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2020-08-04 13:13:01 -04:00

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C++

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//
//===========================================================================//
#ifndef PIXELWRITER_H
#define PIXELWRITER_H
#ifdef _WIN32
#pragma once
#endif
#ifdef _WIN32
#define FORCEINLINE_PIXEL FORCEINLINE
#elif POSIX
#define FORCEINLINE_PIXEL inline
#else
#error "implement me"
#endif
#include "bitmap/imageformat.h"
#include "mathlib/compressed_vector.h"
#include "mathlib/ssemath.h"
#include "tier0/dbg.h"
//-----------------------------------------------------------------------------
// Color writing class
//-----------------------------------------------------------------------------
class CPixelWriter {
public:
FORCEINLINE void SetPixelMemory(ImageFormat format, void *pMemory,
int stride);
FORCEINLINE void *GetPixelMemory() { return m_pBase; }
// this is no longer used:
#if 0 // defined( _X360 )
// set after SetPixelMemory()
FORCEINLINE void ActivateByteSwapping( bool bSwap );
#endif
FORCEINLINE void Seek(int x, int y);
FORCEINLINE void *SkipBytes(int n);
FORCEINLINE void SkipPixels(int n);
FORCEINLINE void WritePixel(int r, int g, int b, int a = 255);
FORCEINLINE void WritePixelNoAdvance(int r, int g, int b, int a = 255);
FORCEINLINE void WritePixelSigned(int r, int g, int b, int a = 255);
FORCEINLINE void WritePixelNoAdvanceSigned(int r, int g, int b,
int a = 255);
FORCEINLINE void ReadPixelNoAdvance(int &r, int &g, int &b, int &a);
// Floating point formats
FORCEINLINE void WritePixelNoAdvanceF(float r, float g, float b,
float a = 1.0f);
FORCEINLINE void WritePixelF(float r, float g, float b, float a = 1.0f);
// SIMD formats
FORCEINLINE void WritePixel(FLTX4 rgba);
FORCEINLINE void WritePixelNoAdvance(FLTX4 rgba);
#ifdef _X360
// here are some explicit formats so we can avoid the switch:
FORCEINLINE void WritePixelNoAdvance_RGBA8888(FLTX4 rgba);
FORCEINLINE void WritePixelNoAdvance_BGRA8888(FLTX4 rgba);
// as above, but with m_pBits passed in to avoid a LHS
FORCEINLINE void WritePixelNoAdvance_BGRA8888(FLTX4 rgba, void *pBits);
// for writing entire SIMD registers at once when they have
// already been packed, and when m_pBits is vector-aligned
// (which is a requirement for write-combined memory)
// offset is added to m_pBits (saving you from the obligatory
// LHS of a SkipBytes)
FORCEINLINE void WriteFourPixelsExplicitLocation_BGRA8888(FLTX4 rgba,
int offset);
#endif
FORCEINLINE unsigned char GetPixelSize() { return m_Size; }
FORCEINLINE bool IsUsingFloatFormat() const;
FORCEINLINE unsigned char *GetCurrentPixel() { return m_pBits; }
private:
enum {
PIXELWRITER_USING_FLOAT_FORMAT = 0x01,
PIXELWRITER_USING_16BIT_FLOAT_FORMAT = 0x02,
PIXELWRITER_SWAPBYTES = 0x04,
};
unsigned char *m_pBase;
unsigned char *m_pBits;
unsigned short m_BytesPerRow;
unsigned char m_Size;
unsigned char m_nFlags;
signed short m_RShift;
signed short m_GShift;
signed short m_BShift;
signed short m_AShift;
unsigned int m_RMask;
unsigned int m_GMask;
unsigned int m_BMask;
unsigned int m_AMask;
#ifdef _X360
ImageFormat m_Format;
public:
inline const ImageFormat &GetFormat() { return m_Format; }
private:
#endif
};
FORCEINLINE_PIXEL bool CPixelWriter::IsUsingFloatFormat() const {
return (m_nFlags & PIXELWRITER_USING_FLOAT_FORMAT) != 0;
}
FORCEINLINE_PIXEL void CPixelWriter::SetPixelMemory(ImageFormat format,
void *pMemory, int stride) {
m_pBits = (unsigned char *)pMemory;
m_pBase = m_pBits;
m_BytesPerRow = (unsigned short)stride;
m_nFlags = 0;
#ifdef _X360
m_Format = format;
#endif
switch (format) {
case IMAGE_FORMAT_R32F: // NOTE! : the low order bits are first in this
// naming convention.
m_Size = 4;
m_RShift = 0;
m_GShift = 0;
m_BShift = 0;
m_AShift = 0;
m_RMask = 0xFFFFFFFF;
m_GMask = 0x0;
m_BMask = 0x0;
m_AMask = 0x0;
m_nFlags |= PIXELWRITER_USING_FLOAT_FORMAT;
break;
case IMAGE_FORMAT_RGBA32323232F:
m_Size = 16;
m_RShift = 0;
m_GShift = 32;
m_BShift = 64;
m_AShift = 96;
m_RMask = 0xFFFFFFFF;
m_GMask = 0xFFFFFFFF;
m_BMask = 0xFFFFFFFF;
m_AMask = 0xFFFFFFFF;
m_nFlags |= PIXELWRITER_USING_FLOAT_FORMAT;
break;
case IMAGE_FORMAT_RGBA16161616F:
m_Size = 8;
m_RShift = 0;
m_GShift = 16;
m_BShift = 32;
m_AShift = 48;
m_RMask = 0xFFFF;
m_GMask = 0xFFFF;
m_BMask = 0xFFFF;
m_AMask = 0xFFFF;
m_nFlags |= PIXELWRITER_USING_FLOAT_FORMAT |
PIXELWRITER_USING_16BIT_FLOAT_FORMAT;
break;
case IMAGE_FORMAT_RGBA8888:
#if defined(_X360)
case IMAGE_FORMAT_LINEAR_RGBA8888:
#endif
m_Size = 4;
m_RShift = 0;
m_GShift = 8;
m_BShift = 16;
m_AShift = 24;
m_RMask = 0xFF;
m_GMask = 0xFF;
m_BMask = 0xFF;
m_AMask = 0xFF;
break;
case IMAGE_FORMAT_BGRA8888: // NOTE! : the low order bits are first in
// this naming convention.
#if defined(_X360)
case IMAGE_FORMAT_LINEAR_BGRA8888:
#endif
m_Size = 4;
m_RShift = 16;
m_GShift = 8;
m_BShift = 0;
m_AShift = 24;
m_RMask = 0xFF;
m_GMask = 0xFF;
m_BMask = 0xFF;
m_AMask = 0xFF;
break;
case IMAGE_FORMAT_BGRX8888:
#if defined(_X360)
case IMAGE_FORMAT_LINEAR_BGRX8888:
#endif
m_Size = 4;
m_RShift = 16;
m_GShift = 8;
m_BShift = 0;
m_AShift = 24;
m_RMask = 0xFF;
m_GMask = 0xFF;
m_BMask = 0xFF;
m_AMask = 0x00;
break;
case IMAGE_FORMAT_BGRA4444:
m_Size = 2;
m_RShift = 4;
m_GShift = 0;
m_BShift = -4;
m_AShift = 8;
m_RMask = 0xF0;
m_GMask = 0xF0;
m_BMask = 0xF0;
m_AMask = 0xF0;
break;
case IMAGE_FORMAT_BGR888:
m_Size = 3;
m_RShift = 16;
m_GShift = 8;
m_BShift = 0;
m_AShift = 0;
m_RMask = 0xFF;
m_GMask = 0xFF;
m_BMask = 0xFF;
m_AMask = 0x00;
break;
case IMAGE_FORMAT_BGR565:
m_Size = 2;
m_RShift = 8;
m_GShift = 3;
m_BShift = -3;
m_AShift = 0;
m_RMask = 0xF8;
m_GMask = 0xFC;
m_BMask = 0xF8;
m_AMask = 0x00;
break;
case IMAGE_FORMAT_BGRA5551:
case IMAGE_FORMAT_BGRX5551:
m_Size = 2;
m_RShift = 7;
m_GShift = 2;
m_BShift = -3;
m_AShift = 8;
m_RMask = 0xF8;
m_GMask = 0xF8;
m_BMask = 0xF8;
m_AMask = 0x80;
break;
// GR - alpha format for HDR support
case IMAGE_FORMAT_A8:
m_Size = 1;
m_RShift = 0;
m_GShift = 0;
m_BShift = 0;
m_AShift = 0;
m_RMask = 0x00;
m_GMask = 0x00;
m_BMask = 0x00;
m_AMask = 0xFF;
break;
case IMAGE_FORMAT_UVWQ8888:
m_Size = 4;
m_RShift = 0;
m_GShift = 8;
m_BShift = 16;
m_AShift = 24;
m_RMask = 0xFF;
m_GMask = 0xFF;
m_BMask = 0xFF;
m_AMask = 0xFF;
break;
case IMAGE_FORMAT_RGBA16161616:
#if defined(_X360)
case IMAGE_FORMAT_LINEAR_RGBA16161616:
#endif
m_Size = 8;
if (!IsX360()) {
m_RShift = 0;
m_GShift = 16;
m_BShift = 32;
m_AShift = 48;
} else {
m_RShift = 48;
m_GShift = 32;
m_BShift = 16;
m_AShift = 0;
}
m_RMask = 0xFFFF;
m_GMask = 0xFFFF;
m_BMask = 0xFFFF;
m_AMask = 0xFFFF;
break;
case IMAGE_FORMAT_I8:
// whatever goes into R is considered the intensity.
m_Size = 1;
m_RShift = 0;
m_GShift = 0;
m_BShift = 0;
m_AShift = 0;
m_RMask = 0xFF;
m_GMask = 0x00;
m_BMask = 0x00;
m_AMask = 0x00;
break;
// FIXME: Add more color formats as need arises
default: {
static bool format_error_printed[NUM_IMAGE_FORMATS];
if (!format_error_printed[format]) {
Assert(0);
Msg("CPixelWriter::SetPixelMemory: Unsupported image format "
"%i\n",
format);
format_error_printed[format] = true;
}
m_Size = 0; // set to zero so that we don't stomp memory for
// formats that we don't understand.
m_RShift = 0;
m_GShift = 0;
m_BShift = 0;
m_AShift = 0;
m_RMask = 0x00;
m_GMask = 0x00;
m_BMask = 0x00;
m_AMask = 0x00;
} break;
}
}
#if 0 // defined( _X360 )
FORCEINLINE void CPixelWriter::ActivateByteSwapping( bool bSwap )
{
// X360TBD: Who is trying to use this?
// Purposely not hooked up because PixelWriter has been ported to read/write native pixels only
Assert( 0 );
if ( bSwap && !(m_nFlags & PIXELWRITER_SWAPBYTES ) )
{
m_nFlags |= PIXELWRITER_SWAPBYTES;
// only tested with 4 byte formats
Assert( m_Size == 4 );
}
else if ( !bSwap && (m_nFlags & PIXELWRITER_SWAPBYTES ) )
{
m_nFlags &= ~PIXELWRITER_SWAPBYTES;
}
else
{
// same state
return;
}
// swap the shifts
m_RShift = 24-m_RShift;
m_GShift = 24-m_GShift;
m_BShift = 24-m_BShift;
m_AShift = 24-m_AShift;
}
#endif
//-----------------------------------------------------------------------------
// Sets where we're writing to
//-----------------------------------------------------------------------------
FORCEINLINE_PIXEL void CPixelWriter::Seek(int x, int y) {
m_pBits = m_pBase + y * m_BytesPerRow + x * m_Size;
}
//-----------------------------------------------------------------------------
// Skips n bytes:
//-----------------------------------------------------------------------------
FORCEINLINE_PIXEL void *CPixelWriter::SkipBytes(int n) RESTRICT {
m_pBits += n;
return m_pBits;
}
//-----------------------------------------------------------------------------
// Skips n pixels:
//-----------------------------------------------------------------------------
FORCEINLINE_PIXEL void CPixelWriter::SkipPixels(int n) {
SkipBytes(n * m_Size);
}
//-----------------------------------------------------------------------------
// Writes a pixel without advancing the index PC ONLY
//-----------------------------------------------------------------------------
FORCEINLINE_PIXEL void CPixelWriter::WritePixelNoAdvanceF(float r, float g,
float b, float a) {
Assert(IsUsingFloatFormat());
// X360TBD: Not ported
Assert(IsPC());
if (PIXELWRITER_USING_16BIT_FLOAT_FORMAT & m_nFlags) {
float16 fp16[4];
fp16[0].SetFloat(r);
fp16[1].SetFloat(g);
fp16[2].SetFloat(b);
fp16[3].SetFloat(a);
// fp16
unsigned short pBuf[4] = {0, 0, 0, 0};
pBuf[m_RShift >> 4] |= (fp16[0].GetBits() & m_RMask)
<< (m_RShift & 0xF);
pBuf[m_GShift >> 4] |= (fp16[1].GetBits() & m_GMask)
<< (m_GShift & 0xF);
pBuf[m_BShift >> 4] |= (fp16[2].GetBits() & m_BMask)
<< (m_BShift & 0xF);
pBuf[m_AShift >> 4] |= (fp16[3].GetBits() & m_AMask)
<< (m_AShift & 0xF);
memcpy(m_pBits, pBuf, m_Size);
} else {
// fp32
int pBuf[4] = {0, 0, 0, 0};
pBuf[m_RShift >> 5] |= (FloatBits(r) & m_RMask) << (m_RShift & 0x1F);
pBuf[m_GShift >> 5] |= (FloatBits(g) & m_GMask) << (m_GShift & 0x1F);
pBuf[m_BShift >> 5] |= (FloatBits(b) & m_BMask) << (m_BShift & 0x1F);
pBuf[m_AShift >> 5] |= (FloatBits(a) & m_AMask) << (m_AShift & 0x1F);
memcpy(m_pBits, pBuf, m_Size);
}
}
//-----------------------------------------------------------------------------
// Writes a pixel, advances the write index
//-----------------------------------------------------------------------------
FORCEINLINE_PIXEL void CPixelWriter::WritePixelF(float r, float g, float b,
float a) {
WritePixelNoAdvanceF(r, g, b, a);
m_pBits += m_Size;
}
//-----------------------------------------------------------------------------
// Writes a pixel, advances the write index
//-----------------------------------------------------------------------------
FORCEINLINE_PIXEL void CPixelWriter::WritePixel(int r, int g, int b, int a) {
WritePixelNoAdvance(r, g, b, a);
m_pBits += m_Size;
}
//-----------------------------------------------------------------------------
// Writes a pixel, advances the write index
//-----------------------------------------------------------------------------
FORCEINLINE_PIXEL void CPixelWriter::WritePixelSigned(int r, int g, int b,
int a) {
WritePixelNoAdvanceSigned(r, g, b, a);
m_pBits += m_Size;
}
//-----------------------------------------------------------------------------
// Writes a pixel without advancing the index
//-----------------------------------------------------------------------------
FORCEINLINE_PIXEL void CPixelWriter::WritePixelNoAdvance(int r, int g, int b,
int a) {
Assert(!IsUsingFloatFormat());
if (m_Size <= 0) {
return;
}
if (m_Size < 5) {
unsigned int val = (r & m_RMask) << m_RShift;
val |= (g & m_GMask) << m_GShift;
val |= (m_BShift > 0) ? ((b & m_BMask) << m_BShift)
: ((b & m_BMask) >> -m_BShift);
val |= (a & m_AMask) << m_AShift;
switch (m_Size) {
default:
Assert(0);
return;
case 1: {
m_pBits[0] = (unsigned char)((val & 0xff));
return;
}
case 2: {
((unsigned short *)m_pBits)[0] =
(unsigned short)((val & 0xffff));
return;
}
case 3: {
if (IsPC() || !IsX360()) {
((unsigned short *)m_pBits)[0] =
(unsigned short)((val & 0xffff));
m_pBits[2] = (unsigned char)((val >> 16) & 0xff);
} else {
m_pBits[0] = (unsigned char)(((val >> 16) & 0xff));
m_pBits[1] = (unsigned char)(((val >> 8) & 0xff));
m_pBits[2] = (unsigned char)(val & 0xff);
}
return;
}
case 4: {
((unsigned int *)m_pBits)[0] = val;
return;
}
}
} else // RGBA32323232 or RGBA16161616 -- PC only.
{
AssertMsg(!IsX360(),
"Unsupported lightmap format used in WritePixelNoAdvance(). "
"This is a severe performance fault.\n");
int64 val = ((int64)(r & m_RMask)) << m_RShift;
val |= ((int64)(g & m_GMask)) << m_GShift;
val |= (m_BShift > 0) ? (((int64)(b & m_BMask)) << m_BShift)
: (((int64)(b & m_BMask)) >> -m_BShift);
val |= ((int64)(a & m_AMask)) << m_AShift;
switch (m_Size) {
case 6: {
if (IsPC() || !IsX360()) {
((unsigned int *)m_pBits)[0] = val & 0xffffffff;
((unsigned short *)m_pBits)[2] =
(unsigned short)((val >> 32) & 0xffff);
} else {
((unsigned int *)m_pBits)[0] = (val >> 16) & 0xffffffff;
((unsigned short *)m_pBits)[2] =
(unsigned short)(val & 0xffff);
}
return;
}
case 8: {
if (IsPC() || !IsX360()) {
((unsigned int *)m_pBits)[0] = val & 0xffffffff;
((unsigned int *)m_pBits)[1] = (val >> 32) & 0xffffffff;
} else {
((unsigned int *)m_pBits)[0] = (val >> 32) & 0xffffffff;
((unsigned int *)m_pBits)[1] = val & 0xffffffff;
}
return;
}
default:
Assert(0);
return;
}
}
}
#ifdef _X360
// There isn't a PC port of these because of the many varied
// pixel formats the PC deals with. If you write SSE versions
// of all the various necessary packers, then this can be made
// to work on PC.
//-----------------------------------------------------------------------------
// Writes a pixel, advances the write index
//-----------------------------------------------------------------------------
FORCEINLINE_PIXEL void CPixelWriter::WritePixel(FLTX4 rgba) RESTRICT {
WritePixelNoAdvance(rgba);
m_pBits += m_Size;
}
//-----------------------------------------------------------------------------
// Writes a pixel without advancing the index
// rgba are four float values, each on the range 0..255 (though they may leak
// fractionally over 255 due to numerical errors earlier)
//-----------------------------------------------------------------------------
FORCEINLINE_PIXEL void CPixelWriter::WritePixelNoAdvance(FLTX4 rgba) RESTRICT {
Assert(!IsUsingFloatFormat());
switch (m_Size) {
case 0:
return;
case 4: {
AssertMsg((reinterpret_cast<unsigned int>(m_pBits) & 0x03) == 0,
"Unaligned m_pBits in WritePixelNoAdvance!");
switch (m_Format) {
// note: format names are low-order-byte first.
case IMAGE_FORMAT_RGBA8888:
case IMAGE_FORMAT_LINEAR_RGBA8888:
WritePixelNoAdvance_RGBA8888(rgba);
break;
case IMAGE_FORMAT_BGRA8888: // NOTE! : the low order bits are
// first in this naming convention.
case IMAGE_FORMAT_LINEAR_BGRA8888:
WritePixelNoAdvance_BGRA8888(rgba);
break;
default:
AssertMsg1(false,
"Unknown four-byte pixel format %d in lightmap "
"write.\n",
m_Format);
}
break;
}
default:
AssertMsg1(
false,
"WritePixelNoAdvance on unsupported 360 %d-byte format\n",
m_Size);
break;
}
}
// here are some explicit formats so we can avoid the switch:
FORCEINLINE void CPixelWriter::WritePixelNoAdvance_RGBA8888(FLTX4 rgba) {
// it's easier to do tiered convert-saturates here
// than the d3d color convertor op
// first permute
const static fltx4 permReverse = XMVectorPermuteControl(3, 2, 1, 0);
fltx4 N = XMVectorPermute(rgba, rgba, permReverse);
N = __vctuxs(N, 0); // convert to unsigned fixed point 0 w/ saturate
N = __vpkuwus(N, N); // convert to halfword saturate
N = __vpkuhus(N, N); // convert to byte saturate
N = __vspltw(N, 0); // splat w-word to all four
__stvewx(N, m_pBits, 0); // store whatever word happens to be aligned with
// m_pBits to that word
}
FORCEINLINE void CPixelWriter::WritePixelNoAdvance_BGRA8888(FLTX4 rgba) {
WritePixelNoAdvance_BGRA8888(rgba, m_pBits);
}
FORCEINLINE void CPixelWriter::WritePixelNoAdvance_BGRA8888(
FLTX4 rgba, void *RESTRICT pBits) RESTRICT {
// this happens to be in an order such that we can use the handy builtin
// packing op clamp to 0..255 (coz it might have leaked over)
static const fltx4 vTwoFiftyFive = {255.0f, 255.0f, 255.0f, 255.0f};
fltx4 N = MinSIMD(vTwoFiftyFive, rgba);
// the magic number such that when mul-accummulated against rbga,
// gets us a representation 3.0 + (r)*2^-22 -- puts the bits at
// the bottom of the float
static CONST XMVECTOR PackScale = {
(1.0f / (FLOAT)(1 << 22)), (1.0f / (FLOAT)(1 << 22)),
(1.0f / (FLOAT)(1 << 22)),
(1.0f / (FLOAT)(1 << 22))}; // 255.0f / (FLOAT)(1 << 22)
static const XMVECTOR Three = {3.0f, 3.0f, 3.0f, 3.0f};
N = __vmaddfp(N, PackScale, Three);
N = __vpkd3d(N, N, VPACK_D3DCOLOR, VPACK_32, 3); // pack to X word
N = __vspltw(N, 0); // splat X
// this is a nasty thing to work around the April XDK bug in __stvewx
{
void *RESTRICT copyOfPBits = pBits;
__stvewx(N, copyOfPBits, 0);
}
}
// for writing entire SIMD registers at once
FORCEINLINE void CPixelWriter::WriteFourPixelsExplicitLocation_BGRA8888(
FLTX4 rgba, int offset) {
Assert((reinterpret_cast<unsigned int>(m_pBits) & 15) ==
0); // assert alignment
XMStoreVector4A(m_pBits + offset, rgba);
}
#endif
//-----------------------------------------------------------------------------
// Writes a signed pixel without advancing the index
//-----------------------------------------------------------------------------
FORCEINLINE_PIXEL void CPixelWriter::WritePixelNoAdvanceSigned(int r, int g,
int b, int a) {
Assert(!IsUsingFloatFormat());
if (m_Size <= 0) {
return;
}
if (m_Size < 5) {
int val = (r & m_RMask) << m_RShift;
val |= (g & m_GMask) << m_GShift;
val |= (m_BShift > 0) ? ((b & m_BMask) << m_BShift)
: ((b & m_BMask) >> -m_BShift);
val |= (a & m_AMask) << m_AShift;
signed char *pSignedBits = (signed char *)m_pBits;
if (IsPC() || !IsX360()) {
switch (m_Size) {
case 4:
pSignedBits[3] = (signed char)((val >> 24) & 0xff);
// fall through intentionally.
case 3:
pSignedBits[2] = (signed char)((val >> 16) & 0xff);
// fall through intentionally.
case 2:
pSignedBits[1] = (signed char)((val >> 8) & 0xff);
// fall through intentionally.
case 1:
pSignedBits[0] = (signed char)((val & 0xff));
// fall through intentionally.
return;
}
} else {
switch (m_Size) {
case 4:
pSignedBits[0] = (signed char)((val >> 24) & 0xff);
pSignedBits[1] = (signed char)((val >> 16) & 0xff);
pSignedBits[2] = (signed char)((val >> 8) & 0xff);
pSignedBits[3] = (signed char)(val & 0xff);
break;
case 3:
pSignedBits[0] = (signed char)((val >> 16) & 0xff);
pSignedBits[1] = (signed char)((val >> 8) & 0xff);
pSignedBits[2] = (signed char)(val & 0xff);
break;
case 2:
pSignedBits[0] = (signed char)((val >> 8) & 0xff);
pSignedBits[1] = (signed char)(val & 0xff);
break;
case 1:
pSignedBits[0] = (signed char)(val & 0xff);
break;
}
}
} else {
int64 val = ((int64)(r & m_RMask)) << m_RShift;
val |= ((int64)(g & m_GMask)) << m_GShift;
val |= (m_BShift > 0) ? (((int64)(b & m_BMask)) << m_BShift)
: (((int64)(b & m_BMask)) >> -m_BShift);
val |= ((int64)(a & m_AMask)) << m_AShift;
signed char *pSignedBits = (signed char *)m_pBits;
if (IsPC() || !IsX360()) {
switch (m_Size) {
case 8:
pSignedBits[7] = (signed char)((val >> 56) & 0xff);
pSignedBits[6] = (signed char)((val >> 48) & 0xff);
// fall through intentionally.
case 6:
pSignedBits[5] = (signed char)((val >> 40) & 0xff);
pSignedBits[4] = (signed char)((val >> 32) & 0xff);
// fall through intentionally.
case 4:
pSignedBits[3] = (signed char)((val >> 24) & 0xff);
// fall through intentionally.
case 3:
pSignedBits[2] = (signed char)((val >> 16) & 0xff);
// fall through intentionally.
case 2:
pSignedBits[1] = (signed char)((val >> 8) & 0xff);
// fall through intentionally.
case 1:
pSignedBits[0] = (signed char)((val & 0xff));
break;
default:
Assert(0);
return;
}
} else {
switch (m_Size) {
case 8:
pSignedBits[0] = (signed char)((val >> 56) & 0xff);
pSignedBits[1] = (signed char)((val >> 48) & 0xff);
pSignedBits[2] = (signed char)((val >> 40) & 0xff);
pSignedBits[3] = (signed char)((val >> 32) & 0xff);
pSignedBits[4] = (signed char)((val >> 24) & 0xff);
pSignedBits[5] = (signed char)((val >> 16) & 0xff);
pSignedBits[6] = (signed char)((val >> 8) & 0xff);
pSignedBits[7] = (signed char)(val & 0xff);
break;
case 6:
pSignedBits[0] = (signed char)((val >> 40) & 0xff);
pSignedBits[1] = (signed char)((val >> 32) & 0xff);
pSignedBits[2] = (signed char)((val >> 24) & 0xff);
pSignedBits[3] = (signed char)((val >> 16) & 0xff);
pSignedBits[4] = (signed char)((val >> 8) & 0xff);
pSignedBits[5] = (signed char)(val & 0xff);
break;
case 4:
pSignedBits[0] = (signed char)((val >> 24) & 0xff);
pSignedBits[1] = (signed char)((val >> 16) & 0xff);
pSignedBits[2] = (signed char)((val >> 8) & 0xff);
pSignedBits[3] = (signed char)(val & 0xff);
break;
case 3:
pSignedBits[0] = (signed char)((val >> 16) & 0xff);
pSignedBits[1] = (signed char)((val >> 8) & 0xff);
pSignedBits[2] = (signed char)(val & 0xff);
break;
case 2:
pSignedBits[0] = (signed char)((val >> 8) & 0xff);
pSignedBits[1] = (signed char)(val & 0xff);
break;
case 1:
pSignedBits[0] = (signed char)(val & 0xff);
break;
default:
Assert(0);
return;
}
}
}
}
FORCEINLINE_PIXEL void CPixelWriter::ReadPixelNoAdvance(int &r, int &g, int &b,
int &a) {
Assert(!IsUsingFloatFormat());
int val = m_pBits[0];
if (m_Size > 1) {
if (IsPC() || !IsX360()) {
val |= (int)m_pBits[1] << 8;
if (m_Size > 2) {
val |= (int)m_pBits[2] << 16;
if (m_Size > 3) {
val |= (int)m_pBits[3] << 24;
}
}
} else {
val <<= 8;
val |= (int)m_pBits[1];
if (m_Size > 2) {
val <<= 8;
val |= (int)m_pBits[2];
if (m_Size > 3) {
val <<= 8;
val |= (int)m_pBits[3];
}
}
}
}
r = (val >> m_RShift) & m_RMask;
g = (val >> m_GShift) & m_GMask;
b = (val >> m_BShift) & m_BMask;
a = (val >> m_AShift) & m_AMask;
}
#endif // PIXELWRITER_H;