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-rw-r--r--vcl/source/gdi/pngread.cxx228
1 files changed, 114 insertions, 114 deletions
diff --git a/vcl/source/gdi/pngread.cxx b/vcl/source/gdi/pngread.cxx
index 990f5d4cdc9a..9e27f79541d1 100644
--- a/vcl/source/gdi/pngread.cxx
+++ b/vcl/source/gdi/pngread.cxx
@@ -2,7 +2,7 @@
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
+ *
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
@@ -46,24 +46,24 @@
// - Defines -
// -----------
-#define PNGCHUNK_IHDR 0x49484452
-#define PNGCHUNK_PLTE 0x504c5445
-#define PNGCHUNK_IDAT 0x49444154
-#define PNGCHUNK_IEND 0x49454e44
-#define PNGCHUNK_bKGD 0x624b4744
-#define PNGCHUNK_cHRM 0x6348524d
-#define PNGCHUNK_gAMA 0x67414d41
-#define PNGCHUNK_hIST 0x68495354
-#define PNGCHUNK_pHYs 0x70485973
-#define PNGCHUNK_sBIT 0x73425420
-#define PNGCHUNK_tIME 0x74494d45
-#define PNGCHUNK_tEXt 0x74455874
-#define PNGCHUNK_tRNS 0x74524e53
-#define PNGCHUNK_zTXt 0x7a545874
-#define PMGCHUNG_msOG 0x6d734f47 // Microsoft Office Animated GIF
-
-#define VIEWING_GAMMA 2.35
-#define DISPLAY_GAMMA 1.0
+#define PNGCHUNK_IHDR 0x49484452
+#define PNGCHUNK_PLTE 0x504c5445
+#define PNGCHUNK_IDAT 0x49444154
+#define PNGCHUNK_IEND 0x49454e44
+#define PNGCHUNK_bKGD 0x624b4744
+#define PNGCHUNK_cHRM 0x6348524d
+#define PNGCHUNK_gAMA 0x67414d41
+#define PNGCHUNK_hIST 0x68495354
+#define PNGCHUNK_pHYs 0x70485973
+#define PNGCHUNK_sBIT 0x73425420
+#define PNGCHUNK_tIME 0x74494d45
+#define PNGCHUNK_tEXt 0x74455874
+#define PNGCHUNK_tRNS 0x74524e53
+#define PNGCHUNK_zTXt 0x7a545874
+#define PMGCHUNG_msOG 0x6d734f47 // Microsoft Office Animated GIF
+
+#define VIEWING_GAMMA 2.35
+#define DISPLAY_GAMMA 1.0
namespace vcl
{
@@ -74,7 +74,7 @@ namespace vcl
// ------------------------------------------------------------------------------
static const BYTE mpDefaultColorTable[ 256 ] =
-{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+{ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
@@ -106,17 +106,17 @@ private:
std::vector< vcl::PNGReader::ChunkData >::iterator maChunkIter;
std::vector< sal_uInt8 >::iterator maDataIter;
- Bitmap* mpBmp;
- BitmapWriteAccess* mpAcc;
- Bitmap* mpMaskBmp;
- AlphaMask* mpAlphaMask;
- BitmapWriteAccess* mpMaskAcc;
- ZCodec* mpZCodec;
- BYTE* mpInflateInBuf; // as big as the size of a scanline + alphachannel + 1
- BYTE* mpScanPrior; // pointer to the latest scanline
- BYTE* mpTransTab; // for transparency in images with palette colortype
- BYTE* mpScanCurrent; // pointer into the current scanline
- BYTE* mpColorTable; //
+ Bitmap* mpBmp;
+ BitmapWriteAccess* mpAcc;
+ Bitmap* mpMaskBmp;
+ AlphaMask* mpAlphaMask;
+ BitmapWriteAccess* mpMaskAcc;
+ ZCodec* mpZCodec;
+ BYTE* mpInflateInBuf; // as big as the size of a scanline + alphachannel + 1
+ BYTE* mpScanPrior; // pointer to the latest scanline
+ BYTE* mpTransTab; // for transparency in images with palette colortype
+ BYTE* mpScanCurrent; // pointer into the current scanline
+ BYTE* mpColorTable; //
sal_Size mnStreamSize; // estimate of PNG file size
sal_uInt32 mnChunkType; // Type of current PNG chunk
sal_Int32 mnChunkLen; // Length of current PNG chunk
@@ -132,29 +132,29 @@ private:
sal_uInt32 mnYAdd; // the increment for input images Y coords for the current pass
int mnPreviewShift; // shift to convert orig image coords into preview image coords
int mnPreviewMask; // == ((1 << mnPreviewShift) - 1)
- USHORT mnIStmOldMode;
- USHORT mnTargetDepth; // pixel depth of target bitmap
- BYTE mnTransRed;
- BYTE mnTransGreen;
- BYTE mnTransBlue;
- BYTE mnPngDepth; // pixel depth of PNG data
- BYTE mnColorType;
- BYTE mnCompressionType;
- BYTE mnFilterType;
- BYTE mnInterlaceType;
- BitmapColor mcTranspColor; // transparency mask's transparency "color"
- BitmapColor mcOpaqueColor; // transparency mask's opaque "color"
- BOOL mbTransparent; // graphic includes an tRNS Chunk or an alpha Channel
- BOOL mbAlphaChannel; // is true for ColorType 4 and 6
- BOOL mbRGBTriple;
- BOOL mbPalette; // FALSE if we need a Palette
- BOOL mbGrayScale;
- BOOL mbzCodecInUse;
- BOOL mbStatus;
- BOOL mbIDAT; // TRUE if finished with enough IDAT chunks
- BOOL mbGamma; // TRUE if Gamma Correction available
- BOOL mbpHYs; // TRUE if pysical size of pixel available
- sal_Bool mbIgnoreGammaChunk;
+ USHORT mnIStmOldMode;
+ USHORT mnTargetDepth; // pixel depth of target bitmap
+ BYTE mnTransRed;
+ BYTE mnTransGreen;
+ BYTE mnTransBlue;
+ BYTE mnPngDepth; // pixel depth of PNG data
+ BYTE mnColorType;
+ BYTE mnCompressionType;
+ BYTE mnFilterType;
+ BYTE mnInterlaceType;
+ BitmapColor mcTranspColor; // transparency mask's transparency "color"
+ BitmapColor mcOpaqueColor; // transparency mask's opaque "color"
+ BOOL mbTransparent; // graphic includes an tRNS Chunk or an alpha Channel
+ BOOL mbAlphaChannel; // is true for ColorType 4 and 6
+ BOOL mbRGBTriple;
+ BOOL mbPalette; // FALSE if we need a Palette
+ BOOL mbGrayScale;
+ BOOL mbzCodecInUse;
+ BOOL mbStatus;
+ BOOL mbIDAT; // TRUE if finished with enough IDAT chunks
+ BOOL mbGamma; // TRUE if Gamma Correction available
+ BOOL mbpHYs; // TRUE if pysical size of pixel available
+ sal_Bool mbIgnoreGammaChunk;
bool ReadNextChunk();
void ReadRemainingChunks();
@@ -164,19 +164,19 @@ private:
void ImplSetPixel( sal_uInt32 y, sal_uInt32 x, BYTE nPalIndex );
void ImplSetTranspPixel( sal_uInt32 y, sal_uInt32 x, const BitmapColor &, BOOL bTrans );
void ImplSetAlphaPixel( sal_uInt32 y, sal_uInt32 x, BYTE nPalIndex, BYTE nAlpha );
- void ImplSetAlphaPixel( sal_uInt32 y, sal_uInt32 x, const BitmapColor&, BYTE nAlpha );
- void ImplReadIDAT();
+ void ImplSetAlphaPixel( sal_uInt32 y, sal_uInt32 x, const BitmapColor&, BYTE nAlpha );
+ void ImplReadIDAT();
bool ImplPreparePass();
void ImplApplyFilter();
void ImplDrawScanline( sal_uInt32 nXStart, sal_uInt32 nXAdd );
- BOOL ImplReadTransparent();
- void ImplGetGamma();
- void ImplGetBackground();
- BYTE ImplScaleColor();
- BOOL ImplReadHeader( const Size& rPreviewSizeHint );
- BOOL ImplReadPalette();
- void ImplGetGrayPalette( sal_uInt16 );
- sal_uInt32 ImplReadsal_uInt32();
+ BOOL ImplReadTransparent();
+ void ImplGetGamma();
+ void ImplGetBackground();
+ BYTE ImplScaleColor();
+ BOOL ImplReadHeader( const Size& rPreviewSizeHint );
+ BOOL ImplReadPalette();
+ void ImplGetGrayPalette( sal_uInt16 );
+ sal_uInt32 ImplReadsal_uInt32();
public:
@@ -185,29 +185,29 @@ public:
BitmapEx GetBitmapEx( const Size& rPreviewSizeHint );
const std::vector< PNGReader::ChunkData >& GetAllChunks();
- void SetIgnoreGammaChunk( sal_Bool bIgnore ){ mbIgnoreGammaChunk = bIgnore; };
+ void SetIgnoreGammaChunk( sal_Bool bIgnore ){ mbIgnoreGammaChunk = bIgnore; };
};
// ------------------------------------------------------------------------------
PNGReaderImpl::PNGReaderImpl( SvStream& rPNGStream )
: mrPNGStream( rPNGStream ),
- mpBmp ( NULL ),
- mpAcc ( NULL ),
- mpMaskBmp ( NULL ),
- mpAlphaMask ( NULL ),
- mpMaskAcc ( NULL ),
- mpZCodec ( new ZCodec( DEFAULT_IN_BUFSIZE, DEFAULT_OUT_BUFSIZE, MAX_MEM_USAGE ) ),
- mpInflateInBuf ( NULL ),
- mpScanPrior ( NULL ),
- mpTransTab ( NULL ),
- mpColorTable ( (sal_uInt8*) mpDefaultColorTable ),
- mbzCodecInUse ( sal_False ),
+ mpBmp ( NULL ),
+ mpAcc ( NULL ),
+ mpMaskBmp ( NULL ),
+ mpAlphaMask ( NULL ),
+ mpMaskAcc ( NULL ),
+ mpZCodec ( new ZCodec( DEFAULT_IN_BUFSIZE, DEFAULT_OUT_BUFSIZE, MAX_MEM_USAGE ) ),
+ mpInflateInBuf ( NULL ),
+ mpScanPrior ( NULL ),
+ mpTransTab ( NULL ),
+ mpColorTable ( (sal_uInt8*) mpDefaultColorTable ),
+ mbzCodecInUse ( sal_False ),
mbStatus( TRUE),
mbIDAT( FALSE ),
- mbGamma ( sal_False ),
- mbpHYs ( sal_False ),
- mbIgnoreGammaChunk ( sal_False )
+ mbGamma ( sal_False ),
+ mbpHYs ( sal_False ),
+ mbIgnoreGammaChunk ( sal_False )
{
// prepare the PNG data stream
mnOrigStreamMode = mrPNGStream.GetNumberFormatInt();
@@ -217,7 +217,7 @@ PNGReaderImpl::PNGReaderImpl( SvStream& rPNGStream )
maChunkSeq.reserve( 16 );
maChunkIter = maChunkSeq.begin();
- // estimate PNG file size (to allow sanity checks)
+ // estimate PNG file size (to allow sanity checks)
const sal_Size nStreamPos = mrPNGStream.Tell();
mrPNGStream.Seek( STREAM_SEEK_TO_END );
mnStreamSize = mrPNGStream.Tell();
@@ -382,8 +382,8 @@ BitmapEx PNGReaderImpl::GetBitmapEx( const Size& rPreviewSizeHint )
}
break;
- case PNGCHUNK_gAMA : // the gamma chunk must precede
- { // the 'IDAT' and also the 'PLTE'(if available )
+ case PNGCHUNK_gAMA : // the gamma chunk must precede
+ { // the 'IDAT' and also the 'PLTE'(if available )
if ( !mbIgnoreGammaChunk && ( mbIDAT == FALSE ) )
ImplGetGamma();
}
@@ -398,23 +398,23 @@ BitmapEx PNGReaderImpl::GetBitmapEx( const Size& rPreviewSizeHint )
case PNGCHUNK_tRNS :
{
- if ( !mbIDAT ) // the tRNS chunk must precede the IDAT
+ if ( !mbIDAT ) // the tRNS chunk must precede the IDAT
mbStatus = ImplReadTransparent();
}
break;
- case PNGCHUNK_bKGD : // the background chunk must appear
+ case PNGCHUNK_bKGD : // the background chunk must appear
{
- if ( ( mbIDAT == FALSE ) && mbPalette ) // before the 'IDAT' and after the
- ImplGetBackground(); // PLTE(if available ) chunk.
+ if ( ( mbIDAT == FALSE ) && mbPalette ) // before the 'IDAT' and after the
+ ImplGetBackground(); // PLTE(if available ) chunk.
}
break;
case PNGCHUNK_IDAT :
{
- if ( !mpInflateInBuf ) // taking care that the header has properly been read
+ if ( !mpInflateInBuf ) // taking care that the header has properly been read
mbStatus = FALSE;
- else if ( !mbIDAT ) // the gfx is finished, but there may be left a zlibCRC of about 4Bytes
+ else if ( !mbIDAT ) // the gfx is finished, but there may be left a zlibCRC of about 4Bytes
ImplReadIDAT();
}
break;
@@ -530,16 +530,16 @@ BOOL PNGReaderImpl::ImplReadHeader( const Size& rPreviewSizeHint )
// valid color types are 0,2,3,4 & 6
switch ( mnColorType )
{
- case 0 : // each pixel is a grayscale
+ case 0 : // each pixel is a grayscale
{
switch ( mnPngDepth )
{
case 2 : // 2bit target not available -> use four bits
- mnTargetDepth = 4; // we have to expand the bitmap
+ mnTargetDepth = 4; // we have to expand the bitmap
mbGrayScale = TRUE;
break;
case 16 :
- mnTargetDepth = 8; // we have to reduce the bitmap
+ mnTargetDepth = 8; // we have to reduce the bitmap
// fall through
case 1 :
case 4 :
@@ -552,13 +552,13 @@ BOOL PNGReaderImpl::ImplReadHeader( const Size& rPreviewSizeHint )
}
break;
- case 2 : // each pixel is an RGB triple
+ case 2 : // each pixel is an RGB triple
{
mbRGBTriple = TRUE;
nScansize64 *= 3;
switch ( mnPngDepth )
{
- case 16 : // we have to reduce the bitmap
+ case 16 : // we have to reduce the bitmap
case 8 :
mnTargetDepth = 24;
break;
@@ -568,12 +568,12 @@ BOOL PNGReaderImpl::ImplReadHeader( const Size& rPreviewSizeHint )
}
break;
- case 3 : // each pixel is a palette index
+ case 3 : // each pixel is a palette index
{
switch ( mnPngDepth )
{
case 2 :
- mnTargetDepth = 4; // we have to expand the bitmap
+ mnTargetDepth = 4; // we have to expand the bitmap
// fall through
case 1 :
case 4 :
@@ -586,14 +586,14 @@ BOOL PNGReaderImpl::ImplReadHeader( const Size& rPreviewSizeHint )
}
break;
- case 4 : // each pixel is a grayscale sample followed by an alpha sample
+ case 4 : // each pixel is a grayscale sample followed by an alpha sample
{
nScansize64 *= 2;
mbAlphaChannel = TRUE;
switch ( mnPngDepth )
{
case 16 :
- mnTargetDepth = 8; // we have to reduce the bitmap
+ mnTargetDepth = 8; // we have to reduce the bitmap
case 8 :
mbGrayScale = TRUE;
break;
@@ -603,14 +603,14 @@ BOOL PNGReaderImpl::ImplReadHeader( const Size& rPreviewSizeHint )
}
break;
- case 6 : // each pixel is an RGB triple followed by an alpha sample
+ case 6 : // each pixel is an RGB triple followed by an alpha sample
{
mbRGBTriple = TRUE;
nScansize64 *= 4;
mbAlphaChannel = TRUE;
switch (mnPngDepth )
{
- case 16 : // we have to reduce the bitmap
+ case 16 : // we have to reduce the bitmap
case 8 :
mnTargetDepth = 24;
break;
@@ -832,17 +832,17 @@ void PNGReaderImpl::ImplGetGamma()
if( mnChunkLen < 4 )
return;
- sal_uInt32 nGammaValue = ImplReadsal_uInt32();
- double fGamma = ( ( VIEWING_GAMMA / DISPLAY_GAMMA ) * ( (double)nGammaValue / 100000 ) );
- double fInvGamma = ( fGamma <= 0.0 || fGamma > 10.0 ) ? 1.0 : ( 1.0 / fGamma );
+ sal_uInt32 nGammaValue = ImplReadsal_uInt32();
+ double fGamma = ( ( VIEWING_GAMMA / DISPLAY_GAMMA ) * ( (double)nGammaValue / 100000 ) );
+ double fInvGamma = ( fGamma <= 0.0 || fGamma > 10.0 ) ? 1.0 : ( 1.0 / fGamma );
if ( fInvGamma != 1.0 )
{
mbGamma = TRUE;
-
+
if ( mpColorTable == mpDefaultColorTable )
mpColorTable = new sal_uInt8[ 256 ];
-
+
for ( sal_Int32 i = 0; i < 256; i++ )
mpColorTable[ i ] = (sal_uInt8)(pow((double)i/255.0, fInvGamma) * 255.0 + 0.5);
@@ -883,7 +883,7 @@ void PNGReaderImpl::ImplGetBackground()
}
}
break;
-
+
case 2 :
case 6 :
{
@@ -907,12 +907,12 @@ sal_uInt8 PNGReaderImpl::ImplScaleColor()
{
sal_uInt32 nMask = ( ( 1 << mnPngDepth ) - 1 );
sal_uInt16 nCol = ( *maDataIter++ << 8 );
-
+
nCol += *maDataIter++ & (sal_uInt16)nMask;
-
- if ( mnPngDepth > 8 ) // convert 16bit graphics to 8
+
+ if ( mnPngDepth > 8 ) // convert 16bit graphics to 8
nCol >>= 8;
-
+
return (sal_uInt8) nCol;
}
@@ -1205,7 +1205,7 @@ void PNGReaderImpl::ImplDrawScanline( sal_uInt32 nXStart, sal_uInt32 nXAdd )
{
if ( mbTransparent )
{
- if ( mnPngDepth == 4 ) // check if source has a two bit pixel format
+ if ( mnPngDepth == 4 ) // check if source has a two bit pixel format
{
for ( sal_Int32 nX = nXStart, nXIndex = 0; nX < maOrigSize.Width(); nX += nXAdd, ++nXIndex )
{
@@ -1254,7 +1254,7 @@ void PNGReaderImpl::ImplDrawScanline( sal_uInt32 nXStart, sal_uInt32 nXAdd )
}
else
{
- if ( mnPngDepth == 4 ) // maybe the source is a two bitmap graphic
+ if ( mnPngDepth == 4 ) // maybe the source is a two bitmap graphic
{ // BMP_FORMAT_4BIT_LSN_PAL
for ( sal_Int32 nX = nXStart, nXIndex = 0; nX < maOrigSize.Width(); nX += nXAdd, nXIndex++ )
{
@@ -1296,7 +1296,7 @@ void PNGReaderImpl::ImplDrawScanline( sal_uInt32 nXStart, sal_uInt32 nXAdd )
{
if ( mbAlphaChannel )
{
- if ( mnPngDepth == 8 ) // maybe the source is a 16 bit grayscale
+ if ( mnPngDepth == 8 ) // maybe the source is a 16 bit grayscale
{
for ( sal_Int32 nX = nXStart; nX < maOrigSize.Width(); nX += nXAdd, pTmp += 2 )
ImplSetAlphaPixel( nY, nX, pTmp[ 0 ], pTmp[ 1 ] );
@@ -1309,7 +1309,7 @@ void PNGReaderImpl::ImplDrawScanline( sal_uInt32 nXStart, sal_uInt32 nXAdd )
}
else if ( mbTransparent )
{
- if ( mnPngDepth == 8 ) // maybe the source is a 16 bit grayscale
+ if ( mnPngDepth == 8 ) // maybe the source is a 16 bit grayscale
{
for ( sal_Int32 nX = nXStart; nX < maOrigSize.Width(); nX += nXAdd, pTmp++ )
ImplSetAlphaPixel( nY, nX, *pTmp, mpTransTab[ *pTmp ] );
@@ -1322,7 +1322,7 @@ void PNGReaderImpl::ImplDrawScanline( sal_uInt32 nXStart, sal_uInt32 nXAdd )
}
else // neither alpha nor transparency
{
- if ( mnPngDepth == 8 ) // maybe the source is a 16 bit grayscale
+ if ( mnPngDepth == 8 ) // maybe the source is a 16 bit grayscale
{
if( nXAdd == 1 && mnPreviewShift == 0 ) // copy raw line data if possible
{
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-06 04:21:57 +0000