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Allow nested calls to knockout rendering (stops iframes from flushing the current data).

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svn path=/trunk/netsurf/; revision=2692
This commit is contained in:
Richard Wilson 2006-07-02 16:17:51 +00:00
parent a1e42c14a2
commit 0f36a3e6a5
1 changed files with 42 additions and 15 deletions
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57
desktop/knockout.c
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@ -22,9 +22,12 @@
#define KNOCKOUT_BOXES 768 /* 28 bytes each */
#define KNOCKOUT_POLYGONS 3072 /* 4 bytes each */
struct knockout_box;
struct knockout_entry;
static bool knockout_plot_flush(void);
static void knockout_calculate(int x0, int y0, int x1, int y1, struct knockout_box *box);
static bool knockout_plot_fill_recursive(struct knockout_box *box, colour c);
static bool knockout_plot_bitmap_tile_recursive(struct knockout_box *box,
@ -208,6 +211,7 @@ int clip_x0_cur;
int clip_y0_cur;
int clip_x1_cur;
int clip_y1_cur;
int nested_depth = 0;
/**
@ -218,6 +222,13 @@ int clip_y1_cur;
*/
bool knockout_plot_start(struct plotter_table *plotter)
{
/* check if we're recursing */
if (nested_depth++ > 0) {
/* we should already have the knockout renderer as default */
assert(!memcmp(plotter, &knockout_plotters, sizeof(struct plotter_table)));
return true;
}
/* end any previous sessions */
if (knockout_entry_cur > 0)
knockout_plot_end();
@ -235,6 +246,22 @@ bool knockout_plot_start(struct plotter_table *plotter)
* \return true on success, false otherwise
*/
bool knockout_plot_end(void)
{
/* only output when we've finished any nesting */
if (--nested_depth == 0)
return knockout_plot_flush();
assert(nested_depth > 0);
return true;
}
/**
* Flush the current knockout session to empty the buffers
*
* \return true on success, false otherwise
*/
bool knockout_plot_flush(void)
{
int i;
bool success = true;
@ -448,7 +475,7 @@ void knockout_calculate(int x0, int y0, int x1, int y1, struct knockout_box *own
} else {
/* we need a maximum of 4 child boxes */
if (knockout_box_cur + 4 >= KNOCKOUT_BOXES) {
knockout_plot_start(&real_plot);
knockout_plot_flush();
return;
}
@ -574,7 +601,7 @@ bool knockout_plot_rectangle(int x0, int y0, int width, int height,
knockout_entries[knockout_entry_cur].data.rectangle.dashed = dashed;
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_RECTANGLE;
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
knockout_plot_start(&real_plot);
knockout_plot_flush();
return true;
}
@ -592,7 +619,7 @@ bool knockout_plot_line(int x0, int y0, int x1, int y1, int width,
knockout_entries[knockout_entry_cur].data.line.dashed = dashed;
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_LINE;
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
knockout_plot_start(&real_plot);
knockout_plot_flush();
return true;
}
@ -606,13 +633,13 @@ bool knockout_plot_polygon(int *p, unsigned int n, colour fill)
if (n * 2 >= KNOCKOUT_POLYGONS) {
knockout_plot_end();
success = plot.polygon(p, n, fill);
knockout_plot_start(&real_plot);
knockout_plot_flush();
return success;
}
/* ensure we have enough room right now */
if (knockout_polygon_cur + n * 2 >= KNOCKOUT_POLYGONS)
knockout_plot_start(&real_plot);
knockout_plot_flush();
/* copy our data */
dest = &(knockout_polygons[knockout_polygon_cur]);
@ -623,7 +650,7 @@ bool knockout_plot_polygon(int *p, unsigned int n, colour fill)
knockout_entries[knockout_entry_cur].data.polygon.fill = fill;
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_POLYGON;
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
knockout_plot_start(&real_plot);
knockout_plot_flush();
return true;
}
@ -660,7 +687,7 @@ bool knockout_plot_fill(int x0, int y0, int x1, int y1, colour c)
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_FILL;
if ((++knockout_entry_cur >= KNOCKOUT_ENTRIES) ||
(++knockout_box_cur >= KNOCKOUT_BOXES))
knockout_plot_start(&real_plot);
knockout_plot_flush();
return true;
}
@ -686,7 +713,7 @@ bool knockout_plot_clip(int clip_x0, int clip_y0,
knockout_entries[knockout_entry_cur].data.clip.y1 = clip_y1;
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_CLIP;
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
knockout_plot_start(&real_plot);
knockout_plot_flush();
return true;
}
@ -703,7 +730,7 @@ bool knockout_plot_text(int x, int y, struct css_style *style,
knockout_entries[knockout_entry_cur].data.text.c = c;
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_TEXT;
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
knockout_plot_start(&real_plot);
knockout_plot_flush();
return true;
}
@ -717,7 +744,7 @@ bool knockout_plot_disc(int x, int y, int radius, colour colour, bool filled)
knockout_entries[knockout_entry_cur].data.disc.filled = filled;
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_DISC;
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
knockout_plot_start(&real_plot);
knockout_plot_flush();
return true;
}
@ -731,7 +758,7 @@ bool knockout_plot_arc(int x, int y, int radius, int angle1, int angle2, colour
knockout_entries[knockout_entry_cur].data.arc.c = c;
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_ARC;
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
knockout_plot_start(&real_plot);
knockout_plot_flush();
return true;
}
@ -760,7 +787,7 @@ bool knockout_plot_bitmap(int x, int y, int width, int height,
knockout_entries[knockout_entry_cur].data.bitmap.bg = bg;
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_BITMAP;
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
knockout_plot_start(&real_plot);
knockout_plot_flush();
return true;
}
@ -816,7 +843,7 @@ bool knockout_plot_bitmap_tile(int x, int y, int width, int height,
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_BITMAP_TILE;
if ((++knockout_entry_cur >= KNOCKOUT_ENTRIES) ||
(++knockout_box_cur >= KNOCKOUT_BOXES))
knockout_plot_start(&real_plot);
knockout_plot_flush();
return knockout_plot_clip(clip_x0_cur, clip_y0_cur, clip_x1_cur, clip_y1_cur);
}
@ -825,7 +852,7 @@ bool knockout_plot_group_start(const char *name)
knockout_entries[knockout_entry_cur].data.group_start.name = name;
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_GROUP_START;
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
knockout_plot_start(&real_plot);
knockout_plot_flush();
return true;
}
@ -833,6 +860,6 @@ bool knockout_plot_group_end(void)
{
knockout_entries[knockout_entry_cur].type = KNOCKOUT_PLOT_GROUP_END;
if (++knockout_entry_cur >= KNOCKOUT_ENTRIES)
knockout_plot_start(&real_plot);
knockout_plot_flush();
return true;
}