michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 <stdlib.h>
michael@0: #include "mozilla/dom/ContentChild.h"
michael@0: #include "nsMimeTypes.h"
michael@0: #include "nsIURL.h"
michael@0: #include "nsXULAppAPI.h"
michael@0: #include "AndroidBridge.h"
michael@0: #include "nsIconChannel.h"
michael@0: #include "nsIStringStream.h"
michael@0: #include "nsNetUtil.h"
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsIconChannel,
michael@0:                   nsIRequest,
michael@0:                   nsIChannel)
michael@0: 
michael@0: using namespace mozilla;
michael@0: using mozilla::dom::ContentChild;
michael@0: 
michael@0: static nsresult
michael@0: GetIconForExtension(const nsACString& aFileExt, uint32_t aIconSize, uint8_t * const aBuf)
michael@0: {
michael@0:     if (!AndroidBridge::Bridge())
michael@0:         return NS_ERROR_FAILURE;
michael@0: 
michael@0:     AndroidBridge::Bridge()->GetIconForExtension(aFileExt, aIconSize, aBuf);
michael@0: 
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: CallRemoteGetIconForExtension(const nsACString& aFileExt, uint32_t aIconSize, uint8_t * const aBuf)
michael@0: {
michael@0:   NS_ENSURE_TRUE(aBuf != nullptr, NS_ERROR_NULL_POINTER);
michael@0: 
michael@0:   // An array has to be used to get data from remote process
michael@0:   InfallibleTArray<uint8_t> bits;
michael@0:   uint32_t bufSize = aIconSize * aIconSize * 4;
michael@0: 
michael@0:   if (!ContentChild::GetSingleton()->SendGetIconForExtension(PromiseFlatCString(aFileExt), aIconSize, &bits))
michael@0:     return NS_ERROR_FAILURE;
michael@0: 
michael@0:   NS_ASSERTION(bits.Length() == bufSize, "Pixels array is incomplete");
michael@0:   if (bits.Length() != bufSize)
michael@0:     return NS_ERROR_FAILURE;
michael@0: 
michael@0:   memcpy(aBuf, bits.Elements(), bufSize);
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: moz_icon_to_channel(nsIURI *aURI, const nsACString& aFileExt, uint32_t aIconSize, nsIChannel **aChannel)
michael@0: {
michael@0:   NS_ENSURE_TRUE(aIconSize < 256 && aIconSize > 0, NS_ERROR_UNEXPECTED);
michael@0: 
michael@0:   int width = aIconSize;
michael@0:   int height = aIconSize;
michael@0: 
michael@0:   // moz-icon data should have two bytes for the size,
michael@0:   // then the ARGB pixel values with pre-multiplied Alpha
michael@0:   const int channels = 4;
michael@0:   long int buf_size = 2 + 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:   nsresult rv;
michael@0:   if (XRE_GetProcessType() == GeckoProcessType_Default)
michael@0:     rv = GetIconForExtension(aFileExt, aIconSize, out);
michael@0:   else
michael@0:     rv = CallRemoteGetIconForExtension(aFileExt, aIconSize, out);
michael@0:   NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:   // Encode the RGBA data
michael@0:   const uint8_t * in = out;
michael@0:   for (int y = 0; y < height; ++y) {
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:       *(out++) = DO_PREMULTIPLY(b);
michael@0:       *(out++) = DO_PREMULTIPLY(g);
michael@0:       *(out++) = DO_PREMULTIPLY(r);
michael@0:       *(out++) = a;
michael@0: #undef DO_PREMULTIPLY
michael@0:     }
michael@0:   }
michael@0: 
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:   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:   uint32_t desiredImageSize;
michael@0:   iconURI->GetImageSize(&desiredImageSize);
michael@0: 
michael@0:   nsAutoCString iconFileExt;
michael@0:   iconURI->GetFileExtension(iconFileExt);
michael@0: 
michael@0:   return moz_icon_to_channel(iconURI, iconFileExt, desiredImageSize, getter_AddRefs(mRealChannel));
michael@0: }