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#ifndef ROTOR_CVIMAGE
#define ROTOR_CVIMAGE
#include <math.h>
#include <cv.h>
#include <highgui.h>
#include <unordered_map>
//converting to use a cv image...
//cv::Mat supports most of what we want here
//need to think
//http://answers.opencv.org/question/8202/using-external-image-data-in-a-cvmat/
//all access to the image is presently through a pointer to the data
//cv::Mat supports this
//how will copying work?
//Rotor::Image will contain a cv::Mat object which may own its data or inherit it
//cv::Mat should take care of reference counting
//can cv::Mat
namespace Rotor {
class pixeltables{
//handy pixel arithmetic lookup tables as nested arrays
//so - pixels.add[0x78][0x66]; will give the precalculated result of adding with saturation
// pixels.mono_weights[0][0x100]; will give the red component to convert to mono
public:
pixeltables(){
add=new uint8_t*[256];
multiply=new uint8_t*[256];
overlay=new uint8_t*[256];
for (int i=0;i<256;i++){
add[i]=new uint8_t[256];
multiply[i]=new uint8_t[256];
overlay[i]=new uint8_t[256];
for (int j=0;j<256;j++){
add[i][j]=(uint8_t)std::min(i+j,0xFF);
multiply[i][j]=(uint8_t)(((float)i)*(((float)j)/255.0f));
overlay[i][j]=j<128?(uint8_t)((i*j)>>7):255-(((0xFF-i)*(0xFF-j))>>7);
}
}
mono_weights=new uint8_t*[3];
float weights[3]={0.2989, 0.5870, 0.1140};
for (int i=0;i<3;i++) {
mono_weights[i]=new uint8_t[256];
for (int j=0;j<256;j++){
mono_weights[i][j]=(uint8_t)(((float)j)*weights[i]);
}
}
}
virtual ~pixeltables(){
for (int i=0;i<256;i++){
delete[] add[i];
delete[] multiply[i];
delete[] overlay[i];
}
delete[] add;
delete[] multiply;
delete[] overlay;
for (int i=0;i<3;i++) {
delete[] mono_weights[i];
}
delete[] mono_weights;
}
uint8_t **add;
uint8_t **multiply;
uint8_t **overlay;
uint8_t **mono_weights;
};
static pixeltables pixels;
class Image{
public:
Image(){
zero();
};
Image(int _w,int _h){
zero();
setup(_w,_h);
};
~Image() {
free();
};
void free(){
if (RGBdata&&ownsRGBdata) delete[] RGBdata;
if (Adata&&ownsAdata) delete[] Adata;
if (Zdata&&ownsZdata) delete[] Zdata;
rgb.release();
alpha.release();
zero();
}
void zero(){
RGBdata=nullptr;
Adata=nullptr;
Zdata=nullptr;
w=0;
h=0;
ownsRGBdata=ownsAdata=ownsZdata=false;
}
//space out to 32 bit RGB padding for cairo
void convert24();
void convert32();
int getStride(){
return w*3;
}
bool clear(){
rgb.setTo(0);
return true;
};
bool setup(int _w,int _h){ //set up with internal data
if ((w!=_w)|(h!=_h)){
free();
rgb.create(_h,_w,CV_8UC3);
RGBdata=rgb.data; //can move to use the bare pointer eventually
ownsRGBdata=false; //will not be necessary
w=_w;
h=_h;
}
return true;
/*
if (w!=_w||h!=_h||!ownsRGBdata||!ownsAdata||!ownsZdata){
free();
w=_w;
h=_h;
RGBdata=new uint8_t[w*h*3];
Adata=new uint8_t[w*h];
Zdata=new uint16_t[w*h];
ownsRGBdata=ownsAdata=ownsZdata=true;
return true;
}
else return false;
*/
}
bool read_file(std::string &filename){
rgb=cv::imread(filename,CV_LOAD_IMAGE_COLOR);
if (rgb.empty()) return false;
RGBdata=rgb.data;
ownsRGBdata=false;
w=rgb.rows;
h=rgb.cols;
return true;
}
bool setup_fromRGB(int _w,int _h,uint8_t *pRGBdata,int linepadding=0){
//here the data belongs to libavcodec or other
//could move to using cv::Mat there also and just passing cv:Mat over
//linepadding causes crash, but it doesn't seem to be necessary
// Mat::Mat(int rows, int cols, int type, void* data, size_t step=AUTO_STEP)
rgb=cv::Mat(_h,_w,CV_8UC3,pRGBdata,(_w*3)+linepadding);
//std::cerr<<"created cv::Mat with step= "<<rgb.step<<",should be "<<((_w*3)+linepadding)<<std::endl;
RGBdata=rgb.data; //can move to use the bare pointer eventually
ownsRGBdata=false; //will not be necessary
w=_w;
h=_h;
return true;
/*
if (w!=_w||h!=_h||ownsRGBdata||!ownsAdata||!ownsZdata){
free();
w=_w;
h=_h;
RGBdata=pRGBdata;
Adata=new uint8_t[w*h];
Zdata=new uint16_t[w*h];
ownsRGBdata=false;
ownsAdata=ownsZdata=true;
return true;
}
return false;
*/
}
bool setup_fromMat(cv::Mat& othermat){
//here the mat belongs to another object
if (othermat.channels()==1) {
cv::cvtColor(othermat, rgb, CV_GRAY2RGB);
}
else rgb=othermat;
RGBdata=rgb.data; //can move to use the bare pointer eventually
ownsRGBdata=false; //will not be necessary
w=rgb.rows;
h=rgb.cols;
return true;
}
Image* clone(){
Image *t=new Image();
t->rgb=rgb.clone();
t->w=w;
t->h=h;
t->RGBdata=t->rgb.data; //can move to use the bare pointer eventually
t->ownsRGBdata=false; //always just deallocate cv::Mat from stack
/*
for (int i=0;i<w*h*3;i++) {
t->RGBdata[i]=RGBdata[i];
}
*/
return t;
}
Image & operator=(const Image &other);
//believe these still work, don't know if these optimisations are better than opencvs..
Image & operator+=(const Image &other);
Image & operator*=(const Image &other);
Image & operator^=(const Image &other);
Image & alpha_blend(const Image &other);
Image & alpha_blend_cv(const Image &other);
Image & alpha_merge(const Image &other);
Image & alpha_from_cv(cv::Mat &other);
Image & add_wrap(const Image &other);
Image & divide_wrap(const Image &other);
Image & overlay(const Image &other);
Image & operator*=(const float &amount);
Image & operator+=(const float &amount);
Image & operator-=(const float &amount);
Image & operator/=(const float &amount);
Image * operator*(const float &amount);
Image * operator+(const float &amount);
Image * operator-(const float &amount);
Image * operator/(const float &amount);
uint8_t *RGBdata;
uint8_t *Adata;
uint16_t *Zdata;
int h,w;
bool ownsRGBdata,ownsAdata,ownsZdata; //better done through auto_ptr?
//making the interface for mip mapping
//should reduce in powers of 2
//
cv::Mat rgb;
cv::Mat alpha;
//store a library of mipmaps
std::unordered_map<int,cv::Mat> mipmaps;
cv::Mat& get_mipmap(int level);
};
}
#endif
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