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gl_warp.c
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gl_warp.c
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/*
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// gl_warp.c -- sky and water polygons
//#define NO_PNG
#ifndef NO_PNG
#include <png.h>
#endif
#include "quakedef.h"
extern model_t *loadmodel;
int skyshadernum;
int solidskytexture;
int alphaskytexture;
float speedscale; // for top sky and bottom sky
int newwatertex,newslimetex,newlavatex,newteletex,newenvmap; //PENTA: texture id's for the new fluid textures
msurface_t *warpface;
extern cvar_t gl_subdivide_size;
void BoundPoly (int numverts, float *verts, vec3_t mins, vec3_t maxs)
{
int i, j;
float *v;
mins[0] = mins[1] = mins[2] = 9999;
maxs[0] = maxs[1] = maxs[2] = -9999;
v = verts;
for (i=0 ; i<numverts ; i++)
for (j=0 ; j<3 ; j++, v++)
{
if (*v < mins[j])
mins[j] = *v;
if (*v > maxs[j])
maxs[j] = *v;
}
}
void SubdividePolygon (int numverts, float *verts)
{
int i, j, k;
vec3_t mins, maxs;
float m;
float *v;
vec3_t front[64], back[64];
int f, b;
float dist[64];
float frac;
glpoly_t *poly;
float s, t;
float tex[2];
byte color[4];
if (numverts > 60)
Sys_Error ("numverts = %i", numverts);
BoundPoly (numverts, verts, mins, maxs);
for (i=0 ; i<3 ; i++)
{
m = (mins[i] + maxs[i]) * 0.5;
m = gl_subdivide_size.value * floor (m/gl_subdivide_size.value + 0.5);
if (maxs[i] - m < 8)
continue;
if (m - mins[i] < 8)
continue;
// cut it
v = verts + i;
for (j=0 ; j<numverts ; j++, v+= 3)
dist[j] = *v - m;
// wrap cases
dist[j] = dist[0];
v-=i;
VectorCopy (verts, v);
f = b = 0;
v = verts;
for (j=0 ; j<numverts ; j++, v+= 3)
{
if (dist[j] >= 0)
{
VectorCopy (v, front[f]);
f++;
}
if (dist[j] <= 0)
{
VectorCopy (v, back[b]);
b++;
}
if (dist[j] == 0 || dist[j+1] == 0)
continue;
if ( (dist[j] > 0) != (dist[j+1] > 0) )
{
// clip point
frac = dist[j] / (dist[j] - dist[j+1]);
for (k=0 ; k<3 ; k++)
front[f][k] = back[b][k] = v[k] + frac*(v[3+k] - v[k]);
f++;
b++;
}
}
SubdividePolygon (f, front[0]);
SubdividePolygon (b, back[0]);
return;
}
poly = Hunk_Alloc(sizeof(glpoly_t));
poly->next = warpface->polys;
warpface->polys = poly;
poly->numverts = numverts;
poly->firstvertex = R_GetNextVertexIndex();
for (i=0; i<4; i++) color[i] = 255;
for (i=0 ; i<numverts ; i++, verts+= 3)
{
//tex[0] = DotProduct (verts, warpface->texinfo->vecs[0]);
//tex[1] = DotProduct (verts, warpface->texinfo->vecs[1]);
//Penta: lighmap coords are ignored...
R_AllocateVertexInTemp(verts,tex,tex,color);
}
}
/*
=================================================================
Quake 2 environment sky
=================================================================
*/
#ifdef QUAKE2
#define SKY_TEX 2000
/*
=================================================================
PCX Loading
=================================================================
*/
typedef struct
{
char manufacturer;
char version;
char encoding;
char bits_per_pixel;
unsigned short xmin,ymin,xmax,ymax;
unsigned short hres,vres;
unsigned char palette[48];
char reserved;
char color_planes;
unsigned short bytes_per_line;
unsigned short palette_type;
char filler[58];
unsigned data; // unbounded
} pcx_t;
byte *pcx_rgb;
/*
============
LoadPCX
============
*/
void LoadPCX (FILE *f)
{
pcx_t *pcx, pcxbuf;
byte palette[768];
byte *pix;
int x, y;
int dataByte, runLength;
int count;
//
// parse the PCX file
//
fread (&pcxbuf, 1, sizeof(pcxbuf), f);
pcx = &pcxbuf;
if (pcx->manufacturer != 0x0a
|| pcx->version != 5
|| pcx->encoding != 1
|| pcx->bits_per_pixel != 8
|| pcx->xmax >= 320
|| pcx->ymax >= 256)
{
Con_Printf ("Bad pcx file\n");
return;
}
// seek to palette
fseek (f, -768, SEEK_END);
fread (palette, 1, 768, f);
fseek (f, sizeof(pcxbuf) - 4, SEEK_SET);
count = (pcx->xmax+1) * (pcx->ymax+1);
pcx_rgb = malloc( count * 4);
for (y=0 ; y<=pcx->ymax ; y++)
{
pix = pcx_rgb + 4*y*(pcx->xmax+1);
for (x=0 ; x<=pcx->ymax ; )
{
dataByte = fgetc(f);
if((dataByte & 0xC0) == 0xC0)
{
runLength = dataByte & 0x3F;
dataByte = fgetc(f);
}
else
runLength = 1;
while(runLength-- > 0)
{
pix[0] = palette[dataByte*3];
pix[1] = palette[dataByte*3+1];
pix[2] = palette[dataByte*3+2];
pix[3] = 255;
pix += 4;
x++;
}
}
}
}
#endif
//PENTA: removed this from the ifdef QUAKE2
/*
=========================================================
TARGA LOADING
=========================================================
*/
/* -DC- moved typedef to targa.h */
TargaHeader targa_header;
byte *targa_rgba;
int fgetLittleShort (FILE *f)
{
byte b1, b2;
b1 = fgetc(f);
b2 = fgetc(f);
return (short)(b1 + b2*256);
}
int fgetLittleLong (FILE *f)
{
byte b1, b2, b3, b4;
b1 = fgetc(f);
b2 = fgetc(f);
b3 = fgetc(f);
b4 = fgetc(f);
return b1 + (b2<<8) + (b3<<16) + (b4<<24);
}
static char argh[MAX_OSPATH];
// Proper replacement for LoadTGA and friends
int LoadTexture(char* filename, int size)
{
FILE *f;
char* tmp;
// Check for *.png first, then *.jpg, fall back to *.tga if not found...
// first replace the last three letters with png (yeah, hack)
strncpy(argh, filename,sizeof(argh));
tmp = argh + strlen(filename) - 3;
#ifndef NO_PNG
tmp[0] = 'p';
tmp[1] = 'n';
tmp[2] = 'g';
COM_FOpenFile (argh, &f);
if ( f )
{
png_infop info_ptr;
png_structp png_ptr;
char* mem;
unsigned long width, height;
int bit_depth;
int color_type;
unsigned char** rows;
int i;
png_color_16 background = {0, 0, 0};
png_color_16p image_background;
Con_DPrintf("Loading %s\n", argh);
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
info_ptr = png_create_info_struct(png_ptr);
png_init_io(png_ptr, f);
png_set_sig_bytes(png_ptr, 0);
png_read_info(png_ptr, info_ptr);
png_get_IHDR(png_ptr, info_ptr, &width, &height,
&bit_depth, &color_type, 0, 0, 0);
// Allocate memory and get data there
mem = malloc(size*height*width);
rows = malloc(height*sizeof(char*));
if ( bit_depth == 16)
png_set_strip_16(png_ptr);
if ( color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8 )
png_set_gray_1_2_4_to_8(png_ptr);
png_set_gamma(png_ptr, 1.0, 1.0);
if ( size == 4 )
{
if ( color_type & PNG_COLOR_MASK_PALETTE )
png_set_palette_to_rgb(png_ptr);
if ( png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS) )
png_set_tRNS_to_alpha(png_ptr);
if ( (color_type & PNG_COLOR_MASK_COLOR) == 0 )
png_set_gray_to_rgb(png_ptr);
if ( (color_type & PNG_COLOR_MASK_ALPHA) == 0 )
png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
}
else
{
if ( color_type & PNG_COLOR_MASK_ALPHA )
png_set_strip_alpha(png_ptr);
if ( color_type & PNG_COLOR_MASK_PALETTE )
{
png_set_palette_to_rgb(png_ptr);
}
if ( color_type & PNG_COLOR_MASK_COLOR )
png_set_rgb_to_gray_fixed(png_ptr, 1, -1, -1);
}
for ( i = 0; i < height; i++ )
{
rows[i] = mem + size * width * i;
}
png_read_image(png_ptr, rows);
png_destroy_read_struct(&png_ptr, &info_ptr, 0);
free(rows);
targa_header.width = width;
targa_header.height = height;
targa_rgba = mem;
fclose(f);
return 1;
}
#endif
tmp[0] = 't';
tmp[1] = 'g';
tmp[2] = 'a';
COM_FOpenFile (argh, &f);
if (!f)
{
return 0;
}
LoadTGA(f);
return 1;
}
int LoadTextureInPlace(char* filename, int size, byte* mem, int* width, int* height)
{
FILE *f;
char* tmp;
// Check for *.png first, then *.jpg, fall back to *.tga if not found...
// first replace the last three letters with png (yeah, hack)
strncpy(argh, filename,sizeof(argh));
tmp = argh + strlen(filename) - 3;
#ifndef NO_PNG
tmp[0] = 'p';
tmp[1] = 'n';
tmp[2] = 'g';
COM_FOpenFile (argh, &f);
if ( f )
{
png_infop info_ptr;
png_structp png_ptr;
int bit_depth;
int color_type;
unsigned long mywidth, myheight;
unsigned char** rows;
int i;
png_color_16 background = {0, 0, 0};
png_color_16p image_background;
Con_DPrintf("Loading %s\n", argh);
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
info_ptr = png_create_info_struct(png_ptr);
png_init_io(png_ptr, f);
png_set_sig_bytes(png_ptr, 0);
png_read_info(png_ptr, info_ptr);
png_get_IHDR(png_ptr, info_ptr, &mywidth, &myheight,
&bit_depth, &color_type, 0, 0, 0);
*width=mywidth;
*height=myheight;
// Allocate memory and get data there
rows = malloc(*height*sizeof(char*));
if ( bit_depth == 16)
png_set_strip_16(png_ptr);
if ( color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8 )
png_set_gray_1_2_4_to_8(png_ptr);
png_set_gamma(png_ptr, 1.0, 1.0);
if ( size == 4 )
{
if ( color_type & PNG_COLOR_MASK_PALETTE )
png_set_palette_to_rgb(png_ptr);
if ( png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS) )
png_set_tRNS_to_alpha(png_ptr);
if ( (color_type & PNG_COLOR_MASK_COLOR) == 0 )
png_set_gray_to_rgb(png_ptr);
if ( (color_type & PNG_COLOR_MASK_ALPHA) == 0 )
png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
}
else
{
if ( color_type & PNG_COLOR_MASK_ALPHA )
png_set_strip_alpha(png_ptr);
if ( color_type & PNG_COLOR_MASK_PALETTE )
{
png_set_palette_to_rgb(png_ptr);
}
if ( color_type & PNG_COLOR_MASK_COLOR )
png_set_rgb_to_gray_fixed(png_ptr, 1, -1, -1);
}
for ( i = 0; i < *height; i++ )
{
rows[i] = mem + size * *width * i;
}
png_read_image(png_ptr, rows);
png_destroy_read_struct(&png_ptr, &info_ptr, 0);
free(rows);
fclose(f);
return 1;
}
#endif
tmp[0] = 't';
tmp[1] = 'g';
tmp[2] = 'a';
COM_FOpenFile (argh, &f);
if (!f)
{
// Con_SafePrintf ("Couldn't load %s\n", argh);
return 0;
}
if ( size == 4 )
LoadColorTGA(f, mem, width, height);
else
LoadGrayTGA(f, mem, width, height);
return 1;
}
/*
=============
LoadTGA
=============
*/
void LoadTGA (FILE *fin)
{
int columns, rows, numPixels;
byte *pixbuf;
int row, column;
int row_inc;
targa_header.id_length = fgetc(fin);
targa_header.colormap_type = fgetc(fin);
targa_header.image_type = fgetc(fin);
targa_header.colormap_index = fgetLittleShort(fin);
targa_header.colormap_length = fgetLittleShort(fin);
targa_header.colormap_size = fgetc(fin);
targa_header.x_origin = fgetLittleShort(fin);
targa_header.y_origin = fgetLittleShort(fin);
targa_header.width = fgetLittleShort(fin);
targa_header.height = fgetLittleShort(fin);
targa_header.pixel_size = fgetc(fin);
targa_header.attributes = fgetc(fin);
if (targa_header.image_type!=2
&& targa_header.image_type!=10)
Sys_Error ("LoadTGA: Only type 2 and 10 targa RGB images supported\n");
if (targa_header.colormap_type !=0
|| (targa_header.pixel_size!=32 && targa_header.pixel_size!=24))
Sys_Error ("Texture_LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n");
columns = targa_header.width;
rows = targa_header.height;
numPixels = columns * rows;
targa_rgba = malloc (numPixels*4);
if (targa_header.id_length != 0)
fseek(fin, targa_header.id_length, SEEK_CUR); // skip TARGA image comment
// If bit 5 of attributes isn't set, the image has been stored from bottom to top
if ((targa_header.attributes & 0x20) == 0)
{
pixbuf = targa_rgba + (rows - 1)*columns*4;
row_inc = -columns*4*2;
}
else
{
pixbuf = targa_rgba;
row_inc = 0;
}
if (targa_header.image_type==2) { // Uncompressed, RGB images
for(row=rows-1; row>=0; row--, pixbuf += row_inc) {
for(column=0; column<columns; column++) {
unsigned char red,green,blue,alphabyte;
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
}
}
}
}
else if (targa_header.image_type==10) { // Runlength encoded RGB images
unsigned char red = 0x00,green = 0x00,blue = 0x00,alphabyte = 0x00,packetHeader,packetSize,j;
for(row=rows-1; row>=0; row--, pixbuf += row_inc) {
for(column=0; column<columns; ) {
packetHeader=getc(fin);
packetSize = 1 + (packetHeader & 0x7f);
if (packetHeader & 0x80) { // run-length packet
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
break;
}
for(j=0;j<packetSize;j++) {
*pixbuf++=red;
*pixbuf++=green;
*pixbuf++=blue;
*pixbuf++=alphabyte;
column++;
if (column==columns) { // run spans across rows
column=0;
if (row>0) {
row--;
pixbuf += row_inc;
}
else
goto breakOut;
}
}
}
else { // non run-length packet
for(j=0;j<packetSize;j++) {
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
}
column++;
if (column==columns) { // pixel packet run spans across rows
column=0;
if (row>0) {
row--;
pixbuf += row_inc;
}
else
goto breakOut;
}
}
}
}
breakOut:;
}
}
fclose(fin);
}
/*
=============
LoadColorTGA
PENTA: loads a color tga (rgb/rgba/or quake palette)
returns width & height in the references.
=============
*/
void LoadColorTGA (FILE *fin, byte *pixels, int *width, int *height)
{
int columns, rows, numPixels;
byte *pixbuf;
int row, column;
int row_inc;
byte palette[256][3];
targa_header.id_length = fgetc(fin);
targa_header.colormap_type = fgetc(fin);
targa_header.image_type = fgetc(fin);
targa_header.colormap_index = fgetLittleShort(fin);
targa_header.colormap_length = fgetLittleShort(fin);
targa_header.colormap_size = fgetc(fin);
targa_header.x_origin = fgetLittleShort(fin);
targa_header.y_origin = fgetLittleShort(fin);
targa_header.width = fgetLittleShort(fin);
targa_header.height = fgetLittleShort(fin);
targa_header.pixel_size = fgetc(fin);
targa_header.attributes = fgetc(fin);
if (targa_header.image_type!=2
&& targa_header.image_type!=10 && targa_header.image_type!=1)
Sys_Error ("LoadColorTGA: Only type 1, 2 and 10 targa images supported, type was %i\n",targa_header.image_type);
/*
if (targa_header.colormap_type !=0
|| (targa_header.pixel_size!=32 && targa_header.pixel_size!=24))
Sys_Error ("Texture_LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n");
*/
if (targa_header.image_type==1 && targa_header.pixel_size != 8 &&
targa_header.colormap_size != 24 && targa_header.colormap_length != 256)
Sys_Error ("LoadGrayTGA: Strange palette type\n");
columns = targa_header.width;
rows = targa_header.height;
numPixels = columns * rows;
targa_rgba = pixels;
if (targa_header.id_length != 0)
fseek(fin, targa_header.id_length, SEEK_CUR); // skip TARGA image comment
// If bit 5 of attributes isn't set, the image has been stored from bottom to top
if ((targa_header.attributes & 0x20) == 0)
{
pixbuf = targa_rgba + (rows - 1)*columns*4;
row_inc = -columns*4*2;
}
else
{
pixbuf = targa_rgba;
row_inc = 0;
}
if (targa_header.image_type==1) { // Color mapped
//fseek(fin, 768, SEEK_CUR); // skip palette
fread(palette, 1, 768, fin);
for(row=rows-1; row>=0; row--, pixbuf += row_inc) {
for(column=0; column<columns; column++) {
unsigned char index;
index = getc(fin);
*(int *)pixbuf = 0xFF000000 || (palette[index][0] << 16) || (palette[index][0] << 8) || (palette[index][0]);
pixbuf+=4;
}
}
} else if (targa_header.image_type==2) { // Uncompressed, RGB images
for(row=rows-1; row>=0; row--, pixbuf += row_inc) {
for(column=0; column<columns; column++) {
unsigned char red,green,blue,alphabyte;
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
}
}
}
}
else if (targa_header.image_type==10) { // Runlength encoded RGB images
unsigned char red = 0x00,green = 0x00,blue = 0x00,alphabyte = 0x00,packetHeader,packetSize,j;
for(row=rows-1; row>=0; row--, pixbuf += row_inc) {
for(column=0; column<columns; ) {
packetHeader=getc(fin);
packetSize = 1 + (packetHeader & 0x7f);
if (packetHeader & 0x80) { // run-length packet
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
break;
}
for(j=0;j<packetSize;j++) {
*pixbuf++=red;
*pixbuf++=green;
*pixbuf++=blue;
*pixbuf++=alphabyte;
column++;
if (column==columns) { // run spans across rows
column=0;
if (row>0) {
row--;
pixbuf += row_inc;
}
else
goto breakOut;
}
}
}
else { // non run-length packet
for(j=0;j<packetSize;j++) {
switch (targa_header.pixel_size) {
case 24:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = getc(fin);
green = getc(fin);
red = getc(fin);
alphabyte = getc(fin);
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
}
column++;
if (column==columns) { // pixel packet run spans across rows
column=0;
if (row>0) {
row--;
pixbuf += row_inc;
}
else
goto breakOut;
}
}
}
}
breakOut:;
}
}
//we didn't load a paletted image so we still have to fix the gamma
/*
Just let the uses specify the gamma in the image editor
if (targa_header.image_type != 1) {
int i;
float f, inf;
for (i=0 ; i<numPixels*4; i++)
{
f = pow ( (targa_rgba[i]+1)/256.0 , 0.7 );
inf = f*255 + 0.5;
if (inf < 0)
inf = 0;
if (inf > 255)
inf = 255;
targa_rgba[i] = inf;
}
}
*/
fclose(fin);
*width = targa_header.width;
*height = targa_header.height;
}
/*
=============
LoadGrayTGA
PENTA: Load a grayscale tga for bump maps
Copies the result to pixbuf (bytes not rgb) and puts the width & height in the references.
=============
*/
void LoadGrayTGA (FILE *fin,byte *pixels,int *width, int *height)
{
int columns, rows, numPixels;
int row, column;
byte *pixbuf;
int row_inc;
targa_header.id_length = fgetc(fin);
targa_header.colormap_type = fgetc(fin);
targa_header.image_type = fgetc(fin);
targa_header.colormap_index = fgetLittleShort(fin);
targa_header.colormap_length = fgetLittleShort(fin);
targa_header.colormap_size = fgetc(fin);
targa_header.x_origin = fgetLittleShort(fin);
targa_header.y_origin = fgetLittleShort(fin);
targa_header.width = fgetLittleShort(fin);
targa_header.height = fgetLittleShort(fin);
targa_header.pixel_size = fgetc(fin);
targa_header.attributes = fgetc(fin);
if (targa_header.image_type!=1
&& targa_header.image_type!=3)
Sys_Error ("LoadGrayTGA: Only type 1 and 3 targa images supported for bump maps.\n");
if (targa_header.image_type==1 && targa_header.pixel_size != 8 &&
targa_header.colormap_size != 24 && targa_header.colormap_length != 256)
Sys_Error ("LoadGrayTGA: Strange palette type\n");
columns = targa_header.width;
rows = targa_header.height;
numPixels = columns * rows;
// If bit 5 of attributes isn't set, the image has been stored from bottom to top
if ((targa_header.attributes & 0x20) == 0)
{
pixbuf = pixels + (rows - 1)*columns;
row_inc = -columns*2;
}
else
{
pixbuf = pixels;
row_inc = 0;
}
if (targa_header.id_length != 0)
fseek(fin, targa_header.id_length, SEEK_CUR); // skip TARGA image comment
if (targa_header.image_type == 1) {
fseek(fin, 768, SEEK_CUR);//skip palette
}
//fread(pixbuf,1,numPixels,fin);
for(row=rows-1; row>=0; row--, pixbuf += row_inc) {
for(column=0; column<columns; column++) {
*pixbuf++= getc(fin);
}
}
fclose(fin);
*width = targa_header.width;
*height = targa_header.height;
}
/*
==================
PENTA:
Loads the tga in filename and returns the texture object
in gl texture object.
==================
*/
int EasyTgaLoad(char *filename)
{
FILE *f;
int texturemode;
unsigned long width, height;
char* tmp;
char* mem;
if ( gl_texcomp && ((int)gl_compress_textures.value) & 1 )
{
texturemode = GL_COMPRESSED_RGBA_ARB;
}
else
{
texturemode = GL_RGBA8;
}
GL_Bind (texture_extension_number);
// Check for *.png first, then *.jpg, fall back to *.tga if not found...
// first replace the last three letters with png (yeah, hack)
strncpy(argh, filename,sizeof(argh));
tmp = argh + strlen(filename) - 3;
#ifndef NO_PNG
tmp[0] = 'p';
tmp[1] = 'n';
tmp[2] = 'g';
COM_FOpenFile (argh, &f);
if ( f )
{