Magick Wand API example

main.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <wand/magick_wand.h>

void read_file(char** contents, int* length) {
	int size;
	FILE *input_file = fopen("Eduardo.png", "rb");
	fseek(input_file, 0, SEEK_END);
	size = ftell(input_file);
	rewind(input_file);
	*contents = malloc(size * sizeof(char));
	fread(*contents, sizeof(char), size, input_file);
	fclose(input_file);
}

int main(int argc,char **argv) {
	MagickWand *magick_wand;
	MagickPassFail status = MagickPass;
	const char *infile, *outfile;
	char* contents;
	int length;

	read_file(&contents, &length);
	if (argc != 3) {
		fprintf(stderr,"Usage: %s: infile outfile\n",argv[0]);
		return 1;
	}

	infile=argv[1];
	outfile=argv[2];

	// Initialize GraphicsMagick API
	InitializeMagick(*argv);

	// Allocate Wand handle
	magick_wand=NewMagickWand();

	// Read input image file
	if (status == MagickPass) {
		//status = MagickReadImage(magick_wand,infile);
		status = MagickReadImageBlob(magick_wand, contents, length);
	}

	// Rotate image clockwise 30 degrees with black background
	if (status == MagickPass) {
		PixelWand *background;
		background=NewPixelWand();
		PixelSetColor(background,"#000000");
		status = MagickRotateImage(magick_wand,background,30);
		DestroyPixelWand(background);
	}

	// Write output file
	if (status == MagickPass) {
		status = MagickWriteImage(magick_wand,outfile);
	}

	// Diagnose any error
	if (status != MagickPass) {
		char *description;
		ExceptionType severity;

		description=MagickGetException(magick_wand,&severity);
		(void) fprintf(stderr,"%.1024s (severity %d)\n", description,severity);
	}

	// Release Wand handle
	DestroyMagickWand(magick_wand);

	// Destroy GraphicsMagick API
	DestroyMagick();

	return (status == MagickPass ? 0 : 1);
}