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Cine::Palette: Add fillWithBlack and saturatedAddNormalizedGray-methods.

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svn-id: r39676
This commit is contained in:
Kari Salminen 2009-03-24 21:45:35 +00:00
parent b85b6929bd
commit 51751cd069
2 changed files with 23 additions and 0 deletions
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20
engines/cine/pal.cpp
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@ -211,6 +211,16 @@ uint Palette::colorCount() const {
return _colors.size();
}
Palette &Palette::fillWithBlack() {
for (uint i = 0; i < _colors.size(); i++) {
_colors[i].r = 0;
_colors[i].g = 0;
_colors[i].b = 0;
}
return *this;
}
EndianType Palette::endianType() const {
return (_bigEndian ? CINE_BIG_ENDIAN : CINE_LITTLE_ENDIAN);
}
@ -247,6 +257,16 @@ Palette &Palette::saturatedAddColor(Palette& output, byte firstIndex, byte lastI
return output;
}
Palette &Palette::saturatedAddNormalizedGray(Palette& output, byte firstIndex, byte lastIndex, double normalizedGray) {
// Calculate the gray value rounded up away from zero
const double signedHalf = ((normalizedGray >= 0) ? +0.5 : -0.5);
const signed r = (signed)(_rMax * normalizedGray + signedHalf);
const signed g = (signed)(_gMax * normalizedGray + signedHalf);
const signed b = (signed)(_bMax * normalizedGray + signedHalf);
return saturatedAddColor(output, firstIndex, lastIndex, r, g, b);
}
// a.k.a. transformColor
// Parameter color components (i.e. r, g and b) are in range [-7, 7]
// e.g. r = 7 sets the resulting color's red component to maximum

3
engines/cine/pal.h
View File

@ -116,8 +116,11 @@ public:
Palette &rotateRight(byte firstIndex, byte lastIndex);
Palette &saturatedAddColor(Palette& output, byte firstIndex, byte lastIndex, signed r, signed g, signed b);
Palette &saturatedAddNormalizedGray(Palette& output, byte firstIndex, byte lastIndex, double normalizedGray);
uint colorCount() const;
Palette &fillWithBlack();
/*! \brief The original endian type in which this palette was loaded.
* \note This will always return either CINE_BIG_ENDIAN or CINE_LITTLE_ENDIAN (So no CINE_NATIVE_ENDIAN).
*/