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gecko/image/decoders/icon/os2/nsIconChannel.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 sts=2 et cin: */
/* 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 "nsIconChannel.h"
#include "nsIIconURI.h"
#include "nsReadableUtils.h"
#include "nsMemory.h"
#include "nsNetUtil.h"
#include "nsIFile.h"
#include "nsIFileURL.h"
#include "nsDirectoryServiceDefs.h"
#include "nsIRwsService.h"
#define INCL_PM
#include <os2.h>
//------------------------------------------------------------------------
// Due to byte swap, the second nibble is the first pixel of the pair
#define FIRSTPEL(x) (0xF & (x >> 4))
#define SECONDPEL(x) (0xF & x)
// nbr of bytes per row, rounded up to the nearest dword boundary
#define ALIGNEDBPR(cx,bits) ((( ((cx)*(bits)) + 31) / 32) * 4)
// nbr of bytes per row, rounded up to the nearest byte boundary
#define UNALIGNEDBPR(cx,bits) (( ((cx)*(bits)) + 7) / 8)
// native icon functions
static HPOINTER GetIcon(nsCString& file, bool fExists,
bool fMini, bool *fWpsIcon);
static void DestroyIcon(HPOINTER hIcon, bool fWpsIcon);
void ConvertColorBitMap(uint8_t *inBuf, PBITMAPINFO2 pBMInfo,
uint8_t *outBuf, bool fShrink);
void ConvertMaskBitMap(uint8_t *inBuf, PBITMAPINFO2 pBMInfo,
uint8_t *outBuf, bool fShrink);
//------------------------------------------------------------------------
// reduces overhead by preventing calls to nsRws when it isn't present
static bool sUseRws = true;
//------------------------------------------------------------------------
// nsIconChannel methods
nsIconChannel::nsIconChannel()
{
}
nsIconChannel::~nsIconChannel()
{}
NS_IMPL_THREADSAFE_ISUPPORTS4(nsIconChannel,
nsIChannel,
nsIRequest,
nsIRequestObserver,
nsIStreamListener)
nsresult nsIconChannel::Init(nsIURI* uri)
{
NS_ASSERTION(uri, "no uri");
mUrl = uri;
mOriginalURI = uri;
nsresult rv;
mPump = do_CreateInstance(NS_INPUTSTREAMPUMP_CONTRACTID, &rv);
return rv;
}
//------------------------------------------------------------------------
// nsIRequest methods:
NS_IMETHODIMP nsIconChannel::GetName(nsACString &result)
{
return mUrl->GetSpec(result);
}
NS_IMETHODIMP nsIconChannel::IsPending(bool *result)
{
return mPump->IsPending(result);
}
NS_IMETHODIMP nsIconChannel::GetStatus(nsresult *status)
{
return mPump->GetStatus(status);
}
NS_IMETHODIMP nsIconChannel::Cancel(nsresult status)
{
return mPump->Cancel(status);
}
NS_IMETHODIMP nsIconChannel::Suspend(void)
{
return mPump->Suspend();
}
NS_IMETHODIMP nsIconChannel::Resume(void)
{
return mPump->Resume();
}
NS_IMETHODIMP nsIconChannel::GetLoadGroup(nsILoadGroup* *aLoadGroup)
{
*aLoadGroup = mLoadGroup;
NS_IF_ADDREF(*aLoadGroup);
return NS_OK;
}
NS_IMETHODIMP nsIconChannel::SetLoadGroup(nsILoadGroup* aLoadGroup)
{
mLoadGroup = aLoadGroup;
return NS_OK;
}
NS_IMETHODIMP nsIconChannel::GetLoadFlags(uint32_t *aLoadAttributes)
{
return mPump->GetLoadFlags(aLoadAttributes);
}
NS_IMETHODIMP nsIconChannel::SetLoadFlags(uint32_t aLoadAttributes)
{
return mPump->SetLoadFlags(aLoadAttributes);
}
//------------------------------------------------------------------------
// nsIChannel methods:
NS_IMETHODIMP nsIconChannel::GetOriginalURI(nsIURI* *aURI)
{
*aURI = mOriginalURI;
NS_ADDREF(*aURI);
return NS_OK;
}
NS_IMETHODIMP nsIconChannel::SetOriginalURI(nsIURI* aURI)
{
NS_ENSURE_ARG_POINTER(aURI);
mOriginalURI = aURI;
return NS_OK;
}
NS_IMETHODIMP nsIconChannel::GetURI(nsIURI* *aURI)
{
*aURI = mUrl;
NS_IF_ADDREF(*aURI);
return NS_OK;
}
NS_IMETHODIMP
nsIconChannel::Open(nsIInputStream **_retval)
{
return MakeInputStream(_retval, false);
}
NS_IMETHODIMP nsIconChannel::AsyncOpen(nsIStreamListener *aListener, nsISupports *ctxt)
{
nsCOMPtr<nsIInputStream> inStream;
nsresult rv = MakeInputStream(getter_AddRefs(inStream), true);
if (NS_FAILED(rv))
return rv;
// Init our streampump
rv = mPump->Init(inStream, int64_t(-1), int64_t(-1), 0, 0, false);
if (NS_FAILED(rv))
return rv;
rv = mPump->AsyncRead(this, ctxt);
if (NS_SUCCEEDED(rv)) {
// Store our real listener
mListener = aListener;
// Add ourself to the load group, if available
if (mLoadGroup)
mLoadGroup->AddRequest(this, nullptr);
}
return rv;
}
nsresult nsIconChannel::ExtractIconInfoFromUrl(nsIFile ** aLocalFile, uint32_t * aDesiredImageSize, nsACString &aContentType, nsACString &aFileExtension)
{
nsresult rv = NS_OK;
nsCOMPtr<nsIMozIconURI> iconURI (do_QueryInterface(mUrl, &rv));
NS_ENSURE_SUCCESS(rv, rv);
iconURI->GetImageSize(aDesiredImageSize);
iconURI->GetContentType(aContentType);
iconURI->GetFileExtension(aFileExtension);
nsCOMPtr<nsIURL> url;
rv = iconURI->GetIconURL(getter_AddRefs(url));
if (NS_FAILED(rv) || !url) return NS_OK;
nsCOMPtr<nsIFileURL> fileURL = do_QueryInterface(url, &rv);
if (NS_FAILED(rv) || !fileURL) return NS_OK;
nsCOMPtr<nsIFile> file;
rv = fileURL->GetFile(getter_AddRefs(file));
if (NS_FAILED(rv) || !file) return NS_OK;
*aLocalFile = file;
NS_IF_ADDREF(*aLocalFile);
return NS_OK;
}
//------------------------------------------------------------------------
// retrieves a native icon with 16, 256, or 16M colors and converts it to cairo
// format; Note: this implementation ignores the file's MIME-type because
// using it virtually guarantees we'll end up with an inappropriate icon (i.e.
// an .exe icon)
nsresult nsIconChannel::MakeInputStream(nsIInputStream **_retval,
bool nonBlocking)
{
// get some details about this icon
nsCOMPtr<nsIFile> localFile;
uint32_t desiredImageSize;
nsXPIDLCString contentType;
nsAutoCString filePath;
nsresult rv = ExtractIconInfoFromUrl(getter_AddRefs(localFile),
&desiredImageSize, contentType,
filePath);
NS_ENSURE_SUCCESS(rv, rv);
// if the file exists, get its path
bool fileExists = false;
if (localFile) {
localFile->GetNativePath(filePath);
localFile->Exists(&fileExists);
}
// get the file's icon from either the WPS or PM
bool fWpsIcon = false;
HPOINTER hIcon = GetIcon(filePath, fileExists,
desiredImageSize <= 16, &fWpsIcon);
if (hIcon == NULLHANDLE)
return NS_ERROR_FAILURE;
// get the color & mask bitmaps used by the icon
POINTERINFO IconInfo;
if (!WinQueryPointerInfo(hIcon, &IconInfo)) {
DestroyIcon(hIcon, fWpsIcon);
return NS_ERROR_FAILURE;
}
// if we need a mini-icon, use those bitmaps if present;
// otherwise, signal that the icon needs to be shrunk
bool fShrink = FALSE;
if (desiredImageSize <= 16) {
if (IconInfo.hbmMiniPointer) {
IconInfo.hbmColor = IconInfo.hbmMiniColor;
IconInfo.hbmPointer = IconInfo.hbmMiniPointer;
} else {
fShrink = TRUE;
}
}
// various resources to be allocated
PBITMAPINFO2 pBMInfo = 0;
uint8_t* pInBuf = 0;
uint8_t* pOutBuf = 0;
HDC hdc = 0;
HPS hps = 0;
// using this dummy do{...}while(0) "loop" guarantees that resources will
// be deallocated, but eliminates the need for nesting, and generally makes
// testing for & dealing with errors pretty painless (just 'break')
do {
rv = NS_ERROR_FAILURE;
// get the details for the color bitmap; if there isn't one
// or this is 1-bit color, exit
BITMAPINFOHEADER2 BMHeader;
BMHeader.cbFix = sizeof(BMHeader);
if (!IconInfo.hbmColor ||
!GpiQueryBitmapInfoHeader(IconInfo.hbmColor, &BMHeader) ||
BMHeader.cBitCount == 1)
break;
// alloc space for the color bitmap's info, including its color table
uint32_t cbBMInfo = sizeof(BITMAPINFO2) + (sizeof(RGB2) * 255);
pBMInfo = (PBITMAPINFO2)nsMemory::Alloc(cbBMInfo);
if (!pBMInfo)
break;
// alloc space for the color bitmap data
uint32_t cbInRow = ALIGNEDBPR(BMHeader.cx, BMHeader.cBitCount);
uint32_t cbInBuf = cbInRow * BMHeader.cy;
pInBuf = (uint8_t*)nsMemory::Alloc(cbInBuf);
if (!pInBuf)
break;
memset(pInBuf, 0, cbInBuf);
// alloc space for the BGRA32 bitmap we're creating
uint32_t cxOut = fShrink ? BMHeader.cx / 2 : BMHeader.cx;
uint32_t cyOut = fShrink ? BMHeader.cy / 2 : BMHeader.cy;
uint32_t cbOutBuf = 2 + ALIGNEDBPR(cxOut, 32) * cyOut;
pOutBuf = (uint8_t*)nsMemory::Alloc(cbOutBuf);
if (!pOutBuf)
break;
memset(pOutBuf, 0, cbOutBuf);
// create a DC and PS
DEVOPENSTRUC dop = {NULL, "DISPLAY", NULL, NULL, NULL, NULL, NULL, NULL, NULL};
hdc = DevOpenDC((HAB)0, OD_MEMORY, "*", 5L, (PDEVOPENDATA)&dop, NULLHANDLE);
if (!hdc)
break;
SIZEL sizel = {0,0};
hps = GpiCreatePS((HAB)0, hdc, &sizel, GPIA_ASSOC | PU_PELS | GPIT_MICRO);
if (!hps)
break;
// get the color bits
memset(pBMInfo, 0, cbBMInfo);
*((PBITMAPINFOHEADER2)pBMInfo) = BMHeader;
GpiSetBitmap(hps, IconInfo.hbmColor);
if (GpiQueryBitmapBits(hps, 0L, (LONG)BMHeader.cy,
(BYTE*)pInBuf, pBMInfo) <= 0)
break;
// The first 2 bytes are the width & height of the icon in pixels,
// the remaining bytes are BGRA32 (B in first byte, A in last)
uint8_t* outPtr = pOutBuf;
*outPtr++ = (uint8_t)cxOut;
*outPtr++ = (uint8_t)cyOut;
// convert the color bitmap
pBMInfo->cbImage = cbInBuf;
ConvertColorBitMap(pInBuf, pBMInfo, outPtr, fShrink);
// now we need to tack on the alpha data, so jump back to the first
// pixel in the output buffer
outPtr = pOutBuf+2;
// Get the mask info
BMHeader.cbFix = sizeof(BMHeader);
if (!GpiQueryBitmapInfoHeader(IconInfo.hbmPointer, &BMHeader))
break;
// if the existing input buffer isn't large enough, reallocate it
cbInRow = ALIGNEDBPR(BMHeader.cx, BMHeader.cBitCount);
if ((cbInRow * BMHeader.cy) > cbInBuf) // Need more for mask
{
cbInBuf = cbInRow * BMHeader.cy;
nsMemory::Free(pInBuf);
pInBuf = (uint8_t*)nsMemory::Alloc(cbInBuf);
memset(pInBuf, 0, cbInBuf);
}
// get the mask/alpha bits
memset(pBMInfo, 0, cbBMInfo);
*((PBITMAPINFOHEADER2)pBMInfo) = BMHeader;
GpiSetBitmap(hps, IconInfo.hbmPointer);
if (GpiQueryBitmapBits(hps, 0L, (LONG)BMHeader.cy,
(BYTE*)pInBuf, pBMInfo) <= 0)
break;
// convert the mask/alpha bitmap
pBMInfo->cbImage = cbInBuf;
ConvertMaskBitMap(pInBuf, pBMInfo, outPtr, fShrink);
// create a pipe
nsCOMPtr<nsIInputStream> inStream;
nsCOMPtr<nsIOutputStream> outStream;
rv = NS_NewPipe(getter_AddRefs(inStream), getter_AddRefs(outStream),
cbOutBuf, cbOutBuf, nonBlocking);
if (NS_FAILED(rv))
break;
// put our data into the pipe
uint32_t written;
rv = outStream->Write(reinterpret_cast<const char*>(pOutBuf),
cbOutBuf, &written);
if (NS_FAILED(rv))
break;
// success! so addref the pipe
NS_ADDREF(*_retval = inStream);
} while (0);
// free all the resources we allocated
if (pOutBuf)
nsMemory::Free(pOutBuf);
if (pInBuf)
nsMemory::Free(pInBuf);
if (pBMInfo)
nsMemory::Free(pBMInfo);
if (hps) {
GpiAssociate(hps, NULLHANDLE);
GpiDestroyPS(hps);
}
if (hdc)
DevCloseDC(hdc);
if (hIcon)
DestroyIcon(hIcon, fWpsIcon);
return rv;
}
//------------------------------------------------------------------------
// get the file's icon from either the WPS or PM
static HPOINTER GetIcon(nsCString& file, bool fExists,
bool fMini, bool *fWpsIcon)
{
HPOINTER hRtn = 0;
*fWpsIcon = false;
if (file.IsEmpty()) {
// append something so that we get at least the generic icon
file.Append("pmwrlw");
}
// if RWS is enabled, try to get the icon from the WPS
if (sUseRws) {
nsCOMPtr<nsIRwsService> rwsSvc(do_GetService("@mozilla.org/rwsos2;1"));
if (!rwsSvc)
sUseRws = false;
else {
if (fExists) {
rwsSvc->IconFromPath(file.get(), false, fMini, (uint32_t*)&hRtn);
} else {
const char *ptr = file.get();
if (*ptr == '.')
ptr++;
rwsSvc->IconFromExtension(ptr, fMini, (uint32_t*)&hRtn);
}
}
}
// if we got an icon from the WPS, set the flag & exit
if (hRtn) {
*fWpsIcon = true;
return hRtn;
}
// if the file exists already, get its icon
if (fExists)
return WinLoadFileIcon(file.get(), FALSE);
// otherwise, create a temporary file with the correct extension,
// then retrieve whatever icon PM assigns it
if (file.First() == '.')
file.Insert("moztmp", 0);
nsCOMPtr<nsIFile> tempPath;
if (NS_FAILED(NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(tempPath))) ||
NS_FAILED(tempPath->AppendNative(file)))
return 0;
nsAutoCString pathStr;
tempPath->GetNativePath(pathStr);
FILE* fp = fopen(pathStr.get(), "wb+");
if (fp) {
fclose(fp);
hRtn = WinLoadFileIcon(pathStr.get(), FALSE);
remove(pathStr.get());
}
return hRtn;
}
//------------------------------------------------------------------------
static void DestroyIcon(HPOINTER hIcon, bool fWpsIcon)
{
if (fWpsIcon)
WinDestroyPointer(hIcon);
else
WinFreeFileIcon(hIcon);
return;
}
//------------------------------------------------------------------------
// converts 16, 256, & 16M color bitmaps to BGRA32 format; the alpha
// channel byte is left open & will be filled in by ConvertMaskBitMap();
// since the scanlines in OS/2 bitmaps run bottom-to-top, it starts at the
// end of the input buffer & works its way back; Note: only 4-bit, 20x20
// icons contain input padding that has to be ignored
void ConvertColorBitMap(uint8_t *inBuf, PBITMAPINFO2 pBMInfo,
uint8_t *outBuf, bool fShrink)
{
uint32_t next = fShrink ? 2 : 1;
uint32_t bprIn = ALIGNEDBPR(pBMInfo->cx, pBMInfo->cBitCount);
uint8_t *pIn = inBuf + (pBMInfo->cy - 1) * bprIn;
uint8_t *pOut = outBuf;
PRGB2 pColorTable = &pBMInfo->argbColor[0];
if (pBMInfo->cBitCount == 4) {
uint32_t ubprIn = UNALIGNEDBPR(pBMInfo->cx, pBMInfo->cBitCount);
uint32_t padIn = bprIn - ubprIn;
for (uint32_t row = pBMInfo->cy; row > 0; row -= next) {
for (uint32_t ndx = 0; ndx < ubprIn; ndx++, pIn++) {
pOut = 4 + (uint8_t*)memcpy(pOut, &pColorTable[FIRSTPEL(*pIn)], 3);
if (!fShrink) {
pOut = 4 + (uint8_t*)memcpy(pOut, &pColorTable[SECONDPEL(*pIn)], 3);
}
}
pIn -= ((next + 1) * bprIn) - padIn;
}
} else if (pBMInfo->cBitCount == 8) {
for (uint32_t row = pBMInfo->cy; row > 0; row -= next) {
for (uint32_t ndx = 0; ndx < bprIn; ndx += next, pIn += next) {
pOut = 4 + (uint8_t*)memcpy(pOut, &pColorTable[*pIn], 3);
}
pIn -= (next + 1) * bprIn;
}
} else if (pBMInfo->cBitCount == 24) {
uint32_t next3 = next * 3;
for (uint32_t row = pBMInfo->cy; row > 0; row -= next) {
for (uint32_t ndx = 0; ndx < bprIn; ndx += next3, pIn += next3) {
pOut = 4 + (uint8_t*)memcpy(pOut, pIn, 3);
}
pIn -= (next + 1) * bprIn;
}
}
}
//------------------------------------------------------------------------
// converts an icon's AND mask into 8-bit alpha data and stores it in the
// high-order bytes of the BGRA32 bitmap created by ConvertColorBitMap();
// the AND mask is the 2nd half of a pair of bitmaps & the scanlines run
// bottom-to-top - starting at the end and working back to the midpoint
// converts the entire bitmap; since each row is dword-aligned, 16, 20,
// and 40-pixel icons all have padding bits at the end of every row that
// must be skipped over
void ConvertMaskBitMap(uint8_t *inBuf, PBITMAPINFO2 pBMInfo,
uint8_t *outBuf, bool fShrink)
{
uint32_t next = (fShrink ? 2 : 1);
uint32_t bprIn = ALIGNEDBPR(pBMInfo->cx, pBMInfo->cBitCount);
uint32_t padIn = bprIn - UNALIGNEDBPR(pBMInfo->cx, pBMInfo->cBitCount);
uint8_t *pIn = inBuf + (pBMInfo->cy - 1) * bprIn;
uint8_t *pOut = outBuf + 3;
// for each row or every other row
for (uint32_t row = pBMInfo->cy/2; row > 0; row -= next) {
// for all of the non-padding bits in the row
for (uint32_t bits = pBMInfo->cx; bits; pIn++) {
uint8_t src = ~(*pIn);
uint8_t srcMask = 0x80;
// for each bit or every other bit in the current byte
for ( ; srcMask && bits; srcMask >>= next, bits -= next, pOut += 4) {
if (src & srcMask) {
*pOut = 0xff;
}
}
}
// if the row just completed had padding, pIn won't be pointing
// at the first byte in the next row; padIn compensates for this
pIn -= ((next + 1) * bprIn) - padIn;
}
}
//------------------------------------------------------------------------
NS_IMETHODIMP nsIconChannel::GetContentType(nsACString &aContentType)
{
aContentType.AssignLiteral("image/icon");
return NS_OK;
}
NS_IMETHODIMP
nsIconChannel::SetContentType(const nsACString &aContentType)
{
// It doesn't make sense to set the content-type on this type
// of channel...
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP nsIconChannel::GetContentCharset(nsACString &aContentCharset)
{
aContentCharset.Truncate();
return NS_OK;
}
NS_IMETHODIMP
nsIconChannel::SetContentCharset(const nsACString &aContentCharset)
{
// It doesn't make sense to set the content-charset on this type
// of channel...
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsIconChannel::GetContentDisposition(uint32_t *aContentDisposition)
{
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsIconChannel::SetContentDisposition(uint32_t aContentDisposition)
{
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsIconChannel::GetContentDispositionFilename(nsAString &aContentDispositionFilename)
{
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsIconChannel::SetContentDispositionFilename(const nsAString &aContentDispositionFilename)
{
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP
nsIconChannel::GetContentDispositionHeader(nsACString &aContentDispositionHeader)
{
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHODIMP nsIconChannel::GetContentLength(int32_t *aContentLength)
{
*aContentLength = mContentLength;
return NS_OK;
}
NS_IMETHODIMP nsIconChannel::SetContentLength(int32_t aContentLength)
{
NS_NOTREACHED("nsIconChannel::SetContentLength");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsIconChannel::GetOwner(nsISupports* *aOwner)
{
*aOwner = mOwner.get();
NS_IF_ADDREF(*aOwner);
return NS_OK;
}
NS_IMETHODIMP nsIconChannel::SetOwner(nsISupports* aOwner)
{
mOwner = aOwner;
return NS_OK;
}
NS_IMETHODIMP nsIconChannel::GetNotificationCallbacks(nsIInterfaceRequestor* *aNotificationCallbacks)
{
*aNotificationCallbacks = mCallbacks.get();
NS_IF_ADDREF(*aNotificationCallbacks);
return NS_OK;
}
NS_IMETHODIMP nsIconChannel::SetNotificationCallbacks(nsIInterfaceRequestor* aNotificationCallbacks)
{
mCallbacks = aNotificationCallbacks;
return NS_OK;
}
NS_IMETHODIMP nsIconChannel::GetSecurityInfo(nsISupports * *aSecurityInfo)
{
*aSecurityInfo = nullptr;
return NS_OK;
}
// nsIRequestObserver methods
NS_IMETHODIMP nsIconChannel::OnStartRequest(nsIRequest* aRequest, nsISupports* aContext)
{
if (mListener)
return mListener->OnStartRequest(this, aContext);
return NS_OK;
}
NS_IMETHODIMP nsIconChannel::OnStopRequest(nsIRequest* aRequest, nsISupports* aContext, nsresult aStatus)
{
if (mListener) {
mListener->OnStopRequest(this, aContext, aStatus);
mListener = nullptr;
}
// Remove from load group
if (mLoadGroup)
mLoadGroup->RemoveRequest(this, nullptr, aStatus);
// Drop notification callbacks to prevent cycles.
mCallbacks = nullptr;
return NS_OK;
}
//------------------------------------------------------------------------
// nsIStreamListener methods
NS_IMETHODIMP nsIconChannel::OnDataAvailable(nsIRequest* aRequest,
nsISupports* aContext,
nsIInputStream* aStream,
uint64_t aOffset,
uint32_t aCount)
{
if (mListener)
return mListener->OnDataAvailable(this, aContext, aStream, aOffset, aCount);
return NS_OK;
}
//------------------------------------------------------------------------
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