/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkPixmapPriv_DEFINED
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#define SkPixmapPriv_DEFINED
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#include "SkPixmap.h"
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#include "SkEncodedOrigin.h"
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#include "SkAutoPixmapStorage.h"
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class SkPixmapPriv {
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public:
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/**
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* Copy the pixels in this pixmap into dst, applying the orientation transformations specified
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* by the flags. If the inputs are invalid, this returns false and no copy is made.
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*/
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static bool Orient(const SkPixmap& dst, const SkPixmap& src, SkEncodedOrigin);
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static bool ShouldSwapWidthHeight(SkEncodedOrigin o);
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static SkImageInfo SwapWidthHeight(const SkImageInfo& info);
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/**
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* Decode an image and then copy into dst, applying origin.
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*
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* @param dst SkPixmap to write the final image, after
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* applying the origin.
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* @param origin SkEncodedOrigin to apply to the raw pixels.
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* @param decode Function for decoding into a pixmap without
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* applying the origin.
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*/
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static bool Orient(const SkPixmap& dst, SkEncodedOrigin origin,
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std::function<bool(const SkPixmap&)> decode) {
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SkAutoPixmapStorage storage;
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const SkPixmap* tmp = &dst;
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if (origin != kTopLeft_SkEncodedOrigin) {
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auto info = dst.info();
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if (ShouldSwapWidthHeight(origin)) {
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info = SwapWidthHeight(info);
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}
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if (!storage.tryAlloc(info)) {
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return false;
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}
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tmp = &storage;
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}
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if (!decode(*tmp)) {
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return false;
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}
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if (tmp != &dst) {
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return Orient(dst, *tmp, origin);
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}
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return true;
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}
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static void ResetPixmapKeepInfo(SkPixmap* pm, const void* address, size_t rowBytes) {
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pm->fRowBytes = rowBytes;
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pm->fPixels = address;
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}
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};
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#endif
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