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2bcad89b4c
* allow reading from stdin for dwebp / vwebp * allow writing to stdout for gif2webp by introducing a new function ExUtilReadFromStdin() Example use: cat in.webp | dwebp -o - -- - > out.png Note that the '-- -' option must appear *last* (as per general fashion for '--' option parsing) Change-Id: I8df0f3a246cc325925d6b6f668ba060f7dd81d68
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
// Copyright 2012 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// Utility functions used by the example programs.
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//
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#ifndef WEBP_EXAMPLES_EXAMPLE_UTIL_H_
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#define WEBP_EXAMPLES_EXAMPLE_UTIL_H_
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#include "webp/types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Allocates storage for entire file 'file_name' and returns contents and size
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// in 'data' and 'data_size'. Returns 1 on success, 0 otherwise. '*data' should
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// be deleted using free().
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// If 'file_name' is NULL or equal to "-", input is read from stdin by calling
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// the function ExUtilReadFromStdin().
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int ExUtilReadFile(const char* const file_name,
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const uint8_t** data, size_t* data_size);
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// Same as ExUtilReadFile(), but reads until EOF from stdin instead.
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int ExUtilReadFromStdin(const uint8_t** data, size_t* data_size);
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// Write a data segment into a file named 'file_name'. Returns true if ok.
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// If 'file_name' is NULL or equal to "-", output is written to stdout.
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int ExUtilWriteFile(const char* const file_name,
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const uint8_t* data, size_t data_size);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // WEBP_EXAMPLES_EXAMPLE_UTIL_H_
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