public void on_glTexSubImage2D(int level, int xoffset, int yoffset, int width, int height,
uint format, uint type, byte[] pixels, int offset)
{
if (width <= 0 || height <= 0 || pixels.Length == offset)
{
return;
}
KPMipmapLevel mip = m_pMipmaps[level];
if (mip.Width == 0 || mip.Height == 0 || mip.Pixels == null)
{
return;
}
int dst_bytesPP = mip.getBPP() / 8;
int src_bytesPP = KPMipmapLevel.getTexBPP((int)format, type) / 8;
for (int row = yoffset; row < yoffset + height; row++)
{
// TODO: row order???
//int j2 = mip.Height - 1 - j;
int row2 = row;
for (int col = xoffset; col < xoffset + width; col++)
{
int pixelIndex = row2 * mip.Width + col;
Utils.convertTexSubPixel(mip.Pixels, pixelIndex * dst_bytesPP, pixels, offset, format, mip.Type, type);
//Utils.memcpy(mip.Pixels, pixelIndex * bytesPP, pixels, offset, bytesPP);
offset += src_bytesPP;
}
}
}
public static void convertTexSubPixel(byte[] dst, int dstOffset, byte[] src, int srcOffset,
uint format, uint dstType, uint srcType)
{
int dst_bytesPP = KPMipmapLevel.getTexBPP((int)format, dstType) / 8;
if (dstType == srcType)
{
Utils.memcpy(dst, dstOffset, src, srcOffset, dst_bytesPP);
return;
}
int src_bytesPP = KPMipmapLevel.getTexBPP((int)format, srcType) / 8;
if (format == gl2.GL_RGBA)
{
if (srcType == gl2.GL_UNSIGNED_BYTE && dstType == gl2.GL_UNSIGNED_SHORT_4_4_4_4)
{
UInt16 dst16;
// Note: swap RB
dst16 = (UInt16)(CONVERT(src[srcOffset + 2], 8, 4) << 12);
dst16 |= (UInt16)(CONVERT(src[srcOffset + 1], 8, 4) << 8);
dst16 |= (UInt16)(CONVERT(src[srcOffset], 8, 4) << 4);
dst16 |= (UInt16)(CONVERT(src[srcOffset + 3], 8, 4));
dst[dstOffset] = (byte)((dst16 >> 8) & 0xFF);
dst[dstOffset + 1] = (byte)((dst16) & 0xFF);
}
else if (srcType == gl2.GL_UNSIGNED_BYTE && dstType == gl2.GL_UNSIGNED_SHORT_5_5_5_1)
{
UInt16 dst16;
// Note: swap RB
dst16 = (UInt16)(CONVERT(src[srcOffset + 2], 8, 5) << 11);
dst16 |= (UInt16)(CONVERT(src[srcOffset + 1], 8, 5) << 6);
dst16 |= (UInt16)(CONVERT(src[srcOffset], 8, 5) << 1);
dst16 |= (UInt16)(CONVERT(src[srcOffset + 3], 8, 1));
dst[dstOffset] = (byte)((dst16 >> 8) & 0xFF);
dst[dstOffset + 1] = (byte)((dst16) & 0xFF);
}
else if (srcType == gl2.GL_UNSIGNED_SHORT_4_4_4_4 && dstType == gl2.GL_UNSIGNED_BYTE)
{
UInt16 tmp0 = (UInt16)src[srcOffset];
UInt16 tmp1 = (UInt16)src[srcOffset + 1];
UInt16 src16 = (UInt16)((tmp0 << 8) | tmp1);
// Note: swap RB
dst[dstOffset + 2] = (byte)CONVERT((src16 >> 12) & 0xF, 4, 8);
dst[dstOffset + 1] = (byte)CONVERT((src16 >> 8) & 0xF, 4, 8);
dst[dstOffset] = (byte)CONVERT((src16 >> 4) & 0xF, 4, 8);
dst[dstOffset + 3] = (byte)CONVERT((src16) & 0xF, 4, 8);
}
else if (srcType == gl2.GL_UNSIGNED_SHORT_4_4_4_4 && dstType == gl2.GL_UNSIGNED_SHORT_5_5_5_1)
{
UInt16 tmp0 = (UInt16)src[srcOffset];
UInt16 tmp1 = (UInt16)src[srcOffset + 1];
UInt16 src16 = (UInt16)((tmp0 << 8) | tmp1);
UInt16 dst16;
dst16 = (UInt16)(CONVERT((src16 >> 12) & 0xF, 4, 5) << 11);
dst16 |= (UInt16)(CONVERT((src16 >> 8) & 0xF, 4, 5) << 6);
dst16 |= (UInt16)(CONVERT((src16 >> 4) & 0xF, 4, 5) << 1);
dst16 |= (UInt16)(CONVERT((src16) & 0xF, 4, 1));
dst[dstOffset] = (byte)((dst16 >> 8) & 0xFF);
dst[dstOffset + 1] = (byte)((dst16) & 0xFF);
}
else if (srcType == gl2.GL_UNSIGNED_SHORT_5_5_5_1 && dstType == gl2.GL_UNSIGNED_BYTE)
{
UInt16 tmp0 = (UInt16)src[srcOffset];
UInt16 tmp1 = (UInt16)src[srcOffset + 1];
UInt16 src16 = (UInt16)((tmp0 << 8) | tmp1);
// Note: swap RB
dst[dstOffset + 2] = (byte)CONVERT((src16 >> 11) & 0x1F, 5, 8);
dst[dstOffset + 1] = (byte)CONVERT((src16 >> 6) & 0x1F, 5, 8);
dst[dstOffset] = (byte)CONVERT((src16 >> 1) & 0x1F, 5, 8);
dst[dstOffset + 3] = (byte)CONVERT((src16) & 0x01, 1, 8);
}
else if (srcType == gl2.GL_UNSIGNED_SHORT_5_5_5_1 && dstType == gl2.GL_UNSIGNED_SHORT_4_4_4_4)
{
UInt16 tmp0 = (UInt16)src[srcOffset];
UInt16 tmp1 = (UInt16)src[srcOffset + 1];
UInt16 src16 = (UInt16)((tmp0 << 8) | tmp1);
UInt16 dst16;
dst16 = (UInt16)(CONVERT((src16 >> 11) & 0x1F, 5, 4) << 12);
dst16 |= (UInt16)(CONVERT((src16 >> 6) & 0x1F, 5, 4) << 8);
dst16 |= (UInt16)(CONVERT((src16 >> 1) & 0x1F, 5, 4) << 4);
dst16 |= (UInt16)(CONVERT((src16) & 0x01, 1, 4));
dst[dstOffset] = (byte)((dst16 >> 8) & 0xFF);
dst[dstOffset + 1] = (byte)((dst16) & 0xFF);
}
}
else // (format == gl2.GL_RGB)
{
if (srcType == gl2.GL_UNSIGNED_BYTE && dstType == gl2.GL_UNSIGNED_SHORT_5_6_5)
{
UInt16 dst16;
// Note: swap RB
dst16 = (UInt16)(CONVERT(src[srcOffset + 2], 8, 5) << 11);
dst16 |= (UInt16)(CONVERT(src[srcOffset + 1], 8, 6) << 5);
dst16 |= (UInt16)(CONVERT(src[srcOffset], 8, 5));
dst[dstOffset] = (byte)((dst16 >> 8) & 0xFF);
dst[dstOffset + 1] = (byte)((dst16) & 0xFF);
}
else if (srcType == gl2.GL_UNSIGNED_SHORT_5_6_5 && dstType == gl2.GL_UNSIGNED_BYTE)
{
UInt16 tmp0 = (UInt16)src[srcOffset];
UInt16 tmp1 = (UInt16)src[srcOffset + 1];
UInt16 src16 = (UInt16)((tmp0 << 8) | tmp1); //25700
// Note: swap RB
dst[dstOffset + 2] = (byte)CONVERT((src16 >> 11) & 0x1F, 5, 8);
dst[dstOffset + 1] = (byte)CONVERT((src16 >> 5) & 0x3F, 6, 8);
dst[dstOffset] = (byte)CONVERT((src16) & 0x1F, 5, 8);
}
}
}