void NormalCompressorDXT1::compressBlock(ColorSet & set, nvtt::AlphaMode alphaMode, const nvtt::CompressionOptions::Private & compressionOptions, void * output)
{
set.setUniformWeights();
set.createMinimalSet(false);
ClusterFit fit;
fit.setMetric(compressionOptions.colorWeight);
BlockDXT1 * block = new(output) BlockDXT1;
if (set.isSingleColor(true))
{
Color32 c;
c.r = uint8(clamp(set.colors[0].x, 0.0f, 1.0f) * 255);
c.g = uint8(clamp(set.colors[0].y, 0.0f, 1.0f) * 255);
c.b = uint8(clamp(set.colors[0].z, 0.0f, 1.0f) * 255);
c.a = 255;
OptimalCompress::compressDXT1(c, block);
}
else
{
fit.setColourSet(&set);
Vector3 start, end;
fit.compress4(&start, &end);
QuickCompress::outputBlock4(set, start, end, block);
if (fit.compress3(&start, &end)) {
QuickCompress::outputBlock3(set, start, end, block);
}
}
}
ColorSet * Solid::getColors()
{
ColorSet * newColors = new ColorSet();
for(int i = 0; i < colors.length(); i++)
{
newColors->AddColor(colors[i]);
}
return newColors;
}
// Each task compresses one block.
void ColorSetCompressorTask(void * data, int i)
{
ColorSetCompressorContext * d = (ColorSetCompressorContext *) data;
uint x = i % d->bw;
uint y = i / d->bw;
//for (uint x = 0; x < d->bw; x++)
{
ColorSet set;
set.setColors(d->data, d->w, d->h, x * 4, y * 4);
uint8 * ptr = d->mem + (y * d->bw + x) * d->bs;
d->compressor->compressBlock(set, d->alphaMode, *d->compressionOptions, ptr);
}
}
void ProductionCompressorBC5_Luma::compressBlock(ColorSet & set, nvtt::AlphaMode alphaMode, const nvtt::CompressionOptions::Private & compressionOptions, void * output)
{
BlockATI2 * block = new(output) BlockATI2;
AlphaBlock4x4 tmp;
tmp.init(set, /*channel=*/0);
OptimalCompress::compressDXT5A(tmp, &block->x);
// Decode block->x
AlphaBlock4x4 decoded;
block->x.decodeBlock(&decoded);
const float R = 1.0f / 256.0f; // Maximum residual that we can represent. @@ Tweak this.
// Compute residual block.
for (int i = 0; i < 16; i++) {
float in = set.color(i).x; // [0,1]
float out = float(decoded.alpha[i]) / 255.0f; // [0,1]
float residual = (out - in); // [-1,1], but usually [-R,R]
// Normalize residual to [-1,1] range.
residual /= R;
// Pack in [0,1] range.
residual = residual * 0.5f + 0.5f;
tmp.alpha[i] = nv::ftoi_round(nv::saturate(residual) * 255.0f);
}
OptimalCompress::compressDXT5A(tmp, &block->y);
}
virtual void visit(AstNode* nodep) {
if (nodep->user3p()) {
SplitLogicVertex* vertexp = (SplitLogicVertex*)(nodep->user3p());
uint32_t color = vertexp->color();
m_colors.insert(color);
UINFO(8, " SVL " << vertexp << " has color " << color << "\n");
// Record that all containing ifs have this color.
for (IfStack::const_iterator it = m_ifStack.begin();
it != m_ifStack.end(); ++it) {
m_ifColors[*it].insert(color);
}
}
iterateChildren(nodep);
}
void CompressorBC7::compressBlock(ColorSet & tile, AlphaMode alphaMode, const CompressionOptions::Private & compressionOptions, void * output)
{
// !!!UNDONE: support channel weights
// !!!UNDONE: set flags once, not per block (this is especially sketchy since block compression is multithreaded...)
AVPCL::mode_rgb = false;
AVPCL::flag_premult = (alphaMode == AlphaMode_Premultiplied);
AVPCL::flag_nonuniform = false;
AVPCL::flag_nonuniform_ati = false;
// Convert NVTT's tile struct to AVPCL's.
AVPCL::Tile avpclTile(tile.w, tile.h);
memset(avpclTile.data, 0, sizeof(avpclTile.data));
for (uint y = 0; y < tile.h; ++y)
for (uint x = 0; x < tile.w; ++x)
avpclTile.data[y][x] = tile.color(x, y) * 255.0f;
AVPCL::compress(avpclTile, (char *)output);
}
void CompressorBC6::compressBlock(ColorSet & tile, AlphaMode alphaMode, const CompressionOptions::Private & compressionOptions, void * output)
{
// !!!UNDONE: support channel weights
// !!!UNDONE: set flags once, not per block (this is especially sketchy since block compression is multithreaded...)
NV_UNUSED(alphaMode); // ZOH does not support alpha.
if (compressionOptions.pixelType == PixelType_UnsignedFloat ||
compressionOptions.pixelType == PixelType_UnsignedNorm ||
compressionOptions.pixelType == PixelType_UnsignedInt)
{
ZOH::Utils::FORMAT = ZOH::UNSIGNED_F16;
}
else
{
ZOH::Utils::FORMAT = ZOH::SIGNED_F16;
}
// Convert NVTT's tile struct to ZOH's, and convert float to half.
ZOH::Tile zohTile(tile.w, tile.h);
memset(zohTile.data, 0, sizeof(zohTile.data));
memset(zohTile.importance_map, 0, sizeof(zohTile.importance_map));
for (uint y = 0; y < tile.h; ++y)
{
for (uint x = 0; x < tile.w; ++x)
{
Vector3 color = tile.color(x, y).xyz();
uint16 rHalf = to_half(color.x);
uint16 gHalf = to_half(color.y);
uint16 bHalf = to_half(color.z);
zohTile.data[y][x].x = ZOH::Tile::half2float(rHalf);
zohTile.data[y][x].y = ZOH::Tile::half2float(gHalf);
zohTile.data[y][x].z = ZOH::Tile::half2float(bHalf);
zohTile.importance_map[y][x] = 1.0f;
}
}
ZOH::compress(zohTile, (char *)output);
}
int BuddhabrotSketch::GetGroup(double th, Complex *pts, GLcolor *cols, int n)
{
ColorSet colorset;
colorset.fromHues(BASIC_HUE_SET, 10, 0.9, 1.0);
colorset.offsetHues(270); // ?
// shorthand path
Path *pPath = ((Path*)(m_pPath.get()));
ASSERT(n>=GetGroupSize());
int count = 0;
Complex c, z;
for(int j=0; j<pPath->getGroupSize(); ++j)
{
c = pPath->get(th, j);
z = c;
int i;
for(i=0; i<m_nMaxIter; ++i)
{
z = (z*z + c);
if(normal(z) > 4.0)
break;
}
// slight alteration here:
// we're not going to plot short orbits, only
// interesting ones whose length is at least MinIter.
if(i < m_nMaxIter && i >= m_nMinIter)
{
// plot this point's orbit, until it hits the bailout value
int nStopIter = i;
z = c;
for(i=0; i<=nStopIter; ++i) // was i<=m_nMaxIter
{
z = (z*z) + c;
pts[count] = z;
// color according to...
switch(m_nColorScheme)
{
case 0:
// abs(c)?
cols[count].SetHSV(360*log(abs(c)), 0.9, 0.9, m_fBrightness);
break;
case 1:
// iter? (busy)
// cols[count].SetHSV((i-m_nMinIter)*360.0/(m_nMaxIter-m_nMinIter+1), 0.9, 0.9, m_fBrightness);
cols[count].SetHSV((i*360.0/m_nMaxIter), 0.9, 0.9, m_fBrightness);
break;
case 2:
// c.arg?
cols[count].SetHSV(arg(c)*360.0/6.283, 0.9, 0.9, m_fBrightness);
break;
case 3:
// ring index? (this makes bright figures with little or no blur)
cols[count].SetHSV(j*360.0/pPath->getGroupSize(), 0.9, 0.9, m_fBrightness);
break;
case 4:
// stopiter?
cols[count].SetHSV((nStopIter-m_nMinIter)*360.0/(m_nMaxIter-m_nMinIter+1), 0.9, 0.9, m_fBrightness);
}
++count;
}
}
}
ASSERT(count <= n);
return count;
}