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ddd46c2ca3bb06a4598c0ae064bccdb760286dc7
processing4/core/PTriangle.java
benfry 19fd34a8d9 trying to clean up copyright info
2005-04-17 15:48:05 +00:00

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/* -*- mode: jde; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
Part of the Processing project - http://processing.org
Copyright (c) 2004-05 Ben Fry and Casey Reas
Copyright (c) 2001-04 Massachusetts Institute of Technology
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
*/
package processing.core;
/**
* Handles rendering of single (tesselated) triangles in 3D.
* <P>
* Written by sami www.sumea.com
*/
public class PTriangle implements PConstants
{
static final int R_GOURAUD = 0x1;
static final int R_TEXTURE8 = 0x2;
static final int R_TEXTURE24 = 0x4;
static final int R_TEXTURE32 = 0x8;
static final int R_ALPHA = 0x10;
private int[] m_pixels;
private int[] m_texture;
private int[] m_stencil;
private float[] m_zbuffer;
private int SCREEN_WIDTH;
private int SCREEN_HEIGHT;
private int SCREEN_WIDTH1;
private int SCREEN_HEIGHT1;
private int TEX_WIDTH;
private int TEX_HEIGHT;
private float F_TEX_WIDTH;
private float F_TEX_HEIGHT;
public boolean INTERPOLATE_UV;
public boolean INTERPOLATE_RGB;
public boolean INTERPOLATE_ALPHA;
// Vertex coordinates
private float[] x_array;
private float[] y_array;
private float[] z_array;
// U,V coordinates
private float[] u_array;
private float[] v_array;
// Vertex Intensity
private float[] r_array;
private float[] g_array;
private float[] b_array;
private float[] a_array;
// vertex offsets
private int o0;
private int o1;
private int o2;
/* rgb & a */
private float r0;
private float r1;
private float r2;
private float g0;
private float g1;
private float g2;
private float b0;
private float b1;
private float b2;
private float a0;
private float a1;
private float a2;
/* accurate texture uv coordinates */
private float u0;
private float u1;
private float u2;
private float v0;
private float v1;
private float v2;
/* deltas */
private float dx0;
private float dx1;
private float dx2;
private float dy0;
private float dy1;
private float dy2;
private float dz0;
private float dz1;
private float dz2;
/* texture deltas */
private float du0;
private float du1;
private float du2;
private float dv0;
private float dv1;
private float dv2;
/* rgba deltas */
private float dr0;
private float dr1;
private float dr2;
private float dg0;
private float dg1;
private float dg2;
private float db0;
private float db1;
private float db2;
private float da0;
private float da1;
private float da2;
/* */
private float uleft;
private float vleft;
private float uleftadd;
private float vleftadd;
/* polyedge positions & adds */
private float xleft;
private float xrght;
private float xadd1;
private float xadd2;
private float zleft;
private float zleftadd;
/* rgba positions & adds */
private float rleft;
private float gleft;
private float bleft;
private float aleft;
private float rleftadd;
private float gleftadd;
private float bleftadd;
private float aleftadd;
/* other somewhat useful variables :) */
private float dta;
private float dta2;
private float temp;
private float width;
/* integer poly UV adds */
private int iuadd;
private int ivadd;
private int iradd;
private int igadd;
private int ibadd;
private int iaadd;
private float izadd;
/* fill color */
private int m_fill;
/* draw flags */
public int m_drawFlags;
/* current poly number */
private int m_index;
/** */
private PGraphics3 parent;
/** */
private boolean m_culling;
/** */
private boolean m_singleRight;
/** */
private boolean m_bilinear;
public PTriangle(PGraphics3 g) {
//SCREEN_WIDTH = g.width;
//SCREEN_HEIGHT = g.height;
//SCREEN_WIDTH1 = SCREEN_WIDTH-1;
//SCREEN_HEIGHT1 = SCREEN_HEIGHT-1;
//m_pixels = g.pixels;
//m_stencil = g.stencil;
//m_zbuffer = g.zbuffer;
x_array = new float[3];
y_array = new float[3];
z_array = new float[3];
u_array = new float[3];
v_array = new float[3];
r_array = new float[3];
g_array = new float[3];
b_array = new float[3];
a_array = new float[3];
this.parent = g;
reset();
}
/**
* Resets polygon attributes
*/
public void reset() {
// reset these in case PGraphics was resized
SCREEN_WIDTH = parent.width;
SCREEN_HEIGHT = parent.height;
SCREEN_WIDTH1 = SCREEN_WIDTH-1;
SCREEN_HEIGHT1 = SCREEN_HEIGHT-1;
m_pixels = parent.pixels;
m_stencil = parent.stencil;
m_zbuffer = parent.zbuffer;
// other things to reset
INTERPOLATE_UV = false;
INTERPOLATE_RGB = false;
INTERPOLATE_ALPHA = false;
//m_tImage = null;
m_texture = null;
m_drawFlags = 0;
}
/**
* Sets backface culling on/off
*/
public void setCulling(boolean tf) {
m_culling = tf;
}
/**
* Sets vertex coordinates for the triangle
*/
public void setVertices(float x0, float y0, float z0,
float x1, float y1, float z1,
float x2, float y2, float z2) {
x_array[0] = x0;
x_array[1] = x1;
x_array[2] = x2;
y_array[0] = y0;
y_array[1] = y1;
y_array[2] = y2;
z_array[0] = z0;
z_array[1] = z1;
z_array[2] = z2;
}
/**
* Sets the UV coordinates of the texture
*/
public void setUV(float u0, float v0,
float u1, float v1,
float u2, float v2) {
// sets & scales uv texture coordinates to center of the pixel
u_array[0] = (u0 * F_TEX_WIDTH + 0.5f) * 65536f;
u_array[1] = (u1 * F_TEX_WIDTH + 0.5f) * 65536f;
u_array[2] = (u2 * F_TEX_WIDTH + 0.5f) * 65536f;
v_array[0] = (v0 * F_TEX_HEIGHT + 0.5f) * 65536f;
v_array[1] = (v1 * F_TEX_HEIGHT + 0.5f) * 65536f;
v_array[2] = (v2 * F_TEX_HEIGHT + 0.5f) * 65536f;
}
/**
* Sets vertex intensities in 0xRRGGBBAA format
*/
public void setIntensities( float r0, float g0, float b0, float a0,
float r1, float g1, float b1, float a1,
float r2, float g2, float b2, float a2) {
// Check if we need alpha or not?
if ((a0 != 1.0f) || (a1 != 1.0f) || (a2 != 1.0f)) {
INTERPOLATE_ALPHA = true;
a_array[0] = (a0 * 253f + 1.0f) * 65536f;
a_array[1] = (a1 * 253f + 1.0f) * 65536f;
a_array[2] = (a2 * 253f + 1.0f) * 65536f;
m_drawFlags|=R_ALPHA;
} else {
INTERPOLATE_ALPHA = false;
m_drawFlags&=~R_ALPHA;
}
// Check if we need to interpolate the intensity values
if ((r0 != r1) || (r1 != r2)) {
INTERPOLATE_RGB = true;
m_drawFlags|=R_GOURAUD;
} else if ((g0 != g1) || (g1 != g2)) {
INTERPOLATE_RGB = true;
m_drawFlags|=R_GOURAUD;
} else if ((b0 != b1) || (b1 != b2)) {
INTERPOLATE_RGB = true;
m_drawFlags|=R_GOURAUD;
} else {
//m_fill = parent.filli;
m_drawFlags&=~R_GOURAUD;
}
// push values to arrays.. some extra scaling is added
// to prevent possible color "overflood" due to rounding errors
r_array[0] = (r0 * 253f + 1.0f) * 65536f;
r_array[1] = (r1 * 253f + 1.0f) * 65536f;
r_array[2] = (r2 * 253f + 1.0f) * 65536f;
g_array[0] = (g0 * 253f + 1.0f) * 65536f;
g_array[1] = (g1 * 253f + 1.0f) * 65536f;
g_array[2] = (g2 * 253f + 1.0f) * 65536f;
b_array[0] = (b0 * 253f + 1.0f) * 65536f;
b_array[1] = (b1 * 253f + 1.0f) * 65536f;
b_array[2] = (b2 * 253f + 1.0f) * 65536f;
// for plain triangles
m_fill = ((int)(255*r0) << 16) | ((int)(255*g0) << 8) | (int)(255*b0);
}
/**
* Sets texture image used for the polygon
*/
public void setTexture(PImage image) {
//m_tImage = image;
m_texture = image.pixels;
TEX_WIDTH = image.width;
TEX_HEIGHT = image.height;
F_TEX_WIDTH = TEX_WIDTH-1;
F_TEX_HEIGHT = TEX_HEIGHT-1;
INTERPOLATE_UV = true;
if (image.format == ARGB) {
m_drawFlags|=R_TEXTURE32;
} else if (image.format == RGB) {
m_drawFlags|=R_TEXTURE24;
} else if (image.format == ALPHA) {
m_drawFlags|=R_TEXTURE8;
}
//if (parent.hints[SMOOTH_IMAGES]) {
if (parent.smooth) {
m_bilinear = true;
} else {
m_bilinear = false;
}
}
/**
*
*/
public void setUV(float[] u, float[] v) {
if (m_bilinear) {
// sets & scales uv texture coordinates to edges of pixels
u_array[0] = (u[0] * F_TEX_WIDTH) * 65500f;
u_array[1] = (u[1] * F_TEX_WIDTH) * 65500f;
u_array[2] = (u[2] * F_TEX_WIDTH) * 65500f;
v_array[0] = (v[0] * F_TEX_HEIGHT) * 65500f;
v_array[1] = (v[1] * F_TEX_HEIGHT) * 65500f;
v_array[2] = (v[2] * F_TEX_HEIGHT) * 65500f;
} else {
// sets & scales uv texture coordinates to center of the pixel
u_array[0] = (u[0] * TEX_WIDTH) * 65500f;
u_array[1] = (u[1] * TEX_WIDTH) * 65500f;
u_array[2] = (u[2] * TEX_WIDTH) * 65500f;
v_array[0] = (v[0] * TEX_HEIGHT) * 65500f;
v_array[1] = (v[1] * TEX_HEIGHT) * 65500f;
v_array[2] = (v[2] * TEX_HEIGHT) * 65500f;
}
}
public void setIndex(int index) {
m_index = index;
}
/**
* Renders the polygon
*/
public void render() {
// removed. done in PGraphics [rocha]
// increase polygon offset
//m_index = (m_index + 1) & 0xFFFFFFF;
// draw the polygon
draw();
// removed. replaced by external antialiasing [rocha]
// smooth edges?
//if (parent.smooth )
//{
// drawline_blender(x_array[0], y_array[0], x_array[1], y_array[1]);
// drawline_blender(x_array[1], y_array[1], x_array[2], y_array[2]);
// drawline_blender(x_array[2], y_array[2], x_array[0], y_array[0]);
//}
}
private void draw() {
// y-coordinates
float x0;
float x1;
float x2;
//
float z0;
float z1;
float z2;
//
float y0 = y_array[0];
float y1 = y_array[1];
float y2 = y_array[2];
// do backface culling?
if (m_culling) {
x0 = x_array[0];
if ((x_array[2]-x0)*(y1-y0) < (x_array[1]-x0)*(y2-y0))
return;
}
/* get vertex order from top -> down */
if (y0<y1) {
if (y2<y1) {
if (y2<y0) // 2,0,1
{
o0=2;
o1=0;
o2=1;
}
else // 0,2,1
{
o0=0;
o1=2;
o2=1;
}
}
else // 0,1,2
{
o0=0;
o1=1;
o2=2;
}
} else {
if (y2>y1) {
if (y2<y0) // 1,2,0
{
o0=1;
o1=2;
o2=0;
}
else // 1,0,2
{
o0=1;
o1=0;
o2=2;
}
}
else // 2,1,0
{
o0=2;
o1=1;
o2=0;
}
}
/**
* o0 = "top" vertex offset
* o1 = "mid" vertex offset
* o2 = "bot" vertex offset
*/
y0 = y_array[o0];
int yi0 = (int) (y0 + PIXEL_CENTER);
if (yi0 > SCREEN_HEIGHT) {
return;
} else if (yi0 < 0) {
yi0 = 0;
}
y2 = y_array[o2];
int yi2 = (int) (y2 + PIXEL_CENTER);
if (yi2 < 0) {
return;
} else if (yi2 > SCREEN_HEIGHT) {
yi2 = SCREEN_HEIGHT;
}
// Does the poly actually cross a scanline?
if (yi2 > yi0) {
x0 = x_array[o0];
x1 = x_array[o1];
x2 = x_array[o2];
// get mid Y and clip it
y1 = y_array[o1];
int yi1 = (int) (y1 + PIXEL_CENTER);
if (yi1 < 0)
yi1 = 0;
if (yi1 > SCREEN_HEIGHT)
yi1 = SCREEN_HEIGHT;
// calculate deltas etc.
dx2 = x2 - x0;
dy0 = y1 - y0;
dy2 = y2 - y0;
xadd2 = dx2 / dy2; // xadd for "single" edge
temp = dy0 / dy2;
width = temp * dx2 + x0 - x1;
// calculate alpha blend interpolation
if (INTERPOLATE_ALPHA) {
a0 = a_array[o0];
a1 = a_array[o1];
a2 = a_array[o2];
da0 = a1-a0;
da2 = a2-a0;
iaadd = (int) ((temp * da2 - da0) / width); // alpha add
}
// calculate intensity interpolation
if (INTERPOLATE_RGB) {
r0 = r_array[o0];
r1 = r_array[o1];
r2 = r_array[o2];
g0 = g_array[o0];
g1 = g_array[o1];
g2 = g_array[o2];
b0 = b_array[o0];
b1 = b_array[o1];
b2 = b_array[o2];
dr0 = r1-r0;
dg0 = g1-g0;
db0 = b1-b0;
dr2 = r2-r0;
dg2 = g2-g0;
db2 = b2-b0;
iradd = (int) ((temp * dr2 - dr0) / width); // r add
igadd = (int) ((temp * dg2 - dg0) / width); // g add
ibadd = (int) ((temp * db2 - db0) / width); // b add
}
// calculate UV interpolation
if (INTERPOLATE_UV) {
u0 = u_array[o0];
u1 = u_array[o1];
u2 = u_array[o2];
v0 = v_array[o0];
v1 = v_array[o1];
v2 = v_array[o2];
du0 = u1-u0;
dv0 = v1-v0;
du2 = u2-u0;
dv2 = v2-v0;
iuadd = (int) ((temp * du2 - du0) / width); // u add
ivadd = (int) ((temp * dv2 - dv0) / width); // v add
}
z0 = z_array[o0];
z1 = z_array[o1];
z2 = z_array[o2];
dz0 = z1-z0;
dz2 = z2-z0;
izadd = (temp * dz2 - dz0) / width;
// draw the upper poly segment if it's visible
if (yi1 > yi0) {
dta = (yi0 + PIXEL_CENTER) - y0;
xadd1 = (x1 - x0) / dy0;
// we can determine which side is "single" side by comparing left/right edge adds
if (xadd2 > xadd1) {
xleft = x0 + dta * xadd1;
xrght = x0 + dta * xadd2;
zleftadd = dz0 / dy0;
zleft = dta*zleftadd+z0;
//
if (INTERPOLATE_UV) {
uleftadd = du0 / dy0;
vleftadd = dv0 / dy0;
uleft = dta*uleftadd+u0;
vleft = dta*vleftadd+v0;
}
//
if (INTERPOLATE_RGB) {
rleftadd = dr0 / dy0;
gleftadd = dg0 / dy0;
bleftadd = db0 / dy0;
rleft = dta*rleftadd+r0;
gleft = dta*gleftadd+g0;
bleft = dta*bleftadd+b0;
}
//
if (INTERPOLATE_ALPHA) {
aleftadd = da0 / dy0;
aleft = dta*aleftadd+a0;
if (m_drawFlags == R_ALPHA) {
drawsegment_plain_alpha(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_ALPHA)) {
drawsegment_gouraud_alpha(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == (R_TEXTURE8 + R_ALPHA)) {
drawsegment_texture8_alpha(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == (R_TEXTURE24 + R_ALPHA)) {
drawsegment_texture24_alpha(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == (R_TEXTURE32 + R_ALPHA)) {
drawsegment_texture32_alpha(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE8 + R_ALPHA)) {
drawsegment_gouraud_texture8_alpha(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE24 + R_ALPHA)) {
drawsegment_gouraud_texture24_alpha(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE32 + R_ALPHA)) {
drawsegment_gouraud_texture32_alpha(xadd1,xadd2, yi0,yi1);
}
} else {
if (m_drawFlags == 0) {
drawsegment_plain(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == R_GOURAUD) {
drawsegment_gouraud(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == R_TEXTURE8) {
drawsegment_texture8(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == R_TEXTURE24) {
drawsegment_texture24(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == R_TEXTURE32) {
drawsegment_texture32(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE8)) {
drawsegment_gouraud_texture8(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE24)) {
drawsegment_gouraud_texture24(xadd1,xadd2, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE32)) {
drawsegment_gouraud_texture32(xadd1,xadd2, yi0,yi1);
}
}
m_singleRight = true;
} else {
xleft = x0 + dta * xadd2;
xrght = x0 + dta * xadd1;
zleftadd = dz2 / dy2;
zleft = dta*zleftadd+z0;
//
if (INTERPOLATE_UV) {
uleftadd = du2 / dy2;
vleftadd = dv2 / dy2;
uleft = dta*uleftadd+u0;
vleft = dta*vleftadd+v0;
}
//
if (INTERPOLATE_RGB) {
rleftadd = dr2 / dy2;
gleftadd = dg2 / dy2;
bleftadd = db2 / dy2;
rleft = dta*rleftadd+r0;
gleft = dta*gleftadd+g0;
bleft = dta*bleftadd+b0;
}
if (INTERPOLATE_ALPHA) {
aleftadd = da2 / dy2;
aleft = dta*aleftadd+a0;
if (m_drawFlags == R_ALPHA) {
drawsegment_plain_alpha(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_ALPHA)) {
drawsegment_gouraud_alpha(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == (R_TEXTURE8 + R_ALPHA)) {
drawsegment_texture8_alpha(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == (R_TEXTURE24 + R_ALPHA)) {
drawsegment_texture24_alpha(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == (R_TEXTURE32 + R_ALPHA)) {
drawsegment_texture32_alpha(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE8 + R_ALPHA)) {
drawsegment_gouraud_texture8_alpha(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE24 + R_ALPHA)) {
drawsegment_gouraud_texture24_alpha(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE32 + R_ALPHA)) {
drawsegment_gouraud_texture32_alpha(xadd2, xadd1, yi0,yi1);
}
} else {
if (m_drawFlags == 0) {
drawsegment_plain(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == R_GOURAUD) {
drawsegment_gouraud(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == R_TEXTURE8) {
drawsegment_texture8(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == R_TEXTURE24) {
drawsegment_texture24(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == R_TEXTURE32) {
drawsegment_texture32(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE8)) {
drawsegment_gouraud_texture8(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE24)) {
drawsegment_gouraud_texture24(xadd2, xadd1, yi0,yi1);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE32)) {
drawsegment_gouraud_texture32(xadd2, xadd1, yi0,yi1);
}
}
m_singleRight = false;
}
// if bottom segment height is zero, return
if (yi2 == yi1)
return;
// calculate xadd 1
dy1 = y2 - y1;
xadd1 = (x2 - x1) / dy1;
} else {
// top seg height was zero, calculate & clip single edge X
dy1 = y2 - y1;
xadd1 = (x2 - x1) / dy1;
// which edge is left?
if (xadd2 < xadd1) {
xrght = ((yi1 + PIXEL_CENTER) - y0) * xadd2 + x0;
m_singleRight = true;
} else {
dta = (yi1 + PIXEL_CENTER) - y0;
xleft = dta * xadd2 + x0;
zleftadd = dz2 / dy2;
zleft = dta * zleftadd + z0;
if (INTERPOLATE_UV) {
uleftadd = du2 / dy2;
vleftadd = dv2 / dy2;
uleft = dta * uleftadd + u0;
vleft = dta * vleftadd + v0;
}
if (INTERPOLATE_RGB) {
rleftadd = dr2 / dy2;
gleftadd = dg2 / dy2;
bleftadd = db2 / dy2;
rleft = dta * rleftadd + r0;
gleft = dta * gleftadd + g0;
bleft = dta * bleftadd + b0;
}
//
if (INTERPOLATE_ALPHA) {
aleftadd = da2 / dy2;
aleft = dta * aleftadd + a0;
}
m_singleRight = false;
}
}
// draw the lower segment
if (m_singleRight) {
dta = (yi1 + PIXEL_CENTER) - y1;
xleft = dta * xadd1 + x1;
zleftadd = (z2 - z1) / dy1;
zleft = dta * zleftadd + z1;
if (INTERPOLATE_UV) {
uleftadd = (u2 - u1) / dy1;
vleftadd = (v2 - v1) / dy1;
uleft = dta * uleftadd + u1;
vleft = dta * vleftadd + v1;
}
if (INTERPOLATE_RGB) {
rleftadd = (r2 - r1) / dy1;
gleftadd = (g2 - g1) / dy1;
bleftadd = (b2 - b1) / dy1;
rleft = dta * rleftadd + r1;
gleft = dta * gleftadd + g1;
bleft = dta * bleftadd + b1;
}
if (INTERPOLATE_ALPHA) {
aleftadd = (a2 - a1) / dy1;
aleft = dta * aleftadd + a1;
if (m_drawFlags == R_ALPHA) {
drawsegment_plain_alpha(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_ALPHA)) {
drawsegment_gouraud_alpha(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == (R_TEXTURE8 + R_ALPHA)) {
drawsegment_texture8_alpha(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == (R_TEXTURE24 + R_ALPHA)) {
drawsegment_texture24_alpha(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == (R_TEXTURE32 + R_ALPHA)) {
drawsegment_texture32_alpha(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE8 + R_ALPHA)) {
drawsegment_gouraud_texture8_alpha(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE24 + R_ALPHA)) {
drawsegment_gouraud_texture24_alpha(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE32 + R_ALPHA)) {
drawsegment_gouraud_texture32_alpha(xadd1, xadd2, yi1,yi2);
}
} else {
if (m_drawFlags == 0) {
drawsegment_plain(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == R_GOURAUD) {
drawsegment_gouraud(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == R_TEXTURE8) {
drawsegment_texture8(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == R_TEXTURE24) {
drawsegment_texture24(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == R_TEXTURE32) {
drawsegment_texture32(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE8)) {
drawsegment_gouraud_texture8(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE24)) {
drawsegment_gouraud_texture24(xadd1, xadd2, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE32)) {
drawsegment_gouraud_texture32(xadd1, xadd2, yi1,yi2);
}
}
} else {
xrght = ((yi1 + PIXEL_CENTER)- y1) * xadd1 + x1;
if (INTERPOLATE_ALPHA) {
if (m_drawFlags == R_ALPHA) {
drawsegment_plain_alpha(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_ALPHA)) {
drawsegment_gouraud_alpha(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == (R_TEXTURE8 + R_ALPHA)) {
drawsegment_texture8_alpha(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == (R_TEXTURE24 + R_ALPHA)) {
drawsegment_texture24_alpha(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == (R_TEXTURE32 + R_ALPHA)) {
drawsegment_texture32_alpha(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE8 + R_ALPHA)) {
drawsegment_gouraud_texture8_alpha(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE24 + R_ALPHA)) {
drawsegment_gouraud_texture24_alpha(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE32 + R_ALPHA)) {
drawsegment_gouraud_texture32_alpha(xadd2, xadd1, yi1,yi2);
}
} else {
if (m_drawFlags == 0) {
drawsegment_plain(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == R_GOURAUD) {
drawsegment_gouraud(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == R_TEXTURE8) {
drawsegment_texture8(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == R_TEXTURE24) {
drawsegment_texture24(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == R_TEXTURE32) {
drawsegment_texture32(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE8)) {
drawsegment_gouraud_texture8(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE24)) {
drawsegment_gouraud_texture24(xadd2, xadd1, yi1,yi2);
} else if (m_drawFlags == (R_GOURAUD + R_TEXTURE32)) {
drawsegment_gouraud_texture32(xadd2, xadd1, yi1,yi2);
}
}
}
}
}
/**
* Plain color
*/
private void drawsegment_plain
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int f = m_fill;
int p = m_index;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
if (iz <= m_zbuffer[xstart]) {
m_zbuffer[xstart] = iz;
m_pixels[xstart] = f;
m_stencil[xstart] = p;
}
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
zleft+=zleftadd;
}
}
/**
* Plain color, interpolated alpha
*/
private void drawsegment_plain_alpha
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int pr = m_fill & 0xFF0000;
int pg = m_fill & 0xFF00;
int pb = m_fill & 0xFF;
int p = m_index;
float iaf = iaadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
float iz = izadd * xdiff + zleft;
int ia = (int) (iaf * xdiff + aleft);
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
if (iz <= m_zbuffer[xstart]) {
//m_zbuffer[xstart] = iz;
int alpha = ia >> 16;
int mr0 = m_pixels[xstart];
int mg0 = mr0 & 0xFF00;
int mb0 = mr0 & 0xFF;
mr0 &= 0xFF0000;
mr0 = mr0 + (((pr - mr0) * alpha) >> 8);
mg0 = mg0 + (((pg - mg0) * alpha) >> 8);
mb0 = mb0 + (((pb - mb0) * alpha) >> 8);
m_pixels[xstart] = (mr0 & 0xFF0000) | (mg0 & 0xFF00) | (mb0 & 0xFF);
m_stencil[xstart] = p;
}
iz += izadd;
ia += iaadd;
}
ytop += SCREEN_WIDTH;
xleft += leftadd;
xrght += rghtadd;
zleft += zleftadd;
}
}
/**
* RGB gouraud
*/
private void drawsegment_gouraud
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
float irf = iradd;
float igf = igadd;
float ibf = ibadd;
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int ir = (int) (irf * xdiff + rleft);
int ig = (int) (igf * xdiff + gleft);
int ib = (int) (ibf * xdiff + bleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
if (iz <= m_zbuffer[xstart]) {
m_zbuffer[xstart] = iz;
m_pixels[xstart]=((ir & 0xFF0000) | ((ig >> 8) & 0xFF00) | (ib >> 16));
m_stencil[xstart] = p;
}
//
ir+=iradd;
ig+=igadd;
ib+=ibadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
rleft+=rleftadd;
gleft+=gleftadd;
bleft+=bleftadd;
zleft+=zleftadd;
}
}
/**
* RGB gouraud + interpolated alpha
*/
private void drawsegment_gouraud_alpha
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float irf = iradd;
float igf = igadd;
float ibf = ibadd;
float iaf = iaadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int ir = (int) (irf * xdiff + rleft);
int ig = (int) (igf * xdiff + gleft);
int ib = (int) (ibf * xdiff + bleft);
int ia = (int) (iaf * xdiff + aleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
if (iz <= m_zbuffer[xstart]) {
//m_zbuffer[xstart] = iz;
//
int red = (ir & 0xFF0000);
int grn = (ig >> 8) & 0xFF00;
int blu = (ib >> 16);
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
// blend alpha
int al = ia >> 16;
//
m_pixels[xstart] = ((br + (((red - br) * al) >> 8)) & 0xFF0000) | ((bg + (((grn - bg) * al) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al) >> 8)) & 0xFF);
m_stencil[xstart] = p;
}
//
ir+=iradd;
ig+=igadd;
ib+=ibadd;
ia+=iaadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
rleft+=rleftadd;
gleft+=gleftadd;
bleft+=bleftadd;
aleft+=aleftadd;
zleft+=zleftadd;
}
}
/**
* 8-bit alpha texture
*/
private void drawsegment_texture8
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
int red = m_fill & 0xFF0000;
int grn = m_fill & 0xFF00;
int blu = m_fill & 0xFF;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
// try-catch just in case pixel offset it out of range
try
{
if (iz <= m_zbuffer[xstart]) {
//m_zbuffer[xstart] = iz;
int al0;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = iu & 0xFFFF;
al0 = m_texture[ofs] & 0xFF;
int al1 = m_texture[ofs + 1] & 0xFF;
ofs+=TEX_WIDTH;
int al2 = m_texture[ofs] & 0xFF;
int al3 = m_texture[ofs + 1] & 0xFF;
al0 = al0 + (((al1-al0) * iui) >> 16);
al2 = al2 + (((al3-al2) * iui) >> 16);
al0 = al0 + (((al2-al0) * (iv & 0xFFFF)) >> 16);
} else {
al0 = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)] & 0xFF;
}
int br = m_pixels[xstart];
int bg = (br & 0xFF00);
int bb = (br & 0xFF);
br = (br & 0xFF0000);
m_pixels[xstart] = ((br + (((red - br) * al0) >> 8)) & 0xFF0000) | ((bg + (((grn - bg) * al0) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al0) >> 8)) & 0xFF);
m_stencil[xstart] = p;
}
}
catch (Exception e) {
}
iu+=iuadd;
iv+=ivadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
zleft+=zleftadd;
}
}
/**
* 8-bit texutre + alpha
*/
private void drawsegment_texture8_alpha
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
float iaf = iaadd;
int red = m_fill & 0xFF0000;
int grn = m_fill & 0xFF00;
int blu = m_fill & 0xFF;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
int ia = (int) (iaf * xdiff + aleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
// try-catch just in case pixel offset it out of range
try
{
if (iz <= m_zbuffer[xstart]) {
//m_zbuffer[xstart] = iz;
int al0;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = iu & 0xFFFF;
al0 = m_texture[ofs] & 0xFF;
int al1 = m_texture[ofs + 1] & 0xFF;
ofs+=TEX_WIDTH;
int al2 = m_texture[ofs] & 0xFF;
int al3 = m_texture[ofs + 1] & 0xFF;
al0 = al0 + (((al1-al0) * iui) >> 16);
al2 = al2 + (((al3-al2) * iui) >> 16);
al0 = al0 + (((al2-al0) * (iv & 0xFFFF)) >> 16);
} else {
al0 = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)] & 0xFF;
}
al0 = (al0 * (ia >> 16)) >> 8;
int br = m_pixels[xstart];
int bg = (br & 0xFF00);
int bb = (br & 0xFF);
br = (br & 0xFF0000);
m_pixels[xstart] = ((br + (((red - br) * al0) >> 8)) & 0xFF0000) | ((bg + (((grn - bg) * al0) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al0) >> 8)) & 0xFF);
m_stencil[xstart] = p;
}
}
catch (Exception e) {
}
iu+=iuadd;
iv+=ivadd;
iz+=izadd;
ia+=iaadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
zleft+=zleftadd;
aleft+=aleftadd;
}
}
/**
* Plain 24-bit texutre
*/
private void drawsegment_texture24
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
// try-catch just in case pixel offset it out of range
try
{
if (iz <= m_zbuffer[xstart]) {
m_zbuffer[xstart] = iz;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = (iu & 0xFFFF) >> 9;
int ivi = (iv & 0xFFFF) >> 9;
// get texture pixels
int pix0 = m_texture[ofs];
int pix1 = m_texture[ofs + 1];
ofs+=TEX_WIDTH;
int pix2 = m_texture[ofs];
int pix3 = m_texture[ofs + 1];
// red
int red0 = (pix0 & 0xFF0000);
int red2 = (pix2 & 0xFF0000);
int up = red0 + ((((pix1 & 0xFF0000) - red0) * iui) >> 7);
int dn = red2 + ((((pix3 & 0xFF0000) - red2) * iui) >> 7);
int red = up + (((dn-up) * ivi) >> 7);
// grn
red0 = (pix0 & 0xFF00);
red2 = (pix2 & 0xFF00);
up = red0 + ((((pix1 & 0xFF00) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF00) - red2) * iui) >> 7);
int grn = up + (((dn-up) * ivi) >> 7);
// blu
red0 = (pix0 & 0xFF);
red2 = (pix2 & 0xFF);
up = red0 + ((((pix1 & 0xFF) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF) - red2) * iui) >> 7);
int blu = up + (((dn-up) * ivi) >> 7);
//
m_pixels[xstart] = (red & 0xFF0000) | (grn & 0xFF00) | (blu & 0xFF);
} else {
m_pixels[xstart] = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)];
}
m_stencil[xstart] = p;
}
}
catch (Exception e) {
}
iu+=iuadd;
iv+=ivadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
zleft+=zleftadd;
}
}
/**
* Alpha 24-bit texutre
*/
private void drawsegment_texture24_alpha
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
float iaf = iaadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
int ia = (int) (iaf * xdiff + aleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
// try-catch just in case pixel offset it out of range
try
{
if (iz <= m_zbuffer[xstart]) {
//m_zbuffer[xstart] = iz;
// get alpha
int al = ia >> 16;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = (iu & 0xFFFF) >> 9;
int ivi = (iv & 0xFFFF) >> 9;
// get texture pixels
int pix0 = m_texture[ofs];
int pix1 = m_texture[ofs + 1];
ofs+=TEX_WIDTH;
int pix2 = m_texture[ofs];
int pix3 = m_texture[ofs + 1];
// red
int red0 = (pix0 & 0xFF0000);
int red2 = (pix2 & 0xFF0000);
int up = red0 + ((((pix1 & 0xFF0000) - red0) * iui) >> 7);
int dn = red2 + ((((pix3 & 0xFF0000) - red2) * iui) >> 7);
int red = up + (((dn-up) * ivi) >> 7);
// grn
red0 = (pix0 & 0xFF00);
red2 = (pix2 & 0xFF00);
up = red0 + ((((pix1 & 0xFF00) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF00) - red2) * iui) >> 7);
int grn = up + (((dn-up) * ivi) >> 7);
// blu
red0 = (pix0 & 0xFF);
red2 = (pix2 & 0xFF);
up = red0 + ((((pix1 & 0xFF) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF) - red2) * iui) >> 7);
int blu = up + (((dn-up) * ivi) >> 7);
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
m_pixels[xstart] = ((br + (((red - br) * al) >> 8)) & 0xFF0000) |( (bg + (((grn - bg) * al) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al) >> 8)) & 0xFF);
} else {
int red = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)];
int grn = red & 0xFF00;
int blu = red & 0xFF;
red&=0xFF0000;
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
m_pixels[xstart] = ((br + (((red - br) * al) >> 8)) & 0xFF0000) |((bg + (((grn - bg) * al) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al) >> 8)) & 0xFF);
}
m_stencil[xstart] = p;
}
}
catch (Exception e) {
}
iu+=iuadd;
iv+=ivadd;
ia+=iaadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
zleft+=zleftadd;
aleft+=aleftadd;
}
}
/**
* Plain 32-bit texutre
*/
private void drawsegment_texture32
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
// try-catch just in case pixel offset it out of range
try
{
if (iz <= m_zbuffer[xstart]) {
//m_zbuffer[xstart] = iz;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = (iu & 0xFFFF) >> 9;
int ivi = (iv & 0xFFFF) >> 9;
// get texture pixels
int pix0 = m_texture[ofs];
int pix1 = m_texture[ofs + 1];
ofs+=TEX_WIDTH;
int pix2 = m_texture[ofs];
int pix3 = m_texture[ofs + 1];
// red
int red0 = (pix0 & 0xFF0000);
int red2 = (pix2 & 0xFF0000);
int up = red0 + ((((pix1 & 0xFF0000) - red0) * iui) >> 7);
int dn = red2 + ((((pix3 & 0xFF0000) - red2) * iui) >> 7);
int red = up + (((dn-up) * ivi) >> 7);
// grn
red0 = (pix0 & 0xFF00);
red2 = (pix2 & 0xFF00);
up = red0 + ((((pix1 & 0xFF00) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF00) - red2) * iui) >> 7);
int grn = up + (((dn-up) * ivi) >> 7);
// blu
red0 = (pix0 & 0xFF);
red2 = (pix2 & 0xFF);
up = red0 + ((((pix1 & 0xFF) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF) - red2) * iui) >> 7);
int blu = up + (((dn-up) * ivi) >> 7);
// alpha
pix0>>>=24;
pix2>>>=24;
up = pix0 + ((((pix1 >>> 24) - pix0) * iui) >> 7);
dn = pix2 + ((((pix3 >>> 24) - pix2) * iui) >> 7);
int al = up + (((dn-up) * ivi) >> 7);
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
m_pixels[xstart] = ((br + (((red - br) * al) >> 8)) & 0xFF0000) |((bg + (((grn - bg) * al) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al) >> 8)) & 0xFF);
} else {
int red = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)];
int al = red >>> 24;
int grn = red & 0xFF00;
int blu = red & 0xFF;
red&=0xFF0000;
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
m_pixels[xstart] = ((br + (((red - br) * al) >> 8)) & 0xFF0000) |((bg + (((grn - bg) * al) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al) >> 8)) & 0xFF);
}
m_stencil[xstart] = p;
}
}
catch (Exception e) {
}
iu+=iuadd;
iv+=ivadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
zleft+=zleftadd;
aleft+=aleftadd;
}
}
/**
* Alpha 24-bit texutre
*/
private void drawsegment_texture32_alpha
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
float iaf = iaadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
int ia = (int) (iaf * xdiff + aleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
// try-catch just in case pixel offset it out of range
try
{
if (iz <= m_zbuffer[xstart]) {
//m_zbuffer[xstart] = iz;
// get alpha
int al = ia >> 16;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = (iu & 0xFFFF) >> 9;
int ivi = (iv & 0xFFFF) >> 9;
// get texture pixels
int pix0 = m_texture[ofs];
int pix1 = m_texture[ofs + 1];
ofs+=TEX_WIDTH;
int pix2 = m_texture[ofs];
int pix3 = m_texture[ofs + 1];
// red
int red0 = (pix0 & 0xFF0000);
int red2 = (pix2 & 0xFF0000);
int up = red0 + ((((pix1 & 0xFF0000) - red0) * iui) >> 7);
int dn = red2 + ((((pix3 & 0xFF0000) - red2) * iui) >> 7);
int red = up + (((dn-up) * ivi) >> 7);
// grn
red0 = (pix0 & 0xFF00);
red2 = (pix2 & 0xFF00);
up = red0 + ((((pix1 & 0xFF00) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF00) - red2) * iui) >> 7);
int grn = up + (((dn-up) * ivi) >> 7);
// blu
red0 = (pix0 & 0xFF);
red2 = (pix2 & 0xFF);
up = red0 + ((((pix1 & 0xFF) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF) - red2) * iui) >> 7);
int blu = up + (((dn-up) * ivi) >> 7);
// alpha
pix0>>>=24;
pix2>>>=24;
up = pix0 + ((((pix1 >>> 24) - pix0) * iui) >> 7);
dn = pix2 + ((((pix3 >>> 24) - pix2) * iui) >> 7);
al = al * (up + (((dn-up) * ivi) >> 7)) >> 8;
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
m_pixels[xstart] = ((br + (((red - br) * al) >> 8)) & 0xFF0000) |((bg + (((grn - bg) * al) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al) >> 8)) & 0xFF);
} else {
int red = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)];
al = al * (red >>> 24) >> 8;
int grn = red & 0xFF00;
int blu = red & 0xFF;
red&=0xFF0000;
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
m_pixels[xstart] = ((br + (((red - br) * al) >> 8)) & 0xFF0000) |((bg + (((grn - bg) * al) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al) >> 8)) & 0xFF);
}
m_stencil[xstart] = p;
}
}
catch (Exception e) {
}
iu+=iuadd;
iv+=ivadd;
ia+=iaadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
zleft+=zleftadd;
aleft+=aleftadd;
}
}
/**
* Gouraud blended with 8-bit alpha texture
*/
private void drawsegment_gouraud_texture8
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
float irf = iradd;
float igf = igadd;
float ibf = ibadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
int ir = (int) (irf * xdiff + rleft);
int ig = (int) (igf * xdiff + gleft);
int ib = (int) (ibf * xdiff + bleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
try
{
if (iz <= m_zbuffer[xstart]) {
//m_zbuffer[xstart] = iz;
int al0;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = iu & 0xFFFF;
al0 = m_texture[ofs] & 0xFF;
int al1 = m_texture[ofs + 1] & 0xFF;
ofs+=TEX_WIDTH;
int al2 = m_texture[ofs] & 0xFF;
int al3 = m_texture[ofs + 1] & 0xFF;
al0 = al0 + (((al1-al0) * iui) >> 16);
al2 = al2 + (((al3-al2) * iui) >> 16);
al0 = al0 + (((al2-al0) * (iv & 0xFFFF)) >> 16);
} else {
al0 = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)] & 0xFF;
}
// get RGB colors
int red = ir & 0xFF0000;
int grn = (ig >> 8) & 0xFF00;
int blu = (ib >> 16);
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
m_pixels[xstart] = ((br + (((red - br) * al0) >> 8)) & 0xFF0000) |((bg + (((grn - bg) * al0) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al0) >> 8)) & 0xFF);
// write stencil
m_stencil[xstart] = p;
}
}
catch (Exception e) {
}
//
iu+=iuadd;
iv+=ivadd;
ir+=iradd;
ig+=igadd;
ib+=ibadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
rleft+=rleftadd;
gleft+=gleftadd;
bleft+=bleftadd;
zleft+=zleftadd;
}
}
/**
* Texture multiplied with gouraud
*/
private void drawsegment_gouraud_texture8_alpha
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
float irf = iradd;
float igf = igadd;
float ibf = ibadd;
float iaf = iaadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
int ir = (int) (irf * xdiff + rleft);
int ig = (int) (igf * xdiff + gleft);
int ib = (int) (ibf * xdiff + bleft);
int ia = (int) (iaf * xdiff + aleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
try
{
if (iz <= m_zbuffer[xstart]) {
//m_zbuffer[xstart] = iz;
int al0;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = iu & 0xFFFF;
al0 = m_texture[ofs] & 0xFF;
int al1 = m_texture[ofs + 1] & 0xFF;
ofs+=TEX_WIDTH;
int al2 = m_texture[ofs] & 0xFF;
int al3 = m_texture[ofs + 1] & 0xFF;
al0 = al0 + (((al1-al0) * iui) >> 16);
al2 = al2 + (((al3-al2) * iui) >> 16);
al0 = al0 + (((al2-al0) * (iv & 0xFFFF)) >> 16);
} else {
al0 = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)] & 0xFF;
}
al0 = (al0 * (ia >> 16)) >> 8;
// get RGB colors
int red = ir & 0xFF0000;
int grn = (ig >> 8) & 0xFF00;
int blu = (ib >> 16);
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
m_pixels[xstart] = ((br + (((red - br) * al0) >> 8)) & 0xFF0000) |((bg + (((grn - bg) * al0) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al0) >> 8)) & 0xFF);
// write stencil
m_stencil[xstart] = p;
}
}
catch (Exception e) {
}
//
iu+=iuadd;
iv+=ivadd;
ir+=iradd;
ig+=igadd;
ib+=ibadd;
ia+=iaadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
rleft+=rleftadd;
gleft+=gleftadd;
bleft+=bleftadd;
aleft+=aleftadd;
zleft+=zleftadd;
}
}
/**
* Texture multiplied with gouraud
*/
private void drawsegment_gouraud_texture24
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
float irf = iradd;
float igf = igadd;
float ibf = ibadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
int ir = (int) (irf * xdiff + rleft);
int ig = (int) (igf * xdiff + gleft);
int ib = (int) (ibf * xdiff + bleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
try
{
if (iz <= m_zbuffer[xstart]) {
m_zbuffer[xstart] = iz;
int red;
int grn;
int blu;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = (iu & 0xFFFF) >> 9;
int ivi = (iv & 0xFFFF) >> 9;
// get texture pixels
int pix0 = m_texture[ofs];
int pix1 = m_texture[ofs + 1];
ofs+=TEX_WIDTH;
int pix2 = m_texture[ofs];
int pix3 = m_texture[ofs + 1];
// red
int red0 = (pix0 & 0xFF0000);
int red2 = (pix2 & 0xFF0000);
int up = red0 + ((((pix1 & 0xFF0000) - red0) * iui) >> 7);
int dn = red2 + ((((pix3 & 0xFF0000) - red2) * iui) >> 7);
red = up + (((dn-up) * ivi) >> 7);
// grn
red0 = (pix0 & 0xFF00);
red2 = (pix2 & 0xFF00);
up = red0 + ((((pix1 & 0xFF00) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF00) - red2) * iui) >> 7);
grn = up + (((dn-up) * ivi) >> 7);
// blu
red0 = (pix0 & 0xFF);
red2 = (pix2 & 0xFF);
up = red0 + ((((pix1 & 0xFF) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF) - red2) * iui) >> 7);
blu = up + (((dn-up) * ivi) >> 7);
} else {
// get texture pixel color
blu = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)];
red = (blu & 0xFF0000);
grn = (blu & 0xFF00);
blu = blu & 0xFF;
}
//
int r = (ir >> 16);
int g = (ig >> 16);
int b = (ib >> 16);
//
m_pixels[xstart] = ( ((red * r) & 0xFF000000) | ((grn * g) & 0xFF0000) | (blu * b) ) >> 8;
m_stencil[xstart] = p;
}
}
catch (Exception e) {
}
//
iu+=iuadd;
iv+=ivadd;
ir+=iradd;
ig+=igadd;
ib+=ibadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
rleft+=rleftadd;
gleft+=gleftadd;
bleft+=bleftadd;
zleft+=zleftadd;
}
}
/**
* Gouraud*texture blended with interpolating alpha
*/
private void drawsegment_gouraud_texture24_alpha
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
float irf = iradd;
float igf = igadd;
float ibf = ibadd;
float iaf = iaadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
int ir = (int) (irf * xdiff + rleft);
int ig = (int) (igf * xdiff + gleft);
int ib = (int) (ibf * xdiff + bleft);
int ia = (int) (iaf * xdiff + aleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ;xstart < xend; xstart++ ) {
// get texture pixel color
try
{
//if (iz < m_zbuffer[xstart]) {
if (iz <= m_zbuffer[xstart]) { // [fry 041114]
//m_zbuffer[xstart] = iz;
// blend
int al = ia >> 16;
int red;
int grn;
int blu;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = (iu & 0xFFFF) >> 9;
int ivi = (iv & 0xFFFF) >> 9;
// get texture pixels
int pix0 = m_texture[ofs];
int pix1 = m_texture[ofs + 1];
ofs+=TEX_WIDTH;
int pix2 = m_texture[ofs];
int pix3 = m_texture[ofs + 1];
// red
int red0 = (pix0 & 0xFF0000);
int red2 = (pix2 & 0xFF0000);
int up = red0 + ((((pix1 & 0xFF0000) - red0) * iui) >> 7);
int dn = red2 + ((((pix3 & 0xFF0000) - red2) * iui) >> 7);
red = (up + (((dn-up) * ivi) >> 7)) >> 16;
// grn
red0 = (pix0 & 0xFF00);
red2 = (pix2 & 0xFF00);
up = red0 + ((((pix1 & 0xFF00) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF00) - red2) * iui) >> 7);
grn = (up + (((dn-up) * ivi) >> 7)) >> 8;
// blu
red0 = (pix0 & 0xFF);
red2 = (pix2 & 0xFF);
up = red0 + ((((pix1 & 0xFF) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF) - red2) * iui) >> 7);
blu = up + (((dn-up) * ivi) >> 7);
} else {
blu = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)];
red = (blu & 0xFF0000) >> 16; // 0 - 255
grn = (blu & 0xFF00) >> 8; // 0 - 255
blu = (blu & 0xFF); // 0 - 255
}
// multiply with gouraud color
red = (red * ir) >>> 8; // 0x00FF????
grn = (grn * ig) >>> 16; // 0x0000FF??
blu = (blu * ib) >>> 24; // 0x000000FF
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
//
m_pixels[xstart] = ((br + (((red - br) * al) >> 8)) & 0xFF0000) |((bg + (((grn - bg) * al) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al) >> 8)) & 0xFF);
m_stencil[xstart] = p;
}
}
catch (Exception e) {
}
//
iu+=iuadd;
iv+=ivadd;
ir+=iradd;
ig+=igadd;
ib+=ibadd;
ia+=iaadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
rleft+=rleftadd;
gleft+=gleftadd;
bleft+=bleftadd;
aleft+=aleftadd;
zleft+=zleftadd;
}
}
/**
* Gouraud*texture blended with interpolating alpha
*/
private void drawsegment_gouraud_texture32
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
float irf = iradd;
float igf = igadd;
float ibf = ibadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
int ir = (int) (irf * xdiff + rleft);
int ig = (int) (igf * xdiff + gleft);
int ib = (int) (ibf * xdiff + bleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ; xstart < xend; xstart++ ) {
try
{
if (iz <= m_zbuffer[xstart]) {
//m_zbuffer[xstart] = iz;
int red;
int grn;
int blu;
int al;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = (iu & 0xFFFF) >> 9;
int ivi = (iv & 0xFFFF) >> 9;
// get texture pixels
int pix0 = m_texture[ofs];
int pix1 = m_texture[ofs + 1];
ofs+=TEX_WIDTH;
int pix2 = m_texture[ofs];
int pix3 = m_texture[ofs + 1];
// red
int red0 = (pix0 & 0xFF0000);
int red2 = (pix2 & 0xFF0000);
int up = red0 + ((((pix1 & 0xFF0000) - red0) * iui) >> 7);
int dn = red2 + ((((pix3 & 0xFF0000) - red2) * iui) >> 7);
red = (up + (((dn-up) * ivi) >> 7)) >> 16;
// grn
red0 = (pix0 & 0xFF00);
red2 = (pix2 & 0xFF00);
up = red0 + ((((pix1 & 0xFF00) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF00) - red2) * iui) >> 7);
grn = (up + (((dn-up) * ivi) >> 7)) >> 8;
// blu
red0 = (pix0 & 0xFF);
red2 = (pix2 & 0xFF);
up = red0 + ((((pix1 & 0xFF) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF) - red2) * iui) >> 7);
blu = up + (((dn-up) * ivi) >> 7);
// alpha
pix0>>>=24;
pix2>>>=24;
up = pix0 + ((((pix1 >>> 24) - pix0) * iui) >> 7);
dn = pix2 + ((((pix3 >>> 24) - pix2) * iui) >> 7);
al = up + (((dn-up) * ivi) >> 7);
} else {
// get texture pixel color
blu = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)];
al = (blu >>> 24);
red = (blu & 0xFF0000) >> 16;
grn = (blu & 0xFF00) >> 8;
blu = blu & 0xFF;
}
// multiply with gouraud color
red = (red * ir) >>> 8; // 0x00FF????
grn = (grn * ig) >>> 16; // 0x0000FF??
blu = (blu * ib) >>> 24; // 0x000000FF
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
//
m_pixels[xstart] = ((br + (((red - br) * al) >> 8)) & 0xFF0000) |((bg + (((grn - bg) * al) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al) >> 8)) & 0xFF);
}
}
catch (Exception e) {
}
//
iu+=iuadd;
iv+=ivadd;
ir+=iradd;
ig+=igadd;
ib+=ibadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
rleft+=rleftadd;
gleft+=gleftadd;
bleft+=bleftadd;
zleft+=zleftadd;
}
}
/**
* Gouraud*texture blended with interpolating alpha
*/
private void drawsegment_gouraud_texture32_alpha
(
float leftadd,
float rghtadd,
int ytop,
int ybottom
) {
ytop*=SCREEN_WIDTH;
ybottom*=SCREEN_WIDTH;
int p = m_index;
float iuf = iuadd;
float ivf = ivadd;
float irf = iradd;
float igf = igadd;
float ibf = ibadd;
float iaf = iaadd;
while (ytop < ybottom) {
int xstart = (int) (xleft + PIXEL_CENTER);
if (xstart < 0)
xstart = 0;
int xend = (int) (xrght + PIXEL_CENTER);
if (xend > SCREEN_WIDTH)
xend = SCREEN_WIDTH;
float xdiff = (xstart + PIXEL_CENTER) - xleft;
int iu = (int) (iuf * xdiff + uleft);
int iv = (int) (ivf * xdiff + vleft);
int ir = (int) (irf * xdiff + rleft);
int ig = (int) (igf * xdiff + gleft);
int ib = (int) (ibf * xdiff + bleft);
int ia = (int) (iaf * xdiff + aleft);
float iz = izadd * xdiff + zleft;
xstart+=ytop;
xend+=ytop;
for ( ;xstart < xend; xstart++ ) {
// get texture pixel color
try
{
//if (iz < m_zbuffer[xstart]) {
if (iz <= m_zbuffer[xstart]) { // [fry 041114]
//m_zbuffer[xstart] = iz;
// blend
int al = ia >> 16;
int red;
int grn;
int blu;
if (m_bilinear) {
int ofs = (iv >> 16) * TEX_WIDTH + (iu >> 16);
int iui = (iu & 0xFFFF) >> 9;
int ivi = (iv & 0xFFFF) >> 9;
// get texture pixels
int pix0 = m_texture[ofs];
int pix1 = m_texture[ofs + 1];
ofs+=TEX_WIDTH;
int pix2 = m_texture[ofs];
int pix3 = m_texture[ofs + 1];
// red
int red0 = (pix0 & 0xFF0000);
int red2 = (pix2 & 0xFF0000);
int up = red0 + ((((pix1 & 0xFF0000) - red0) * iui) >> 7);
int dn = red2 + ((((pix3 & 0xFF0000) - red2) * iui) >> 7);
red = (up + (((dn-up) * ivi) >> 7)) >> 16;
// grn
red0 = (pix0 & 0xFF00);
red2 = (pix2 & 0xFF00);
up = red0 + ((((pix1 & 0xFF00) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF00) - red2) * iui) >> 7);
grn = (up + (((dn-up) * ivi) >> 7)) >> 8;
// blu
red0 = (pix0 & 0xFF);
red2 = (pix2 & 0xFF);
up = red0 + ((((pix1 & 0xFF) - red0) * iui) >> 7);
dn = red2 + ((((pix3 & 0xFF) - red2) * iui) >> 7);
blu = up + (((dn-up) * ivi) >> 7);
// alpha
pix0>>>=24;
pix2>>>=24;
up = pix0 + ((((pix1 >>> 24) - pix0) * iui) >> 7);
dn = pix2 + ((((pix3 >>> 24) - pix2) * iui) >> 7);
al = al * (up + (((dn-up) * ivi) >> 7)) >> 8;
} else {
blu = m_texture[(iv >> 16) * TEX_WIDTH + (iu >> 16)];
al = al * (blu >>> 24) >> 8;
red = (blu & 0xFF0000) >> 16; // 0 - 255
grn = (blu & 0xFF00) >> 8; // 0 - 255
blu = (blu & 0xFF); // 0 - 255
}
// multiply with gouraud color
red = (red * ir) >>> 8; // 0x00FF????
grn = (grn * ig) >>> 16; // 0x0000FF??
blu = (blu * ib) >>> 24; // 0x000000FF
// get buffer pixels
int bb = m_pixels[xstart];
int br = (bb & 0xFF0000); // 0x00FF0000
int bg = (bb & 0xFF00); // 0x0000FF00
bb = (bb & 0xFF); // 0x000000FF
//
m_pixels[xstart] = ((br + (((red - br) * al) >> 8)) & 0xFF0000) |((bg + (((grn - bg) * al) >> 8)) & 0xFF00) | ((bb + (((blu - bb) * al) >> 8)) & 0xFF);
m_stencil[xstart] = p;
}
}
catch (Exception e) {
}
//
iu+=iuadd;
iv+=ivadd;
ir+=iradd;
ig+=igadd;
ib+=ibadd;
ia+=iaadd;
iz+=izadd;
}
ytop+=SCREEN_WIDTH;
xleft+=leftadd;
xrght+=rghtadd;
uleft+=uleftadd;
vleft+=vleftadd;
rleft+=rleftadd;
gleft+=gleftadd;
bleft+=bleftadd;
aleft+=aleftadd;
zleft+=zleftadd;
}
}
}
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