gecko/image/decoders/icon/qt/nsIconChannel.cpp

131 lines
3.7 KiB
C++

/* vim:set ts=2 sw=2 sts=2 cin et: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <QIcon>
#include <QStyle>
#include <QApplication>
#include <stdlib.h>
#include <unistd.h>
#include "nsMimeTypes.h"
#include "nsIMIMEService.h"
#include "nsIStringBundle.h"
#include "nsNetUtil.h"
#include "nsIURL.h"
#include "prlink.h"
#include "nsIconChannel.h"
#include "nsGtkQtIconsConverter.h"
NS_IMPL_ISUPPORTS2(nsIconChannel,
nsIRequest,
nsIChannel)
static nsresult
moz_qicon_to_channel(QImage *image, nsIURI *aURI,
nsIChannel **aChannel)
{
NS_ENSURE_ARG_POINTER(image);
int width = image->width();
int height = image->height();
NS_ENSURE_TRUE(height < 256 && width < 256 && height > 0 && width > 0,
NS_ERROR_UNEXPECTED);
const int n_channels = 4;
long int buf_size = 2 + n_channels * height * width;
uint8_t * const buf = (uint8_t*)NS_Alloc(buf_size);
NS_ENSURE_TRUE(buf, NS_ERROR_OUT_OF_MEMORY);
uint8_t *out = buf;
*(out++) = width;
*(out++) = height;
const uchar * const pixels = image->bits();
int rowextra = image->bytesPerLine() - width * n_channels;
// encode the RGB data and the A data
const uchar * in = pixels;
for (int y = 0; y < height; ++y, in += rowextra) {
for (int x = 0; x < width; ++x) {
uint8_t r = *(in++);
uint8_t g = *(in++);
uint8_t b = *(in++);
uint8_t a = *(in++);
#define DO_PREMULTIPLY(c_) uint8_t(uint16_t(c_) * uint16_t(a) / uint16_t(255))
#ifdef IS_LITTLE_ENDIAN
*(out++) = DO_PREMULTIPLY(b);
*(out++) = DO_PREMULTIPLY(g);
*(out++) = DO_PREMULTIPLY(r);
*(out++) = a;
#else
*(out++) = a;
*(out++) = DO_PREMULTIPLY(r);
*(out++) = DO_PREMULTIPLY(g);
*(out++) = DO_PREMULTIPLY(b);
#endif
#undef DO_PREMULTIPLY
}
}
NS_ASSERTION(out == buf + buf_size, "size miscalculation");
nsresult rv;
nsCOMPtr<nsIStringInputStream> stream =
do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = stream->AdoptData((char*)buf, buf_size);
NS_ENSURE_SUCCESS(rv, rv);
return NS_NewInputStreamChannel(aChannel, aURI, stream,
NS_LITERAL_CSTRING(IMAGE_ICON_MS));
}
nsresult
nsIconChannel::Init(nsIURI* aURI)
{
nsCOMPtr<nsIMozIconURI> iconURI = do_QueryInterface(aURI);
NS_ASSERTION(iconURI, "URI is not an nsIMozIconURI");
nsAutoCString stockIcon;
iconURI->GetStockIcon(stockIcon);
nsAutoCString iconSizeString;
iconURI->GetIconSize(iconSizeString);
uint32_t desiredImageSize;
iconURI->GetImageSize(&desiredImageSize);
nsAutoCString iconStateString;
iconURI->GetIconState(iconStateString);
bool disabled = iconStateString.EqualsLiteral("disabled");
QStyle::StandardPixmap sp_icon = (QStyle::StandardPixmap)0;
nsCOMPtr <nsIGtkQtIconsConverter> converter = do_GetService("@mozilla.org/gtkqticonsconverter;1");
if (converter) {
int32_t res = 0;
stockIcon.Cut(0,4);
converter->Convert(stockIcon.get(), &res);
sp_icon = (QStyle::StandardPixmap)res;
// printf("ConvertIcon: icon:'%s' -> res:%i\n", stockIcon.get(), res);
}
if (!sp_icon)
return NS_ERROR_FAILURE;
QStyle *style = qApp->style();
NS_ENSURE_TRUE(style, NS_ERROR_NULL_POINTER);
QPixmap pixmap = style->standardIcon(sp_icon).pixmap(desiredImageSize, desiredImageSize, disabled?QIcon::Disabled:QIcon::Normal);
QImage image = pixmap.toImage();
return moz_qicon_to_channel(&image, iconURI,
getter_AddRefs(mRealChannel));
}