In my application, I create an image and then write it. I'm having trouble defining the output type (grayscale) and depth (8 bit).
The saved image contains the data I expect, but it is always RGB and uses 16 bit per channel.
Here is a small example of what I'm doing:
Code: Select all
#include <wand/MagickWand.h>
int main(int argc, char *argv[]) {
unsigned long w = 120, h = 120;
MagickWandGenesis();
MagickWand *magick_wand = NewMagickWand();
PixelWand *magick_pixel_wand = NewPixelWand();
PixelSetColor(magick_pixel_wand, "none");
MagickNewImage(magick_wand, w, h, magick_pixel_wand);
MagickSetImageType(magick_wand, GrayscaleType);
MagickSetImageChannelDepth(magick_wand, AllChannels, 8);
MagickSetImageDepth(magick_wand, 8);
PixelIterator *magick_it = NewPixelIterator(magick_wand);
for (unsigned long y = 0; y < h; y++) {
PixelWand **magick_pixels = PixelGetNextIteratorRow(magick_it, &w);
for (unsigned long x = 0; x < w; x++) {
PixelSetRed(magick_pixels[x], static_cast<float>(x + y) / 255.0f);
PixelSetGreen(magick_pixels[x], static_cast<float>(x + y) / 255.0f);
PixelSetBlue(magick_pixels[x], static_cast<float>(x + y) / 255.0f);
}
(void)PixelSyncIterator(magick_it);
}
MagickWriteImage(magick_wand, "out.png");
magick_wand = DestroyMagickWand(magick_wand);
magick_it = DestroyPixelIterator(magick_it);
MagickWandTerminus();
return 0;
}