unicode text? size_t num_fragments, // I - Number of text fragments const double *offsets, // I - Text offsets before fragments const char * const *fragments) // I - Text fragments { size_t i; // Looping var // Write an array of offsets and string fragments... if (!pdfioStreamPuts(st, "[")) return (false); for (i = 0; i < num_fragments; i ++) { if (offsets[i] != 0.0f) { if (!pdfioStreamPrintf(st, "%g", offsets[i])) return (false); } if (fragments[i]) { if (!write_string(st, unicode, fragments[i], NULL)) return (false); } } return (pdfioStreamPuts(st, "]TJ\n")); } // // 'pdfioFileCreateBaseFontObj()' - Create one of the base 14 PDF fonts. // // This function creates one of the base 14 PDF fonts. The "name" parameter // specifies the font nane: // // - "Courier" // - "Courier-Bold" // - "Courier-BoldItalic" // - "Courier-Italic" // - "Helvetica" // - "Helvetica-Bold" // - "Helvetica-BoldOblique" // - "Helvetica-Oblique" // - "Symbol" // - "Times-Bold" // - "Times-BoldItalic" // - "Times-Italic" // - "Times-Roman" // - "ZapfDingbats" // // Base fonts always use the Windows CP1252 (ISO-8859-1 with additional // characters such as the Euro symbol) subset of Unicode. // pdfio_obj_t * // O - Font object pdfioFileCreateFontObjFromBase( pdfio_file_t *pdf, // I - PDF file const char *name) // I - Font name { pdfio_dict_t *dict; // Font dictionary pdfio_obj_t *obj; // Font object if ((dict = pdfioDictCreate(pdf)) == NULL) return (NULL); pdfioDictSetName(dict, "Type", "Font"); pdfioDictSetName(dict, "Subtype", "Type1"); pdfioDictSetName(dict, "BaseFont", pdfioStringCreate(pdf, name)); if (strcmp(name, "Symbol") && strcmp(name, "ZapfDingbats")) { if (!pdf->cp1252_obj && !create_cp1252(pdf)) return (NULL); pdfioDictSetObj(dict, "Encoding", pdf->cp1252_obj); } if ((obj = pdfioFileCreateObj(dict->pdf, dict)) != NULL) pdfioObjClose(obj); return (obj); } // // 'pdfioFileCreateFontObjFromFile()' - Add a font object to a PDF file. // // This function embeds a TrueType/OpenType font into a PDF file. The // "unicode" parameter controls whether the font is encoded for two-byte // characters (potentially full Unicode, but more typically a subset) // or to only support the Windows CP1252 (ISO-8859-1 with additional // characters such as the Euro symbol) subset of Unicode. // pdfio_obj_t * // O - Font object pdfioFileCreateFontObjFromFile( pdfio_file_t *pdf, // I - PDF file const char *filename, // I - Filename bool unicode) // I - Force Unicode { ttf_t *font; // TrueType font ttf_rect_t bounds; // Font bounds pdfio_dict_t *dict, // Font dictionary *desc, // Font descriptor *file; // Font file dictionary pdfio_obj_t *obj, // Font object *desc_obj, // Font descriptor object *file_obj; // Font file object const char *basefont; // Base font name pdfio_array_t *bbox; // Font bounding box array pdfio_stream_t *st; // Font stream int fd; // File unsigned char buffer[16384]; // Read buffer ssize_t bytes; // Bytes read // Range check input... if (!pdf) return (NULL); if (!filename) { _pdfioFileError(pdf, "No TrueType/OpenType filename specified."); return (NULL); } if ((fd = open(filename, O_RDONLY | O_BINARY)) < 0) { _pdfioFileError(pdf, "Unable to open font file '%s': %s", filename, strerror(errno)); return (NULL); } if ((font = ttfCreate(filename, 0, (ttf_err_cb_t)ttf_error_cb, pdf)) == NULL) { close(fd); return (NULL); } // Create the font file dictionary and object... if ((file = pdfioDictCreate(pdf)) == NULL) { ttfDelete(font); close(fd); return (NULL); } pdfioDictSetName(file, "Filter", "FlateDecode"); if ((file_obj = pdfioFileCreateObj(pdf, file)) == NULL) { ttfDelete(font); close(fd); return (NULL); } if ((st = pdfioObjCreateStream(file_obj, PDFIO_FILTER_FLATE)) == NULL) { ttfDelete(font); close(fd); return (NULL); } while ((bytes = read(fd, buffer, sizeof(buffer))) > 0) { if (!pdfioStreamWrite(st, buffer, (size_t)bytes)) { ttfDelete(font); close(fd); pdfioStreamClose(st); return (NULL); } } close(fd); pdfioStreamClose(st); // Create the font descriptor dictionary and object... if ((bbox = pdfioArrayCreate(pdf)) == NULL) { ttfDelete(font); return (NULL); } ttfGetBounds(font, &bounds); pdfioArrayAppendNumber(bbox, bounds.left); pdfioArrayAppendNumber(bbox, bounds.bottom); pdfioArrayAppendNumber(bbox, bounds.right); pdfioArrayAppendNumber(bbox, bounds.top); if ((desc = pdfioDictCreate(pdf)) == NULL) { ttfDelete(font); return (NULL); } basefont = pdfioStringCreate(pdf, ttfGetPostScriptName(font)); pdfioDictSetName(desc, "Type", "FontDescriptor"); pdfioDictSetName(desc, "FontName", basefont); pdfioDictSetObj(desc, "FontFile2", file_obj); pdfioDictSetNumber(desc, "Flags", ttfIsFixedPitch(font) ? 0x21 : 0x20); pdfioDictSetArray(desc, "FontBBox", bbox); pdfioDictSetNumber(desc, "ItalicAngle", ttfGetItalicAngle(font)); pdfioDictSetNumber(desc, "Ascent", ttfGetAscent(font)); pdfioDictSetNumber(desc, "Descent", ttfGetDescent(font)); pdfioDictSetNumber(desc, "CapHeight", ttfGetCapHeight(font)); pdfioDictSetNumber(desc, "XHeight", ttfGetXHeight(font)); // Note: No TrueType value exists for this but PDF requires it, so we // calculate a generic value from 50 to 250 based on the weight... pdfioDictSetNumber(desc, "StemV", ttfGetWeight(font) / 4 + 25); if ((desc_obj = pdfioFileCreateObj(pdf, desc)) == NULL) { ttfDelete(font); return (NULL); } pdfioObjClose(desc_obj); if (unicode) { // Unicode (CID) font... pdfio_dict_t *cid2gid; // CIDToGIDMap dictionary pdfio_obj_t *cid2gid_obj; // CIDToGIDMap object size_t i, // Looping var start, // Start character num_cmap; // Number of CMap entries const int *cmap; // CMap entries unsigned char *bufptr, // Pointer into buffer *bufend; // End of buffer pdfio_dict_t *type2; // CIDFontType2 font dictionary pdfio_obj_t *type2_obj; // CIDFontType2 font object pdfio_array_t *descendants; // Decendant font list pdfio_dict_t *sidict; // CIDSystemInfo dictionary pdfio_array_t *w_array, // Width array *temp_array; // Temporary width sub-array int w0, w1; // Widths // Create a CIDToGIDMap object for the Unicode font... if ((cid2gid = pdfioDictCreate(pdf)) == NULL) { ttfDelete(font); return (NULL); } #ifndef DEBUG pdfioDictSetName(cid2gid, "Filter", "FlateDecode"); #endif // !DEBUG if ((cid2gid_obj = pdfioFileCreateObj(pdf, cid2gid)) == NULL) { ttfDelete(font); return (NULL); } #ifdef DEBUG if ((st = pdfioObjCreateStream(cid2gid_obj, PDFIO_FILTER_NONE)) == NULL) #else if ((st = pdfioObjCreateStream(cid2gid_obj, PDFIO_FILTER_FLATE)) == NULL) #endif // DEBUG { ttfDelete(font); return (NULL); } cmap = ttfGetCMap(font, &num_cmap); PDFIO_DEBUG("pdfioFileCreateFontObjFromFile: num_cmap=%u\n", (unsigned)num_cmap); for (i = 0, bufptr = buffer, bufend = buffer + sizeof(buffer); i < num_cmap; i ++) { PDFIO_DEBUG("pdfioFileCreateFontObjFromFile: cmap[%u]=%d\n", (unsigned)i, cmap[i]); if (cmap[i] < 0) { // Map undefined glyph to .notdef... *bufptr++ = 0; *bufptr++ = 0; } else { // Map to specified glyph... *bufptr++ = (unsigned char)((cmap[i] + 1) >> 8); *bufptr++ = (unsigned char)((cmap[i] + 1) & 255); } if (bufptr >= bufend) { // Flush buffer... if (!pdfioStreamWrite(st, buffer, (size_t)(bufptr - buffer))) { pdfioStreamClose(st); ttfDelete(font); return (NULL); } bufptr = buffer; } } if (bufptr > buffer) { // Flush buffer... if (!pdfioStreamWrite(st, buffer, (size_t)(bufptr - buffer))) { pdfioStreamClose(st); ttfDelete(font); return (NULL); } } pdfioStreamClose(st); // Create a CIDFontType2 dictionary for the Unicode font... if ((type2 = pdfioDictCreate(pdf)) == NULL) { ttfDelete(font); return (NULL); } if ((sidict = pdfioDictCreate(pdf)) == NULL) { ttfDelete(font); return (NULL); } // Width array if ((w_array = pdfioArrayCreate(pdf)) == NULL) { ttfDelete(font); return (NULL); } for (start = 0, w0 = ttfGetWidth(font, 0), i = 1; i < 65536; start = i, w0 = w1, i ++) { while (i < 65536 && (w1 = ttfGetWidth(font, i)) == w0) i ++; if ((i - start) > 1) { // Encode a repeating sequence... pdfioArrayAppendNumber(w_array, start); pdfioArrayAppendNumber(w_array, i); pdfioArrayAppendNumber(w_array, w0); } else { // Encode a non-repeating sequence... pdfioArrayAppendNumber(w_array, start); if ((temp_array = pdfioArrayCreate(pdf)) == NULL) { ttfDelete(font); return (NULL); } pdfioArrayAppendNumber(temp_array, w0); for (w0 = w1, i ++; i < 65536; w0 = w1, i ++) { if ((w1 = ttfGetWidth(font, i)) == w0 && i < 65535) break; pdfioArrayAppendNumber(temp_array, w0); } if (i == 65536) pdfioArrayAppendNumber(temp_array, w0); pdfioArrayAppendArray(w_array, temp_array); } } // CIDSystemInfo mapping to Adobe UCS2 v0 (Unicode) pdfioDictSetString(sidict, "Registry", "Adobe"); pdfioDictSetString(sidict, "Ordering", "Identity"); pdfioDictSetNumber(sidict, "Supplement", 0); // Then the dictionary for the CID base font... pdfioDictSetName(type2, "Type", "Font"); pdfioDictSetName(type2, "Subtype", "CIDFontType2"); pdfioDictSetName(type2, "BaseFont", basefont); pdfioDictSetDict(type2, "CIDSystemInfo", sidict); pdfioDictSetObj(type2, "CIDToGIDMap", cid2gid_obj); pdfioDictSetObj(type2, "FontDescriptor", desc_obj); pdfioDictSetArray(type2, "W", w_array); if ((type2_obj = pdfioFileCreateObj(pdf, type2)) == NULL) { ttfDelete(font); return (NULL); } pdfioObjClose(type2_obj); // Create a Type 0 font object... if ((descendants = pdfioArrayCreate(pdf)) == NULL) { ttfDelete(font); return (NULL); } pdfioArrayAppendObj(descendants, type2_obj); if ((dict = pdfioDictCreate(pdf)) == NULL) { ttfDelete(font); return (NULL); } pdfioDictSetName(dict, "Type", "Font"); pdfioDictSetName(dict, "Subtype", "Type0"); pdfioDictSetName(dict, "BaseFont", basefont); pdfioDictSetArray(dict, "DescendantFonts", descendants); pdfioDictSetName(dict, "Encoding", "Identity-H"); if ((obj = pdfioFileCreateObj(pdf, dict)) == NULL) return (NULL); pdfioObjClose(obj); } else { // Simple (CP1282 or custom encoding) 8-bit font... if (ttfGetMaxChar(font) >= 255 && !pdf->cp1252_obj && !create_cp1252(pdf)) { ttfDelete(font); return (NULL); } // Create a TrueType font object... if ((dict = pdfioDictCreate(pdf)) == NULL) { ttfDelete(font); return (NULL); } pdfioDictSetName(dict, "Type", "Font"); pdfioDictSetName(dict, "Subtype", "TrueType"); pdfioDictSetName(dict, "BaseFont", basefont); if (ttfGetMaxChar(font) >= 255) pdfioDictSetObj(dict, "Encoding", pdf->cp1252_obj); pdfioDictSetObj(dict, "FontDescriptor", desc_obj); if ((obj = pdfioFileCreateObj(pdf, dict)) == NULL) { ttfDelete(font); return (NULL); } pdfioObjClose(obj); } ttfDelete(font); return (obj); } // // 'pdfioFileCreateICCObjFromFile()' - Add an ICC profile object to a PDF file. // pdfio_obj_t * // O - Object pdfioFileCreateICCObjFromFile( pdfio_file_t *pdf, // I - PDF file const char *filename, // I - Filename size_t num_colors) // I - Number of color components (1, 3, or 4) { pdfio_dict_t *dict; // ICC profile dictionary pdfio_obj_t *obj; // ICC profile object pdfio_stream_t *st; // ICC profile stream int fd; // File unsigned char buffer[16384]; // Read buffer ssize_t bytes; // Bytes read // Range check input... if (!pdf) return (NULL); if (!filename) { _pdfioFileError(pdf, "No ICC profile filename specified."); return (NULL); } if ((fd = open(filename, O_RDONLY | O_BINARY)) < 0) { _pdfioFileError(pdf, "Unable to open ICC profile '%s': %s", filename, strerror(errno)); return (NULL); } if (num_colors != 1 && num_colors != 3 && num_colors != 4) { _pdfioFileError(pdf, "Unsupported number of colors (%lu) for ICC profile.", (unsigned long)num_colors); close(fd); return (NULL); } // Create the ICC profile object... if ((dict = pdfioDictCreate(pdf)) == NULL) { close(fd); return (NULL); } pdfioDictSetNumber(dict, "N", num_colors); pdfioDictSetName(dict, "Filter", "FlateDecode"); if ((obj = pdfioFileCreateObj(pdf, dict)) == NULL) { close(fd); return (NULL); } if ((st = pdfioObjCreateStream(obj, PDFIO_FILTER_FLATE)) == NULL) { close(fd); return (NULL); } while ((bytes = read(fd, buffer, sizeof(buffer))) > 0) { if (!pdfioStreamWrite(st, buffer, (size_t)bytes)) { close(fd); pdfioStreamClose(st); return (NULL); } } close(fd); pdfioStreamClose(st); return (obj); } // // 'pdfioFileCreateImageObjFromData()' - Add image object(s) to a PDF file from memory. // // This function creates image object(s) in a PDF file from a data buffer in // memory. The "data" parameter points to the image data as 8-bit color values. // The "width" and "height" parameters specify the image dimensions. The // "num_colors" parameter specifies the number of color components (`1` for // grayscale, `3` for RGB, and `4` for CMYK) and the "alpha" parameter specifies // whether each color tuple is followed by an alpha value. The "color_data" // parameter specifies an optional color space array for the image - if `NULL`, // the image is encoded in the corresponding device color space. The // "interpolate" parameter specifies whether to interpolate when scaling the // image on the page. // // Note: When creating an image object with alpha, a second image object is // created to hold the "soft mask" data for the primary image. // pdfio_obj_t * // O - Object pdfioFileCreateImageObjFromData( pdfio_file_t *pdf, // I - PDF file const unsigned char *data, // I - Pointer to image data size_t width, // I - Width of image size_t height, // I - Height of image size_t num_colors, // I - Number of colors pdfio_array_t *color_data, // I - Colorspace data or `NULL` for default bool alpha, // I - `true` if data contains an alpha channel bool interpolate) // I - Interpolate image data? { pdfio_dict_t *dict, // Image dictionary *decode; // DecodeParms dictionary pdfio_obj_t *obj, // Image object *mask_obj = NULL; // Mask image object, if any pdfio_stream_t *st; // Image stream size_t x, y, // X and Y position in image bpp, // Bytes per pixel linelen; // Line length const unsigned char *dataptr; // Pointer into image data unsigned char *line = NULL, // Current line *lineptr; // Pointer into line static const char *defcolors[] = // Default ColorSpace values { NULL, "DeviceGray", NULL, "DeviceRGB", "DeviceCMYK" }; // Range check input... if (!pdf || !data || !width || !height || num_colors < 1 || num_colors == 2 || num_colors > 4) return (NULL); // Allocate memory for one line of data... bpp = alpha ? num_colors + 1 : num_colors; linelen = num_colors * width; if ((line = malloc(linelen)) == NULL) return (NULL); // Generate a mask image, as needed... if (alpha) { // Create the image mask dictionary... if ((dict = pdfioDictCreate(pdf)) == NULL) { free(line); return (NULL); } pdfioDictSetName(dict, "Type", "XObject"); pdfioDictSetName(dict, "Subtype", "Image"); pdfioDictSetNumber(dict, "Width", width); pdfioDictSetNumber(dict, "Height", height); pdfioDictSetNumber(dict, "BitsPerComponent", 8); pdfioDictSetName(dict, "ColorSpace", "DeviceGray"); pdfioDictSetName(dict, "Filter", "FlateDecode"); if ((decode = pdfioDictCreate(pdf)) == NULL) { free(line); return (NULL); } pdfioDictSetNumber(decode, "BitsPerComponent", 8); pdfioDictSetNumber(decode, "Colors", 1); pdfioDictSetNumber(decode, "Columns", width); pdfioDictSetNumber(decode, "Predictor", _PDFIO_PREDICTOR_PNG_AUTO); pdfioDictSetDict(dict, "DecodeParms", decode); // Create the mask object and write the mask image... if ((mask_obj = pdfioFileCreateObj(pdf, dict)) == NULL) { free(line); return (NULL); } if ((st = pdfioObjCreateStream(mask_obj, PDFIO_FILTER_FLATE)) == NULL) { free(line); pdfioObjClose(mask_obj); return (NULL); } for (y = height, dataptr = data + num_colors; y > 0; y --) { for (x = width, lineptr = line; x > 0; x --, dataptr += bpp) *lineptr++ = *dataptr; pdfioStreamWrite(st, line, width); } pdfioStreamClose(st); } // Now create the image... if ((dict = pdfioDictCreate(pdf)) == NULL) { free(line); return (NULL); } pdfioDictSetName(dict, "Type", "XObject"); pdfioDictSetName(dict, "Subtype", "Image"); pdfioDictSetBoolean(dict, "Interpolate", interpolate); pdfioDictSetNumber(dict, "Width", width); pdfioDictSetNumber(dict, "Height", height); pdfioDictSetNumber(dict, "BitsPerComponent", 8); pdfioDictSetName(dict, "Filter", "FlateDecode"); if (color_data) pdfioDictSetArray(dict, "ColorSpace", color_data); else pdfioDictSetName(dict, "ColorSpace", defcolors[num_colors]); if (mask_obj) pdfioDictSetObj(dict, "SMask", mask_obj); if ((decode = pdfioDictCreate(pdf)) == NULL) { free(line); return (NULL); } pdfioDictSetNumber(decode, "BitsPerComponent", 8); pdfioDictSetNumber(decode, "Colors", num_colors); pdfioDictSetNumber(decode, "Columns", width); pdfioDictSetNumber(decode, "Predictor", _PDFIO_PREDICTOR_PNG_AUTO); pdfioDictSetDict(dict, "DecodeParms", decode); if ((obj = pdfioFileCreateObj(pdf, dict)) == NULL) { free(line); return (NULL); } if ((st = pdfioObjCreateStream(obj, PDFIO_FILTER_FLATE)) == NULL) { free(line); pdfioObjClose(obj); return (NULL); } for (y = height, dataptr = data; y > 0; y --) { if (alpha) { switch (num_colors) { case 1 : for (x = width, lineptr = line; x > 0; x --, dataptr += bpp) *lineptr++ = *dataptr; break; case 3 : for (x = width, lineptr = line; x > 0; x --, dataptr += bpp) { *lineptr++ = dataptr[0]; *lineptr++ = dataptr[1]; *lineptr++ = dataptr[2]; } break; case 4 : for (x = width, lineptr = line; x > 0; x --, dataptr += bpp) { *lineptr++ = dataptr[0]; *lineptr++ = dataptr[1]; *lineptr++ = dataptr[2]; *lineptr++ = dataptr[3]; } break; } pdfioStreamWrite(st, line, linelen); } else { pdfioStreamWrite(st, dataptr, linelen); dataptr += linelen; } } free(line); pdfioStreamClose(st); return (obj); } // // 'pdfioFileCreateImageObjFromFile()' - Add an image object to a PDF file from a file. // // This function creates an image object in a PDF file from a JPEG or PNG file. // The "filename" parameter specifies the name of the JPEG or PNG file, while // the "interpolate" parameter specifies whether to interpolate when scaling the // image on the page. // // > Note: Currently PNG support is limited to grayscale, RGB, or indexed files // > without interlacing or alpha. Transparency (masking) based on color/index // > is supported. // pdfio_obj_t * // O - Object pdfioFileCreateImageObjFromFile( pdfio_file_t *pdf, // I - PDF file const char *filename, // I - Filename bool interpolate) // I - Interpolate image data? { pdfio_dict_t *dict; // Image dictionary pdfio_obj_t *obj; // Image object int fd; // File unsigned char buffer[32]; // Read buffer _pdfio_image_func_t copy_func = NULL; // Image copy function // Range check input... if (!pdf || !filename) return (NULL); // Try opening the file... if ((fd = open(filename, O_RDONLY | O_BINARY)) < 0) { _pdfioFileError(pdf, "Unable to open image file '%s': %s", filename, strerror(errno)); return (NULL); } // Read the file header to determine the file format... if (read(fd, buffer, sizeof(buffer)) < (ssize_t)sizeof(buffer)) { _pdfioFileError(pdf, "Unable to read header from image file '%s'.", filename); close(fd); return (NULL); } lseek(fd, 0, SEEK_SET); if (!memcmp(buffer, "\211PNG\015\012\032\012\000\000\000\015IHDR", 16)) { // PNG image... copy_func = copy_png; } else if (!memcmp(buffer, "\377\330\377", 3)) { // JPEG image... copy_func = copy_jpeg; } else { // Something else that isn't supported... _pdfioFileError(pdf, "Unsupported image file '%s'.", filename); close(fd); return (NULL); } // Create the base image dictionary the copy the file into an object... if ((dict = pdfioDictCreate(pdf)) == NULL) { close(fd); return (NULL); } pdfioDictSetName(dict, "Type", "XObject"); pdfioDictSetName(dict, "Subtype", "Image"); pdfioDictSetBoolean(dict, "Interpolate", interpolate); obj = (copy_func)(dict, fd); // Close the file and return the object... close(fd); return (obj); } // // 'pdfioImageGetBytesPerLine()' - Get the number of bytes to read for each line. // size_t // O - Number of bytes per line pdfioImageGetBytesPerLine( pdfio_obj_t *obj) // I - Image object { pdfio_dict_t *params; // DecodeParms value int width, // Width of image bpc, // BitsPerComponent of image colors; // Number of colors in image if (!obj || obj->value.type != PDFIO_VALTYPE_DICT) return (0); params = pdfioDictGetDict(obj->value.value.dict, "DecodeParms"); bpc = (int)pdfioDictGetNumber(params, "BitsPerComponent"); colors = (int)pdfioDictGetNumber(params, "Colors"); width = (int)pdfioDictGetNumber(params, "Columns"); if (width == 0) width = (int)pdfioDictGetNumber(obj->value.value.dict, "Width"); if (bpc == 0) { if ((bpc = (int)pdfioDictGetNumber(obj->value.value.dict, "BitsPerComponent")) == 0) bpc = 8; } if (colors == 0) { const char *cs_name; // ColorSpace name pdfio_array_t *cs_array; // ColorSpace array if ((cs_name = pdfioDictGetName(obj->value.value.dict, "ColorSpace")) == NULL) { if ((cs_array = pdfioDictGetArray(obj->value.value.dict, "ColorSpace")) != NULL) cs_name = pdfioArrayGetName(cs_array, 0); } if (!cs_name || strstr(cs_name, "RGB")) colors = 3; else if (strstr(cs_name, "CMYK")) colors = 4; else colors = 1; } return ((size_t)((width * colors * bpc + 7) / 8)); } // // 'pdfioImageGetHeight()' - Get the height of an image object. // double // O - Height in lines pdfioImageGetHeight(pdfio_obj_t *obj) // I - Image object { if (obj) return (pdfioDictGetNumber(obj->value.value.dict, "Height")); else return (0.0); } // // 'pdfioImageGetWidth()' - Get the width of an image object. // double // O - Width in columns pdfioImageGetWidth(pdfio_obj_t *obj) // I - Image object { if (obj) return (pdfioDictGetNumber(obj->value.value.dict, "Width")); else return (0.0); } // // 'pdfioPageDictAddColorSpace()' - Add a color space to the page dictionary. // // This function adds a named color space to the page dictionary. // // The names "DefaultCMYK", "DefaultGray", and "DefaultRGB" specify the default // device color space used for the page. // // The "data" array contains a calibrated, indexed, or ICC-based color space // array that was created using the // @link pdfioArrayCreateCalibratedColorFromMatrix@, // @link pdfioArrayCreateCalibratedColorFromPrimaries@, // @link pdfioArrayCreateICCBasedColor@, or // @link pdfioArrayCreateIndexedColor@ functions. // bool // O - `true` on success, `false` on failure pdfioPageDictAddColorSpace( pdfio_dict_t *dict, // I - Page dictionary const char *name, // I - Color space name pdfio_array_t *data) // I - Color space array { pdfio_dict_t *resources; // Resource dictionary pdfio_dict_t *colorspace; // ColorSpace dictionary // Range check input... if (!dict || !name || !data) return (false); // Get the ColorSpace dictionary... if ((resources = pdfioDictGetDict(dict, "Resources")) == NULL) { if ((resources = pdfioDictCreate(dict->pdf)) == NULL) return (false); if (!pdfioDictSetDict(dict, "Resources", resources)) return (false); } if ((colorspace = pdfioDictGetDict(resources, "ColorSpace")) == NULL) { if ((colorspace = pdfioDictCreate(dict->pdf)) == NULL) return (false); if (!pdfioDictSetDict(resources, "ColorSpace", colorspace)) return (false); } // Now set the color space reference and return... return (pdfioDictSetArray(colorspace, name, data)); } // // 'pdfioPageDictAddFont()' - Add a font object to the page dictionary. // bool // O - `true` on success, `false` on failure pdfioPageDictAddFont( pdfio_dict_t *dict, // I - Page dictionary const char *name, // I - Font name pdfio_obj_t *obj) // I - Font object { pdfio_dict_t *resources; // Resource dictionary pdfio_dict_t *font; // Font dictionary // Range check input... if (!dict || !name || !obj) return (false); // Get the Resources dictionary... if ((resources = pdfioDictGetDict(dict, "Resources")) == NULL) { if ((resources = pdfioDictCreate(dict->pdf)) == NULL) return (false); if (!pdfioDictSetDict(dict, "Resources", resources)) return (false); } // Get the Font dictionary... if ((font = pdfioDictGetDict(resources, "Font")) == NULL) { if ((font = pdfioDictCreate(dict->pdf)) == NULL) return (false); if (!pdfioDictSetDict(resources, "Font", font)) return (false); } // Now set the image reference in the Font resource dictionary and return... return (pdfioDictSetObj(font, name, obj)); } // // 'pdfioPageDictAddImage()' - Add an image object to the page dictionary. // bool // O - `true` on success, `false` on failure pdfioPageDictAddImage( pdfio_dict_t *dict, // I - Page dictionary const char *name, // I - Image name pdfio_obj_t *obj) // I - Image object { pdfio_dict_t *resources; // Resource dictionary pdfio_dict_t *xobject; // XObject dictionary // Range check input... if (!dict || !name || !obj) return (false); // Get the Resources dictionary... if ((resources = pdfioDictGetDict(dict, "Resources")) == NULL) { if ((resources = pdfioDictCreate(dict->pdf)) == NULL) return (false); if (!pdfioDictSetDict(dict, "Resources", resources)) return (false); } // Get the XObject dictionary... if ((xobject = pdfioDictGetDict(resources, "XObject")) == NULL) { if ((xobject = pdfioDictCreate(dict->pdf)) == NULL) return (false); if (!pdfioDictSetDict(resources, "XObject", xobject)) return (false); } // Now set the image reference in the XObject resource dictionary and return... return (pdfioDictSetObj(xobject, name, obj)); } // // 'copy_jpeg()' - Copy a JPEG image. // static pdfio_obj_t * // O - Object or `NULL` on error copy_jpeg(pdfio_dict_t *dict, // I - Dictionary int fd) // I - File descriptor { pdfio_obj_t *obj; // Object pdfio_stream_t *st; // Stream for JPEG data ssize_t bytes; // Bytes read unsigned char buffer[16384], // Read buffer *bufptr, // Pointer into buffer *bufend; // End of buffer size_t length; // Length of chunk unsigned width = 0, // Width in columns height = 0, // Height in lines num_colors = 0; // Number of colors // Scan the file for a SOFn marker, then we can get the dimensions... bytes = read(fd, buffer, sizeof(buffer)); for (bufptr = buffer + 2, bufend = buffer + bytes; bufptr < bufend;) { if (*bufptr == 0xff) { bufptr ++; if (bufptr >= bufend) { /* * If we are at the end of the current buffer, re-fill and continue... */ if ((bytes = read(fd, buffer, sizeof(buffer))) <= 0) break; bufptr = buffer; bufend = buffer + bytes; } if (*bufptr == 0xff) continue; if ((bufptr + 16) >= bufend) { /* * Read more of the marker... */ bytes = bufend - bufptr; memmove(buffer, bufptr, (size_t)bytes); bufptr = buffer; bufend = buffer + bytes; if ((bytes = read(fd, bufend, sizeof(buffer) - (size_t)bytes)) <= 0) break; bufend += bytes; } length = (size_t)((bufptr[1] << 8) | bufptr[2]); PDFIO_DEBUG("copy_jpeg: JPEG X'FF%02X' (length %u)\n", *bufptr, (unsigned)length); if ((*bufptr >= 0xc0 && *bufptr <= 0xc3) || (*bufptr >= 0xc5 && *bufptr <= 0xc7) || (*bufptr >= 0xc9 && *bufptr <= 0xcb) || (*bufptr >= 0xcd && *bufptr <= 0xcf)) { // SOFn marker, look for dimensions... if (bufptr[3] != 8) { _pdfioFileError(dict->pdf, "Unable to load %d-bit JPEG image.", bufptr[3]); return (NULL); } width = (unsigned)((bufptr[6] << 8) | bufptr[7]); height = (unsigned)((bufptr[4] << 8) | bufptr[5]); num_colors = bufptr[8]; break; } // Skip past this marker... bufptr ++; bytes = bufend - bufptr; while (length >= (size_t)bytes) { length -= (size_t)bytes; if ((bytes = read(fd, buffer, sizeof(buffer))) <= 0) break; bufptr = buffer; bufend = buffer + bytes; } if (length > (size_t)bytes) break; bufptr += length; } } if (width == 0 || height == 0 || (num_colors != 1 && num_colors != 3)) return (NULL); // Create the image object... pdfioDictSetNumber(dict, "Width", width); pdfioDictSetNumber(dict, "Height", height); pdfioDictSetNumber(dict, "BitsPerComponent", 8); pdfioDictSetArray(dict, "ColorSpace", pdfioArrayCreateColorFromStandard(dict->pdf, num_colors, PDFIO_CS_SRGB)); pdfioDictSetName(dict, "Filter", "DCTDecode"); obj = pdfioFileCreateObj(dict->pdf, dict); st = pdfioObjCreateStream(obj, PDFIO_FILTER_NONE); // Copy the file to a stream... lseek(fd, 0, SEEK_SET); while ((bytes = read(fd, buffer, sizeof(buffer))) > 0) { if (!pdfioStreamWrite(st, buffer, (size_t)bytes)) return (NULL); } if (!pdfioStreamClose(st)) return (NULL); return (obj); } // // 'copy_png()' - Copy a PNG image. // static pdfio_obj_t * // O - Object or `NULL` on error copy_png(pdfio_dict_t *dict, // I - Dictionary int fd) // I - File descriptor { pdfio_obj_t *obj = NULL; // Object pdfio_stream_t *st = NULL; // Stream for PNG data pdfio_dict_t *decode = NULL; // Parameters for PNG decode ssize_t bytes; // Bytes read unsigned char buffer[16384]; // Read buffer unsigned i, // Looping var length, // Length type, // Chunk code crc, // CRC-32 temp, // Temporary value width = 0, // Width height = 0; // Height unsigned char bit_depth = 0, // Bit depth color_type = 0; // Color type double gamma = 2.2, // Gamma value wx = 0.0, wy = 0.0, // White point chromacity rx = 0.0, ry = 0.0, // Red chromacity gx = 0.0, gy = 0.0, // Green chromacity bx = 0.0, by = 0.0; // Blue chromacity pdfio_array_t *mask = NULL; // Color masking array // Read the file header... if (read(fd, buffer, 8) != 8) return (NULL); // Then read chunks until we have the image data... while (read(fd, buffer, 8) == 8) { // Get the chunk length and type values... length = (unsigned)((buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3]); type = (unsigned)((buffer[4] << 24) | (buffer[5] << 16) | (buffer[6] << 8) | buffer[7]); crc = update_png_crc(0xffffffff, buffer + 4, 4); switch (type) { case _PDFIO_PNG_CHUNK_IDAT : // Image data if (!width || !height) { _pdfioFileError(dict->pdf, "Image data seen in PNG file before header."); return (NULL); } if (!st) { PDFIO_DEBUG("copy_png: wx=%g, wy=%g, rx=%g, ry=%g, gx=%g, gy=%g, bx=%g, by=%g\n", wx, wy, rx, ry, gx, gy, bx, by); PDFIO_DEBUG("copy_png: gamma=%g\n", gamma); if (!pdfioDictGetArray(dict, "ColorSpace")) { PDFIO_DEBUG("copy_png: Adding %s ColorSpace value.\n", color_type == _PDFIO_PNG_TYPE_GRAY ? "CalGray" : "CalRGB"); if (wx != 0.0) pdfioDictSetArray(dict, "ColorSpace", pdfioArrayCreateColorFromPrimaries(dict->pdf, color_type == _PDFIO_PNG_TYPE_GRAY ? 1 : 3, gamma, wx, wy, rx, ry, gx, gy, bx, by)); else pdfioDictSetArray(dict, "ColorSpace", pdfioArrayCreateColorFromStandard(dict->pdf, color_type == _PDFIO_PNG_TYPE_GRAY ? 1 : 3, PDFIO_CS_SRGB)); } obj = pdfioFileCreateObj(dict->pdf, dict); if ((st = pdfioObjCreateStream(obj, PDFIO_FILTER_NONE)) == NULL) { pdfioObjClose(obj); return (NULL); } } while (length > 0) { if (length > sizeof(buffer)) bytes = (ssize_t)sizeof(buffer); else bytes = (ssize_t)length; if ((bytes = read(fd, buffer, (size_t)bytes)) <= 0) { pdfioStreamClose(st); _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } crc = update_png_crc(crc, buffer, (size_t)bytes); if (!pdfioStreamWrite(st, buffer, (size_t)bytes)) { pdfioStreamClose(st); _pdfioFileError(dict->pdf, "Unable to copy image data."); return (NULL); } length -= bytes; } break; case _PDFIO_PNG_CHUNK_IEND : // Image end if (st) { pdfioStreamClose(st); return (obj); } break; case _PDFIO_PNG_CHUNK_IHDR : // Image header if (st) { pdfioStreamClose(st); _pdfioFileError(dict->pdf, "Unexpected image header."); return (NULL); } if (length != 13) { _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } if (read(fd, buffer, length) != length) { _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } crc = update_png_crc(crc, buffer, length); width = (unsigned)((buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3]); height = (unsigned)((buffer[4] << 24) | (buffer[5] << 16) | (buffer[6] << 8) | buffer[7]); bit_depth = buffer[8]; color_type = buffer[9]; if (width == 0 || height == 0 || (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && bit_depth != 8 && bit_depth != 16) || (color_type != _PDFIO_PNG_TYPE_GRAY && color_type != _PDFIO_PNG_TYPE_RGB && color_type != _PDFIO_PNG_TYPE_INDEXED) || buffer[10] || buffer[11] || buffer[12]) { _pdfioFileError(dict->pdf, "Unsupported PNG image."); return (NULL); } pdfioDictSetNumber(dict, "Width", width); pdfioDictSetNumber(dict, "Height", height); pdfioDictSetNumber(dict, "BitsPerComponent", bit_depth); pdfioDictSetName(dict, "Filter", "FlateDecode"); if ((decode = pdfioDictCreate(dict->pdf)) == NULL) return (NULL); pdfioDictSetNumber(decode, "BitsPerComponent", bit_depth); pdfioDictSetNumber(decode, "Colors", color_type == _PDFIO_PNG_TYPE_RGB ? 3 : 1); pdfioDictSetNumber(decode, "Columns", width); pdfioDictSetNumber(decode, "Predictor", _PDFIO_PREDICTOR_PNG_AUTO); pdfioDictSetDict(dict, "DecodeParms", decode); break; case _PDFIO_PNG_CHUNK_PLTE : // Palette if (length == 0 || (length % 3) != 0 || length > 768) { pdfioStreamClose(st); _pdfioFileError(dict->pdf, "Invalid color palette."); return (NULL); } if (read(fd, buffer, length) != length) { _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } crc = update_png_crc(crc, buffer, length); PDFIO_DEBUG("copy_png: Adding Indexed ColorSpace value.\n"); pdfioDictSetArray(dict, "ColorSpace", pdfioArrayCreateColorFromPalette(dict->pdf, length / 3, buffer)); break; case _PDFIO_PNG_CHUNK_cHRM : // Cromacities and white point if (length != 32) { _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } if (read(fd, buffer, length) != length) { _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } crc = update_png_crc(crc, buffer, length); wx = 0.00001 * ((buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3]); wy = 0.00001 * ((buffer[4] << 24) | (buffer[5] << 16) | (buffer[6] << 8) | buffer[7]); rx = 0.00001 * ((buffer[8] << 24) | (buffer[9] << 16) | (buffer[10] << 8) | buffer[11]); ry = 0.00001 * ((buffer[12] << 24) | (buffer[13] << 16) | (buffer[14] << 8) | buffer[15]); gx = 0.00001 * ((buffer[16] << 24) | (buffer[17] << 16) | (buffer[18] << 8) | buffer[19]); gy = 0.00001 * ((buffer[20] << 24) | (buffer[21] << 16) | (buffer[22] << 8) | buffer[23]); bx = 0.00001 * ((buffer[24] << 24) | (buffer[25] << 16) | (buffer[26] << 8) | buffer[27]); by = 0.00001 * ((buffer[28] << 24) | (buffer[29] << 16) | (buffer[30] << 8) | buffer[31]); break; case _PDFIO_PNG_CHUNK_gAMA : // Gamma correction if (length != 4) { _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } if (read(fd, buffer, length) != length) { _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } crc = update_png_crc(crc, buffer, length); gamma = 10000.0 / ((buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3]); break; case _PDFIO_PNG_CHUNK_tRNS : // Transparency information switch (color_type) { case _PDFIO_PNG_TYPE_INDEXED : if (length > 256) { _pdfioFileError(dict->pdf, "Bad transparency chunk in image file."); return (NULL); } if (read(fd, buffer, length) != length) { _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } for (i = 0; i < length; i ++) { if (!buffer[i]) break; } if (i < length) { if ((mask = pdfioArrayCreate(dict->pdf)) == NULL) return (NULL); pdfioArrayAppendNumber(mask, i); for (i ++; i < length; i ++) { if (buffer[i]) break; } pdfioArrayAppendNumber(mask, i - 1); } break; case _PDFIO_PNG_TYPE_GRAY : if (length != 2) { _pdfioFileError(dict->pdf, "Bad transparency chunk in image file."); return (NULL); } if (read(fd, buffer, length) != length) { _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } if ((mask = pdfioArrayCreate(dict->pdf)) == NULL) return (NULL); pdfioArrayAppendNumber(mask, buffer[1]); pdfioArrayAppendNumber(mask, buffer[1]); break; case _PDFIO_PNG_TYPE_RGB : if (length != 6) { _pdfioFileError(dict->pdf, "Bad transparency chunk in image file."); return (NULL); } if (read(fd, buffer, length) != length) { _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } if ((mask = pdfioArrayCreate(dict->pdf)) == NULL) return (NULL); pdfioArrayAppendNumber(mask, buffer[1]); pdfioArrayAppendNumber(mask, buffer[3]); pdfioArrayAppendNumber(mask, buffer[5]); pdfioArrayAppendNumber(mask, buffer[1]); pdfioArrayAppendNumber(mask, buffer[3]); pdfioArrayAppendNumber(mask, buffer[5]); break; } crc = update_png_crc(crc, buffer, length); if (mask) pdfioDictSetArray(dict, "Mask", mask); break; default : // Something else while (length > 0) { if (length > sizeof(buffer)) bytes = (ssize_t)sizeof(buffer); else bytes = (ssize_t)length; if ((bytes = read(fd, buffer, (size_t)bytes)) <= 0) { pdfioStreamClose(st); _pdfioFileError(dict->pdf, "Early end-of-file in image file."); return (NULL); } crc = update_png_crc(crc, buffer, (size_t)bytes); length -= bytes; } break; } // Verify the CRC... crc ^= 0xffffffff; if (read(fd, buffer, 4) != 4) { pdfioStreamClose(st); _pdfioFileError(dict->pdf, "Unable to read CRC."); return (NULL); } temp = (unsigned)((buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3]); if (temp != crc) { pdfioStreamClose(st); _pdfioFileError(dict->pdf, "Bad CRC (0x%08x != 0x%08x).", temp, crc); return (NULL); } } return (NULL); } // // 'create_cp1252()' - Create the CP1252 font encoding object. // static bool // O - `true` on success, `false` on failure create_cp1252(pdfio_file_t *pdf) // I - PDF file { int ch; // Current character bool chindex; // Need character index? pdfio_dict_t *cp1252_dict; // Encoding dictionary pdfio_array_t *cp1252_array; // Differences array static const char * const cp1252[] = // Glyphs for CP1252 encoding { "space", "exclam", "quotedbl", "numbersign", "dollar", "percent", "ampersand", "quotesingle", "parenleft", "parenright", "asterisk", "plus", "comma", "hyphen", "period", "slash", "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "colon", "semicolon", "less", "equal", "greater", "question", "at", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "bracketleft", "backslash", "bracketright", "asciicircum", "underscore", "grave", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "braceleft", "bar", "braceright", "asciitilde", "", "Euro", "", "quotesinglbase", "florin", "quotedblbase", "ellipsis", "dagger", "daggerdbl", "circumflex", "perthousand", "Scaron", "guilsinglleft", "OE", "", "Zcaron", "", "", "quoteleft", "quoteright", "quotedblleft", "quotedblright", "bullet", "endash", "emdash", "tilde", "trademark", "scaron", "guilsinglright", "oe", "", "zcaron", "Ydieresis", "space", "exclamdown", "cent", "sterling", "currency", "yen", "brokenbar", "section", "dieresis", "copyright", "ordfeminine", "guillemotleft", "logicalnot", "minus", "registered", "macron", "degree", "plusminus", "twosuperior", "threesuperior", "acute", "mu", "paragraph", "periodcentered", "cedilla", "onesuperior", "ordmasculine", "guillemotright", "onequarter", "onehalf", "threequarters", "questiondown", "Agrave", "Aacute", "Acircumflex", "Atilde", "Adieresis", "Aring", "AE", "Ccedilla", "Egrave", "Eacute", "Ecircumflex", "Edieresis", "Igrave", "Iacute", "Icircumflex", "Idieresis", "Eth", "Ntilde", "Ograve", "Oacute", "Ocircumflex", "Otilde", "Odieresis", "multiply", "Oslash", "Ugrave", "Uacute", "Ucircumflex", "Udieresis", "Yacute", "Thorn", "germandbls", "agrave", "aacute", "acircumflex", "atilde", "adieresis", "aring", "ae", "ccedilla", "egrave", "eacute", "ecircumflex", "edieresis", "igrave", "iacute", "icircumflex", "idieresis", "eth", "ntilde", "ograve", "oacute", "ocircumflex", "otilde", "odieresis", "divide", "oslash", "ugrave", "uacute", "ucircumflex", "udieresis", "yacute", "thorn", "ydieresis" }; if ((cp1252_dict = pdfioDictCreate(pdf)) == NULL || (cp1252_array = pdfioArrayCreate(pdf)) == NULL) return (false); for (ch = 0, chindex = true; ch < (int)(sizeof(cp1252) / sizeof(cp1252[0])); ch ++) { if (cp1252[ch][0]) { // Add this character... if (chindex) { // Add the initial index... pdfioArrayAppendNumber(cp1252_array, ch + 32); chindex = false; } pdfioArrayAppendName(cp1252_array, cp1252[ch]); } else { // Flag that we need a new index... chindex = true; } } pdfioDictSetName(cp1252_dict, "Type", "Encoding"); pdfioDictSetArray(cp1252_dict, "Differences", cp1252_array); if ((pdf->cp1252_obj = pdfioFileCreateObj(pdf, cp1252_dict)) == NULL) return (false); pdfioObjClose(pdf->cp1252_obj); return (true); } // // 'ttf_error_cb()' - Relay a message from the TTF functions. // static void ttf_error_cb(pdfio_file_t *pdf, // I - PDF file const char *message) // I - Error message { (pdf->error_cb)(pdf, message, pdf->error_data); } // // 'update_png_crc()' - Update the CRC-32 value for a PNG chunk. // static unsigned // O - CRC-32 value update_png_crc( unsigned crc, // I - CRC-32 value const unsigned char *buffer, // I - Buffer size_t length) // I - Length of buffer { while (length > 0) { crc = png_crc_table[(crc ^ *buffer) & 0xff] ^ (crc >> 8); buffer ++; length --; } return (crc); } // // 'write_string()' - Write a PDF string. // static bool // O - `true` on success, `false` otherwise write_string(pdfio_stream_t *st, // I - Stream bool unicode, // I - Unicode text? const char *s, // I - String bool *newline) // O - Ends with a newline? { int ch; // Unicode character const char *ptr; // Pointer into string // Start the string... if (!pdfioStreamPuts(st, unicode ? " 255) { // Try mapping from Unicode to CP1252... int i; // Looping var for (i = 0; i < (int)(sizeof(_pdfio_cp1252) / sizeof(_pdfio_cp1252[0])); i ++) { if (ch == _pdfio_cp1252[i]) { ch = i + 128; break; } } if (ch > 255) ch = '?'; // Unsupported chars map to ? } // Write the character... pdfioStreamPutChar(st, ch); } } } return (pdfioStreamPuts(st, unicode ? ">" : ")")); }