| public static GetGLOriginFormat ( PixelFormat format ) : int | ||
| format | PixelFormat | Axiom PixelFormat |
| return | int | |
public override void BlitToMemory(BasicBox srcBox, PixelBox dst)
{
if (!this._buffer.Contains(srcBox))
{
throw new ArgumentException("Source box out of range.");
}
if (srcBox.Left == 0 && srcBox.Right == Width && srcBox.Top == 0 && srcBox.Bottom == Height && srcBox.Front == 0 &&
srcBox.Back == Depth && dst.Width == Width && dst.Height == Height && dst.Depth == Depth &&
GLPixelUtil.GetGLOriginFormat(dst.Format) != 0)
{
// The direct case: the user wants the entire texture in a format supported by GL
// so we don't need an intermediate buffer
download(dst);
}
else
{
// Use buffer for intermediate copy
allocateBuffer();
// Download entire buffer
download(this._buffer);
if (srcBox.Width != dst.Width || srcBox.Height != dst.Height || srcBox.Depth != dst.Depth)
{
//TODO Implement Image.Scale
throw new Exception("Image scaling not yet implemented");
// We need scaling
//Image.Scale( _buffer.GetSubVolume( srcBox ), dst, ImageFilter.BiLinear );
}
else
{
// Just copy the bit that we need
PixelConverter.BulkPixelConversion(this._buffer.GetSubVolume(srcBox), dst);
}
freeBuffer();
}
}
public override void CopyContentsToMemory(PixelBox dst, FrameBuffer buffer)
{
if ((dst.Left < 0) || (dst.Right > Width) ||
(dst.Top < 0) || (dst.Bottom > Height) ||
(dst.Front != 0) || (dst.Back != 1))
{
throw new Exception("Invalid box.");
}
if (buffer == RenderTarget.FrameBuffer.Auto)
{
buffer = IsFullScreen ? RenderTarget.FrameBuffer.Front : RenderTarget.FrameBuffer.Back;
}
int format = GLPixelUtil.GetGLOriginFormat(dst.Format);
int type = GLPixelUtil.GetGLOriginDataType(dst.Format);
if ((format == Gl.GL_NONE) || (type == 0))
{
throw new Exception("Unsupported format.");
}
// Switch context if different from current one
RenderSystem rsys = Root.Instance.RenderSystem;
rsys.Viewport = this.GetViewport(0);
// Must change the packing to ensure no overruns!
Gl.glPixelStorei(Gl.GL_PACK_ALIGNMENT, 1);
Gl.glReadBuffer((buffer == RenderTarget.FrameBuffer.Front) ? Gl.GL_FRONT : Gl.GL_BACK);
Gl.glReadPixels(dst.Left, dst.Top, dst.Width, dst.Height, format, type, dst.Data);
// restore default alignment
Gl.glPixelStorei(Gl.GL_PACK_ALIGNMENT, 4);
//vertical flip
{
int rowSpan = dst.Width * PixelUtil.GetNumElemBytes(dst.Format);
int height = dst.Height;
byte[] tmpData = new byte[rowSpan * height];
unsafe
{
var dataPtr = dst.Data.ToBytePointer();
//int *srcRow = (uchar *)dst.data, *tmpRow = tmpData + (height - 1) * rowSpan;
for (int row = height - 1, tmpRow = 0; row >= 0; row--, tmpRow++)
{
for (int col = 0; col < rowSpan; col++)
{
tmpData[tmpRow * rowSpan + col] = dataPtr[row * rowSpan + col];
}
}
}
var tmpDataHandle = BufferBase.Wrap(tmpData);
Memory.Copy(tmpDataHandle, dst.Data, rowSpan * height);
}
}
protected override void download(PixelBox data)
{
if (data.Width != Width || data.Height != Height || data.Depth != Depth)
{
throw new ArgumentException("only download of entire buffer is supported by GL");
}
Gl.glBindTexture(this._target, this._textureId);
if (PixelUtil.IsCompressed(data.Format))
{
if (data.Format != Format || !data.IsConsecutive)
{
throw new ArgumentException("Compressed images must be consecutive, in the source format");
}
// Data must be consecutive and at beginning of buffer as PixelStorei not allowed
// for compressed formate
Gl.glGetCompressedTexImageARB(this._faceTarget, this._level, data.Data.Pin());
data.Data.UnPin();
}
else
{
if (data.Width != data.RowPitch)
{
Gl.glPixelStorei(Gl.GL_PACK_ROW_LENGTH, data.RowPitch);
}
if (data.Height * data.Width != data.SlicePitch)
{
Gl.glPixelStorei(Gl.GL_PACK_IMAGE_HEIGHT, (data.SlicePitch / data.Width));
}
if (((data.Width * PixelUtil.GetNumElemBytes(data.Format)) & 3) != 0)
{
// Standard alignment of 4 is not right
Gl.glPixelStorei(Gl.GL_PACK_ALIGNMENT, 1);
}
// We can only get the entire texture
Gl.glGetTexImage(this._faceTarget, this._level, GLPixelUtil.GetGLOriginFormat(data.Format),
GLPixelUtil.GetGLOriginDataType(data.Format), data.Data.Pin());
data.Data.UnPin();
// Restore defaults
Gl.glPixelStorei(Gl.GL_PACK_ROW_LENGTH, 0);
Gl.glPixelStorei(Gl.GL_PACK_IMAGE_HEIGHT, 0);
Gl.glPixelStorei(Gl.GL_PACK_ALIGNMENT, 4);
}
}
public override void BlitFromMemory(PixelBox src, BasicBox dstBox)
{
PixelBox scaled;
if (!this._buffer.Contains(dstBox))
{
throw new ArgumentException("Destination box out of range.");
}
if (src.Width != dstBox.Width || src.Height != dstBox.Height || src.Depth != dstBox.Depth)
{
// Scale to destination size. Use DevIL and not iluScale because ILU screws up for
// floating point textures and cannot cope with 3D images.
// This also does pixel format conversion if needed
allocateBuffer();
scaled = this._buffer.GetSubVolume(dstBox);
Image.Scale(src, scaled, ImageFilter.Bilinear);
}
else if (GLPixelUtil.GetGLOriginFormat(src.Format) == 0)
{
// Extents match, but format is not accepted as valid source format for GL
// do conversion in temporary buffer
allocateBuffer();
scaled = this._buffer.GetSubVolume(dstBox);
PixelConverter.BulkPixelConversion(src, scaled);
}
else
{
// No scaling or conversion needed
scaled = src;
// Set extents for upload
scaled.Left = dstBox.Left;
scaled.Right = dstBox.Right;
scaled.Top = dstBox.Top;
scaled.Bottom = dstBox.Bottom;
scaled.Front = dstBox.Front;
scaled.Back = dstBox.Back;
}
upload(scaled);
freeBuffer();
}
protected override void upload(PixelBox box)
{
Gl.glBindTexture(this._target, this._textureId);
if (PixelUtil.IsCompressed(box.Format))
{
if (box.Format != Format || !box.IsConsecutive)
{
throw new ArgumentException("Compressed images must be consecutive, in the source format");
}
int format = GLPixelUtil.GetClosestGLInternalFormat(Format);
// Data must be consecutive and at beginning of buffer as PixelStorei not allowed
// for compressed formats
switch (this._target)
{
case Gl.GL_TEXTURE_1D:
Gl.glCompressedTexSubImage1DARB(Gl.GL_TEXTURE_1D, this._level, box.Left, box.Width, format, box.ConsecutiveSize,
box.Data.Pin());
box.Data.UnPin();
break;
case Gl.GL_TEXTURE_2D:
case Gl.GL_TEXTURE_CUBE_MAP:
Gl.glCompressedTexSubImage2DARB(this._faceTarget, this._level, box.Left, box.Top, box.Width, box.Height, format,
box.ConsecutiveSize, box.Data.Pin());
box.Data.UnPin();
break;
case Gl.GL_TEXTURE_3D:
Gl.glCompressedTexSubImage3DARB(Gl.GL_TEXTURE_3D, this._level, box.Left, box.Top, box.Front, box.Width,
box.Height,
box.Depth, format, box.ConsecutiveSize, box.Data.Pin());
box.Data.UnPin();
break;
}
}
else if (this._softwareMipmap)
{
int internalFormat;
Gl.glGetTexLevelParameteriv(this._target, this._level, Gl.GL_TEXTURE_INTERNAL_FORMAT, out internalFormat);
if (box.Width != box.RowPitch)
{
Gl.glPixelStorei(Gl.GL_UNPACK_ROW_LENGTH, box.RowPitch);
}
if (box.Height * box.Width != box.SlicePitch)
{
Gl.glPixelStorei(Gl.GL_UNPACK_IMAGE_HEIGHT, (box.SlicePitch / box.Width));
}
Gl.glPixelStorei(Gl.GL_UNPACK_ALIGNMENT, 1);
switch (this._target)
{
case Gl.GL_TEXTURE_1D:
Glu.gluBuild1DMipmaps(Gl.GL_TEXTURE_1D, internalFormat, box.Width, GLPixelUtil.GetGLOriginFormat(box.Format),
GLPixelUtil.GetGLOriginDataType(box.Format), box.Data.Pin());
box.Data.UnPin();
break;
case Gl.GL_TEXTURE_2D:
case Gl.GL_TEXTURE_CUBE_MAP:
Glu.gluBuild2DMipmaps(this._faceTarget, internalFormat, box.Width, box.Height,
GLPixelUtil.GetGLOriginFormat(box.Format), GLPixelUtil.GetGLOriginDataType(box.Format),
box.Data.Pin());
box.Data.UnPin();
break;
case Gl.GL_TEXTURE_3D:
/* Requires GLU 1.3 which is harder to come by than cards doing hardware mipmapping
* Most 3D textures don't need mipmaps?
* Gl.gluBuild3DMipmaps(
* Gl.GL_TEXTURE_3D, internalFormat,
* box.getWidth(), box.getHeight(), box.getDepth(),
* GLPixelUtil.getGLOriginFormat(box.format), GLPixelUtil.getGLOriginDataType(box.format),
* box.box);
*/
Gl.glTexImage3D(Gl.GL_TEXTURE_3D, 0, internalFormat, box.Width, box.Height, box.Depth, 0,
GLPixelUtil.GetGLOriginFormat(box.Format), GLPixelUtil.GetGLOriginDataType(box.Format),
box.Data.Pin());
box.Data.UnPin();
break;
}
}
else
{
if (box.Width != box.RowPitch)
{
Gl.glPixelStorei(Gl.GL_UNPACK_ROW_LENGTH, box.RowPitch);
}
if (box.Height * box.Width != box.SlicePitch)
{
Gl.glPixelStorei(Gl.GL_UNPACK_IMAGE_HEIGHT, (box.SlicePitch / box.Width));
}
if (((box.Width * PixelUtil.GetNumElemBytes(box.Format)) & 3) != 0)
{
// Standard alignment of 4 is not right
Gl.glPixelStorei(Gl.GL_UNPACK_ALIGNMENT, 1);
}
switch (this._target)
{
case Gl.GL_TEXTURE_1D:
Gl.glTexSubImage1D(Gl.GL_TEXTURE_1D, this._level, box.Left, box.Width,
GLPixelUtil.GetGLOriginFormat(box.Format),
GLPixelUtil.GetGLOriginDataType(box.Format), box.Data.Pin());
box.Data.UnPin();
break;
case Gl.GL_TEXTURE_2D:
case Gl.GL_TEXTURE_CUBE_MAP:
Gl.glTexSubImage2D(this._faceTarget, this._level, box.Left, box.Top, box.Width, box.Height,
GLPixelUtil.GetGLOriginFormat(box.Format), GLPixelUtil.GetGLOriginDataType(box.Format),
box.Data.Pin());
box.Data.UnPin();
break;
case Gl.GL_TEXTURE_3D:
Gl.glTexSubImage3D(Gl.GL_TEXTURE_3D, this._level, box.Left, box.Top, box.Front, box.Width, box.Height, box.Depth,
GLPixelUtil.GetGLOriginFormat(box.Format), GLPixelUtil.GetGLOriginDataType(box.Format),
box.Data.Pin());
box.Data.UnPin();
break;
}
}
// Restore defaults
Gl.glPixelStorei(Gl.GL_UNPACK_ROW_LENGTH, 0);
Gl.glPixelStorei(Gl.GL_UNPACK_IMAGE_HEIGHT, 0);
Gl.glPixelStorei(Gl.GL_UNPACK_ALIGNMENT, 4);
}