X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Foutput%2Fcairo.c;h=5a310c610c8ec2f53b6c2ccaf704fee119e8063e;hb=173d1687aea88e0e5e1b1d8615ed68ebefb15d08;hp=6eb39b276b7ca263a3170e692273f0ca70d81002;hpb=dde5a3c946871b4aab3d6b436438dd8df11db261;p=pspp diff --git a/src/output/cairo.c b/src/output/cairo.c index 6eb39b276b..5a310c610c 100644 --- a/src/output/cairo.c +++ b/src/output/cairo.c @@ -16,31 +16,31 @@ #include -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include +#include "output/cairo.h" + +#include "libpspp/assertion.h" +#include "libpspp/cast.h" +#include "libpspp/message.h" +#include "libpspp/start-date.h" +#include "libpspp/str.h" +#include "libpspp/string-map.h" +#include "libpspp/version.h" +#include "output/cairo-chart.h" +#include "output/chart-item-provider.h" +#include "output/charts/boxplot.h" +#include "output/charts/np-plot.h" +#include "output/charts/piechart.h" +#include "output/charts/plot-hist.h" +#include "output/charts/roc-chart.h" +#include "output/charts/scree.h" +#include "output/driver-provider.h" +#include "output/message-item.h" +#include "output/options.h" +#include "output/render.h" +#include "output/tab.h" +#include "output/table-item.h" +#include "output/table.h" +#include "output/text-item.h" #include #include @@ -52,10 +52,10 @@ #include #include -#include "error.h" -#include "intprops.h" -#include "minmax.h" -#include "xalloc.h" +#include "gl/error.h" +#include "gl/intprops.h" +#include "gl/minmax.h" +#include "gl/xalloc.h" #include "gettext.h" #define _(msgid) gettext (msgid) @@ -95,10 +95,20 @@ enum xr_font_type /* 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 xr_render_fsm + { + /* Renders as much of itself as it can on the current page. Returns true + if rendering is complete, false if the output item needs another + page. */ + bool (*render) (struct xr_render_fsm *, struct xr_driver *); + + /* Destroys the output item. */ + void (*destroy) (struct xr_render_fsm *); }; /* Cairo output driver. */ @@ -107,10 +117,7 @@ struct xr_driver 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. */ @@ -124,25 +131,22 @@ struct xr_driver int line_space; /* Space between lines. */ int line_width; /* Width of lines. */ - enum xr_output_type file_type; /* Type of output file. */ - /* Internal state. */ struct render_params *params; + int char_width, char_height; char *command_name; char *title; char *subtitle; cairo_t *cairo; int page_number; /* Current page number. */ int y; + struct xr_render_fsm *fsm; }; static const struct output_driver_class cairo_driver_class; -static void xr_show_page (struct xr_driver *); -static void draw_headers (struct xr_driver *); - -static bool load_font (struct xr_driver *, struct xr_font *); -static void free_font (struct xr_font *); +static void xr_driver_destroy_fsm (struct xr_driver *); +static void xr_driver_run_fsm (struct xr_driver *); static void xr_draw_line (void *, int bb[TABLE_N_AXES][2], enum render_line_style styles[TABLE_N_AXES][2]); @@ -153,8 +157,11 @@ static int xr_measure_cell_height (void *, const struct table_cell *, static void xr_draw_cell (void *, const struct table_cell *, int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2]); + +static struct xr_render_fsm *xr_render_output_item ( + struct xr_driver *, const struct output_item *); -/* Driver initialization. */ +/* Output driver basics. */ static struct xr_driver * xr_driver_cast (struct output_driver *driver) @@ -170,43 +177,126 @@ opt (struct output_driver *d, struct string_map *options, const char *key, 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->headers = true; - 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 = 1; + xr->page_number = 0; + + 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")); + + 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) { @@ -220,8 +310,8 @@ xr_set_cairo (struct xr_driver *xr, cairo_t *cairo) 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; @@ -246,33 +336,17 @@ xr_create (const char *file_name, enum settings_output_devices device_type, cairo_surface_t *surface; cairo_status_t status; double width_pt, length_pt; - int paper_width, paper_length; xr = xr_allocate (file_name, device_type, o); d = &xr->driver; - xr->headers = parse_boolean (opt (d, o, "headers", "true")); - - xr->file_type = file_type; - - 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; - - width_pt = paper_width / 1000.0; - length_pt = paper_length / 1000.0; - if (xr->file_type == XR_PDF) + width_pt = (xr->width + xr->left_margin + xr->right_margin) / 1000.0; + length_pt = (xr->length + xr->top_margin + xr->bottom_margin) / 1000.0; + if (file_type == XR_PDF) surface = cairo_pdf_surface_create (file_name, width_pt, length_pt); - else if (xr->file_type == XR_PS) + else if (file_type == XR_PS) surface = cairo_ps_surface_create (file_name, width_pt, length_pt); - else if (xr->file_type == XR_SVG) + else if (file_type == XR_SVG) surface = cairo_svg_surface_create (file_name, width_pt, length_pt); else NOT_REACHED (); @@ -280,7 +354,7 @@ xr_create (const char *file_name, enum settings_output_devices device_type, 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; @@ -289,31 +363,29 @@ xr_create (const char *file_name, enum settings_output_devices device_type, xr->cairo = cairo_create (surface); cairo_surface_destroy (surface); - cairo_translate (xr->cairo, - xr_to_pt (xr->left_margin), - xr_to_pt (xr->top_margin)); - if (!xr_set_cairo (xr, xr->cairo)) goto error; - if (xr->width / (xr->font_height / 2) < MIN_WIDTH) + cairo_save (xr->cairo); + xr_driver_next_page (xr, xr->cairo); + + 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; } @@ -351,13 +423,12 @@ xr_destroy (struct output_driver *driver) struct xr_driver *xr = xr_driver_cast (driver); size_t i; + xr_driver_destroy_fsm (xr); + if (xr->cairo != NULL) { cairo_status_t status; - if (xr->y > 0) - xr_show_page (xr); - cairo_surface_finish (cairo_get_target (xr->cairo)); status = cairo_status (xr->cairo); if (status != CAIRO_STATUS_SUCCESS) @@ -369,7 +440,15 @@ xr_destroy (struct output_driver *driver) 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); } @@ -410,147 +489,88 @@ xr_render_table_item (struct xr_driver *xr, const struct table_item *item, } static void -xr_output_table_item (struct xr_driver *xr, - const struct table_item *table_item) +xr_submit (struct output_driver *driver, const struct output_item *output_item) { - struct render_break x_break; - struct render_page *page; - int caption_height; - - if (xr->y > 0) - xr->y += xr->font_height; + struct xr_driver *xr = xr_driver_cast (driver); - page = xr_render_table_item (xr, table_item, &caption_height); - xr->params->size[V] = xr->length - caption_height; - for (render_break_init (&x_break, page, H); - render_break_has_next (&x_break); ) + xr_driver_output_item (xr, output_item); + while (xr_driver_need_new_page (xr)) { - struct render_page *x_slice; - struct render_break y_break; + cairo_restore (xr->cairo); + cairo_show_page (xr->cairo); + cairo_save (xr->cairo); + xr_driver_next_page (xr, xr->cairo); + } +} + +/* Functions for rendering a series of output items to a series of Cairo + contexts, with pagination. - x_slice = render_break_next (&x_break, xr->width); - for (render_break_init (&y_break, x_slice, V); - render_break_has_next (&y_break); ) - { - int space = xr->length - xr->y; - struct render_page *y_slice; + Used by PSPPIRE for printing, and by the basic Cairo output driver above as + its underlying implementation. - /* XXX doesn't allow for caption or space between segments */ - if (render_break_next_size (&y_break) > space) - { - assert (xr->y > 0); - xr_show_page (xr); - continue; - } + See the big comment in cairo.h for intended usage. */ - y_slice = render_break_next (&y_break, space); - if (caption_height) - { - struct table_cell cell; - int bb[TABLE_N_AXES][2]; +/* Gives new page CAIRO to XR for output. CAIRO may be null to skip actually + rendering the page (which might be useful to find out how many pages an + output document has without actually rendering it). */ +void +xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo) +{ + if (cairo != NULL) + cairo_translate (cairo, + xr_to_pt (xr->left_margin), + xr_to_pt (xr->top_margin)); - xr_init_caption_cell (table_item_get_caption (table_item), - &cell); - bb[H][0] = 0; - bb[H][1] = xr->width; - bb[V][0] = 0; - bb[V][1] = caption_height; - xr_draw_cell (xr, &cell, bb, bb); - xr->y += caption_height; - caption_height = 0; - } + xr->page_number++; + xr->cairo = cairo; + xr->y = 0; + xr_driver_run_fsm (xr); +} - render_page_draw (y_slice); - xr->y += render_page_get_size (y_slice, V); - render_page_unref (y_slice); - } - render_break_destroy (&y_break); - } - render_break_destroy (&x_break); +/* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of + rendering a previous output item, that is, only if xr_driver_need_new_page() + returns false. */ +void +xr_driver_output_item (struct xr_driver *xr, + const struct output_item *output_item) +{ + assert (xr->fsm == NULL); + xr->fsm = xr_render_output_item (xr, output_item); + xr_driver_run_fsm (xr); } -static void -xr_output_text (struct xr_driver *xr, const char *text) +/* Returns true if XR is in the middle of rendering an output item and needs a + new page to be appended using xr_driver_next_page() to make progress, + otherwise false. */ +bool +xr_driver_need_new_page (const struct xr_driver *xr) { - struct table_item *table_item; + return xr->fsm != NULL; +} - table_item = table_item_create (table_from_string (TAB_LEFT, text), NULL); - xr_output_table_item (xr, table_item); - table_item_unref (table_item); +/* Returns true if the current page doesn't have any content yet. */ +bool +xr_driver_is_page_blank (const struct xr_driver *xr) +{ + return xr->y == 0; } static void -xr_submit (struct output_driver *driver, const struct output_item *output_item) +xr_driver_destroy_fsm (struct xr_driver *xr) { - struct xr_driver *xr = xr_driver_cast (driver); - if (is_table_item (output_item)) - xr_output_table_item (xr, to_table_item (output_item)); - else if (is_chart_item (output_item)) + if (xr->fsm != NULL) { - if (xr->y > 0) - xr_show_page (xr); - xr_draw_chart (to_chart_item (output_item), xr->cairo, 0.0, 0.0, - xr_to_pt (xr->width), xr_to_pt (xr->length)); - xr_show_page (xr); - } - else if (is_text_item (output_item)) - { - const struct text_item *text_item = to_text_item (output_item); - enum text_item_type type = text_item_get_type (text_item); - const char *text = text_item_get_text (text_item); - - switch (type) - { - case TEXT_ITEM_TITLE: - free (xr->title); - xr->title = xstrdup (text); - break; - - case TEXT_ITEM_SUBTITLE: - free (xr->subtitle); - xr->subtitle = xstrdup (text); - break; - - case TEXT_ITEM_COMMAND_CLOSE: - break; - - case TEXT_ITEM_BLANK_LINE: - if (xr->y > 0) - xr->y += xr->font_height; - break; - - case TEXT_ITEM_EJECT_PAGE: - if (xr->y > 0) - xr_show_page (xr); - break; - - default: - xr_output_text (xr, text); - break; - } - } - else if (is_message_item (output_item)) - { - const struct message_item *message_item = to_message_item (output_item); - const struct msg *msg = message_item_get_msg (message_item); - char *s = msg_to_string (msg, xr->command_name); - xr_output_text (xr, s); - free (s); + xr->fsm->destroy (xr->fsm); + xr->fsm = NULL; } } static void -xr_show_page (struct xr_driver *xr) +xr_driver_run_fsm (struct xr_driver *xr) { - if (xr->headers) - { - xr->y = 0; - draw_headers (xr); - } - cairo_show_page (xr->cairo); - - xr->page_number++; - xr->y = 0; + if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr)) + xr_driver_destroy_fsm (xr); } static void @@ -765,76 +785,6 @@ xr_draw_cell (void *xr_, const struct table_cell *cell, xr_layout_cell (xr, cell, bb, clip, PANGO_WRAP_WORD, &w, &h); } -/* 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; - bb[H][1] = x + max_width; - bb[V][1] = xr->font_height; - 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; - - 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); -} - 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], @@ -891,45 +841,6 @@ xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell, } } -/* 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 }; @@ -959,17 +870,9 @@ struct xr_rendering #define CHART_HEIGHT 375 struct xr_driver * -xr_create_driver (cairo_t *cairo) +xr_driver_create (cairo_t *cairo, struct string_map *options) { - struct xr_driver *xr; - struct string_map map; - - string_map_init (&map); - xr = xr_allocate ("cairo", 0, &map); - string_map_destroy (&map); - - xr->width = INT_MAX / 8; - xr->length = INT_MAX / 8; + struct xr_driver *xr = xr_allocate ("cairo", 0, options); if (!xr_set_cairo (xr, cairo)) { output_driver_destroy (&xr->driver); @@ -978,6 +881,18 @@ xr_create_driver (cairo_t *cairo) return xr; } +/* Destroy XR, which should have been created with xr_driver_create(). Any + cairo_t added to XR is not destroyed, because it is owned by the client. */ +void +xr_driver_destroy (struct xr_driver *xr) +{ + if (xr != NULL) + { + xr->cairo = NULL; + output_driver_destroy (&xr->driver); + } +} + static struct xr_rendering * xr_rendering_create_text (struct xr_driver *xr, const char *text, cairo_t *cr) { @@ -1040,8 +955,11 @@ xr_rendering_measure (struct xr_rendering *r, int *w, int *h) } } +/* 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) { @@ -1049,7 +967,8 @@ xr_rendering_draw (struct xr_rendering *r, cairo_t *cr) 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); @@ -1119,7 +1038,7 @@ xr_draw_png_chart (const struct chart_item *item, 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); @@ -1127,3 +1046,252 @@ xr_draw_png_chart (const struct chart_item *item, return file_name; } + +struct xr_table_state + { + struct xr_render_fsm fsm; + struct table_item *table_item; + struct render_break x_break; + struct render_break y_break; + int caption_height; + }; + +static bool +xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr) +{ + struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm); + + for (;;) + { + struct render_page *y_slice; + int space; + + while (!render_break_has_next (&ts->y_break)) + { + struct render_page *x_slice; + + render_break_destroy (&ts->y_break); + if (!render_break_has_next (&ts->x_break)) + return false; + + x_slice = render_break_next (&ts->x_break, xr->width); + render_break_init (&ts->y_break, x_slice, V); + } + + space = xr->length - xr->y; + if (render_break_next_size (&ts->y_break) > space) + { + assert (xr->y > 0); + return true; + } + + y_slice = render_break_next (&ts->y_break, space); + if (ts->caption_height) + { + if (xr->cairo) + { + struct table_cell cell; + int bb[TABLE_N_AXES][2]; + + xr_init_caption_cell (table_item_get_caption (ts->table_item), + &cell); + bb[H][0] = 0; + bb[H][1] = xr->width; + bb[V][0] = 0; + bb[V][1] = ts->caption_height; + xr_draw_cell (xr, &cell, bb, bb); + } + xr->y += ts->caption_height; + ts->caption_height = 0; + } + + if (xr->cairo) + render_page_draw (y_slice); + xr->y += render_page_get_size (y_slice, V); + render_page_unref (y_slice); + } +} + +static void +xr_table_destroy (struct xr_render_fsm *fsm) +{ + struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm); + + table_item_unref (ts->table_item); + render_break_destroy (&ts->x_break); + render_break_destroy (&ts->y_break); + free (ts); +} + +static struct xr_render_fsm * +xr_render_table (struct xr_driver *xr, const struct table_item *table_item) +{ + struct xr_table_state *ts; + struct render_page *page; + + ts = xmalloc (sizeof *ts); + ts->fsm.render = xr_table_render; + ts->fsm.destroy = xr_table_destroy; + ts->table_item = table_item_ref (table_item); + + if (xr->y > 0) + 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; + + render_break_init (&ts->x_break, page, H); + render_break_init_empty (&ts->y_break); + + return &ts->fsm; +} + +struct xr_chart_state + { + struct xr_render_fsm fsm; + struct chart_item *chart_item; + }; + +static bool +xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr) +{ + struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm); + + if (xr->y > 0) + return true; + + if (xr->cairo != NULL) + xr_draw_chart (cs->chart_item, xr->cairo, 0.0, 0.0, + xr_to_pt (xr->width), xr_to_pt (xr->length)); + xr->y = xr->length; + + return false; +} + +static void +xr_chart_destroy (struct xr_render_fsm *fsm) +{ + struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm); + + chart_item_unref (cs->chart_item); + free (cs); +} + +static struct xr_render_fsm * +xr_render_chart (const struct chart_item *chart_item) +{ + struct xr_chart_state *cs; + + cs = xmalloc (sizeof *cs); + cs->fsm.render = xr_chart_render; + cs->fsm.destroy = xr_chart_destroy; + cs->chart_item = chart_item_ref (chart_item); + + return &cs->fsm; +} + +static bool +xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr) +{ + return xr->y > 0; +} + +static void +xr_eject_destroy (struct xr_render_fsm *fsm UNUSED) +{ + /* Nothing to do. */ +} + +static struct xr_render_fsm * +xr_render_eject (void) +{ + static struct xr_render_fsm eject_renderer = + { + xr_eject_render, + xr_eject_destroy + }; + + return &eject_renderer; +} + +static struct xr_render_fsm * +xr_create_text_renderer (struct xr_driver *xr, const char *text) +{ + struct table_item *table_item; + struct xr_render_fsm *fsm; + + table_item = table_item_create (table_from_string (TAB_LEFT, text), NULL); + fsm = xr_render_table (xr, table_item); + table_item_unref (table_item); + + return fsm; +} + +static struct xr_render_fsm * +xr_render_text (struct xr_driver *xr, const struct text_item *text_item) +{ + enum text_item_type type = text_item_get_type (text_item); + const char *text = text_item_get_text (text_item); + + switch (type) + { + case TEXT_ITEM_TITLE: + free (xr->title); + xr->title = xstrdup (text); + break; + + case TEXT_ITEM_SUBTITLE: + free (xr->subtitle); + xr->subtitle = xstrdup (text); + break; + + case TEXT_ITEM_COMMAND_CLOSE: + break; + + case TEXT_ITEM_BLANK_LINE: + if (xr->y > 0) + xr->y += xr->char_height; + break; + + case TEXT_ITEM_EJECT_PAGE: + if (xr->y > 0) + return xr_render_eject (); + break; + + default: + return xr_create_text_renderer (xr, text); + } + + return NULL; +} + +static struct xr_render_fsm * +xr_render_message (struct xr_driver *xr, + const struct message_item *message_item) +{ + const struct msg *msg = message_item_get_msg (message_item); + struct xr_render_fsm *fsm; + char *s; + + s = msg_to_string (msg, xr->command_name); + fsm = xr_create_text_renderer (xr, s); + free (s); + + return fsm; +} + +static struct xr_render_fsm * +xr_render_output_item (struct xr_driver *xr, + const struct output_item *output_item) +{ + if (is_table_item (output_item)) + return xr_render_table (xr, to_table_item (output_item)); + else if (is_chart_item (output_item)) + return xr_render_chart (to_chart_item (output_item)); + else if (is_text_item (output_item)) + return xr_render_text (xr, to_text_item (output_item)); + else if (is_message_item (output_item)) + return xr_render_message (xr, to_message_item (output_item)); + else + return NULL; +}