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improved layered IAR images composition.

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This commit is contained in:
morkt 2015-10-29 19:58:46 +04:00
parent 46631796b8
commit b9378e2d2b
1 changed files with 51 additions and 15 deletions
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66
ArcFormats/Sas5/ArcIAR.cs
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@ -213,11 +213,14 @@ namespace GameRes.Formats.Sas5
IarImage CombineLayers (IarImage layers, IarArchive iarc)
{
layers.Info.Stride = (int)layers.Info.Width * 4;
layers.Info.BPP = 32;
var pixels = new byte[layers.Info.Stride * (int)layers.Info.Height];
var output = new IarImage (layers.Info, pixels);
using (var mem = new MemoryStream (layers.Data))
using (var input = new BinaryReader (mem))
{
int offset_x = 0, offset_y = 0;
IarImage output = null;
var dir = (List<Entry>)iarc.Dir;
while (input.BaseStream.Position < input.BaseStream.Length)
{
@ -230,27 +233,23 @@ namespace GameRes.Formats.Sas5
break;
case 0x00:
case 0x20:
{
int index = input.ReadInt32();
if (index >= dir.Count)
if (index < 0 || index >= dir.Count)
throw new InvalidFormatException ("Invalid image layer index");
var layer = new IarImage (iarc, dir[index]);
layer.Info.OffsetX -= offset_x;
layer.Info.OffsetY -= offset_y;
if (null == output)
{
output = layer;
}
if (0x20 == cmd)
output.ApplyMask (layer);
else
{
output.Blend (layer);
}
}
break;
case 0x20:
default:
Trace.WriteLine (string.Format ("Unknown layer type 0x%02X", cmd), "IAR");
Trace.WriteLine (string.Format ("Unknown layer type 0x{0:X2}", cmd), "IAR");
break;
}
}
@ -328,6 +327,9 @@ namespace GameRes.Formats.Sas5
public void Blend (IarImage overlay)
{
int pixel_size = Info.Stride / (int)Info.Width;
if (pixel_size < 4)
return;
var self = new Rectangle (-Info.OffsetX, -Info.OffsetY, (int)Info.Width, (int)Info.Height);
var src = new Rectangle (-overlay.Info.OffsetX, -overlay.Info.OffsetY,
(int)overlay.Info.Width, (int)overlay.Info.Height);
@ -338,12 +340,11 @@ namespace GameRes.Formats.Sas5
src.Y = blend.Top - src.Top;
src.Width = blend.Width;
src.Height= blend.Height;
int x = blend.Left - self.Left;
int y = blend.Top - self.Top;
if (src.Width <= 0 || src.Height <= 0)
return;
int pixel_size = Info.Stride / (int)Info.Width;
int x = blend.Left - self.Left;
int y = blend.Top - self.Top;
int dst = y * Info.Stride + x * pixel_size;
int ov = src.Top * overlay.Info.Stride + src.Left * pixel_size;
for (int row = 0; row < src.Height; ++row)
@ -351,9 +352,9 @@ namespace GameRes.Formats.Sas5
for (int col = 0; col < src.Width; ++col)
{
int src_pixel = ov + col*pixel_size;
if (pixel_size > 3 && overlay.Data[src_pixel+3] > 0)
{
int src_alpha = overlay.Data[src_pixel+3];
if (src_alpha > 0)
{
int dst_pixel = dst + col*pixel_size;
if (0xFF == src_alpha || 0 == m_output[dst_pixel+3])
{
@ -375,6 +376,41 @@ namespace GameRes.Formats.Sas5
ov += overlay.Info.Stride;
}
}
public void ApplyMask (IarImage mask)
{
int pixel_size = Info.Stride / (int)Info.Width;
if (pixel_size < 4 || mask.Info.BPP != 8)
return;
var self = new Rectangle (-Info.OffsetX, -Info.OffsetY, (int)Info.Width, (int)Info.Height);
var mask_region = new Rectangle (-mask.Info.OffsetX, -mask.Info.OffsetY,
(int)mask.Info.Width, (int)mask.Info.Height);
var masked = Rectangle.Intersect (self, mask_region);
if (masked.IsEmpty)
return;
mask_region.X = masked.Left - mask_region.Left;
mask_region.Y = masked.Top - mask_region.Top;
mask_region.Width = masked.Width;
mask_region.Height= masked.Height;
if (mask_region.Width <= 0 || mask_region.Height <= 0)
return;
int x = masked.Left - self.Left;
int y = masked.Top - self.Top;
int dst = y * Info.Stride + x * pixel_size;
int src = mask_region.Top * mask.Info.Stride + mask_region.Left;
for (int row = 0; row < mask_region.Height; ++row)
{
int dst_pixel = dst+3;
for (int col = 0; col < mask_region.Width; ++col)
{
m_output[dst_pixel] = mask.Data[src+col];
dst_pixel += pixel_size;
}
dst += Info.Stride;
src += mask.Info.Stride;
}
}
}
internal sealed class IarDecompressor : IDisposable