mirror of
https://github.com/michaelrsweet/pdfio.git
synced 2024-07-01 19:19:50 +02:00
c4e0421f62
color spaces and a new color patch test page. The grayscale test image from CUPS wasn't actually grayscale.
1373 lines
34 KiB
C
1373 lines
34 KiB
C
//
|
||
// Content helper functions for PDFio.
|
||
//
|
||
// Copyright © 2021 by Michael R Sweet.
|
||
//
|
||
// Licensed under Apache License v2.0. See the file "LICENSE" for more
|
||
// information.
|
||
//
|
||
|
||
//
|
||
// Include necessary headers...
|
||
//
|
||
|
||
#include "pdfio-content.h"
|
||
#include "pdfio-private.h"
|
||
#include <math.h>
|
||
|
||
|
||
//
|
||
// Global constants...
|
||
//
|
||
|
||
const double pdfioAdobeRGBGamma = 2.2;
|
||
const double pdfioAdobeRGBMatrix[3][3] = { { 0.57667, 0.18556, 0.18823 }, { 0.29734, 0.62736, 0.07529 }, { 0.02703, 0.07069, 0.99134 } };
|
||
const double pdfioAdobeRGBWhitePoint[3] = { 0.9505, 1.0, 1.0890 };
|
||
const double pdfioDisplayP3Gamma = 2.2;
|
||
const double pdfioDisplayP3Matrix[3][3] = { { 0.48657, 0.26567, 0.19822 }, {
|
||
0.22897, 0.69174, 0.07929 }, { 0.00000, 0.04511, 1.04394 } };
|
||
const double pdfioDisplayP3WhitePoint[3] = { 0.9505, 1.0, 1.0890 };
|
||
const double pdfioSRGBGamma = 2.2;
|
||
const double pdfioSRGBMatrix[3][3] = { { 0.4124, 0.3576, 0.1805 }, { 0.2126, 0.7152, 0.0722 }, { 0.0193, 0.1192, 0.9505 } };
|
||
const double pdfioSRGBWhitePoint[3] = { 0.9505, 1.0, 1.0890 };
|
||
|
||
//
|
||
// 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 pdfio_array_t *create_calcolor(pdfio_file_t *pdf, size_t num_colors, double gamma, const double matrix[3][3], const double white_point[3]);
|
||
static bool write_string(pdfio_stream_t *st, const char *s);
|
||
|
||
|
||
//
|
||
// 'pdfioContentBeginText()' - Begin a text block.
|
||
//
|
||
|
||
bool // O - `true` on success, `false` on failure
|
||
pdfioContentBeginText(
|
||
pdfio_stream_t *st) // I - Stream
|
||
{
|
||
return (pdfioStreamPuts(st, "BT\n"));
|
||
}
|
||
|
||
|
||
//
|
||
// '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));
|
||
}
|
||
|
||
|
||
//
|
||
// 'pdfioContentEndText()' - End a text block.
|
||
//
|
||
|
||
bool // O - `true` on success, `false` on failure
|
||
pdfioContentEndText(pdfio_stream_t *st) // I - Stream
|
||
{
|
||
return (pdfioStreamPuts(st, "ET\n"));
|
||
}
|
||
|
||
|
||
//
|
||
// '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(degrees / M_PI); // Cosine
|
||
double dsin = sin(degrees / M_PI); // 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));
|
||
}
|
||
|
||
|
||
//
|
||
// '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.
|
||
//
|
||
|
||
bool // O - `true` on success, `false` on failure
|
||
pdfioContentSetDashPattern(
|
||
pdfio_stream_t *st, // I - Stream
|
||
int phase, // I - Phase (offset within pattern)
|
||
int on, // I - On length
|
||
int off) // I - Off length
|
||
{
|
||
return (pdfioStreamPrintf(st, "[%d %d] %d 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"));
|
||
}
|
||
|
||
|
||
//
|
||
// '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.
|
||
//
|
||
|
||
bool // O - `true` on success, `false` on failure
|
||
pdfioContentTextShow(
|
||
pdfio_stream_t *st, // I - Stream
|
||
const char *s, // I - String to show
|
||
bool new_line) // I - Advance to the next line afterwards
|
||
{
|
||
write_string(st, s);
|
||
|
||
if (new_line)
|
||
return (pdfioStreamPuts(st, "\'\n"));
|
||
else
|
||
return (pdfioStreamPuts(st, "Tj\n"));
|
||
}
|
||
|
||
|
||
//
|
||
// 'pdfioContentTextShowJustified()' - Show justified text.
|
||
//
|
||
|
||
bool // O - `true` on success, `false` on failure
|
||
pdfioContentTextShowJustified(
|
||
pdfio_stream_t *st, // I - Stream
|
||
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, fragments[i]))
|
||
return (false);
|
||
}
|
||
}
|
||
|
||
return (pdfioStreamPuts(st, "]TJ\n"));
|
||
}
|
||
|
||
|
||
//
|
||
// 'pdfioPageDictAddICCColorSpace()' - Add an ICC color space to the page
|
||
// dictionary.
|
||
//
|
||
|
||
bool // O - `true` on success, `false` on failure
|
||
pdfioPageDictAddICCColorSpace(
|
||
pdfio_dict_t *dict, // I - Page dictionary
|
||
const char *name, // I - Color space name
|
||
pdfio_obj_t *obj) // I - ICC profile object
|
||
{
|
||
(void)dict;
|
||
(void)name;
|
||
(void)obj;
|
||
|
||
return (false);
|
||
}
|
||
|
||
|
||
//
|
||
// 'pdfioPageDictAddCalibratedColorSpace()' - Add a calibrated color space to
|
||
// the page dictionary.
|
||
//
|
||
|
||
bool // O - `true` on success, `false` on failure
|
||
pdfioPageDictAddCalibratedColorSpace(
|
||
pdfio_dict_t *dict, // I - Page dictionary
|
||
const char *name, // I - Color space name
|
||
size_t num_colors, // I - Number of color components
|
||
double gamma, // I - Gamma value
|
||
const double matrix[3][3], // I - Color transform matrix
|
||
const double white_point[3]) // I - CIE XYZ white point
|
||
{
|
||
pdfio_dict_t *resources; // Resource dictionary
|
||
pdfio_dict_t *colorspace; // ColorSpace dictionary
|
||
|
||
|
||
// Range check input...
|
||
if (!dict || !name || !num_colors || gamma <= 0.0)
|
||
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, create_calcolor(dict->pdf, num_colors, gamma, matrix, white_point)));
|
||
}
|
||
|
||
|
||
//
|
||
// '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
|
||
{
|
||
(void)dict;
|
||
(void)name;
|
||
(void)obj;
|
||
|
||
return (false);
|
||
}
|
||
|
||
|
||
//
|
||
// '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 (pdfioDictSetObject(xobject, name, obj));
|
||
}
|
||
|
||
|
||
//
|
||
// 'pdfioFileCreateFontObject()' - Add a font object to a PDF file.
|
||
//
|
||
|
||
pdfio_obj_t * // O - Object
|
||
pdfioFileCreateFontObject(
|
||
pdfio_file_t *pdf, // I - PDF file
|
||
const char *filename) // I - Filename
|
||
{
|
||
(void)pdf;
|
||
(void)filename;
|
||
|
||
return (NULL);
|
||
}
|
||
|
||
|
||
//
|
||
// 'pdfioFileCreateICCProfileObject()' - Add an ICC profile object to a PDF file.
|
||
//
|
||
|
||
pdfio_obj_t * // O - Object
|
||
pdfioFileCreateICCProfileObject(
|
||
pdfio_file_t *pdf, // I - PDF file
|
||
const char *filename) // I - Filename
|
||
{
|
||
(void)pdf;
|
||
(void)filename;
|
||
|
||
return (NULL);
|
||
}
|
||
|
||
|
||
//
|
||
// 'pdfioFileCreateImageObject()' - Add an image object to a PDF file.
|
||
//
|
||
// Currently only GIF, JPEG, and PNG files are supported.
|
||
//
|
||
|
||
pdfio_obj_t * // O - Object
|
||
pdfioFileCreateImageObject(
|
||
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);
|
||
}
|
||
|
||
|
||
//
|
||
// 'pdfioImageGetHeight()' - Get the height of an image object.
|
||
//
|
||
|
||
double // O - Height in lines
|
||
pdfioImageGetHeight(pdfio_obj_t *obj) // I - Image object
|
||
{
|
||
return (pdfioDictGetNumber(obj->value.value.dict, "Height"));
|
||
}
|
||
|
||
|
||
//
|
||
// 'pdfioImageGetWidth()' - Get the width of an image object.
|
||
//
|
||
|
||
double // O - Width in columns
|
||
pdfioImageGetWidth(pdfio_obj_t *obj) // I - Image object
|
||
{
|
||
return (pdfioDictGetNumber(obj->value.value.dict, "Width"));
|
||
}
|
||
|
||
|
||
//
|
||
// '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);
|
||
// TODO: Add proper JPEG CalRGB/Gray color spaces
|
||
pdfioDictSetArray(dict, "ColorSpace", create_calcolor(dict->pdf, num_colors, pdfioSRGBGamma, pdfioSRGBMatrix, pdfioSRGBWhitePoint));
|
||
pdfioDictSetName(dict, "Filter", "DCTDecode");
|
||
|
||
obj = pdfioFileCreateObject(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
|
||
{
|
||
// TODO: Implement copy_png
|
||
(void)dict;
|
||
(void)fd;
|
||
return (NULL);
|
||
}
|
||
|
||
|
||
//
|
||
// 'create_calcolor()' - Create a CalGray or CalRGB color array.
|
||
//
|
||
|
||
static pdfio_array_t * // O - Array
|
||
create_calcolor(
|
||
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
|
||
|
||
|
||
// 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);
|
||
}
|
||
|
||
|
||
//
|
||
// 'write_string()' - Write a PDF string.
|
||
//
|
||
|
||
static bool // O - `true` on success, `false` otherwise
|
||
write_string(pdfio_stream_t *st, // I - Stream
|
||
const char *s) // I - String
|
||
{
|
||
const char *ptr; // Pointer into string
|
||
|
||
|
||
// Determine whether this is Unicode or just ASCII...
|
||
for (ptr = s; *ptr; ptr ++)
|
||
{
|
||
if (*ptr & 0x80)
|
||
break;
|
||
}
|
||
|
||
if (*ptr)
|
||
{
|
||
// Unicode string...
|
||
int ch; // Unicode character
|
||
|
||
if (!pdfioStreamPuts(st, "("))
|
||
return (false);
|
||
|
||
for (ptr = s; *ptr; ptr ++)
|
||
{
|
||
if ((*ptr & 0xe0) == 0xc0)
|
||
{
|
||
// Two-byte UTF-8
|
||
ch = ((ptr[0] & 0x1f) << 6) | (ptr[1] & 0x3f);
|
||
ptr ++;
|
||
}
|
||
else if ((*ptr & 0xf0) == 0xe0)
|
||
{
|
||
// Three-byte UTF-8
|
||
ch = ((ptr[0] & 0x0f) << 12) | ((ptr[1] & 0x3f) << 6) | (ptr[2] & 0x3f);
|
||
ptr += 2;
|
||
}
|
||
else if ((*ptr & 0xf8) == 0xf0)
|
||
{
|
||
// Four-byte UTF-8
|
||
ch = ((ptr[0] & 0x07) << 18) | ((ptr[1] & 0x3f) << 12) | ((ptr[2] & 0x3f) << 6) | (ptr[3] & 0x3f);
|
||
ptr += 3;
|
||
}
|
||
else
|
||
ch = *ptr & 255;
|
||
|
||
// Write a two-byte character...
|
||
if (!pdfioStreamPrintf(st, "%04X", ch))
|
||
return (false);
|
||
}
|
||
if (!pdfioStreamPuts(st, ")"))
|
||
return (false);
|
||
}
|
||
else
|
||
{
|
||
// ASCII string...
|
||
const char *start = s; // Start of fragment
|
||
int level = 0; // Paren level
|
||
|
||
if (!pdfioStreamPuts(st, "("))
|
||
return (false);
|
||
|
||
for (ptr = start; *ptr; ptr ++)
|
||
{
|
||
if (*ptr == '\\' || (*ptr == ')' && level == 0) || *ptr < ' ')
|
||
{
|
||
if (ptr > start)
|
||
{
|
||
if (!pdfioStreamWrite(st, start, (size_t)(ptr - start)))
|
||
return (false);
|
||
|
||
start = ptr + 1;
|
||
}
|
||
|
||
if (*ptr < ' ')
|
||
{
|
||
if (!pdfioStreamPrintf(st, "\\%03o", *ptr))
|
||
return (false);
|
||
}
|
||
else if (!pdfioStreamPrintf(st, "\\%c", *ptr))
|
||
return (false);
|
||
}
|
||
else if (*ptr == '(')
|
||
level ++;
|
||
else if (*ptr == ')')
|
||
level --;
|
||
}
|
||
|
||
if (ptr > start)
|
||
{
|
||
if (!pdfioStreamPrintf(st, "%s)", start))
|
||
return (false);
|
||
}
|
||
else if (!pdfioStreamPuts(st, ")"))
|
||
return (false);
|
||
}
|
||
|
||
return (true);
|
||
}
|