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- fixed some imprecisions in font luminosity calculation.

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This was still going through the palette which could result in off-by-one errors.
This commit is contained in:
Christoph Oelckers 2021-10-07 00:13:34 +02:00
parent 60bf096912
commit 19aac25f19
1 changed files with 28 additions and 7 deletions
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35
src/common/fonts/font.cpp
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@ -570,6 +570,32 @@ void RecordTextureColors (FImageSource *pic, uint32_t *usedcolors)
}
}
//==========================================================================
//
// RecordLuminosity
//
// Records minimum and maximum luminosity of a texture.
//
//==========================================================================
static void RecordLuminosity(FImageSource* pic, int* minlum, int* maxlum)
{
auto bitmap = pic->GetCachedBitmap(nullptr, FImageSource::normal);
auto pixels = bitmap.GetPixels();
auto size = pic->GetWidth() * pic->GetHeight();
for (int x = 0; x < size; x++)
{
int xx = x * 4;
if (pixels[xx + 3] > 0)
{
int lum = Luminance(pixels[xx + 2], pixels[xx + 1], pixels[xx]);
if (lum < *minlum) *minlum = lum;
if (lum > *maxlum) *maxlum = lum;
}
}
}
//==========================================================================
//
// RecordAllTextureColors
@ -969,27 +995,22 @@ int FFont::GetMaxAscender(const uint8_t* string) const
void FFont::LoadTranslations()
{
unsigned int count = min<unsigned>(Chars.Size(), LastChar - FirstChar + 1);
uint32_t usedcolors[256] = {};
TArray<double> Luminosity;
if (count == 0) return;
int minlum = 255, maxlum = 0;
for (unsigned int i = 0; i < count; i++)
{
if (Chars[i].OriginalPic)
{
auto pic = Chars[i].OriginalPic->GetTexture()->GetImage();
if (pic) RecordTextureColors(pic, usedcolors);
RecordLuminosity(pic, &minlum, &maxlum);
}
}
int minlum = 0, maxlum = 0;
GetLuminosity (usedcolors, Luminosity, &minlum, &maxlum);
if (MinLum >= 0 && MinLum < minlum) minlum = MinLum;
if (MaxLum > maxlum) maxlum = MaxLum;
// Here we can set everything to a luminosity translation.
// Create different translations for different color ranges
Translations.Resize(NumTextColors);
for (int i = 0; i < NumTextColors; i++)
{