#include <libswscale/swscale.h>
#include <libavutil/pixfmt.h>
#include <libavutil/pixdesc.h>
-#include <libpostproc/postprocess.h>
}
#include "image.h"
#include "exceptions.h"
#include "scaler.h"
#include "timer.h"
+#include "rect.h"
+#include "md5_digester.h"
#include "i18n.h"
using std::min;
using std::cout;
using std::cerr;
+using std::list;
+using std::stringstream;
using boost::shared_ptr;
using dcp::Size;
}
}
+void
+Image::make_transparent ()
+{
+ if (_pixel_format != PIX_FMT_RGBA) {
+ throw PixelFormatError ("make_transparent()", _pixel_format);
+ }
+
+ memset (data()[0], 0, lines(0) * stride()[0]);
+}
+
void
Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
{
OS X crashes on this illegal read, though other operating systems don't
seem to mind. The nasty + 1 in this malloc makes sure there is always a byte
for that instruction to read safely.
+
+ Further to the above, valgrind is now telling me that ff_rgb24ToY_ssse3
+ over-reads by more then _avx. I can't follow the code to work out how much,
+ so I'll just over-allocate by 32 bytes and have done with it. Empirical
+ testing suggests that it works.
*/
- _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * lines (i) + 1);
+ _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * lines (i) + 32);
}
}
return _aligned;
}
+PositionImage
+merge (list<PositionImage> images)
+{
+ if (images.empty ()) {
+ return PositionImage ();
+ }
+
+ dcpomatic::Rect<int> all (images.front().position, images.front().image->size().width, images.front().image->size().height);
+ for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
+ all.extend (dcpomatic::Rect<int> (i->position, i->image->size().width, i->image->size().height));
+ }
+
+ shared_ptr<Image> merged (new Image (images.front().image->pixel_format (), dcp::Size (all.width, all.height), true));
+ merged->make_transparent ();
+ for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
+ merged->alpha_blend (i->image, i->position);
+ }
+
+ return PositionImage (merged, all.position ());
+}
+
+string
+Image::digest () const
+{
+ MD5Digester digester;
+
+ for (int i = 0; i < components(); ++i) {
+ digester.add (data()[i], line_size()[i]);
+ }
+
+ return digester.get ();
+}