print.c

Gqview,Linux下基于GTK+库写成的轻量级而能丰富的图像浏览程序。

/*
 * GQview
 * (C) 2004 John Ellis
 *
 * Author: John Ellis
 *
 * This software is released under the GNU General Public License (GNU GPL).
 * Please read the included file COPYING for more information.
 * This software comes with no warranty of any kind, use at your own risk!
 */


#include "gqview.h"
#include "print.h"

#include "filelist.h"
#include "image.h"
#include "image-load.h"
#include "pixbuf_util.h"
#include "thumb.h"
#include "utilops.h"
#include "ui_bookmark.h"
#include "ui_menu.h"
#include "ui_misc.h"
#include "ui_utildlg.h"
#include "ui_fileops.h"
#include "ui_spinner.h"
#include "ui_tabcomp.h"


#include <locale.h>
#include <signal.h>


#define PRINT_LPR_COMMAND "lpr"
#define PRINT_LPR_CUSTOM  "lpr -P %s"
#define PRINT_LPR_QUERY   "lpstat -p"

#define PRINT_DLG_WIDTH 600
#define PRINT_DLG_HEIGHT 400

#define PRINT_DLG_PREVIEW_WIDTH 270
#define PRINT_DLG_PREVIEW_HEIGHT -1

/* these are in point units */
#define PRINT_MIN_WIDTH 100
#define PRINT_MIN_HEIGHT 100
#define PRINT_MAX_WIDTH 4000
#define PRINT_MAX_HEIGHT 4000

#define PRINT_MARGIN_DEFAULT 36

#define PRINT_PROOF_MIN_SIZE 8
#define PRINT_PROOF_MAX_SIZE 720
#define PRINT_PROOF_DEFAULT_SIZE 144
#define PRINT_PROOF_MARGIN 5

/* default page size */
#define PAGE_LAYOUT_WIDTH 850
#define PAGE_LAYOUT_HEIGHT 1100

/* preview uses 1 pixel = PRINT_PREVIEW_SCALE points */
#define PRINT_PREVIEW_SCALE 4

/* default dpi to use for printing ps image data */
#define PRINT_PS_DPI_DEFAULT 300.0
#define PRINT_PS_DPI_MIN 150.0
/* method to use when scaling down image data */
#define PRINT_PS_MAX_INTERP GDK_INTERP_BILINEAR

/* padding between objects */
#define PRINT_TEXT_PADDING 3.0

/* locale for postscript portability */
#define POSTSCRIPT_LOCALE "C"


/* group and keys for saving prefs */
#define PRINT_PREF_GROUP	"print_settings"

#define PRINT_PREF_SAVE		"save_settings"

#define PRINT_PREF_OUTPUT	"output"
#define PRINT_PREF_FORMAT	"format"
#define PRINT_PREF_DPI		"dpi"
#define PRINT_PREF_UNITS	"units"
#define PRINT_PREF_SIZE		"size"
#define PRINT_PREF_ORIENTATION	"orientation"

#define PRINT_PREF_CUSTOM_WIDTH		"custom_width"
#define PRINT_PREF_CUSTOM_HEIGHT	"custom_height"
#define PRINT_PREF_MARGIN_LEFT		"margin_left"
#define PRINT_PREF_MARGIN_RIGHT		"margin_right"
#define PRINT_PREF_MARGIN_TOP		"margin_top"
#define PRINT_PREF_MARGIN_BOTTOM	"margin_bottom"
#define PRINT_PREF_PROOF_WIDTH		"proof_width"
#define PRINT_PREF_PROOF_HEIGHT		"proof_height"

#define PRINT_PREF_PRINTERC	"custom_printer"


typedef enum {
	PRINT_SOURCE_IMAGE = 0,
	PRINT_SOURCE_SELECTION,
	PRINT_SOURCE_ALL,
	PRINT_SOURCE_COUNT
} PrintSource;

const gchar *print_source_text[] = {
	N_("Image"),
	N_("Selection"),
	N_("All"),
	NULL
};

typedef enum {
	PRINT_LAYOUT_IMAGE = 0,
	PRINT_LAYOUT_PROOF,
	PRINT_LAYOUT_COUNT
} PrintLayout;

const gchar *print_layout_text[] = {
	N_("One image per page"),
	N_("Proof sheet"),
	NULL
};

typedef enum {
	PRINT_OUTPUT_PS_LPR = 0,
	PRINT_OUTPUT_PS_CUSTOM,
	PRINT_OUTPUT_PS_FILE,
	PRINT_OUTPUT_RGB_FILE,
	PRINT_OUTPUT_COUNT
} PrintOutput;

const gchar *print_output_text[] = {
	N_("Default printer"),
	N_("Custom printer"),
	N_("PostScript file"),
	N_("Image file"),
	NULL,
	NULL
};

typedef enum {
	PRINT_FILE_JPG_LOW = 0,
	PRINT_FILE_JPG_NORMAL,
	PRINT_FILE_JPG_HIGH,
	PRINT_FILE_PNG,
	PRINT_FILE_COUNT
} PrintFileFormat;

const gchar *print_file_format_text[] = {
	N_("jpeg, low quality"),
	N_("jpeg, normal quality"),
	N_("jpeg, high quality"),
	"png",
	NULL
};

typedef enum {
	RENDER_FORMAT_PREVIEW,
	RENDER_FORMAT_RGB,
	RENDER_FORMAT_PS
} RenderFormat;

typedef enum {
	TEXT_INFO_FILENAME = 1 << 0,
	TEXT_INFO_FILEDATE = 1 << 1,
	TEXT_INFO_FILESIZE = 1 << 2,
	TEXT_INFO_DIMENSIONS = 1 << 3
} TextInfo;

typedef struct _PrintWindow PrintWindow;
struct _PrintWindow
{
	GenericDialog *dialog;

	gchar *source_path;
	GList *source_selection;
	GList *source_list;

	PrintSource source;
	PrintLayout layout;
	PrintOutput output;

	gchar *output_path;
	gchar *output_custom;

	PrintFileFormat output_format;

	gdouble max_dpi;

	GtkWidget *notebook;

	GtkWidget *path_entry;
	GtkWidget *custom_entry;
	GtkWidget *path_format_menu;
	GtkWidget *max_dpi_menu;

	ImageWindow *layout_image;
	gdouble layout_width;
	gdouble layout_height;

	gint layout_idle_id;

	gint image_scale;

	GtkWidget *image_scale_spin;

	gdouble proof_width;
	gdouble proof_height;
	gint proof_columns;
	gint proof_rows;
	GList *proof_point;
	gint proof_position;
	gint proof_page;

	GtkWidget *proof_group;
	GtkWidget *proof_width_spin;
	GtkWidget *proof_height_spin;

	GtkWidget *paper_menu;
	GtkWidget *paper_width_spin;
	GtkWidget *paper_height_spin;
	GtkWidget *paper_units_menu;
	GtkWidget *paper_orientation_menu;

	GtkWidget *margin_left_spin;
	GtkWidget *margin_right_spin;
	GtkWidget *margin_top_spin;
	GtkWidget *margin_bottom_spin;

	gint paper_units;
	gint paper_size;
	gdouble paper_width;
	gdouble paper_height;
	gint paper_orientation;

	gdouble margin_left;
	gdouble margin_right;
	gdouble margin_top;
	gdouble margin_bottom;

	GtkWidget *button_back;
	GtkWidget *button_next;
	GtkWidget *page_label;
	GtkWidget *print_button;

	gdouble single_scale;
	gdouble single_x;
	gdouble single_y;

	GtkWidget *single_scale_spin;

	TextInfo	text_fields;
	gint		text_points;
	guint8		text_r;
	guint8		text_g;
	guint8		text_b;

	gint save_settings;

	/* job printing */

	GenericDialog	*job_dialog;
	GtkWidget	*job_progress;
	GtkWidget	*job_progress_label;

	RenderFormat	 job_format;
	PrintOutput	 job_output;

	FILE		*job_file;
	FILE 		*job_pipe;
	gchar		*job_path;

	GdkPixbuf	*job_pixbuf;

	gint		 job_page;
	ImageLoader	*job_loader;
};


static void print_job_throw_error(PrintWindow *pw, const gchar *message);
static gint print_job_start(PrintWindow *pw, RenderFormat format, PrintOutput output);
static void print_job_close(PrintWindow *pw, gint error);
static void print_window_close(PrintWindow *pw);


/* misc utils */

static gint clip_region(gdouble x1, gdouble y1, gdouble w1, gdouble h1,
			gdouble x2, gdouble y2, gdouble w2, gdouble h2,
			gdouble *rx, gdouble *ry, gdouble *rw, gdouble *rh)
{
	if (x2 + w2 <= x1 || x2 >= x1 + w1 ||
	    y2 + h2 <= y1 || y2 >= y1 + h1)
		{
		return FALSE;
		}

	*rx = MAX(x1, x2);
	*rw = MIN((x1 + w1), (x2 + w2)) - *rx;

	*ry = MAX(y1, y2);
	*rh = MIN((y1 + h1), (y2 + h2)) - *ry;

	return TRUE;
}

static const gchar *print_output_name(PrintOutput output)
{
	if (output < 0 || output >= PRINT_OUTPUT_COUNT) return "";

	return _(print_output_text[output]);
}


/*
 *-----------------------------------------------------------------------------
 * data
 *-----------------------------------------------------------------------------
 */


typedef enum {
	PAPER_UNIT_POINTS = 0,
	PAPER_UNIT_MM,
	PAPER_UNIT_CM,
	PAPER_UNIT_INCH,
	PAPER_UNIT_PICAS,
	PAPER_UNIT_COUNT
} PaperUnits;

typedef enum {
	PAPER_ORIENTATION_PORTRAIT = 0,
	PAPER_ORIENTATION_LANDSCAPE,
	PAPER_ORIENTATION_COUNT
} PaperOrientation;

typedef struct _PaperSize PaperSize;
struct _PaperSize {
	gchar *description;
	gint width;
	gint height;
	PaperOrientation orientation;
};

const gchar *print_paper_units[] = {
	N_("points"),
	N_("millimeters"),
	N_("centimeters"),
	N_("inches"),
	N_("picas"),
	NULL
};

const gchar *print_paper_orientation[] = {
	N_("Portrait"),
	N_("Landscape"),
	NULL
};

PaperSize print_paper_sizes[] = {
	{ N_("Custom"),		360,	720,	PAPER_ORIENTATION_PORTRAIT },
	{ N_("Letter"),		612,	792,	PAPER_ORIENTATION_PORTRAIT },	/* in 8.5 x 11 */
	{ N_("Legal"),		612,	1008,	PAPER_ORIENTATION_PORTRAIT },	/* in 8.5 x 14 */
	{ N_("Executive"),	522,	756,	PAPER_ORIENTATION_PORTRAIT },	/* in 7.25x 10.5 */
	{ "A0",			2384,	3370,	PAPER_ORIENTATION_PORTRAIT },	/* mm 841 x 1189 */
	{ "A1",			1684,	2384,	PAPER_ORIENTATION_PORTRAIT },	/* mm 594 x 841 */
	{ "A2",			1191,	1684,	PAPER_ORIENTATION_PORTRAIT },	/* mm 420 x 594 */
	{ "A3",			842,	1191,	PAPER_ORIENTATION_PORTRAIT },	/* mm 297 x 420 */
	{ "A4",			595,	842,	PAPER_ORIENTATION_PORTRAIT },	/* mm 210 x 297 */
	{ "A5",			420,	595,	PAPER_ORIENTATION_PORTRAIT },	/* mm 148 x 210 */
	{ "A6",			298,	420,	PAPER_ORIENTATION_PORTRAIT },	/* mm 105 x 148 */
	{ "B3",			1001,	1417,	PAPER_ORIENTATION_PORTRAIT },	/* mm 353 x 500 */
	{ "B4",			709,	1001,	PAPER_ORIENTATION_PORTRAIT },	/* mm 250 x 353 */
	{ "B5",			499,	709,	PAPER_ORIENTATION_PORTRAIT },	/* mm 176 x 250 */
	{ "B6",			354,	499,	PAPER_ORIENTATION_PORTRAIT },	/* mm 125 x 176 */
	{ N_("Envelope #10"),	297,	684,	PAPER_ORIENTATION_LANDSCAPE },	/* in 4.125 x 9.5 */
	{ N_("Envelope #9"),	279,	639,	PAPER_ORIENTATION_LANDSCAPE },	/* in 3.875 x 8.875 */
	{ N_("Envelope C4"),	649,	918,	PAPER_ORIENTATION_LANDSCAPE },	/* mm 229 x 324 */
	{ N_("Envelope C5"),	459,	649,	PAPER_ORIENTATION_LANDSCAPE },	/* mm 162 x 229 */
	{ N_("Envelope C6"),	323,	459,	PAPER_ORIENTATION_LANDSCAPE },	/* mm 114 x 162 */
	{ N_("Photo 6x4"),	432,	288,	PAPER_ORIENTATION_PORTRAIT },	/* in 6   x 4 */
	{ N_("Photo 8x10"),	576,	720,	PAPER_ORIENTATION_PORTRAIT },	/* in 8   x 10 */
	{ N_("Postcard"),	284,	419,	PAPER_ORIENTATION_LANDSCAPE },	/* mm 100 x 148 */
	{ N_("Tabloid"),	792,	1224,	PAPER_ORIENTATION_PORTRAIT },	/* in 11  x 17 */
	{ NULL, 0, 0, 0 }
};


static PaperSize *print_paper_size_nth(gint n)
{
	PaperSize *ps = NULL;
	gint i = 0;

	while (i <= n && print_paper_sizes[i].description)
		{
		ps = &print_paper_sizes[i];
		i++;
		}

	return ps;
}

static gint print_paper_size_lookup(gint n, gdouble *width, gdouble *height)
{
	PaperSize *ps;
	gdouble w, h;

	ps = print_paper_size_nth(n);
	if (!ps) return FALSE;

	if (ps->orientation == PAPER_ORIENTATION_PORTRAIT)
		{
		w = ps->width;
		h = ps->height;
		}
	else
		{
		h = ps->width;
		w = ps->height;
		}

	if (width) *width = w;
	if (height) *height = h;

	return TRUE;
}

static gdouble print_paper_size_convert_units(gdouble value, PaperUnits src, PaperUnits dst)
{
	gdouble ret;

	if (src == dst) return value;

	switch (src)
		{
		case PAPER_UNIT_MM:
			ret = value / 25.4 * 72.0;
			break;
		case PAPER_UNIT_CM:
			ret = value / 2.54 * 72.0;
			break;
		case PAPER_UNIT_INCH:
			ret = value * 72.0;
			break;
		case PAPER_UNIT_PICAS:
			ret = value * 12.0;
			break;
		case PAPER_UNIT_POINTS:
		default:
			ret = value;
			break;
		}

	switch (dst)
		{
		case PAPER_UNIT_MM:
			ret = ret / 72.0 * 25.4;
			break;
		case PAPER_UNIT_CM:
			ret = ret / 72.0 * 2.54;
			break;
		case PAPER_UNIT_INCH:
			ret = ret / 72.0;
			break;
		case PAPER_UNIT_PICAS:
			ret = ret / 12.0;
			break;
		case PAPER_UNIT_POINTS:
		default:
			break;
		}

	return ret;
}

static PaperUnits paper_unit_default(void)
{
	const char *result;
#if 0
	/* this is not used because it is not even slightly portable */
	#include <langinfo.h>

	result = nl_langinfo(_NL_MEASUREMENT_MEASUREMENT);
	if (result[0] == '2') return PAPER_UNIT_INCH;
#endif

#ifdef LC_MEASUREMENT
	result = setlocale(LC_MEASUREMENT, NULL);
#else
	result = setlocale(LC_ALL, NULL);
#endif
	if (result &&
	    (strstr(result, "_US") || strstr(result, "_PR")) )
		{
		return PAPER_UNIT_INCH;
		}

	return PAPER_UNIT_CM;
}

/*
 *-----------------------------------------------------------------------------
 * the layout window
 *-----------------------------------------------------------------------------
 */

static gint print_layout_page_count(PrintWindow *pw);


static gint print_preview_unit(gdouble points)
{
	return (int)(points / PRINT_PREVIEW_SCALE);
}

static void print_proof_size(PrintWindow *pw, gdouble *width, gdouble *height)
{
	if (width) *width = pw->proof_width + PRINT_PROOF_MARGIN * 2;
	if (height)
		{
		gdouble h;

		h = pw->proof_height + PRINT_PROOF_MARGIN * 2;
		if (pw->text_fields != 0) h += PRINT_TEXT_PADDING;
		if (pw->text_fields & TEXT_INFO_FILENAME) h+= (gdouble)pw->text_points * 1.25;
		if (pw->text_fields & TEXT_INFO_DIMENSIONS) h+= (gdouble)pw->text_points * 1.25;
		if (pw->text_fields & TEXT_INFO_FILEDATE) h+= (gdouble)pw->text_points * 1.25;
		if (pw->text_fields & TEXT_INFO_FILESIZE) h+= (gdouble)pw->text_points * 1.25;
		*height = h;
		}
}

static void print_window_layout_status(PrintWindow *pw)
{
	gint total;
	gchar *buf;

	total = print_layout_page_count(pw);
	pw->proof_page = CLAMP(pw->proof_page, 0, total - 1);

	buf = g_strdup_printf(_("page %d of %d"), pw->proof_page + 1, (total > 0) ? total : 1);
	gtk_label_set_text(GTK_LABEL(pw->page_label), buf);
	g_free(buf);

	gtk_widget_set_sensitive(pw->page_label, (total > 0));

	gtk_widget_set_sensitive(pw->button_back, (pw->proof_page > 0));
	gtk_widget_set_sensitive(pw->button_next, (pw->proof_page < total - 1));

	gtk_widget_set_sensitive(pw->print_button, total > 0);
}

static void print_window_layout_render_stop(PrintWindow *pw)
{
	if (pw->layout_idle_id != -1)
		{
		g_source_remove(pw->layout_idle_id);
		pw->layout_idle_id = -1;
		}