public override void Load(Loaders loaders, MemoryReader mreader, Debugger debugger,
string name, string type,
out Geometry.Traits traits,
out ExpressionDrawer.Image result,
LoadCallback callback)
{
traits = null;
result = null;
// NOTE: If the image is not created at the point of debugging, so the variable is
// uninitialized, the size may be out of bounds of int32 range. In this case the
// exception is thrown here and this is ok. However if there is some garbage in
// memory random size could be loaded here. Then also the memory probably points
// to some random place in memory (maybe protected?) so the result will probably
// be another exception which is fine or an image containing noise from memory.
int width = ExpressionParser.LoadSize(debugger, name + "._view._dimensions.x");
int height = ExpressionParser.LoadSize(debugger, name + "._view._dimensions.y");
if (width < 1 || height < 1)
{
return;
}
string pixelType, isPlanarStr;
if (!Util.Tparams(type, out pixelType, out isPlanarStr))
{
return;
}
string pixelId = Util.BaseType(pixelType);
if (pixelId != "boost::gil::pixel")
{
return;
}
bool isPlanar = (isPlanarStr == "1");
string channelValueType, layoutType;
if (!Util.Tparams(pixelType, out channelValueType, out layoutType))
{
return;
}
string layoutId = Util.BaseType(layoutType);
if (layoutId != "boost::gil::layout")
{
return;
}
string colorSpaceType, channelMappingType;
if (!Util.Tparams(layoutType, out colorSpaceType, out channelMappingType))
{
return;
}
ChannelValueKind channelValueKind = ChannelValueKind.Unknown;
int channelValueSize = 0;
ParseChannelValue(debugger, channelValueType, out channelValueKind, out channelValueSize);
if (channelValueKind == ChannelValueKind.Unknown || channelValueSize == 0)
{
return;
}
string colorSpaceId = Util.BaseType(colorSpaceType);
ColorSpace colorSpace = ParseColorSpace(colorSpaceType);
int colorSpaceSize = ColorSpaceSize(colorSpace);
if (colorSpace == ColorSpace.Unknown || colorSpaceSize == 0)
{
return;
}
Layout layout = ParseChannelMapping(colorSpace, channelMappingType);
if (layout == Layout.Unknown)
{
return;
}
if (channelValueSize != 1 &&
channelValueSize != 2 &&
channelValueSize != 4 &&
channelValueSize != 8)
{
return;
}
// TODO: size_t? ulong?
int bytesCount = width * height * colorSpaceSize * channelValueSize;
byte[] memory = new byte[bytesCount];
bool isLoaded = false;
if (mreader != null)
{
ulong address = ExpressionParser.GetValueAddress(debugger, name + "._memory[0]");
if (address == 0)
{
return;
}
isLoaded = mreader.ReadBytes(address, memory);
}
if (!isLoaded)
{
// Parsing the memory byte by byte may take very long time
// even for small images. So don't do it.
return;
}
LayoutMapper layoutMapper = GetLayoutMapper(layout);
if (layoutMapper == null)
{
return;
}
// Use Pixel format native to Gil Image?
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(width, height);
for (int j = 0; j < height; ++j)
{
for (int i = 0; i < width; ++i)
{
int pixelIndex = (j * width + i);
// The raw bytes are converted into channel values pixel by pixel.
// It could be more efficient to convert all channel values at once first
// and only create pixels from array of channels in this loop.
// Another thing is that when channels are always converted to byte
// the information is lost. This information could be used during potential
// conversion in GetColor() below (cmyk->rgb). Channels could be returned
// as float[]. In practice the eye will probably not notice the difference.
byte[] channels = isPlanar
? GetChannelsPlanar(memory,
pixelIndex,
channelValueKind, channelValueSize, colorSpaceSize)
: GetChannelsInterleaved(memory,
pixelIndex,
channelValueKind, channelValueSize, colorSpaceSize);
if (channels == null)
{
return;
}
System.Drawing.Color c = layoutMapper.GetColor(channels);
bmp.SetPixel(i, j, c);
// TODO: Checked per pixel. Too often?
// But it's the same for geometries (ForEachMemoryBlock).
if (!callback())
{
return;
}
}
}
result = new ExpressionDrawer.Image(bmp);
}
public override Geometry.Traits GetTraits(MemoryReader mreader, Debugger debugger,
string name)
{
return(null);
}
