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acb297e9c2
If this flag is not used, RGB is premultiplied before comparison. Otherwise, the raw R/G/B values are compared, which can be a problem in transparent area (alpha=0 R/G/B=anything) Change-Id: I131cc10ec92414ad508b81f599a60d0097cac470
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
// Copyright 2015 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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// Utilities for animated images
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#ifndef WEBP_EXAMPLES_ANIM_UTIL_H_
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#define WEBP_EXAMPLES_ANIM_UTIL_H_
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#ifdef HAVE_CONFIG_H
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#include "webp/config.h"
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#endif
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#include <vector>
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#include "webp/types.h"
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struct DecodedFrame {
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std::vector<uint8_t> rgba; // Decoded and reconstructed full frame.
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int duration; // Frame duration in milliseconds.
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bool is_key_frame; // True if this frame is a key-frame.
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};
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struct AnimatedImage {
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uint32_t canvas_width;
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uint32_t canvas_height;
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uint32_t bgcolor;
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uint32_t loop_count;
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std::vector<DecodedFrame> frames;
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};
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// Read animated image file into 'AnimatedImage' struct.
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// If 'dump_frames' is true, dump frames to 'dump_folder'.
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bool ReadAnimatedImage(const char filename[], AnimatedImage* const image,
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bool dump_frames, const char dump_folder[]);
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// Given two RGBA buffers, calculate max pixel difference and PSNR.
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// If 'premultiply' is true, R/G/B values will be pre-multiplied by the
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// transparency before comparison.
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void GetDiffAndPSNR(const uint8_t rgba1[], const uint8_t rgba2[],
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uint32_t width, uint32_t height, bool premultiply,
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int* const max_diff, double* const psnr);
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#endif // WEBP_EXAMPLES_ANIM_UTIL_H_
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