diff options
Diffstat (limited to 'examples/pangoft2topgm.c')
-rw-r--r-- | examples/pangoft2topgm.c | 378 |
1 files changed, 12 insertions, 366 deletions
diff --git a/examples/pangoft2topgm.c b/examples/pangoft2topgm.c index 106f9c8a..52370383 100644 --- a/examples/pangoft2topgm.c +++ b/examples/pangoft2topgm.c @@ -21,388 +21,38 @@ * Boston, MA 02111-1307, USA. */ -#define BUFSIZE 1024 -#define MALLOCSIZE 1024 -#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 "renderdemo.h" -#include <pango/pango.h> #include <pango/pangoft2.h> -#define _MAKE_FONT_NAME(family, size) family " " #size -#define MAKE_FONT_NAME(family, size) _MAKE_FONT_NAME(family, size) - -static char *prog_name; -static PangoContext *context; - static char *tmpfile_name; -static char *outfile_name; - -static gboolean opt_display = FALSE; -static int opt_dpi = 96; -static char *opt_font = MAKE_FONT_NAME (DEFAULT_FONT_FAMILY, DEFAULT_FONT_SIZE); -static gboolean opt_header = FALSE; -static char *opt_output = NULL; -static int opt_margin = 10; -static int opt_markup = FALSE; -static gboolean opt_rtl = FALSE; -static int opt_rotate = 0; -static gboolean opt_auto_dir = TRUE; -static char *opt_text = NULL; -static gboolean opt_waterfall = FALSE; -static int opt_width = -1; -static int opt_indent = 0; - -static void fail (const char *format, ...) G_GNUC_PRINTF (1, 2); - -static 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); - - if (outfile_name && !opt_output) - remove (outfile_name); - - exit (1); -} - -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); - - 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_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; -} - -static 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, - FT_Bitmap *bitmap, - PangoMatrix *matrix, - 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) - { - pango_context_set_matrix (context, matrix); - - 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 (bitmap) - pango_ft2_render_layout (bitmap, layout, 0, dy); - - dy += PANGO_PIXELS (logical_rect.height); - - g_object_unref (layout); - } -} - -static void -do_output (PangoContext *context, - const char *text, - FT_Bitmap *bitmap, - int *width, - int *height) -{ - 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; - - *width = 0; - *height = 0; - - 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 (bitmap) - pango_ft2_render_layout (bitmap, layout, x, y); - - y += PANGO_PIXELS (logical_rect.height); - - g_object_unref (layout); - g_free (options_string); - } - - output_body (context, text, NULL, NULL, &rotated_width, &rotated_height); - - pango_matrix_rotate (&matrix, opt_rotate); - - 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; - - if (bitmap) - output_body (context, text, bitmap, &matrix, &rotated_width, &rotated_height); - - *width = MAX (*width, maxx - minx); - *height += maxy - miny; - - *width += 2 * opt_margin; - *height += 2 * opt_margin; -} static void -show_help (ArgContext *context, - const char *name, - const char *arg, - gpointer data) +ft2_render (PangoLayout *layout, + int x, + int y, + gpointer data) { - g_print ("%s - An example viewer for the pango ft2 extension\n" - "\n" - "Syntax:\n" - " %s [options] FILE\n" - "\n" - "Options:\n", - prog_name, prog_name); - arg_context_print_help (context); - exit (0); + pango_ft2_render_layout (data, layout, x, y); } -int main(int argc, char *argv[]) +int +main(int argc, char *argv[]) { + PangoContext *context; FILE *outfile; - char *text; - size_t len; - char *p; PangoFontMap *fontmap; GError *error = NULL; - ArgContext *arg_context; gboolean do_convert = FALSE; - - static const ArgDesc args[] = { - { "no-auto-dir","Don't set layout direction according to contents", - ARG_NOBOOL, &opt_auto_dir }, - { "display", "Show output using ImageMagick", - ARG_BOOL, &opt_display }, - { "dpi", "Set the dpi'", - ARG_INT, &opt_dpi }, - { "font", "Set the font name", - ARG_STRING, &opt_font }, - { "header", "Display the options in the output", - ARG_BOOL, &opt_header }, - { "help", "Show this output", - ARG_CALLBACK, NULL, show_help, }, - { "margin", "Set the margin on the output in pixels", - ARG_INT, &opt_margin }, - { "markup", "Interpret contents as Pango markup", - ARG_BOOL, &opt_markup }, - { "output", "Name of output file", - ARG_STRING, &opt_output }, - { "rtl", "Set base dir to RTL", - ARG_BOOL, &opt_rtl }, - { "rotate", "Angle at which to rotate results", - ARG_INT, &opt_rotate }, - { "text", "Text to display (instead of a file)", - ARG_STRING, &opt_text }, - { "waterfall", "Create a waterfall display", - ARG_BOOL, &opt_waterfall }, - { "width", "Width in points to which to wrap output", - ARG_INT, &opt_width }, - { "indent", "Width in points to indent paragraphs", - ARG_INT, &opt_indent }, - { NULL } - }; - prog_name = g_path_get_basename (argv[0]); - g_type_init(); - if (g_file_test ("./pangorc", G_FILE_TEST_EXISTS)) - putenv ("PANGO_RC_FILE=./pangorc"); - - 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); - - 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_display && !opt_output) - { - g_printerr ("%s: --output not specified, assuming --display\n", prog_name); - 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); + parse_options (argc, argv); if (opt_output) { @@ -434,10 +84,6 @@ int main(int argc, char *argv[]) pango_ft2_font_map_set_resolution (PANGO_FT2_FONT_MAP (fontmap), opt_dpi, opt_dpi); context = pango_ft2_font_map_create_context (PANGO_FT2_FONT_MAP (fontmap)); - 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); - /* Write contents as pgm file */ { FT_Bitmap bitmap; @@ -445,7 +91,7 @@ int main(int argc, char *argv[]) int row; int width, height; - do_output (context, text, NULL, &width, &height); + do_output (context, NULL, NULL, &width, &height); bitmap.width = width; bitmap.pitch = (bitmap.width + 3) & ~3; @@ -455,7 +101,7 @@ int main(int argc, char *argv[]) bitmap.pixel_mode = ft_pixel_mode_grays; memset (buf, 0x00, bitmap.pitch * bitmap.rows); - do_output (context, text, &bitmap, &width, &height); + do_output (context, ft2_render, &bitmap, &width, &height); /* Invert bitmap to get black text on white background */ { |