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679 lines
23 KiB
679 lines
23 KiB
//===== Copyright 1996-2005, Valve Corporation, All rights reserved. ======//
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//
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// Purpose:
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//
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//===========================================================================//
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#ifndef IMAGEFORMAT_H
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#define IMAGEFORMAT_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include <stdio.h>
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#include "tier0/platform.h"
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#include "tier0/dbg.h"
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#include "bitmap/imageformat_declarations.h"
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//-----------------------------------------------------------------------------
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// Color structures
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//-----------------------------------------------------------------------------
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#pragma warning ( disable : 4293 )
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template< int nBitCount > FORCEINLINE int ConvertTo10Bit( int x )
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{
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switch ( nBitCount )
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{
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case 1:
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return ( x & 0x1 ) ? 0x3FF : 0;
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case 2:
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return ( x << 8 ) | ( x << 6 ) | ( x << 4 ) | ( x << 2 ) | x;
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case 3:
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return ( x << 7 ) | ( x << 4 ) | ( x << 1 ) | ( x >> 2 );
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case 4:
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return ( x << 6 ) | ( x << 2 ) | ( x >> 2 );
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default:
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#if defined(POSIX) || defined(_PS3)
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return ( x << ( 10 - nBitCount ) ) | ( x >> MAX( 0, MIN( 32, ( nBitCount - ( 10 - nBitCount ) ) ) ) );
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#else // !_PS3
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return ( x << ( 10 - nBitCount ) ) | ( x >> ( nBitCount - ( 10 - nBitCount ) ) );
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#endif
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}
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}
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#pragma warning ( default : 4293 )
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template< int nBitCount > FORCEINLINE int ConvertFrom10Bit( int x )
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{
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return ( x >> ( 10 - nBitCount ) );
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}
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struct R32F_t
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{
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float32 r;
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};
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struct RG3232F_t
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{
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float32 r;
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float32 g;
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};
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struct RGB323232F_t
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{
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float32 r;
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float32 g;
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float32 b;
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};
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struct RGBA32323232F_t
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{
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float32 r;
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float32 g;
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float32 b;
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float32 a;
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};
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struct RGBA1010102_t
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{
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uint32 r : 10;
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uint32 g : 10;
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uint32 b : 10;
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uint32 a : 2;
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inline int RTo10Bit( ) const { return ConvertTo10Bit<10>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<10>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<10>( b ); }
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inline int ATo10Bit( ) const { return ConvertTo10Bit<2>( a ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<10>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<10>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<10>( b10 ); }
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inline void AFrom10Bit( int a10 ) { a = ConvertFrom10Bit<10>( a10 ); }
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};
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struct BGRA1010102_t
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{
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uint32 b : 10;
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uint32 g : 10;
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uint32 r : 10;
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uint32 a : 2;
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inline int RTo10Bit( ) const { return ConvertTo10Bit<10>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<10>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<10>( b ); }
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inline int ATo10Bit( ) const { return ConvertTo10Bit<2>( a ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<10>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<10>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<10>( b10 ); }
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inline void AFrom10Bit( int a10 ) { a = ConvertFrom10Bit<10>( a10 ); }
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};
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struct BGRA8888_t
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{
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uint8 b; // change the order of names to change the
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uint8 g; // order of the output ARGB or BGRA, etc...
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uint8 r; // Last one is MSB, 1st is LSB.
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uint8 a;
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inline BGRA8888_t& operator=( const BGRA8888_t& in )
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{
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*( unsigned int * )this = *( unsigned int * )∈
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return *this;
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}
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inline int RTo10Bit( ) const { return ConvertTo10Bit<8>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<8>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<8>( b ); }
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inline int ATo10Bit( ) const { return ConvertTo10Bit<8>( a ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<8>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<8>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<8>( b10 ); }
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inline void AFrom10Bit( int a10 ) { a = ConvertFrom10Bit<8>( a10 ); }
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};
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struct ABGR8888_t
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{
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uint8 a;
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uint8 b; // change the order of names to change the
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uint8 g; // order of the output ARGB or BGRA, etc...
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uint8 r; // Last one is MSB, 1st is LSB.
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inline ABGR8888_t& operator=( const BGRA8888_t& in )
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{
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r = in.r;
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g = in.g;
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b = in.b;
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a = in.a;
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return *this;
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}
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inline int RTo10Bit( ) const { return ConvertTo10Bit<8>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<8>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<8>( b ); }
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inline int ATo10Bit( ) const { return ConvertTo10Bit<8>( a ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<8>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<8>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<8>( b10 ); }
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inline void AFrom10Bit( int a10 ) { a = ConvertFrom10Bit<8>( a10 ); }
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};
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struct RGBA8888_t
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{
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uint8 r; // change the order of names to change the
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uint8 g; // order of the output ARGB or BGRA, etc...
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uint8 b; // Last one is MSB, 1st is LSB.
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uint8 a;
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inline RGBA8888_t& operator=( const BGRA8888_t& in )
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{
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r = in.r;
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g = in.g;
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b = in.b;
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a = in.a;
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return *this;
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}
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inline int RTo10Bit( ) const { return ConvertTo10Bit<8>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<8>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<8>( b ); }
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inline int ATo10Bit( ) const { return ConvertTo10Bit<8>( a ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<8>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<8>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<8>( b10 ); }
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inline void AFrom10Bit( int a10 ) { a = ConvertFrom10Bit<8>( a10 ); }
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};
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struct RGB888_t
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{
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uint8 r;
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uint8 g;
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uint8 b;
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inline RGB888_t& operator=( const BGRA8888_t& in )
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{
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r = in.r;
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g = in.g;
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b = in.b;
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return *this;
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}
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inline bool operator==( const RGB888_t& in ) const
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{
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return ( r == in.r ) && ( g == in.g ) && ( b == in.b );
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}
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inline bool operator!=( const RGB888_t& in ) const
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{
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return ( r != in.r ) || ( g != in.g ) || ( b != in.b );
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}
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inline int RTo10Bit( ) const { return ConvertTo10Bit<8>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<8>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<8>( b ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<8>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<8>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<8>( b10 ); }
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};
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struct BGR888_t
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{
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uint8 b;
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uint8 g;
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uint8 r;
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inline BGR888_t& operator=( const BGRA8888_t& in )
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{
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r = in.r;
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g = in.g;
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b = in.b;
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return *this;
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}
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inline int RTo10Bit( ) const { return ConvertTo10Bit<8>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<8>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<8>( b ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<8>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<8>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<8>( b10 ); }
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};
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struct BGRX8888_t
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{
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uint8 b;
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uint8 g;
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uint8 r;
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uint8 x;
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inline BGRX8888_t& operator=( const BGRA8888_t& in )
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{
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r = in.r;
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g = in.g;
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b = in.b;
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x = 255;
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return *this;
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}
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inline int RTo10Bit( ) const { return ConvertTo10Bit<8>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<8>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<8>( b ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<8>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<8>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<8>( b10 ); }
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};
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// 360 uses this structure for x86 dxt decoding
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#if defined( _X360 )
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#pragma bitfield_order( push, lsb_to_msb )
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#elif defined( _PS3 )
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#pragma ms_struct on
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#pragma reverse_bitfields on
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#endif
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struct BGR565_t
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{
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uint16 b : 5; // order of names changes
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uint16 g : 6; // byte order of output to 32 bit
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uint16 r : 5;
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inline BGR565_t& operator=( const BGRA8888_t& in )
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{
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r = in.r >> 3;
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g = in.g >> 2;
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b = in.b >> 3;
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return *this;
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}
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inline BGR565_t &Set( int red, int green, int blue )
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{
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r = red >> 3;
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g = green >> 2;
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b = blue >> 3;
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return *this;
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}
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inline int RTo10Bit( ) const { return ConvertTo10Bit<5>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<6>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<5>( b ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<5>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<6>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<5>( b10 ); }
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};
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#if defined( _X360 )
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#pragma bitfield_order( pop )
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#elif defined( _PS3 )
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#pragma ms_struct off
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#pragma reverse_bitfields off
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#endif
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struct BGRA5551_t
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{
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uint16 b : 5; // order of names changes
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uint16 g : 5; // byte order of output to 32 bit
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uint16 r : 5;
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uint16 a : 1;
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inline BGRA5551_t& operator=( const BGRA8888_t& in )
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{
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r = in.r >> 3;
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g = in.g >> 3;
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b = in.b >> 3;
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a = in.a >> 7;
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return *this;
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}
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inline int RTo10Bit( ) const { return ConvertTo10Bit<5>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<5>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<5>( b ); }
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inline int ATo10Bit( ) const { return ConvertTo10Bit<1>( a ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<5>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<5>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<5>( b10 ); }
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inline void AFrom10Bit( int a10 ) { a = ConvertFrom10Bit<1>( a10 ); }
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};
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struct BGRA4444_t
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{
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uint16 b : 4; // order of names changes
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uint16 g : 4; // byte order of output to 32 bit
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uint16 r : 4;
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uint16 a : 4;
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inline BGRA4444_t& operator=( const BGRA8888_t& in )
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{
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r = in.r >> 4;
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g = in.g >> 4;
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b = in.b >> 4;
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a = in.a >> 4;
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return *this;
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}
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inline int RTo10Bit( ) const { return ConvertTo10Bit<4>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<4>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<4>( b ); }
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inline int ATo10Bit( ) const { return ConvertTo10Bit<4>( a ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<4>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<4>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<4>( b10 ); }
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inline void AFrom10Bit( int a10 ) { a = ConvertFrom10Bit<4>( a10 ); }
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};
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struct RGBX5551_t
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{
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uint16 r : 5;
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uint16 g : 5;
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uint16 b : 5;
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uint16 x : 1;
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inline RGBX5551_t& operator=( const BGRA8888_t& in )
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{
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r = in.r >> 3;
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g = in.g >> 3;
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b = in.b >> 3;
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return *this;
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}
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inline int RTo10Bit( ) const { return ConvertTo10Bit<5>( r ); }
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inline int GTo10Bit( ) const { return ConvertTo10Bit<5>( g ); }
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inline int BTo10Bit( ) const { return ConvertTo10Bit<5>( b ); }
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inline void RFrom10Bit( int r10 ) { r = ConvertFrom10Bit<5>( r10 ); }
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inline void GFrom10Bit( int g10 ) { g = ConvertFrom10Bit<5>( g10 ); }
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inline void BFrom10Bit( int b10 ) { b = ConvertFrom10Bit<5>( b10 ); }
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};
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struct UV88_t
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{
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int8 u;
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int8 v;
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};
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struct UVWQ8888_t
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{
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int8 u;
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int8 v;
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int8 w;
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int8 q;
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};
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struct UVLX8888_t
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{
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int8 u;
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int8 v;
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uint8 l;
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uint8 x;
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};
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//-----------------------------------------------------------------------------
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// some important constants
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//-----------------------------------------------------------------------------
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#define ARTWORK_GAMMA ( 2.2f )
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#define IMAGE_MAX_DIM ( 2048 )
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//-----------------------------------------------------------------------------
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// information about each image format
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//-----------------------------------------------------------------------------
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struct ImageFormatInfo_t
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{
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const char* m_pName;
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uint8 m_nNumBytes;
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uint8 m_nNumRedBits;
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uint8 m_nNumGreenBits;
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uint8 m_nNumBlueBits;
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uint8 m_nNumAlphaBits;
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uint8 m_nNumDepthBits;
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uint8 m_nNumStencilBits;
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bool m_bIsCompressed:1;
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bool m_bIsFloat:1;
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bool m_bIsDepthFormat : 1;
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};
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//-----------------------------------------------------------------------------
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// Computes nice filters for a compression ratio
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//-----------------------------------------------------------------------------
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struct KernelInfo_t
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{
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float *m_pKernel;
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float *m_pInvKernel;
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int m_nWidth;
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int m_nHeight;
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int m_nDepth;
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int m_nDiameter;
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};
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//-----------------------------------------------------------------------------
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// Indicates the target console type that a given operation is for.
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// (e.g. you may be running on the PC but you're generating textures
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// for X360 or PS3, so IsPC, IsX360, etc. do not work)
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//-----------------------------------------------------------------------------
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enum VtfConsoleFormatType_t
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{
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VTF_CONSOLE_360,
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VTF_CONSOLE_PS3
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};
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//-----------------------------------------------------------------------------
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// Various methods related to pixelmaps and color formats
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//-----------------------------------------------------------------------------
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namespace ImageLoader
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{
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bool GetInfo( const char *fileName, int *width, int *height, enum ImageFormat *imageFormat, float *sourceGamma );
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// Generates a nice filter kernel
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void ComputeNiceFilterKernel( float flWRatio, float flHRatio, float flDRatio, KernelInfo_t *pKernel );
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void CleanupNiceFilterKernel( KernelInfo_t *pKernel );
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// adjustedheight received the height adjusted for compression (/4 for dxt)
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int GetMemRequired( int width, int height, int depth, ImageFormat imageFormat, bool mipmap, int *pAdjustedHeightOut = NULL );
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int GetMemRequired( int width, int height, int depth, int nMipmapCount, ImageFormat imageFormat, int *pAdjustedHeightOut = NULL );
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// This version is for mipmaps which are stored biggest level to smallest level in memory
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int GetMipMapLevelByteOffset( int width, int height, ImageFormat imageFormat, int skipMipLevels, int nDepth = 1 );
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// This version is for mipmaps which are stored smallest level to largest level in memory
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int GetMipMapLevelByteOffsetReverse( int nWidth, int nHeight, int nDepth, int nTotalMipCount, ImageFormat imageFormat, int nMipLevel );
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void GetMipMapLevelDimensions( int *width, int *height, int skipMipLevels );
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void GetMipMapLevelDimensions( int &nWidth, int &nHeight, int &nDepth, int nMipLevel );
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int GetNumMipMapLevels( int width, int height, int depth = 1 );
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bool Load( unsigned char *imageData, const char *fileName, int width, int height, ImageFormat imageFormat, float targetGamma, bool mipmap );
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bool Load( unsigned char *imageData, FILE *fp, int width, int height,
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enum ImageFormat imageFormat, float targetGamma, bool mipmap );
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// convert from any image format to any other image format.
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// return false if the conversion cannot be performed.
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// Strides denote the number of bytes per each line,
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// by default assumes width * # of bytes per pixel
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bool ConvertImageFormat( const unsigned char *src, enum ImageFormat srcImageFormat,
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unsigned char *dst, enum ImageFormat dstImageFormat,
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int width, int height, int srcStride = 0, int dstStride = 0 );
|
|
|
|
// must be used in conjunction with ConvertImageFormat() to pre-swap and post-swap
|
|
void PreConvertSwapImageData( unsigned char *pImageData, int nImageSize, ImageFormat imageFormat, VtfConsoleFormatType_t targetConsole, int width = 0, int stride = 0 );
|
|
void PostConvertSwapImageData( unsigned char *pImageData, int nImageSize, ImageFormat imageFormat, VtfConsoleFormatType_t targetConsole, int width = 0, int stride = 0 );
|
|
void ByteSwapImageData( unsigned char *pImageData, int nImageSize, ImageFormat imageFormat, int width = 0, int stride = 0 );
|
|
bool IsFormatValidForConversion( ImageFormat fmt );
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// convert back and forth from D3D format to ImageFormat, regardless of
|
|
// whether it's supported or not
|
|
// FIXME: Move into shaderapidx8/rendersystemdx9
|
|
//-----------------------------------------------------------------------------
|
|
ImageFormat D3DFormatToImageFormat( D3DFORMAT format );
|
|
D3DFORMAT ImageFormatToD3DFormat( ImageFormat format );
|
|
|
|
// Flags for ResampleRGBA8888
|
|
enum
|
|
{
|
|
RESAMPLE_NORMALMAP = 0x1,
|
|
RESAMPLE_ALPHATEST = 0x2,
|
|
RESAMPLE_NICE_FILTER = 0x4,
|
|
RESAMPLE_CLAMPS = 0x8,
|
|
RESAMPLE_CLAMPT = 0x10,
|
|
RESAMPLE_CLAMPU = 0x20,
|
|
};
|
|
|
|
struct ResampleInfo_t
|
|
{
|
|
|
|
ResampleInfo_t() : m_nFlags(0), m_flAlphaThreshhold(0.4f), m_flAlphaHiFreqThreshhold(0.4f), m_nSrcDepth(1), m_nDestDepth(1)
|
|
{
|
|
m_flColorScale[0] = 1.0f, m_flColorScale[1] = 1.0f, m_flColorScale[2] = 1.0f, m_flColorScale[3] = 1.0f;
|
|
m_flColorGoal[0] = 0.0f, m_flColorGoal[1] = 0.0f, m_flColorGoal[2] = 0.0f, m_flColorGoal[3] = 0.0f;
|
|
}
|
|
|
|
unsigned char *m_pSrc;
|
|
unsigned char *m_pDest;
|
|
|
|
int m_nSrcWidth;
|
|
int m_nSrcHeight;
|
|
int m_nSrcDepth;
|
|
|
|
int m_nDestWidth;
|
|
int m_nDestHeight;
|
|
int m_nDestDepth;
|
|
|
|
float m_flSrcGamma;
|
|
float m_flDestGamma;
|
|
|
|
float m_flColorScale[4]; // Color scale factors RGBA
|
|
float m_flColorGoal[4]; // Color goal values RGBA DestColor = ColorGoal + scale * (SrcColor - ColorGoal)
|
|
|
|
float m_flAlphaThreshhold;
|
|
float m_flAlphaHiFreqThreshhold;
|
|
|
|
int m_nFlags;
|
|
};
|
|
|
|
bool ResampleRGBA8888( const ResampleInfo_t &info );
|
|
bool ResampleRGBA16161616( const ResampleInfo_t &info );
|
|
bool ResampleRGB323232F( const ResampleInfo_t &info );
|
|
bool ResampleRGBA32323232F( const ResampleInfo_t &info );
|
|
|
|
void ConvertNormalMapRGBA8888ToDUDVMapUVLX8888( const unsigned char *src, int width, int height, unsigned char *dst_ );
|
|
void ConvertNormalMapRGBA8888ToDUDVMapUVWQ8888( const unsigned char *src, int width, int height, unsigned char *dst_ );
|
|
void ConvertNormalMapRGBA8888ToDUDVMapUV88( const unsigned char *src, int width, int height, unsigned char *dst_ );
|
|
void ConvertNormalMapARGB8888ToDXT5GA( const unsigned char *src, unsigned char *dst, int width, int height );
|
|
|
|
void ConvertIA88ImageToNormalMapRGBA8888( const unsigned char *src, int width,
|
|
int height, unsigned char *dst,
|
|
float bumpScale );
|
|
|
|
void NormalizeNormalMapRGBA8888( unsigned char *src, int numTexels );
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Gamma correction
|
|
//-----------------------------------------------------------------------------
|
|
void GammaCorrectRGBA8888( unsigned char *src, unsigned char* dst,
|
|
int width, int height, int depth, float srcGamma, float dstGamma );
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Makes a gamma table
|
|
//-----------------------------------------------------------------------------
|
|
void ConstructGammaTable( unsigned char* pTable, float srcGamma, float dstGamma );
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Gamma corrects using a previously constructed gamma table
|
|
//-----------------------------------------------------------------------------
|
|
void GammaCorrectRGBA8888( unsigned char* pSrc, unsigned char* pDst,
|
|
int width, int height, int depth, unsigned char* pGammaTable );
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Generates a number of mipmap levels
|
|
//-----------------------------------------------------------------------------
|
|
void GenerateMipmapLevels( unsigned char* pSrc, unsigned char* pDst, int width,
|
|
int height, int depth, ImageFormat imageFormat, float srcGamma, float dstGamma,
|
|
int numLevels = 0 );
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// operations on square images (src and dst can be the same)
|
|
//-----------------------------------------------------------------------------
|
|
bool RotateImageLeft( const unsigned char *src, unsigned char *dst,
|
|
int widthHeight, ImageFormat imageFormat );
|
|
bool RotateImage180( const unsigned char *src, unsigned char *dst,
|
|
int widthHeight, ImageFormat imageFormat );
|
|
bool FlipImageVertically( void *pSrc, void *pDst, int nWidth, int nHeight, ImageFormat imageFormat, int nDstStride = 0 );
|
|
bool FlipImageHorizontally( void *pSrc, void *pDst, int nWidth, int nHeight, ImageFormat imageFormat, int nDstStride = 0 );
|
|
bool SwapAxes( unsigned char *src,
|
|
int widthHeight, ImageFormat imageFormat );
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Returns info about each image format
|
|
//-----------------------------------------------------------------------------
|
|
const ImageFormatInfo_t &ImageFormatInfo( ImageFormat fmt );
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Gets the name of the image format
|
|
//-----------------------------------------------------------------------------
|
|
inline char const* GetName( ImageFormat fmt )
|
|
{
|
|
return ImageFormatInfo(fmt).m_pName;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Gets the size of the image format in bytes. Be careful - compressed formats will return 0
|
|
//-----------------------------------------------------------------------------
|
|
inline int SizeInBytes( ImageFormat fmt )
|
|
{
|
|
return ImageFormatInfo(fmt).m_nNumBytes;
|
|
}
|
|
|
|
/// return the byte size of a given w/h. Works with compressed formats
|
|
inline int SizeInBytes( ImageFormat fmt, int nWidth, int nHeight )
|
|
{
|
|
ImageFormatInfo_t const &info = ImageFormatInfo( fmt );
|
|
if ( info.m_bIsCompressed )
|
|
{
|
|
// !!BUG!! hardcoded 4x4 block size, dxt1, dxt5
|
|
int nNumBytesPerBlock = 8;
|
|
if ( fmt == IMAGE_FORMAT_DXT5 )
|
|
{
|
|
nNumBytesPerBlock = 16;
|
|
}
|
|
return nNumBytesPerBlock * ( ( nWidth + 3 ) / 4 ) * ( ( nHeight +3 )/ 4 );
|
|
}
|
|
else
|
|
{
|
|
return info.m_nNumBytes * nWidth * nHeight;
|
|
}
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Does the image format support transparency?
|
|
//-----------------------------------------------------------------------------
|
|
inline bool IsTransparent( ImageFormat fmt )
|
|
{
|
|
return ImageFormatInfo(fmt).m_nNumAlphaBits > 0;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Is the image format compressed?
|
|
//-----------------------------------------------------------------------------
|
|
inline bool IsCompressed( ImageFormat fmt )
|
|
{
|
|
return ImageFormatInfo(fmt).m_bIsCompressed;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Is the image format compressed?
|
|
//-----------------------------------------------------------------------------
|
|
inline bool IsDepthFormat( ImageFormat fmt )
|
|
{
|
|
return ImageFormatInfo(fmt).m_bIsDepthFormat;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Is any channel > 8 bits?
|
|
//-----------------------------------------------------------------------------
|
|
inline bool HasChannelLargerThan8Bits( ImageFormat fmt )
|
|
{
|
|
ImageFormatInfo_t info = ImageFormatInfo(fmt);
|
|
return ( info.m_nNumRedBits > 8 || info.m_nNumGreenBits > 8 || info.m_nNumBlueBits > 8 || info.m_nNumAlphaBits > 8 );
|
|
}
|
|
|
|
inline bool IsFloatFormat( ImageFormat fmt )
|
|
{
|
|
return ( fmt == IMAGE_FORMAT_RGBA16161616F ) ||
|
|
( fmt == IMAGE_FORMAT_RG1616F ) ||
|
|
( fmt == IMAGE_FORMAT_R32F ) ||
|
|
( fmt == IMAGE_FORMAT_RG3232F ) ||
|
|
( fmt == IMAGE_FORMAT_RGB323232F ) ||
|
|
( fmt == IMAGE_FORMAT_RGBA32323232F );
|
|
}
|
|
|
|
inline bool IsRuntimeCompressed( ImageFormat fmt )
|
|
{
|
|
return ( fmt == IMAGE_FORMAT_DXT1_RUNTIME ) || ( fmt == IMAGE_FORMAT_DXT5_RUNTIME );
|
|
}
|
|
|
|
} // end namespace ImageLoader
|
|
|
|
|
|
#endif // IMAGEFORMAT_H
|