From d28129c2ff6a78c50877426f90167d63334ab18a Mon Sep 17 00:00:00 2001
From: Robin Watts <robin.watts@artifex.com>
Date: Thu, 23 Feb 2012 11:07:15 +0000
Subject: Add fz_trim_buffer function, and call it.

Remove stray space at the end of buffers.
---
 fitz/fitz.h       |  1 +
 fitz/stm_buffer.c | 12 ++++++++++++
 fitz/stm_read.c   |  1 +
 pdf/pdf_page.c    |  1 +
 4 files changed, 15 insertions(+)

diff --git a/fitz/fitz.h b/fitz/fitz.h
index 856df7e5..ddffa181 100644
--- a/fitz/fitz.h
+++ b/fitz/fitz.h
@@ -784,6 +784,7 @@ void fz_drop_buffer(fz_context *ctx, fz_buffer *buf);
 
 void fz_resize_buffer(fz_context *ctx, fz_buffer *buf, int size);
 void fz_grow_buffer(fz_context *ctx, fz_buffer *buf);
+void fz_trim_buffer(fz_context *ctx, fz_buffer *buf);
 
 /*
  * Resource store
diff --git a/fitz/stm_buffer.c b/fitz/stm_buffer.c
index 7f9d521d..d70118e1 100644
--- a/fitz/stm_buffer.c
+++ b/fitz/stm_buffer.c
@@ -28,7 +28,12 @@ fz_buffer *
 fz_keep_buffer(fz_context *ctx, fz_buffer *buf)
 {
 	if (buf)
+	{
+		if (buf->refs == 1 && buf->cap > buf->len+1)
+			fz_resize_buffer(ctx, buf, buf->len);
 		buf->refs ++;
+	}
+
 	return buf;
 }
 
@@ -58,3 +63,10 @@ fz_grow_buffer(fz_context *ctx, fz_buffer *buf)
 {
 	fz_resize_buffer(ctx, buf, (buf->cap * 3) / 2);
 }
+
+void
+fz_trim_buffer(fz_context *ctx, fz_buffer *buf)
+{
+	if (buf->cap > buf->len+1)
+		fz_resize_buffer(ctx, buf, buf->len);
+}
diff --git a/fitz/stm_read.c b/fitz/stm_read.c
index 81411c54..c2d375f3 100644
--- a/fitz/stm_read.c
+++ b/fitz/stm_read.c
@@ -125,6 +125,7 @@ fz_read_all(fz_stream *stm, int initial)
 		fz_drop_buffer(ctx, buf);
 		fz_rethrow(ctx);
 	}
+	fz_trim_buffer(ctx, buf);
 
 	return buf;
 }
diff --git a/pdf/pdf_page.c b/pdf/pdf_page.c
index f2bf713e..de8e7051 100644
--- a/pdf/pdf_page.c
+++ b/pdf/pdf_page.c
@@ -277,6 +277,7 @@ pdf_load_page_contents_array(pdf_document *xref, fz_obj *list)
 		fz_drop_buffer(ctx, big);
 		fz_throw(ctx, "cannot load content stream");
 	}
+	fz_trim_buffer(ctx, big);
 
 	return big;
 }
-- 
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