зеркало из https://github.com/mozilla/pjs.git
659 строки
20 KiB
C++
659 строки
20 KiB
C++
/* vim:set tw=80 expandtab softtabstop=4 ts=4 sw=4: */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is the Mozilla ICO Decoder.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape.
|
|
* Portions created by the Initial Developer are Copyright (C) 2001
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* David Hyatt <hyatt@netscape.com> (Original Author)
|
|
* Christian Biesinger <cbiesinger@web.de>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/* This is a Cross-Platform ICO Decoder, which should work everywhere, including
|
|
* Big-Endian machines like the PowerPC. */
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "nsICODecoder.h"
|
|
|
|
#include "nsIInputStream.h"
|
|
#include "nsIComponentManager.h"
|
|
#include "imgIContainerObserver.h"
|
|
|
|
#include "imgILoad.h"
|
|
|
|
#include "nsIProperties.h"
|
|
#include "nsISupportsPrimitives.h"
|
|
|
|
#include "nsAutoPtr.h"
|
|
|
|
NS_IMPL_ISUPPORTS1(nsICODecoder, imgIDecoder)
|
|
|
|
#define ICONCOUNTOFFSET 4
|
|
#define DIRENTRYOFFSET 6
|
|
#define BITMAPINFOSIZE 40
|
|
#define PREFICONSIZE 16
|
|
|
|
// ----------------------------------------
|
|
// Actual Data Processing
|
|
// ----------------------------------------
|
|
|
|
nsresult nsICODecoder::SetImageData()
|
|
{
|
|
PRUint32 bpr;
|
|
mFrame->GetImageBytesPerRow(&bpr);
|
|
|
|
// Since the ICO is decoded into an exact sized array, the frame may use
|
|
// more bytes per row of pixels than the decoding array.
|
|
#if defined(MOZ_CAIRO_GFX) || defined(XP_MAC) || defined(XP_MACOSX)
|
|
PRUint32 decodedLineLen = mDirEntry.mWidth * 4;
|
|
#else
|
|
PRUint32 decodedLineLen = mDirEntry.mWidth * 3;
|
|
#endif
|
|
|
|
PRUint8* decodeBufferPos = mDecodedBuffer;
|
|
PRUint32 frameOffset = 0;
|
|
|
|
for (PRUint32 i = 0;
|
|
i < mDirEntry.mHeight;
|
|
++i, frameOffset += bpr, decodeBufferPos += decodedLineLen) {
|
|
mFrame->SetImageData(decodeBufferPos, decodedLineLen, frameOffset);
|
|
}
|
|
|
|
nsIntRect r(0, 0, 0, 0);
|
|
mFrame->GetWidth(&r.width);
|
|
mFrame->GetHeight(&r.height);
|
|
mObserver->OnDataAvailable(nsnull, mFrame, &r);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult nsICODecoder::SetAlphaData()
|
|
{
|
|
// Alpha data was already set if bpp == 32
|
|
if (mHaveAlphaData)
|
|
return NS_OK;
|
|
|
|
PRUint32 bpr;
|
|
mFrame->GetAlphaBytesPerRow(&bpr);
|
|
// In case the decoder and frame have different sized alpha buffers, we
|
|
// take the smaller of the two row length values as the row length to copy.
|
|
PRUint32 rowCopyLen = PR_MIN(bpr, mDirEntry.mWidth);
|
|
PRUint8* alphaRow = (PRUint8*)malloc(rowCopyLen);
|
|
if (!alphaRow)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
PRUint32 decoderRowSize = CalcAlphaRowSize();
|
|
PRUint8* alphaBufferPos = mAlphaBuffer;
|
|
PRUint32 frameOffset = 0;
|
|
|
|
for (PRUint32 i = 0; i < mDirEntry.mHeight; i++) {
|
|
PRInt8 byte = 0;
|
|
PRUint32 k = 0;
|
|
for (PRUint32 j = 0; j < rowCopyLen; ++j) {
|
|
if ((j % 8) == 0)
|
|
byte = alphaBufferPos[k++];
|
|
alphaRow[j] = byte >> 7;
|
|
byte <<= 1;
|
|
}
|
|
mFrame->SetAlphaData(alphaRow, rowCopyLen, frameOffset);
|
|
frameOffset += bpr;
|
|
alphaBufferPos += decoderRowSize;
|
|
}
|
|
free(alphaRow);
|
|
return NS_OK;
|
|
}
|
|
|
|
PRUint32 nsICODecoder::CalcAlphaRowSize()
|
|
{
|
|
PRUint32 rowSize = (mDirEntry.mWidth + 7) / 8; // +7 to round up
|
|
if (rowSize % 4)
|
|
rowSize += (4 - (rowSize % 4)); // Pad to DWORD Boundary
|
|
return rowSize;
|
|
}
|
|
|
|
nsICODecoder::nsICODecoder()
|
|
{
|
|
mPos = mNumColors = mRowBytes = mImageOffset = mCurrIcon = mNumIcons = 0;
|
|
mCurLine = 1; // Otherwise decoder will never start
|
|
mStatus = NS_OK;
|
|
mColors = nsnull;
|
|
mRow = nsnull;
|
|
mHaveAlphaData = 0;
|
|
mDecodingAndMask = PR_FALSE;
|
|
mDecodedBuffer = nsnull;
|
|
mAlphaBuffer = nsnull;
|
|
}
|
|
|
|
nsICODecoder::~nsICODecoder()
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP nsICODecoder::Init(imgILoad *aLoad)
|
|
{
|
|
mObserver = do_QueryInterface(aLoad);
|
|
|
|
mImage = do_CreateInstance("@mozilla.org/image/container;1");
|
|
if (!mImage)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
mFrame = do_CreateInstance("@mozilla.org/gfx/image/frame;2");
|
|
if (!mFrame)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
return aLoad->SetImage(mImage);
|
|
}
|
|
|
|
NS_IMETHODIMP nsICODecoder::Close()
|
|
{
|
|
mObserver->OnStopContainer(nsnull, mImage);
|
|
mObserver->OnStopDecode(nsnull, NS_OK, nsnull);
|
|
mObserver = nsnull;
|
|
|
|
mImage = nsnull;
|
|
mFrame = nsnull;
|
|
|
|
mPos = 0;
|
|
|
|
delete[] mColors;
|
|
mColors = nsnull;
|
|
|
|
mCurLine = 0;
|
|
mRowBytes = 0;
|
|
mImageOffset = 0;
|
|
mCurrIcon = 0;
|
|
mNumIcons = 0;
|
|
|
|
free(mRow);
|
|
mRow = nsnull;
|
|
|
|
mDecodingAndMask = PR_FALSE;
|
|
free(mDecodedBuffer);
|
|
free(mAlphaBuffer);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP nsICODecoder::Flush()
|
|
{
|
|
// Set Data here because some ICOs don't have a complete AND Mask
|
|
// see bug 115357
|
|
if (mDecodingAndMask) {
|
|
#ifndef MOZ_CAIRO_GFX
|
|
SetAlphaData();
|
|
#endif
|
|
SetImageData();
|
|
mObserver->OnStopFrame(nsnull, mFrame);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
NS_METHOD nsICODecoder::ReadSegCb(nsIInputStream* aIn, void* aClosure,
|
|
const char* aFromRawSegment, PRUint32 aToOffset,
|
|
PRUint32 aCount, PRUint32 *aWriteCount) {
|
|
nsICODecoder *decoder = NS_REINTERPRET_CAST(nsICODecoder*, aClosure);
|
|
*aWriteCount = aCount;
|
|
decoder->mStatus = decoder->ProcessData(aFromRawSegment, aCount);
|
|
return decoder->mStatus;
|
|
}
|
|
|
|
NS_IMETHODIMP nsICODecoder::WriteFrom(nsIInputStream *aInStr, PRUint32 aCount, PRUint32 *aRetval)
|
|
{
|
|
nsresult rv = aInStr->ReadSegments(ReadSegCb, this, aCount, aRetval);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
return mStatus;
|
|
}
|
|
|
|
nsresult nsICODecoder::ProcessData(const char* aBuffer, PRUint32 aCount) {
|
|
if (!aCount) // aCount=0 means EOF
|
|
return NS_OK;
|
|
|
|
while (aCount && (mPos < ICONCOUNTOFFSET)) { // Skip to the # of icons.
|
|
if (mPos == 2) { // if the third byte is 1: This is an icon, 2: a cursor
|
|
if ((*aBuffer != 1) && (*aBuffer != 2)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
mIsCursor = (*aBuffer == 2);
|
|
}
|
|
mPos++; aBuffer++; aCount--;
|
|
}
|
|
|
|
if (mPos == ICONCOUNTOFFSET && aCount >= 2) {
|
|
mNumIcons = LITTLE_TO_NATIVE16(((PRUint16*)aBuffer)[0]);
|
|
aBuffer += 2;
|
|
mPos += 2;
|
|
aCount -= 2;
|
|
}
|
|
|
|
if (mNumIcons == 0)
|
|
return NS_OK; // Nothing to do.
|
|
|
|
PRUint16 colorDepth = 0;
|
|
while (mCurrIcon < mNumIcons) {
|
|
if (mPos >= DIRENTRYOFFSET + (mCurrIcon*sizeof(mDirEntryArray)) &&
|
|
mPos < DIRENTRYOFFSET + ((mCurrIcon+1)*sizeof(mDirEntryArray))) {
|
|
PRUint32 toCopy = sizeof(mDirEntryArray) - (mPos - DIRENTRYOFFSET - mCurrIcon*sizeof(mDirEntryArray));
|
|
if (toCopy > aCount)
|
|
toCopy = aCount;
|
|
memcpy(mDirEntryArray + sizeof(mDirEntryArray) - toCopy, aBuffer, toCopy);
|
|
mPos += toCopy;
|
|
aCount -= toCopy;
|
|
aBuffer += toCopy;
|
|
}
|
|
if (aCount == 0)
|
|
return NS_OK; // Need more data
|
|
|
|
IconDirEntry e;
|
|
if (mPos == 22+mCurrIcon*sizeof(mDirEntryArray)) {
|
|
mCurrIcon++;
|
|
ProcessDirEntry(e);
|
|
if ((e.mWidth == PREFICONSIZE && e.mHeight == PREFICONSIZE && e.mBitCount >= colorDepth)
|
|
|| (mCurrIcon == mNumIcons && mImageOffset == 0)) {
|
|
mImageOffset = e.mImageOffset;
|
|
|
|
// ensure mImageOffset is >= the size of the direntry headers (bug #245631)
|
|
PRUint32 minImageOffset = DIRENTRYOFFSET + mNumIcons*sizeof(mDirEntryArray);
|
|
if (mImageOffset < minImageOffset)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
colorDepth = e.mBitCount;
|
|
memcpy(&mDirEntry, &e, sizeof(IconDirEntry));
|
|
}
|
|
}
|
|
}
|
|
|
|
while (aCount && mPos < mImageOffset) { // Skip to our offset
|
|
mPos++; aBuffer++; aCount--;
|
|
}
|
|
|
|
if (mCurrIcon == mNumIcons && mPos >= mImageOffset && mPos < mImageOffset + BITMAPINFOSIZE) {
|
|
// We've found the icon.
|
|
PRUint32 toCopy = sizeof(mBIHraw) - (mPos - mImageOffset);
|
|
if (toCopy > aCount)
|
|
toCopy = aCount;
|
|
|
|
memcpy(mBIHraw + (mPos - mImageOffset), aBuffer, toCopy);
|
|
mPos += toCopy;
|
|
aCount -= toCopy;
|
|
aBuffer += toCopy;
|
|
}
|
|
|
|
nsresult rv;
|
|
|
|
if (mPos == mImageOffset + BITMAPINFOSIZE) {
|
|
rv = mObserver->OnStartDecode(nsnull);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
ProcessInfoHeader();
|
|
if (mBIH.bpp <= 8) {
|
|
switch (mBIH.bpp) {
|
|
case 1:
|
|
mNumColors = 2;
|
|
break;
|
|
case 4:
|
|
mNumColors = 16;
|
|
break;
|
|
case 8:
|
|
mNumColors = 256;
|
|
break;
|
|
default:
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
mColors = new colorTable[mNumColors];
|
|
if (!mColors)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
rv = mImage->Init(mDirEntry.mWidth, mDirEntry.mHeight, mObserver);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (mIsCursor) {
|
|
nsCOMPtr<nsIProperties> props(do_QueryInterface(mImage));
|
|
if (props) {
|
|
nsCOMPtr<nsISupportsPRUint32> intwrapx = do_CreateInstance("@mozilla.org/supports-PRUint32;1");
|
|
nsCOMPtr<nsISupportsPRUint32> intwrapy = do_CreateInstance("@mozilla.org/supports-PRUint32;1");
|
|
|
|
if (intwrapx && intwrapy) {
|
|
intwrapx->SetData(mDirEntry.mXHotspot);
|
|
intwrapy->SetData(mDirEntry.mYHotspot);
|
|
|
|
props->Set("hotspotX", intwrapx);
|
|
props->Set("hotspotY", intwrapy);
|
|
}
|
|
}
|
|
}
|
|
|
|
rv = mObserver->OnStartContainer(nsnull, mImage);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
mCurLine = mDirEntry.mHeight;
|
|
mRow = (PRUint8*)malloc((mDirEntry.mWidth * mBIH.bpp)/8 + 4);
|
|
// +4 because the line is padded to a 4 bit boundary, but I don't want
|
|
// to make exact calculations here, that's unnecessary.
|
|
// Also, it compensates rounding error.
|
|
if (!mRow)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
rv = mFrame->Init(0, 0, mDirEntry.mWidth, mDirEntry.mHeight, GFXFORMATALPHA8, 24);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
rv = mImage->AppendFrame(mFrame);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
mObserver->OnStartFrame(nsnull, mFrame);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
if (mColors && (mPos >= mImageOffset + BITMAPINFOSIZE) &&
|
|
(mPos < (mImageOffset + BITMAPINFOSIZE + mNumColors * 4))) {
|
|
// We will receive (mNumColors * 4) bytes of color data
|
|
PRUint32 colorBytes = mPos - (mImageOffset + 40); // Number of bytes already received
|
|
PRUint8 colorNum = colorBytes / 4; // Color which is currently received
|
|
PRUint8 at = colorBytes % 4;
|
|
while (aCount && (mPos < (mImageOffset + BITMAPINFOSIZE + mNumColors * 4))) {
|
|
switch (at) {
|
|
case 0:
|
|
mColors[colorNum].blue = *aBuffer;
|
|
break;
|
|
case 1:
|
|
mColors[colorNum].green = *aBuffer;
|
|
break;
|
|
case 2:
|
|
mColors[colorNum].red = *aBuffer;
|
|
break;
|
|
case 3:
|
|
colorNum++; // This is a padding byte
|
|
break;
|
|
}
|
|
mPos++; aBuffer++; aCount--;
|
|
at = (at + 1) % 4;
|
|
}
|
|
}
|
|
|
|
if (!mDecodingAndMask && (mPos >= (mImageOffset + BITMAPINFOSIZE + mNumColors*4))) {
|
|
if (mPos == (mImageOffset + BITMAPINFOSIZE + mNumColors*4)) {
|
|
// Increment mPos to avoid reprocessing the info header.
|
|
mPos++;
|
|
#if defined(MOZ_CAIRO_GFX) || defined(XP_MAC) || defined(XP_MACOSX)
|
|
mDecodedBuffer = (PRUint8*)malloc(mDirEntry.mHeight*mDirEntry.mWidth*4);
|
|
#else
|
|
mDecodedBuffer = (PRUint8*)malloc(mDirEntry.mHeight*mDirEntry.mWidth*3);
|
|
#endif
|
|
if (!mDecodedBuffer)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
PRUint32 alphaRowSize;
|
|
mFrame->GetAlphaBytesPerRow(&alphaRowSize);
|
|
nsAutoArrayPtr<PRUint8> alphaRow; // Will only be used if bpp == 32
|
|
if (mBIH.bpp == 32) {
|
|
alphaRow = new PRUint8[alphaRowSize];
|
|
if (!alphaRow)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
// Ensure memory has been allocated before decoding. If we get this far
|
|
// without allocated memory, the file is most likely invalid.
|
|
NS_ASSERTION(mRow, "mRow is null");
|
|
NS_ASSERTION(mDecodedBuffer, "mDecodedBuffer is null");
|
|
if (!mRow || !mDecodedBuffer)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
PRUint32 rowSize = (mBIH.bpp * mDirEntry.mWidth + 7) / 8; // +7 to round up
|
|
if (rowSize % 4)
|
|
rowSize += (4 - (rowSize % 4)); // Pad to DWORD Boundary
|
|
PRUint32 toCopy;
|
|
do {
|
|
toCopy = rowSize - mRowBytes;
|
|
if (toCopy) {
|
|
if (toCopy > aCount)
|
|
toCopy = aCount;
|
|
memcpy(mRow + mRowBytes, aBuffer, toCopy);
|
|
aCount -= toCopy;
|
|
aBuffer += toCopy;
|
|
mRowBytes += toCopy;
|
|
}
|
|
if (rowSize == mRowBytes) {
|
|
mCurLine--;
|
|
PRUint8* decoded = mDecodedBuffer + (mCurLine * mDirEntry.mWidth * GFXBYTESPERPIXEL);
|
|
PRUint8* p = mRow;
|
|
PRUint8* d = decoded;
|
|
PRUint8* alphaPos = alphaRow; // only used if bpp == 32
|
|
PRUint32 lpos = mDirEntry.mWidth;
|
|
switch (mBIH.bpp) {
|
|
case 1:
|
|
while (lpos > 0) {
|
|
PRInt8 bit;
|
|
PRUint8 idx;
|
|
for (bit = 7; bit >= 0 && lpos > 0; bit--) {
|
|
idx = (*p >> bit) & 1;
|
|
SetPixel(d, idx, mColors);
|
|
--lpos;
|
|
}
|
|
++p;
|
|
}
|
|
break;
|
|
case 4:
|
|
while (lpos > 0) {
|
|
Set4BitPixel(d, *p, lpos, mColors);
|
|
++p;
|
|
}
|
|
break;
|
|
case 8:
|
|
while (lpos > 0) {
|
|
SetPixel(d, *p, mColors);
|
|
--lpos;
|
|
++p;
|
|
}
|
|
break;
|
|
case 16:
|
|
while (lpos > 0) {
|
|
SetPixel(d,
|
|
(p[1] & 124) << 1,
|
|
((p[1] & 3) << 6) | ((p[0] & 224) >> 2),
|
|
(p[0] & 31) << 3);
|
|
|
|
--lpos;
|
|
p+=2;
|
|
}
|
|
break;
|
|
case 32:
|
|
case 24:
|
|
while (lpos > 0) {
|
|
#ifdef MOZ_CAIRO_GFX
|
|
SetPixel(d, p[2], p[1], p[0], (mBIH.bpp == 32) ? p[3] : 0xff);
|
|
#else
|
|
SetPixel(d, p[2], p[1], p[0]);
|
|
#endif
|
|
p += 3;
|
|
--lpos;
|
|
if (mBIH.bpp == 32)
|
|
mHaveAlphaData |= *alphaPos++ = *p++; // Alpha value
|
|
}
|
|
break;
|
|
default:
|
|
// This is probably the wrong place to check this...
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (mCurLine == 0)
|
|
mDecodingAndMask = PR_TRUE;
|
|
|
|
mRowBytes = 0;
|
|
|
|
// If 32 bit image, gotta set the alpha data here
|
|
if (mBIH.bpp == 32)
|
|
mFrame->SetAlphaData(alphaRow, alphaRowSize, mCurLine * alphaRowSize);
|
|
}
|
|
} while (!mDecodingAndMask && aCount > 0);
|
|
|
|
}
|
|
|
|
if (mDecodingAndMask && !mHaveAlphaData) {
|
|
PRUint32 rowSize = CalcAlphaRowSize();
|
|
|
|
if (mPos == (1 + mImageOffset + BITMAPINFOSIZE + mNumColors*4)) {
|
|
mPos++;
|
|
mRowBytes = 0;
|
|
mCurLine = mDirEntry.mHeight;
|
|
free(mRow);
|
|
mRow = (PRUint8*)malloc(rowSize);
|
|
if (!mRow)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
#ifndef MOZ_CAIRO_GFX
|
|
mAlphaBuffer = (PRUint8*)malloc(mDirEntry.mHeight*rowSize);
|
|
if (!mAlphaBuffer)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
memset(mAlphaBuffer, 0xff, mDirEntry.mHeight*rowSize);
|
|
#endif
|
|
}
|
|
|
|
// Ensure memory has been allocated before decoding.
|
|
#ifdef MOZ_CAIRO_GFX
|
|
NS_ASSERTION(mRow, "mRow is null");
|
|
NS_ASSERTION(mDecodedBuffer, "mDecodedBuffer is null");
|
|
if (!mRow || !mDecodedBuffer)
|
|
return NS_ERROR_FAILURE;
|
|
#else
|
|
NS_ASSERTION(mRow, "mRow is null");
|
|
NS_ASSERTION(mAlphaBuffer, "mAlphaBuffer is null");
|
|
if (!mRow || !mAlphaBuffer)
|
|
return NS_ERROR_FAILURE;
|
|
#endif
|
|
|
|
PRUint32 toCopy;
|
|
do {
|
|
if (mCurLine == 0) {
|
|
return NS_OK;
|
|
}
|
|
|
|
toCopy = rowSize - mRowBytes;
|
|
if (toCopy) {
|
|
if (toCopy > aCount)
|
|
toCopy = aCount;
|
|
memcpy(mRow + mRowBytes, aBuffer, toCopy);
|
|
aCount -= toCopy;
|
|
aBuffer += toCopy;
|
|
mRowBytes += toCopy;
|
|
}
|
|
if ((rowSize - mRowBytes) == 0) {
|
|
mCurLine--;
|
|
|
|
#ifdef MOZ_CAIRO_GFX
|
|
PRUint8* decoded =
|
|
mDecodedBuffer + (mCurLine * mDirEntry.mWidth * GFXBYTESPERPIXEL);
|
|
#ifdef IS_LITTLE_ENDIAN
|
|
decoded += 3;
|
|
#endif
|
|
PRUint8* decoded_end =
|
|
decoded + mDirEntry.mWidth * GFXBYTESPERPIXEL;
|
|
for (PRUint8* p = mRow, *p_end = mRow + rowSize; p < p_end; ++p) {
|
|
PRUint8 idx = *p;
|
|
for (PRUint8 bit = 0x80; bit && decoded<decoded_end; bit >>= 1) {
|
|
// We complement the value, since our method of storing
|
|
// transparency is opposite what Win32 uses in its masks.
|
|
*decoded = (idx & bit) ? 0x00 : 0xff;
|
|
decoded += 4;
|
|
}
|
|
}
|
|
#else
|
|
PRUint8* decoded = mAlphaBuffer+(mCurLine*rowSize);
|
|
PRUint8* p = mRow;
|
|
PRUint32 lpos = 0;
|
|
while (lpos < rowSize) {
|
|
PRUint8 idx = *p;
|
|
idx ^= 255; // We complement the value, since our method of storing transparency is opposite
|
|
// what Win32 uses in its masks.
|
|
decoded[lpos] = idx;
|
|
lpos++;
|
|
p++;
|
|
}
|
|
#endif
|
|
|
|
mRowBytes = 0;
|
|
}
|
|
} while (aCount > 0);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsICODecoder::ProcessDirEntry(IconDirEntry& aTarget)
|
|
{
|
|
memset(&aTarget, 0, sizeof(aTarget));
|
|
memcpy(&aTarget.mWidth, mDirEntryArray, sizeof(aTarget.mWidth));
|
|
memcpy(&aTarget.mHeight, mDirEntryArray+1, sizeof(aTarget.mHeight));
|
|
memcpy(&aTarget.mColorCount, mDirEntryArray+2, sizeof(aTarget.mColorCount));
|
|
memcpy(&aTarget.mReserved, mDirEntryArray+3, sizeof(aTarget.mReserved));
|
|
|
|
memcpy(&aTarget.mPlanes, mDirEntryArray+4, sizeof(aTarget.mPlanes));
|
|
aTarget.mPlanes = LITTLE_TO_NATIVE16(aTarget.mPlanes);
|
|
|
|
memcpy(&aTarget.mBitCount, mDirEntryArray+6, sizeof(aTarget.mBitCount));
|
|
aTarget.mBitCount = LITTLE_TO_NATIVE16(aTarget.mBitCount);
|
|
|
|
memcpy(&aTarget.mBytesInRes, mDirEntryArray+8, sizeof(aTarget.mBytesInRes));
|
|
aTarget.mBytesInRes = LITTLE_TO_NATIVE32(aTarget.mBytesInRes);
|
|
|
|
memcpy(&aTarget.mImageOffset, mDirEntryArray+12, sizeof(aTarget.mImageOffset));
|
|
aTarget.mImageOffset = LITTLE_TO_NATIVE32(aTarget.mImageOffset);
|
|
}
|
|
|
|
void nsICODecoder::ProcessInfoHeader() {
|
|
memset(&mBIH, 0, sizeof(mBIH));
|
|
// Ignoring the size; it should always be 40 for icons, anyway
|
|
|
|
memcpy(&mBIH.width, mBIHraw + 4, sizeof(mBIH.width));
|
|
memcpy(&mBIH.height, mBIHraw + 8, sizeof(mBIH.height));
|
|
memcpy(&mBIH.planes, mBIHraw + 12, sizeof(mBIH.planes));
|
|
memcpy(&mBIH.bpp, mBIHraw + 14, sizeof(mBIH.bpp));
|
|
memcpy(&mBIH.compression, mBIHraw + 16, sizeof(mBIH.compression));
|
|
memcpy(&mBIH.image_size, mBIHraw + 20, sizeof(mBIH.image_size));
|
|
memcpy(&mBIH.xppm, mBIHraw + 24, sizeof(mBIH.xppm));
|
|
memcpy(&mBIH.yppm, mBIHraw + 28, sizeof(mBIH.yppm));
|
|
memcpy(&mBIH.colors, mBIHraw + 32, sizeof(mBIH.colors));
|
|
memcpy(&mBIH.important_colors, mBIHraw + 36, sizeof(mBIH.important_colors));
|
|
|
|
// Convert endianness
|
|
mBIH.width = LITTLE_TO_NATIVE32(mBIH.width);
|
|
mBIH.height = LITTLE_TO_NATIVE32(mBIH.height);
|
|
mBIH.planes = LITTLE_TO_NATIVE16(mBIH.planes);
|
|
mBIH.bpp = LITTLE_TO_NATIVE16(mBIH.bpp);
|
|
|
|
mBIH.compression = LITTLE_TO_NATIVE32(mBIH.compression);
|
|
mBIH.image_size = LITTLE_TO_NATIVE32(mBIH.image_size);
|
|
mBIH.xppm = LITTLE_TO_NATIVE32(mBIH.xppm);
|
|
mBIH.yppm = LITTLE_TO_NATIVE32(mBIH.yppm);
|
|
mBIH.colors = LITTLE_TO_NATIVE32(mBIH.colors);
|
|
mBIH.important_colors = LITTLE_TO_NATIVE32(mBIH.important_colors);
|
|
}
|
|
|