update release date to actual daterelease-qpdf-2.0

git-svn-id: svn+q:///qpdf/trunk@599 71b93d88-0707-0410-a8cf-f5a4172ac649

1 files changed, 84 insertions, 0 deletions

diff --git a/libtests/png_filter.cc b/libtests/png_filter.cc
new file mode 100644
index 00000000..eef1aa3d
--- /dev/null
+++ b/libtests/png_filter.cc
@@ -0,0 +1,84 @@
+
+#include <qpdf/Pl_PNGFilter.hh>
+#include <qpdf/Pl_StdioFile.hh>
+
+#include <iostream>
+#include <errno.h>
+#include <assert.h>
+
+FILE* safe_fopen(char const* filename, char const* mode)
+{
+    FILE* result = fopen(filename, mode);
+    if (result == 0)
+    {
+	std::cerr << "fopen " << filename << " failed: " << strerror(errno)
+		  << std::endl;
+    }
+    return result;
+}
+
+void run(char const* filename, bool encode, unsigned int columns)
+{
+    // Decode the file
+    FILE* in = safe_fopen(filename, "rb");
+    FILE* o1 = safe_fopen("out", "wb");
+    Pipeline* out = new Pl_StdioFile("out", o1);
+    Pipeline* pl = new Pl_PNGFilter(
+	"png", out,
+	encode ? Pl_PNGFilter::a_encode : Pl_PNGFilter::a_decode,
+	columns, 0 /* not used */);
+    assert((2 * (columns + 1)) < 1024);
+    unsigned char buf[1024];
+    size_t len;
+    while (true)
+    {
+	len = fread(buf, 1, (2 * columns) + 1, in);
+	if (len == 0)
+	{
+	    break;
+	}
+	pl->write(buf, len);
+	len = fread(buf, 1, 1, in);
+	if (len == 0)
+	{
+	    break;
+	}
+	pl->write(buf, len);
+	len = fread(buf, 1, 1, in);
+	if (len == 0)
+	{
+	    break;
+	}
+	pl->write(buf, len);
+    }
+
+    pl->finish();
+    delete pl;
+    delete out;
+    fclose(o1);
+    fclose(in);
+
+    std::cout << "done" << std::endl;
+}
+
+int main(int argc, char* argv[])
+{
+    if (argc != 4)
+    {
+	std::cerr << "Usage: pipeline {en,de}code filename columns" << std::endl;
+	exit(2);
+    }
+    bool encode = (strcmp(argv[1], "encode") == 0);
+    char* filename = argv[2];
+    int columns = atoi(argv[3]);
+
+    try
+    {
+	run(filename, encode, columns);
+    }
+    catch (QEXC::General& e)
+    {
+	std::cout << e.unparse() << std::endl;
+    }
+    return 0;
+}