diff options
Diffstat (limited to 'examples/renderdemo.c')
| -rw-r--r-- | examples/renderdemo.c | 178 |
1 files changed, 99 insertions, 79 deletions
diff --git a/examples/renderdemo.c b/examples/renderdemo.c index a0d3a5ea..85f0ddb7 100644 --- a/examples/renderdemo.c +++ b/examples/renderdemo.c @@ -26,6 +26,7 @@ #include <stdio.h> #include <string.h> +#include <glib.h> #include <pango/pango.h> #include "renderdemo.h" @@ -58,6 +59,7 @@ HintMode opt_hinting = HINT_DEFAULT; PangoWrapMode opt_wrap = PANGO_WRAP_WORD_CHAR; gboolean opt_wrap_set = FALSE; const char *opt_pangorc = NULL; +const PangoViewer *opt_viewer = NULL; /* Text (or markup) to render */ static char *text; @@ -66,12 +68,12 @@ void fail (const char *format, ...) { const char *msg; - + va_list vap; va_start (vap, format); msg = g_strdup_vprintf (format, vap); - g_warning ("%s: %s\n", prog_name, msg); - + g_printerr ("%s: %s\n", prog_name, msg); + exit (1); } @@ -79,7 +81,7 @@ 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); @@ -110,7 +112,7 @@ make_layout(PangoContext *context, 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, opt_wrap); @@ -123,7 +125,7 @@ make_layout(PangoContext *context, 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); @@ -142,7 +144,7 @@ get_options_string (void) 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); + result = g_strdup_printf ("%s: %s (%d dpi)", opt_viewer->name, font_name, opt_dpi); pango_font_description_free (font_description); g_free (font_name); @@ -164,16 +166,15 @@ static void output_body (PangoContext *context, const char *text, RenderCallback render_cb, + gpointer cb_context, gpointer cb_data, int *width, - int *height, - gboolean show_borders) + int *height) { PangoLayout *layout; PangoRectangle logical_rect; int size, start_size, end_size, increment; - int dy; - + if (opt_waterfall) { start_size = 8; @@ -188,25 +189,17 @@ output_body (PangoContext *context, *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); - - /* TODO: instead of these two calls, we really should call - * pango_layout_get_effective_width when that's implemented. - */ - *width = MAX (*width, PANGO_PIXELS (pango_layout_get_width (layout))); - *width = MAX (*width, PANGO_PIXELS (logical_rect.width)); - - *height += PANGO_PIXELS (logical_rect.height); if (render_cb) - (*render_cb) (layout, 0, dy, cb_data, show_borders); - - dy += PANGO_PIXELS (logical_rect.height); + (*render_cb) (layout, 0, *height, cb_context, cb_data); + + *width = MAX (*width, PANGO_PIXELS (logical_rect.x + logical_rect.width)); + *height += PANGO_PIXELS (logical_rect.height); g_object_unref (layout); } @@ -215,11 +208,12 @@ output_body (PangoContext *context, static void set_transform (PangoContext *context, TransformCallback transform_cb, + gpointer cb_context, gpointer cb_data, PangoMatrix *matrix) { if (transform_cb) - (*transform_cb) (context, matrix, cb_data); + (*transform_cb) (context, matrix, cb_context, cb_data); else pango_context_set_matrix (context, matrix); } @@ -228,10 +222,10 @@ void do_output (PangoContext *context, RenderCallback render_cb, TransformCallback transform_cb, + gpointer cb_context, gpointer cb_data, int *width_out, - int *height_out, - gboolean show_borders) + int *height_out) { PangoLayout *layout; PangoRectangle logical_rect; @@ -246,40 +240,40 @@ do_output (PangoContext *context, double minx, miny; double maxx, maxy; int width, height; - + width = 0; height = 0; - set_transform (context, transform_cb, cb_data, NULL); - + set_transform (context, transform_cb, cb_context, 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, show_borders); - + (*render_cb) (layout, x, y, cb_context, 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, show_borders); - + set_transform (context, transform_cb, cb_context, cb_data, &matrix); + + output_body (context, text, NULL, 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); @@ -294,10 +288,10 @@ do_output (PangoContext *context, matrix.x0 = x - minx; matrix.y0 = y - miny; - set_transform (context, transform_cb, cb_data, &matrix); - + set_transform (context, transform_cb, cb_context, cb_data, &matrix); + if (render_cb) - output_body (context, text, render_cb, cb_data, &rotated_width, &rotated_height, show_borders); + output_body (context, text, render_cb, cb_context, cb_data, &rotated_width, &rotated_height); width = MAX (width, maxx - minx); height += maxy - miny; @@ -312,23 +306,6 @@ do_output (PangoContext *context, } -/* 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 gboolean parse_ellipsis (const char *name, const char *arg, @@ -341,7 +318,7 @@ parse_ellipsis (const char *name, if (!class) class = g_type_class_ref (PANGO_TYPE_ELLIPSIZE_MODE); - + value = g_enum_get_value_by_nick (class, arg); if (value) opt_ellipsize = value->value; @@ -362,7 +339,7 @@ parse_hinting (const char *name, { static GEnumClass *class = NULL; gboolean ret = TRUE; - + if (!class) class = g_type_class_ref (PANGO_TYPE_ELLIPSIZE_MODE); @@ -381,7 +358,6 @@ parse_hinting (const char *name, return ret; } - static gboolean parse_wrap (const char *name, const char *arg, @@ -391,7 +367,7 @@ parse_wrap (const char *name, static GEnumClass *class = NULL; gboolean ret = TRUE; GEnumValue *value; - + if (!class) class = g_type_class_ref (PANGO_TYPE_WRAP_MODE); @@ -410,48 +386,84 @@ parse_wrap (const char *name, return ret; } +static gboolean +parse_backend (const char *name, + const char *arg, + gpointer data, + GError **error) +{ + gboolean ret = TRUE; + const PangoViewer **viewer; + + for (viewer = viewers; *viewer; viewer++) + if (!g_ascii_strcasecmp ((*viewer)->id, arg)) + break; + + if (*viewer) + opt_viewer = *viewer; + else + { + GString *backends = g_string_new (NULL); + + for (viewer = viewers; *viewer; viewer++) + if ((*viewer)->id) + { + g_string_append (backends, (*viewer)->id); + g_string_append_c (backends, '/'); + } + g_string_truncate (backends, MAX (0, (gint)backends->len - 1)); + + fail ("available --backend options are: %s", g_string_free (backends, FALSE)); + ret = FALSE; + } + + return ret; +} + void parse_options (int argc, char *argv[]) { - GOptionEntry entries[] = + GOptionEntry entries[] = { {"no-auto-dir", 0, G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE, &opt_auto_dir, "No layout direction according to contents", NULL}, + {"backend", 0, 0, G_OPTION_ARG_CALLBACK, &parse_backend, + "Pango backend to use for rendering", "id"}, {"no-display", 'q', G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE, &opt_display, "Do not display (just save to file or whatever)", NULL}, {"dpi", 0, 0, G_OPTION_ARG_INT, &opt_dpi, - "Set the resolution", NULL}, + "Set the resolution", "number"}, {"ellipsize", 0, 0, G_OPTION_ARG_CALLBACK, &parse_ellipsis, - "Ellipsization mode", "start/middle/end" }, + "Ellipsization mode", "start/middle/end"}, {"font", 0, 0, G_OPTION_ARG_STRING, &opt_font, - "Set the font description", NULL}, + "Set the font description", "description"}, {"header", 0, 0, G_OPTION_ARG_NONE, &opt_header, "Display the options in the output", NULL}, {"hinting", 0, 0, G_OPTION_ARG_CALLBACK, &parse_hinting, - "Hinting style", "none/auto/full" }, + "Hinting style", "none/auto/full"}, {"indent", 0, 0, G_OPTION_ARG_INT, &opt_indent, - "Width in points to indent paragraphs", NULL}, + "Width in points to indent paragraphs", "points"}, {"margin", 0, 0, G_OPTION_ARG_INT, &opt_margin, - "Set the margin on the output in pixels", NULL}, + "Set the margin on the output in pixels", "pixels"}, {"markup", 0, 0, G_OPTION_ARG_NONE, &opt_markup, "Interpret text as Pango markup", NULL}, - {"output", 'o', 0,G_OPTION_ARG_STRING, &opt_output, - "Save rendered image to output file", NULL}, + {"output", 'o', 0, G_OPTION_ARG_STRING, &opt_output, + "Save rendered image to output file", "file"}, {"pangorc", 0, 0, G_OPTION_ARG_STRING, &opt_pangorc, - "pangorc file to use (default is ./pangorc)", NULL}, + "pangorc file to use (default is ./pangorc)", "file"}, {"rtl", 0, 0, G_OPTION_ARG_NONE, &opt_rtl, "Set base direction to right-to-left", NULL}, {"rotate", 0, 0, G_OPTION_ARG_INT, &opt_rotate, - "Angle at which to rotate results", NULL}, + "Angle at which to rotate results", "degrees"}, {"runs", 'n', 0, G_OPTION_ARG_INT, &opt_runs, - "Run Pango layout engine this many times", NULL}, + "Run Pango layout engine this many times", "integer"}, {"text", 't', 0, G_OPTION_ARG_STRING, &opt_text, - "Text to display (instead of a file)", NULL}, + "Text to display (instead of a file)", "string"}, {"waterfall", 0, 0, G_OPTION_ARG_NONE, &opt_waterfall, "Create a waterfall display", NULL}, {"width", 'w', 0, G_OPTION_ARG_INT, &opt_width, - "Width in points to which to wrap output", NULL}, + "Width in points to which to wrap output", "points"}, {"wrap", 0, 0, G_OPTION_ARG_CALLBACK, &parse_wrap, "Text wrapping mode (needs a width to be set), ", "word/char/word-char"}, {NULL} @@ -488,6 +500,14 @@ parse_options (int argc, char *argv[]) exit (1); } + /* set up the backend */ + if (!opt_viewer) + { + opt_viewer = *viewers; + if (!opt_viewer) + fail ("No viewer backend found"); + } + /* if wrap mode is set then width must be set */ if (opt_width < 0 && opt_wrap_set) { @@ -508,7 +528,7 @@ parse_options (int argc, char *argv[]) if (!g_utf8_validate (text, len, NULL)) fail ("Text is not valid UTF-8"); } - + /* Strip trailing whitespace */ p = text + len; |