Hi,
I'm trying to resize the image in using GraphicsMagick and Wt.
(same as: $ gm convert -geometry "400x300>" in.png out.jpg)
---------- resize.cpp - this code work correctly (but not in Wt)
#include <Magick++.h>
int main(int argc, char **argv) {
Magick::Image image;
image.read(argv[1]);
image.zoom(Magick::Geometry("400x300>"));
image.write(argv[2]);
}
//compile: $ g++ -o resize resize.cpp -I/usr/include/GraphicsMagick
-lMagick++
//or compile: $ g++ -o resize resize.cpp `Magick++-config --cppflags
--cxxflags --ldflags --libs`
//run: $ ./resize in.jpg out.jpg
----------
I tried using the Magick++ in Wt, it compiles but gives error when open
the site.
My Wt site:
----- CMakeLists.txt
include_directories(${Wt_INCLUDE_DIR} ${Boost_INCLUDE_DIRS}
/usr/include/GraphicsMagick)
add_executable(test.wt test.cpp)
target_link_libraries(test.wt wt wthttp Magick++ ${Boost_LIBRARIES})
# `Magick++-config --cppflags --cxxflags --ldflags --libs`
----- Test.cpp
#include <Magick++.h>
...
Magick::Image image; //error: Segmentation fault
or
Magick::Image *image = new Magick::Image(); //error: Segmentation fault
or
Magick::Image image(); //ok
image.read("in.jpg"); //error: request for member ‘read’ in ‘image’,
which is of non-class type ‘Magick::Image()’
---------- resize1.cpp - this code work correctly too (but no in Wt)
#include <cstring>
#include <magick/api.h>
int main(int argc, char **argv) {
Image *image;
ImageInfo *image_info;
ExceptionInfo exception;
InitializeMagick(*argv);
GetExceptionInfo(&exception);
image_info = CloneImageInfo((ImageInfo *) NULL);
(void) strcpy(image_info->filename, argv[1]);
image = ReadImage(image_info, &exception);
image = ResizeImage(image, 400, 300, LanczosFilter, 1.0, &exception);
(void) strcpy(image->filename, argv[2]);
WriteImage(image_info, image);
DestroyImage(image);
DestroyImageInfo(image_info);
DestroyExceptionInfo(&exception);
DestroyMagick();
}
//compile: $ g++ -o resize1 resize1.cpp -O `GraphicsMagick-config
--cppflags --ldflags --libs`
//run: $ ./resize1 in.jpg out1.jpg
----------
Can anyone tell me where I am wrong?
Thanks.
John
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