コード例 #1
0
MpResizeImageWindow::MpResizeImageWindow(MpWindow &parent, const MpImage *source, 
					 int w, int h, int x, int y, 
					 bool SmoothResize) 
  : MpImageWindow(parent,&WorkImage,w,h,x,y,false),
    SmoothResize(SmoothResize), source(source)
{ 
  WorkImage.Resize(w,h);
  WorkImage.InsertResize(*source,SmoothResize);
  SetHold(true); // trigger conversion and hold image
}
コード例 #2
0
ファイル: cMultiObj.cpp プロジェクト: bholtsclaw/uox3
//o--------------------------------------------------------------------------o
//|	Function		-	bool HandleLine( UString &UTag, UString &data )
//|	Date			-	Unknown
//|	Programmer		-	Abaddon
//|	Modified		-
//o--------------------------------------------------------------------------o
//|	Purpose			-	Processes a tag/data pair if it can.  If it can, returns
//|						true.  Otherwise, returns false.
//o--------------------------------------------------------------------------o
bool CBoatObj::HandleLine( UString &UTag, UString &data )
{
	bool rvalue = CMultiObj::HandleLine( UTag, data );
	if( !rvalue )
	{
		switch( (UTag.data()[0]) )
		{
			case 'M':
				if( UTag == "MOVETYPE" )
				{
					rvalue = true;
				}
			case 'H':
				if( UTag == "HOLD" )
				{
					SetHold( data.toULong() );
					rvalue = true;
				}
				break;
			case 'P':
				if( UTag == "PLANKS" )
				{
					SetPlank( 0, data.section( ",", 0, 0 ).stripWhiteSpace().toULong() );
					SetPlank( 1, data.section( ",", 1, 1 ).stripWhiteSpace().toULong() );
					rvalue = true;
				}
				break;
			case 'T':
				if( UTag == "TILLER" )
				{
					SetTiller( data.toULong() );
					rvalue = true;
				}
				break;
		}
	}
	return rvalue;
}
コード例 #3
0
void
nsGIFDecoder2::WriteInternal(const char *aBuffer, uint32_t aCount, DecodeStrategy)
{
  NS_ABORT_IF_FALSE(!HasError(), "Shouldn't call WriteInternal after error!");

  // These variables changed names, and renaming would make a much bigger patch :(
  const uint8_t *buf = (const uint8_t *)aBuffer;
  uint32_t len = aCount;

  const uint8_t *q = buf;

  // Add what we have sofar to the block
  // 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
  uint8_t* p = (mGIFStruct.state == gif_global_colormap) ? (uint8_t*)mGIFStruct.global_colormap :
               (mGIFStruct.state == gif_image_colormap) ? (uint8_t*)mColormap :
               (mGIFStruct.bytes_in_hold) ? mGIFStruct.hold : nullptr;

  if (len == 0 && buf == nullptr) {
    // We've just gotten the frame we asked for. Time to use the data we
    // stashed away.
    len = mGIFStruct.bytes_in_hold;
    q = buf = p;
  } else if (p) {
    // Add what we have sofar to the block
    uint32_t l = std::min(len, mGIFStruct.bytes_to_consume);
    memcpy(p+mGIFStruct.bytes_in_hold, buf, l);

    if (l < mGIFStruct.bytes_to_consume) {
      // Not enough in 'buf' to complete current block, get more
      mGIFStruct.bytes_in_hold += l;
      mGIFStruct.bytes_to_consume -= l;
      return;
    }
    // Point 'q' to complete block in hold (or in colormap)
    q = p;
  }

  // Invariant:
  //    'q' is start of current to be processed block (hold, colormap or buf)
  //    'bytes_to_consume' is number of bytes to consume from 'buf'
  //    'buf' points to the bytes to be consumed from the input buffer
  //    'len' is number of bytes left in input buffer from position 'buf'.
  //    At entrance of the for loop will 'buf' will be moved 'bytes_to_consume'
  //    to point to next buffer, 'len' is adjusted accordingly.
  //    So that next round in for loop, q gets pointed to the next buffer.

  for (;len >= mGIFStruct.bytes_to_consume; q=buf, mGIFStruct.bytes_in_hold = 0) {
    // Eat the current block from the buffer, q keeps pointed at current block
    buf += mGIFStruct.bytes_to_consume;
    len -= mGIFStruct.bytes_to_consume;

    switch (mGIFStruct.state)
    {
    case gif_lzw:
      if (!DoLzw(q)) {
        mGIFStruct.state = gif_error;
        break;
      }
      GETN(1, gif_sub_block);
      break;

    case gif_lzw_start:
    {
      // Make sure the transparent pixel is transparent in the colormap
      if (mGIFStruct.is_transparent) {
        // Save old value so we can restore it later
        if (mColormap == mGIFStruct.global_colormap)
            mOldColor = mColormap[mGIFStruct.tpixel];
        mColormap[mGIFStruct.tpixel] = 0;
      }

      /* Initialize LZW parser/decoder */
      mGIFStruct.datasize = *q;
      const int clear_code = ClearCode();
      if (mGIFStruct.datasize > MAX_LZW_BITS ||
          clear_code >= MAX_BITS) {
        mGIFStruct.state = gif_error;
        break;
      }

      mGIFStruct.avail = clear_code + 2;
      mGIFStruct.oldcode = -1;
      mGIFStruct.codesize = mGIFStruct.datasize + 1;
      mGIFStruct.codemask = (1 << mGIFStruct.codesize) - 1;
      mGIFStruct.datum = mGIFStruct.bits = 0;

      /* init the tables */
      for (int i = 0; i < clear_code; i++)
        mGIFStruct.suffix[i] = i;

      mGIFStruct.stackp = mGIFStruct.stack;

      GETN(1, gif_sub_block);
    }
    break;

    /* All GIF files begin with "GIF87a" or "GIF89a" */
    case gif_type:
      if (!strncmp((char*)q, "GIF89a", 6)) {
        mGIFStruct.version = 89;
      } else if (!strncmp((char*)q, "GIF87a", 6)) {
        mGIFStruct.version = 87;
      } else {
        mGIFStruct.state = gif_error;
        break;
      }
      GETN(7, gif_global_header);
      break;

    case gif_global_header:
      /* This is the height and width of the "screen" or
       * frame into which images are rendered.  The
       * individual images can be smaller than the
       * screen size and located with an origin anywhere
       * within the screen.
       */

      mGIFStruct.screen_width = GETINT16(q);
      mGIFStruct.screen_height = GETINT16(q + 2);
      mGIFStruct.global_colormap_depth = (q[4]&0x07) + 1;

      if (IsSizeDecode()) {
        MOZ_ASSERT(!mGIFOpen, "Gif should not be open at this point");
        PostSize(mGIFStruct.screen_width, mGIFStruct.screen_height);
        return;
      }

      // screen_bgcolor is not used
      //mGIFStruct.screen_bgcolor = q[5];
      // q[6] = Pixel Aspect Ratio
      //   Not used
      //   float aspect = (float)((q[6] + 15) / 64.0);

      if (q[4] & 0x80) { /* global map */
        // Get the global colormap
        const uint32_t size = (3 << mGIFStruct.global_colormap_depth);
        if (len < size) {
          // Use 'hold' pattern to get the global colormap
          GETN(size, gif_global_colormap);
          break;
        }
        // Copy everything, go to colormap state to do CMS correction
        memcpy(mGIFStruct.global_colormap, buf, size);
        buf += size;
        len -= size;
        GETN(0, gif_global_colormap);
        break;
      }

      GETN(1, gif_image_start);
      break;

    case gif_global_colormap:
      // Everything is already copied into global_colormap
      // Convert into Cairo colors including CMS transformation
      ConvertColormap(mGIFStruct.global_colormap, 1<<mGIFStruct.global_colormap_depth);
      GETN(1, gif_image_start);
      break;

    case gif_image_start:
      switch (*q) {
        case GIF_TRAILER:
          mGIFStruct.state = gif_done;
          break;

        case GIF_EXTENSION_INTRODUCER:
          GETN(2, gif_extension);
          break;

        case GIF_IMAGE_SEPARATOR:
          GETN(9, gif_image_header);
          break;

        default:
          /* If we get anything other than GIF_IMAGE_SEPARATOR, 
           * GIF_EXTENSION_INTRODUCER, or GIF_TRAILER, there is extraneous data
           * between blocks. The GIF87a spec tells us to keep reading
           * until we find an image separator, but GIF89a says such
           * a file is corrupt. We follow GIF89a and bail out. */
          if (mGIFStruct.images_decoded > 0) {
            /* The file is corrupt, but one or more images have
             * been decoded correctly. In this case, we proceed
             * as if the file were correctly terminated and set
             * the state to gif_done, so the GIF will display.
             */
            mGIFStruct.state = gif_done;
          } else {
            /* No images decoded, there is nothing to display. */
            mGIFStruct.state = gif_error;
          }
      }
      break;

    case gif_extension:
      mGIFStruct.bytes_to_consume = q[1];
      if (mGIFStruct.bytes_to_consume) {
        switch (*q) {
        case GIF_GRAPHIC_CONTROL_LABEL:
          // The GIF spec mandates that the GIFControlExtension header block length is 4 bytes,
          // and the parser for this block reads 4 bytes, so we must enforce that the buffer
          // contains at least this many bytes. If the GIF specifies a different length, we
          // allow that, so long as it's larger; the additional data will simply be ignored.
          mGIFStruct.state = gif_control_extension;
          mGIFStruct.bytes_to_consume = std::max(mGIFStruct.bytes_to_consume, 4u);
          break;

        // The GIF spec also specifies the lengths of the following two extensions' headers
        // (as 12 and 11 bytes, respectively). Because we ignore the plain text extension entirely
        // and sanity-check the actual length of the application extension header before reading it,
        // we allow GIFs to deviate from these values in either direction. This is important for
        // real-world compatibility, as GIFs in the wild exist with application extension headers
        // that are both shorter and longer than 11 bytes.
        case GIF_APPLICATION_EXTENSION_LABEL:
          mGIFStruct.state = gif_application_extension;
          break;

        case GIF_PLAIN_TEXT_LABEL:
          mGIFStruct.state = gif_skip_block;
          break;

        case GIF_COMMENT_LABEL:
          mGIFStruct.state = gif_consume_comment;
          break;

        default:
          mGIFStruct.state = gif_skip_block;
        }
      } else {
        GETN(1, gif_image_start);
      }
      break;

    case gif_consume_block:
      if (!*q)
        GETN(1, gif_image_start);
      else
        GETN(*q, gif_skip_block);
      break;

    case gif_skip_block:
      GETN(1, gif_consume_block);
      break;

    case gif_control_extension:
      mGIFStruct.is_transparent = *q & 0x1;
      mGIFStruct.tpixel = q[3];
      mGIFStruct.disposal_method = ((*q) >> 2) & 0x7;
      // Some specs say 3rd bit (value 4), other specs say value 3
      // Let's choose 3 (the more popular)
      if (mGIFStruct.disposal_method == 4)
        mGIFStruct.disposal_method = 3;
      mGIFStruct.delay_time = GETINT16(q + 1) * 10;
      GETN(1, gif_consume_block);
      break;

    case gif_comment_extension:
      if (*q)
        GETN(*q, gif_consume_comment);
      else
        GETN(1, gif_image_start);
      break;

    case gif_consume_comment:
      GETN(1, gif_comment_extension);
      break;

    case gif_application_extension:
      /* Check for netscape application extension */
      if (mGIFStruct.bytes_to_consume == 11 &&
          (!strncmp((char*)q, "NETSCAPE2.0", 11) ||
           !strncmp((char*)q, "ANIMEXTS1.0", 11)))
        GETN(1, gif_netscape_extension_block);
      else
        GETN(1, gif_consume_block);
      break;

    /* Netscape-specific GIF extension: animation looping */
    case gif_netscape_extension_block:
      if (*q)
        // We might need to consume 3 bytes in
        // gif_consume_netscape_extension, so make sure we have at least that.
        GETN(std::max(3, static_cast<int>(*q)), gif_consume_netscape_extension);
      else
        GETN(1, gif_image_start);
      break;

    /* Parse netscape-specific application extensions */
    case gif_consume_netscape_extension:
      switch (q[0] & 7) {
        case 1:
          /* Loop entire animation specified # of times.  Only read the
             loop count during the first iteration. */
          mGIFStruct.loop_count = GETINT16(q + 1);
          GETN(1, gif_netscape_extension_block);
          break;

        case 2:
          /* Wait for specified # of bytes to enter buffer */
          // Don't do this, this extension doesn't exist (isn't used at all)
          // and doesn't do anything, as our streaming/buffering takes care of it all...
          // See: http://semmix.pl/color/exgraf/eeg24.htm
          GETN(1, gif_netscape_extension_block);
          break;

        default:
          // 0,3-7 are yet to be defined netscape extension codes
          mGIFStruct.state = gif_error;
      }
      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);

      /* Get image width and height. */
      mGIFStruct.width  = GETINT16(q + 4);
      mGIFStruct.height = GETINT16(q + 6);

      if (!mGIFStruct.images_decoded) {
        /* Work around broken GIF files where the logical screen
         * size has weird width or height.  We assume that GIF87a
         * files don't contain animations.
         */
        if ((mGIFStruct.screen_height < mGIFStruct.height) ||
            (mGIFStruct.screen_width < mGIFStruct.width) ||
            (mGIFStruct.version == 87)) {
          mGIFStruct.screen_height = mGIFStruct.height;
          mGIFStruct.screen_width = mGIFStruct.width;
          mGIFStruct.x_offset = 0;
          mGIFStruct.y_offset = 0;
        }    
        // Create the image container with the right size.
        BeginGIF();
        if (HasError()) {
          // Setting the size led to an error.
          mGIFStruct.state = gif_error;
          return;
        }

        // If we were doing a size decode, we're done
        if (IsSizeDecode())
          return;
      }

      /* Work around more broken GIF files that have zero image
         width or height */
      if (!mGIFStruct.height || !mGIFStruct.width) {
        mGIFStruct.height = mGIFStruct.screen_height;
        mGIFStruct.width = mGIFStruct.screen_width;
        if (!mGIFStruct.height || !mGIFStruct.width) {
          mGIFStruct.state = gif_error;
          break;
        }
      }

      /* 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 */
      uint32_t depth = mGIFStruct.global_colormap_depth;
      if (q[8] & 0x80)
        depth = (q[8]&0x07) + 1;
      uint32_t realDepth = depth;
      while (mGIFStruct.tpixel >= (1 << realDepth) && (realDepth < 8)) {
        realDepth++;
      } 
      // Mask to limit the color values within the colormap
      mColorMask = 0xFF >> (8 - realDepth);
      BeginImageFrame(realDepth);

      if (NeedsNewFrame()) {
        // We now need a new frame from the decoder framework. We leave all our
        // data in the buffer as if it wasn't consumed, copy to our hold and return
        // to the decoder framework.
        uint32_t size = len + mGIFStruct.bytes_to_consume + mGIFStruct.bytes_in_hold;
        if (size) {
          if (SetHold(q, mGIFStruct.bytes_to_consume + mGIFStruct.bytes_in_hold, buf, len)) {
            // Back into the decoder infrastructure so we can get called again.
            GETN(9, gif_image_header_continue);
            return;
          }
        }
        break;
      } else {
        // FALL THROUGH
      }
    }

    case gif_image_header_continue:
    {
      // While decoders can reuse frames, we unconditionally increment
      // mGIFStruct.images_decoded when we're done with a frame, so we both can
      // and need to zero out the colormap and image data after every new frame.
      memset(mImageData, 0, mImageDataLength);
      if (mColormap) {
        memset(mColormap, 0, mColormapSize);
      }

      if (!mGIFStruct.images_decoded) {
        // Send a onetime invalidation for the first frame if it has a y-axis offset. 
        // Otherwise, the area may never be refreshed and the placeholder will remain
        // on the screen. (Bug 37589)
        if (mGIFStruct.y_offset > 0) {
          nsIntRect r(0, 0, mGIFStruct.screen_width, mGIFStruct.y_offset);
          PostInvalidation(r);
        }
      }

      if (q[8] & 0x40) {
        mGIFStruct.interlaced = true;
        mGIFStruct.ipass = 1;
      } else {
        mGIFStruct.interlaced = false;
        mGIFStruct.ipass = 0;
      }

      /* Only apply the Haeberli display hack on the first frame */
      mGIFStruct.progressive_display = (mGIFStruct.images_decoded == 0);

      /* Clear state from last image */
      mGIFStruct.irow = 0;
      mGIFStruct.rows_remaining = mGIFStruct.height;
      mGIFStruct.rowp = mImageData;

      /* 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 */
      uint32_t depth = mGIFStruct.global_colormap_depth;
      if (q[8] & 0x80)
        depth = (q[8]&0x07) + 1;
      uint32_t realDepth = depth;
      while (mGIFStruct.tpixel >= (1 << realDepth) && (realDepth < 8)) {
        realDepth++;
      }

      if (q[8] & 0x80) /* has a local colormap? */
      {
        mGIFStruct.local_colormap_size = 1 << depth;
        if (!mGIFStruct.images_decoded) {
          // First frame has local colormap, allocate space for it
          // as the image frame doesn't have its own palette
          mColormapSize = sizeof(uint32_t) << realDepth;
          if (!mGIFStruct.local_colormap) {
            mGIFStruct.local_colormap = (uint32_t*)moz_xmalloc(mColormapSize);
          }
          mColormap = mGIFStruct.local_colormap;
        }
        const uint32_t size = 3 << depth;
        if (mColormapSize > size) {
          // Clear the notfilled part of the colormap
          memset(((uint8_t*)mColormap) + size, 0, mColormapSize - size);
        }
        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(mColormap, buf, size);
        buf += size;
        len -= size;
        GETN(0, gif_image_colormap);
        break;
      } else {
        /* Switch back to the global palette */
        if (mGIFStruct.images_decoded) {
          // Copy global colormap into the palette of current frame
          memcpy(mColormap, mGIFStruct.global_colormap, mColormapSize);
        } else {
          mColormap = mGIFStruct.global_colormap;
        }
      }
      GETN(1, gif_lzw_start);
    }
    break;

    case gif_image_colormap:
      // Everything is already copied into local_colormap
      // Convert into Cairo colors including CMS transformation
      ConvertColormap(mColormap, mGIFStruct.local_colormap_size);
      GETN(1, gif_lzw_start);
      break;

    case gif_sub_block:
      mGIFStruct.count = *q;
      if (mGIFStruct.count) {
        /* Still working on the same image: Process next LZW data block */
        /* Make sure there are still rows left. If the GIF data */
        /* is corrupt, we may not get an explicit terminator.   */
        if (!mGIFStruct.rows_remaining) {
#ifdef DONT_TOLERATE_BROKEN_GIFS
          mGIFStruct.state = gif_error;
          break;
#else
          /* This is an illegal GIF, but we remain tolerant. */
          GETN(1, gif_sub_block);
#endif
          if (mGIFStruct.count == GIF_TRAILER) {
            /* Found a terminator anyway, so consider the image done */
            GETN(1, gif_done);
            break;
          }
        }
        GETN(mGIFStruct.count, gif_lzw);
      } else {
        /* See if there are any more images in this sequence. */
        EndImageFrame();
        GETN(1, gif_image_start);
      }
      break;

    case gif_done:
      MOZ_ASSERT(!IsSizeDecode(), "Size decodes shouldn't reach gif_done");
      FinishInternal();
      goto done;

    case gif_error:
      PostDataError();
      return;

    // We shouldn't ever get here.
    default:
      break;
    }
  }

  // if an error state is set but no data remains, code flow reaches here
  if (mGIFStruct.state == gif_error) {
      PostDataError();
      return;
  }

  // Copy the leftover into mGIFStruct.hold
  if (len) {
    // Add what we have sofar to the block
    if (mGIFStruct.state != gif_global_colormap && mGIFStruct.state != gif_image_colormap) {
      if (!SetHold(buf, len)) {
        PostDataError();
        return;
      }
    } else {
      uint8_t* p = (mGIFStruct.state == gif_global_colormap) ? (uint8_t*)mGIFStruct.global_colormap :
                                                               (uint8_t*)mColormap;
      memcpy(p, buf, len);
      mGIFStruct.bytes_in_hold = len;
    }

    mGIFStruct.bytes_to_consume -= len;
  }

// We want to flush before returning if we're on the first frame
done:
  if (!mGIFStruct.images_decoded) {
    FlushImageData();
    mLastFlushedRow = mCurrentRow;
    mLastFlushedPass = mCurrentPass;
  }

  return;
}