void BurnMain::make_palette(int color_model)
{
int i, r, g, b;
for(i = 0; i < MAXCOLOR; i++)
{
HSItoRGB(4.6 - 1.5 * i / MAXCOLOR,
(double)i / MAXCOLOR,
(double)i / MAXCOLOR,
&r,
&g,
&b,
color_model);
palette[0][i] = r;
palette[1][i] = g;
palette[2][i] = b;
//printf("BurnMain::make_palette %d %d %d %d\n", i, palette[0][i], palette[1][i], palette[2][i]);
}
for(i = MAXCOLOR; i < 256; i++)
{
if(r < 255) r++;
if(r < 255) r++;
if(r < 255) r++;
if(g < 255) g++;
if(g < 255) g++;
if(b < 255) b++;
if(b < 255) b++;
palette[0][i] = r;
palette[1][i] = g;
palette[2][i] = b;
//printf("BurnMain::make_palette %d %d %d %d\n", i, palette[0][i], palette[1][i], palette[2][i]);
}
}
void VolumeTexture::generateIndexTexture() {
// nice small texture that will work everywhere
size[0] = size[1] = size[2] = 32;
int x, y, z;
int addr, addr2, addr3, index;
int num = size[0]*size[1]*size[2];
unsigned char coltable[3 * 4096];
if (!allocateTextureMap(num)) return;
// build a fast color lookup table
for (index=0; index<4096; index++) {
addr = index * 3;
HSItoRGB(8.0f * index / 4096.0f, 0.75, 1.0,
coltable+addr, coltable+addr+1, coltable+addr+2);
}
for (z=0; z<size[2]; z++) {
for (y=0; y<size[1]; y++) {
addr = z * size[0] * size[1] + y * size[0];
for (x=0; x<size[0]; x++) {
index = addr + x;
addr2 = index * 3;
addr3 = ((int) ((index / (float) num) * 4095)) * 3;
texmap[addr2 ] = coltable[addr3 ];
texmap[addr2 + 1] = coltable[addr3 + 1];
texmap[addr2 + 2] = coltable[addr3 + 2];
}
}
}
}
void VolumeTexture::generateHSVTexture(float vmin, float vmax) {
int x, y, z;
int index, addr, addr2, addr3;
int daddr;
float vscale, vrange;
unsigned char coltable[3 * 4096];
size[0] = v->xsize;
size[1] = v->ysize;
size[2] = v->zsize;
for (int i=0; i<3; i++) {
size[i] = nextpower2(size[i]);
}
int num = size[0]*size[1]*size[2];
if (!allocateTextureMap(num)) return;
// build a fast color lookup table
for (index=0; index<4096; index++) {
addr = index * 3;
HSItoRGB(4.0f * index / 4096.0f, 0.75, 1.0,
coltable+addr, coltable+addr+1, coltable+addr+2);
}
// calculate scaling factors
vrange = vmax - vmin;
if (fabs(vrange) < 0.00001)
vscale = 0.0f;
else
vscale = 1.00001f / vrange;
// map volume data scalars to colors
for (z=0; z<v->zsize; z++) {
for (y=0; y<v->ysize; y++) {
addr = z * size[0] * size[1] + y * size[0];
daddr = z * v->xsize * v->ysize + y * v->xsize;
for (x=0; x<v->xsize; x++) {
addr2 = (addr + x) * 3;
float level;
// map data to range 0->1
level = (v->data[daddr + x] - vmin) * vscale;
level = level < 0 ? 0 :
level > 1 ? 1 : level;
// map values to an HSV color map
addr3 = ((int) (level * 4095)) * 3;
texmap[addr2 ] = coltable[addr3 ];
texmap[addr2 + 1] = coltable[addr3 + 1];
texmap[addr2 + 2] = coltable[addr3 + 2];
}
}
}
}
static void makePalette(void)
{
int i, r, g, b;
uint8_t *p = (uint8_t*) palette;
for(i=0; i<MaxColor; i++) {
HSItoRGB(4.6-1.5*i/MaxColor, (double)i/MaxColor, (double)i/MaxColor, &r, &g, &b);
*p++ = r & 0xfe;
*p++ = g & 0xfe;
*p++ = b & 0xfe;
p++;
}
for(i=MaxColor; i<256; i++) {
if(r<255)r++;if(r<255)r++;if(r<255)r++;
if(g<255)g++;
if(g<255)g++;
if(b<255)b++;
if(b<255)b++;
*p++ = r & 0xfe;
*p++ = g & 0xfe;
*p++ = b & 0xfe;
p++;
}
}
