As there has been a fix using size_t in ofPixels just recently, I am facing issues with code that worked well on 0.9.4 windows10:
Exception thrown at 0x00000001403EBD4C in example3J-test1_debug.exe: 0xC0000005: Access violation reading location 0x000000000FD5F0D3.
it is in getColor(x,y) where x and y are well inside their bounds and the image was loaded before.
is this a known behaviour?
the debugger breaks at
template<typename PixelType>
ofColor_<PixelType> ofPixels_<PixelType>::Pixel::getColor() const{
ofColor_<PixelType> c;
switch(pixelFormat){
case OF_PIXELS_RGB:
c.set( pixel[0], pixel[1], pixel[2] );
break;
case OF_PIXELS_BGR:
c.set( pixel[2], pixel[1], pixel[0] );
break;
case OF_PIXELS_RGBA:
c.set( pixel[0], pixel[1], pixel[2], pixel[3] ); // <<-----
i wrote a small program and can replicate this behaviour. let me know and i will send you the src-code.
bakercp
#4
We are discussing this over here – can you paste your example:
https://github.com/openframeworks/openFrameworks/issues/5321
straight forward. the image is a simple png with transparency:
#include "ofApp.h"
#include "assert.h"
ofImage image;
//--------------------------------------------------------------
void ofApp::setup(){
bool b = image.load("test.png");
assert(b);
float x, y;
ofColor color;
for (size_t i = 0; i < 200000; i++)
{
do
{
x = floor(ofRandom(image.getWidth()));
y = floor(ofRandom(image.getHeight()));
// not necessary, just to make sure
x = ofClamp(x, 0, image.getWidth() - 1);
y = ofClamp(x, 0, image.getHeight() - 1);
//ofLogNotice("setup") << "xy: " << x << " " << y;
color = image.getColor(x, y);
} while (color.a < 20);
if (!(i % 100)) cout << ".";
}
cout << endl;
}
//--------------------------------------------------------------
void ofApp::update(){
}
//--------------------------------------------------------------
void ofApp::draw(){
ofPushMatrix();
ofScale(0.1, 0.1);
image.draw(0,0);
ofPopMatrix();
}
//--------------------------------------------------------------
