From 33c49228d078cc963ac5e59e526c97d2fd50a01f Mon Sep 17 00:00:00 2001
From: Robin Watts <robin.watts@artifex.com>
Date: Fri, 13 Mar 2015 17:09:29 +0000
Subject: Path packing for memory efficiency.

Introduce the concept of 'packed' paths. These reduce the header
overhead for most common paths (ones with less than 256 commands
and 256 coords) to a single 32bit int once stored in the
display list.

The previous commit reduces the torture-test.pdf from 95 to 87Meg.
This commit futher reduces it to 70Meg.
---
 include/mupdf/fitz/context.h | 30 ++++++++++++++++++++++++++++++
 include/mupdf/fitz/path.h    |  2 ++
 2 files changed, 32 insertions(+)

(limited to 'include')

diff --git a/include/mupdf/fitz/context.h b/include/mupdf/fitz/context.h
index f694bc39..e58e5f61 100644
--- a/include/mupdf/fitz/context.h
+++ b/include/mupdf/fitz/context.h
@@ -470,6 +470,19 @@ fz_keep_imp(fz_context *ctx, void *p, int *refs)
 	return p;
 }
 
+static inline void *
+fz_keep_imp8(fz_context *ctx, void *p, int8_t *refs)
+{
+	if (p)
+	{
+		fz_lock(ctx, FZ_LOCK_ALLOC);
+		if (*refs > 0)
+			++*refs;
+		fz_unlock(ctx, FZ_LOCK_ALLOC);
+	}
+	return p;
+}
+
 static inline int
 fz_drop_imp(fz_context *ctx, void *p, int *refs)
 {
@@ -487,4 +500,21 @@ fz_drop_imp(fz_context *ctx, void *p, int *refs)
 	return 0;
 }
 
+static inline int
+fz_drop_imp8(fz_context *ctx, void *p, int8_t *refs)
+{
+	if (p)
+	{
+		int drop;
+		fz_lock(ctx, FZ_LOCK_ALLOC);
+		if (*refs > 0)
+			drop = --*refs == 0;
+		else
+			drop = 0;
+		fz_unlock(ctx, FZ_LOCK_ALLOC);
+		return drop;
+	}
+	return 0;
+}
+
 #endif
diff --git a/include/mupdf/fitz/path.h b/include/mupdf/fitz/path.h
index 1bca1858..81b6f7bb 100644
--- a/include/mupdf/fitz/path.h
+++ b/include/mupdf/fitz/path.h
@@ -64,6 +64,8 @@ fz_path *fz_new_path(fz_context *ctx);
 fz_path *fz_keep_path(fz_context *ctx, fz_path *path);
 void fz_drop_path(fz_context *ctx, fz_path *path);
 void fz_trim_path(fz_context *ctx, fz_path *path);
+int fz_packed_path_size(const fz_path *path);
+int fz_pack_path(fz_context *ctx, uint8_t *pack, int max, const fz_path *path);
 
 fz_point fz_currentpoint(fz_context *ctx, fz_path *path);
 void fz_moveto(fz_context*, fz_path*, float x, float y);
-- 
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