/* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/** * The header that comes right at the start of an icon file. (This * corresponds to the Windows ICONDIR structure.)
*/ struct IconFileHeader { /** * Must be set to 0;
*/
uint16_t mReserved; /** * 1 for icon (.ICO) image (or 2 for cursor (.CUR) image (icon with the * addition of a hotspot), but we don't support cursor).
*/
uint16_t mType; /** * The number of BMP/PNG images contained in the icon file.
*/
uint16_t mCount;
};
/** * For each BMP/PNG image that the icon file contains there must be a * corresponding icon dir entry. (This corresponds to the Windows * ICONDIRENTRY structure.) These entries are encoded directly after the * IconFileHeader.
*/ struct IconDirEntry {
uint8_t mWidth;
uint8_t mHeight; /** * The number of colors in the color palette of the BMP/PNG that this dir * entry corresponds to, or 0 if the image does not use a color palette.
*/
uint8_t mColorCount; /** * Should be set to 0.
*/
uint8_t mReserved; union {
uint16_t mPlanes; // ICO
uint16_t mXHotspot; // CUR
}; union {
uint16_t mBitCount; // ICO (bits per pixel)
uint16_t mYHotspot; // CUR
}; /** * "bytes in resource" is the length of the encoded BMP/PNG that this dir * entry corresponds to.
*/
uint32_t mBytesInRes; /** * The offset of the start of the encoded BMP/PNG that this dir entry * corresponds to (from the start of the icon file).
*/
uint32_t mImageOffset;
};
} // namespace image
} // namespace mozilla
#endif// mozilla_image_ICOFileHeaders_h
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