submodule/skia/src/gpu/RectanizerPow2.cpp

   1 /*
   2  * Copyright 2010 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 "src/gpu/RectanizerPow2.h"
   9
  10 namespace skgpu {
  11
  12 bool RectanizerPow2::addRect(int width, int height, SkIPoint16* loc) {
  13     if ((unsigned)width > (unsigned)this->width() ||
  14         (unsigned)height > (unsigned)this->height()) {
  15         return false;
  16     }
  17
  18     int32_t area = width * height; // computed here since height will be modified
  19
  20     height = GrNextPow2(height);
  21     if (height < kMIN_HEIGHT_POW2) {
  22         height = kMIN_HEIGHT_POW2;
  23     }
  24
  25     Row* row = &fRows[HeightToRowIndex(height)];
  26     SkASSERT(row->fRowHeight == 0 || row->fRowHeight == height);
  27
  28     if (0 == row->fRowHeight) {
  29         if (!this->canAddStrip(height)) {
  30             return false;
  31         }
  32         this->initRow(row, height);
  33     } else {
  34         if (!row->canAddWidth(width, this->width())) {
  35             if (!this->canAddStrip(height)) {
  36                 return false;
  37             }
  38             // that row is now "full", so retarget our Row record for
  39             // another one
  40             this->initRow(row, height);
  41         }
  42     }
  43
  44     SkASSERT(row->fRowHeight == height);
  45     SkASSERT(row->canAddWidth(width, this->width()));
  46     *loc = row->fLoc;
  47     row->fLoc.fX += width;
  48
  49     SkASSERT(row->fLoc.fX <= this->width());
  50     SkASSERT(row->fLoc.fY <= this->height());
  51     SkASSERT(fNextStripY <= this->height());
  52     fAreaSoFar += area;
  53     return true;
  54 }
  55
  56 ///////////////////////////////////////////////////////////////////////////////
  57
  58 // factory is now in RectanizerSkyline.cpp
  59 //Rectanizer* Rectanizer::Factory(int width, int height) {
  60 //    return new RectanizerPow2(width, height);
  61 //}
  62
  63 }  // End of namespace skgpu