michael@0: /* vim:set ts=2 sw=2 sts=2 cin et: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include <QIcon>
michael@0: 
michael@0: #include <stdlib.h>
michael@0: #include <unistd.h>
michael@0: 
michael@0: #include "mozilla/Endian.h"
michael@0: 
michael@0: #include "nsMimeTypes.h"
michael@0: #include "nsIMIMEService.h"
michael@0: 
michael@0: #include "nsIStringBundle.h"
michael@0: 
michael@0: #include "nsNetUtil.h"
michael@0: #include "nsIURL.h"
michael@0: 
michael@0: #include "nsIconChannel.h"
michael@0: #include "nsGtkQtIconsConverter.h"
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsIconChannel,
michael@0:                   nsIRequest,
michael@0:                   nsIChannel)
michael@0: 
michael@0: static nsresult
michael@0: moz_qicon_to_channel(QImage *image, nsIURI *aURI,
michael@0:                      nsIChannel **aChannel)
michael@0: {
michael@0:   NS_ENSURE_ARG_POINTER(image);
michael@0: 
michael@0:   int width = image->width();
michael@0:   int height = image->height();
michael@0: 
michael@0:   NS_ENSURE_TRUE(height < 256 && width < 256 && height > 0 && width > 0,
michael@0:                  NS_ERROR_UNEXPECTED);
michael@0: 
michael@0:   const int n_channels = 4;
michael@0:   long int buf_size = 2 + n_channels * height * width;
michael@0:   uint8_t * const buf = (uint8_t*)NS_Alloc(buf_size);
michael@0:   NS_ENSURE_TRUE(buf, NS_ERROR_OUT_OF_MEMORY);
michael@0:   uint8_t *out = buf;
michael@0: 
michael@0:   *(out++) = width;
michael@0:   *(out++) = height;
michael@0: 
michael@0:   const uchar * const pixels = image->bits();
michael@0:   int rowextra = image->bytesPerLine() - width * n_channels;
michael@0: 
michael@0:   // encode the RGB data and the A data
michael@0:   const uchar * in = pixels;
michael@0:   for (int y = 0; y < height; ++y, in += rowextra) {
michael@0:     for (int x = 0; x < width; ++x) {
michael@0:       uint8_t r = *(in++);
michael@0:       uint8_t g = *(in++);
michael@0:       uint8_t b = *(in++);
michael@0:       uint8_t a = *(in++);
michael@0: #define DO_PREMULTIPLY(c_) uint8_t(uint16_t(c_) * uint16_t(a) / uint16_t(255))
michael@0: #if MOZ_LITTLE_ENDIAN
michael@0:       *(out++) = DO_PREMULTIPLY(b);
michael@0:       *(out++) = DO_PREMULTIPLY(g);
michael@0:       *(out++) = DO_PREMULTIPLY(r);
michael@0:       *(out++) = a;
michael@0: #else
michael@0:       *(out++) = a;
michael@0:       *(out++) = DO_PREMULTIPLY(r);
michael@0:       *(out++) = DO_PREMULTIPLY(g);
michael@0:       *(out++) = DO_PREMULTIPLY(b);
michael@0: #endif
michael@0: #undef DO_PREMULTIPLY
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   NS_ASSERTION(out == buf + buf_size, "size miscalculation");
michael@0: 
michael@0:   nsresult rv;
michael@0:   nsCOMPtr<nsIStringInputStream> stream =
michael@0:     do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv);
michael@0:   NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:   rv = stream->AdoptData((char*)buf, buf_size);
michael@0:   NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:   return NS_NewInputStreamChannel(aChannel, aURI, stream,
michael@0:                                   NS_LITERAL_CSTRING(IMAGE_ICON_MS));
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsIconChannel::Init(nsIURI* aURI)
michael@0: {
michael@0: 
michael@0:   nsCOMPtr<nsIMozIconURI> iconURI = do_QueryInterface(aURI);
michael@0:   NS_ASSERTION(iconURI, "URI is not an nsIMozIconURI");
michael@0: 
michael@0:   nsAutoCString stockIcon;
michael@0:   iconURI->GetStockIcon(stockIcon);
michael@0: 
michael@0:   nsAutoCString iconSizeString;
michael@0:   iconURI->GetIconSize(iconSizeString);
michael@0: 
michael@0:   uint32_t desiredImageSize;
michael@0:   iconURI->GetImageSize(&desiredImageSize);
michael@0: 
michael@0:   nsAutoCString iconStateString;
michael@0:   iconURI->GetIconState(iconStateString);
michael@0:   bool disabled = iconStateString.EqualsLiteral("disabled");
michael@0: 
michael@0:   // This is a workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=662299
michael@0:   // Try to find corresponding freedesktop icon and fallback to empty QIcon if failed.
michael@0:   QIcon icon = QIcon::fromTheme(QString(stockIcon.get()).replace("gtk-", "edit-"));
michael@0:   QPixmap pixmap = icon.pixmap(desiredImageSize, desiredImageSize, disabled ? QIcon::Disabled : QIcon::Normal);
michael@0: 
michael@0:   QImage image = pixmap.toImage();
michael@0: 
michael@0:   return moz_qicon_to_channel(&image, iconURI,
michael@0:                               getter_AddRefs(mRealChannel));
michael@0: }