887 lines
19 KiB
C++
887 lines
19 KiB
C++
// Copyright (C) 2002-2007 Nikolaus Gebhardt / Thomas Alten
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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/*
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History:
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- changed behaviour for log2 textures ( replaced multiplies by shift )
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*/
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#ifndef __S_VIDEO_2_SOFTWARE_HELPER_H_INCLUDED__
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#define __S_VIDEO_2_SOFTWARE_HELPER_H_INCLUDED__
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#include "SoftwareDriver2_compile_config.h"
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#include "irrMath.h"
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#include "CSoftwareTexture2.h"
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namespace irr
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{
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// supporting different packed pixel needs many defines...
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#ifdef SOFTWARE_DRIVER_2_32BIT
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typedef u32 tVideoSample;
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#define MASK_A 0xFF000000
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#define MASK_R 0x00FF0000
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#define MASK_G 0x0000FF00
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#define MASK_B 0x000000FF
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#define SHIFT_A 24
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#define SHIFT_R 16
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#define SHIFT_G 8
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#define SHIFT_B 0
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#define COLOR_MAX 0xFF
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#define COLOR_BRIGHT_WHITE 0xFFFFFFFF
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#define VIDEO_SAMPLE_GRANULARITY 2
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#else
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typedef u16 tVideoSample;
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#define MASK_A 0x8000
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#define MASK_R 0x7C00
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#define MASK_G 0x03E0
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#define MASK_B 0x001F
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#define SHIFT_A 15
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#define SHIFT_R 10
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#define SHIFT_G 5
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#define SHIFT_B 0
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#define COLOR_MAX 0x1F
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#define COLOR_BRIGHT_WHITE 0xFFFF
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#define VIDEO_SAMPLE_GRANULARITY 1
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#endif
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// ----------------------- Generic ----------------------------------
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//! a more useful memset for pixel
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inline void memset32 ( void * dest, const u32 value, u32 bytesize )
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{
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u32 * d = (u32*) dest;
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u32 i;
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i = bytesize >> ( 2 + 3 );
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while( i )
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{
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d[0] = value;
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d[1] = value;
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d[2] = value;
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d[3] = value;
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d[4] = value;
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d[5] = value;
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d[6] = value;
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d[7] = value;
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d += 8;
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i -= 1;
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}
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i = (bytesize >> 2 ) & 7;
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while( i )
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{
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d[0] = value;
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d += 1;
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i -= 1;
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}
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}
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/*
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use biased loop counter
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--> 0 byte copy is forbidden
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*/
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REALINLINE void memcpy32_small ( void * dest, const void *source, u32 bytesize )
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{
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u32 c = bytesize >> 2;
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do
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{
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((u32*) dest ) [ c + -1 ] = ((u32*) source) [ c + -1 ];
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} while ( --c );
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}
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// integer log2 of a float ieee 754. TODO: non ieee floating point
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static inline s32 s32_log2_f32( f32 f)
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{
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u32 x = IR ( f );
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return ((x & 0x7F800000) >> 23) - 127;
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}
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static inline s32 s32_log2_s32(u32 x)
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{
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return s32_log2_f32( (f32) x);
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}
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static inline s32 s32_abs(s32 x)
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{
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s32 b = x >> 31;
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return (x ^ b ) - b;
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}
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// TODO: don't stick on 32 Bit Pointer
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#define PointerAsValue(x) ( (u32) (u32*) (x) )
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//! conditional set based on mask and arithmetic shift
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REALINLINE u32 if_mask_a_else_b ( const u32 mask, const u32 a, const u32 b )
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{
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return ( mask & ( a ^ b ) ) ^ b;
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}
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inline void setbits ( u32 &state, s32 condition, u32 mask )
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{
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state ^= ( ( -condition >> 31 ) ^ state ) & mask;
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}
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// ------------------ Video---------------------------------------
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/*!
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Pixel = dest * ( 1 - alpha ) + source * alpha
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alpha [0;256]
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*/
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REALINLINE u32 PixelBlend32 ( const u32 c2, const u32 c1, u32 alpha )
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{
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u32 srcRB = c1 & 0x00FF00FF;
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u32 srcXG = c1 & 0x0000FF00;
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u32 dstRB = c2 & 0x00FF00FF;
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u32 dstXG = c2 & 0x0000FF00;
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u32 rb = srcRB - dstRB;
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u32 xg = srcXG - dstXG;
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rb *= alpha;
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xg *= alpha;
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rb >>= 8;
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xg >>= 8;
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rb += dstRB;
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xg += dstXG;
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rb &= 0x00FF00FF;
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xg &= 0x0000FF00;
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return rb | xg;
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}
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/*!
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Pixel = dest * ( 1 - alpha ) + source * alpha
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alpha [0;32]
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*/
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inline u16 PixelBlend16 ( const u16 c2, const u32 c1, const u32 alpha )
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{
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u32 srcRB = c1 & 0x7C1F;
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u32 srcXG = c1 & 0x03E0;
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u32 dstRB = c2 & 0x7C1F;
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u32 dstXG = c2 & 0x03E0;
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u32 rb = srcRB - dstRB;
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u32 xg = srcXG - dstXG;
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rb *= alpha;
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xg *= alpha;
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rb >>= 5;
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xg >>= 5;
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rb += dstRB;
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xg += dstXG;
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rb &= 0x7C1F;
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xg &= 0x03E0;
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return rb | xg;
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}
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/*!
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Scale Color by (1/value)
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value 0 - 256 ( alpha )
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*/
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inline u32 PixelLerp32 ( const u32 source, const u32 value )
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{
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u32 srcRB = source & 0x00FF00FF;
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u32 srcXG = (source & 0xFF00FF00) >> 8;
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srcRB *= value;
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srcXG *= value;
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srcRB >>= 8;
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//srcXG >>= 8;
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srcXG &= 0xFF00FF00;
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srcRB &= 0x00FF00FF;
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return srcRB | srcXG;
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}
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/*
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return alpha in [0;256] Granularity
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add highbit alpha ( alpha > 127 ? + 1 )
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*/
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inline u32 extractAlpha ( const u32 c )
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{
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return ( c >> 24 ) + ( c >> 31 );
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}
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/*
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Pixel = c0 * (c1/31). c0 Alpha retain
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*/
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inline u16 PixelMul16 ( const u16 c0, const u16 c1)
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{
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return ((( ( (c0 & 0x7C00) * (c1 & 0x7C00) ) & 0x3E000000 ) >> 15 ) |
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(( ( (c0 & 0x03E0) * (c1 & 0x03E0) ) & 0x000F8000 ) >> 10 ) |
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(( ( (c0 & 0x001F) * (c1 & 0x001F) ) & 0x000003E0 ) >> 5 ) |
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(c0 & 0x8000));
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}
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/*
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Pixel = c0 * (c1/31).
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*/
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inline u16 PixelMul16_2 ( u16 c0, u16 c1)
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{
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return ( ( (c0 & 0x7C00) * (c1 & 0x7C00) ) & 0x3E000000 ) >> 15 |
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( ( (c0 & 0x03E0) * (c1 & 0x03E0) ) & 0x000F8000 ) >> 10 |
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( ( (c0 & 0x001F) * (c1 & 0x001F) ) & 0x000003E0 ) >> 5 |
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( c0 & c1 & 0x8000);
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}
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/*
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Pixel = c0 * (c1/255). c0 Alpha Retain
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*/
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REALINLINE u32 PixelMul32 ( const u32 c0, const u32 c1)
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{
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return (c0 & 0xFF000000) |
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(( ( (c0 & 0x00FF0000) >> 12 ) * ( (c1 & 0x00FF0000) >> 12 ) ) & 0x00FF0000 ) |
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(( ( (c0 & 0x0000FF00) * (c1 & 0x0000FF00) ) >> 16 ) & 0x0000FF00 ) |
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(( ( (c0 & 0x000000FF) * (c1 & 0x000000FF) ) >> 8 ) & 0x000000FF);
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}
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/*
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Pixel = c0 * (c1/255).
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*/
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REALINLINE u32 PixelMul32_2 ( const u32 c0, const u32 c1)
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{
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return (( ( (c0 & 0xFF000000) >> 16 ) * ( (c1 & 0xFF000000) >> 16 ) ) & 0xFF000000 ) |
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(( ( (c0 & 0x00FF0000) >> 12 ) * ( (c1 & 0x00FF0000) >> 12 ) ) & 0x00FF0000 ) |
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(( ( (c0 & 0x0000FF00) * (c1 & 0x0000FF00) ) >> 16 ) & 0x0000FF00 ) |
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(( ( (c0 & 0x000000FF) * (c1 & 0x000000FF) ) >> 8 ) & 0x000000FF);
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}
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/*
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Pixel = clamp ( c0 + c1, 0, 255 )
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*/
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REALINLINE u32 PixelAdd32 ( const u32 c2, const u32 c1)
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{
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u32 sum = ( c2 & 0x00FFFFFF ) + ( c1 & 0x00FFFFFF );
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u32 low_bits = ( c2 ^ c1 ) & 0x00010101;
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s32 carries = ( sum - low_bits ) & 0x01010100;
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u32 modulo = sum - carries;
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u32 clamp = carries - ( carries >> 8 );
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return modulo | clamp;
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}
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// 1 - Bit Alpha Blending
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inline u16 PixelBlend16 ( const u16 c2, const u16 c1 )
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{
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u16 c = c1 & 0x8000;
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c >>= 15;
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c += 0x7fff;
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c &= c2;
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c |= c1;
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return c;
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}
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// 1 - Bit Alpha Blending 16Bit SIMD
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inline u32 PixelBlend16_simd ( const u32 c2, const u32 c1 )
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{
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u32 c = c1 & 0x80008000;
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c >>= 15;
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c += 0x7fff7fff;
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c &= c2;
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c |= c1;
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return c;
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}
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/*!
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Pixel = dest * ( 1 - SourceAlpha ) + source * SourceAlpha
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*/
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inline u32 PixelBlend32 ( const u32 c2, const u32 c1 )
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{
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// alpha test
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u32 alpha = c1 & 0xFF000000;
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if ( 0 == alpha )
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return c2;
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if ( 0xFF000000 == alpha )
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{
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return c1;
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}
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alpha >>= 24;
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// add highbit alpha, if ( alpha > 127 ) alpha += 1;
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alpha += ( alpha >> 7);
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u32 srcRB = c1 & 0x00FF00FF;
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u32 srcXG = c1 & 0x0000FF00;
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u32 dstRB = c2 & 0x00FF00FF;
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u32 dstXG = c2 & 0x0000FF00;
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u32 rb = srcRB - dstRB;
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u32 xg = srcXG - dstXG;
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rb *= alpha;
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xg *= alpha;
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rb >>= 8;
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xg >>= 8;
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rb += dstRB;
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xg += dstXG;
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rb &= 0x00FF00FF;
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xg &= 0x0000FF00;
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return rb | xg;
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}
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// ------------------ Fix Point ----------------------------------
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typedef s32 tFixPoint;
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typedef u32 tFixPointu;
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// Fix Point 9
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#if 1
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#define FIX_POINT_PRE 9
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#define FIX_POINT_FRACT_MASK 0x1FF
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#define FIX_POINT_SIGNED_MASK 0xFFFFFE00
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#define FIX_POINT_UNSIGNED_MASK 0x7FFFFE00
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#define FIX_POINT_ONE 0x200
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#define FIX_POINT_ZERO_DOT_FIVE 0x100
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#define FIX_POINT_F32_MUL 512.f
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#endif
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// Fix Point 7
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#if 0
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#define FIX_POINT_PRE 7
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#define FIX_POINT_FRACT_MASK 0x7F
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#define FIX_POINT_SIGNED_MASK 0xFFFFFF80
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#define FIX_POINT_UNSIGNED_MASK 0x7FFFFF80
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#define FIX_POINT_ONE 0x80
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#define FIX_POINT_ZERO_DOT_FIVE 0x40
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#define FIX_POINT_F32_MUL 128.f
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#endif
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#define FIXPOINT_COLOR_MAX ( COLOR_MAX << FIX_POINT_PRE )
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/*
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convert signed integer to fixpoint
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*/
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inline tFixPoint s32_to_fixPoint (const s32 x)
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{
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return x << FIX_POINT_PRE;
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}
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inline tFixPointu u32_to_fixPoint (const u32 x)
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{
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return x << FIX_POINT_PRE;
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}
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inline u32 fixPointu_to_u32 (const tFixPointu x)
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{
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return x >> FIX_POINT_PRE;
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}
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// 1/x * FIX_POINT
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REALINLINE f32 fix_inverse32 ( const f32 x )
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{
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return FIX_POINT_F32_MUL / x;
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}
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/*
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convert float to fixpoint
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fast convert (fistp on x86) HAS to be used..
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hints: compileflag /QIfist for msvc7. msvc 8.0 has smth different
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others should use their favourite assembler..
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*/
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static inline int f_round2(f32 f)
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{
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f += (3<<22);
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return *((int*)&f) - 0x4b400000;
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}
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/*
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convert f32 to Fix Point.
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multiply is needed anyway, so scale mulby
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*/
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REALINLINE tFixPoint f32_to_fixPoint (const f32 x, const f32 mulby = FIX_POINT_F32_MUL )
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{
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return (tFixPoint) (x * mulby);
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}
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/*
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Fix Point , Fix Point Multiply
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*/
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REALINLINE tFixPointu imulFixu(const tFixPointu x, const tFixPointu y)
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{
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return (x * y) >> (tFixPointu) FIX_POINT_PRE;
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}
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/*
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Fix Point , Fix Point Multiply
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*/
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REALINLINE tFixPoint imulFix(const tFixPoint x, const tFixPoint y)
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{
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return ( x * y) >> ( FIX_POINT_PRE );
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}
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/*
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Multiply x * y * 1
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*/
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REALINLINE tFixPoint imulFix_tex1(const tFixPoint x, const tFixPoint y)
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{
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return ( ( (tFixPointu) x >> 2 ) * ( (tFixPointu) y >> 2 ) ) >> (tFixPointu) ( FIX_POINT_PRE + 1 );
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}
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/*
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Multiply x * y * 2
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*/
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REALINLINE tFixPoint imulFix_tex2(const tFixPoint x, const tFixPoint y)
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{
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return ( ( (tFixPointu) x >> 2 ) * ( (tFixPointu) y >> 2 ) ) >> (tFixPointu) ( FIX_POINT_PRE + 3 );
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}
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/*
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Multiply x * y * 4
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*/
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REALINLINE tFixPoint imulFix_tex4(const tFixPoint x, const tFixPoint y)
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{
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#ifdef SOFTWARE_DRIVER_2_32BIT
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return ( ( (tFixPointu) x >> 2 ) * ( (tFixPointu) y >> 2 ) ) >> (tFixPointu) ( FIX_POINT_PRE + 2 );
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#else
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return ( x * y) >> ( FIX_POINT_PRE + ( VIDEO_SAMPLE_GRANULARITY * 3 ) );
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#endif
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}
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/*!
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clamp FixPoint to maxcolor in FixPoint, min(a,31)
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*/
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REALINLINE tFixPoint clampfix_maxcolor ( const tFixPoint a)
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{
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tFixPoint c = (a - FIXPOINT_COLOR_MAX) >> 31;
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return (a & c) | ( FIXPOINT_COLOR_MAX & ~c);
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}
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/*!
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clamp FixPoint to 0 in FixPoint, max(a,0)
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*/
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inline tFixPoint clampfix_mincolor ( const tFixPoint a)
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{
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return a - ( a & ( a >> 31 ) );
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}
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// rount fixpoint to int
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inline s32 roundFix ( const tFixPoint x )
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{
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return ( x + FIX_POINT_ZERO_DOT_FIVE ) >> FIX_POINT_PRE;
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}
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// x in [0;1[
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inline s32 f32_to_23Bits(const f32 x)
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{
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f32 y = x + 1.f;
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return ((u32&)y) & 0x7FFFFF; // last 23 bits
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}
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/*!
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return VideoSample from fixpoint
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*/
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REALINLINE tVideoSample fix_to_color ( const tFixPoint r, const tFixPoint g, const tFixPoint b )
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{
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#ifdef __BIG_ENDIAN__
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return ( r & FIXPOINT_COLOR_MAX) >> ( FIX_POINT_PRE - 8) |
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( g & FIXPOINT_COLOR_MAX) << ( 16 - FIX_POINT_PRE ) |
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//( g & FIXPOINT_COLOR_MAX) << ( SHIFT_G - FIX_POINT_PRE ) |
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( b & FIXPOINT_COLOR_MAX) << ( 24 - FIX_POINT_PRE );
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#else
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return ( r & FIXPOINT_COLOR_MAX) << ( SHIFT_R - FIX_POINT_PRE ) |
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( g & FIXPOINT_COLOR_MAX) >> ( FIX_POINT_PRE - SHIFT_G ) |
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//( g & FIXPOINT_COLOR_MAX) << ( SHIFT_G - FIX_POINT_PRE ) |
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( b & FIXPOINT_COLOR_MAX) >> ( FIX_POINT_PRE - SHIFT_B );
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#endif
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}
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/*!
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return fixpoint from VideoSample
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*/
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inline void color_to_fix ( tFixPoint &r, tFixPoint &g, tFixPoint &b, const tVideoSample t00 )
|
|
{
|
|
r = (t00 & MASK_R) >> ( SHIFT_R - FIX_POINT_PRE );
|
|
//g = (t00 & MASK_G) >> ( SHIFT_G - FIX_POINT_PRE );
|
|
g = (t00 & MASK_G) << ( FIX_POINT_PRE - SHIFT_G );
|
|
b = (t00 & MASK_B) << ( FIX_POINT_PRE - SHIFT_B );
|
|
}
|
|
|
|
|
|
// ----- FP24 ---- floating point z-buffer
|
|
|
|
#if 1
|
|
typedef f32 fp24;
|
|
#else
|
|
struct fp24
|
|
{
|
|
u32 v;
|
|
|
|
fp24() {}
|
|
|
|
fp24 ( const f32 f )
|
|
{
|
|
f32 y = f + 1.f;
|
|
v = ((u32&)y) & 0x7FFFFF; // last 23 bits
|
|
}
|
|
|
|
void operator=(const f32 f )
|
|
{
|
|
f32 y = f + 1.f;
|
|
v = ((u32&)y) & 0x7FFFFF; // last 23 bits
|
|
}
|
|
|
|
void operator+=(const fp24 &other )
|
|
{
|
|
v += other.v;
|
|
}
|
|
|
|
operator f32 () const
|
|
{
|
|
f32 r = FR ( v );
|
|
return r + 1.f;
|
|
}
|
|
|
|
};
|
|
#endif
|
|
|
|
|
|
// ------------------------ Internal Texture -----------------------------
|
|
|
|
struct sInternalTexture
|
|
{
|
|
u32 textureXMask;
|
|
u32 textureYMask;
|
|
|
|
u32 pitchlog2;
|
|
void *data;
|
|
|
|
video::CSoftwareTexture2 *Texture;
|
|
s32 lodLevel;
|
|
};
|
|
|
|
|
|
|
|
// get video sample plain
|
|
inline tVideoSample getTexel_plain ( const sInternalTexture * t, const tFixPointu tx, const tFixPointu ty )
|
|
{
|
|
u32 ofs;
|
|
|
|
ofs = ( ( ty & t->textureYMask ) >> FIX_POINT_PRE ) << t->pitchlog2;
|
|
ofs |= ( tx & t->textureXMask ) >> ( FIX_POINT_PRE - VIDEO_SAMPLE_GRANULARITY );
|
|
|
|
// texel
|
|
return *((tVideoSample*)( (u8*) t->data + ofs ));
|
|
}
|
|
|
|
// get video sample to fix
|
|
inline void getTexel_fix ( tFixPoint &r, tFixPoint &g, tFixPoint &b,
|
|
const sInternalTexture * t, const tFixPointu tx, const tFixPointu ty
|
|
)
|
|
{
|
|
u32 ofs;
|
|
|
|
ofs = ( ( ty & t->textureYMask ) >> FIX_POINT_PRE ) << t->pitchlog2;
|
|
ofs |= ( tx & t->textureXMask ) >> ( FIX_POINT_PRE - VIDEO_SAMPLE_GRANULARITY );
|
|
|
|
// texel
|
|
tVideoSample t00;
|
|
t00 = *((tVideoSample*)( (u8*) t->data + ofs ));
|
|
|
|
r = (t00 & MASK_R) >> ( SHIFT_R - FIX_POINT_PRE);
|
|
g = (t00 & MASK_G) << ( FIX_POINT_PRE - SHIFT_G );
|
|
b = (t00 & MASK_B) << ( FIX_POINT_PRE - SHIFT_B );
|
|
|
|
}
|
|
|
|
|
|
inline void getSample_texture_dither ( tFixPoint &r, tFixPoint &g, tFixPoint &b,
|
|
const sInternalTexture * t, const tFixPointu tx, const tFixPointu ty,
|
|
const u32 x, const u32 y
|
|
)
|
|
{
|
|
static const tFixPointu dithermask[] =
|
|
{
|
|
0x00,0x80,0x20,0xa0,
|
|
0xc0,0x40,0xe0,0x60,
|
|
0x30,0xb0,0x10,0x90,
|
|
0xf0,0x70,0xd0,0x50
|
|
};
|
|
|
|
const u32 index = (y & 3 ) << 2 | (x & 3);
|
|
|
|
const tFixPointu _ntx = (tx + dithermask [ index ] ) & t->textureXMask;
|
|
const tFixPointu _nty = (ty + dithermask [ index ] ) & t->textureYMask;
|
|
|
|
u32 ofs;
|
|
ofs = ( ( _nty ) >> FIX_POINT_PRE ) << t->pitchlog2;
|
|
ofs |= ( _ntx ) >> ( FIX_POINT_PRE - VIDEO_SAMPLE_GRANULARITY );
|
|
|
|
// texel
|
|
const tVideoSample t00 = *((tVideoSample*)( (u8*) t->data + ofs ));
|
|
|
|
(tFixPointu &) r = (t00 & MASK_R) >> ( SHIFT_R - FIX_POINT_PRE);
|
|
(tFixPointu &) g = (t00 & MASK_G) << ( FIX_POINT_PRE - SHIFT_G );
|
|
(tFixPointu &) b = (t00 & MASK_B) << ( FIX_POINT_PRE - SHIFT_B );
|
|
|
|
}
|
|
|
|
/*
|
|
load a sample from internal texture at position tx,ty to fixpoint
|
|
*/
|
|
#ifndef SOFTWARE_DRIVER_2_BILINEAR
|
|
|
|
// get Sample linear == getSample_fixpoint
|
|
|
|
inline void getSample_texture ( tFixPoint &r, tFixPoint &g, tFixPoint &b,
|
|
const sInternalTexture * t, const tFixPointu tx, const tFixPointu ty
|
|
)
|
|
{
|
|
u32 ofs;
|
|
|
|
ofs = ( ( ty & t->textureYMask ) >> FIX_POINT_PRE ) << t->pitchlog2;
|
|
ofs |= ( tx & t->textureXMask ) >> ( FIX_POINT_PRE - VIDEO_SAMPLE_GRANULARITY );
|
|
|
|
// texel
|
|
const tVideoSample t00 = *((tVideoSample*)( (u8*) t->data + ofs ));
|
|
|
|
(tFixPointu &) r = (t00 & MASK_R) >> ( SHIFT_R - FIX_POINT_PRE);
|
|
(tFixPointu &) g = (t00 & MASK_G) << ( FIX_POINT_PRE - SHIFT_G );
|
|
(tFixPointu &) b = (t00 & MASK_B) << ( FIX_POINT_PRE - SHIFT_B );
|
|
|
|
}
|
|
|
|
|
|
#else
|
|
|
|
// get sample linear
|
|
REALINLINE void getSample_linear ( tFixPointu &r, tFixPointu &g, tFixPointu &b,
|
|
const sInternalTexture * t, const tFixPointu tx, const tFixPointu ty
|
|
)
|
|
{
|
|
u32 ofs;
|
|
|
|
ofs = ( ( ty & t->textureYMask ) >> FIX_POINT_PRE ) << t->pitchlog2;
|
|
ofs |= ( tx & t->textureXMask ) >> ( FIX_POINT_PRE - VIDEO_SAMPLE_GRANULARITY );
|
|
|
|
// texel
|
|
tVideoSample t00;
|
|
t00 = *((tVideoSample*)( (u8*) t->data + ofs ));
|
|
|
|
r = (t00 & MASK_R) >> SHIFT_R;
|
|
g = (t00 & MASK_G) >> SHIFT_G;
|
|
b = (t00 & MASK_B);
|
|
}
|
|
|
|
// get Sample bilinear
|
|
REALINLINE void getSample_texture ( tFixPoint &r, tFixPoint &g, tFixPoint &b,
|
|
const sInternalTexture * t, const tFixPointu tx, const tFixPointu ty
|
|
)
|
|
{
|
|
|
|
tFixPointu r00,g00,b00;
|
|
tFixPointu r01,g01,b01;
|
|
tFixPointu r10,g10,b10;
|
|
tFixPointu r11,g11,b11;
|
|
|
|
getSample_linear ( r00, g00, b00, t, tx,ty );
|
|
getSample_linear ( r10, g10, b10, t, tx + FIX_POINT_ONE,ty );
|
|
getSample_linear ( r01, g01, b01, t, tx,ty + FIX_POINT_ONE );
|
|
getSample_linear ( r11, g11, b11, t, tx + FIX_POINT_ONE,ty + FIX_POINT_ONE );
|
|
|
|
const tFixPointu txFract = tx & FIX_POINT_FRACT_MASK;
|
|
const tFixPointu txFractInv = FIX_POINT_ONE - txFract;
|
|
|
|
const tFixPointu tyFract = ty & FIX_POINT_FRACT_MASK;
|
|
const tFixPointu tyFractInv = FIX_POINT_ONE - tyFract;
|
|
|
|
const tFixPointu w00 = imulFixu ( txFractInv, tyFractInv );
|
|
const tFixPointu w10 = imulFixu ( txFract , tyFractInv );
|
|
const tFixPointu w01 = imulFixu ( txFractInv, tyFract );
|
|
const tFixPointu w11 = imulFixu ( txFract , tyFract );
|
|
|
|
r = (r00 * w00 ) +
|
|
(r01 * w01 ) +
|
|
(r10 * w10 ) +
|
|
(r11 * w11 );
|
|
|
|
g = (g00 * w00 ) +
|
|
(g01 * w01 ) +
|
|
(g10 * w10 ) +
|
|
(g11 * w11 );
|
|
|
|
b = (b00 * w00 ) +
|
|
(b01 * w01 ) +
|
|
(b10 * w10 ) +
|
|
(b11 * w11 );
|
|
|
|
}
|
|
|
|
|
|
// get sample linear
|
|
REALINLINE void getSample_linear ( tFixPointu &a, tFixPointu &r, tFixPointu &g, tFixPointu &b,
|
|
const sInternalTexture * t, const tFixPointu tx, const tFixPointu ty
|
|
)
|
|
{
|
|
u32 ofs;
|
|
|
|
ofs = ( ( ty & t->textureYMask ) >> FIX_POINT_PRE ) << t->pitchlog2;
|
|
ofs |= ( tx & t->textureXMask ) >> ( FIX_POINT_PRE - VIDEO_SAMPLE_GRANULARITY );
|
|
|
|
// texel
|
|
tVideoSample t00;
|
|
t00 = *((tVideoSample*)( (u8*) t->data + ofs ));
|
|
|
|
a = (t00 & MASK_A) >> SHIFT_A;
|
|
r = (t00 & MASK_R) >> SHIFT_R;
|
|
g = (t00 & MASK_G) >> SHIFT_G;
|
|
b = (t00 & MASK_B);
|
|
}
|
|
|
|
// get Sample bilinear
|
|
REALINLINE void getSample_texture ( tFixPointu &a, tFixPointu &r, tFixPointu &g, tFixPointu &b,
|
|
const sInternalTexture * t, const tFixPointu tx, const tFixPointu ty
|
|
)
|
|
{
|
|
|
|
tFixPointu a00, r00,g00,b00;
|
|
tFixPointu a01, r01,g01,b01;
|
|
tFixPointu a10, r10,g10,b10;
|
|
tFixPointu a11, r11,g11,b11;
|
|
|
|
getSample_linear ( a00, r00, g00, b00, t, tx,ty );
|
|
getSample_linear ( a10, r10, g10, b10, t, tx + FIX_POINT_ONE,ty );
|
|
getSample_linear ( a01, r01, g01, b01, t, tx,ty + FIX_POINT_ONE );
|
|
getSample_linear ( a11, r11, g11, b11, t, tx + FIX_POINT_ONE,ty + FIX_POINT_ONE );
|
|
|
|
const tFixPointu txFract = tx & FIX_POINT_FRACT_MASK;
|
|
const tFixPointu txFractInv = FIX_POINT_ONE - txFract;
|
|
|
|
const tFixPointu tyFract = ty & FIX_POINT_FRACT_MASK;
|
|
const tFixPointu tyFractInv = FIX_POINT_ONE - tyFract;
|
|
|
|
const tFixPointu w00 = imulFixu ( txFractInv, tyFractInv );
|
|
const tFixPointu w10 = imulFixu ( txFract , tyFractInv );
|
|
const tFixPointu w01 = imulFixu ( txFractInv, tyFract );
|
|
const tFixPointu w11 = imulFixu ( txFract , tyFract );
|
|
|
|
a = (a00 * w00 ) +
|
|
(a01 * w01 ) +
|
|
(a10 * w10 ) +
|
|
(a11 * w11 );
|
|
|
|
r = (r00 * w00 ) +
|
|
(r01 * w01 ) +
|
|
(r10 * w10 ) +
|
|
(r11 * w11 );
|
|
|
|
g = (g00 * w00 ) +
|
|
(g01 * w01 ) +
|
|
(g10 * w10 ) +
|
|
(g11 * w11 );
|
|
|
|
b = (b00 * w00 ) +
|
|
(b01 * w01 ) +
|
|
(b10 * w10 ) +
|
|
(b11 * w11 );
|
|
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
// some 2D Defines
|
|
struct AbsRectangle
|
|
{
|
|
s32 x0;
|
|
s32 y0;
|
|
s32 x1;
|
|
s32 y1;
|
|
};
|
|
|
|
inline void intersect ( AbsRectangle &dest, const AbsRectangle& a, const AbsRectangle& b)
|
|
{
|
|
dest.x0 = core::s32_max( a.x0, b.x0 );
|
|
dest.y0 = core::s32_max( a.y0, b.y0 );
|
|
dest.x1 = core::s32_min( a.x1, b.x1 );
|
|
dest.y1 = core::s32_min( a.y1, b.y1 );
|
|
}
|
|
|
|
inline bool isValid (const AbsRectangle& a)
|
|
{
|
|
return a.x0 < a.x1 && a.y0 < a.y1;
|
|
}
|
|
|
|
// some 1D defines
|
|
struct sIntervall
|
|
{
|
|
s32 start;
|
|
s32 end;
|
|
};
|
|
|
|
// returning intersection width
|
|
inline s32 intervall_intersect_test( const sIntervall& a, const sIntervall& b)
|
|
{
|
|
return core::s32_min( a.end, b.end ) - core::s32_max( a.start, b.start );
|
|
}
|
|
|
|
|
|
} // namespace
|
|
|
|
#endif
|
|
|