| public evaluatePalette ( byte alpha, bool d3d9 ) : void | ||
| alpha | byte | |
| d3d9 | bool | |
| return | void | |
/*static uint computeAlphaError8( ColorBlock & rgba, AlphaBlockDXT5 * block, int bestError = INT_MAX)
* {
* int totalError = 0;
*
* for (uint i = 0; i < 16; i++)
* {
* byte alpha = rgba.color[i].a;
*
* totalError += alphaDistance(alpha, nearestAlpha8(alpha, block.alpha0, block.alpha1));
*
* if (totalError > bestError)
* {
* // early out
* return totalError;
* }
* }
*
* return totalError;
* }*/
static float computeAlphaError(AlphaBlock4x4 src, AlphaBlockDXT5 dst, float bestError = float.MaxValue)
{
byte[] alphas = new byte[8];
dst.evaluatePalette(alphas, false); // @@ Use target decoder.
float totalError = 0;
for (uint i = 0; i < 16; i++)
{
byte alpha = src.alpha[i];
uint minDist = int.MaxValue;
for (uint p = 0; p < 8; p++)
{
uint dist = alphaDistance(alpha, alphas[p]);
minDist = Math.Min(dist, minDist);
}
totalError += minDist * src.weights[i];
if (totalError > bestError)
{
// early out
return(totalError);
}
}
return(totalError);
}
static uint computeAlphaIndices(AlphaBlock4x4 src, AlphaBlockDXT5 block)
{
byte[] alphas = new byte[8];
block.evaluatePalette(alphas, false); // @@ Use target decoder.
uint totalError = 0;
for (uint i = 0; i < 16; i++)
{
byte alpha = src.alpha[i];
uint besterror = 256 * 256;
uint best = 8;
for (uint p = 0; p < 8; p++)
{
int d = alphas[p] - alpha;
uint error = (uint)(d * d);
if (error < besterror)
{
besterror = error;
best = p;
}
}
//nvDebugCheck(best < 8);
totalError += besterror;
block.setIndex(i, best);
}
return(totalError);
}
static float computeAlphaError_RGBM(ColorSet src, ColorBlock RGB, AlphaBlockDXT5 dst, float bestError = float.MaxValue)
{
byte[] alphas = new byte[8];
dst.evaluatePalette(alphas, /*d3d9=*/ false); // @@ Use target decoder.
float totalError = 0;
for (uint i = 0; i < 16; i++)
{
float R = src.color[i].x;
float G = src.color[i].y;
float B = src.color[i].z;
float r = (float)(RGB.color[i].r) / 255.0f;
float g = (float)(RGB.color[i].g) / 255.0f;
float b = (float)(RGB.color[i].b) / 255.0f;
float minDist = float.MaxValue;
for (uint p = 0; p < 8; p++)
{
// Compute M.
float M = (float)(alphas[p]) / 255.0f * (1 - threshold) + threshold;
// Decode color.
float fr = r * M;
float fg = g * M;
float fb = b * M;
// Measure error.
float error = Mathf.Pow(R - fr, 2) + Mathf.Pow(G - fg, 2) + Mathf.Pow(B - fb, 2);
minDist = Mathf.Min(error, minDist);
}
totalError += minDist * src.weights[i];
if (totalError > bestError)
{
// early out
return(totalError);
}
}
return(totalError);
}
static void computeAlphaIndices_RGBM(ColorSet src, ColorBlock RGB, AlphaBlockDXT5 dst)
{
byte[] alphas = new byte[8];
dst.evaluatePalette(alphas, /*d3d9=*/ false); // @@ Use target decoder.
for (uint i = 0; i < 16; i++)
{
float R = src.color[i].x;
float G = src.color[i].y;
float B = src.color[i].z;
float r = (float)(RGB.color[i].r) / 255.0f;
float g = (float)(RGB.color[i].g) / 255.0f;
float b = (float)(RGB.color[i].b) / 255.0f;
float minDist = float.MaxValue;
uint bestIndex = 8;
for (uint p = 0; p < 8; p++)
{
// Compute M.
float M = (float)(alphas[p]) / 255.0f * (1 - threshold) + threshold;
// Decode color.
float fr = r * M;
float fg = g * M;
float fb = b * M;
// Measure error.
float error = Mathf.Pow(R - fr, 2) + Mathf.Pow(G - fg, 2) + Mathf.Pow(B - fb, 2);
if (error < minDist)
{
minDist = error;
bestIndex = p;
}
}
dst.setIndex(i, bestIndex);
}
}
static void computeAlphaIndices(AlphaBlock4x4 src, AlphaBlockDXT5 dst)
{
byte[] alphas = new byte[8];
dst.evaluatePalette(alphas, /*d3d9=*/ false); // @@ Use target decoder.
for (uint i = 0; i < 16; i++)
{
byte alpha = src.alpha[i];
uint minDist = int.MaxValue;
uint bestIndex = 8;
for (uint p = 0; p < 8; p++)
{
uint dist = alphaDistance(alpha, alphas[p]);
if (dist < minDist)
{
minDist = dist;
bestIndex = p;
}
}
dst.setIndex(i, bestIndex);
}
}
static void computeAlphaIndices_RGBM(ColorSet src, ColorBlock RGB, AlphaBlockDXT5 dst)
{
byte[] alphas = new byte[8];
dst.evaluatePalette(alphas, /*d3d9=*/false); // @@ Use target decoder.
for (uint i = 0; i < 16; i++)
{
float R = src.color[i].x;
float G = src.color[i].y;
float B = src.color[i].z;
float r = (float)(RGB.color[i].r) / 255.0f;
float g = (float)(RGB.color[i].g) / 255.0f;
float b = (float)(RGB.color[i].b) / 255.0f;
float minDist = float.MaxValue;
uint bestIndex = 8;
for (uint p = 0; p < 8; p++)
{
// Compute M.
float M = (float)(alphas[p]) / 255.0f * (1 - threshold) + threshold;
// Decode color.
float fr = r * M;
float fg = g * M;
float fb = b * M;
// Measure error.
float error = Mathf.Pow(R - fr, 2) + Mathf.Pow(G - fg, 2) + Mathf.Pow(B - fb, 2);
if (error < minDist)
{
minDist = error;
bestIndex = p;
}
}
dst.setIndex(i, bestIndex);
}
}
static void computeAlphaIndices(AlphaBlock4x4 src, AlphaBlockDXT5 dst)
{
byte[] alphas = new byte[8];
dst.evaluatePalette(alphas, /*d3d9=*/false); // @@ Use target decoder.
for (uint i = 0; i < 16; i++)
{
byte alpha = src.alpha[i];
uint minDist = int.MaxValue;
uint bestIndex = 8;
for (uint p = 0; p < 8; p++)
{
uint dist = alphaDistance(alpha, alphas[p]);
if (dist < minDist)
{
minDist = dist;
bestIndex = p;
}
}
dst.setIndex(i, bestIndex);
}
}
static float computeAlphaError_RGBM(ColorSet src, ColorBlock RGB, AlphaBlockDXT5 dst, float bestError = float.MaxValue)
{
byte[] alphas = new byte[8];
dst.evaluatePalette(alphas, /*d3d9=*/false); // @@ Use target decoder.
float totalError = 0;
for (uint i = 0; i < 16; i++)
{
float R = src.color[i].x;
float G = src.color[i].y;
float B = src.color[i].z;
float r = (float)(RGB.color[i].r) / 255.0f;
float g = (float)(RGB.color[i].g) / 255.0f;
float b = (float)(RGB.color[i].b) / 255.0f;
float minDist = float.MaxValue;
for (uint p = 0; p < 8; p++)
{
// Compute M.
float M = (float)(alphas[p]) / 255.0f * (1 - threshold) + threshold;
// Decode color.
float fr = r * M;
float fg = g * M;
float fb = b * M;
// Measure error.
float error = Mathf.Pow(R - fr, 2) + Mathf.Pow(G - fg, 2) + Mathf.Pow(B - fb, 2);
minDist = Mathf.Min(error, minDist);
}
totalError += minDist * src.weights[i];
if (totalError > bestError)
{
// early out
return totalError;
}
}
return totalError;
}
/*static uint computeAlphaError8( ColorBlock & rgba, AlphaBlockDXT5 * block, int bestError = INT_MAX)
{
int totalError = 0;
for (uint i = 0; i < 16; i++)
{
byte alpha = rgba.color[i].a;
totalError += alphaDistance(alpha, nearestAlpha8(alpha, block.alpha0, block.alpha1));
if (totalError > bestError)
{
// early out
return totalError;
}
}
return totalError;
}*/
static float computeAlphaError(AlphaBlock4x4 src, AlphaBlockDXT5 dst, float bestError = float.MaxValue)
{
byte[] alphas = new byte[8];
dst.evaluatePalette(alphas, false); // @@ Use target decoder.
float totalError = 0;
for (uint i = 0; i < 16; i++)
{
byte alpha = src.alpha[i];
uint minDist = int.MaxValue;
for (uint p = 0; p < 8; p++)
{
uint dist = alphaDistance(alpha, alphas[p]);
minDist = Math.Min(dist, minDist);
}
totalError += minDist * src.weights[i];
if (totalError > bestError)
{
// early out
return totalError;
}
}
return totalError;
}