/* A font for use with Cairo. */
struct xr_font
{
- char *string;
PangoFontDescription *desc;
PangoLayout *layout;
- PangoFontMetrics *metrics;
};
/* An output item whose rendering is in progress. */
struct output_driver driver;
/* User parameters. */
- bool headers; /* Draw headers at top of page? */
-
struct xr_font fonts[XR_N_FONTS];
- int font_height; /* In XR units. */
int width; /* Page width minus margins. */
int length; /* Page length minus margins and header. */
/* Internal state. */
struct render_params *params;
+ int char_width, char_height;
char *command_name;
char *title;
char *subtitle;
static const struct output_driver_class cairo_driver_class;
-static void draw_headers (struct xr_driver *);
static void xr_driver_destroy_fsm (struct xr_driver *);
static void xr_driver_run_fsm (struct xr_driver *);
-static bool load_font (struct xr_driver *, struct xr_font *);
-static void free_font (struct xr_font *);
-
static void xr_draw_line (void *, int bb[TABLE_N_AXES][2],
enum render_line_style styles[TABLE_N_AXES][2]);
static void xr_measure_cell_width (void *, const struct table_cell *,
return driver_option_get (d, options, key, default_value);
}
+static PangoFontDescription *
+parse_font (struct output_driver *d, struct string_map *options,
+ const char *key, const char *default_value,
+ int default_points)
+{
+ PangoFontDescription *desc;
+ char *string;
+
+ /* Parse KEY as a font description. */
+ string = parse_string (opt (d, options, key, default_value));
+ desc = pango_font_description_from_string (string);
+ if (desc == NULL)
+ {
+ error (0, 0, _("`%s': bad font specification"), string);
+
+ /* Fall back to DEFAULT_VALUE, which had better be a valid font
+ description. */
+ desc = pango_font_description_from_string (default_value);
+ assert (desc != NULL);
+ }
+ free (string);
+
+ /* If the font description didn't include an explicit font size, then set it
+ to DEFAULT_POINTS. */
+ if (!(pango_font_description_get_set_fields (desc) & PANGO_FONT_MASK_SIZE))
+ pango_font_description_set_size (desc,
+ default_points / 1000.0 * PANGO_SCALE);
+
+ return desc;
+}
+
static struct xr_driver *
xr_allocate (const char *name, int device_type, struct string_map *o)
{
int paper_width, paper_length;
struct output_driver *d;
struct xr_driver *xr;
+ int font_points;
xr = xzalloc (sizeof *xr);
d = &xr->driver;
output_driver_init (d, &cairo_driver_class, name, device_type);
- xr->font_height = XR_POINT * 10;
- xr->fonts[XR_FONT_FIXED].string
- = parse_string (opt (d, o, "fixed-font", "monospace"));
- xr->fonts[XR_FONT_PROPORTIONAL].string
- = parse_string (opt (d, o, "prop-font", "serif"));
- xr->fonts[XR_FONT_EMPHASIS].string
- = parse_string (opt (d, o, "emph-font", "serif italic"));
+
+ font_points = parse_int (opt (d, o, "font-size", "10000"),
+ 1000, 1000000);
+ xr->fonts[XR_FONT_FIXED].desc = parse_font (d, o, "fixed-font", "monospace",
+ font_points);
+ xr->fonts[XR_FONT_PROPORTIONAL].desc = parse_font (d, o, "prop-font",
+ "serif", font_points);
+ xr->fonts[XR_FONT_EMPHASIS].desc = parse_font (d, o, "emph-font",
+ "serif italic", font_points);
+
xr->line_gutter = XR_POINT;
xr->line_space = XR_POINT;
xr->line_width = XR_POINT / 2;
xr->page_number = 0;
- xr->headers = parse_boolean (opt (d, o, "headers", "true"));
-
parse_paper_size (opt (d, o, "paper-size", ""), &paper_width, &paper_length);
xr->left_margin = parse_dimension (opt (d, o, "left-margin", ".5in"));
xr->right_margin = parse_dimension (opt (d, o, "right-margin", ".5in"));
xr->top_margin = parse_dimension (opt (d, o, "top-margin", ".5in"));
xr->bottom_margin = parse_dimension (opt (d, o, "bottom-margin", ".5in"));
- if (xr->headers)
- xr->top_margin += 3 * xr->font_height;
xr->width = paper_width - xr->left_margin - xr->right_margin;
xr->length = paper_length - xr->top_margin - xr->bottom_margin;
return xr;
}
+static bool
+xr_is_72dpi (cairo_t *cr)
+{
+ cairo_surface_type_t type;
+ cairo_surface_t *surface;
+
+ surface = cairo_get_target (cr);
+ type = cairo_surface_get_type (surface);
+ return type == CAIRO_SURFACE_TYPE_PDF || type == CAIRO_SURFACE_TYPE_PS;
+}
+
static bool
xr_set_cairo (struct xr_driver *xr, cairo_t *cairo)
{
+ PangoContext *context;
+ PangoFontMap *map;
int i;
xr->cairo = cairo;
cairo_set_line_width (xr->cairo, xr_to_pt (xr->line_width));
+ map = pango_cairo_font_map_get_default ();
+ context = pango_cairo_font_map_create_context (PANGO_CAIRO_FONT_MAP (map));
+ if (xr_is_72dpi (cairo))
+ {
+ /* Pango seems to always scale fonts according to the DPI specified
+ in the font map, even if the surface has a real DPI. The default
+ DPI is 96, so on a 72 DPI device fonts end up being 96/72 = 133%
+ of their desired size. We deal with this by fixing the resolution
+ here. Presumably there is a better solution, but what? */
+ pango_cairo_context_set_resolution (context, 72.0);
+ }
+
+ xr->char_width = 0;
+ xr->char_height = 0;
for (i = 0; i < XR_N_FONTS; i++)
- if (!load_font (xr, &xr->fonts[i]))
- return false;
+ {
+ struct xr_font *font = &xr->fonts[i];
+ int char_width, char_height;
+
+ font->layout = pango_layout_new (context);
+ pango_layout_set_font_description (font->layout, font->desc);
+
+ pango_layout_set_text (font->layout, "0", 1);
+ pango_layout_get_size (font->layout, &char_width, &char_height);
+ xr->char_width = MAX (xr->char_width, char_width);
+ xr->char_height = MAX (xr->char_height, char_height);
+ }
+
+ g_object_unref (G_OBJECT (context));
if (xr->params == NULL)
{
xr->params->aux = xr;
xr->params->size[H] = xr->width;
xr->params->size[V] = xr->length;
- xr->params->font_size[H] = xr->font_height / 2; /* XXX */
- xr->params->font_size[V] = xr->font_height;
+ xr->params->font_size[H] = xr->char_width;
+ xr->params->font_size[V] = xr->char_height;
single_width = 2 * xr->line_gutter + xr->line_width;
double_width = 2 * xr->line_gutter + xr->line_space + 2 * xr->line_width;
status = cairo_surface_status (surface);
if (status != CAIRO_STATUS_SUCCESS)
{
- error (0, 0, _("error opening output file \"%s\": %s"),
+ error (0, 0, _("error opening output file `%s': %s"),
file_name, cairo_status_to_string (status));
cairo_surface_destroy (surface);
goto error;
cairo_save (xr->cairo);
xr_driver_next_page (xr, xr->cairo);
- if (xr->width / (xr->font_height / 2) < MIN_WIDTH)
+ if (xr->width / xr->char_width < MIN_WIDTH)
{
error (0, 0, _("The defined page is not wide enough to hold at least %d "
"characters in the default font. In fact, there's only "
"room for %d characters."),
MIN_WIDTH,
- xr->width / (xr->font_height / 2));
+ xr->width / xr->char_width);
goto error;
}
- if (xr->length / xr->font_height < MIN_LENGTH)
+ if (xr->length / xr->char_height < MIN_LENGTH)
{
- error (0, 0, _("The defined page is not long "
- "enough to hold margins and headers, plus least %d "
- "lines of the default fonts. In fact, there's only "
+ error (0, 0, _("The defined page is not long enough to hold at least %d "
+ "lines in the default font. In fact, there's only "
"room for %d lines."),
MIN_LENGTH,
- xr->length / xr->font_height);
+ xr->length / xr->char_height);
goto error;
}
- draw_headers (xr);
-
return &xr->driver;
error:
free (xr->command_name);
for (i = 0; i < XR_N_FONTS; i++)
- free_font (&xr->fonts[i]);
+ {
+ struct xr_font *font = &xr->fonts[i];
+
+ if (font->desc != NULL)
+ pango_font_description_free (font->desc);
+ if (font->layout != NULL)
+ g_object_unref (font->layout);
+ }
+
free (xr->params);
free (xr);
}
}
\f
/* Functions for rendering a series of output items to a series of Cairo
- contexts, with pagination, possibly including headers.
+ contexts, with pagination.
Used by PSPPIRE for printing, and by the basic Cairo output driver above as
its underlying implementation.
xr->page_number++;
xr->cairo = cairo;
xr->y = 0;
- draw_headers (xr);
xr_driver_run_fsm (xr);
}
return xr->fsm != NULL;
}
-/* Returns true if the current page doesn't have any content yet (besides
- headers, if enabled). */
+/* Returns true if the current page doesn't have any content yet. */
bool
xr_driver_is_page_blank (const struct xr_driver *xr)
{
xr_layout_cell (xr, cell, bb, clip, PANGO_WRAP_WORD, &w, &h);
}
\f
-/* Writes STRING at location (X,Y) trimmed to the given MAX_WIDTH
- and with the given cell OPTIONS for XR. */
-static int
-draw_text (struct xr_driver *xr, const char *string, int x, int y,
- int max_width, unsigned int options)
-{
- struct table_cell cell;
- int bb[TABLE_N_AXES][2];
- int w, h;
-
- cell.contents = string;
- cell.options = options;
- bb[H][0] = x;
- bb[V][0] = y - xr->y;
- bb[H][1] = x + max_width;
- bb[V][1] = xr->font_height - xr->y;
- xr_layout_cell (xr, &cell, bb, bb, PANGO_WRAP_WORD_CHAR, &w, &h);
- return w;
-}
-
-/* Writes LEFT left-justified and RIGHT right-justified within
- (X0...X1) at Y. LEFT or RIGHT or both may be null. */
-static void
-draw_header_line (struct xr_driver *xr, const char *left, const char *right,
- int x0, int x1, int y)
-{
- int right_width = 0;
- if (right != NULL)
- right_width = (draw_text (xr, right, x0, y, x1 - x0, TAB_RIGHT)
- + xr->font_height / 2);
- if (left != NULL)
- draw_text (xr, left, x0, y, x1 - x0 - right_width, TAB_LEFT);
-}
-
-/* Draw top of page headers for XR. */
-static void
-draw_headers (struct xr_driver *xr)
-{
- char *r1, *r2;
- int x0, x1;
- int y;
-
- if (!xr->headers || xr->cairo == NULL)
- return;
-
- y = -3 * xr->font_height;
- x0 = xr->font_height / 2;
- x1 = xr->width - xr->font_height / 2;
-
- /* Draw box. */
- cairo_rectangle (xr->cairo, 0, xr_to_pt (y), xr_to_pt (xr->width),
- xr_to_pt (2 * (xr->font_height
- + xr->line_width + xr->line_gutter)));
- cairo_save (xr->cairo);
- cairo_set_source_rgb (xr->cairo, 0.9, 0.9, 0.9);
- cairo_fill_preserve (xr->cairo);
- cairo_restore (xr->cairo);
- cairo_stroke (xr->cairo);
-
- y += xr->line_width + xr->line_gutter;
-
- r1 = xasprintf (_("%s - Page %d"), get_start_date (), xr->page_number);
- r2 = xasprintf ("%s - %s", version, host_system);
-
- draw_header_line (xr, xr->title, r1, x0, x1, y);
- y += xr->font_height;
-
- draw_header_line (xr, xr->subtitle, r2, x0, x1, y);
-
- free (r1);
- free (r2);
-}
-\f
static void
xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell,
int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
}
}
\f
-/* Attempts to load FONT, initializing its other members based on
- its 'string' member and the information in DRIVER. Returns true
- if successful, otherwise false. */
-static bool
-load_font (struct xr_driver *xr, struct xr_font *font)
-{
- PangoContext *context;
- PangoLanguage *language;
-
- font->desc = pango_font_description_from_string (font->string);
- if (font->desc == NULL)
- {
- error (0, 0, _("\"%s\": bad font specification"), font->string);
- return false;
- }
- pango_font_description_set_absolute_size (font->desc, xr->font_height);
-
- font->layout = pango_cairo_create_layout (xr->cairo);
- pango_layout_set_font_description (font->layout, font->desc);
-
- language = pango_language_get_default ();
- context = pango_layout_get_context (font->layout);
- font->metrics = pango_context_get_metrics (context, font->desc, language);
-
- return true;
-}
-
-/* Frees FONT. */
-static void
-free_font (struct xr_font *font)
-{
- free (font->string);
- if (font->desc != NULL)
- pango_font_description_free (font->desc);
- pango_font_metrics_unref (font->metrics);
- if (font->layout != NULL)
- g_object_unref (font->layout);
-}
-
struct output_driver_factory pdf_driver_factory = { "pdf", xr_pdf_create };
struct output_driver_factory ps_driver_factory = { "ps", xr_ps_create };
struct output_driver_factory svg_driver_factory = { "svg", xr_svg_create };
}
}
+/* Draws onto CR at least the region of R that is enclosed in (X,Y)-(X+W,Y+H),
+ and possibly some additional parts. */
void
-xr_rendering_draw (struct xr_rendering *r, cairo_t *cr)
+xr_rendering_draw (struct xr_rendering *r, cairo_t *cr,
+ int x, int y, int w, int h)
{
if (r->chart == NULL)
{
xr_set_cairo (xr, cr);
xr->y = 0;
- render_page_draw (r->page);
+ render_page_draw_region (r->page,
+ x * 1024, y * 1024, w * 1024, h * 1024);
}
else
xr_draw_chart (r->chart, cr, 0, 0, CHART_WIDTH, CHART_HEIGHT);
status = cairo_surface_write_to_png (surface, file_name);
if (status != CAIRO_STATUS_SUCCESS)
- error (0, 0, _("error writing output file \"%s\": %s"),
+ error (0, 0, _("error writing output file `%s': %s"),
file_name, cairo_status_to_string (status));
cairo_destroy (cr);
ts->table_item = table_item_ref (table_item);
if (xr->y > 0)
- xr->y += xr->font_height;
+ xr->y += xr->char_height;
page = xr_render_table_item (xr, table_item, &ts->caption_height);
xr->params->size[V] = xr->length - ts->caption_height;
case TEXT_ITEM_TITLE:
free (xr->title);
xr->title = xstrdup (text);
- draw_headers (xr);
break;
case TEXT_ITEM_SUBTITLE:
free (xr->subtitle);
xr->subtitle = xstrdup (text);
- draw_headers (xr);
break;
case TEXT_ITEM_COMMAND_CLOSE:
case TEXT_ITEM_BLANK_LINE:
if (xr->y > 0)
- xr->y += xr->font_height;
+ xr->y += xr->char_height;
break;
case TEXT_ITEM_EJECT_PAGE:
projects / pspp / blobdiff