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bug 143046. Keep GIFs at original 8bit. patch from Alfred Kayser <alfredkayser@nl.ibm.com>. r=me sr=tor

This commit is contained in:
pavlov@pavlov.net 2007-11-07 13:33:57 -08:00
Родитель aea0c17588
Коммит e1b1fdcb68
8 изменённых файлов: 394 добавлений и 201 удалений
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14
gfx/idl/gfxIFormats.idl
Просмотреть файл

@ -97,4 +97,18 @@ interface gfxIFormats
* BGRA - packed RGBA image
*/
const gfx_format BGRA = 7;
/**
* PAL - Palette based image data, all opaque colors
* PRUint32 colormap[256];
* PRUint8 pixels[width*height];
*/
const gfx_format PAL = 8;
/**
* PAL_A1 - Palette based image data, with transparency
* PRUint32 colormap[256];
* PRUint8 pixels[width*height];
*/
const gfx_format PAL_A1 = 9;
};

7
gfx/idl/gfxIImageFrame.idl
Просмотреть файл

@ -57,7 +57,7 @@ native nsRectRef(nsIntRect &);
* @author Stuart Parmenter <pavlov@netscape.com>
* @version 0.1
*/
[scriptable, uuid(7292afa2-3b94-424d-97d5-51ce2f04c0fe)]
[scriptable, uuid(9c37930b-cadd-453c-89e1-9ed456715b9c)]
interface gfxIImageFrame : nsISupports
{
/**
@ -132,6 +132,11 @@ interface gfxIImageFrame : nsISupports
// XXX do we copy here? lets not...
void getImageData([array, size_is(length)] out PRUint8 bits, out unsigned long length);
/**
* Get Palette data pointer
*/
void getPaletteData([array, size_is(length)] out gfx_color palette, out unsigned long length);
/**
* Lock image pixels before addressing the data directly
*/

89
gfx/src/shared/gfxImageFrame.cpp
Просмотреть файл

@ -40,15 +40,17 @@
#include "gfxImageFrame.h"
#include "nsIServiceManager.h"
#include <limits.h>
#include "prmem.h"
NS_IMPL_ISUPPORTS2(gfxImageFrame, gfxIImageFrame, nsIInterfaceRequestor)
gfxImageFrame::gfxImageFrame() :
mInitialized(PR_FALSE),
mMutable(PR_TRUE),
mImageData(nsnull),
mTimeout(100),
mDisposalMethod(0), /* imgIContainer::kDisposeNotSpecified */
mBlendMethod(1) /* imgIContainer::kBlendOver */
mBlendMethod(1), /* imgIContainer::kBlendOver */
mInitialized(PR_FALSE),
mMutable(PR_TRUE)
{
/* member initializers and constructor code */
}
@ -56,6 +58,8 @@ gfxImageFrame::gfxImageFrame() :
gfxImageFrame::~gfxImageFrame()
{
/* destructor code */
PR_FREEIF(mImageData);
mInitialized = PR_FALSE;
}
/* void init (in PRInt32 aX, in PRInt32 aY, in PRInt32 aWidth, in PRInt32 aHeight, in gfx_format aFormat); */
@ -83,11 +87,6 @@ NS_IMETHODIMP gfxImageFrame::Init(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt3
return NS_ERROR_FAILURE;
}
if ( (aDepth != 8) && (aDepth != 24) ){
NS_ERROR("This Depth is not supported");
return NS_ERROR_FAILURE;
}
/* reject over-wide or over-tall images */
const PRInt32 k64KLimit = 0x0000FFFF;
if ( aWidth > k64KLimit || aHeight > k64KLimit ){
@ -103,17 +102,13 @@ NS_IMETHODIMP gfxImageFrame::Init(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt3
}
#endif
nsresult rv;
mOffset.MoveTo(aX, aY);
mSize.SizeTo(aWidth, aHeight);
mFormat = aFormat;
mDepth = aDepth;
mImage = do_CreateInstance("@mozilla.org/gfx/image;1", &rv);
NS_ASSERTION(mImage, "creation of image failed");
if (NS_FAILED(rv)) return rv;
PRBool needImage = PR_TRUE;
nsMaskRequirements maskReq;
switch (aFormat) {
@ -137,15 +132,37 @@ NS_IMETHODIMP gfxImageFrame::Init(PRInt32 aX, PRInt32 aY, PRInt32 aWidth, PRInt3
maskReq = nsMaskRequirements_kNeeds8Bit;
break;
default:
#ifdef DEBUG
printf("unsupported gfx_format\n");
#endif
case gfxIFormats::PAL:
case gfxIFormats::PAL_A1:
needImage = PR_FALSE;
break;
default:
NS_ERROR("unsupported gfx_format\n");
return NS_ERROR_FAILURE;
}
rv = mImage->Init(aWidth, aHeight, aDepth, maskReq);
if (NS_FAILED(rv)) return rv;
if (needImage) {
if (aDepth != 24) {
NS_ERROR("This Depth is not supported");
return NS_ERROR_FAILURE;
}
nsresult rv;
mImage = do_CreateInstance("@mozilla.org/gfx/image;1", &rv);
NS_ASSERTION(mImage, "creation of image failed");
if (NS_FAILED(rv)) return rv;
rv = mImage->Init(aWidth, aHeight, aDepth, maskReq);
NS_ENSURE_SUCCESS(rv, rv);
} else {
if ((aDepth < 1) || (aDepth > 8)) {
NS_ERROR("This Depth is not supported\n");
return NS_ERROR_FAILURE;
}
mImageData = (PRUint8*)PR_MALLOC(PaletteDataLength() + ImageDataLength());
NS_ENSURE_TRUE(mImageData, NS_ERROR_OUT_OF_MEMORY);
}
mInitialized = PR_TRUE;
return NS_OK;
@ -170,7 +187,7 @@ NS_IMETHODIMP gfxImageFrame::SetMutable(PRBool aMutable)
mMutable = aMutable;
if (!aMutable)
if (!aMutable && mImage)
mImage->Optimize(nsnull);
return NS_OK;
@ -245,6 +262,7 @@ NS_IMETHODIMP gfxImageFrame::GetNeedsBackground(PRBool *aNeedsBackground)
return NS_ERROR_NOT_INITIALIZED;
*aNeedsBackground = (mFormat != gfxIFormats::RGB &&
mFormat != gfxIFormats::PAL &&
mFormat != gfxIFormats::BGR) ||
!mImage->GetIsImageComplete();
return NS_OK;
@ -257,7 +275,7 @@ NS_IMETHODIMP gfxImageFrame::GetImageBytesPerRow(PRUint32 *aBytesPerRow)
if (!mInitialized)
return NS_ERROR_NOT_INITIALIZED;
*aBytesPerRow = mImage->GetLineStride();
*aBytesPerRow = mImage ? mImage->GetLineStride(): mSize.width;
return NS_OK;
}
@ -267,7 +285,7 @@ NS_IMETHODIMP gfxImageFrame::GetImageDataLength(PRUint32 *aBitsLength)
if (!mInitialized)
return NS_ERROR_NOT_INITIALIZED;
*aBitsLength = mImage->GetLineStride() * mSize.height;
*aBitsLength = ImageDataLength();
return NS_OK;
}
@ -277,8 +295,25 @@ NS_IMETHODIMP gfxImageFrame::GetImageData(PRUint8 **aData, PRUint32 *length)
if (!mInitialized)
return NS_ERROR_NOT_INITIALIZED;
*aData = mImage->GetBits();
*length = mImage->GetLineStride() * mSize.height;
NS_ASSERTION(mMutable, "trying to get data on an immutable frame");
*aData = mImage ? mImage->GetBits() : (mImageData + PaletteDataLength());
*length = ImageDataLength();
return NS_OK;
}
/* void getPaletteData ([array, size_is (length)] out PRUint32 palette, out unsigned long length); */
NS_IMETHODIMP gfxImageFrame::GetPaletteData(gfx_color **aPalette, PRUint32 *length)
{
if (!mInitialized)
return NS_ERROR_NOT_INITIALIZED;
if (!mImageData)
return NS_ERROR_FAILURE;
*aPalette = (gfx_color*)mImageData;
*length = PaletteDataLength();
return NS_OK;
}
@ -289,6 +324,8 @@ NS_IMETHODIMP gfxImageFrame::LockImageData()
if (!mInitialized)
return NS_ERROR_NOT_INITIALIZED;
if (!mImage)
return NS_OK;
return mImage->LockImagePixels(PR_FALSE);
}
@ -298,6 +335,8 @@ NS_IMETHODIMP gfxImageFrame::UnlockImageData()
if (!mInitialized)
return NS_ERROR_NOT_INITIALIZED;
if (!mImage)
return NS_OK;
return mImage->UnlockImagePixels(PR_FALSE);
}

18
gfx/src/shared/gfxImageFrame.h
Просмотреть файл

@ -71,14 +71,24 @@ protected:
nsIntSize mSize;
private:
nsCOMPtr<nsIImage> mImage;
PRUint32 PaletteDataLength() const {
return ((1 << mDepth) * sizeof(gfx_color));
}
PRPackedBool mInitialized;
PRPackedBool mMutable;
gfx_format mFormat;
PRUint32 ImageDataLength() const {
return (mImage ? mImage->GetLineStride() : mSize.width) * mSize.height;
}
nsCOMPtr<nsIImage> mImage;
PRUint8* mImageData;
PRInt32 mTimeout; // -1 means display forever
nsIntPoint mOffset;
PRInt32 mDisposalMethod;
gfx_format mFormat;
gfx_depth mDepth;
PRInt8 mBlendMethod;
PRPackedBool mInitialized;
PRPackedBool mMutable;
};

4
modules/libpr0n/decoders/gif/GIF2.h
Просмотреть файл

@ -102,7 +102,7 @@ typedef struct gif_struct {
int ipass; /* Interlace pass; Ranges 1-4 if interlaced. */
PRUintn rows_remaining; /* Rows remaining to be output */
PRUintn irow; /* Current output row, starting at zero */
PRUint32 *rowp; /* Current output pointer */
PRUint8 *rowp; /* Current output pointer */
/* Parameters for image frame currently being decoded*/
PRUintn x_offset, y_offset; /* With respect to "screen" origin */
@ -118,7 +118,7 @@ typedef struct gif_struct {
int version; /* Either 89 for GIF89 or 87 for GIF87 */
PRUintn screen_width; /* Logical screen width & height */
PRUintn screen_height;
PRUint32 global_colormap_size; /* Size of global colormap array. */
PRUint32 global_colormap_depth; /* Depth of global colormap array. */
int images_decoded; /* Counts images for multi-part GIFs */
int loop_count; /* Netscape specific extension block to control
the number of animation loops a GIF renders. */

195
modules/libpr0n/decoders/gif/nsGIFDecoder2.cpp
Просмотреть файл

@ -93,7 +93,7 @@ mailing address.
*
* Note, the hold will never need to be bigger than 256 bytes to gather up in the hold,
* as each GIF block (except colormaps) can never be bigger than 256 bytes.
* Colormaps are directly copied in the resp. global_colormap or dynamically allocated local_colormap.
* Colormaps are directly copied in the resp. global_colormap or the local_colormap of the PAL image frame
* So a fixed buffer in gif_struct is good enough.
* This buffer is only needed to copy left-over data from one GifWrite call to the next
*/
@ -242,7 +242,8 @@ nsresult nsGIFDecoder2::ProcessData(unsigned char *data, PRUint32 count, PRUint3
nsresult rv = GifWrite(data, count);
NS_ENSURE_SUCCESS(rv, rv);
if (mImageFrame) {
// Flushing is only needed for first frame
if (!mGIFStruct.images_decoded && mImageFrame) {
FlushImageData();
mLastFlushedRow = mCurrentRow;
mLastFlushedPass = mCurrentPass;
@ -313,7 +314,7 @@ void nsGIFDecoder2::EndGIF()
}
//******************************************************************************
void nsGIFDecoder2::BeginImageFrame()
void nsGIFDecoder2::BeginImageFrame(gfx_depth aDepth)
{
mImageFrame = nsnull; // clear out our current frame reference
@ -329,16 +330,23 @@ void nsGIFDecoder2::BeginImageFrame()
}
}
gfx_format format = gfxIFormats::RGB;
if (mGIFStruct.is_transparent) {
format = gfxIFormats::RGB_A1; // XXX not really
// Use correct format, RGB for first frame, PAL for following frames
// and include transparency to allow for optimization of opaque images
gfx_format format;
if (mGIFStruct.images_decoded) {
// Image data is stored with original depth and palette
format = mGIFStruct.is_transparent ? gfxIFormats::PAL_A1 : gfxIFormats::PAL;
} else {
// Regardless of depth of input, image is decoded into 24bit RGB
format = mGIFStruct.is_transparent ? gfxIFormats::RGB_A1 : gfxIFormats::RGB;
aDepth = 24;
}
// initialize the frame and append it to the container
mImageFrame = do_CreateInstance("@mozilla.org/gfx/image/frame;2");
if (!mImageFrame || NS_FAILED(mImageFrame->Init(
mGIFStruct.x_offset, mGIFStruct.y_offset,
mGIFStruct.width, mGIFStruct.height, format, 24))) {
mGIFStruct.width, mGIFStruct.height, format, aDepth))) {
mImageFrame = 0;
return;
}
@ -350,7 +358,7 @@ void nsGIFDecoder2::BeginImageFrame()
mObserver->OnStartFrame(nsnull, mImageFrame);
PRUint32 imageDataLength;
mImageFrame->GetImageData((PRUint8 **)&mImageData, &imageDataLength);
mImageFrame->GetImageData(&mImageData, &imageDataLength);
}
@ -358,11 +366,10 @@ void nsGIFDecoder2::BeginImageFrame()
void nsGIFDecoder2::EndImageFrame()
{
// First flush all pending image data
FlushImageData();
mCurrentRow = mLastFlushedRow = -1;
mCurrentPass = mLastFlushedPass = 0;
if (!mGIFStruct.images_decoded) {
// Only need to flush first frame
FlushImageData();
// If the first frame is smaller in height than the entire image, send a
// OnDataAvailable (Display Refresh) for the area it does not have data for.
// This will clear the remaining bits of the placeholder. (Bug 37589)
@ -374,6 +381,8 @@ void nsGIFDecoder2::EndImageFrame()
mObserver->OnDataAvailable(nsnull, mImageFrame, &r);
}
}
mCurrentRow = mLastFlushedRow = -1;
mCurrentPass = mLastFlushedPass = 0;
mGIFStruct.images_decoded++;
@ -405,46 +414,57 @@ PRUint32 nsGIFDecoder2::OutputRow()
int drow_start, drow_end;
drow_start = drow_end = mGIFStruct.irow;
/*
* Haeberli-inspired hack for interlaced GIFs: Replicate lines while
* displaying to diminish the "venetian-blind" effect as the image is
* loaded. Adjust pixel vertical positions to avoid the appearance of the
* image crawling up the screen as successive passes are drawn.
*/
if (mGIFStruct.progressive_display && mGIFStruct.interlaced && (mGIFStruct.ipass < 4)) {
/* ipass = 1,2,3 results in resp. row_dup = 7,3,1 and row_shift = 3,1,0 */
const PRUint32 row_dup = 15 >> mGIFStruct.ipass;
const PRUint32 row_shift = row_dup >> 1;
drow_start -= row_shift;
drow_end = drow_start + row_dup;
/* Extend if bottom edge isn't covered because of the shift upward. */
if (((mGIFStruct.height - 1) - drow_end) <= row_shift)
drow_end = mGIFStruct.height - 1;
/* Clamp first and last rows to upper and lower edge of image. */
if (drow_start < 0)
drow_start = 0;
if ((PRUintn)drow_end >= mGIFStruct.height)
drow_end = mGIFStruct.height - 1;
}
/* Protect against too much image data */
if ((PRUintn)drow_start >= mGIFStruct.height) {
NS_WARNING("GIF2.cpp::OutputRow - too much image data");
return 0;
}
if (!mGIFStruct.images_decoded) {
/*
* Haeberli-inspired hack for interlaced GIFs: Replicate lines while
* displaying to diminish the "venetian-blind" effect as the image is
* loaded. Adjust pixel vertical positions to avoid the appearance of the
* image crawling up the screen as successive passes are drawn.
*/
if (mGIFStruct.progressive_display && mGIFStruct.interlaced && (mGIFStruct.ipass < 4)) {
/* ipass = 1,2,3 results in resp. row_dup = 7,3,1 and row_shift = 3,1,0 */
const PRUint32 row_dup = 15 >> mGIFStruct.ipass;
const PRUint32 row_shift = row_dup >> 1;
// Duplicate rows
if (drow_end > drow_start) {
// irow is the current row filled
const PRUint32 width = mGIFStruct.width;
PRUint32 *rgbRowIndex = mImageData + mGIFStruct.irow * width;
for (int r = drow_start; r <= drow_end; r++) {
if (r != mGIFStruct.irow) {
memcpy(mImageData + r * width, rgbRowIndex, width*sizeof(PRUint32));
drow_start -= row_shift;
drow_end = drow_start + row_dup;
/* Extend if bottom edge isn't covered because of the shift upward. */
if (((mGIFStruct.height - 1) - drow_end) <= row_shift)
drow_end = mGIFStruct.height - 1;
/* Clamp first and last rows to upper and lower edge of image. */
if (drow_start < 0)
drow_start = 0;
if ((PRUintn)drow_end >= mGIFStruct.height)
drow_end = mGIFStruct.height - 1;
}
// Row to process
const PRUint32 bpr = sizeof(PRUint32) * mGIFStruct.width;
PRUint8 *rowp = mImageData + (mGIFStruct.irow * bpr);
// Convert color indices to Cairo pixels
PRUint8 *from = rowp + mGIFStruct.width;
PRUint32 *to = ((PRUint32*)rowp) + mGIFStruct.width;
PRUint32 *cmap = mColormap;
for (PRUint32 c = mGIFStruct.width; c > 0; c--) {
*--to = cmap[*--from];
}
// Duplicate rows
if (drow_end > drow_start) {
// irow is the current row filled
for (int r = drow_start; r <= drow_end; r++) {
if (r != mGIFStruct.irow) {
memcpy(mImageData + (r * bpr), rowp, bpr);
}
}
}
}
@ -454,7 +474,6 @@ PRUint32 nsGIFDecoder2::OutputRow()
if (mGIFStruct.ipass == 1)
mLastFlushedPass = mGIFStruct.ipass; // interlaced starts at 1
if (!mGIFStruct.interlaced) {
mGIFStruct.irow++;
} else {
@ -498,14 +517,18 @@ nsGIFDecoder2::DoLzw(const PRUint8 *q)
PRUint8 *stackp = mGIFStruct.stackp;
PRUint8 *suffix = mGIFStruct.suffix;
PRUint8 *stack = mGIFStruct.stack;
PRUint32 *rowp = mGIFStruct.rowp;
PRUint32 *rowend = mImageData + (mGIFStruct.irow + 1) * mGIFStruct.width;
PRUint32 *cmap = mColormap;
PRUint8 *rowp = mGIFStruct.rowp;
PRUint32 bpr = mGIFStruct.width;
if (!mGIFStruct.images_decoded)
bpr *= sizeof(PRUint32);
PRUint8 *rowend = mImageData + (bpr * mGIFStruct.irow) + mGIFStruct.width;
#define OUTPUT_ROW() \
PR_BEGIN_MACRO \
if (!OutputRow()) \
goto END; \
rowp = mImageData + mGIFStruct.irow * mGIFStruct.width; \
rowp = mImageData + mGIFStruct.irow * bpr; \
rowend = rowp + mGIFStruct.width; \
PR_END_MACRO
@ -539,7 +562,7 @@ nsGIFDecoder2::DoLzw(const PRUint8 *q)
}
if (oldcode == -1) {
*rowp++ = cmap[suffix[code]];
*rowp++ = suffix[code];
if (rowp == rowend)
OUTPUT_ROW();
@ -589,7 +612,7 @@ nsGIFDecoder2::DoLzw(const PRUint8 *q)
/* Copy the decoded data out to the scanline buffer. */
do {
*rowp++ = cmap[*--stackp];
*rowp++ = *--stackp;
if (rowp == rowend)
OUTPUT_ROW();
} while (stackp > stack);
@ -630,9 +653,6 @@ static void ConvertColormap(PRUint32 *aColormap, PRUint32 aColors)
PRUint8 *from = ((PRUint8 *)aColormap) + 3 * aColors;
PRUint32 *to = aColormap + aColors;
// Clear part after defined colors
memset(to, 0, (MAX_COLORS - aColors)*sizeof(PRUint32));
// Convert color entries to Cairo format
for (PRUint32 c = aColors; c > 0; c--) {
from -= 3;
@ -656,7 +676,7 @@ nsresult nsGIFDecoder2::GifWrite(const PRUint8 *buf, PRUint32 len)
// If previous call to me left something in the hold first complete current block
// Or if we are filling the colormaps, first complete the colormap
PRUint8* p = (mGIFStruct.state == gif_global_colormap) ? (PRUint8*)mGIFStruct.global_colormap :
(mGIFStruct.state == gif_image_colormap) ? (PRUint8*)mGIFStruct.local_colormap :
(mGIFStruct.state == gif_image_colormap) ? (PRUint8*)mColormap :
(mGIFStruct.bytes_in_hold) ? mGIFStruct.hold : nsnull;
if (p) {
// Add what we have sofar to the block
@ -703,7 +723,9 @@ nsresult nsGIFDecoder2::GifWrite(const PRUint8 *buf, PRUint32 len)
{
// Make sure the transparent pixel is transparent in the colormap
if (mGIFStruct.is_transparent) {
mOldColor = mColormap[mGIFStruct.tpixel];
// Save old value so we can restore it later
if (mColormap == mGIFStruct.global_colormap)
mOldColor = mColormap[mGIFStruct.tpixel];
mColormap[mGIFStruct.tpixel] = 0;
}
@ -755,7 +777,7 @@ nsresult nsGIFDecoder2::GifWrite(const PRUint8 *buf, PRUint32 len)
mGIFStruct.screen_width = GETINT16(q);
mGIFStruct.screen_height = GETINT16(q + 2);
mGIFStruct.global_colormap_size = 2<<(q[4]&0x07);
mGIFStruct.global_colormap_depth = (q[4]&0x07) + 1;
// screen_bgcolor is not used
//mGIFStruct.screen_bgcolor = q[5];
@ -765,7 +787,7 @@ nsresult nsGIFDecoder2::GifWrite(const PRUint8 *buf, PRUint32 len)
if (q[4] & 0x80) { /* global map */
// Get the global colormap
const PRUint32 size = 3*mGIFStruct.global_colormap_size;
const PRUint32 size = (3 << mGIFStruct.global_colormap_depth);
if (len < size) {
// Use 'hold' pattern to get the global colormap
GETN(size, gif_global_colormap);
@ -785,7 +807,7 @@ nsresult nsGIFDecoder2::GifWrite(const PRUint8 *buf, PRUint32 len)
case gif_global_colormap:
// Everything is already copied into global_colormap
// Convert into Cairo colors including CMS transformation
ConvertColormap(mGIFStruct.global_colormap, mGIFStruct.global_colormap_size);
ConvertColormap(mGIFStruct.global_colormap, 1<<mGIFStruct.global_colormap_depth);
GETN(1, gif_image_start);
break;
@ -928,6 +950,7 @@ nsresult nsGIFDecoder2::GifWrite(const PRUint8 *buf, PRUint32 len)
break;
case gif_image_header:
{
/* Get image offsets, with respect to the screen origin */
mGIFStruct.x_offset = GETINT16(q);
mGIFStruct.y_offset = GETINT16(q + 2);
@ -964,7 +987,13 @@ nsresult nsGIFDecoder2::GifWrite(const PRUint8 *buf, PRUint32 len)
}
}
BeginImageFrame();
/* Depth of colors is determined by colormap */
/* (q[8] & 0x80) indicates local colormap */
/* bits per pixel is (q[8]&0x07 + 1) when local colormap is set */
PRUint32 depth = mGIFStruct.global_colormap_depth;
if (q[8] & 0x80)
depth = (q[8]&0x07) + 1;
BeginImageFrame(depth);
// handle allocation error
if (!mImageFrame) {
@ -992,28 +1021,33 @@ nsresult nsGIFDecoder2::GifWrite(const PRUint8 *buf, PRUint32 len)
if (q[8] & 0x80) /* has a local colormap? */
{
const int num_colors = 2 << (q[8] & 0x7);
const PRUint32 size = 3*num_colors;
if (!mGIFStruct.local_colormap) {
mGIFStruct.local_colormap =
(PRUint32*)PR_MALLOC(MAX_COLORS * sizeof(PRUint32));
mGIFStruct.local_colormap_size = 1 << depth;
if (mGIFStruct.images_decoded) {
// Copy directly into the palette of current frame,
// by pointing mColormap to that palette.
PRUint32 paletteSize;
mImageFrame->GetPaletteData(&mColormap, &paletteSize);
} else {
// First frame has local colormap, allocate space for it
// as the image frame doesn't have its own palette
if (!mGIFStruct.local_colormap) {
mGIFStruct.state = gif_oom;
break;
mGIFStruct.local_colormap =
(PRUint32*)PR_MALLOC(mGIFStruct.local_colormap_size * sizeof(PRUint32));
if (!mGIFStruct.local_colormap) {
mGIFStruct.state = gif_oom;
break;
}
}
mColormap = mGIFStruct.local_colormap;
}
/* Switch to the new local palette after it loads */
mGIFStruct.local_colormap_size = num_colors;
mColormap = mGIFStruct.local_colormap;
const PRUint32 size = 3 << depth;
if (len < size) {
// Use 'hold' pattern to get the image colormap
GETN(size, gif_image_colormap);
break;
}
// Copy everything, go to colormap state to do CMS correction
memcpy(mGIFStruct.local_colormap, buf, size);
memcpy(mColormap, buf, size);
buf += size;
len -= size;
GETN(0, gif_image_colormap);
@ -1021,14 +1055,21 @@ nsresult nsGIFDecoder2::GifWrite(const PRUint8 *buf, PRUint32 len)
} else {
/* Switch back to the global palette */
mColormap = mGIFStruct.global_colormap;
if (mGIFStruct.images_decoded) {
// Copy global colormap into the palette of current frame
PRUint32 size;
mImageFrame->GetPaletteData(&mColormap, &size);
memcpy(mColormap, mGIFStruct.global_colormap, size);
}
}
GETN(1, gif_lzw_start);
break;
}
break;
case gif_image_colormap:
// Everything is already copied into local_colormap
// Convert into Cairo colors including CMS transformation
ConvertColormap(mGIFStruct.local_colormap, mGIFStruct.local_colormap_size);
ConvertColormap(mColormap, mGIFStruct.local_colormap_size);
GETN(1, gif_lzw_start);
break;
@ -1091,7 +1132,7 @@ nsresult nsGIFDecoder2::GifWrite(const PRUint8 *buf, PRUint32 len)
if (len) {
// Add what we have sofar to the block
PRUint8* p = (mGIFStruct.state == gif_global_colormap) ? (PRUint8*)mGIFStruct.global_colormap :
(mGIFStruct.state == gif_image_colormap) ? (PRUint8*)mGIFStruct.local_colormap :
(mGIFStruct.state == gif_image_colormap) ? (PRUint8*)mColormap :
mGIFStruct.hold;
memcpy(p, buf, len);
mGIFStruct.bytes_to_consume -= len;

4
modules/libpr0n/decoders/gif/nsGIFDecoder2.h
Просмотреть файл

@ -76,7 +76,7 @@ private:
void BeginGIF();
void EndGIF();
void BeginImageFrame();
void BeginImageFrame(gfx_depth aDepth);
void EndImageFrame();
void FlushImageData();
void FlushImageData(PRUint32 fromRow, PRUint32 rows);
@ -93,7 +93,7 @@ private:
PRInt32 mCurrentRow;
PRInt32 mLastFlushedRow;
PRUint32 *mImageData; // Pointer to image data in Cairo format
PRUint8 *mImageData; // Pointer to image data in either Cairo or 8bit format
PRUint32 *mColormap; // Current colormap to be used in Cairo format
PRUint32 mOldColor; // The old value of the transparent pixel
PRUint8 mCurrentPass;

264
modules/libpr0n/src/imgContainer.cpp
Просмотреть файл

@ -791,28 +791,17 @@ nsresult imgContainer::DoComposite(gfxIImageFrame** aFrameToUse,
if (prevFrameDisposalMethod == imgIContainer::kDisposeRestorePrevious &&
!mAnim->compositingPrevFrame)
prevFrameDisposalMethod = imgIContainer::kDisposeClear;
// Optimization: Skip compositing if the previous frame wants to clear the
// whole image
if (prevFrameDisposalMethod == imgIContainer::kDisposeClearAll) {
aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
*aFrameToUse = aNextFrame;
return NS_OK;
}
nsIntRect prevFrameRect;
aPrevFrame->GetRect(prevFrameRect);
PRBool isFullPrevFrame = (prevFrameRect.x == 0 && prevFrameRect.y == 0 &&
prevFrameRect.width == mSize.width &&
prevFrameRect.height == mSize.height);
// Optimization: Skip compositing if the previous frame is the same size as
// Optimization: DisposeClearAll if the previous frame is the same size as
// container and it's clearing itself
if (isFullPrevFrame && prevFrameDisposalMethod == imgIContainer::kDisposeClear) {
aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
*aFrameToUse = aNextFrame;
return NS_OK;
}
if (isFullPrevFrame &&
(prevFrameDisposalMethod == imgIContainer::kDisposeClear))
prevFrameDisposalMethod = imgIContainer::kDisposeClearAll;
PRInt32 nextFrameDisposalMethod;
nsIntRect nextFrameRect;
@ -824,18 +813,24 @@ nsresult imgContainer::DoComposite(gfxIImageFrame** aFrameToUse,
gfx_format nextFormat;
aNextFrame->GetFormat(&nextFormat);
PRBool nextFrameHasAlpha = (nextFormat != gfxIFormats::RGB) &&
(nextFormat != gfxIFormats::BGR);
// Optimization: Skip compositing if this frame is the same size as the
// container and it's fully drawing over prev frame (no alpha)
if (isFullNextFrame &&
(nextFrameDisposalMethod != imgIContainer::kDisposeRestorePrevious) &&
!nextFrameHasAlpha) {
aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
*aFrameToUse = aNextFrame;
return NS_OK;
if (nextFormat != gfxIFormats::PAL && nextFormat != gfxIFormats::PAL_A1) {
// Optimization: Skip compositing if the previous frame wants to clear the
// whole image
if (prevFrameDisposalMethod == imgIContainer::kDisposeClearAll) {
aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
*aFrameToUse = aNextFrame;
return NS_OK;
}
// Optimization: Skip compositing if this frame is the same size as the
// container and it's fully drawing over prev frame (no alpha)
if (isFullNextFrame &&
(nextFrameDisposalMethod != imgIContainer::kDisposeRestorePrevious) &&
(nextFormat == gfxIFormats::RGB)) {
aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
*aFrameToUse = aNextFrame;
return NS_OK;
}
}
// Calculate area that needs updating
@ -846,6 +841,11 @@ nsresult imgContainer::DoComposite(gfxIImageFrame** aFrameToUse,
*aDirtyRect = nextFrameRect;
break;
case imgIContainer::kDisposeClearAll:
// Whole image container is cleared
aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
break;
case imgIContainer::kDisposeClear:
// Calc area that needs to be redrawn (the combination of previous and
// this frame)
@ -891,55 +891,89 @@ nsresult imgContainer::DoComposite(gfxIImageFrame** aFrameToUse,
needToBlankComposite = PR_TRUE;
}
// Copy previous frame into compositingFrame before we put the new frame on top
// Assumes that the previous frame represents a full frame (it could be
// smaller in size than the container, as long as the frame before it erased
// itself)
// Note: Frame 1 never gets into DoComposite(), so (aNextFrameIndex - 1) will
// always be a valid frame number.
if (mAnim->lastCompositedFrameIndex != aNextFrameIndex - 1 &&
prevFrameDisposalMethod != imgIContainer::kDisposeRestorePrevious) {
// XXX If we had a method of drawing a section of a frame into another, we
// could optimize further:
// if aPrevFrameIndex == 1 && lastCompositedFrameIndex <> -1,
// only firstFrameRefreshArea needs to be drawn back to composite
if (isFullPrevFrame) {
CopyFrameImage(aPrevFrame, mAnim->compositingFrame);
} else {
ClearFrame(mAnim->compositingFrame);
DrawFrameTo(aPrevFrame, mAnim->compositingFrame, prevFrameRect);
// More optimizations possible when next frame is not transparent
PRBool doDisposal = PR_TRUE;
if ((nextFormat == gfxIFormats::RGB)||(nextFormat == gfxIFormats::PAL)) {
if (isFullNextFrame) {
// Optimization: No need to dispose prev.frame when
// next frame is full frame and not transparent.
doDisposal = PR_FALSE;
// No need to blank the composite frame
needToBlankComposite = PR_FALSE;
}
} else {
if ((prevFrameRect.x >= nextFrameRect.x) &&
(prevFrameRect.y >= nextFrameRect.y) &&
(prevFrameRect.x + prevFrameRect.width <= nextFrameRect.x + nextFrameRect.width) &&
(prevFrameRect.y + prevFrameRect.height <= nextFrameRect.y + nextFrameRect.height)) {
// Optimization: No need to dispose prev.frame when
// next frame fully overlaps previous frame.
doDisposal = PR_FALSE;
}
}
}
// Dispose of previous
switch (prevFrameDisposalMethod) {
case imgIContainer::kDisposeClear:
if (needToBlankComposite) {
// If we just created the composite, it could have anything in it's
// buffers. Clear them
if (doDisposal) {
// Dispose of previous: clear, restore, or keep (copy)
switch (prevFrameDisposalMethod) {
case imgIContainer::kDisposeClear:
if (needToBlankComposite) {
// If we just created the composite, it could have anything in it's
// buffer. Clear whole frame
ClearFrame(mAnim->compositingFrame);
} else {
// Only blank out previous frame area (both color & Mask/Alpha)
ClearFrame(mAnim->compositingFrame, prevFrameRect);
}
break;
case imgIContainer::kDisposeClearAll:
ClearFrame(mAnim->compositingFrame);
needToBlankComposite = PR_FALSE;
} else {
// Blank out previous frame area (both color & Mask/Alpha)
ClearFrame(mAnim->compositingFrame, prevFrameRect);
}
break;
case imgIContainer::kDisposeRestorePrevious:
// It would be better to copy only the area changed back to
// compositingFrame.
if (mAnim->compositingPrevFrame) {
CopyFrameImage(mAnim->compositingPrevFrame, mAnim->compositingFrame);
// destroy only if we don't need it for this frame's disposal
if (nextFrameDisposalMethod != imgIContainer::kDisposeRestorePrevious)
mAnim->compositingPrevFrame = nsnull;
} else {
ClearFrame(mAnim->compositingFrame);
}
break;
break;
case imgIContainer::kDisposeRestorePrevious:
// It would be better to copy only the area changed back to
// compositingFrame.
if (mAnim->compositingPrevFrame) {
CopyFrameImage(mAnim->compositingPrevFrame, mAnim->compositingFrame);
// destroy only if we don't need it for this frame's disposal
if (nextFrameDisposalMethod != imgIContainer::kDisposeRestorePrevious)
mAnim->compositingPrevFrame = nsnull;
} else {
ClearFrame(mAnim->compositingFrame);
}
break;
default:
// Copy previous frame into compositingFrame before we put the new frame on top
// Assumes that the previous frame represents a full frame (it could be
// smaller in size than the container, as long as the frame before it erased
// itself)
// Note: Frame 1 never gets into DoComposite(), so (aNextFrameIndex - 1) will
// always be a valid frame number.
if (mAnim->lastCompositedFrameIndex != aNextFrameIndex - 1) {
gfx_format prevFormat;
aPrevFrame->GetFormat(&prevFormat);
if (isFullPrevFrame &&
prevFormat != gfxIFormats::PAL && prevFormat != gfxIFormats::PAL_A1) {
// Just copy the bits
CopyFrameImage(aPrevFrame, mAnim->compositingFrame);
} else {
if (needToBlankComposite) {
// Only blank composite when prev is transparent or not full.
if (!isFullPrevFrame ||
(prevFormat != gfxIFormats::RGB && prevFormat != gfxIFormats::PAL)) {
ClearFrame(mAnim->compositingFrame);
}
}
DrawFrameTo(aPrevFrame, mAnim->compositingFrame, prevFrameRect);
}
}
}
} else if (needToBlankComposite) {
// If we just created the composite, it could have anything in it's
// buffers. Clear them
ClearFrame(mAnim->compositingFrame);
}
// Check if the frame we are composing wants the previous image restored afer
@ -972,7 +1006,15 @@ nsresult imgContainer::DoComposite(gfxIImageFrame** aFrameToUse,
aNextFrame->GetTimeout(&timeout);
mAnim->compositingFrame->SetTimeout(timeout);
if (isFullNextFrame && mAnimationMode == kNormalAnimMode && mLoopCount != 0) {
// Tell the image that it is fully 'downloaded'.
nsIntRect r;
mAnim->compositingFrame->GetRect(r);
nsCOMPtr<nsIImage> img = do_GetInterface(mAnim->compositingFrame);
img->ImageUpdated(nsnull, nsImageUpdateFlags_kBitsChanged, &r);
// We don't want to keep composite images for 8bit frames...
if (isFullNextFrame && mAnimationMode == kNormalAnimMode && mLoopCount != 0 &&
nextFormat != gfxIFormats::PAL && nextFormat != gfxIFormats::PAL_A1) {
// We have a composited full frame
// Store the composited frame into the mFrames[..] so we don't have to
// continuously re-build it
@ -1007,10 +1049,6 @@ void imgContainer::ClearFrame(gfxIImageFrame *aFrame)
gfxContext ctx(surf);
ctx.SetOperator(gfxContext::OPERATOR_CLEAR);
ctx.Paint();
nsIntRect r;
aFrame->GetRect(r);
img->ImageUpdated(nsnull, nsImageUpdateFlags_kBitsChanged, &r);
}
//******************************************************************************
@ -1029,8 +1067,6 @@ void imgContainer::ClearFrame(gfxIImageFrame *aFrame, nsIntRect &aRect)
ctx.SetOperator(gfxContext::OPERATOR_CLEAR);
ctx.Rectangle(gfxRect(aRect.x, aRect.y, aRect.width, aRect.height));
ctx.Fill();
img->ImageUpdated(nsnull, nsImageUpdateFlags_kBitsChanged, &aRect);
}
@ -1061,14 +1097,6 @@ PRBool imgContainer::CopyFrameImage(gfxIImageFrame *aSrcFrame,
memcpy(aDataDest, aDataSrc, aDataLengthSrc);
aDstFrame->UnlockImageData();
// Tell the image that it's data has been updated
nsCOMPtr<nsIImage> img(do_GetInterface(aDstFrame));
if (!img)
return PR_FALSE;
nsIntRect r;
aDstFrame->GetRect(r);
img->ImageUpdated(nsnull, nsImageUpdateFlags_kBitsChanged, &r);
return PR_TRUE;
}
@ -1080,6 +1108,65 @@ nsresult imgContainer::DrawFrameTo(gfxIImageFrame *aSrc,
if (!aSrc || !aDst)
return NS_ERROR_NOT_INITIALIZED;
nsIntRect srcRect, dstRect;
aSrc->GetRect(srcRect);
aDst->GetRect(dstRect);
gfx_format format;
aSrc->GetFormat(&format);
if (format == gfxIFormats::PAL || format == gfxIFormats::PAL_A1) {
// dstRect must fully fit within destination image
NS_ASSERTION((aDstRect.x >= 0) && (aDstRect.y >= 0) &&
(aDstRect.x + aDstRect.width <= dstRect.width) &&
(aDstRect.y + aDstRect.height <= dstRect.height),
"imgContainer::DrawFrameTo: Invalid aDstRect");
// dstRect size may be smaller than source, but not larger
NS_ASSERTION((aDstRect.width <= srcRect.width) &&
(aDstRect.height <= srcRect.height),
"imgContainer::DrawFrameTo: source and dest size must be equal");
if (NS_FAILED(aDst->LockImageData()))
return NS_ERROR_FAILURE;
// Get pointers to image data
PRUint32 size;
PRUint8 *srcPixels;
gfx_color *colormap;
gfx_color *dstPixels;
aSrc->GetImageData(&srcPixels, &size);
aDst->GetImageData((PRUint8**)&dstPixels, &size);
aSrc->GetPaletteData(&colormap, &size);
if (!srcPixels || !dstPixels || !colormap) {
aDst->UnlockImageData();
return NS_ERROR_FAILURE;
}
// Skip to the right offset
dstPixels += aDstRect.x + (aDstRect.y * dstRect.width);
const PRUint32 width = (PRUint32)aDstRect.width;
if (format == gfxIFormats::PAL) {
for (PRUint32 r = aDstRect.height; r > 0; --r) {
for (PRUint32 c = width; c > 0; --c) {
*dstPixels++ = colormap[*srcPixels++];
}
dstPixels += dstRect.width - width;
}
} else {
// With transparent source, skip transparent pixels
for (PRUint32 r = aDstRect.height; r > 0; --r) {
for (PRUint32 c = width; c > 0; --c) {
const PRUint32 color = colormap[*srcPixels++];
if (color)
*dstPixels = color;
dstPixels ++;
}
dstPixels += dstRect.width - width;
}
}
aDst->UnlockImageData();
return NS_OK;
}
nsCOMPtr<nsIImage> srcImg(do_GetInterface(aSrc));
nsRefPtr<gfxASurface> srcSurf;
srcImg->GetSurface(getter_AddRefs(srcSurf));
@ -1107,9 +1194,6 @@ nsresult imgContainer::DrawFrameTo(gfxIImageFrame *aSrc,
// before we've even begun.
dst.Translate(gfxPoint(aDstRect.x, aDstRect.y));
dst.Rectangle(gfxRect(0, 0, aDstRect.width, aDstRect.height), PR_TRUE);
nsIntRect srcRect;
aSrc->GetRect(srcRect);
dst.Scale(double(aDstRect.width) / srcRect.width,
double(aDstRect.height) / srcRect.height);
dst.SetSource(srcSurf);