diff options
Diffstat (limited to 'examples/renderdemo.c')
| -rw-r--r-- | examples/renderdemo.c | 508 |
1 files changed, 0 insertions, 508 deletions
diff --git a/examples/renderdemo.c b/examples/renderdemo.c deleted file mode 100644 index e225fe7e..00000000 --- a/examples/renderdemo.c +++ /dev/null @@ -1,508 +0,0 @@ -/* renderdemo.c: Common code for rendering demos - * - * Copyright (C) 1999, 2004 Red Hat Software - * Copyright (C) 2001 Sun Microsystems - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#define DEFAULT_FONT_FAMILY "Sans" -#define DEFAULT_FONT_SIZE 18 - -#include <errno.h> -#include <math.h> -#include <stdarg.h> -#include <stdlib.h> -#include <stdio.h> -#include <string.h> - -#include "argcontext.h" - -#include <pango/pango.h> - -#include "renderdemo.h" - -#define _MAKE_FONT_NAME(family, size) family " " #size -#define MAKE_FONT_NAME(family, size) _MAKE_FONT_NAME(family, size) - -const char *prog_name; - -gboolean opt_display = FALSE; -int opt_dpi = 96; -const char *opt_font = MAKE_FONT_NAME (DEFAULT_FONT_FAMILY, DEFAULT_FONT_SIZE); -gboolean opt_header = FALSE; -const char *opt_output = NULL; -int opt_margin = 10; -int opt_markup = FALSE; -gboolean opt_rtl = FALSE; -int opt_rotate = 0; -gboolean opt_auto_dir = TRUE; -const char *opt_text = NULL; -gboolean opt_waterfall = FALSE; -int opt_width = -1; -int opt_indent = 0; -int opt_runs = 1; -PangoEllipsizeMode opt_ellipsize = PANGO_ELLIPSIZE_NONE; -HintMode opt_hinting = HINT_DEFAULT; -const char *opt_pangorc = NULL; - -/* Text (or markup) to render */ -static char *text; - -void -fail (const char *format, ...) -{ - const char *msg; - - va_list vap; - va_start (vap, format); - msg = g_strdup_vprintf (format, vap); - g_printerr ("%s: %s\n", prog_name, msg); - - exit (1); -} - -static PangoFontDescription * -get_font_description (void) -{ - PangoFontDescription *font_description = pango_font_description_from_string (opt_font); - - if ((pango_font_description_get_set_fields (font_description) & PANGO_FONT_MASK_FAMILY) == 0) - pango_font_description_set_family (font_description, DEFAULT_FONT_FAMILY); - - if ((pango_font_description_get_set_fields (font_description) & PANGO_FONT_MASK_SIZE) == 0) - pango_font_description_set_size (font_description, DEFAULT_FONT_SIZE * PANGO_SCALE); - - return font_description; -} - -static PangoLayout * -make_layout(PangoContext *context, - const char *text, - double size) -{ - static PangoFontDescription *font_description; - PangoDirection base_dir; - PangoLayout *layout; - - layout = pango_layout_new (context); - if (opt_markup) - pango_layout_set_markup (layout, text, -1); - else - pango_layout_set_text (layout, text, -1); - - pango_layout_set_auto_dir (layout, opt_auto_dir); - pango_layout_set_ellipsize (layout, opt_ellipsize); - - font_description = get_font_description (); - if (size > 0) - pango_font_description_set_size (font_description, size * PANGO_SCALE); - - if (opt_width > 0) - { - pango_layout_set_wrap (layout, PANGO_WRAP_WORD_CHAR); - pango_layout_set_width (layout, (opt_width * opt_dpi * PANGO_SCALE + 32) / 72); - } - - if (opt_indent != 0) - pango_layout_set_indent (layout, (opt_indent * opt_dpi * PANGO_SCALE + 32) / 72); - - base_dir = pango_context_get_base_dir (context); - pango_layout_set_alignment (layout, - base_dir == PANGO_DIRECTION_LTR ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT); - - pango_layout_set_font_description (layout, font_description); - - pango_font_description_free (font_description); - - return layout; -} - -gchar * -get_options_string (void) -{ - PangoFontDescription *font_description = get_font_description (); - gchar *font_name; - gchar *result; - - if (opt_waterfall) - pango_font_description_unset_fields (font_description, PANGO_FONT_MASK_SIZE); - - font_name = pango_font_description_to_string (font_description); - result = g_strdup_printf ("%s: dpi=%d", font_name, opt_dpi); - pango_font_description_free (font_description); - g_free (font_name); - - return result; -} - -static void -transform_point (PangoMatrix *matrix, - double x_in, - double y_in, - double *x_out, - double *y_out) -{ - *x_out = x_in * matrix->xx + y_in * matrix->xy + matrix->x0; - *y_out = x_in * matrix->yx + y_in * matrix->yy + matrix->y0; -} - -static void -output_body (PangoContext *context, - const char *text, - RenderCallback render_cb, - gpointer cb_data, - int *width, - int *height) -{ - PangoLayout *layout; - PangoRectangle logical_rect; - int size, start_size, end_size, increment; - int dy; - - if (opt_waterfall) - { - start_size = 8; - end_size = 48; - increment = 4; - } - else - { - start_size = end_size = -1; - increment = 1; - } - - *width = 0; - *height = 0; - dy = 0; - - for (size = start_size; size <= end_size; size += increment) - { - layout = make_layout (context, text, size); - pango_layout_get_extents (layout, NULL, &logical_rect); - - *width = MAX (*width, PANGO_PIXELS (logical_rect.width)); - *height += PANGO_PIXELS (logical_rect.height); - - if (render_cb) - (*render_cb) (layout, 0, dy, cb_data); - - dy += PANGO_PIXELS (logical_rect.height); - - g_object_unref (layout); - } -} - -static void -set_transform (PangoContext *context, - TransformCallback transform_cb, - gpointer cb_data, - PangoMatrix *matrix) -{ - if (transform_cb) - (*transform_cb) (context, matrix, cb_data); - else - pango_context_set_matrix (context, matrix); -} - -void -do_output (PangoContext *context, - RenderCallback render_cb, - TransformCallback transform_cb, - gpointer cb_data, - int *width_out, - int *height_out) -{ - PangoLayout *layout; - PangoRectangle logical_rect; - PangoMatrix matrix = PANGO_MATRIX_INIT; - int rotated_width, rotated_height; - int x = opt_margin; - int y = opt_margin; - double p1x, p1y; - double p2x, p2y; - double p3x, p3y; - double p4x, p4y; - double minx, miny; - double maxx, maxy; - int width, height; - - width = 0; - height = 0; - - set_transform (context, transform_cb, cb_data, NULL); - - pango_context_set_language (context, pango_language_from_string ("en_US")); - pango_context_set_base_dir (context, - opt_rtl ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR); - - if (opt_header) - { - char *options_string = get_options_string (); - layout = make_layout (context, options_string, 10); - pango_layout_get_extents (layout, NULL, &logical_rect); - - width = MAX (width, PANGO_PIXELS (logical_rect.width)); - height += PANGO_PIXELS (logical_rect.height); - - if (render_cb) - (*render_cb) (layout, x, y, cb_data); - - y += PANGO_PIXELS (logical_rect.height); - - g_object_unref (layout); - g_free (options_string); - } - - pango_matrix_rotate (&matrix, opt_rotate); - - set_transform (context, transform_cb, cb_data, &matrix); - - output_body (context, text, NULL, NULL, &rotated_width, &rotated_height); - - transform_point (&matrix, 0, 0, &p1x, &p1y); - transform_point (&matrix, rotated_width, 0, &p2x, &p2y); - transform_point (&matrix, rotated_width, rotated_height, &p3x, &p3y); - transform_point (&matrix, 0, rotated_height, &p4x, &p4y); - - minx = MIN (MIN (p1x, p2x), MIN (p3x, p4x)); - miny = MIN (MIN (p1y, p2y), MIN (p3y, p4y)); - - maxx = MAX (MAX (p1x, p2x), MAX (p3x, p4x)); - maxy = MAX (MAX (p1y, p2y), MAX (p3y, p4y)); - - matrix.x0 = x - minx; - matrix.y0 = y - miny; - - set_transform (context, transform_cb, cb_data, &matrix); - - if (render_cb) - output_body (context, text, render_cb, cb_data, &rotated_width, &rotated_height); - - width = MAX (width, maxx - minx); - height += maxy - miny; - - width += 2 * opt_margin; - height += 2 * opt_margin; - - if (width_out) - *width_out = width; - if (height_out) - *height_out = height; -} - -static void -show_help (ArgContext *context, - const char *name, - const char *arg, - gpointer data) G_GNUC_NORETURN; - -static void -show_help (ArgContext *context, - const char *name, - const char *arg, - gpointer data) -{ - g_print ("%s - An example viewer for Pango\n" - "\n" - "Syntax:\n" - " %s [options] FILE\n" - "\n" - "Options:\n", - prog_name, prog_name); - arg_context_print_help (context); - exit (0); -} - -/* This function gets called to convert a matched pattern into what - * we'll use to actually load the font. We turn off hinting since we - * want metrics that are independent of scale. - */ -void -fc_substitute_func (FcPattern *pattern, gpointer data) -{ - if (opt_hinting != HINT_DEFAULT) - { - FcPatternDel (pattern, FC_HINTING); - FcPatternAddBool (pattern, FC_HINTING, opt_hinting != HINT_NONE); - - FcPatternDel (pattern, FC_AUTOHINT); - FcPatternAddBool (pattern, FC_AUTOHINT, opt_hinting == HINT_AUTO); - } -} - -static void -parse_ellipsis (ArgContext *arg_context, - const char *name, - const char *arg, - gpointer data) -{ - static GEnumClass *class = NULL; - GEnumValue *value; - - if (!class) - class = g_type_class_ref (PANGO_TYPE_ELLIPSIZE_MODE); - - value = g_enum_get_value_by_nick (class, arg); - if (!value) - fail ("--ellipsize option must be one of none/start/middle/end"); - - opt_ellipsize = value->value; -} - -static void -parse_hinting (ArgContext *arg_context, - const char *name, - const char *arg, - gpointer data) -{ - static GEnumClass *class = NULL; - - if (!class) - class = g_type_class_ref (PANGO_TYPE_ELLIPSIZE_MODE); - - if (strcmp (arg, "none") == 0) - opt_hinting = HINT_NONE; - else if (strcmp (arg, "auto") == 0) - opt_hinting = HINT_AUTO; - else if (strcmp (arg, "full") == 0) - opt_hinting = HINT_FULL; - else - fail ("--hinting option must be one of none/auto/full"); -} - -void -parse_options (int argc, char *argv[]) -{ - static const ArgDesc args[] = { - { "no-auto-dir","Don't set layout direction according to contents", - ARG_NOBOOL, &opt_auto_dir, NULL }, - { "display", "Show output using ImageMagick", - ARG_BOOL, &opt_display, NULL }, - { "dpi", "Set the dpi'", - ARG_INT, &opt_dpi, NULL }, - { "ellipsize", "Ellipsization mode [=none/start/middle/end]", - ARG_CALLBACK, NULL, parse_ellipsis }, - { "font", "Set the font name", - ARG_STRING, &opt_font, NULL }, - { "header", "Display the options in the output", - ARG_BOOL, &opt_header, NULL }, - { "help", "Show this output", - ARG_CALLBACK, NULL, show_help }, - { "hinting", "Hinting style [=none/auto/full]", - ARG_CALLBACK, NULL, parse_hinting }, - { "margin", "Set the margin on the output in pixels", - ARG_INT, &opt_margin, NULL }, - { "markup", "Interpret contents as Pango markup", - ARG_BOOL, &opt_markup, NULL }, - { "output", "Name of output file", - ARG_STRING, &opt_output, NULL }, - { "rtl", "Set base dir to RTL", - ARG_BOOL, &opt_rtl, NULL }, - { "rotate", "Angle at which to rotate results", - ARG_INT, &opt_rotate, NULL }, - { "text", "Text to display (instead of a file)", - ARG_STRING, &opt_text, NULL }, - { "waterfall", "Create a waterfall display", - ARG_BOOL, &opt_waterfall, NULL }, - { "width", "Width in points to which to wrap output", - ARG_INT, &opt_width, NULL }, - { "indent", "Width in points to indent paragraphs", - ARG_INT, &opt_indent, NULL }, - { "runs", "Render text this many times", - ARG_INT, &opt_runs, NULL }, - { "pangorc", "pangorc file to use (default is ./pangorc if available)", - ARG_STRING, &opt_pangorc, NULL }, - { NULL, NULL, 0, NULL, NULL } - }; - - ArgContext *arg_context; - GError *error = NULL; - size_t len; - char *p; - - prog_name = g_path_get_basename (argv[0]); - - arg_context = arg_context_new (NULL); - arg_context_add_table (arg_context, args); - - if (!arg_context_parse (arg_context, &argc, &argv, &error)) - fail ("%s", error->message); - - arg_context_free (arg_context); - - if ((opt_text && argc != 1) || - (!opt_text && argc != 2)) - { - if (opt_text && argc == 2) - fail ("When specifying --text, no file should be given"); - - g_printerr ("Usage: %s [options] FILE\n", prog_name); - exit (1); - } - - if (!opt_output) - opt_display = TRUE; - - /* Get the text - */ - if (opt_text) - { - text = g_strdup (opt_text); - len = strlen (text); - } - else - { - if (!g_file_get_contents (argv[1], &text, &len, &error)) - fail ("%s\n", error->message); - if (!g_utf8_validate (text, len, NULL)) - fail ("Text is not valid UTF-8"); - } - - /* Strip trailing whitespace - */ - p = text + len; - while (p > text) - { - gunichar ch; - p = g_utf8_prev_char (p); - ch = g_utf8_get_char (p); - if (!g_unichar_isspace (ch)) - break; - else - *p = '\0'; - } - - /* Make sure we have valid markup - */ - if (opt_markup && - !pango_parse_markup (text, -1, 0, NULL, NULL, NULL, &error)) - fail ("Cannot parse input as markup: %s", error->message); - - /* Setup PANGO_RC_FILE - */ - if (!opt_pangorc) - if (g_file_test ("./pangorc", G_FILE_TEST_IS_REGULAR)) - opt_pangorc = "./pangorc"; - if (opt_pangorc) - g_setenv ("PANGO_RC_FILE", opt_pangorc, TRUE); -} - -void -finalize (void) -{ - g_free (text); -} |