Use make_shared<>.

[dcpomatic.git] / src / lib / image.cc

diff --git a/src/lib/image.cc b/src/lib/image.cc
index 92b850a62bce981e373cce86d199e25367fbfbad..1107f0a4077964ef07b67e221ade50d98f9b0fcb 100644 (file)
--- a/src/lib/image.cc
+++ b/src/lib/image.cc
@@ -1,19 +1,20 @@
 /*
     Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
-    This program is distributed in the hope that it will be useful,
+    DCP-o-matic is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
@@ -26,7 +27,6 @@
 #include "timer.h"
 #include "rect.h"
 #include "util.h"
-#include "md5_digester.h"
 #include "dcpomatic_socket.h"
 extern "C" {
 #include <libswscale/swscale.h>
@@ -34,6 +34,7 @@ extern "C" {
 #include <libavutil/pixdesc.h>
 #include <libavutil/frame.h>
 }
+#include <boost/make_shared.hpp>
 #include <iostream>
 
 #include "i18n.h"
@@ -45,6 +46,7 @@ using std::cerr;
 using std::list;
 using std::runtime_error;
 using boost::shared_ptr;
+using boost::make_shared;
 using dcp::Size;
 
 int
@@ -149,7 +151,7 @@ Image::crop_scale_window (
           To get around this, we ask Image to overallocate its buffers by the overrun.
        */
 
-       shared_ptr<Image> out (new Image (out_format, out_size, out_aligned, (out_size.width - inter_size.width) / 2));
+       shared_ptr<Image> out = make_shared<Image> (out_format, out_size, out_aligned, (out_size.width - inter_size.width) / 2);
        out->make_black ();
 
        /* Size of the image after any crop */
@@ -227,7 +229,7 @@ Image::scale (dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_fo
        */
        DCPOMATIC_ASSERT (aligned ());
 
-       shared_ptr<Image> scaled (new Image (out_format, out_size, out_aligned));
+       shared_ptr<Image> scaled = make_shared<Image> (out_format, out_size, out_aligned);
 
        struct SwsContext* scale_context = sws_getContext (
                size().width, size().height, pixel_format(),
@@ -425,6 +427,7 @@ Image::make_transparent ()
 void
 Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
 {
+       /* We're blending RGBA images; first byte is blue, second byte is green, third byte blue, fourth byte alpha */
        DCPOMATIC_ASSERT (other->pixel_format() == AV_PIX_FMT_RGBA);
        int const other_bpp = 4;
 
@@ -447,15 +450,16 @@ Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
        switch (_pixel_format) {
        case AV_PIX_FMT_RGB24:
        {
+               /* Going onto RGB24.  First byte is red, second green, third blue */
                int const this_bpp = 3;
                for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
                        uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
                        uint8_t* op = other->data()[0] + oy * other->stride()[0];
                        for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
                                float const alpha = float (op[3]) / 255;
-                               tp[0] = op[0] * alpha + tp[0] * (1 - alpha);
+                               tp[0] = op[2] * alpha + tp[0] * (1 - alpha);
                                tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
-                               tp[2] = op[2] * alpha + tp[2] * (1 - alpha);
+                               tp[2] = op[0] * alpha + tp[2] * (1 - alpha);
 
                                tp += this_bpp;
                                op += other_bpp;
@@ -817,7 +821,7 @@ merge (list<PositionImage> images)
                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));
+       shared_ptr<Image> merged = make_shared<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 - all.position());