775 lines
21 KiB
C++
775 lines
21 KiB
C++
/*
|
|
* Portions of this file are copyright Rebirth contributors and licensed as
|
|
* described in COPYING.txt.
|
|
* Portions of this file are copyright Parallax Software and licensed
|
|
* according to the Parallax license below.
|
|
* See COPYING.txt for license details.
|
|
|
|
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
|
|
SOFTWARE CORPORATION ("PARALLAX"). PARALLAX, IN DISTRIBUTING THE CODE TO
|
|
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
|
|
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
|
|
IN USING, DISPLAYING, AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
|
|
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
|
|
FREE PURPOSES. IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
|
|
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES. THE END-USER UNDERSTANDS
|
|
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
|
|
COPYRIGHT 1993-1998 PARALLAX SOFTWARE CORPORATION. ALL RIGHTS RESERVED.
|
|
*/
|
|
|
|
/*
|
|
*
|
|
* Routines to draw the texture mapped scanlines.
|
|
*
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include "maths.h"
|
|
#include "gr.h"
|
|
#include "grdef.h"
|
|
#include "texmap.h"
|
|
#include "texmapl.h"
|
|
#include "scanline.h"
|
|
#include "strutil.h"
|
|
#include "dxxerror.h"
|
|
|
|
namespace dcx {
|
|
|
|
tmap_scanline_function_table tmap_scanline_functions;
|
|
|
|
#ifndef OGL
|
|
void c_tmap_scanline_flat()
|
|
{
|
|
uint8_t *dest;
|
|
int x, index = fx_xleft + (bytes_per_row * fx_y );
|
|
|
|
dest = reinterpret_cast<uint8_t *>(write_buffer + fx_xleft + (bytes_per_row * fx_y ) );
|
|
|
|
for (x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
*dest++ = tmap_flat_color;
|
|
}
|
|
// memset(dest,tmap_flat_color,fx_xright-fx_xleft+1);
|
|
}
|
|
#endif
|
|
|
|
void c_tmap_scanline_shaded()
|
|
{
|
|
int fade;
|
|
uint8_t tmp;
|
|
int x, index = fx_xleft + (bytes_per_row * fx_y );
|
|
|
|
auto dest = &write_buffer[fx_xleft + (bytes_per_row * fx_y)];
|
|
|
|
fade = tmap_flat_shade_value;
|
|
for (x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
tmp = *dest;
|
|
*dest++ = gr_fade_table[fade][tmp];
|
|
}
|
|
}
|
|
|
|
void c_tmap_scanline_lin_nolight()
|
|
{
|
|
uint c;
|
|
int x, index = fx_xleft + (bytes_per_row * fx_y );
|
|
fix u,v,dudx, dvdx;
|
|
|
|
u = fx_u;
|
|
v = fx_v*64;
|
|
dudx = fx_du_dx;
|
|
dvdx = fx_dv_dx*64;
|
|
|
|
auto dest = &write_buffer[fx_xleft + (bytes_per_row * fx_y)];
|
|
|
|
if (!Transparency_on) {
|
|
for (x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
*dest++ = static_cast<uint32_t>(pixptr[ (f2i(v)&(64*63)) + (f2i(u)&63) ]);
|
|
u += dudx;
|
|
v += dvdx;
|
|
}
|
|
} else {
|
|
for (x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
c = static_cast<uint32_t>(pixptr[ (f2i(v)&(64*63)) + (f2i(u)&63) ]);
|
|
if ( c!=255)
|
|
*dest = c;
|
|
dest++;
|
|
u += dudx;
|
|
v += dvdx;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
#if 1
|
|
void c_tmap_scanline_lin()
|
|
{
|
|
uint c;
|
|
int x, j, index = fx_xleft + (bytes_per_row * fx_y);
|
|
fix u,v,l,dudx, dvdx, dldx;
|
|
|
|
u = fx_u;
|
|
v = fx_v*64;
|
|
dudx = fx_du_dx;
|
|
dvdx = fx_dv_dx*64;
|
|
|
|
l = fx_l>>8;
|
|
dldx = fx_dl_dx/256;
|
|
auto dest = &write_buffer[fx_xleft + (bytes_per_row * fx_y)];
|
|
|
|
if (!Transparency_on) {
|
|
const auto pixPtrLocalCopy = pixptr;
|
|
auto &fadeTableLocalCopy = gr_fade_table;
|
|
unsigned long destlong;
|
|
|
|
x = fx_xright-fx_xleft+1;
|
|
|
|
if ((j = reinterpret_cast<uintptr_t>(dest) & 3) != 0)
|
|
{
|
|
j = 4 - j;
|
|
|
|
if (j > x)
|
|
j = x;
|
|
|
|
while (j > 0)
|
|
{
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
*dest++ = fadeTableLocalCopy[(l>>8)&0x7f][pixPtrLocalCopy[ (f2i(v)&(64*63)) + (f2i(u)&63) ] ];
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
x--;
|
|
j--;
|
|
}
|
|
}
|
|
|
|
j &= ~3;
|
|
while (j > 0)
|
|
{
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
destlong = fadeTableLocalCopy[(l>>8)&0x7f][pixPtrLocalCopy[ (f2i(v)&(64*63)) + (f2i(u)&63) ] ] << 24;
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
destlong |= fadeTableLocalCopy[(l>>8)&0x7f][pixPtrLocalCopy[ (f2i(v)&(64*63)) + (f2i(u)&63) ] ] << 16;
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
destlong |= fadeTableLocalCopy[(l>>8)&0x7f][pixPtrLocalCopy[ (f2i(v)&(64*63)) + (f2i(u)&63) ] ] << 8;
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
destlong |= fadeTableLocalCopy[(l>>8)&0x7f][pixPtrLocalCopy[ (f2i(v)&(64*63)) + (f2i(u)&63) ] ];
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
*reinterpret_cast<unsigned long *>(dest) = destlong;
|
|
dest += 4;
|
|
x -= 4;
|
|
j -= 4;
|
|
index += 4;
|
|
if (index+4 >= SWIDTH*SHEIGHT) return;
|
|
}
|
|
|
|
while (x-- > 0)
|
|
{
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
*dest++ = fadeTableLocalCopy[(l>>8)&0x7f][pixPtrLocalCopy[ (f2i(v)&(64*63)) + (f2i(u)&63) ] ];
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
}
|
|
|
|
} else {
|
|
for (x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
c = static_cast<uint32_t>(pixptr[ (f2i(v)&(64*63)) + (f2i(u)&63) ]);
|
|
if ( c!=TRANSPARENCY_COLOR)
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
*dest = gr_fade_table[(l >> 8)&0x7f][c];
|
|
//end edit -MM
|
|
dest++;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
}
|
|
}
|
|
}
|
|
|
|
#else
|
|
void c_tmap_scanline_lin()
|
|
{
|
|
uint8_t *dest;
|
|
uint c;
|
|
fix u,v,l,dudx, dvdx, dldx;
|
|
|
|
u = fx_u;
|
|
v = fx_v*64;
|
|
dudx = fx_du_dx;
|
|
dvdx = fx_dv_dx*64;
|
|
|
|
l = fx_l>>8;
|
|
dldx = fx_dl_dx/256;
|
|
dest = reinterpret_cast<uint8_t *>(write_buffer + fx_xleft + (bytes_per_row * fx_y) );
|
|
|
|
if (!Transparency_on) {
|
|
for (int x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
*dest++ = gr_fade_table[ (l&(0x7f00)) + static_cast<uint32_t>(pixptr[ (f2i(v)&(64*63)) + (f2i(u)&63) ]) ];
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
}
|
|
} else {
|
|
for (int x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
c = static_cast<uint32_t>(pixptr[ (f2i(v)&(64*63)) + (f2i(u)&63) ]);
|
|
if ( c!=255)
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
*dest = gr_fade_table[ (l&(0x7f00)) + c ];
|
|
//end edit -MM
|
|
dest++;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// This texture mapper uses floating point extensively and writes 8 pixels at once, so it likely works
|
|
// best on 64 bit RISC processors.
|
|
// WARNING: it is not endian clean. For big endian, reverse the shift counts in the unrolled loops. I
|
|
// have no means to test that, so I didn't try it. Please tell me if you get this to work on a big
|
|
// endian machine.
|
|
// If you're using an Alpha, use the Compaq compiler for this file for quite some fps more.
|
|
// Unfortunately, it won't compile the whole source, so simply compile everything, change the
|
|
// compiler to ccc, remove scanline.o and compile again.
|
|
// Please send comments/suggestions to falk.hueffner@student.uni-tuebingen.de.
|
|
static void c_fp_tmap_scanline_per()
|
|
{
|
|
uint c;
|
|
int x, j, index = fx_xleft + (bytes_per_row * fx_y);
|
|
double u, v, z, l, dudx, dvdx, dzdx, dldx, rec_z;
|
|
uint64_t destlong;
|
|
|
|
u = f2db(fx_u);
|
|
v = f2db(fx_v) * 64.0;
|
|
z = f2db(fx_z);
|
|
l = f2db(fx_l);
|
|
dudx = f2db(fx_du_dx);
|
|
dvdx = f2db(fx_dv_dx) * 64.0;
|
|
dzdx = f2db(fx_dz_dx);
|
|
dldx = f2db(fx_dl_dx);
|
|
|
|
rec_z = 1.0 / z; // gcc 2.95.2 is won't do this optimization itself
|
|
|
|
auto dest = &write_buffer[fx_xleft + (bytes_per_row * fx_y)];
|
|
x = fx_xright - fx_xleft + 1;
|
|
|
|
if (!Transparency_on) {
|
|
if (x >= 8) {
|
|
if ((j = reinterpret_cast<uintptr_t>(dest) & 7) != 0) {
|
|
j = 8 - j;
|
|
|
|
while (j > 0) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
*dest++ =
|
|
gr_fade_table[static_cast<int>(fabs(l))][
|
|
pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) +
|
|
((static_cast<int>(u * rec_z)) & 63)]];
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
x--;
|
|
j--;
|
|
}
|
|
}
|
|
|
|
j = x;
|
|
while (j >= 8) {
|
|
destlong =
|
|
(uint64_t) gr_fade_table[static_cast<int>(fabs(l))][
|
|
pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) +
|
|
((static_cast<int>(u * rec_z)) & 63)]];
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
destlong |=
|
|
(uint64_t) gr_fade_table[static_cast<int>(fabs(l))][
|
|
pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) +
|
|
((static_cast<int>(u * rec_z)) & 63)]] << 8;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
destlong |=
|
|
(uint64_t) gr_fade_table[static_cast<int>(fabs(l))][
|
|
pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) +
|
|
((static_cast<int>(u * rec_z)) & 63)]] << 16;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
destlong |=
|
|
(uint64_t) gr_fade_table[static_cast<int>(fabs(l))][
|
|
pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) +
|
|
((static_cast<int>(u * rec_z)) & 63)]] << 24;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
destlong |=
|
|
(uint64_t) gr_fade_table[static_cast<int>(fabs(l))][
|
|
pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) +
|
|
((static_cast<int>(u * rec_z)) & 63)]] << 32;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
destlong |=
|
|
(uint64_t) gr_fade_table[static_cast<int>(fabs(l))][
|
|
pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) +
|
|
((static_cast<int>(u * rec_z)) & 63)]] << 40;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
destlong |=
|
|
(uint64_t) gr_fade_table[static_cast<int>(fabs(l))][
|
|
pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) +
|
|
((static_cast<int>(u * rec_z)) & 63)]] << 48;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
destlong |=
|
|
(uint64_t) gr_fade_table[static_cast<int>(fabs(l))][
|
|
pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) +
|
|
((static_cast<int>(u * rec_z)) & 63)]] << 56;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
|
|
*(reinterpret_cast<uint64_t *>(dest)) = destlong;
|
|
dest += 8;
|
|
x -= 8;
|
|
j -= 8;
|
|
index += 8;
|
|
if (index+8 >= SWIDTH*SHEIGHT) return;
|
|
}
|
|
}
|
|
while (x-- > 0) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
*dest++ =
|
|
gr_fade_table[static_cast<int>(fabs(l))][
|
|
static_cast<uint32_t>(pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) + ((static_cast<int>(u * rec_z)) & 63)])];
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
}
|
|
} else {
|
|
if (x >= 8) {
|
|
if ((j = reinterpret_cast<uintptr_t>(dest) & 7) != 0) {
|
|
j = 8 - j;
|
|
|
|
while (j > 0) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
c = static_cast<uint32_t>(pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) + ((static_cast<int>(u * rec_z)) & 63)]);
|
|
if (c != 255)
|
|
*dest = gr_fade_table[static_cast<int>(fabs(l))][c];
|
|
dest++;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
x--;
|
|
j--;
|
|
}
|
|
}
|
|
|
|
j = x;
|
|
while (j >= 8) {
|
|
destlong = *(reinterpret_cast<uint64_t *>(dest));
|
|
c = static_cast<uint32_t>(pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) + ((static_cast<int>(u * rec_z)) & 63)]);
|
|
if (c != 255) {
|
|
destlong &= ~static_cast<uint64_t>(0xFF);
|
|
destlong |= static_cast<uint64_t>(gr_fade_table[static_cast<int>(fabs(l))][c]);
|
|
}
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
c = static_cast<uint32_t>(pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) + ((static_cast<int>(u * rec_z)) & 63)]);
|
|
if (c != 255) {
|
|
destlong &= ~(static_cast<uint64_t>(0xFF) << 8);
|
|
destlong |= static_cast<uint64_t>(gr_fade_table[static_cast<int>(fabs(l))][c]) << 8;
|
|
}
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
c = static_cast<uint32_t>(pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) + ((static_cast<int>(u * rec_z)) & 63)]);
|
|
if (c != 255) {
|
|
destlong &= ~(static_cast<uint64_t>(0xFF) << 16);
|
|
destlong |= static_cast<uint64_t>(gr_fade_table[static_cast<int>(fabs(l))][c]) << 16;
|
|
}
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
c = static_cast<uint32_t>(pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) + ((static_cast<int>(u * rec_z)) & 63)]);
|
|
if (c != 255) {
|
|
destlong &= ~(static_cast<uint64_t>(0xFF) << 24);
|
|
destlong |= static_cast<uint64_t>(gr_fade_table[static_cast<int>(fabs(l))][c]) << 24;
|
|
}
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
c = static_cast<uint32_t>(pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) + ((static_cast<int>(u * rec_z)) & 63)]);
|
|
if (c != 255) {
|
|
destlong &= ~(static_cast<uint64_t>(0xFF) << 32);
|
|
destlong |= static_cast<uint64_t>(gr_fade_table[static_cast<int>(fabs(l))][c]) << 32;
|
|
}
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
c = static_cast<uint32_t>(pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) + ((static_cast<int>(u * rec_z)) & 63)]);
|
|
if (c != 255) {
|
|
destlong &= ~(static_cast<uint64_t>(0xFF) << 40);
|
|
destlong |= static_cast<uint64_t>(gr_fade_table[static_cast<int>(fabs(l))][c]) << 40;
|
|
}
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
c = static_cast<uint32_t>(pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) + ((static_cast<int>(u * rec_z)) & 63)]);
|
|
if (c != 255) {
|
|
destlong &= ~(static_cast<uint64_t>(0xFF) << 48);
|
|
destlong |= static_cast<uint64_t>(gr_fade_table[static_cast<int>(fabs(l))][c]) << 48;
|
|
}
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
c = static_cast<uint32_t>(pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) + ((static_cast<int>(u * rec_z)) & 63)]);
|
|
if (c != 255) {
|
|
destlong &= ~(static_cast<uint64_t>(0xFF) << 56);
|
|
destlong |= static_cast<uint64_t>(gr_fade_table[static_cast<int>(fabs(l))][c]) << 56;
|
|
}
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
|
|
*(reinterpret_cast<uint64_t *>(dest)) = destlong;
|
|
dest += 8;
|
|
x -= 8;
|
|
j -= 8;
|
|
index += 8;
|
|
if (index+8 >= SWIDTH*SHEIGHT) return;
|
|
}
|
|
}
|
|
while (x-- > 0) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
c = static_cast<uint32_t>(pixptr[((static_cast<int>(v * rec_z)) & (64 * 63)) + ((static_cast<int>(u * rec_z)) & 63)]);
|
|
if (c != 255)
|
|
*dest = gr_fade_table[static_cast<int>(fabs(l))][c];
|
|
dest++;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
rec_z = 1.0 / z;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if 1
|
|
// note the unrolling loop is broken. It is never called, and uses big endian. -- FH
|
|
static void c_tmap_scanline_per()
|
|
{
|
|
uint c;
|
|
int x, j, index = fx_xleft + (bytes_per_row * fx_y);
|
|
fix l,u,v,z;
|
|
fix dudx, dvdx, dzdx, dldx;
|
|
|
|
u = fx_u;
|
|
v = fx_v*64;
|
|
z = fx_z;
|
|
dudx = fx_du_dx;
|
|
dvdx = fx_dv_dx*64;
|
|
dzdx = fx_dz_dx;
|
|
|
|
l = fx_l>>8;
|
|
dldx = fx_dl_dx/256;
|
|
auto dest = &write_buffer[fx_xleft + (bytes_per_row * fx_y)];
|
|
|
|
if (!Transparency_on) {
|
|
const auto pixPtrLocalCopy = pixptr;
|
|
auto &fadeTableLocalCopy = gr_fade_table;
|
|
unsigned long destlong;
|
|
|
|
x = fx_xright-fx_xleft+1; // x = number of pixels in scanline
|
|
|
|
if ((j = reinterpret_cast<uintptr_t>(dest) & 3) != 0)
|
|
{
|
|
j = 4 - j;
|
|
|
|
if (j > x)
|
|
j = x;
|
|
|
|
while (j > 0)
|
|
{
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
*dest++ = fadeTableLocalCopy[(l>>8)&0x7f][static_cast<uint32_t>(pixPtrLocalCopy[ ( (v/z)&(64*63) ) + ((u/z)&63) ]) ];
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
x--;
|
|
j--;
|
|
}
|
|
}
|
|
|
|
j &= ~3;
|
|
while (j > 0)
|
|
{
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
destlong = fadeTableLocalCopy[(l>>8)&0x7f][pixPtrLocalCopy[ ( (v/z)&(64*63) ) + ((u/z)&63) ] ] << 24;
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
destlong |= fadeTableLocalCopy[(l>>8)&0x7f][pixPtrLocalCopy[ ( (v/z)&(64*63) ) + ((u/z)&63) ] ] << 16;
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
destlong |= fadeTableLocalCopy[(l>>8)&0x7f][pixPtrLocalCopy[ ( (v/z)&(64*63) ) + ((u/z)&63) ] ] << 8;
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
destlong |= fadeTableLocalCopy[(l>>8)&0x7f][pixPtrLocalCopy[ ( (v/z)&(64*63) ) + ((u/z)&63) ] ];
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
*reinterpret_cast<unsigned long *>(dest) = destlong;
|
|
dest += 4;
|
|
x -= 4;
|
|
j -= 4;
|
|
index += 4;
|
|
if (index+4 >= SWIDTH*SHEIGHT) return;
|
|
}
|
|
|
|
while (x-- > 0)
|
|
{
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
*dest++ = fadeTableLocalCopy[(l>>8)&0x7f][pixPtrLocalCopy[ ( (v/z)&(64*63) ) + ((u/z)&63) ] ];
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
}
|
|
|
|
} else {
|
|
for (x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
c = static_cast<uint32_t>(pixptr[ ( (v/z)&(64*63) ) + ((u/z)&63) ]);
|
|
if ( c!=TRANSPARENCY_COLOR)
|
|
*dest = gr_fade_table[(l >> 8) &0x7f][c ];
|
|
dest++;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
}
|
|
}
|
|
}
|
|
|
|
#else
|
|
void c_tmap_scanline_per()
|
|
{
|
|
uint8_t *dest;
|
|
uint c;
|
|
fix u,v,z,l,dudx, dvdx, dzdx, dldx;
|
|
|
|
u = fx_u;
|
|
v = fx_v*64;
|
|
z = fx_z;
|
|
dudx = fx_du_dx;
|
|
dvdx = fx_dv_dx*64;
|
|
dzdx = fx_dz_dx;
|
|
|
|
l = fx_l>>8;
|
|
dldx = fx_dl_dx/256;
|
|
dest = reinterpret_cast<uint8_t *>(write_buffer + fx_xleft + (bytes_per_row * fx_y) );
|
|
|
|
if (!Transparency_on) {
|
|
for (int x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
*dest++ = gr_fade_table[ (l&(0x7f00)) + static_cast<uint32_t>(pixptr[ ( (v/z)&(64*63) ) + ((u/z)&63) ]) ];
|
|
//end edit -MM
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
}
|
|
} else {
|
|
for (int x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
c = static_cast<uint32_t>(pixptr[ ( (v/z)&(64*63) ) + ((u/z)&63) ]);
|
|
if ( c!=255)
|
|
//edited 05/18/99 Matt Mueller - changed from 0xff00 to 0x7f00 to fix glitches
|
|
*dest = gr_fade_table[ (l&(0x7f00)) + c ];
|
|
//end edit -MM
|
|
dest++;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
z += dzdx;
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
static void c_tmap_scanline_quad()
|
|
{
|
|
uint c;
|
|
int x, index = fx_xleft + (bytes_per_row * fx_y);
|
|
fix u,v,l,dudx, dvdx, dldx;
|
|
|
|
// Quadratic setup stuff:
|
|
fix a1, a2, b1, b2, dudx1, dvdx1;
|
|
fix u0 = fx_u;
|
|
fix u2 = fx_u + fx_du_dx*(fx_xright-fx_xleft+1); // This just needs to be uright from outer loop
|
|
fix v0 = fx_v;
|
|
fix v2 = fx_v + fx_dv_dx*(fx_xright-fx_xleft+1); // This just needs to be vright from outer loop
|
|
fix w0 = fx_z;
|
|
fix w2 = fx_z + fx_dz_dx*(fx_xright-fx_xleft+1); // This just needs to be zright from outer loop
|
|
fix u1 = fixdiv((u0+u2),(w0+w2));
|
|
fix v1 = fixdiv((v0+v2),(w0+w2));
|
|
int dx = fx_xright-fx_xleft+1;
|
|
u0 = fixdiv( u0, w0 ); // Divide Z out. This should be in outer loop
|
|
v0 = fixdiv( v0, w0 ); // Divide Z out. This should be in outer loop
|
|
u2 = fixdiv( u2, w2 ); // Divide Z out. This should be in outer loop
|
|
v2 = fixdiv( v2, w2 ); // Divide Z out. This should be in outer loop
|
|
a1 = (-3*u0+4*u1-u2)/dx;
|
|
b1 = (-3*v0+4*v1-v2)/dx;
|
|
a2 = (2*(u0-2*u1+u2))/(dx*dx);
|
|
b2 = (2*(v0-2*v1+v2))/(dx*dx);
|
|
dudx = a1 + a2;
|
|
dvdx = b1 + b2;
|
|
dudx1 = 2*a2;
|
|
dvdx1 = 2*b2;
|
|
u = u0;
|
|
v = v0;
|
|
|
|
// Normal lighting setup
|
|
l = fx_l>>8;
|
|
dldx = fx_dl_dx>>8;
|
|
|
|
// Normal destination pointer setup
|
|
auto dest = &write_buffer[fx_xleft + (bytes_per_row * fx_y)];
|
|
|
|
if (!Transparency_on) {
|
|
for (x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
*dest++ = gr_fade_table[(l>>8)&0xff][pixptr[ (f2i(v)&63)*64 + (f2i(u)&63) ] ];
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
dudx += dudx1; // Extra add for quadratic!
|
|
dvdx += dvdx1; // Extra add for quadratic!
|
|
}
|
|
} else {
|
|
for (x= fx_xright-fx_xleft+1 ; x > 0; --x ) {
|
|
if (++index >= SWIDTH*SHEIGHT) return;
|
|
c = static_cast<uint32_t>(pixptr[ (f2i(v)&63)*64 + (f2i(u)&63) ]);
|
|
if ( c!=255)
|
|
*dest = gr_fade_table[(l>>8)&0xff][c];
|
|
dest++;
|
|
l += dldx;
|
|
u += dudx;
|
|
v += dvdx;
|
|
dudx += dudx1; // Extra add for quadratic!
|
|
dvdx += dvdx1; // Extra add for quadratic!
|
|
}
|
|
}
|
|
}
|
|
|
|
//runtime selection of optimized tmappers. 12/07/99 Matthew Mueller
|
|
//the reason I did it this way rather than having a *tmap_funcs that then points to a c_tmap or fp_tmap struct thats already filled in, is to avoid a second pointer dereference.
|
|
void select_tmap(const std::string &type)
|
|
{
|
|
if (type == "fp")
|
|
{
|
|
cur_tmap_scanline_per=c_fp_tmap_scanline_per;
|
|
}
|
|
else if (type == "quad")
|
|
{
|
|
cur_tmap_scanline_per=c_tmap_scanline_quad;
|
|
}
|
|
else {
|
|
cur_tmap_scanline_per=c_tmap_scanline_per;
|
|
}
|
|
}
|
|
|
|
}
|