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Diffstat (limited to 'libstorycode/narrative_render_cairo.c')
-rw-r--r--libstorycode/narrative_render_cairo.c121
1 files changed, 71 insertions, 50 deletions
diff --git a/libstorycode/narrative_render_cairo.c b/libstorycode/narrative_render_cairo.c
index afc8f16..b50944a 100644
--- a/libstorycode/narrative_render_cairo.c
+++ b/libstorycode/narrative_render_cairo.c
@@ -39,6 +39,8 @@
#include "narrative_priv.h"
+const double dummy_h_val = 1024.0;
+
static double lcalc(struct length l, double pd)
{
@@ -61,12 +63,20 @@ static PangoAlignment to_pangoalignment(enum alignment align)
}
-static double wrap_text(struct narrative_item *item, PangoContext *pc,
- Stylesheet *ss, enum style_element el, double wrap_w,
- PangoFontDescription *fontdesc, enum alignment align)
+static void wrap_text(struct narrative_item *item, PangoContext *pc,
+ Stylesheet *ss, enum style_element el, double w)
{
PangoAlignment palignment;
PangoRectangle rect;
+ const char *font;
+ PangoFontDescription *fontdesc;
+ enum alignment align;
+ struct length paraspace[4];
+ double wrap_w;
+
+ font = stylesheet_get_font(ss, el, NULL, &align);
+ if ( font == NULL ) return;
+ fontdesc = pango_font_description_from_string(font);
if ( item->align == ALIGN_INHERIT ) {
/* Use value from stylesheet */
@@ -76,6 +86,15 @@ static double wrap_text(struct narrative_item *item, PangoContext *pc,
palignment = to_pangoalignment(item->align);
}
+ if ( stylesheet_get_paraspace(ss, el, paraspace) ) return;
+ item->space_l = lcalc(paraspace[0], w);
+ item->space_r = lcalc(paraspace[1], w);
+ item->space_t = lcalc(paraspace[2], dummy_h_val);
+ item->space_b = lcalc(paraspace[3], dummy_h_val);
+
+ /* Calculate width of actual text */
+ wrap_w = w - item->space_l - item->space_r;
+
if ( item->layout == NULL ) {
item->layout = pango_layout_new(pc);
}
@@ -88,24 +107,9 @@ static double wrap_text(struct narrative_item *item, PangoContext *pc,
//pango_layout_set_attributes(item->layout, attrs);
//pango_attr_list_unref(attrs);
- pango_layout_get_extents(item->layout, NULL, &rect);
- return pango_units_to_double(rect.height);
-}
-
-
-static double draw_text(struct narrative_item *item, cairo_t *cr)
-{
- PangoRectangle rect;
-
- //if ( (hpos + cur_h > min_y) && (hpos < max_y) ) {
- cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
- pango_cairo_update_layout(cr, item->layout);
- pango_cairo_show_layout(cr, item->layout);
- cairo_fill(cr);
- //} /* else paragraph is not visible */
pango_layout_get_extents(item->layout, NULL, &rect);
- return pango_units_to_double(rect.height);
+ item->h = pango_units_to_double(rect.height)+item->space_t+item->space_b;
}
@@ -114,40 +118,33 @@ int narrative_wrap(Narrative *n, Stylesheet *stylesheet, PangoLanguage *lang,
{
int i;
struct length pad[4];
- double pad_l, pad_r, pad_t, pad_b;
- const char *font;
- PangoFontDescription *fontdesc;
- double wrap_w;
- enum alignment align;
if ( stylesheet_get_padding(stylesheet, STYEL_NARRATIVE, pad) ) return 1;
- pad_l = lcalc(pad[0], w);
- pad_r = lcalc(pad[1], w);
- pad_t = lcalc(pad[2], 1024.0); /* dummy value, h not allowed in narrative */
- pad_b = lcalc(pad[3], 1024.0); /* dummy value, h not allowed in narrative */
- wrap_w = w - pad_l - pad_r;
+ n->space_l = lcalc(pad[0], w);
+ n->space_r = lcalc(pad[1], w);
+ n->space_t = lcalc(pad[2], dummy_h_val);
+ n->space_b = lcalc(pad[3], dummy_h_val);
n->w = w;
- n->total_h = pad_t + pad_b;
-
- font = stylesheet_get_font(stylesheet, STYEL_NARRATIVE, NULL, &align);
- if ( font == NULL ) return 1;
- fontdesc = pango_font_description_from_string(font);
+ w -= n->space_l + n->space_r;
for ( i=0; i<n->n_items; i++ ) {
switch ( n->items[i].type ) {
case NARRATIVE_ITEM_TEXT :
- n->total_h += wrap_text(&n->items[i], pc, stylesheet,
- STYEL_NARRATIVE, wrap_w, fontdesc,
- align);
+ wrap_text(&n->items[i], pc, stylesheet,
+ STYEL_NARRATIVE, w);
break;
case NARRATIVE_ITEM_BP :
- n->total_h += wrap_text(&n->items[i], pc, stylesheet,
- STYEL_NARRATIVE, wrap_w, fontdesc,
- align);
+ wrap_text(&n->items[i], pc, stylesheet,
+ STYEL_NARRATIVE_BP, w);
+ break;
+
+ case NARRATIVE_ITEM_PRESTITLE :
+ wrap_text(&n->items[i], pc, stylesheet,
+ STYEL_NARRATIVE_PRESTITLE, w);
break;
case NARRATIVE_ITEM_SLIDE :
@@ -165,10 +162,32 @@ int narrative_wrap(Narrative *n, Stylesheet *stylesheet, PangoLanguage *lang,
double narrative_get_height(Narrative *n)
{
- return n->total_h;
+ int i;
+ double total = 0.0;
+ for ( i=0; i<n->n_items; i++ ) {
+ total += n->items[i].h;
+ }
+ return total + n->space_t + n->space_b;
+}
+
+
+static void draw_text(struct narrative_item *item, cairo_t *cr)
+{
+ cairo_save(cr);
+ cairo_translate(cr, item->space_l, item->space_t);
+
+ //if ( (hpos + cur_h > min_y) && (hpos < max_y) ) {
+ cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
+ pango_cairo_update_layout(cr, item->layout);
+ pango_cairo_show_layout(cr, item->layout);
+ cairo_fill(cr);
+ //} /* else paragraph is not visible */
+
+ cairo_restore(cr);
}
+/* NB You must first call narrative_wrap() */
int narrative_render_cairo(Narrative *n, cairo_t *cr, Stylesheet *stylesheet)
{
int i, r;
@@ -176,13 +195,12 @@ int narrative_render_cairo(Narrative *n, cairo_t *cr, Stylesheet *stylesheet)
double bgcol[4];
double bgcol2[4];
cairo_pattern_t *patt = NULL;
- double vpos = 0.0;
r = stylesheet_get_background(stylesheet, STYEL_NARRATIVE, &bg, bgcol, bgcol2);
if ( r ) return 1;
/* Overall background */
- cairo_rectangle(cr, 0.0, 0.0, n->w, n->total_h);
+ cairo_rectangle(cr, 0.0, 0.0, n->w, narrative_get_height(n));
switch ( bg ) {
case GRAD_NONE:
@@ -190,7 +208,7 @@ int narrative_render_cairo(Narrative *n, cairo_t *cr, Stylesheet *stylesheet)
break;
case GRAD_VERT:
- patt = cairo_pattern_create_linear(0.0, 0.0, 0.0, n->total_h);
+ patt = cairo_pattern_create_linear(0.0, 0.0, 0.0, narrative_get_height(n));
cairo_pattern_add_color_stop_rgb(patt, 0.0, bgcol[0], bgcol[1], bgcol[2]);
cairo_pattern_add_color_stop_rgb(patt, 1.0, bgcol2[0], bgcol2[1], bgcol2[2]);
cairo_set_source(cr, patt);
@@ -206,19 +224,20 @@ int narrative_render_cairo(Narrative *n, cairo_t *cr, Stylesheet *stylesheet)
}
cairo_fill(cr);
- for ( i=0; i<n->n_items; i++ ) {
+ cairo_save(cr);
+ cairo_translate(cr, n->space_l, n->space_t);
- cairo_save(cr);
- cairo_translate(cr, 0.0, vpos);
+ for ( i=0; i<n->n_items; i++ ) {
switch ( n->items[i].type ) {
case NARRATIVE_ITEM_TEXT :
- vpos += draw_text(&n->items[i], cr);
+ case NARRATIVE_ITEM_PRESTITLE :
+ draw_text(&n->items[i], cr);
break;
case NARRATIVE_ITEM_BP :
- vpos += draw_text(&n->items[i], cr);
+ draw_text(&n->items[i], cr);
break;
case NARRATIVE_ITEM_SLIDE :
@@ -229,8 +248,10 @@ int narrative_render_cairo(Narrative *n, cairo_t *cr, Stylesheet *stylesheet)
}
- cairo_restore(cr);
+ cairo_translate(cr, 0.0, n->items[i].h);
}
+ cairo_restore(cr);
+
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 21:36:08 +0000