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glquake/source/gl_draw.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.
*/
// draw.c -- this is the only file outside the refresh that touches the
// vid buffer
#include "quakedef.h"
#define GL_COLOR_INDEX8_EXT 0x80E5
extern unsigned char d_15to8table[65536];
cvar_t gl_nobind = {"gl_nobind", "0"};
cvar_t gl_max_size = {"gl_max_size", "1024"};
cvar_t gl_picmip = {"gl_picmip", "0"};
byte *draw_chars; // 8*8 graphic characters
qpic_t *draw_disc;
qpic_t *draw_backtile;
int translate_texture;
int char_texture;
typedef struct
{
int texnum;
float sl, tl, sh, th;
} glpic_t;
byte conback_buffer[sizeof(qpic_t) + sizeof(glpic_t)];
qpic_t *conback = (qpic_t *)&conback_buffer;
int gl_lightmap_format = 4;
int gl_solid_format = 3;
int gl_alpha_format = 4;
int gl_filter_min = GL_LINEAR_MIPMAP_NEAREST;
int gl_filter_max = GL_LINEAR;
int texels;
typedef struct
{
int texnum;
char identifier[64];
int width, height;
qboolean mipmap;
int checksum;
// Diabolicka TGA
int bytesperpixel;
int lhcsum;
// Diabolickal end
} gltexture_t;
#define MAX_GLTEXTURES 1024
gltexture_t gltextures[MAX_GLTEXTURES];
int numgltextures;
void GL_Bind (int texnum)
{
if (gl_nobind.value)
texnum = char_texture;
if (currenttexture == texnum)
return;
currenttexture = texnum;
#ifdef _WIN32
bindTexFunc (GL_TEXTURE_2D, texnum);
#else
glBindTexture(GL_TEXTURE_2D, texnum);
#endif
}
/*
=============================================================================
scrap allocation
Allocate all the little status bar obejcts into a single texture
to crutch up stupid hardware / drivers
=============================================================================
*/
#define MAX_SCRAPS 2
#define BLOCK_WIDTH 256
#define BLOCK_HEIGHT 256
int scrap_allocated[MAX_SCRAPS][BLOCK_WIDTH];
byte scrap_texels[MAX_SCRAPS][BLOCK_WIDTH*BLOCK_HEIGHT*4];
qboolean scrap_dirty;
int scrap_texnum;
// returns a texture number and the position inside it
int Scrap_AllocBlock (int w, int h, int *x, int *y)
{
int i, j;
int best, best2;
int bestx;
int texnum;
for (texnum=0 ; texnum<MAX_SCRAPS ; texnum++)
{
best = BLOCK_HEIGHT;
for (i=0 ; i<BLOCK_WIDTH-w ; i++)
{
best2 = 0;
for (j=0 ; j<w ; j++)
{
if (scrap_allocated[texnum][i+j] >= best)
break;
if (scrap_allocated[texnum][i+j] > best2)
best2 = scrap_allocated[texnum][i+j];
}
if (j == w)
{ // this is a valid spot
*x = i;
*y = best = best2;
}
}
if (best + h > BLOCK_HEIGHT)
continue;
for (i=0 ; i<w ; i++)
scrap_allocated[texnum][*x + i] = best + h;
return texnum;
}
Sys_Error ("Scrap_AllocBlock: full");
}
int scrap_uploads;
void Scrap_Upload (void)
{
int texnum;
scrap_uploads++;
for (texnum=0 ; texnum<MAX_SCRAPS ; texnum++) {
GL_Bind(scrap_texnum + texnum);
GL_Upload8 (scrap_texels[texnum], BLOCK_WIDTH, BLOCK_HEIGHT, false, true);
}
scrap_dirty = false;
}
//=============================================================================
/* Support Routines */
typedef struct cachepic_s
{
char name[MAX_QPATH];
qpic_t pic;
byte padding[32]; // for appended glpic
} cachepic_t;
#define MAX_CACHED_PICS 128
cachepic_t menu_cachepics[MAX_CACHED_PICS];
int menu_numcachepics;
byte menuplyr_pixels[4096];
int pic_texels;
int pic_count;
qpic_t *Draw_PicFromWad (char *name)
{
qpic_t *p;
glpic_t *gl;
p = W_GetLumpName (name);
gl = (glpic_t *)p->data;
// load little ones into the scrap
if (p->width < 64 && p->height < 64)
{
int x, y;
int i, j, k;
int texnum;
texnum = Scrap_AllocBlock (p->width, p->height, &x, &y);
scrap_dirty = true;
k = 0;
for (i=0 ; i<p->height ; i++)
for (j=0 ; j<p->width ; j++, k++)
scrap_texels[texnum][(y+i)*BLOCK_WIDTH + x + j] = p->data[k];
texnum += scrap_texnum;
gl->texnum = texnum;
gl->sl = (x+0.01)/(float)BLOCK_WIDTH;
gl->sh = (x+p->width-0.01)/(float)BLOCK_WIDTH;
gl->tl = (y+0.01)/(float)BLOCK_WIDTH;
gl->th = (y+p->height-0.01)/(float)BLOCK_WIDTH;
pic_count++;
pic_texels += p->width*p->height;
}
else
{
gl->texnum = GL_LoadPicTexture (p);
gl->sl = 0;
gl->sh = 1;
gl->tl = 0;
gl->th = 1;
}
return p;
}
/*
================
Draw_CachePic
================
*/
qpic_t *Draw_CachePic (char *path)
{
cachepic_t *pic;
int i;
qpic_t *dat;
glpic_t *gl;
for (pic=menu_cachepics, i=0 ; i<menu_numcachepics ; pic++, i++)
if (!strcmp (path, pic->name))
return &pic->pic;
if (menu_numcachepics == MAX_CACHED_PICS)
Sys_Error ("menu_numcachepics == MAX_CACHED_PICS");
menu_numcachepics++;
strcpy (pic->name, path);
//
// load the pic from disk
//
dat = (qpic_t *)COM_LoadTempFile (path);
if (!dat)
Sys_Error ("Draw_CachePic: failed to load %s", path);
SwapPic (dat);
// HACK HACK HACK --- we need to keep the bytes for
// the translatable player picture just for the menu
// configuration dialog
if (!strcmp (path, "gfx/menuplyr.lmp"))
memcpy (menuplyr_pixels, dat->data, dat->width*dat->height);
pic->pic.width = dat->width;
pic->pic.height = dat->height;
gl = (glpic_t *)pic->pic.data;
gl->texnum = GL_LoadPicTexture (dat);
gl->sl = 0;
gl->sh = 1;
gl->tl = 0;
gl->th = 1;
return &pic->pic;
}
void Draw_CharToConback (int num, byte *dest)
{
int row, col;
byte *source;
int drawline;
int x;
row = num>>4;
col = num&15;
source = draw_chars + (row<<10) + (col<<3);
drawline = 8;
while (drawline--)
{
for (x=0 ; x<8 ; x++)
if (source[x] != 255)
dest[x] = 0x60 + source[x];
source += 128;
dest += 320;
}
}
typedef struct
{
char *name;
int minimize, maximize;
} glmode_t;
glmode_t modes[] = {
{"GL_NEAREST", GL_NEAREST, GL_NEAREST},
{"GL_LINEAR", GL_LINEAR, GL_LINEAR},
{"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
{"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
{"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
{"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
};
/*
===============
Draw_TextureMode_f
===============
*/
void Draw_TextureMode_f (void)
{
int i;
gltexture_t *glt;
if (Cmd_Argc() == 1)
{
for (i=0 ; i< 6 ; i++)
if (gl_filter_min == modes[i].minimize)
{
Con_Printf ("%s\n", modes[i].name);
return;
}
Con_Printf ("current filter is unknown???\n");
return;
}
for (i=0 ; i< 6 ; i++)
{
if (!Q_strcasecmp (modes[i].name, Cmd_Argv(1) ) )
break;
}
if (i == 6)
{
Con_Printf ("bad filter name\n");
return;
}
gl_filter_min = modes[i].minimize;
gl_filter_max = modes[i].maximize;
// change all the existing mipmap texture objects
for (i=0, glt=gltextures ; i<numgltextures ; i++, glt++)
{
if (glt->mipmap)
{
GL_Bind (glt->texnum);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
}
}
}
/*
===============
Draw_Init
===============
*/
void Draw_Init (void)
{
int i;
qpic_t *cb;
byte *dest, *src;
int x, y;
char ver[40];
glpic_t *gl;
int start;
byte *ncdata;
int f, fstep;
Cvar_RegisterVariable (&gl_nobind);
Cvar_RegisterVariable (&gl_max_size);
Cvar_RegisterVariable (&gl_picmip);
// 3dfx can only handle 256 wide textures
if (!Q_strncasecmp ((char *)gl_renderer, "3dfx",4) ||
strstr((char *)gl_renderer, "Glide"))
Cvar_Set ("gl_max_size", "256");
Cmd_AddCommand ("gl_texturemode", &Draw_TextureMode_f);
// load the console background and the charset
// by hand, because we need to write the version
// string into the background before turning
// it into a texture
draw_chars = W_GetLumpName ("conchars");
for (i=0 ; i<256*64 ; i++)
if (draw_chars[i] == 0)
draw_chars[i] = 255; // proper transparent color
// now turn them into textures
char_texture = GL_LoadTexture ("charset", 128, 128, draw_chars, false, true, 1);
start = Hunk_LowMark();
cb = (qpic_t *)COM_LoadTempFile ("gfx/conback.lmp");
if (!cb)
Sys_Error ("Couldn't load gfx/conback.lmp");
SwapPic (cb);
// hack the version number directly into the pic
#if defined(__linux__)
sprintf (ver, "(Linux %2.2f, gl %4.2f) %4.2f", (float)LINUX_VERSION, (float)GLQUAKE_VERSION, (float)VERSION);
#else
sprintf (ver, "(gl %4.2f) %4.2f", (float)GLQUAKE_VERSION, (float)VERSION);
#endif
dest = cb->data + 320*186 + 320 - 11 - 8*strlen(ver);
y = strlen(ver);
for (x=0 ; x<y ; x++)
Draw_CharToConback (ver[x], dest+(x<<3));
#if 0
conback->width = vid.conwidth;
conback->height = vid.conheight;
// scale console to vid size
dest = ncdata = Hunk_AllocName(vid.conwidth * vid.conheight, "conback");
for (y=0 ; y<vid.conheight ; y++, dest += vid.conwidth)
{
src = cb->data + cb->width * (y*cb->height/vid.conheight);
if (vid.conwidth == cb->width)
memcpy (dest, src, vid.conwidth);
else
{
f = 0;
fstep = cb->width*0x10000/vid.conwidth;
for (x=0 ; x<vid.conwidth ; x+=4)
{
dest[x] = src[f>>16];
f += fstep;
dest[x+1] = src[f>>16];
f += fstep;
dest[x+2] = src[f>>16];
f += fstep;
dest[x+3] = src[f>>16];
f += fstep;
}
}
}
#else
conback->width = cb->width;
conback->height = cb->height;
ncdata = cb->data;
#endif
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
gl = (glpic_t *)conback->data;
gl->texnum = GL_LoadTexture ("conback", conback->width, conback->height, ncdata, false, false, 1);
gl->sl = 0;
gl->sh = 1;
gl->tl = 0;
gl->th = 1;
conback->width = vid.width;
conback->height = vid.height;
// free loaded console
Hunk_FreeToLowMark(start);
// save a texture slot for translated picture
translate_texture = texture_extension_number++;
// save slots for scraps
scrap_texnum = texture_extension_number;
texture_extension_number += MAX_SCRAPS;
//
// get the other pics we need
//
draw_disc = Draw_PicFromWad ("disc");
draw_backtile = Draw_PicFromWad ("backtile");
}
/*
================
Draw_Character
Draws one 8*8 graphics character with 0 being transparent.
It can be clipped to the top of the screen to allow the console to be
smoothly scrolled off.
================
*/
void Draw_Character (int x, int y, int num)
{
byte *dest;
byte *source;
unsigned short *pusdest;
int drawline;
int row, col;
float frow, fcol, size;
if (num == 32)
return; // space
num &= 255;
if (y <= -8)
return; // totally off screen
row = num>>4;
col = num&15;
frow = row*0.0625;
fcol = col*0.0625;
size = 0.0625;
GL_Bind (char_texture);
glBegin (GL_QUADS);
glTexCoord2f (fcol, frow);
glVertex2f (x, y);
glTexCoord2f (fcol + size, frow);
glVertex2f (x+8, y);
glTexCoord2f (fcol + size, frow + size);
glVertex2f (x+8, y+8);
glTexCoord2f (fcol, frow + size);
glVertex2f (x, y+8);
glEnd ();
}
/*
================
Draw_String
================
*/
void Draw_String (int x, int y, char *str)
{
while (*str)
{
Draw_Character (x, y, *str);
str++;
x += 8;
}
}
/*
================
Draw_DebugChar
Draws a single character directly to the upper right corner of the screen.
This is for debugging lockups by drawing different chars in different parts
of the code.
================
*/
void Draw_DebugChar (char num)
{
}
/*
=============
Draw_AlphaPic
=============
*/
void Draw_AlphaPic (int x, int y, qpic_t *pic, float alpha)
{
byte *dest, *source;
unsigned short *pusdest;
int v, u;
glpic_t *gl;
if (scrap_dirty)
Scrap_Upload ();
gl = (glpic_t *)pic->data;
glDisable(GL_ALPHA_TEST);
glEnable (GL_BLEND);
// glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// glCullFace(GL_FRONT);
glColor4f (1,1,1,alpha);
GL_Bind (gl->texnum);
glBegin (GL_QUADS);
glTexCoord2f (gl->sl, gl->tl);
glVertex2f (x, y);
glTexCoord2f (gl->sh, gl->tl);
glVertex2f (x+pic->width, y);
glTexCoord2f (gl->sh, gl->th);
glVertex2f (x+pic->width, y+pic->height);
glTexCoord2f (gl->sl, gl->th);
glVertex2f (x, y+pic->height);
glEnd ();
glColor4f (1,1,1,1);
glEnable(GL_ALPHA_TEST);
glDisable (GL_BLEND);
}
/*
=============
Draw_Pic
=============
*/
void Draw_Pic (int x, int y, qpic_t *pic)
{
byte *dest, *source;
unsigned short *pusdest;
int v, u;
glpic_t *gl;
if (scrap_dirty)
Scrap_Upload ();
gl = (glpic_t *)pic->data;
glColor4f (1,1,1,1);
GL_Bind (gl->texnum);
glBegin (GL_QUADS);
glTexCoord2f (gl->sl, gl->tl);
glVertex2f (x, y);
glTexCoord2f (gl->sh, gl->tl);
glVertex2f (x+pic->width, y);
glTexCoord2f (gl->sh, gl->th);
glVertex2f (x+pic->width, y+pic->height);
glTexCoord2f (gl->sl, gl->th);
glVertex2f (x, y+pic->height);
glEnd ();
}
/*
=============
Draw_TransPic
=============
*/
void Draw_TransPic (int x, int y, qpic_t *pic)
{
byte *dest, *source, tbyte;
unsigned short *pusdest;
int v, u;
if (x < 0 || (unsigned)(x + pic->width) > vid.width || y < 0 ||
(unsigned)(y + pic->height) > vid.height)
{
Sys_Error ("Draw_TransPic: bad coordinates");
}
Draw_Pic (x, y, pic);
}
/*
=============
Draw_TransPicTranslate
Only used for the player color selection menu
=============
*/
void Draw_TransPicTranslate (int x, int y, qpic_t *pic, byte *translation)
{
int v, u, c;
unsigned trans[64*64], *dest;
byte *src;
int p;
GL_Bind (translate_texture);
c = pic->width * pic->height;
dest = trans;
for (v=0 ; v<64 ; v++, dest += 64)
{
src = &menuplyr_pixels[ ((v*pic->height)>>6) *pic->width];
for (u=0 ; u<64 ; u++)
{
p = src[(u*pic->width)>>6];
if (p == 255)
dest[u] = p;
else
dest[u] = d_8to24table[translation[p]];
}
}
glTexImage2D (GL_TEXTURE_2D, 0, gl_alpha_format, 64, 64, 0, GL_RGBA, GL_UNSIGNED_BYTE, trans);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glColor3f (1,1,1);
glBegin (GL_QUADS);
glTexCoord2f (0, 0);
glVertex2f (x, y);
glTexCoord2f (1, 0);
glVertex2f (x+pic->width, y);
glTexCoord2f (1, 1);
glVertex2f (x+pic->width, y+pic->height);
glTexCoord2f (0, 1);
glVertex2f (x, y+pic->height);
glEnd ();
}
/*
================
Draw_ConsoleBackground
================
*/
void Draw_ConsoleBackground (int lines)
{
int y = (vid.height * 3) >> 2;
if (lines > y)
Draw_Pic(0, lines - vid.height, conback);
else
Draw_AlphaPic (0, lines - vid.height, conback, (float)(1.2 * lines)/y);
}
/*
=============
Draw_TileClear
This repeats a 64*64 tile graphic to fill the screen around a sized down
refresh window.
=============
*/
void Draw_TileClear (int x, int y, int w, int h)
{
glColor3f (1,1,1);
GL_Bind (*(int *)draw_backtile->data);
glBegin (GL_QUADS);
glTexCoord2f (x/64.0, y/64.0);
glVertex2f (x, y);
glTexCoord2f ( (x+w)/64.0, y/64.0);
glVertex2f (x+w, y);
glTexCoord2f ( (x+w)/64.0, (y+h)/64.0);
glVertex2f (x+w, y+h);
glTexCoord2f ( x/64.0, (y+h)/64.0 );
glVertex2f (x, y+h);
glEnd ();
}
/*
=============
Draw_Fill
Fills a box of pixels with a single color
=============
*/
void Draw_Fill (int x, int y, int w, int h, int c)
{
glDisable (GL_TEXTURE_2D);
glColor3f (host_basepal[c*3]/255.0,
host_basepal[c*3+1]/255.0,
host_basepal[c*3+2]/255.0);
glBegin (GL_QUADS);
glVertex2f (x,y);
glVertex2f (x+w, y);
glVertex2f (x+w, y+h);
glVertex2f (x, y+h);
glEnd ();
glColor3f (1,1,1);
glEnable (GL_TEXTURE_2D);
}
//=============================================================================
/*
================
Draw_FadeScreen
================
*/
void Draw_FadeScreen (void)
{
glEnable (GL_BLEND);
glDisable (GL_TEXTURE_2D);
glColor4f (0, 0, 0, 0.8);
glBegin (GL_QUADS);
glVertex2f (0,0);
glVertex2f (vid.width, 0);
glVertex2f (vid.width, vid.height);
glVertex2f (0, vid.height);
glEnd ();
glColor4f (1,1,1,1);
glEnable (GL_TEXTURE_2D);
glDisable (GL_BLEND);
Sbar_Changed();
}
//=============================================================================
/*
================
Draw_BeginDisc
Draws the little blue disc in the corner of the screen.
Call before beginning any disc IO.
================
*/
void Draw_BeginDisc (void)
{
if (!draw_disc)
return;
glDrawBuffer (GL_FRONT);
Draw_Pic (vid.width - 24, 0, draw_disc);
glDrawBuffer (GL_BACK);
}
/*
================
Draw_EndDisc
Erases the disc icon.
Call after completing any disc IO
================
*/
void Draw_EndDisc (void)
{
}
/*
================
GL_Set2D
Setup as if the screen was 320*200
================
*/
void GL_Set2D (void)
{
glViewport (glx, gly, glwidth, glheight);
glMatrixMode(GL_PROJECTION);
glLoadIdentity ();
glOrtho (0, vid.width, vid.height, 0, -99999, 99999);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity ();
glDisable (GL_DEPTH_TEST);
glDisable (GL_CULL_FACE);
glDisable (GL_BLEND);
glEnable (GL_ALPHA_TEST);
// glDisable (GL_ALPHA_TEST);
glColor4f (1,1,1,1);
}
//====================================================================
/*
================
GL_FindTexture
================
*/
int GL_FindTexture (char *identifier)
{
int i;
gltexture_t *glt;
for (i=0, glt=gltextures ; i<numgltextures ; i++, glt++)
{
if (!strcmp (identifier, glt->identifier))
return gltextures[i].texnum;
}
return -1;
}
/*
================
GL_ResampleTexture
================
*/
void GL_ResampleTexture (unsigned *in, int inwidth, int inheight, unsigned *out, int outwidth, int outheight)
{
int i, j;
unsigned *inrow;
unsigned frac, fracstep;
fracstep = inwidth*0x10000/outwidth;
for (i=0 ; i<outheight ; i++, out += outwidth)
{
inrow = in + inwidth*(i*inheight/outheight);
frac = fracstep >> 1;
for (j=0 ; j<outwidth ; j+=4)
{
out[j] = inrow[frac>>16];
frac += fracstep;
out[j+1] = inrow[frac>>16];
frac += fracstep;
out[j+2] = inrow[frac>>16];
frac += fracstep;
out[j+3] = inrow[frac>>16];
frac += fracstep;
}
}
}
/*
================
GL_Resample8BitTexture -- JACK
================
*/
void GL_Resample8BitTexture (unsigned char *in, int inwidth, int inheight, unsigned char *out, int outwidth, int outheight)
{
int i, j;
unsigned char *inrow;
unsigned frac, fracstep;
fracstep = inwidth*0x10000/outwidth;
for (i=0 ; i<outheight ; i++, out += outwidth)
{
inrow = in + inwidth*(i*inheight/outheight);
frac = fracstep >> 1;
for (j=0 ; j<outwidth ; j+=4)
{
out[j] = inrow[frac>>16];
frac += fracstep;
out[j+1] = inrow[frac>>16];
frac += fracstep;
out[j+2] = inrow[frac>>16];
frac += fracstep;
out[j+3] = inrow[frac>>16];
frac += fracstep;
}
}
}
/*
================
GL_MipMap
Operates in place, quartering the size of the texture
================
*/
void GL_MipMap (byte *in, int width, int height)
{
int i, j;
byte *out;
width <<=2;
height >>= 1;
out = in;
for (i=0 ; i<height ; i++, in+=width)
{
for (j=0 ; j<width ; j+=8, out+=4, in+=8)
{
out[0] = (in[0] + in[4] + in[width+0] + in[width+4])>>2;
out[1] = (in[1] + in[5] + in[width+1] + in[width+5])>>2;
out[2] = (in[2] + in[6] + in[width+2] + in[width+6])>>2;
out[3] = (in[3] + in[7] + in[width+3] + in[width+7])>>2;
}
}
}
/*
================
GL_MipMap8Bit
Mipping for 8 bit textures
================
*/
void GL_MipMap8Bit (byte *in, int width, int height)
{
int i, j;
unsigned short r,g,b;
byte *out, *at1, *at2, *at3, *at4;
// width <<=2;
height >>= 1;
out = in;
for (i=0 ; i<height ; i++, in+=width)
{
for (j=0 ; j<width ; j+=2, out+=1, in+=2)
{
at1 = (byte *) (d_8to24table + in[0]);
at2 = (byte *) (d_8to24table + in[1]);
at3 = (byte *) (d_8to24table + in[width+0]);
at4 = (byte *) (d_8to24table + in[width+1]);
r = (at1[0]+at2[0]+at3[0]+at4[0]); r>>=5;
g = (at1[1]+at2[1]+at3[1]+at4[1]); g>>=5;
b = (at1[2]+at2[2]+at3[2]+at4[2]); b>>=5;
out[0] = d_15to8table[(r<<0) + (g<<5) + (b<<10)];
}
}
}
/*
===============
GL_Upload32
===============
*/
void GL_Upload32 (unsigned *data, int width, int height, qboolean mipmap, qboolean alpha)
{
int samples;
static unsigned scaled[1024*512]; // [512*256];
int scaled_width, scaled_height;
for (scaled_width = 1 ; scaled_width < width ; scaled_width<<=1)
;
for (scaled_height = 1 ; scaled_height < height ; scaled_height<<=1)
;
scaled_width >>= (int)gl_picmip.value;
scaled_height >>= (int)gl_picmip.value;
if (scaled_width > gl_max_size.value)
scaled_width = gl_max_size.value;
if (scaled_height > gl_max_size.value)
scaled_height = gl_max_size.value;
if (scaled_width * scaled_height > sizeof(scaled)/4)
Sys_Error ("GL_LoadTexture: too big");
samples = alpha ? gl_alpha_format : gl_solid_format;
#if 0
if (mipmap)
gluBuild2DMipmaps (GL_TEXTURE_2D, samples, width, height, GL_RGBA, GL_UNSIGNED_BYTE, trans);
else if (scaled_width == width && scaled_height == height)
glTexImage2D (GL_TEXTURE_2D, 0, samples, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, trans);
else
{
gluScaleImage (GL_RGBA, width, height, GL_UNSIGNED_BYTE, trans,
scaled_width, scaled_height, GL_UNSIGNED_BYTE, scaled);
glTexImage2D (GL_TEXTURE_2D, 0, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
}
#else
texels += scaled_width * scaled_height;
if (scaled_width == width && scaled_height == height)
{
if (!mipmap)
{
glTexImage2D (GL_TEXTURE_2D, 0, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
goto done;
}
memcpy (scaled, data, width*height*4);
}
else
GL_ResampleTexture (data, width, height, scaled, scaled_width, scaled_height);
glTexImage2D (GL_TEXTURE_2D, 0, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
if (mipmap)
{
int miplevel;
miplevel = 0;
while (scaled_width > 1 || scaled_height > 1)
{
GL_MipMap ((byte *)scaled, scaled_width, scaled_height);
scaled_width >>= 1;
scaled_height >>= 1;
if (scaled_width < 1)
scaled_width = 1;
if (scaled_height < 1)
scaled_height = 1;
miplevel++;
glTexImage2D (GL_TEXTURE_2D, miplevel, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
}
}
done: ;
#endif
if (mipmap)
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
}
else
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_max);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
}
}
void GL_Upload8_EXT (byte *data, int width, int height, qboolean mipmap, qboolean alpha)
{
int i, s;
qboolean noalpha;
int p;
static unsigned j;
int samples;
static unsigned char scaled[1024*512]; // [512*256];
int scaled_width, scaled_height;
s = width*height;
// if there are no transparent pixels, make it a 3 component
// texture even if it was specified as otherwise
if (alpha)
{
noalpha = true;
for (i=0 ; i<s ; i++)
{
if (data[i] == 255)
noalpha = false;
}
if (alpha && noalpha)
alpha = false;
}
for (scaled_width = 1 ; scaled_width < width ; scaled_width<<=1)
;
for (scaled_height = 1 ; scaled_height < height ; scaled_height<<=1)
;
scaled_width >>= (int)gl_picmip.value;
scaled_height >>= (int)gl_picmip.value;
if (scaled_width > gl_max_size.value)
scaled_width = gl_max_size.value;
if (scaled_height > gl_max_size.value)
scaled_height = gl_max_size.value;
if (scaled_width * scaled_height > sizeof(scaled))
Sys_Error ("GL_LoadTexture: too big");
samples = 1; // alpha ? gl_alpha_format : gl_solid_format;
texels += scaled_width * scaled_height;
if (scaled_width == width && scaled_height == height)
{
if (!mipmap)
{
glTexImage2D (GL_TEXTURE_2D, 0, GL_COLOR_INDEX8_EXT, scaled_width, scaled_height, 0, GL_COLOR_INDEX , GL_UNSIGNED_BYTE, data);
goto done;
}
memcpy (scaled, data, width*height);
}
else
GL_Resample8BitTexture (data, width, height, scaled, scaled_width, scaled_height);
glTexImage2D (GL_TEXTURE_2D, 0, GL_COLOR_INDEX8_EXT, scaled_width, scaled_height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, scaled);
if (mipmap)
{
int miplevel;
miplevel = 0;
while (scaled_width > 1 || scaled_height > 1)
{
GL_MipMap8Bit ((byte *)scaled, scaled_width, scaled_height);
scaled_width >>= 1;
scaled_height >>= 1;
if (scaled_width < 1)
scaled_width = 1;
if (scaled_height < 1)
scaled_height = 1;
miplevel++;
glTexImage2D (GL_TEXTURE_2D, miplevel, GL_COLOR_INDEX8_EXT, scaled_width, scaled_height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, scaled);
}
}
done: ;
if (mipmap)
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
}
else
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_max);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
}
}
/*
===============
GL_Upload8
===============
*/
void GL_Upload8 (byte *data, int width, int height, qboolean mipmap, qboolean alpha)
{
static unsigned trans[640*480]; // FIXME, temporary
int i, s;
qboolean noalpha;
int p;
s = width*height;
// if there are no transparent pixels, make it a 3 component
// texture even if it was specified as otherwise
if (alpha)
{
noalpha = true;
for (i=0 ; i<s ; i++)
{
p = data[i];
if (p == 255)
noalpha = false;
trans[i] = d_8to24table[p];
}
if (alpha && noalpha)
alpha = false;
}
else
{
if (s&3)
Sys_Error ("GL_Upload8: s&3");
for (i=0 ; i<s ; i+=4)
{
trans[i] = d_8to24table[data[i]];
trans[i+1] = d_8to24table[data[i+1]];
trans[i+2] = d_8to24table[data[i+2]];
trans[i+3] = d_8to24table[data[i+3]];
}
}
if (VID_Is8bit() && !alpha && (data!=scrap_texels[0])) {
GL_Upload8_EXT (data, width, height, mipmap, alpha);
return;
}
GL_Upload32 (trans, width, height, mipmap, alpha);
}
/*
================
GL_LoadTexture
================
*/
/*
int GL_LoadTexture (char *identifier, int width, int height, byte *data, qboolean mipmap, qboolean alpha, int bytesperpixel)
{
static int checksum_table[256];
qboolean noalpha;
int i, p, s, checksum;
gltexture_t *glt;
checksum = 0;
s = width*height*bytesperpixel;
for (i = 0;i < 256;i++)
checksum_table[i] = i + 1;
for (i = 0;i < s;i++)
checksum += (checksum_table[data[i] & 255]++);
// see if the texture is allready present
if (identifier[0])
{
for (i=0, glt=gltextures ; i<numgltextures ; i++, glt++)
{
if (!strcmp (identifier, glt->identifier))
{
if(checksum != glt->checksum)
goto GL_LoadTexture_setup;
if (width != glt->width || height != glt->height)
goto GL_LoadTexture_setup;
return gltextures[i].texnum;
}
}
}
glt = &gltextures[numgltextures];
numgltextures++;
strcpy (glt->identifier, identifier);
glt->texnum = texture_extension_number;
texture_extension_number++;
GL_LoadTexture_setup:
glt->checksum = checksum;
glt->width = width;
glt->height = height;
glt->mipmap = mipmap;
GL_Bind(glt->texnum);
GL_Upload8 (data, width, height, mipmap, alpha);
return glt->texnum;
}
*/
//Diabolickal TGA Begin
int lhcsumtable[256];
int GL_LoadTexture (char *identifier, int width, int height, byte *data, qboolean mipmap, qboolean alpha, int bytesperpixel)
{
qboolean noalpha;
int i, p, s, lhcsum;
gltexture_t *glt;
// occurances. well this isn't exactly a checksum, it's better than that but
// not following any standards.
lhcsum = 0;
s = width*height*bytesperpixel;
for (i = 0;i < 256;i++) lhcsumtable[i] = i + 1;
for (i = 0;i < s;i++) lhcsum += (lhcsumtable[data[i] & 255]++);
// see if the texture is allready present
if (identifier[0])
{
for (i=0, glt=gltextures ; i < numgltextures ; i++, glt++)
{
if (!strcmp (identifier, glt->identifier))
{
if (lhcsum != glt->lhcsum || width != glt->width || height != glt->height)
{
Con_DPrintf("GL_LoadTexture: cache mismatch\n");
goto GL_LoadTexture_setup;
}
return glt->texnum;
}
}
}
// whoever at id or threewave must've been half asleep...
glt = &gltextures[numgltextures];
numgltextures++;
strcpy (glt->identifier, identifier);
glt->texnum = texture_extension_number;
texture_extension_number++;
GL_LoadTexture_setup:
glt->checksum = lhcsum;
glt->width = width;
glt->height = height;
glt->mipmap = mipmap;
glt->bytesperpixel = bytesperpixel;
if (!isDedicated)
{
GL_Bind(glt->texnum);
if (bytesperpixel == 1)
GL_Upload8 (data, width, height, mipmap, alpha);
else if (bytesperpixel == 4)
GL_Upload32 ((unsigned*)data, width, height, mipmap, true);
else
Sys_Error("GL_LoadTexture: unknown bytesperpixel\n");
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
}
return glt->texnum;
}
//Diabolickal TGA End
/****************************************/
//Diabolickal HLBSP start
byte vid_gamma_table[256];
void Build_Gamma_Table (void) {
int i;
float inf;
float in_gamma;
if ((i = COM_CheckParm("-gamma")) != 0 && i+1 < com_argc) {
in_gamma = Q_atof(com_argv[i+1]);
if (in_gamma < 0.3) in_gamma = 0.3;
if (in_gamma > 1) in_gamma = 1.0;
} else {
in_gamma = 1;
}
if (in_gamma != 1) {
for (i=0 ; i<256 ; i++) {
inf = min(255 * pow((i + 0.5) / 255.5, in_gamma) + 0.5, 255);
vid_gamma_table[i] = inf;
}
} else {
for (i=0 ; i<256 ; i++)
vid_gamma_table[i] = i;
}
}
/*
================
GL_LoadTexture32
================
*/
int GL_LoadTexture32 (char *identifier, int width, int height, byte *data, qboolean mipmap, qboolean alpha)
{
qboolean noalpha;
int i, p, s;
gltexture_t *glt;
int image_size = width * height;
// see if the texture is already present
if (identifier[0])
{
for (i=0, glt=gltextures ; i<numgltextures ; i++, glt++)
{
if (!strcmp (identifier, glt->identifier))
{
if (width != glt->width || height != glt->height)
Sys_Error ("GL_LoadTexture: cache mismatch");
return gltextures[i].texnum;
}
}
}
else {
glt = &gltextures[numgltextures];
numgltextures++;
}
strcpy (glt->identifier, identifier);
glt->texnum = texture_extension_number;
glt->width = width;
glt->height = height;
glt->mipmap = mipmap;
GL_Bind(texture_extension_number );
#if 1
// Baker: this applies our -gamma parameter table
if (1) {
//extern byte vid_gamma_table[256];
for (i = 0; i < image_size; i++){
data[4 * i] = vid_gamma_table[data[4 * i]];
data[4 * i + 1] = vid_gamma_table[data[4 * i + 1]];
data[4 * i + 2] = vid_gamma_table[data[4 * i + 2]];
}
}
#endif
GL_Upload32 ((unsigned *)data, width, height, mipmap, alpha);
texture_extension_number++;
return texture_extension_number-1;
}
//Diabolickal End
/*
================
GL_LoadPicTexture
================
*/
int GL_LoadPicTexture (qpic_t *pic)
{
return GL_LoadTexture ("", pic->width, pic->height, pic->data, false, true, 1);
}
/****************************************/
static GLenum oldtarget = 0;
float gVertexBuffer[VERTEXARRAYSIZE];
float gColorBuffer[VERTEXARRAYSIZE];
float gTexCoordBuffer[VERTEXARRAYSIZE];
void GL_SelectTexture (GLenum target)
{
if (!gl_mtexable)
return;
qglSelectTextureSGIS(target);
if (target == oldtarget)
return;
cnttextures[oldtarget-TEXTURE0_SGIS] = currenttexture;
currenttexture = cnttextures[target-TEXTURE0_SGIS];
oldtarget = target;
}
//Diabolickal TGA Begin
int image_width;
int image_height;
#define IMAGE_MAX_DIMENSIONS 512
/*
=================================================================
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;
/*
============
LoadPCX
============
*/
byte* LoadPCX (FILE *f, int matchwidth, int matchheight)
{
pcx_t *pcx, pcxbuf;
byte palette[768];
byte *pix, *image_rgba;
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 >= 514
|| pcx->ymax >= 514)
{
Con_Printf ("Bad pcx file\n");
return NULL;
}
if (matchwidth && (pcx->xmax+1) != matchwidth)
return NULL;
if (matchheight && (pcx->ymax+1) != matchheight)
return NULL;
// 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);
image_rgba = (byte*)malloc( count * 4);
for (y=0 ; y<=pcx->ymax ; y++)
{
pix = image_rgba + 4*y*(pcx->xmax+1);
for (x=0 ; x<=pcx->xmax ; ) // muff - fixed - was referencing 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++;
}
}
}
image_width = pcx->xmax+1;
image_height = pcx->ymax+1;
return image_rgba;
}
/*
=========================================================
Targa
=========================================================
*/
#define TGA_MAXCOLORS 16384
/* Definitions for image types. */
#define TGA_Null 0 /* no image data */
#define TGA_Map 1 /* Uncompressed, color-mapped images. */
#define TGA_RGB 2 /* Uncompressed, RGB images. */
#define TGA_Mono 3 /* Uncompressed, black and white images. */
#define TGA_RLEMap 9 /* Runlength encoded color-mapped images. */
#define TGA_RLERGB 10 /* Runlength encoded RGB images. */
#define TGA_RLEMono 11 /* Compressed, black and white images. */
#define TGA_CompMap 32 /* Compressed color-mapped data, using Huffman, Delta, and runlength encoding. */
#define TGA_CompMap4 33 /* Compressed color-mapped data, using Huffman, Delta, and runlength encoding. 4-pass quadtree-type process. */
/* Definitions for interleave flag. */
#define TGA_IL_None 0 /* non-interleaved. */
#define TGA_IL_Two 1 /* two-way (even/odd) interleaving */
#define TGA_IL_Four 2 /* four way interleaving */
#define TGA_IL_Reserved 3 /* reserved */
/* Definitions for origin flag */
#define TGA_O_UPPER 0 /* Origin in lower left-hand corner. */
#define TGA_O_LOWER 1 /* Origin in upper left-hand corner. */
typedef struct _TargaHeader
{
unsigned char id_length, colormap_type, image_type;
unsigned short colormap_index, colormap_length;
unsigned char colormap_size;
unsigned short x_origin, y_origin, width, height;
unsigned char pixel_size, attributes;
} TargaHeader;
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);
}
/*
=============
LoadTGA
=============
*/
byte *LoadTGA (FILE *fin, int matchwidth, int matchheight)
{
int w, h, x, y, realrow, truerow, baserow, i, temp1, temp2, pixel_size, map_idx;
int RLE_count, RLE_flag, size, interleave, origin;
qboolean mapped, rlencoded;
byte *data, *dst, r, g, b, a, j, k, l, *ColorMap;
TargaHeader header;
header.id_length = fgetc (fin);
header.colormap_type = fgetc (fin);
header.image_type = fgetc (fin);
header.colormap_index = fgetLittleShort (fin);
header.colormap_length = fgetLittleShort (fin);
header.colormap_size = fgetc (fin);
header.x_origin = fgetLittleShort (fin);
header.y_origin = fgetLittleShort (fin);
header.width = fgetLittleShort (fin);
header.height = fgetLittleShort (fin);
header.pixel_size = fgetc (fin);
header.attributes = fgetc (fin);
if (header.width > IMAGE_MAX_DIMENSIONS || header.height > IMAGE_MAX_DIMENSIONS)
{
Con_DPrintf ("TGA image %s exceeds maximum supported dimensions\n", fin);
fclose (fin);
return NULL;
}
if ((matchwidth && header.width != matchwidth) || (matchheight && header.height != matchheight))
{
fclose (fin);
return NULL;
}
if (header.id_length != 0)
fseek (fin, header.id_length, SEEK_CUR);
/* validate TGA type */
switch (header.image_type)
{
case TGA_Map:
case TGA_RGB:
case TGA_Mono:
case TGA_RLEMap:
case TGA_RLERGB:
case TGA_RLEMono:
break;
default:
Con_DPrintf ("Unsupported TGA image %s: Only type 1 (map), 2 (RGB), 3 (mono), 9 (RLEmap), 10 (RLERGB), 11 (RLEmono) TGA images supported\n");
fclose (fin);
return NULL;
}
/* validate color depth */
switch (header.pixel_size)
{
case 8:
case 15:
case 16:
case 24:
case 32:
break;
default:
Con_DPrintf ("Unsupported TGA image %s: Only 8, 15, 16, 24 or 32 bit images (with colormaps) supported\n");
fclose (fin);
return NULL;
}
r = g = b = a = l = 0;
/* if required, read the color map information. */
ColorMap = NULL;
mapped = (header.image_type == TGA_Map || header.image_type == TGA_RLEMap) && header.colormap_type == 1;
if (mapped)
{
/* validate colormap size */
switch (header.colormap_size)
{
case 8:
case 15:
case 16:
case 32:
case 24:
break;
default:
Con_DPrintf ("Unsupported TGA image %s: Only 8, 15, 16, 24 or 32 bit colormaps supported\n");
fclose (fin);
return NULL;
}
temp1 = header.colormap_index;
temp2 = header.colormap_length;
if ((temp1 + temp2 + 1) >= TGA_MAXCOLORS)
{
fclose (fin);
return NULL;
}
ColorMap = (byte*)(malloc (TGA_MAXCOLORS * 4));
map_idx = 0;
for (i = temp1 ; i < temp1 + temp2 ; ++i, map_idx += 4)
{
/* read appropriate number of bytes, break into rgb & put in map. */
switch (header.colormap_size)
{
case 8: /* grey scale, read and triplicate. */
r = g = b = getc (fin);
a = 255;
break;
case 15: /* 5 bits each of red green and blue. */
/* watch byte order. */
j = getc (fin);
k = getc (fin);
l = ((unsigned int)k << 8) + j;
r = (byte)(((k & 0x7C) >> 2) << 3);
g = (byte)((((k & 0x03) << 3) + ((j & 0xE0) >> 5)) << 3);
b = (byte)((j & 0x1F) << 3);
a = 255;
break;
case 16: /* 5 bits each of red green and blue, 1 alpha bit. */
/* watch byte order. */
j = getc (fin);
k = getc (fin);
l = ((unsigned int)k << 8) + j;
r = (byte)(((k & 0x7C) >> 2) << 3);
g = (byte)((((k & 0x03) << 3) + ((j & 0xE0) >> 5)) << 3);
b = (byte)((j & 0x1F) << 3);
a = (k & 0x80) ? 255 : 0;
break;
case 24: /* 8 bits each of blue, green and red. */
b = getc (fin);
g = getc (fin);
r = getc (fin);
a = 255;
l = 0;
break;
case 32: /* 8 bits each of blue, green, red and alpha. */
b = getc (fin);
g = getc (fin);
r = getc (fin);
a = getc (fin);
l = 0;
break;
}
ColorMap[map_idx+0] = r;
ColorMap[map_idx+1] = g;
ColorMap[map_idx+2] = b;
ColorMap[map_idx+3] = a;
}
}
/* check run-length encoding. */
rlencoded = (header.image_type == TGA_RLEMap || header.image_type == TGA_RLERGB || header.image_type == TGA_RLEMono);
RLE_count = RLE_flag = 0;
image_width = w = header.width;
image_height = h = header.height;
size = w * h * 4;
data = (byte*)(calloc (size, 1));
/* read the Targa file body and convert to portable format. */
pixel_size = header.pixel_size;
origin = (header.attributes & 0x20) >> 5;
interleave = (header.attributes & 0xC0) >> 6;
truerow = baserow = 0;
for (y=0 ; y<h ; y++)
{
realrow = truerow;
if (origin == TGA_O_UPPER)
realrow = h - realrow - 1;
dst = data + realrow * w * 4;
for (x=0 ; x<w ; x++)
{
/* check if run length encoded. */
if (rlencoded)
{
if (!RLE_count)
{
/* have to restart run. */
i = getc (fin);
RLE_flag = (i & 0x80);
if (!RLE_flag) // stream of unencoded pixels
RLE_count = i + 1;
else // single pixel replicated
RLE_count = i - 127;
/* decrement count & get pixel. */
--RLE_count;
}
else
{
/* have already read count & (at least) first pixel. */
--RLE_count;
if (RLE_flag)
/* replicated pixels. */
goto PixEncode;
}
}
/* read appropriate number of bytes, break into RGB. */
switch (pixel_size)
{
case 8: /* grey scale, read and triplicate. */
r = g = b = l = getc (fin);
a = 255;
break;
case 15: /* 5 bits each of red green and blue. */
/* watch byte order. */
j = getc (fin);
k = getc (fin);
l = ((unsigned int)k << 8) + j;
r = (byte)(((k & 0x7C) >> 2) << 3);
g = (byte)((((k & 0x03) << 3) + ((j & 0xE0) >> 5)) << 3);
b = (byte)((j & 0x1F) << 3);
a = 255;
break;
case 16: /* 5 bits each of red green and blue, 1 alpha bit. */
/* watch byte order. */
j = getc (fin);
k = getc (fin);
l = ((unsigned int)k << 8) + j;
r = (byte)(((k & 0x7C) >> 2) << 3);
g = (byte)((((k & 0x03) << 3) + ((j & 0xE0) >> 5)) << 3);
b = (byte)((j & 0x1F) << 3);
a = (k & 0x80) ? 255 : 0;
break;
case 24: /* 8 bits each of blue, green and red. */
b = getc (fin);
g = getc (fin);
r = getc (fin);
a = 255;
l = 0;
break;
case 32: /* 8 bits each of blue, green, red and alpha. */
b = getc (fin);
g = getc (fin);
r = getc (fin);
a = getc (fin);
l = 0;
break;
default:
Con_DPrintf ("Malformed TGA image: Illegal pixel_size '%d'\n", pixel_size);
fclose (fin);
free (data);
if (mapped)
free (ColorMap);
return NULL;
}
PixEncode:
if (mapped)
{
map_idx = l * 4;
*dst++ = ColorMap[map_idx+0];
*dst++ = ColorMap[map_idx+1];
*dst++ = ColorMap[map_idx+2];
*dst++ = ColorMap[map_idx+3];
}
else
{
*dst++ = r;
*dst++ = g;
*dst++ = b;
*dst++ = a;
}
}
if (interleave == TGA_IL_Four)
truerow += 4;
else if (interleave == TGA_IL_Two)
truerow += 2;
else
truerow++;
if (truerow >= h)
truerow = ++baserow;
}
if (mapped)
free (ColorMap);
fclose (fin);
return data;
}
byte* loadimagepixels (char* filename, qboolean complain, int matchwidth, int matchheight)
{
FILE *f;
char basename[128], name[128];
byte *image_rgba, *c;
COM_StripExtension(filename, basename); // strip the extension to allow TGA
c = (byte*)basename;
while (*c)
{
if (*c == '*')
*c = '+';
c++;
}
//Try TGA
sprintf (name, "%s.tga", basename);
COM_FOpenFile (name, &f);
if (f)
return LoadTGA (f, matchwidth, matchheight);
//Try PCX
sprintf (name, "%s.pcx", basename);
COM_FOpenFile (name, &f);
if (f)
return LoadPCX (f, matchwidth, matchheight);
if (complain)
Con_Printf ("Couldn't load %s.tga or %s.pcx \n", filename);
return NULL;
}
int loadtextureimage (char* filename, int matchwidth, int matchheight, qboolean complain, qboolean mipmap)
{
int texnum;
byte *data;
if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
return 0;
texnum = GL_LoadTexture (filename, image_width, image_height, data, mipmap, qtrue, 4);
free(data);
return texnum;
}
// Tomaz || TGA End
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