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script: take advantage of the polymorphism of the interpreter

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If a function expects a surface but receives a context, it automatically
queries the context's target. We can take advantage of this to short-cut
a few operations.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2011-08-14 12:08:42 +01:00
parent 9dc9f24884
commit 0c6b892ce3
1 changed files with 20 additions and 17 deletions
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37
src/cairo-script-surface.c
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@ -428,29 +428,32 @@ _get_target (cairo_script_surface_t *surface)
{
cairo_script_context_t *ctx = to_context (surface);
if (target_is_active (surface)) {
_cairo_output_stream_puts (ctx->stream, "dup ");
return;
}
if (surface->defined) {
_cairo_output_stream_printf (ctx->stream, "s%u ",
surface->base.unique_id);
} else {
int depth = target_depth (surface);
assert (! cairo_list_is_empty (&surface->operand.link));
if (! target_is_active (surface)) {
int depth = target_depth (surface);
if (ctx->active) {
_cairo_output_stream_printf (ctx->stream, "%d index ", depth);
_cairo_output_stream_puts (ctx->stream, "/target get exch pop ");
} else {
if (depth == 1) {
_cairo_output_stream_puts (ctx->stream,
"exch\n");
} else {
_cairo_output_stream_printf (ctx->stream,
"%d -1 roll\n",
depth);
}
_cairo_output_stream_puts (ctx->stream, "/target get ");
}
assert (! target_is_active (surface));
if (ctx->active) {
_cairo_output_stream_printf (ctx->stream, "%d index ", depth);
_cairo_output_stream_puts (ctx->stream, "/target get exch pop ");
} else {
_cairo_output_stream_puts (ctx->stream, "/target get ");
if (depth == 1) {
_cairo_output_stream_puts (ctx->stream, "exch ");
} else {
_cairo_output_stream_printf (ctx->stream,
"%d -1 roll ", depth);
}
target_push (surface);
_cairo_output_stream_puts (ctx->stream, "dup ");
}
}
}