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b1e8889d96
They are not particularly packaged in Linux distros so we do not facilitate unbundling via SCons. There could be done if/when there is interest. Also s/pnm/pbm/, long-lived typo :)
210 lines
5.0 KiB
C++
210 lines
5.0 KiB
C++
//============================================================================
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#include "PvrTcPacket.h"
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#include "BitScale.h"
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//============================================================================
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using namespace Javelin;
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//============================================================================
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const unsigned char PvrTcPacket::BILINEAR_FACTORS[16][4] =
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{
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{ 4, 4, 4, 4 },
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{ 2, 6, 2, 6 },
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{ 8, 0, 8, 0 },
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{ 6, 2, 6, 2 },
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{ 2, 2, 6, 6 },
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{ 1, 3, 3, 9 },
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{ 4, 0, 12, 0 },
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{ 3, 1, 9, 3 },
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{ 8, 8, 0, 0 },
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{ 4, 12, 0, 0 },
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{ 16, 0, 0, 0 },
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{ 12, 4, 0, 0 },
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{ 6, 6, 2, 2 },
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{ 3, 9, 1, 3 },
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{ 12, 0, 4, 0 },
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{ 9, 3, 3, 1 },
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};
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// Weights are { colorA, colorB, alphaA, alphaB }
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const unsigned char PvrTcPacket::WEIGHTS[8][4] =
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{
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// Weights for Mode=0
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{ 8, 0, 8, 0 },
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{ 5, 3, 5, 3 },
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{ 3, 5, 3, 5 },
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{ 0, 8, 0, 8 },
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// Weights for Mode=1
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{ 8, 0, 8, 0 },
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{ 4, 4, 4, 4 },
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{ 4, 4, 0, 0 },
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{ 0, 8, 0, 8 },
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};
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//============================================================================
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ColorRgb<int> PvrTcPacket::GetColorRgbA() const
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{
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if(colorAIsOpaque)
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{
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unsigned char r = colorA >> 9;
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unsigned char g = colorA >> 4 & 0x1f;
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unsigned char b = colorA & 0xf;
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return ColorRgb<int>(Data::BITSCALE_5_TO_8[r],
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Data::BITSCALE_5_TO_8[g],
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Data::BITSCALE_4_TO_8[b]);
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}
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else
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{
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unsigned char r = (colorA >> 7) & 0xf;
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unsigned char g = (colorA >> 3) & 0xf;
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unsigned char b = colorA & 7;
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return ColorRgb<int>(Data::BITSCALE_4_TO_8[r],
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Data::BITSCALE_4_TO_8[g],
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Data::BITSCALE_3_TO_8[b]);
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}
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}
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ColorRgb<int> PvrTcPacket::GetColorRgbB() const
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{
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if(colorBIsOpaque)
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{
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unsigned char r = colorB >> 10;
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unsigned char g = colorB >> 5 & 0x1f;
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unsigned char b = colorB & 0x1f;
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return ColorRgb<int>(Data::BITSCALE_5_TO_8[r],
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Data::BITSCALE_5_TO_8[g],
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Data::BITSCALE_5_TO_8[b]);
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}
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else
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{
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unsigned char r = colorB >> 8 & 0xf;
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unsigned char g = colorB >> 4 & 0xf;
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unsigned char b = colorB & 0xf;
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return ColorRgb<int>(Data::BITSCALE_4_TO_8[r],
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Data::BITSCALE_4_TO_8[g],
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Data::BITSCALE_4_TO_8[b]);
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}
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}
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ColorRgba<int> PvrTcPacket::GetColorRgbaA() const
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{
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if(colorAIsOpaque)
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{
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unsigned char r = colorA >> 9;
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unsigned char g = colorA >> 4 & 0x1f;
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unsigned char b = colorA & 0xf;
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return ColorRgba<int>(Data::BITSCALE_5_TO_8[r],
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Data::BITSCALE_5_TO_8[g],
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Data::BITSCALE_4_TO_8[b],
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255);
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}
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else
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{
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unsigned char a = colorA >> 11 & 7;
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unsigned char r = colorA >> 7 & 0xf;
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unsigned char g = colorA >> 3 & 0xf;
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unsigned char b = colorA & 7;
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return ColorRgba<int>(Data::BITSCALE_4_TO_8[r],
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Data::BITSCALE_4_TO_8[g],
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Data::BITSCALE_3_TO_8[b],
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Data::BITSCALE_3_TO_8[a]);
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}
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}
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ColorRgba<int> PvrTcPacket::GetColorRgbaB() const
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{
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if(colorBIsOpaque)
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{
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unsigned char r = colorB >> 10;
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unsigned char g = colorB >> 5 & 0x1f;
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unsigned char b = colorB & 0x1f;
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return ColorRgba<int>(Data::BITSCALE_5_TO_8[r],
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Data::BITSCALE_5_TO_8[g],
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Data::BITSCALE_5_TO_8[b],
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255);
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}
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else
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{
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unsigned char a = colorB >> 12 & 7;
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unsigned char r = colorB >> 8 & 0xf;
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unsigned char g = colorB >> 4 & 0xf;
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unsigned char b = colorB & 0xf;
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return ColorRgba<int>(Data::BITSCALE_4_TO_8[r],
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Data::BITSCALE_4_TO_8[g],
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Data::BITSCALE_4_TO_8[b],
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Data::BITSCALE_3_TO_8[a]);
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}
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}
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//============================================================================
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void PvrTcPacket::SetColorA(const ColorRgb<unsigned char>& c)
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{
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int r = Data::BITSCALE_8_TO_5_FLOOR[c.r];
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int g = Data::BITSCALE_8_TO_5_FLOOR[c.g];
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int b = Data::BITSCALE_8_TO_4_FLOOR[c.b];
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colorA = r<<9 | g<<4 | b;
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colorAIsOpaque = true;
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}
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void PvrTcPacket::SetColorB(const ColorRgb<unsigned char>& c)
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{
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int r = Data::BITSCALE_8_TO_5_CEIL[c.r];
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int g = Data::BITSCALE_8_TO_5_CEIL[c.g];
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int b = Data::BITSCALE_8_TO_5_CEIL[c.b];
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colorB = r<<10 | g<<5 | b;
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colorBIsOpaque = true;
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}
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void PvrTcPacket::SetColorA(const ColorRgba<unsigned char>& c)
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{
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int a = Data::BITSCALE_8_TO_3_FLOOR[c.a];
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if(a == 7)
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{
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int r = Data::BITSCALE_8_TO_5_FLOOR[c.r];
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int g = Data::BITSCALE_8_TO_5_FLOOR[c.g];
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int b = Data::BITSCALE_8_TO_4_FLOOR[c.b];
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colorA = r<<9 | g<<4 | b;
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colorAIsOpaque = true;
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}
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else
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{
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int r = Data::BITSCALE_8_TO_4_FLOOR[c.r];
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int g = Data::BITSCALE_8_TO_4_FLOOR[c.g];
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int b = Data::BITSCALE_8_TO_3_FLOOR[c.b];
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colorA = a<<11 | r<<7 | g<<3 | b;
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colorAIsOpaque = false;
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}
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}
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void PvrTcPacket::SetColorB(const ColorRgba<unsigned char>& c)
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{
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int a = Data::BITSCALE_8_TO_3_CEIL[c.a];
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if(a == 7)
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{
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int r = Data::BITSCALE_8_TO_5_CEIL[c.r];
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int g = Data::BITSCALE_8_TO_5_CEIL[c.g];
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int b = Data::BITSCALE_8_TO_5_CEIL[c.b];
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colorB = r<<10 | g<<5 | b;
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colorBIsOpaque = true;
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}
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else
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{
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int r = Data::BITSCALE_8_TO_4_CEIL[c.r];
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int g = Data::BITSCALE_8_TO_4_CEIL[c.g];
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int b = Data::BITSCALE_8_TO_4_CEIL[c.b];
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colorB = a<<12 | r<<8 | g<<4 | b;
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colorBIsOpaque = false;
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}
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}
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//============================================================================
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