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PS: Implement reflected surface patterns

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The image/meta-pattern is written once. A PS pattern twice the size of
the cairo pattern is created and the surface drawn four times in a
reflect pattern inside the PS pattern.

This fixes the extend-reflect and extend-reflect-similar PS test
failures.
This commit is contained in:
Adrian Johnson 2008-02-03 19:34:53 +10:30
parent 7c5bc5fde8
commit a74e669234
1 changed files with 33 additions and 8 deletions
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41
src/cairo-ps-surface.c
View file

@ -2337,12 +2337,15 @@ _cairo_ps_surface_emit_meta_surface (cairo_ps_surface_t *surface,
surface->height = meta_extents.height;
_cairo_output_stream_printf (surface->stream,
"/CairoPattern {\n"
"gsave\n");
" gsave\n"
" 0 0 %f %f rectclip\n",
surface->width,
surface->height);
if (cairo_surface_get_content (meta_surface) == CAIRO_CONTENT_COLOR) {
surface->content = CAIRO_CONTENT_COLOR;
_cairo_output_stream_printf (surface->stream,
"0 G 0 0 %f %f rectfill\n",
" 0 G 0 0 %f %f rectfill\n",
surface->width,
surface->height);
}
@ -2354,7 +2357,7 @@ _cairo_ps_surface_emit_meta_surface (cairo_ps_surface_t *surface,
return status;
_cairo_output_stream_printf (surface->stream,
"grestore\n"
" grestore\n"
"} bind def\n");
surface->content = old_content;
surface->width = old_width;
@ -2479,10 +2482,13 @@ _cairo_ps_surface_emit_surface_pattern (cairo_ps_surface_t *surface,
break;
}
case CAIRO_EXTEND_REPEAT:
case CAIRO_EXTEND_REFLECT:
xstep = pattern_width;
ystep = pattern_height;
break;
case CAIRO_EXTEND_REFLECT:
xstep = pattern_width*2;
ystep = pattern_height*2;
break;
/* All the rest (if any) should have been analyzed away, so these
* cases should be unreachable. */
default:
@ -2495,15 +2501,34 @@ _cairo_ps_surface_emit_surface_pattern (cairo_ps_surface_t *surface,
"<< /PatternType 1\n"
" /PaintType 1\n"
" /TilingType 1\n");
_cairo_output_stream_printf (surface->stream,
" /BBox [0 0 %d %d]\n",
pattern_width, pattern_height);
_cairo_output_stream_printf (surface->stream,
" /XStep %f /YStep %f\n",
xstep, ystep);
if (pattern->base.extend == CAIRO_EXTEND_REFLECT) {
_cairo_output_stream_printf (surface->stream,
" /BBox [0 0 %d %d]\n"
" /PaintProc {\n"
" CairoPattern\n"
" [-1 0 0 1 %d 0] concat CairoPattern\n"
" [ 1 0 0 -1 0 %d] concat CairoPattern\n"
" [-1 0 0 1 %d 0] concat CairoPattern\n"
" CairoPattern\n"
" } bind\n",
pattern_width*2, pattern_height*2,
pattern_width*2,
pattern_height*2,
pattern_width*2);
} else {
_cairo_output_stream_printf (surface->stream,
" /BBox [0 0 %d %d]\n"
" /PaintProc { CairoPattern } bind\n",
pattern_width, pattern_height);
}
_cairo_output_stream_printf (surface->stream,
" /PaintProc { CairoPattern } bind\n"
">>\n");
_cairo_output_stream_printf (surface->stream,
"[ %f %f %f %f %f %f ]\n",
inverse.xx, inverse.yx,