QVision: Qt's Image, Video and Computer Vision Library

00001 /*
00002  *      Copyright (C) 2011, 2012. PARP Research Group.
00003  *      <http://perception.inf.um.es>
00004  *      University of Murcia, Spain.
00005  *
00006  *      This file is part of the QVision library.
00007  *
00008  *      QVision is free software: you can redistribute it and/or modify
00009  *      it under the terms of the GNU Lesser General Public License as
00010  *      published by the Free Software Foundation, version 3 of the License.
00011  *
00012  *      QVision is distributed in the hope that it will be useful,
00013  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  *      GNU Lesser General Public License for more details.
00016  *
00017  *      You should have received a copy of the GNU Lesser General Public
00018  *      License along with QVision. If not, see <http://www.gnu.org/licenses/>.
00019  */
00020 
00024 
00025 #include <QVPyramid>
00026 
00027 QVPyramid::QVPyramid(){}
00028 
00029 QVPyramid::QVPyramid(int width, int height, int nLevels){
00030 
00031     this->width = width;
00032     this->height = height;
00033 
00034     this->pyr = new PyramidWithDerivativesCreator ();
00035 
00036     //Allocate GPU memory:
00037     this->pyr->allocate(width, height, nLevels);
00038 
00039     //Allocate CPU memory:
00040     this->pyr_images = new QVImage<sFloat,1> [nLevels];
00041 }
00042 
00043 void QVPyramid::buildPyramid(const QVImage<uChar, 1> &image) {
00044     this->pyr->buildPyramidForGrayscaleImage(image.getReadData());
00045 }
00046 
00047 void QVPyramid::getFromGPU() {
00048     int textureWidth, textureHeight;
00049 
00050     for (int i=0; i < this->pyr->numberOfLevels(); i++){
00051         this->pyr_images[i] = QVImage<sFloat,1> (width >> i, height >> i);
00052         //Activa el nivel i de la pirámide
00053         this->pyr->activateTarget(i);
00054         //Se lee del buffer OpenGL
00055         glReadPixels(0,0, width >> i, height >> i, GL_RED, GL_FLOAT, pyr_images[i].getWriteData());
00056     }
00057 }
00058 
00059 QVImage<sFloat,1> QVPyramid::getImage(int level) const{
00060     return this->pyr_images[level];
00061 }
00062 
00063 QVPyramid::~QVPyramid(){
00064     this->pyr->deallocate();
00065 }
00066 
00067 unsigned int QVPyramid::getID() const{
00068     return this->pyr->textureID();
00069 }
00070 
00071 int QVPyramid::getWidth () const{
00072     return this->width;
00073 }
00074 
00075 int QVPyramid::getHeight() const{
00076     return this->height;
00077 }
src/qvgpukltflow/qvpyramid.cpp
