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Bug 460969 - Fix image from clipboard code; r=netzen

This commit is contained in:
Eddy Bruel 2012-07-31 14:47:18 +02:00
Родитель 7fa33d3d7e
Коммит 3600f06313
1 изменённых файлов: 38 добавлений и 27 удалений
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65
widget/windows/nsImageClipboard.cpp
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@ -194,33 +194,31 @@ nsImageFromClipboard ::GetEncodedImageStream (unsigned char * aClipboardData, co
// neg. heights mean the Y axis is inverted and we don't handle that case
NS_ENSURE_TRUE(height > 0, NS_ERROR_FAILURE);
unsigned char * rgbData = new unsigned char[width * height * 3 /* RGB */];
static mozilla::fallible_t fallible = mozilla::fallible_t();
unsigned char * rgbaData = new (fallible) unsigned char[width * height * 4 /* RGBA */];
if (!rgbaData)
return NS_ERROR_OUT_OF_MEMORY;
if (rgbData) {
BYTE * pGlobal = (BYTE *) aClipboardData;
// Convert the clipboard image into RGB packed pixel data
rv = ConvertColorBitMap((unsigned char *) (pGlobal + header->bmiHeader.biSize), header, rgbData);
// if that succeeded, encode the bitmap as aMIMEFormat data. Don't return early or we risk leaking rgbData
if (NS_SUCCEEDED(rv)) {
nsCAutoString encoderCID(NS_LITERAL_CSTRING("@mozilla.org/image/encoder;2?type="));
// Map image/jpg to image/jpeg (which is how the encoder is registered).
if (strcmp(aMIMEFormat, kJPGImageMime) == 0)
encoderCID.Append("image/jpeg");
else
encoderCID.Append(aMIMEFormat);
nsCOMPtr<imgIEncoder> encoder = do_CreateInstance(encoderCID.get(), &rv);
if (NS_SUCCEEDED(rv)){
rv = encoder->InitFromData(rgbData, 0, width, height, 3 * width /* RGB * # pixels in a row */,
imgIEncoder::INPUT_FORMAT_RGB, EmptyString());
if (NS_SUCCEEDED(rv))
encoder->QueryInterface(NS_GET_IID(nsIInputStream), (void **) aInputStream);
}
BYTE * pGlobal = (BYTE *) aClipboardData;
// Convert the clipboard image into RGB packed pixel data
rv = ConvertColorBitMap((unsigned char *) (pGlobal + header->bmiHeader.biSize), header, rgbaData);
// if that succeeded, encode the bitmap as aMIMEFormat data. Don't return early or we risk leaking rgbData
if (NS_SUCCEEDED(rv)) {
nsCAutoString encoderCID(NS_LITERAL_CSTRING("@mozilla.org/image/encoder;2?type="));
// Map image/jpg to image/jpeg (which is how the encoder is registered).
if (strcmp(aMIMEFormat, kJPEGImageMime) == 0)
encoderCID.Append("image/jpeg");
else
encoderCID.Append(aMIMEFormat);
nsCOMPtr<imgIEncoder> encoder = do_CreateInstance(encoderCID.get(), &rv);
if (NS_SUCCEEDED(rv)){
rv = encoder->InitFromData(rgbaData, 0, width, height, 4 * width /* RGBA * # pixels in a row */,
imgIEncoder::INPUT_FORMAT_RGBA, EmptyString());
if (NS_SUCCEEDED(rv))
encoder->QueryInterface(NS_GET_IID(nsIInputStream), (void **) aInputStream);
}
delete [] rgbData;
}
else
rv = NS_ERROR_OUT_OF_MEMORY;
}
delete[] rgbaData;
return rv;
} // GetImage
@ -257,7 +255,7 @@ nsImageFromClipboard::InvertRows(unsigned char * aInitialBuffer, PRUint32 aSizeO
//
// ConvertColorBitMap
//
// Takes the clipboard bitmap and converts it into a RGB packed pixel values.
// Takes the clipboard bitmap and converts it into a RGBA packed pixel values.
//
nsresult
nsImageFromClipboard::ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPINFO pBitMapInfo, unsigned char * aOutBuffer)
@ -324,6 +322,7 @@ nsImageFromClipboard::ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPIN
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[colorTableEntry].rgbRed;
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[colorTableEntry].rgbGreen;
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[colorTableEntry].rgbBlue;
aOutBuffer[writeIndex++] = 0xFF;
numPixelsLeftInRow--;
}
pos += 1;
@ -336,6 +335,7 @@ nsImageFromClipboard::ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPIN
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[colorTableEntry].rgbRed;
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[colorTableEntry].rgbGreen;
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[colorTableEntry].rgbBlue;
aOutBuffer[writeIndex++] = 0xFF;
numPixelsLeftInRow--;
if (numPixelsLeftInRow) // now read the second pixel
@ -344,6 +344,7 @@ nsImageFromClipboard::ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPIN
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[colorTableEntry].rgbRed;
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[colorTableEntry].rgbGreen;
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[colorTableEntry].rgbBlue;
aOutBuffer[writeIndex++] = 0xFF;
numPixelsLeftInRow--;
}
pos += 1;
@ -353,6 +354,7 @@ nsImageFromClipboard::ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPIN
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[aInputBuffer[index]].rgbRed;
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[aInputBuffer[index]].rgbGreen;
aOutBuffer[writeIndex++] = pBitMapInfo->bmiColors[aInputBuffer[index]].rgbBlue;
aOutBuffer[writeIndex++] = 0xFF;
numPixelsLeftInRow--;
pos += 1;
break;
@ -371,6 +373,7 @@ nsImageFromClipboard::ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPIN
aOutBuffer[writeIndex++] = redValue;
aOutBuffer[writeIndex++] = greenValue;
aOutBuffer[writeIndex++] = blueValue;
aOutBuffer[writeIndex++] = 0xFF;
numPixelsLeftInRow--;
pos += 2;
}
@ -383,14 +386,22 @@ nsImageFromClipboard::ConvertColorBitMap(unsigned char * aInputBuffer, PBITMAPIN
aOutBuffer[writeIndex++] = (val & colorMasks.red) >> colorMasks.redRightShift << colorMasks.redLeftShift;
aOutBuffer[writeIndex++] = (val & colorMasks.green) >> colorMasks.greenRightShift << colorMasks.greenLeftShift;
aOutBuffer[writeIndex++] = (val & colorMasks.blue) >> colorMasks.blueRightShift << colorMasks.blueLeftShift;
aOutBuffer[writeIndex++] = 0xFF;
numPixelsLeftInRow--;
// If biCompression == BI_BITFIELDS, bpp != 24, since BI_BITFIELDS
// only supports 16 and 32 bpp. Hence, bpp == 32, and we can always
// read 4 bytes here.
pos += 4; // we read in 4 bytes of data in order to process this pixel
}
else
{
aOutBuffer[writeIndex++] = aInputBuffer[index+2];
aOutBuffer[writeIndex++] = aInputBuffer[index+1];
aOutBuffer[writeIndex++] = aInputBuffer[index+1];
aOutBuffer[writeIndex++] = aInputBuffer[index];
if (bytesPerPixel > 3)
aOutBuffer[writeIndex++] = aInputBuffer[index+3];
else
aOutBuffer[writeIndex++] = 0xFF;
numPixelsLeftInRow--;
pos += bytesPerPixel; // 3 bytes for 24 bit data, 4 bytes for 32 bit data (we skip over the 4th byte)...
}