Page 1 of 1
C++ Read Png into opengl
Posted: 2015-06-09T14:55:57-07:00
by joessu
Very simple thing.
I am getting an odd result.
Code: Select all
Magick::Image im;
im.magick("PNG");
im.read(std::string(TEXTURE_DIRECTORY).append(desc.filename)); //"image.png"
w = im.columns();
h = im.rows();
unsigned char* data = new unsigned char[w*h*3];
im.write(0,0,w,h,"RGB", CharPixel, data);
tex.widths.push_back(w);
tex.heights.push_back(h);
tex.texData.push_back(data);
Here is the result in OGL:
looks like the format remains PNG? what am i missing?
Re: C++ Read Png into opengl
Posted: 2015-06-09T15:06:26-07:00
by magick
Perhaps the image has an alpha channel. Try w*h*4 and RGBA.
Re: C++ Read Png into opengl
Posted: 2015-06-09T15:12:50-07:00
by joessu
Ah, i thought that by declaring RGB in write that i could exclude the alpha channel?
EDIT: that didn't do it. the result is different but has same artifacts.
Re: C++ Read Png into opengl
Posted: 2015-06-10T09:35:49-07:00
by joessu
When i write it to a png using im.write("test.png"), It writes it perfectly!!!
Re: C++ Read Png into opengl
Posted: 2015-06-10T09:38:38-07:00
by joessu
Sorry for spamming, another bit of info. I know my texture code in opengl works because i was using SOIL to do the same exact thing before this
Re: C++ Read Png into opengl
Posted: 2015-06-11T13:48:39-07:00
by joessu
So the issue appears to be in my use of the pixel data after this function exits.