src/core/SkBitmapProvider.cpp

   1 /*
   2  * Copyright 2015 Google Inc.
   3  *
   4  * Use of this source code is governed by a BSD-style license that can be
   5  * found in the LICENSE file.
   6  */
   7
   8 #include "SkBitmapProvider.h"
   9 #include "SkImage_Base.h"
  10 #include "SkImageCacherator.h"
  11 #include "SkPixelRef.h"
  12
  13 int SkBitmapProvider::width() const {
  14     return fImage->width();
  15 }
  16
  17 int SkBitmapProvider::height() const {
  18     return fImage->height();
  19 }
  20
  21 uint32_t SkBitmapProvider::getID() const {
  22     return fImage->uniqueID();
  23 }
  24
  25 SkImageInfo SkBitmapProvider::info() const {
  26     return as_IB(fImage)->onImageInfo();
  27 }
  28
  29 bool SkBitmapProvider::isVolatile() const {
  30     // add flag to images?
  31     const SkBitmap* bm = as_IB(fImage)->onPeekBitmap();
  32     return bm ? bm->isVolatile() : false;
  33 }
  34
  35 SkBitmapCacheDesc SkBitmapProvider::makeCacheDesc(int w, int h) const {
  36     return SkBitmapCacheDesc::Make(fImage, w, h);
  37 }
  38
  39 SkBitmapCacheDesc SkBitmapProvider::makeCacheDesc() const {
  40     return SkBitmapCacheDesc::Make(fImage);
  41 }
  42
  43 void SkBitmapProvider::notifyAddedToCache() const {
  44     as_IB(fImage)->notifyAddedToCache();
  45 }
  46
  47 bool SkBitmapProvider::asBitmap(SkBitmap* bm) const {
  48     return as_IB(fImage)->getROPixels(bm, fDstColorSpace, SkImage::kAllow_CachingHint);
  49 }
  50
  51 bool SkBitmapProvider::accessScaledImage(const SkRect& srcRect,
  52                                          const SkMatrix& invMatrix,
  53                                          SkFilterQuality fq,
  54                                          SkBitmap* scaledBitmap,
  55                                          SkRect* adjustedSrcRect,
  56                                          SkFilterQuality* adjustedFilterQuality) const {
  57     if (!fImage) {
  58         return false;
  59     }
  60
  61     SkImageCacherator* cacherator = as_IB(fImage)->peekCacherator();
  62     if (!cacherator) {
  63         return false;
  64     }
  65
  66     // TODO: stash the matrix someplace to avoid invert()?
  67     SkMatrix m;
  68     if (!invMatrix.invert(&m)) {
  69         return false;
  70     }
  71
  72     SkImageGenerator::ScaledImageRec rec;
  73     if (!cacherator->directAccessScaledImage(srcRect, m, fq, &rec) ||
  74         !scaledBitmap->installPixels(rec.fPixmap.info(), const_cast<void*>(rec.fPixmap.addr()),
  75                                      rec.fPixmap.rowBytes(), rec.fPixmap.ctable(),
  76                                      rec.fReleaseProc, rec.fReleaseCtx)) {
  77         return false;
  78     }
  79
  80     *adjustedSrcRect       = rec.fSrcRect;
  81     *adjustedFilterQuality = rec.fQuality;
  82
  83     return true;
  84 }