1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/image/decoders/icon/android/nsIconChannel.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,125 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include <stdlib.h>
1.10 +#include "mozilla/dom/ContentChild.h"
1.11 +#include "nsMimeTypes.h"
1.12 +#include "nsIURL.h"
1.13 +#include "nsXULAppAPI.h"
1.14 +#include "AndroidBridge.h"
1.15 +#include "nsIconChannel.h"
1.16 +#include "nsIStringStream.h"
1.17 +#include "nsNetUtil.h"
1.18 +
1.19 +NS_IMPL_ISUPPORTS(nsIconChannel,
1.20 + nsIRequest,
1.21 + nsIChannel)
1.22 +
1.23 +using namespace mozilla;
1.24 +using mozilla::dom::ContentChild;
1.25 +
1.26 +static nsresult
1.27 +GetIconForExtension(const nsACString& aFileExt, uint32_t aIconSize, uint8_t * const aBuf)
1.28 +{
1.29 + if (!AndroidBridge::Bridge())
1.30 + return NS_ERROR_FAILURE;
1.31 +
1.32 + AndroidBridge::Bridge()->GetIconForExtension(aFileExt, aIconSize, aBuf);
1.33 +
1.34 + return NS_OK;
1.35 +}
1.36 +
1.37 +static nsresult
1.38 +CallRemoteGetIconForExtension(const nsACString& aFileExt, uint32_t aIconSize, uint8_t * const aBuf)
1.39 +{
1.40 + NS_ENSURE_TRUE(aBuf != nullptr, NS_ERROR_NULL_POINTER);
1.41 +
1.42 + // An array has to be used to get data from remote process
1.43 + InfallibleTArray<uint8_t> bits;
1.44 + uint32_t bufSize = aIconSize * aIconSize * 4;
1.45 +
1.46 + if (!ContentChild::GetSingleton()->SendGetIconForExtension(PromiseFlatCString(aFileExt), aIconSize, &bits))
1.47 + return NS_ERROR_FAILURE;
1.48 +
1.49 + NS_ASSERTION(bits.Length() == bufSize, "Pixels array is incomplete");
1.50 + if (bits.Length() != bufSize)
1.51 + return NS_ERROR_FAILURE;
1.52 +
1.53 + memcpy(aBuf, bits.Elements(), bufSize);
1.54 +
1.55 + return NS_OK;
1.56 +}
1.57 +
1.58 +static nsresult
1.59 +moz_icon_to_channel(nsIURI *aURI, const nsACString& aFileExt, uint32_t aIconSize, nsIChannel **aChannel)
1.60 +{
1.61 + NS_ENSURE_TRUE(aIconSize < 256 && aIconSize > 0, NS_ERROR_UNEXPECTED);
1.62 +
1.63 + int width = aIconSize;
1.64 + int height = aIconSize;
1.65 +
1.66 + // moz-icon data should have two bytes for the size,
1.67 + // then the ARGB pixel values with pre-multiplied Alpha
1.68 + const int channels = 4;
1.69 + long int buf_size = 2 + channels * height * width;
1.70 + uint8_t * const buf = (uint8_t*)NS_Alloc(buf_size);
1.71 + NS_ENSURE_TRUE(buf, NS_ERROR_OUT_OF_MEMORY);
1.72 + uint8_t * out = buf;
1.73 +
1.74 + *(out++) = width;
1.75 + *(out++) = height;
1.76 +
1.77 + nsresult rv;
1.78 + if (XRE_GetProcessType() == GeckoProcessType_Default)
1.79 + rv = GetIconForExtension(aFileExt, aIconSize, out);
1.80 + else
1.81 + rv = CallRemoteGetIconForExtension(aFileExt, aIconSize, out);
1.82 + NS_ENSURE_SUCCESS(rv, rv);
1.83 +
1.84 + // Encode the RGBA data
1.85 + const uint8_t * in = out;
1.86 + for (int y = 0; y < height; ++y) {
1.87 + for (int x = 0; x < width; ++x) {
1.88 + uint8_t r = *(in++);
1.89 + uint8_t g = *(in++);
1.90 + uint8_t b = *(in++);
1.91 + uint8_t a = *(in++);
1.92 +#define DO_PREMULTIPLY(c_) uint8_t(uint16_t(c_) * uint16_t(a) / uint16_t(255))
1.93 + *(out++) = DO_PREMULTIPLY(b);
1.94 + *(out++) = DO_PREMULTIPLY(g);
1.95 + *(out++) = DO_PREMULTIPLY(r);
1.96 + *(out++) = a;
1.97 +#undef DO_PREMULTIPLY
1.98 + }
1.99 + }
1.100 +
1.101 + nsCOMPtr<nsIStringInputStream> stream =
1.102 + do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv);
1.103 + NS_ENSURE_SUCCESS(rv, rv);
1.104 +
1.105 + rv = stream->AdoptData((char*)buf, buf_size);
1.106 + NS_ENSURE_SUCCESS(rv, rv);
1.107 +
1.108 + return NS_NewInputStreamChannel(aChannel, aURI, stream,
1.109 + NS_LITERAL_CSTRING(IMAGE_ICON_MS));
1.110 +}
1.111 +
1.112 +nsresult
1.113 +nsIconChannel::Init(nsIURI* aURI)
1.114 +{
1.115 + nsCOMPtr<nsIMozIconURI> iconURI = do_QueryInterface(aURI);
1.116 + NS_ASSERTION(iconURI, "URI is not an nsIMozIconURI");
1.117 +
1.118 + nsAutoCString stockIcon;
1.119 + iconURI->GetStockIcon(stockIcon);
1.120 +
1.121 + uint32_t desiredImageSize;
1.122 + iconURI->GetImageSize(&desiredImageSize);
1.123 +
1.124 + nsAutoCString iconFileExt;
1.125 + iconURI->GetFileExtension(iconFileExt);
1.126 +
1.127 + return moz_icon_to_channel(iconURI, iconFileExt, desiredImageSize, getter_AddRefs(mRealChannel));
1.128 +}
