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_cairo_xlib_surface_show_glyphs: Break up rendering into chunks to fit

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into X max request length protocol limits.

This fixes bug #5528:

	_XError from XRenderCompositeText8
	https://bugs.freedesktop.org/show_bug.cgi?id=5528
This commit is contained in:
Carl Worth 2006-03-03 11:13:36 -08:00
parent 3aac0bf670
commit 7d498ca912
1 changed files with 42 additions and 19 deletions
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61
src/cairo-xlib-surface.c
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@ -41,6 +41,7 @@
#include "cairo-xlib-test.h"
#include "cairo-xlib-private.h"
#include <X11/extensions/Xrender.h>
#include <X11/extensions/renderproto.h>
/* Xlib doesn't define a typedef, so define one ourselves */
typedef int (*cairo_xlib_error_func_t) (Display *display,
@ -2710,7 +2711,9 @@ _cairo_xlib_surface_show_glyphs (cairo_scaled_font_t *scaled_font,
cairo_xlib_surface_t *src;
glyphset_cache_t *cache;
cairo_glyph_cache_key_t key;
glyphset_cache_entry_t **entries;
const cairo_glyph_t *glyphs_chunk;
glyphset_cache_entry_t **entries, **entries_chunk;
int glyphs_remaining, chunk_size, max_chunk_size;
glyphset_cache_entry_t *stack_entries [N_STACK_BUF];
composite_operation_t operation;
int i;
@ -2777,26 +2780,46 @@ _cairo_xlib_surface_show_glyphs (cairo_scaled_font_t *scaled_font,
/* Call the appropriate sub-function. */
_cairo_xlib_surface_ensure_dst_picture (self);
max_chunk_size = XMaxRequestSize (self->dpy);
if (elt_size == 8)
max_chunk_size -= sz_xRenderCompositeGlyphs8Req;
if (elt_size == 16)
max_chunk_size -= sz_xRenderCompositeGlyphs16Req;
if (elt_size == 32)
max_chunk_size -= sz_xRenderCompositeGlyphs32Req;
max_chunk_size /= sz_xGlyphElt;
for (glyphs_remaining = num_glyphs, glyphs_chunk = glyphs, entries_chunk = entries;
glyphs_remaining;
glyphs_remaining -= chunk_size, glyphs_chunk += chunk_size, entries_chunk += chunk_size)
{
status = _cairo_xlib_surface_show_glyphs8 (scaled_font, operator, cache, &key, src, self,
source_x + attributes.x_offset - dest_x,
source_y + attributes.y_offset - dest_y,
glyphs, entries, num_glyphs);
}
else if (elt_size == 16)
{
status = _cairo_xlib_surface_show_glyphs16 (scaled_font, operator, cache, &key, src, self,
source_x + attributes.x_offset - dest_x,
source_y + attributes.y_offset - dest_y,
glyphs, entries, num_glyphs);
}
else
{
status = _cairo_xlib_surface_show_glyphs32 (scaled_font, operator, cache, &key, src, self,
source_x + attributes.x_offset - dest_x,
source_y + attributes.y_offset - dest_y,
glyphs, entries, num_glyphs);
chunk_size = MIN (glyphs_remaining, max_chunk_size);
if (elt_size == 8)
{
status = _cairo_xlib_surface_show_glyphs8 (scaled_font, operator, cache, &key, src, self,
source_x + attributes.x_offset - dest_x,
source_y + attributes.y_offset - dest_y,
glyphs_chunk, entries_chunk, chunk_size);
}
else if (elt_size == 16)
{
status = _cairo_xlib_surface_show_glyphs16 (scaled_font, operator, cache, &key, src, self,
source_x + attributes.x_offset - dest_x,
source_y + attributes.y_offset - dest_y,
glyphs_chunk, entries_chunk, chunk_size);
}
else
{
status = _cairo_xlib_surface_show_glyphs32 (scaled_font, operator, cache, &key, src, self,
source_x + attributes.x_offset - dest_x,
source_y + attributes.y_offset - dest_y,
glyphs_chunk, entries_chunk, chunk_size);
}
if (status != CAIRO_STATUS_SUCCESS)
break;
}
if (status == CAIRO_STATUS_SUCCESS &&