RectanizerPow2.cpp

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/*
 * Copyright 2010 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#include "src/gpu/RectanizerPow2.h"
 
namespace skgpu {
 
bool RectanizerPow2::addRect(int width, int height, SkIPoint16* loc) {
    if ((unsigned)width > (unsigned)this->width() ||
        (unsigned)height > (unsigned)this->height()) {
        return false;
    }
 
    int32_t area = width * height; // computed here since height will be modified
 
    height = GrNextPow2(height);
    if (height < kMIN_HEIGHT_POW2) {
        height = kMIN_HEIGHT_POW2;
    }
 
    Row* row = &fRows[HeightToRowIndex(height)];
    SkASSERT(row->fRowHeight == 0 || row->fRowHeight == height);
 
    if (0 == row->fRowHeight) {
        if (!this->canAddStrip(height)) {
            return false;
        }
        this->initRow(row, height);
    } else {
        if (!row->canAddWidth(width, this->width())) {
            if (!this->canAddStrip(height)) {
                return false;
            }
            // that row is now "full", so retarget our Row record for
            // another one
            this->initRow(row, height);
        }
    }
 
    SkASSERT(row->fRowHeight == height);
    SkASSERT(row->canAddWidth(width, this->width()));
    *loc = row->fLoc;
    row->fLoc.fX += width;
 
    SkASSERT(row->fLoc.fX <= this->width());
    SkASSERT(row->fLoc.fY <= this->height());
    SkASSERT(fNextStripY <= this->height());
    fAreaSoFar += area;
    return true;
}
 
///////////////////////////////////////////////////////////////////////////////
 
// factory is now in RectanizerSkyline.cpp
//Rectanizer* Rectanizer::Factory(int width, int height) {
//    return new RectanizerPow2(width, height);
//}
 
}  // End of namespace skgpu