src/third_party/skia/tools/CopyTilesRenderer.cpp

   1 /*
   2  * Copyright 2012 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 "picture_utils.h"
   9 #include "CopyTilesRenderer.h"
  10 #include "SkCanvas.h"
  11 #include "SkDevice.h"
  12 #include "SkImageEncoder.h"
  13 #include "SkPicture.h"
  14 #include "SkPixelRef.h"
  15 #include "SkRect.h"
  16 #include "SkString.h"
  17
  18 namespace sk_tools {
  19     CopyTilesRenderer::CopyTilesRenderer(int x, int y)
  20     : fXTilesPerLargeTile(x)
  21     , fYTilesPerLargeTile(y) {
  22     }
  23     void CopyTilesRenderer::init(const SkPicture* pict, const SkString* writePath,
  24                                  const SkString* mismatchPath, const SkString* inputFilename,
  25                                  bool useChecksumBasedFilenames) {
  26         // Do not call INHERITED::init(), which would create a (potentially large) canvas which is
  27         // not used by bench_pictures.
  28         SkASSERT(pict != NULL);
  29         // Only work with absolute widths (as opposed to percentages).
  30         SkASSERT(this->getTileWidth() != 0 && this->getTileHeight() != 0);
  31         fPicture.reset(pict)->ref();
  32         this->CopyString(&fWritePath, writePath);
  33         this->CopyString(&fMismatchPath, mismatchPath);
  34         this->CopyString(&fInputFilename, inputFilename);
  35         fUseChecksumBasedFilenames = useChecksumBasedFilenames;
  36         this->buildBBoxHierarchy();
  37         // In order to avoid allocating a large canvas (particularly important for GPU), create one
  38         // canvas that is a multiple of the tile size, and draw portions of the picture.
  39         fLargeTileWidth = fXTilesPerLargeTile * this->getTileWidth();
  40         fLargeTileHeight = fYTilesPerLargeTile * this->getTileHeight();
  41         fCanvas.reset(this->INHERITED::setupCanvas(fLargeTileWidth, fLargeTileHeight));
  42     }
  43
  44     bool CopyTilesRenderer::render(SkBitmap** out) {
  45         int i = 0;
  46         bool success = true;
  47         SkBitmap dst;
  48         for (int x = 0; x < this->getViewWidth(); x += fLargeTileWidth) {
  49             for (int y = 0; y < this->getViewHeight(); y += fLargeTileHeight) {
  50                 SkAutoCanvasRestore autoRestore(fCanvas, true);
  51                 // Translate so that we draw the correct portion of the picture.
  52                 // Perform a postTranslate so that the scaleFactor does not interfere with the
  53                 // positioning.
  54                 SkMatrix mat(fCanvas->getTotalMatrix());
  55                 mat.postTranslate(SkIntToScalar(-x), SkIntToScalar(-y));
  56                 fCanvas->setMatrix(mat);
  57                 // Draw the picture
  58                 fCanvas->drawPicture(fPicture);
  59                 // Now extract the picture into tiles
  60                 SkBitmap baseBitmap;
  61                 fCanvas->readPixels(SkIRect::MakeSize(fCanvas->getBaseLayerSize()), &baseBitmap);
  62                 SkIRect subset;
  63                 for (int tileY = 0; tileY < fLargeTileHeight; tileY += this->getTileHeight()) {
  64                     for (int tileX = 0; tileX < fLargeTileWidth; tileX += this->getTileWidth()) {
  65                         subset.set(tileX, tileY, tileX + this->getTileWidth(),
  66                                    tileY + this->getTileHeight());
  67                         SkDEBUGCODE(bool extracted =)
  68                         baseBitmap.extractSubset(&dst, subset);
  69                         SkASSERT(extracted);
  70                         if (!fWritePath.isEmpty()) {
  71                             // Similar to write() in PictureRenderer.cpp, but just encodes
  72                             // a bitmap directly.
  73                             // TODO: Share more common code with write() to do this, to properly
  74                             // write out the JSON summary, etc.
  75                             SkString pathWithNumber = SkOSPath::Join(fWritePath.c_str(),
  76                                                                      fInputFilename.c_str());
  77                             pathWithNumber.remove(pathWithNumber.size() - 4, 4);
  78                             pathWithNumber.appendf("%i.png", i++);
  79                             SkBitmap copy;
  80 #if SK_SUPPORT_GPU
  81                             if (isUsingGpuDevice()) {
  82                                 dst.pixelRef()->readPixels(&copy, &subset);
  83                             } else {
  84 #endif
  85                                 dst.copyTo(&copy);
  86 #if SK_SUPPORT_GPU
  87                             }
  88 #endif
  89                             success &= SkImageEncoder::EncodeFile(pathWithNumber.c_str(), copy,
  90                                                                   SkImageEncoder::kPNG_Type, 100);
  91                         }
  92                     }
  93                 }
  94             }
  95         }
  96         return success;
  97     }
  98
  99     SkString CopyTilesRenderer::getConfigNameInternal() {
 100         return SkString("copy_tiles");
 101     }
 102 }