SkPixmapUtils Namespace Reference

Functions
SK_API bool	Orient (const SkPixmap &dst, const SkPixmap &src, SkEncodedOrigin origin)
SK_API SkImageInfo	SwapWidthHeight (const SkImageInfo &info)
template<typename Fn >
bool	Orient (const SkPixmap &dst, SkEncodedOrigin origin, Fn &&decode)

Function Documentation

Orient() [1/2]

bool SkPixmapUtils::Orient	(	const SkPixmap &	dst,
		const SkPixmap &	src,
		SkEncodedOrigin	origin
	)

Copy the pixels in src into dst, applying the orientation transformations specified by origin. If the inputs are invalid, this returns false and no copy is made.

Definition at line 44 of file SkPixmapUtils.cpp.

                                                                              {
    if (src.colorType() != dst.colorType()) {
        return false;
    }
    // note: we just ignore alphaType and colorSpace for this transformation
 
    int w = src.width();
    int h = src.height();
    if (SkEncodedOriginSwapsWidthHeight(origin)) {
        using std::swap;
        swap(w, h);
    }
    if (dst.width() != w || dst.height() != h) {
        return false;
    }
    if (w == 0 || h == 0) {
        return true;
    }
 
    // check for aliasing to self
    if (src.addr() == dst.addr()) {
        return kTopLeft_SkEncodedOrigin == origin;
    }
    return draw_orientation(dst, src, origin);
}

Orient() [2/2]

template<typename Fn >

bool SkPixmapUtils::Orient	(	const SkPixmap &	dst,
		SkEncodedOrigin	origin,
		Fn &&	decode
	)

Decode an image and then copy into dst, applying origin.

Parameters

dst	SkPixmap to write the final image, after applying the origin.
origin	SkEncodedOrigin to apply to the raw pixels.
decode	Function for decoding into a pixmap without applying the origin.

Definition at line 30 of file SkPixmapUtilsPriv.h.

                                                                      {
    SkAutoPixmapStorage storage;
    const SkPixmap* tmp = &dst;
    if (origin != kTopLeft_SkEncodedOrigin) {
        auto info = dst.info();
        if (SkEncodedOriginSwapsWidthHeight(origin)) {
            info = SwapWidthHeight(info);
        }
        if (!storage.tryAlloc(info)) {
            return false;
        }
        tmp = &storage;
    }
    if (!decode(*tmp)) {
        return false;
    }
    if (tmp != &dst) {
        return Orient(dst, *tmp, origin);
    }
    return true;
}

SwapWidthHeight()

SkImageInfo SkPixmapUtils::SwapWidthHeight

(

const SkImageInfo &

info

)

Return a copy of the provided ImageInfo with the width and height swapped.

Definition at line 70 of file SkPixmapUtils.cpp.

                                                     {
    return info.makeWH(info.height(), info.width());
}