#include <OpenEXR/ImfCRgbaFile.h>

#define WIDTH  256
#define HEIGHT 300

ImfRgba pixels[WIDTH * HEIGHT];

int
main(int argc, char **argv)
{
	int i;
	int xmin, ymin, xmax, ymax;
	int width = WIDTH;
	int height = HEIGHT;
	float val;

	const ImfHeader *header;
	ImfInputFile *fp = NULL;

	fp = ImfOpenInputFile("test.exr");
	if (!fp) {
		printf("can't open file\n");
		exit(-1);
	}

	header = ImfInputHeader((const ImfInputFile *)fp);
	printf("channels = %d\n", ImfInputChannels(fp));
	printf("channels = %d\n", ImfInputChannels(fp));

	ImfHeaderDataWindow(header, &xmin, &ymin, &xmax, &ymax);

	printf("data = %d, %d, %d, %d\n", xmin, ymin, xmax, ymax);

	ImfInputSetFrameBuffer(fp, pixels, 1, width);
	ImfInputReadPixels(fp, ymin, ymax);

	val = ImfHalfToFloat(pixels[0].r);
	printf("r = %f\n", val);
	val = ImfHalfToFloat(pixels[0].g);
	printf("g = %f\n", val);
	val = ImfHalfToFloat(pixels[0].b);
	printf("b = %f\n", val);
	val = ImfHalfToFloat(pixels[0].a);
	printf("a = %f\n", val);

	ImfCloseInputFile(fp);
}

<h1>Software error:</h1>
<pre>Permission denied at plugin/attach/AttachHandler.pm line 172.
</pre>
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