Add export to animated GIF, wrt GH-9

3rdparty/QtGifImage/include/gifimage/qgifimage_p.h

@@ -0,0 +1,75 @@
+/****************************************************************************
+** Copyright (c) 2013 Debao Zhang <hello@debao.me>
+** All right reserved.
+**
+** Permission is hereby granted, free of charge, to any person obtaining
+** a copy of this software and associated documentation files (the
+** "Software"), to deal in the Software without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Software, and to
+** permit persons to whom the Software is furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be
+** included in all copies or substantial portions of the Software.
+**
+** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+** NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+** LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+** OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+** WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+**
+****************************************************************************/
+#ifndef GIF_IMAGE_Q_GIF_IMAGE_P_H_
+#define GIF_IMAGE_Q_GIF_IMAGE_P_H_
+
+#include <giflib/gif_lib.h>
+#include <gifimage/qgifimage.h>
+
+#include <QVector>
+#include <QColor>
+
+struct QGifFrameInfoData {
+  QGifFrameInfoData() : delayTime(-1), interlace(false) {}
+
+public:
+  QImage image;
+  QPoint offset; //offset info of QImage will lost when convert from One format to another.
+  int delayTime;
+  bool interlace;
+  QColor transparentColor;
+};
+
+class QGifImagePrivate {
+  Q_DECLARE_PUBLIC(QGifImage)
+
+public:
+  explicit QGifImagePrivate(QGifImage *p);
+  ~QGifImagePrivate() = default;
+
+public:
+  bool load(QIODevice *device);
+  bool save(QIODevice *device) const;
+
+  QVector<QRgb> colorTableFromColorMapObject(ColorMapObject *object, int transColorIndex = -1) const;
+  [[nodiscard]] ColorMapObject *colorTableToColorMapObject(QVector<QRgb> colorTable) const;
+
+  [[nodiscard]] QSize getCanvasSize() const;
+  [[nodiscard]] int getFrameTransparentColorIndex(const QGifFrameInfoData &info) const;
+
+public:
+  QSize canvasSize;
+  int loopCount;
+  int defaultDelayTime;
+  QColor defaultTransparentColor;
+
+  QVector<QRgb> globalColorTable;
+  QColor bgColor;
+  QList<QGifFrameInfoData> frameInfos;
+
+  QGifImage *q_ptr;
+};
+
+#endif // GIF_IMAGE_Q_GIF_IMAGE_P_H_