Sha256: de52271e674e207fabc50e2b336098aa65bfc5cb541a6a25102b92ee796c4858
Contents?: true
Size: 996 Bytes
Versions: 11
Compression:
Stored size: 996 Bytes
Contents
#include "psd_native_ext.h"
VALUE psd_native_combine_greyscale_channel(VALUE self) {
psd_logger("debug", "Beginning greyscale processing");
uint32_t channel_count = FIX2UINT(rb_funcall(self, rb_intern("channels"), 0));
uint32_t num_pixels = FIX2UINT(rb_iv_get(self, "@num_pixels"));
uint32_t pixel_step = FIX2UINT(rb_funcall(self, rb_intern("pixel_step"), 0));
VALUE* channel_data = RARRAY_PTR(rb_iv_get(self, "@channel_data"));
uint32_t channel_length = FIX2UINT(rb_iv_get(self, "@channel_length"));
uint32_t i, alpha, grey;
for (i = 0; i < num_pixels; i += pixel_step) {
if (channel_count == 2) {
grey = FIX2UINT(channel_data[i]);
alpha = FIX2UINT(channel_data[channel_length + i]);
rb_ary_push(rb_iv_get(self, "@pixel_data"), INT2FIX(BUILD_PIXEL(grey, grey, grey, alpha)));
} else {
grey = FIX2UINT(channel_data[i]);
rb_ary_push(rb_iv_get(self, "@pixel_data"), INT2FIX(BUILD_PIXEL(grey, grey, grey, 255)));
}
}
return Qnil;
}
Version data entries
11 entries across 11 versions & 2 rubygems