mirror of
https://github.com/dhewm/dhewm3.git
synced 2024-11-27 06:32:27 +00:00
644 lines
14 KiB
C++
644 lines
14 KiB
C++
/*
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===========================================================================
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Doom 3 GPL Source Code
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Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
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Doom 3 Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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/*
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all uncompressed
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uncompressed normal maps
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downsample images
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16 meg Dynamic cache
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Anisotropic texturing
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Trilinear on all
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Trilinear on normal maps, bilinear on others
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Bilinear on all
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Manager
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->List
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->Print
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->Reload( bool force )
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*/
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#include "../idlib/precompiled.h"
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#pragma hdrstop
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// tr_imageprogram.c
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#include "tr_local.h"
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/*
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Anywhere that an image name is used (diffusemaps, bumpmaps, specularmaps, lights, etc),
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an imageProgram can be specified.
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This allows load time operations, like heightmap-to-normalmap conversion and image
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composition, to be automatically handled in a way that supports timestamped reloads.
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*/
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/*
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=================
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R_HeightmapToNormalMap
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it is not possible to convert a heightmap into a normal map
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properly without knowing the texture coordinate stretching.
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We can assume constant and equal ST vectors for walls, but not for characters.
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=================
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*/
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static void R_HeightmapToNormalMap( byte *data, int width, int height, float scale ) {
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int i, j;
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byte *depth;
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scale = scale / 256;
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// copy and convert to grey scale
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j = width * height;
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depth = (byte *)R_StaticAlloc( j );
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for ( i = 0 ; i < j ; i++ ) {
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depth[i] = ( data[i*4] + data[i*4+1] + data[i*4+2] ) / 3;
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}
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idVec3 dir, dir2;
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for ( i = 0 ; i < height ; i++ ) {
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for ( j = 0 ; j < width ; j++ ) {
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int d1, d2, d3, d4;
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int a1, a2, a3, a4;
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// FIXME: look at five points?
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// look at three points to estimate the gradient
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a1 = d1 = depth[ ( i * width + j ) ];
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a2 = d2 = depth[ ( i * width + ( ( j + 1 ) & ( width - 1 ) ) ) ];
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a3 = d3 = depth[ ( ( ( i + 1 ) & ( height - 1 ) ) * width + j ) ];
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a4 = d4 = depth[ ( ( ( i + 1 ) & ( height - 1 ) ) * width + ( ( j + 1 ) & ( width - 1 ) ) ) ];
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d2 -= d1;
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d3 -= d1;
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dir[0] = -d2 * scale;
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dir[1] = -d3 * scale;
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dir[2] = 1;
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dir.NormalizeFast();
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a1 -= a3;
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a4 -= a3;
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dir2[0] = -a4 * scale;
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dir2[1] = a1 * scale;
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dir2[2] = 1;
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dir2.NormalizeFast();
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dir += dir2;
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dir.NormalizeFast();
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a1 = ( i * width + j ) * 4;
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data[ a1 + 0 ] = (byte)(dir[0] * 127 + 128);
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data[ a1 + 1 ] = (byte)(dir[1] * 127 + 128);
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data[ a1 + 2 ] = (byte)(dir[2] * 127 + 128);
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data[ a1 + 3 ] = 255;
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}
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}
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R_StaticFree( depth );
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}
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/*
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=================
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R_ImageScale
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=================
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*/
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static void R_ImageScale( byte *data, int width, int height, float scale[4] ) {
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int i, j;
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int c;
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c = width * height * 4;
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for ( i = 0 ; i < c ; i++ ) {
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j = (byte)(data[i] * scale[i&3]);
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if ( j < 0 ) {
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j = 0;
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} else if ( j > 255 ) {
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j = 255;
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}
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data[i] = j;
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}
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}
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/*
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=================
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R_InvertAlpha
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=================
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*/
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static void R_InvertAlpha( byte *data, int width, int height ) {
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int i;
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int c;
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c = width * height* 4;
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for ( i = 0 ; i < c ; i+=4 ) {
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data[i+3] = 255 - data[i+3];
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}
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}
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/*
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=================
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R_InvertColor
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=================
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*/
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static void R_InvertColor( byte *data, int width, int height ) {
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int i;
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int c;
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c = width * height* 4;
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for ( i = 0 ; i < c ; i+=4 ) {
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data[i+0] = 255 - data[i+0];
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data[i+1] = 255 - data[i+1];
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data[i+2] = 255 - data[i+2];
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}
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}
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/*
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===================
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R_AddNormalMaps
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===================
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*/
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static void R_AddNormalMaps( byte *data1, int width1, int height1, byte *data2, int width2, int height2 ) {
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int i, j;
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byte *newMap;
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// resample pic2 to the same size as pic1
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if ( width2 != width1 || height2 != height1 ) {
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newMap = R_Dropsample( data2, width2, height2, width1, height1 );
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data2 = newMap;
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} else {
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newMap = NULL;
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}
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// add the normal change from the second and renormalize
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for ( i = 0 ; i < height1 ; i++ ) {
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for ( j = 0 ; j < width1 ; j++ ) {
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byte *d1, *d2;
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idVec3 n;
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float len;
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d1 = data1 + ( i * width1 + j ) * 4;
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d2 = data2 + ( i * width1 + j ) * 4;
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n[0] = ( d1[0] - 128 ) / 127.0;
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n[1] = ( d1[1] - 128 ) / 127.0;
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n[2] = ( d1[2] - 128 ) / 127.0;
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// There are some normal maps that blend to 0,0,0 at the edges
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// this screws up compression, so we try to correct that here by instead fading it to 0,0,1
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len = n.LengthFast();
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if ( len < 1.0f ) {
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n[2] = idMath::Sqrt(1.0 - (n[0]*n[0]) - (n[1]*n[1]));
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}
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n[0] += ( d2[0] - 128 ) / 127.0;
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n[1] += ( d2[1] - 128 ) / 127.0;
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n.Normalize();
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d1[0] = (byte)(n[0] * 127 + 128);
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d1[1] = (byte)(n[1] * 127 + 128);
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d1[2] = (byte)(n[2] * 127 + 128);
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d1[3] = 255;
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}
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}
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if ( newMap ) {
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R_StaticFree( newMap );
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}
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}
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/*
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================
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R_SmoothNormalMap
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================
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*/
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static void R_SmoothNormalMap( byte *data, int width, int height ) {
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byte *orig;
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int i, j, k, l;
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idVec3 normal;
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byte *out;
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static float factors[3][3] = {
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{ 1, 1, 1 },
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{ 1, 1, 1 },
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{ 1, 1, 1 }
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};
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orig = (byte *)R_StaticAlloc( width * height * 4 );
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memcpy( orig, data, width * height * 4 );
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for ( i = 0 ; i < width ; i++ ) {
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for ( j = 0 ; j < height ; j++ ) {
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normal = vec3_origin;
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for ( k = -1 ; k < 2 ; k++ ) {
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for ( l = -1 ; l < 2 ; l++ ) {
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byte *in;
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in = orig + ( ((j+l)&(height-1))*width + ((i+k)&(width-1)) ) * 4;
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// ignore 000 and -1 -1 -1
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if ( in[0] == 0 && in[1] == 0 && in[2] == 0 ) {
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continue;
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}
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if ( in[0] == 128 && in[1] == 128 && in[2] == 128 ) {
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continue;
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}
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normal[0] += factors[k+1][l+1] * ( in[0] - 128 );
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normal[1] += factors[k+1][l+1] * ( in[1] - 128 );
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normal[2] += factors[k+1][l+1] * ( in[2] - 128 );
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}
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}
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normal.Normalize();
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out = data + ( j * width + i ) * 4;
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out[0] = (byte)(128 + 127 * normal[0]);
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out[1] = (byte)(128 + 127 * normal[1]);
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out[2] = (byte)(128 + 127 * normal[2]);
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}
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}
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R_StaticFree( orig );
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}
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/*
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===================
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R_ImageAdd
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===================
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*/
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static void R_ImageAdd( byte *data1, int width1, int height1, byte *data2, int width2, int height2 ) {
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int i, j;
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int c;
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byte *newMap;
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// resample pic2 to the same size as pic1
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if ( width2 != width1 || height2 != height1 ) {
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newMap = R_Dropsample( data2, width2, height2, width1, height1 );
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data2 = newMap;
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} else {
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newMap = NULL;
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}
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c = width1 * height1 * 4;
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for ( i = 0 ; i < c ; i++ ) {
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j = data1[i] + data2[i];
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if ( j > 255 ) {
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j = 255;
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}
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data1[i] = j;
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}
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if ( newMap ) {
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R_StaticFree( newMap );
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}
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}
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// we build a canonical token form of the image program here
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static char parseBuffer[MAX_IMAGE_NAME];
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/*
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===================
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AppendToken
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===================
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*/
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static void AppendToken( idToken &token ) {
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// add a leading space if not at the beginning
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if ( parseBuffer[0] ) {
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idStr::Append( parseBuffer, MAX_IMAGE_NAME, " " );
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}
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idStr::Append( parseBuffer, MAX_IMAGE_NAME, token.c_str() );
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}
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/*
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===================
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MatchAndAppendToken
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===================
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*/
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static void MatchAndAppendToken( idLexer &src, const char *match ) {
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if ( !src.ExpectTokenString( match ) ) {
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return;
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}
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// a matched token won't need a leading space
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idStr::Append( parseBuffer, MAX_IMAGE_NAME, match );
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}
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/*
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===================
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R_ParseImageProgram_r
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If pic is NULL, the timestamps will be filled in, but no image will be generated
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If both pic and timestamps are NULL, it will just advance past it, which can be
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used to parse an image program from a text stream.
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===================
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*/
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static bool R_ParseImageProgram_r( idLexer &src, byte **pic, int *width, int *height,
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ID_TIME_T *timestamps, textureDepth_t *depth ) {
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idToken token;
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float scale;
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ID_TIME_T timestamp;
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src.ReadToken( &token );
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AppendToken( token );
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if ( !token.Icmp( "heightmap" ) ) {
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MatchAndAppendToken( src, "(" );
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if ( !R_ParseImageProgram_r( src, pic, width, height, timestamps, depth ) ) {
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return false;
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}
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MatchAndAppendToken( src, "," );
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src.ReadToken( &token );
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AppendToken( token );
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scale = token.GetFloatValue();
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// process it
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if ( pic ) {
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R_HeightmapToNormalMap( *pic, *width, *height, scale );
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if ( depth ) {
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*depth = TD_BUMP;
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}
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}
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MatchAndAppendToken( src, ")" );
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return true;
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}
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if ( !token.Icmp( "addnormals" ) ) {
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byte *pic2;
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int width2, height2;
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MatchAndAppendToken( src, "(" );
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if ( !R_ParseImageProgram_r( src, pic, width, height, timestamps, depth ) ) {
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return false;
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}
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MatchAndAppendToken( src, "," );
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if ( !R_ParseImageProgram_r( src, pic ? &pic2 : NULL, &width2, &height2, timestamps, depth ) ) {
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if ( pic ) {
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R_StaticFree( *pic );
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*pic = NULL;
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}
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return false;
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}
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// process it
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if ( pic ) {
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R_AddNormalMaps( *pic, *width, *height, pic2, width2, height2 );
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R_StaticFree( pic2 );
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if ( depth ) {
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*depth = TD_BUMP;
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}
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}
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MatchAndAppendToken( src, ")" );
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return true;
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}
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if ( !token.Icmp( "smoothnormals" ) ) {
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MatchAndAppendToken( src, "(" );
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if ( !R_ParseImageProgram_r( src, pic, width, height, timestamps, depth ) ) {
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return false;
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}
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if ( pic ) {
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R_SmoothNormalMap( *pic, *width, *height );
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if ( depth ) {
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*depth = TD_BUMP;
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}
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}
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MatchAndAppendToken( src, ")" );
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return true;
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}
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if ( !token.Icmp( "add" ) ) {
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byte *pic2;
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int width2, height2;
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MatchAndAppendToken( src, "(" );
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if ( !R_ParseImageProgram_r( src, pic, width, height, timestamps, depth ) ) {
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return false;
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}
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MatchAndAppendToken( src, "," );
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if ( !R_ParseImageProgram_r( src, pic ? &pic2 : NULL, &width2, &height2, timestamps, depth ) ) {
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if ( pic ) {
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R_StaticFree( *pic );
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*pic = NULL;
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}
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return false;
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}
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// process it
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if ( pic ) {
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R_ImageAdd( *pic, *width, *height, pic2, width2, height2 );
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R_StaticFree( pic2 );
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}
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MatchAndAppendToken( src, ")" );
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return true;
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}
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if ( !token.Icmp( "scale" ) ) {
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float scale[4];
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int i;
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MatchAndAppendToken( src, "(" );
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R_ParseImageProgram_r( src, pic, width, height, timestamps, depth );
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for ( i = 0 ; i < 4 ; i++ ) {
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MatchAndAppendToken( src, "," );
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src.ReadToken( &token );
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AppendToken( token );
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scale[i] = token.GetFloatValue();
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}
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// process it
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if ( pic ) {
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R_ImageScale( *pic, *width, *height, scale );
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}
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MatchAndAppendToken( src, ")" );
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return true;
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}
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if ( !token.Icmp( "invertAlpha" ) ) {
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MatchAndAppendToken( src, "(" );
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R_ParseImageProgram_r( src, pic, width, height, timestamps, depth );
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// process it
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if ( pic ) {
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R_InvertAlpha( *pic, *width, *height );
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}
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MatchAndAppendToken( src, ")" );
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return true;
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}
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if ( !token.Icmp( "invertColor" ) ) {
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MatchAndAppendToken( src, "(" );
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R_ParseImageProgram_r( src, pic, width, height, timestamps, depth );
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// process it
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if ( pic ) {
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R_InvertColor( *pic, *width, *height );
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}
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MatchAndAppendToken( src, ")" );
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return true;
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}
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if ( !token.Icmp( "makeIntensity" ) ) {
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int i;
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MatchAndAppendToken( src, "(" );
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R_ParseImageProgram_r( src, pic, width, height, timestamps, depth );
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// copy red to green, blue, and alpha
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if ( pic ) {
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int c;
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c = *width * *height * 4;
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for ( i = 0 ; i < c ; i+=4 ) {
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(*pic)[i+1] =
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(*pic)[i+2] =
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(*pic)[i+3] = (*pic)[i];
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}
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}
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MatchAndAppendToken( src, ")" );
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return true;
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}
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if ( !token.Icmp( "makeAlpha" ) ) {
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int i;
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MatchAndAppendToken( src, "(" );
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|
|
R_ParseImageProgram_r( src, pic, width, height, timestamps, depth );
|
|
|
|
// average RGB into alpha, then set RGB to white
|
|
if ( pic ) {
|
|
int c;
|
|
c = *width * *height * 4;
|
|
for ( i = 0 ; i < c ; i+=4 ) {
|
|
(*pic)[i+3] = ( (*pic)[i+0] + (*pic)[i+1] + (*pic)[i+2] ) / 3;
|
|
(*pic)[i+0] =
|
|
(*pic)[i+1] =
|
|
(*pic)[i+2] = 255;
|
|
}
|
|
}
|
|
|
|
MatchAndAppendToken( src, ")" );
|
|
return true;
|
|
}
|
|
|
|
// if we are just parsing instead of loading or checking,
|
|
// don't do the R_LoadImage
|
|
if ( !timestamps && !pic ) {
|
|
return true;
|
|
}
|
|
|
|
// load it as an image
|
|
R_LoadImage( token.c_str(), pic, width, height, ×tamp, true );
|
|
|
|
if ( timestamp == -1 ) {
|
|
return false;
|
|
}
|
|
|
|
// add this to the timestamp
|
|
if ( timestamps ) {
|
|
if ( timestamp > *timestamps ) {
|
|
*timestamps = timestamp;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/*
|
|
===================
|
|
R_LoadImageProgram
|
|
===================
|
|
*/
|
|
void R_LoadImageProgram( const char *name, byte **pic, int *width, int *height, ID_TIME_T *timestamps, textureDepth_t *depth ) {
|
|
idLexer src;
|
|
|
|
src.LoadMemory( name, strlen(name), name );
|
|
src.SetFlags( LEXFL_NOFATALERRORS | LEXFL_NOSTRINGCONCAT | LEXFL_NOSTRINGESCAPECHARS | LEXFL_ALLOWPATHNAMES );
|
|
|
|
parseBuffer[0] = 0;
|
|
if ( timestamps ) {
|
|
*timestamps = 0;
|
|
}
|
|
|
|
R_ParseImageProgram_r( src, pic, width, height, timestamps, depth );
|
|
|
|
src.FreeSource();
|
|
}
|
|
|
|
/*
|
|
===================
|
|
R_ParsePastImageProgram
|
|
===================
|
|
*/
|
|
const char *R_ParsePastImageProgram( idLexer &src ) {
|
|
parseBuffer[0] = 0;
|
|
R_ParseImageProgram_r( src, NULL, NULL, NULL, NULL, NULL );
|
|
return parseBuffer;
|
|
}
|
|
|