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JurassicParkTrespasser/jp2_pc/Source/Lib/Renderer/Primitives/P5/DrawSubTriangleBumpTblEx.inl

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/***********************************************************************************************
*
* Copyright © DreamWorks Interactive, 1997.
*
* Contents:
* Specialized (non-template) versions of the DrawSubtriangle function.
* Optimized for the Pentium Processor
*
***********************************************************************************************
*
* $Log:: /JP2_PC/Source/Lib/Renderer/Primitives/P5/DrawSubTriangleBumpTblEx.cpp $
*
* 7 98.08.13 4:26p Mmouni
* Changes for VC++ 5.0sp3 compatibility.
*
* 6 97/10/12 21:40 Speter
* Changed BumpLookup.au1CosToIntensity to au1IntensityTrans.
*
* 5 9/01/97 8:02p Rwyatt
* ANDs added to enable tiling
*
* 4 97/07/18 3:29p Pkeet
* Removed use of the 'b_right' parameter from DrawSubTriangle.
*
* 3 97/07/16 15:49 Speter
* Commented out redundant static delcarations now that all DrawSubTriangles are included into
* one file (now just declared in DrawSubTriangleEx.cpp.)
*
* 2 7/14/97 12:36p Rwyatt
* Checkled in so Scott can move them....
*
* 2 7/14/97 12:36p Rwyatt
* Checkled in so Scott can move them....
*
* 1 7/07/97 7:26p Rwyatt
* Initial Implementation of Pentium Specific bump mapping
*
***********************************************************************************************
***********************************************************************************************
*
* 2 6/19/97 2:53p Mlange
* Moved Profile.hpp to Lib/Sys.
*
* 1 97/06/14 6:46p Pkeet
* Initial version.
*
* 17 97/06/12 5:56p Pkeet
* Added capability to render only every other scanline and to double the number of scanlines.
*
* 16 97/06/11 4:58p Pkeet
* Added opaque versions of the optimized copy primitives.
*
* 15 6/11/97 4:11p Rwyatt
* Removed 3 AGIs and 2 PRO stalls from the perspective primitive. These stalls were costing
* about 40 clocks and the net result is 50% speed increase!!!!!!!!
*
* 14 6/11/97 2:45p Rwyatt
* Removed 2 AGI stalls from the linear copy
*
* 13 6/11/97 2:04a Rwyatt
* Slight;y optimized, need to run through V-Tune so we can spot any stalls
*
* 12 6/10/97 10:02p Rwyatt
* Blazing linear transparent copy
*
* 11 6/10/97 4:34p Rwyatt
* Slightly optimized perspective copy primitive
*
* 10 97/06/10 2:27p Pkeet
* Moved the bumpmap routines into a seperate module.
*
* 9 97/06/10 1:20p Pkeet
* Added initial assembly optimizations for bumpmap linear routines.
*
* 8 97/06/10 12:53p Pkeet
* Fixed bug in bumpmap assembly.
*
* 7 97/06/10 10:51a Pkeet
* Added initial assembly optimization passes for perspective corrected bumpmapping for both
* transparent and non-transparent versions.
*
* 6 97/06/09 6:38p Pkeet
* Algorithmic optimizations.
*
* 5 97/06/08 4:16p Pkeet
* Added perspective correction bump map primitives.
*
* 4 97/06/06 8:51p Pkeet
* Added linear.
*
* 3 97/06/06 6:44p Pkeet
* Moved the inner loop to self-modifying code.
*
* 2 97/06/06 4:36p Pkeet
* It works again.
*
* 1 97/06/04 6:46p Pkeet
* Initial specialized version of DrawSubTriangle.
*
**********************************************************************************************/
#include "Common.hpp"
#include "Lib/Sys/Profile.hpp"
#include "Lib/View/Raster.hpp"
#include "Lib/Renderer/Primitives/DrawTriangle.hpp"
//
// Temporary Globals.
//
// Notes:
// These variables should be arraigned along with the external globals for maximum
// cache efficiency.
//
// Try to make variabels that would be local static so I do not need to use EBP to reference them.
// Variables that must be static can be force referenced by ESP if required.
// Note: the following static variables are declared in DrawSubTriangleBumpEx.cpp, which is
// included before me. These should be made global instead.
extern uint32 u4ClutIndex;
// Declared in DrawSubTriangleEx.cpp. Should be moved and renamed.
/*
static int i_x_from;
static int i_x_to;
static int i_screen_index;
static int i_pixel;
*/
//*****************************************************************************************
//
// Bumpmapped and Perspective correct for 16 bit screen.
//
void DrawSubtriangle(TBumpPerspTbl* pscan, CDrawPolygon<TBumpPerspTbl>* pdtri)
{
//
// Do self-modifications here.
//
uint32 u4_table_address = (uint32)au1IntensityTrans;
__asm
{
mov eax, [au1SubBumpToIntensity] // Load the pointer to the angle to intensity lookup table.
mov ebx, [pvClutConversion] // Clut conversion pointer.
mov ecx, [pvTextureBitmap]
mov edx, dword ptr[u4_table_address]
mov [MODIFY_FOR_ANGLETOINTENSITY-4], eax
mov [MODIFY_FOR_CLUT_CONVERSION-4], ebx
mov [MODIFY_FOR_TEXTUREPOINTER_A-4], ecx
add ecx, 3
mov [MODIFY_FOR_TEXTUREPOINTER_B-4], ecx
mov [MODIFY_FOR_BUMPMAP_TABLE - 4], edx
// scan line direction
cmp i4ScanlineDirection,0
jle short MDEC
// +ve
mov byte ptr [MODIFY_DIRECTION], 047h // inc edi
jmp short MDONE
MDEC:
// -ve
mov byte ptr [MODIFY_DIRECTION], 04Fh // dec edi
MDONE:
}
//
// Iterate through the scanlines that intersect the subtriangle.
//
do
{
if (bRIGHT_TO_LEFT)
{
i_x_from = (pscan->fxX.i4Fx - pdtri->fxLineLength.i4Fx)>>16;
i_x_to = (pscan->fxX.i4Fx)>>16;
i_screen_index = pdtri->iLineStartIndex + i_x_from - 1;
i_pixel = i_x_to - i_x_from;
}
else
{
i_x_from = (pscan->fxX.i4Fx)>>16;
i_x_to = (pscan->fxX.i4Fx + pdtri->fxLineLength.i4Fx)>>16;
i_screen_index = pdtri->iLineStartIndex + i_x_to;
i_pixel = i_x_from - i_x_to;
}
// Draw if there are pixels to draw.
if (i_x_to > i_x_from && !(bEvenScanlinesOnly && ((pdtri->iY & 1) == 0)))
{
// Get the start address for the scanline on the destination raster.
TBumpPerspTbl::TPixel* apix_screen = (TBumpPerspTbl::TPixel*)pdtri->prasScreen->pSurface;
apix_screen += i_screen_index;
TBumpPerspTbl::TIndex index(pscan->indCoord, i_pixel);
//
// Iterate left or right along the destination scanline depending on the sign of
// 'i4ScanlineDirection.'
//
for (;;)
{
// Do next subdivision.
int i_pixel_inner = index.i4StartSubdivision(i_pixel);
TBumpPerspTbl::TPixel* apix_screen_inner = apix_screen + i_pixel;
__asm
{
mov edi, i_pixel_inner
mov esi, [w2dTex]CWalk2D.uUFrac
mov ecx, [w2dTex]CWalk2D.uVFrac
mov edx, [w2dTex + 4]CWalk2D.iUVInt
push ebp
mov ebp, apix_screen_inner
jmp short BEGIN_INNER_LOOP
BEGIN_INNER_LOOP:
and edx, [u4TextureTileMask]
xor ebx, ebx
mov bl, byte ptr[edx*4 + 0x12345678]
MODIFY_FOR_TEXTUREPOINTER_B:
mov byte ptr[u4ClutIndex], bl
mov ebx, [edx*4 + 0x12345678]
MODIFY_FOR_TEXTUREPOINTER_A:
sub ebx, [u4LightTheta]
xor eax, eax
and ebx, iMASK_ANGLETABLE_LOOKUP
movzx ebx, byte ptr[ebx + 0x12345678]
MODIFY_FOR_ANGLETOINTENSITY:
movzx eax, byte ptr[ebx + 0x12345678]
MODIFY_FOR_BUMPMAP_TABLE:
shl eax, 8
xor ebx, ebx
add eax, [u4ClutIndex]
mov bx, word ptr[eax*2 + 0x12345678]
MODIFY_FOR_CLUT_CONVERSION:
// Add the V fractional values together and store the carry.
add ecx, [w2dDeltaTex]CWalk2D.uVFrac
sbb eax, eax
// Add the U fractional values, setting the carry flag.
add esi, [w2dDeltaTex]CWalk2D.uUFrac
// Add the integer values from the integer table, and add a possible carry.
adc edx, [w2dDeltaTex + eax*4 + 4]CWalk2D.iUVInt
mov word ptr[ebp + edi*2], bx
//
// Increment the inner loop screen index. This nop will get modified into
// an inc or dec edi
//
MODIFY_DIRECTION: nop
jnz short BEGIN_INNER_LOOP
// Store the modified variables.
pop ebp
mov [w2dTex]CWalk2D.uUFrac, esi
mov [w2dTex]CWalk2D.uVFrac, ecx
mov [w2dTex + 4]CWalk2D.iUVInt, edx
}
// Exit scanline routine if there are no more pixels to render.
if (i_pixel == 0)
break;
// Implement perspective correction.
index.UpdatePerspective(0);
}
}
// Increment the base edge.
++*pdtri->pedgeBase;
// Set the new length of the line to be rasterized.
pdtri->fxLineLength.i4Fx += pdtri->fxDeltaLineLength.i4Fx;
// Get new starting pixel TIndex for the scanline.
pdtri->iLineStartIndex += pdtri->prasScreen->iLinePixels;
}
while (++pdtri->iY < pdtri->iYTo);
}
//*****************************************************************************************
//
// Bumpmapped and Linear for 16 bit screen.
//
void DrawSubtriangle(TBumpLinearTbl* pscan, CDrawPolygon<TBumpLinearTbl>* pdtri)
{
//
// Do self-modifications here.
//
uint32 u4_table_address = (uint32)au1IntensityTrans;
__asm
{
mov ecx, [pvTextureBitmap]
mov eax, [au1SubBumpToIntensity] // Load the pointer to the angle to intensity lookup table.
mov ebx, [pvClutConversion] // Clut conversion pointer.
mov edx, dword ptr[u4_table_address]
mov [MODIFY_FOR_TEXTUREPOINTER_A-4], ecx
mov [MODIFY_FOR_ANGLETOINTENSITY-4], eax
add ecx, 3
mov [MODIFY_FOR_CLUT_CONVERSION-4], ebx
mov [MODIFY_FOR_TEXTUREPOINTER_B-4], ecx
mov [MODIFY_FOR_BUMPMAP_TABLE - 4], edx
// scan line direction
cmp i4ScanlineDirection,0
jle short MDEC
// +ve
mov byte ptr [MODIFY_DIRECTION], 047h // inc edi
jmp short MDONE
MDEC:
// -ve
mov byte ptr [MODIFY_DIRECTION], 04Fh // dec edi
MDONE:
}
//
// Iterate through the scanlines that intersect the subtriangle.
//
do
{
if (bRIGHT_TO_LEFT)
{
i_x_from = (pscan->fxX.i4Fx - pdtri->fxLineLength.i4Fx)>>16;
i_x_to = (pscan->fxX.i4Fx)>>16;
i_screen_index = pdtri->iLineStartIndex + i_x_from - 1;
i_pixel = i_x_to - i_x_from;
}
else
{
i_x_from = (pscan->fxX.i4Fx)>>16;
i_x_to = (pscan->fxX.i4Fx + pdtri->fxLineLength.i4Fx)>>16;
i_screen_index = pdtri->iLineStartIndex + i_x_to;
i_pixel = i_x_from - i_x_to;
}
// Draw if there are pixels to draw.
if (i_x_to > i_x_from && !(bEvenScanlinesOnly && ((pdtri->iY & 1) == 0)))
{
// Get the start address for the scanline on the destination raster.
TBumpLinearTbl::TPixel* apix_screen = (TBumpLinearTbl::TPixel*)pdtri->prasScreen->pSurface;
// Iterate left or right along the destination scanline.
__asm
{
mov eax, pscan
mov ecx, i_screen_index
mov edi, apix_screen
push ebp
mov edx, [eax]TBumpLinearTbl.indCoord.w1dV.bfxValue.i4Int
mov esi, [eax]TBumpLinearTbl.indCoord.bfU.u4Frac
lea ebp, [edi+ecx*2]
mov ecx, [eax]TBumpLinearTbl.indCoord.w1dV.bfxValue.u4Frac
add edx, [eax]TBumpLinearTbl.indCoord.bfU.i4Int
mov edi, i_pixel
jmp short BEGIN_INNER_LOOP
INNER_LOOP:
// Add the U fractional values, setting the carry flag.
add esi, [w2dDeltaTex]CWalk2D.uUFrac
// Add the integer values from the integer table, and add a possible carry.
adc edx, [w2dDeltaTex + eax*4 + 4]CWalk2D.iUVInt
BEGIN_INNER_LOOP:
and edx, [u4TextureTileMask]
movzx eax, byte ptr[edx*4 + 0x12345678]
MODIFY_FOR_TEXTUREPOINTER_B:
mov ebx, [edx*4 + 0x12345678]
MODIFY_FOR_TEXTUREPOINTER_A:
sub ebx, [u4LightTheta]
and ebx, iMASK_ANGLETABLE_LOOKUP
movzx ebx, byte ptr[ebx + 0x12345678]
MODIFY_FOR_ANGLETOINTENSITY:
movzx ebx, byte ptr[ebx + 0x12345678]
MODIFY_FOR_BUMPMAP_TABLE:
shl ebx, 8
add eax, ebx
xor ebx,ebx
mov bx, word ptr[eax*2 + 0x12345678]
MODIFY_FOR_CLUT_CONVERSION:
// Add the V fractional values together and store the carry.
add ecx, [w2dDeltaTex]CWalk2D.uVFrac
sbb eax, eax
mov word ptr[ebp + edi*2], bx
MODIFY_DIRECTION: nop
jnz short INNER_LOOP
// Restore the base pointer.
pop ebp
}
}
// Increment the base edge.
++*pdtri->pedgeBase;
// Set the new length of the line to be rasterized.
pdtri->fxLineLength.i4Fx += pdtri->fxDeltaLineLength.i4Fx;
// Get new starting pixel TIndex for the scanline.
pdtri->iLineStartIndex += pdtri->prasScreen->iLinePixels;
}
while (++pdtri->iY < pdtri->iYTo);
}
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