I'm just starting with ImageMagick so this question might sound a bit newbie like but I just can figure out what the problem is.
I tried geting a pixel_cache, iterating over pixels in there and modifying them to some color but the result I get is always some color with some pattern. The code I used was
And the output I get can be seen here (https://docs.google.com/file/d/0B6m4Eln ... 1oX2s/edit). If you pay attention you will notice the sripes where the green square should be.
Code: Select all
const std::string image_url = "wizard.jpg"; Image image(image_url); // Ensure that there is only one reference to underlying image // If this is not done, then image pixels will not be modified. image.type(TrueColorType); image.modifyImage(); // Allocate pixel view Pixels view(image); size_t columns = 115; size_t rows =115; Color green("green"); PixelPacket *pixels = view.get(10,10,10+columns,10+rows); for ( ssize_t row = 0; row < rows ; ++row ) for ( ssize_t column = 0; column < columns ; ++column ) *pixels++=(PixelPacket) green; // Save changes to image. view.sync(); image.write("wizardout.jpg");
Any help would be appreciated...