diff options
Diffstat (limited to 'src/render.c')
| -rw-r--r-- | src/render.c | 416 |
1 files changed, 72 insertions, 344 deletions
diff --git a/src/render.c b/src/render.c index 0650f96..3077c36 100644 --- a/src/render.c +++ b/src/render.c @@ -38,293 +38,22 @@ #include "presentation.h" #include "frame.h" #include "render.h" +#include "wrap.h" -struct renderstuff +static void render_glyph_box(cairo_t *cr, struct wrap_box *box) { - cairo_t *cr; - PangoContext *pc; - PangoFontMap *fontmap; - PangoAttrList *attrs; - - /* Text for the block currently being processed */ - const char *cur_text; - int cur_len; - - int wrap_w; /* Pango units */ - - struct frame *fr; -}; - - -static void free_line_bits(struct wrap_line *l) -{ - int i; - for ( i=0; i<l->n_boxes; i++ ) { - - switch ( l->boxes[i].type ) { - - case WRAP_BOX_PANGO : - pango_glyph_item_free(l->boxes[i].glyph_item); - free(l->boxes[i].text); - break; - - } - - } - - free(l->boxes); -} - - -static void alloc_lines(struct frame *fr) -{ - struct wrap_line *lines_new; - - lines_new = realloc(fr->lines, fr->max_lines * sizeof(struct wrap_line)); - if ( lines_new == NULL ) { - fprintf(stderr, "Couldn't allocate memory for lines!\n"); - return; - } - - fr->lines = lines_new; -} - - -static void alloc_boxes(struct wrap_line *l) -{ - struct wrap_box *boxes_new; - - boxes_new = realloc(l->boxes, l->max_boxes * sizeof(struct wrap_box)); - if ( boxes_new == NULL ) { - fprintf(stderr, "Couldn't allocate memory for boxes!\n"); - return; - } - - l->boxes = boxes_new; -} - - -static void add_glyph_box_to_line(struct wrap_line *line, PangoGlyphItem *gi, - char *text) -{ - PangoRectangle rect; - int ascent; - - if ( line->n_boxes == line->max_boxes ) { - line->max_boxes += 32; - alloc_boxes(line); - if ( line->n_boxes == line->max_boxes ) return; - } - - pango_glyph_string_extents(gi->glyphs, gi->item->analysis.font, - NULL, &rect); - - line->boxes[line->n_boxes].type = WRAP_BOX_PANGO; - line->boxes[line->n_boxes].glyph_item = gi; - line->boxes[line->n_boxes].text = text; - line->boxes[line->n_boxes].width = rect.width; - line->n_boxes++; - - line->width += rect.width; - if ( line->height < rect.height ) line->height = rect.height; - - ascent = PANGO_ASCENT(rect); - if ( ascent > line->ascent ) line->ascent = ascent; -} - - -static const char *add_chars_to_line(struct renderstuff *s, - PangoGlyphItem *orig, int n, - const char *cur_text_ptr) -{ - int split_len; - char *split_ptr; - char *before_text; - - split_ptr = g_utf8_offset_to_pointer(cur_text_ptr, n); - before_text = strndup(cur_text_ptr, split_ptr-cur_text_ptr); - if ( before_text == NULL ) { - fprintf(stderr, "Failed to split text\n"); - /* But continue */ - } - - if ( n < orig->item->num_chars ) { - - PangoGlyphItem *before; - - split_len = split_ptr - cur_text_ptr; - - before = pango_glyph_item_split(orig, cur_text_ptr, split_len); - - add_glyph_box_to_line(&s->fr->lines[s->fr->n_lines], - before, before_text); - - orig->item->offset = 0; - - } else { - - PangoGlyphItem *copy; - copy = pango_glyph_item_copy(orig); - add_glyph_box_to_line(&s->fr->lines[s->fr->n_lines], - copy, before_text); - - } - - return split_ptr; -} - - -static void initialise_line(struct wrap_line *l) -{ - l->n_boxes = 0; - l->max_boxes = 32; - l->boxes = NULL; - l->width = 0; - l->height = 0; - l->ascent = 0; - alloc_boxes(l); -} - - -static void dispatch_line(struct renderstuff *s) -{ - s->fr->n_lines++; - - if ( s->fr->n_lines == s->fr->max_lines ) { - s->fr->max_lines += 32; - alloc_lines(s->fr); - if ( s->fr->n_lines == s->fr->max_lines ) return; - } - - initialise_line(&s->fr->lines[s->fr->n_lines]); -} - - -static void wrap_text(gpointer data, gpointer user_data) -{ - struct renderstuff *s = user_data; - PangoItem *item = data; - PangoGlyphString *glyphs; - PangoLogAttr *log_attrs; - PangoGlyphItem gitem; - int *log_widths; - int width_remain; - int width_used; - int i, pos, n; - const char *ptr; - - log_attrs = calloc(item->num_chars+1, sizeof(PangoLogAttr)); - if ( log_attrs == NULL ) { - fprintf(stderr, "Failed to allocate memory for log attrs\n"); - return; - } - - log_widths = calloc(item->num_chars+1, sizeof(int)); - if ( log_widths == NULL ) { - fprintf(stderr, "Failed to allocate memory for log widths\n"); - return; - } - - pango_get_log_attrs(s->cur_text, s->cur_len, -1, - pango_language_get_default(), - log_attrs, item->num_chars+1); - - glyphs = pango_glyph_string_new(); - pango_shape(s->cur_text+item->offset, item->length, &item->analysis, - glyphs); - - pango_glyph_string_get_logical_widths(glyphs, s->cur_text+item->offset, - item->length, 0, log_widths); - gitem.glyphs = glyphs; - gitem.item = item; - - /* FIXME: Replace this with a real typesetting algorithm */ - width_remain = s->wrap_w*PANGO_SCALE - - s->fr->lines[s->fr->n_lines].width; - width_used = 0; - pos = 0; - n = item->num_chars; - ptr = s->cur_text; - for ( i=0; i<n; i++ ) { - - if ( !log_attrs[i].is_char_break ) { - width_used += log_widths[i]; - pos++; - continue; - } - - if ( log_attrs[i].is_mandatory_break - || (log_widths[i] + width_used > width_remain) ) { - - ptr = add_chars_to_line(s, &gitem, pos, ptr); - - /* New line */ - dispatch_line(s); - width_remain = s->wrap_w * PANGO_SCALE; - width_used = 0; - pos = 0; - - } - - pos++; - width_used += log_widths[i]; - - } - ptr = add_chars_to_line(s, &gitem, pos, ptr); - - /* Don't dispatch the last line, because the next item might add - * more text to it, or the next SC block might add something else. */ - - free(log_widths); - free(log_attrs); -} - - -static void process_sc_block(struct renderstuff *s, const char *sc_name, - const char *sc_options, const char *sc_contents) -{ - size_t len; - GList *item_list; - - /* Only process textual blocks, for now */ - if ( sc_name != NULL ) return; - if ( sc_options != NULL ) { - fprintf(stderr, "Block has options. WTF?\n"); - return; - } - - /* Empty block? */ - if ( sc_contents == NULL ) return; - - len = strlen(sc_contents); - if ( len == 0 ) return; - - /* Create glyph string */ - item_list = pango_itemize(s->pc, sc_contents, 0, len, s->attrs, NULL); - s->cur_text = sc_contents; - s->cur_len = len; - g_list_foreach(item_list, wrap_text, s); - - g_list_free(item_list); -} - - -static double render_glyph_box(cairo_t *cr, struct wrap_box *box) -{ - double box_w; - if ( box->glyph_item == NULL ) { + if ( box->glyphs == NULL ) { fprintf(stderr, "Box %p has NULL pointer.\n", box); - return 0.0; + return; } - cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0); /* FIXME: Colour */ - pango_cairo_show_glyph_item(cr, box->text, box->glyph_item); - box_w = pango_glyph_string_get_width(box->glyph_item->glyphs); - return box_w; + cairo_set_source_rgba(cr, box->col[0], box->col[1], box->col[2], + box->col[3]); + pango_cairo_glyph_string_path(cr, box->font, box->glyphs); } -static void render_boxes(struct wrap_line *line, struct renderstuff *s) +static void render_boxes(struct wrap_line *line, cairo_t *cr) { int j; double x_pos = 0.0; @@ -333,65 +62,89 @@ static void render_boxes(struct wrap_line *line, struct renderstuff *s) struct wrap_box *box; - cairo_save(s->cr); + cairo_save(cr); box = &line->boxes[j]; - cairo_rel_move_to(s->cr, x_pos, 0.0); + cairo_rel_move_to(cr, x_pos, 0.0); switch ( line->boxes[j].type ) { case WRAP_BOX_PANGO : - render_glyph_box(s->cr, box); + render_glyph_box(cr, box); + break; + + case WRAP_BOX_IMAGE : + /* FIXME ! */ break; } x_pos += (double)line->boxes[j].width / PANGO_SCALE; - cairo_restore(s->cr); + cairo_restore(cr); } } -static void render_lines(struct renderstuff *s) +static void render_lines(struct frame *fr, cairo_t *cr) { int i; double y_pos = 0.0; - for ( i=0; i<s->fr->n_lines; i++ ) { + for ( i=0; i<fr->n_lines; i++ ) { - double asc = s->fr->lines[i].ascent/PANGO_SCALE; + double asc = fr->lines[i].ascent/PANGO_SCALE; - //cairo_move_to(s->cr, 0, y_pos+asc+0.5); - //cairo_line_to(s->cr, s->lines[i].width, y_pos+asc+0.5); - //cairo_set_source_rgb(s->cr, 0.0, 0.0, 0.0); - //cairo_set_line_width(s->cr, 1.0); - //cairo_stroke(s->cr); + //cairo_move_to(cr, 0, y_pos+asc+0.5); + //cairo_line_to(cr, s->lines[i].width, y_pos+asc+0.5); + //cairo_set_source_rgb(cr, 0.0, 0.0, 0.0); + //cairo_set_line_width(cr, 1.0); + //cairo_stroke(cr); /* Move to beginning of the line */ - cairo_move_to(s->cr, 0.0, asc+y_pos); + cairo_move_to(cr, 0.0, asc+y_pos); /* Render the line */ - render_boxes(&s->fr->lines[i], s); + render_boxes(&fr->lines[i], cr); /* FIXME: line spacing */ - y_pos += s->fr->lines[i].height/PANGO_SCALE + 0.0; + y_pos += fr->lines[i].height/PANGO_SCALE + 0.0; + + } +} + + +static void free_line_bits(struct wrap_line *l) +{ + int i; + for ( i=0; i<l->n_boxes; i++ ) { + + switch ( l->boxes[i].type ) { + + case WRAP_BOX_PANGO : + pango_glyph_string_free(l->boxes[i].glyphs); + free(l->boxes[i].text); + break; + + case WRAP_BOX_IMAGE : + break; + + } } + + free(l->boxes); } /* Render Level 1 Storycode (no subframes) */ static int render_sc(struct frame *fr) { - PangoFontDescription *fontdesc; - struct renderstuff s; - PangoAttribute *attr_font; - SCBlockList *bl; - SCBlockListIterator *iter; - struct scblock *b; int i; + cairo_t *cr; + PangoFontMap *fontmap; + PangoContext *pc; for ( i=0; i<fr->n_lines; i++ ) { free_line_bits(&fr->lines[i]); @@ -403,62 +156,37 @@ static int render_sc(struct frame *fr) if ( fr->sc == NULL ) return 0; - bl = sc_find_blocks(fr->sc, NULL); - - if ( bl == NULL ) { - printf("Failed to find blocks.\n"); - return 0; - } - - s.wrap_w = fr->w - fr->lop.pad_l - fr->lop.pad_r; - s.fr = fr; - s.fr->lines = NULL; - s.fr->n_lines = 0; - s.fr->max_lines = 64; - alloc_lines(s.fr); - initialise_line(&s.fr->lines[0]); - - /* Find and load font */ - s.fontmap = pango_cairo_font_map_get_default(); - s.pc = pango_font_map_create_context(s.fontmap); - fontdesc = pango_font_description_from_string("Sorts Mill Goudy 16"); - - /* Set up attribute list to use the font */ - s.attrs = pango_attr_list_new(); - attr_font = pango_attr_font_desc_new(fontdesc); - pango_attr_list_insert_before(s.attrs, attr_font); - pango_font_description_free(fontdesc); - - /* Iterate through SC blocks and send each one in turn for processing */ - for ( b = sc_block_list_first(bl, &iter); - b != NULL; - b = sc_block_list_next(bl, iter) ) - { - process_sc_block(&s, b->name, b->options, b->contents); - } - sc_block_list_free(bl); - dispatch_line(&s); - - /* Create surface and render the contents */ + /* Create surface and Cairo stuff */ if ( fr->contents != NULL ) cairo_surface_destroy(fr->contents); fr->contents = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, fr->w, fr->h); - s.cr = cairo_create(fr->contents); + cr = cairo_create(fr->contents); cairo_font_options_t *fopts; fopts = cairo_font_options_create(); cairo_font_options_set_hint_style(fopts, CAIRO_HINT_STYLE_NONE); cairo_font_options_set_hint_metrics(fopts, CAIRO_HINT_METRICS_DEFAULT); cairo_font_options_set_antialias(fopts, CAIRO_ANTIALIAS_GRAY); - cairo_set_font_options(s.cr, fopts); + cairo_set_font_options(cr, fopts); - cairo_translate(s.cr, fr->lop.pad_l, fr->lop.pad_t); - render_lines(&s); + /* Find and load font */ + fontmap = pango_cairo_font_map_get_default(); + pc = pango_font_map_create_context(fontmap); + /* Set up lines */ + if ( wrap_contents(fr, pc) ) { + fprintf(stderr, "Failed to wrap lines.\n"); + return 1; + } + + /* Actually render the lines */ + cairo_translate(cr, fr->lop.pad_l, fr->lop.pad_t); + render_lines(fr, cr); + + /* Tidy up */ cairo_font_options_destroy(fopts); - cairo_destroy(s.cr); - pango_attr_list_unref(s.attrs); - g_object_unref(s.pc); + cairo_destroy(cr); + g_object_unref(pc); return 0; } |