thirdparty/scummvm
2
0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Renamed lowBits -> kLowBitsMask and highBits -> kHighBitsMask

Browse source 
svn-id: r36049
This commit is contained in:
Max Horn 2009-01-25 04:29:25 +00:00
parent 6297561f7c
commit dd586e0e20
3 changed files with 22 additions and 70 deletions
Download patch file Download diff file Expand all files Collapse all files

25
graphics/colormasks.h
View file

@ -56,7 +56,7 @@ The meaning of these is masks is the following:
appropriate data).
The highBits / lowBits / qhighBits / qlowBits are special values that are
The kHighBitsMask / kLowBitsMask / qhighBits / qlowBits are special values that are
used in the super-optimized interpolation functions in scaler/intern.h
and scaler/aspect.cpp. Currently they are only available in 555 and 565 mode.
To be specific: They pack the masks for two 16 bit pixels at once. The pixels
@ -70,8 +70,8 @@ The meaning of these is masks is the following:
template<>
struct ColorMasks<565> {
enum {
highBits = 0xF7DEF7DE,
lowBits = 0x08210821,
kHighBitsMask = 0xF7DEF7DE,
kLowBitsMask = 0x08210821,
qhighBits = 0xE79CE79C,
qlowBits = 0x18631863,
@ -88,21 +88,21 @@ struct ColorMasks<565> {
kGreenShift = kBlueBits,
kBlueShift = 0,
kAlphaMask = ((1 << kAlphaBits) - 1) << kAlphaShift,
kRedMask = ((1 << kRedBits) - 1) << kRedShift,
kGreenMask = ((1 << kGreenBits) - 1) << kGreenShift,
kBlueMask = ((1 << kBlueBits) - 1) << kBlueShift,
kRedBlueMask = kRedMask | kBlueMask
kAlphaMask = ((1 << kAlphaBits) - 1) << kAlphaShift,
kRedMask = ((1 << kRedBits) - 1) << kRedShift,
kGreenMask = ((1 << kGreenBits) - 1) << kGreenShift,
kBlueMask = ((1 << kBlueBits) - 1) << kBlueShift,
kRedBlueMask = kRedMask | kBlueMask,
kLowBits = (1 << kRedShift) | (1 << kGreenShift) | (1 << kBlueShift)
};
};
template<>
struct ColorMasks<555> {
enum {
highBits = 0x7BDE7BDE,
lowBits = 0x04210421,
kHighBitsMask = 0x7BDE7BDE,
kLowBitsMask = 0x04210421,
qhighBits = 0x739C739C,
qlowBits = 0x0C630C63,
@ -124,7 +124,8 @@ struct ColorMasks<555> {
kGreenMask = ((1 << kGreenBits) - 1) << kGreenShift,
kBlueMask = ((1 << kBlueBits) - 1) << kBlueShift,
kRedBlueMask = kRedMask | kBlueMask
kRedBlueMask = kRedMask | kBlueMask,
kLowBits = (1 << kRedShift) | (1 << kGreenShift) | (1 << kBlueShift)
};
};

12
graphics/scaler.cpp
View file

@ -121,21 +121,21 @@ void InitScalers(uint32 BitFormat) {
gBitFormat = BitFormat;
#ifndef DISABLE_HQ_SCALERS
#undef highBits;
#undef lowBits;
#undef kHighBitsMask;
#undef kLowBitsMask;
if (gBitFormat == 555) {
InitLUT(Graphics::createPixelFormat<555>());
#ifdef USE_NASM
hqx_highbits = Graphics::ColorMasks<555>::highBits;
hqx_lowbits = Graphics::ColorMasks<555>::lowBits & 0xFFFF;
hqx_highbits = Graphics::ColorMasks<555>::kHighBitsMask;
hqx_lowbits = Graphics::ColorMasks<555>::kLowBitsMask & 0xFFFF;
#endif
}
if (gBitFormat == 565) {
InitLUT(Graphics::createPixelFormat<565>());
#ifdef USE_NASM
hqx_highbits = Graphics::ColorMasks<565>::highBits;
hqx_lowbits = Graphics::ColorMasks<565>::lowBits & 0xFFFF;
hqx_highbits = Graphics::ColorMasks<565>::kHighBitsMask;
hqx_lowbits = Graphics::ColorMasks<565>::kLowBitsMask & 0xFFFF;
#endif
}
#endif

55
graphics/scaler/intern.h
View file

@ -30,8 +30,8 @@
#include "graphics/colormasks.h"
#define highBits Graphics::ColorMasks<bitFormat>::highBits
#define lowBits Graphics::ColorMasks<bitFormat>::lowBits
#define kHighBitsMask Graphics::ColorMasks<bitFormat>::kHighBitsMask
#define kLowBitsMask Graphics::ColorMasks<bitFormat>::kLowBitsMask
#define qhighBits Graphics::ColorMasks<bitFormat>::qhighBits
#define qlowBits Graphics::ColorMasks<bitFormat>::qlowBits
#define redblueMask Graphics::ColorMasks<bitFormat>::kRedBlueMask
@ -45,7 +45,7 @@
*/
template<int bitFormat>
static inline uint32 interpolate32_1_1(uint32 A, uint32 B) {
return (((A & highBits) >> 1) + ((B & highBits) >> 1) + (A & B & lowBits));
return (((A & kHighBitsMask) + (B & kHighBitsMask)) >> 1) + (A & B & kLowBitsMask);
}
/**
@ -99,55 +99,6 @@ static inline uint16 interpolate16_3(uint16 p1, uint16 p2, uint16 p3) {
}
template<int bitFormat>
static inline unsigned interpolate16_3_1(unsigned c1, unsigned c2) {
const unsigned lowbits=(((c1<<1)&(lowBits<<1))+(c1&qlowBits)+(c2&qlowBits))&qlowBits;
return ((c1*3+c2) - lowbits) >> 2;
}
template<int bitFormat>
static inline unsigned interpolate16_2_1_1(unsigned c1, unsigned c2, unsigned c3) {
c1<<=1;
const unsigned lowbits=((c1&(lowBits<<1))+(c2&qlowBits)+(c3&qlowBits))&qlowBits;
return ((c1+c2+c3) - lowbits) >> 2;
}
template<int bitFormat>
static inline unsigned interpolate16_1_1(unsigned c1, unsigned c2) {
return ( c1+c2 - ((c1^c2)&lowBits) ) >> 1;
}
template<int bitFormat>
static inline unsigned interpolate16_5_2_1(unsigned c1, unsigned c2, unsigned c3) {
c2<<=1;
const unsigned lowbits=( ((c1<<2)&(lowBits<<2))+(c1&0x1CE7)+(c2&0x18C6)+(c3&0x1CE7) ) & 0x1CE7;
return ((c1*5+c2+c3) - lowbits) >> 3;
}
template<int bitFormat>
static inline unsigned interpolate16_6_1_1(unsigned c1, unsigned c2, unsigned c3) {
const unsigned lowbits=(((((c1<<1)&(lowBits<<1))+(c1&qlowBits))<<1)+(c2&0x1CE7)+(c3&0x1CE7))&0x1CE7;
return ((c1*6+c2+c3) - lowbits) >> 3;
}
template<int bitFormat>
static inline unsigned interpolate16_2_3_3(unsigned c1, unsigned c2, unsigned c3) {
c1<<=1;
const unsigned rb=(c1&(redblueMask<<1))+((c2&redblueMask)+(c3&redblueMask))*3;
const unsigned g=(c1&(greenMask<<1))+((c2&greenMask)+(c3&greenMask))*3;
return ((rb&(redblueMask<<3))|(g&(greenMask<<8)))>>3;
}
template<int bitFormat>
static inline unsigned interpolate16_14_1_1(unsigned c1, unsigned c2, unsigned c3) {
const unsigned rb=(c1&redblueMask)*14+(c2&redblueMask)+(c3&redblueMask);
const unsigned g=(c1&greenMask)*14+(c2&greenMask)+(c3&greenMask);
return ((rb&(redblueMask<<4))|(g&(greenMask<<4)))>>4;
}
/**
* Compare two YUV values (encoded 8-8-8) and check if they differ by more than
* a certain hard coded threshold. Used by the hq scaler family.