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quake2/ref_gl/gl_image.c

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as released 2001-12-22
2001-12-22 00:00:00 +00:00
/*
Copyright (C) 1997-2001 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.
*/
#include "gl_local.h"
image_t gltextures[MAX_GLTEXTURES];
int numgltextures;
int base_textureid; // gltextures[i] = base_textureid+i
static byte intensitytable[256];
static unsigned char gammatable[256];
cvar_t *intensity;
unsigned d_8to24table[256];
qboolean GL_Upload8 (byte *data, int width, int height, qboolean mipmap, qboolean is_sky );
qboolean GL_Upload32 (unsigned *data, int width, int height, qboolean mipmap);
int gl_solid_format = 3;
int gl_alpha_format = 4;
int gl_tex_solid_format = 3;
int gl_tex_alpha_format = 4;
int gl_filter_min = GL_LINEAR_MIPMAP_NEAREST;
int gl_filter_max = GL_LINEAR;
void GL_SetTexturePalette( unsigned palette[256] )
{
int i;
unsigned char temptable[768];
if ( qglColorTableEXT && gl_ext_palettedtexture->value )
{
for ( i = 0; i < 256; i++ )
{
temptable[i*3+0] = ( palette[i] >> 0 ) & 0xff;
temptable[i*3+1] = ( palette[i] >> 8 ) & 0xff;
temptable[i*3+2] = ( palette[i] >> 16 ) & 0xff;
}
qglColorTableEXT( GL_SHARED_TEXTURE_PALETTE_EXT,
GL_RGB,
256,
GL_RGB,
GL_UNSIGNED_BYTE,
temptable );
}
}
void GL_EnableMultitexture( qboolean enable )
{
if ( !qglSelectTextureSGIS && !qglActiveTextureARB )
return;
if ( enable )
{
GL_SelectTexture( GL_TEXTURE1 );
qglEnable( GL_TEXTURE_2D );
GL_TexEnv( GL_REPLACE );
}
else
{
GL_SelectTexture( GL_TEXTURE1 );
qglDisable( GL_TEXTURE_2D );
GL_TexEnv( GL_REPLACE );
}
GL_SelectTexture( GL_TEXTURE0 );
GL_TexEnv( GL_REPLACE );
}
void GL_SelectTexture( GLenum texture )
{
int tmu;
if ( !qglSelectTextureSGIS && !qglActiveTextureARB )
return;
if ( texture == GL_TEXTURE0 )
{
tmu = 0;
}
else
{
tmu = 1;
}
if ( tmu == gl_state.currenttmu )
{
return;
}
gl_state.currenttmu = tmu;
if ( qglSelectTextureSGIS )
{
qglSelectTextureSGIS( texture );
}
else if ( qglActiveTextureARB )
{
qglActiveTextureARB( texture );
qglClientActiveTextureARB( texture );
}
}
void GL_TexEnv( GLenum mode )
{
static int lastmodes[2] = { -1, -1 };
if ( mode != lastmodes[gl_state.currenttmu] )
{
qglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, mode );
lastmodes[gl_state.currenttmu] = mode;
}
}
void GL_Bind (int texnum)
{
extern image_t *draw_chars;
if (gl_nobind->value && draw_chars) // performance evaluation option
texnum = draw_chars->texnum;
if ( gl_state.currenttextures[gl_state.currenttmu] == texnum)
return;
gl_state.currenttextures[gl_state.currenttmu] = texnum;
qglBindTexture (GL_TEXTURE_2D, texnum);
}
void GL_MBind( GLenum target, int texnum )
{
GL_SelectTexture( target );
if ( target == GL_TEXTURE0 )
{
if ( gl_state.currenttextures[0] == texnum )
return;
}
else
{
if ( gl_state.currenttextures[1] == texnum )
return;
}
GL_Bind( texnum );
}
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}
};
#define NUM_GL_MODES (sizeof(modes) / sizeof (glmode_t))
typedef struct
{
char *name;
int mode;
} gltmode_t;
gltmode_t gl_alpha_modes[] = {
{"default", 4},
{"GL_RGBA", GL_RGBA},
{"GL_RGBA8", GL_RGBA8},
{"GL_RGB5_A1", GL_RGB5_A1},
{"GL_RGBA4", GL_RGBA4},
{"GL_RGBA2", GL_RGBA2},
};
#define NUM_GL_ALPHA_MODES (sizeof(gl_alpha_modes) / sizeof (gltmode_t))
gltmode_t gl_solid_modes[] = {
{"default", 3},
{"GL_RGB", GL_RGB},
{"GL_RGB8", GL_RGB8},
{"GL_RGB5", GL_RGB5},
{"GL_RGB4", GL_RGB4},
{"GL_R3_G3_B2", GL_R3_G3_B2},
#ifdef GL_RGB2_EXT
{"GL_RGB2", GL_RGB2_EXT},
#endif
};
#define NUM_GL_SOLID_MODES (sizeof(gl_solid_modes) / sizeof (gltmode_t))
/*
===============
GL_TextureMode
===============
*/
void GL_TextureMode( char *string )
{
int i;
image_t *glt;
for (i=0 ; i< NUM_GL_MODES ; i++)
{
if ( !Q_stricmp( modes[i].name, string ) )
break;
}
if (i == NUM_GL_MODES)
{
ri.Con_Printf (PRINT_ALL, "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->type != it_pic && glt->type != it_sky )
{
GL_Bind (glt->texnum);
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
}
}
}
/*
===============
GL_TextureAlphaMode
===============
*/
void GL_TextureAlphaMode( char *string )
{
int i;
for (i=0 ; i< NUM_GL_ALPHA_MODES ; i++)
{
if ( !Q_stricmp( gl_alpha_modes[i].name, string ) )
break;
}
if (i == NUM_GL_ALPHA_MODES)
{
ri.Con_Printf (PRINT_ALL, "bad alpha texture mode name\n");
return;
}
gl_tex_alpha_format = gl_alpha_modes[i].mode;
}
/*
===============
GL_TextureSolidMode
===============
*/
void GL_TextureSolidMode( char *string )
{
int i;
for (i=0 ; i< NUM_GL_SOLID_MODES ; i++)
{
if ( !Q_stricmp( gl_solid_modes[i].name, string ) )
break;
}
if (i == NUM_GL_SOLID_MODES)
{
ri.Con_Printf (PRINT_ALL, "bad solid texture mode name\n");
return;
}
gl_tex_solid_format = gl_solid_modes[i].mode;
}
/*
===============
GL_ImageList_f
===============
*/
void GL_ImageList_f (void)
{
int i;
image_t *image;
int texels;
const char *palstrings[2] =
{
"RGB",
"PAL"
};
ri.Con_Printf (PRINT_ALL, "------------------\n");
texels = 0;
for (i=0, image=gltextures ; i<numgltextures ; i++, image++)
{
if (image->texnum <= 0)
continue;
texels += image->upload_width*image->upload_height;
switch (image->type)
{
case it_skin:
ri.Con_Printf (PRINT_ALL, "M");
break;
case it_sprite:
ri.Con_Printf (PRINT_ALL, "S");
break;
case it_wall:
ri.Con_Printf (PRINT_ALL, "W");
break;
case it_pic:
ri.Con_Printf (PRINT_ALL, "P");
break;
default:
ri.Con_Printf (PRINT_ALL, " ");
break;
}
ri.Con_Printf (PRINT_ALL, " %3i %3i %s: %s\n",
image->upload_width, image->upload_height, palstrings[image->paletted], image->name);
}
ri.Con_Printf (PRINT_ALL, "Total texel count (not counting mipmaps): %i\n", texels);
}
/*
=============================================================================
scrap allocation
Allocate all the little status bar obejcts into a single texture
to crutch up inefficient hardware / drivers
=============================================================================
*/
#define MAX_SCRAPS 1
#define BLOCK_WIDTH 256
#define BLOCK_HEIGHT 256
int scrap_allocated[MAX_SCRAPS][BLOCK_WIDTH];
byte scrap_texels[MAX_SCRAPS][BLOCK_WIDTH*BLOCK_HEIGHT];
qboolean scrap_dirty;
// 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 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;
}
return -1;
// Sys_Error ("Scrap_AllocBlock: full");
}
int scrap_uploads;
void Scrap_Upload (void)
{
scrap_uploads++;
GL_Bind(TEXNUM_SCRAPS);
GL_Upload8 (scrap_texels[0], BLOCK_WIDTH, BLOCK_HEIGHT, false, false );
scrap_dirty = false;
}
/*
=================================================================
PCX LOADING
=================================================================
*/
/*
==============
LoadPCX
==============
*/
void LoadPCX (char *filename, byte **pic, byte **palette, int *width, int *height)
{
byte *raw;
pcx_t *pcx;
int x, y;
int len;
int dataByte, runLength;
byte *out, *pix;
*pic = NULL;
*palette = NULL;
//
// load the file
//
len = ri.FS_LoadFile (filename, (void **)&raw);
if (!raw)
{
ri.Con_Printf (PRINT_DEVELOPER, "Bad pcx file %s\n", filename);
return;
}
//
// parse the PCX file
//
pcx = (pcx_t *)raw;
pcx->xmin = LittleShort(pcx->xmin);
pcx->ymin = LittleShort(pcx->ymin);
pcx->xmax = LittleShort(pcx->xmax);
pcx->ymax = LittleShort(pcx->ymax);
pcx->hres = LittleShort(pcx->hres);
pcx->vres = LittleShort(pcx->vres);
pcx->bytes_per_line = LittleShort(pcx->bytes_per_line);
pcx->palette_type = LittleShort(pcx->palette_type);
raw = &pcx->data;
if (pcx->manufacturer != 0x0a
|| pcx->version != 5
|| pcx->encoding != 1
|| pcx->bits_per_pixel != 8
|| pcx->xmax >= 640
|| pcx->ymax >= 480)
{
ri.Con_Printf (PRINT_ALL, "Bad pcx file %s\n", filename);
return;
}
out = malloc ( (pcx->ymax+1) * (pcx->xmax+1) );
*pic = out;
pix = out;
if (palette)
{
*palette = malloc(768);
memcpy (*palette, (byte *)pcx + len - 768, 768);
}
if (width)
*width = pcx->xmax+1;
if (height)
*height = pcx->ymax+1;
for (y=0 ; y<=pcx->ymax ; y++, pix += pcx->xmax+1)
{
for (x=0 ; x<=pcx->xmax ; )
{
dataByte = *raw++;
if((dataByte & 0xC0) == 0xC0)
{
runLength = dataByte & 0x3F;
dataByte = *raw++;
}
else
runLength = 1;
while(runLength-- > 0)
pix[x++] = dataByte;
}
}
if ( raw - (byte *)pcx > len)
{
ri.Con_Printf (PRINT_DEVELOPER, "PCX file %s was malformed", filename);
free (*pic);
*pic = NULL;
}
ri.FS_FreeFile (pcx);
}
/*
=========================================================
TARGA LOADING
=========================================================
*/
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;
/*
=============
LoadTGA
=============
*/
void LoadTGA (char *name, byte **pic, int *width, int *height)
{
int columns, rows, numPixels;
byte *pixbuf;
int row, column;
byte *buf_p;
byte *buffer;
int length;
TargaHeader targa_header;
byte *targa_rgba;
byte tmp[2];
*pic = NULL;
//
// load the file
//
length = ri.FS_LoadFile (name, (void **)&buffer);
if (!buffer)
{
ri.Con_Printf (PRINT_DEVELOPER, "Bad tga file %s\n", name);
return;
}
buf_p = buffer;
targa_header.id_length = *buf_p++;
targa_header.colormap_type = *buf_p++;
targa_header.image_type = *buf_p++;
tmp[0] = buf_p[0];
tmp[1] = buf_p[1];
targa_header.colormap_index = LittleShort ( *((short *)tmp) );
buf_p+=2;
tmp[0] = buf_p[0];
tmp[1] = buf_p[1];
targa_header.colormap_length = LittleShort ( *((short *)tmp) );
buf_p+=2;
targa_header.colormap_size = *buf_p++;
targa_header.x_origin = LittleShort ( *((short *)buf_p) );
buf_p+=2;
targa_header.y_origin = LittleShort ( *((short *)buf_p) );
buf_p+=2;
targa_header.width = LittleShort ( *((short *)buf_p) );
buf_p+=2;
targa_header.height = LittleShort ( *((short *)buf_p) );
buf_p+=2;
targa_header.pixel_size = *buf_p++;
targa_header.attributes = *buf_p++;
if (targa_header.image_type!=2
&& targa_header.image_type!=10)
ri.Sys_Error (ERR_DROP, "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))
ri.Sys_Error (ERR_DROP, "LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n");
columns = targa_header.width;
rows = targa_header.height;
numPixels = columns * rows;
if (width)
*width = columns;
if (height)
*height = rows;
targa_rgba = malloc (numPixels*4);
*pic = targa_rgba;
if (targa_header.id_length != 0)
buf_p += targa_header.id_length; // skip TARGA image comment
if (targa_header.image_type==2) { // Uncompressed, RGB images
for(row=rows-1; row>=0; row--) {
pixbuf = targa_rgba + row*columns*4;
for(column=0; column<columns; column++) {
unsigned char red,green,blue,alphabyte;
switch (targa_header.pixel_size) {
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
}
}
}
}
else if (targa_header.image_type==10) { // Runlength encoded RGB images
unsigned char red,green,blue,alphabyte,packetHeader,packetSize,j;
for(row=rows-1; row>=0; row--) {
pixbuf = targa_rgba + row*columns*4;
for(column=0; column<columns; ) {
packetHeader= *buf_p++;
packetSize = 1 + (packetHeader & 0x7f);
if (packetHeader & 0x80) { // run-length packet
switch (targa_header.pixel_size) {
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
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--;
else
goto breakOut;
pixbuf = targa_rgba + row*columns*4;
}
}
}
else { // non run-length packet
for(j=0;j<packetSize;j++) {
switch (targa_header.pixel_size) {
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
*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--;
else
goto breakOut;
pixbuf = targa_rgba + row*columns*4;
}
}
}
}
breakOut:;
}
}
ri.FS_FreeFile (buffer);
}
/*
====================================================================
IMAGE FLOOD FILLING
====================================================================
*/
/*
=================
Mod_FloodFillSkin
Fill background pixels so mipmapping doesn't have haloes
=================
*/
typedef struct
{
short x, y;
} floodfill_t;
// must be a power of 2
#define FLOODFILL_FIFO_SIZE 0x1000
#define FLOODFILL_FIFO_MASK (FLOODFILL_FIFO_SIZE - 1)
#define FLOODFILL_STEP( off, dx, dy ) \
{ \
if (pos[off] == fillcolor) \
{ \
pos[off] = 255; \
fifo[inpt].x = x + (dx), fifo[inpt].y = y + (dy); \
inpt = (inpt + 1) & FLOODFILL_FIFO_MASK; \
} \
else if (pos[off] != 255) fdc = pos[off]; \
}
void R_FloodFillSkin( byte *skin, int skinwidth, int skinheight )
{
byte fillcolor = *skin; // assume this is the pixel to fill
floodfill_t fifo[FLOODFILL_FIFO_SIZE];
int inpt = 0, outpt = 0;
int filledcolor = -1;
int i;
if (filledcolor == -1)
{
filledcolor = 0;
// attempt to find opaque black
for (i = 0; i < 256; ++i)
if (d_8to24table[i] == (255 << 0)) // alpha 1.0
{
filledcolor = i;
break;
}
}
// can't fill to filled color or to transparent color (used as visited marker)
if ((fillcolor == filledcolor) || (fillcolor == 255))
{
//printf( "not filling skin from %d to %d\n", fillcolor, filledcolor );
return;
}
fifo[inpt].x = 0, fifo[inpt].y = 0;
inpt = (inpt + 1) & FLOODFILL_FIFO_MASK;
while (outpt != inpt)
{
int x = fifo[outpt].x, y = fifo[outpt].y;
int fdc = filledcolor;
byte *pos = &skin[x + skinwidth * y];
outpt = (outpt + 1) & FLOODFILL_FIFO_MASK;
if (x > 0) FLOODFILL_STEP( -1, -1, 0 );
if (x < skinwidth - 1) FLOODFILL_STEP( 1, 1, 0 );
if (y > 0) FLOODFILL_STEP( -skinwidth, 0, -1 );
if (y < skinheight - 1) FLOODFILL_STEP( skinwidth, 0, 1 );
skin[x + skinwidth * y] = fdc;
}
}
//=======================================================
/*
================
GL_ResampleTexture
================
*/
void GL_ResampleTexture (unsigned *in, int inwidth, int inheight, unsigned *out, int outwidth, int outheight)
{
int i, j;
unsigned *inrow, *inrow2;
unsigned frac, fracstep;
unsigned p1[1024], p2[1024];
byte *pix1, *pix2, *pix3, *pix4;
fracstep = inwidth*0x10000/outwidth;
frac = fracstep>>2;
for (i=0 ; i<outwidth ; i++)
{
p1[i] = 4*(frac>>16);
frac += fracstep;
}
frac = 3*(fracstep>>2);
for (i=0 ; i<outwidth ; i++)
{
p2[i] = 4*(frac>>16);
frac += fracstep;
}
for (i=0 ; i<outheight ; i++, out += outwidth)
{
inrow = in + inwidth*(int)((i+0.25)*inheight/outheight);
inrow2 = in + inwidth*(int)((i+0.75)*inheight/outheight);
frac = fracstep >> 1;
for (j=0 ; j<outwidth ; j++)
{
pix1 = (byte *)inrow + p1[j];
pix2 = (byte *)inrow + p2[j];
pix3 = (byte *)inrow2 + p1[j];
pix4 = (byte *)inrow2 + p2[j];
((byte *)(out+j))[0] = (pix1[0] + pix2[0] + pix3[0] + pix4[0])>>2;
((byte *)(out+j))[1] = (pix1[1] + pix2[1] + pix3[1] + pix4[1])>>2;
((byte *)(out+j))[2] = (pix1[2] + pix2[2] + pix3[2] + pix4[2])>>2;
((byte *)(out+j))[3] = (pix1[3] + pix2[3] + pix3[3] + pix4[3])>>2;
}
}
}
/*
================
GL_LightScaleTexture
Scale up the pixel values in a texture to increase the
lighting range
================
*/
void GL_LightScaleTexture (unsigned *in, int inwidth, int inheight, qboolean only_gamma )
{
if ( only_gamma )
{
int i, c;
byte *p;
p = (byte *)in;
c = inwidth*inheight;
for (i=0 ; i<c ; i++, p+=4)
{
p[0] = gammatable[p[0]];
p[1] = gammatable[p[1]];
p[2] = gammatable[p[2]];
}
}
else
{
int i, c;
byte *p;
p = (byte *)in;
c = inwidth*inheight;
for (i=0 ; i<c ; i++, p+=4)
{
p[0] = gammatable[intensitytable[p[0]]];
p[1] = gammatable[intensitytable[p[1]]];
p[2] = gammatable[intensitytable[p[2]]];
}
}
}
/*
================
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_Upload32
Returns has_alpha
===============
*/
void GL_BuildPalettedTexture( unsigned char *paletted_texture, unsigned char *scaled, int scaled_width, int scaled_height )
{
int i;
for ( i = 0; i < scaled_width * scaled_height; i++ )
{
unsigned int r, g, b, c;
r = ( scaled[0] >> 3 ) & 31;
g = ( scaled[1] >> 2 ) & 63;
b = ( scaled[2] >> 3 ) & 31;
c = r | ( g << 5 ) | ( b << 11 );
paletted_texture[i] = gl_state.d_16to8table[c];
scaled += 4;
}
}
int upload_width, upload_height;
qboolean uploaded_paletted;
qboolean GL_Upload32 (unsigned *data, int width, int height, qboolean mipmap)
{
int samples;
unsigned scaled[256*256];
unsigned char paletted_texture[256*256];
int scaled_width, scaled_height;
int i, c;
byte *scan;
int comp;
uploaded_paletted = false;
for (scaled_width = 1 ; scaled_width < width ; scaled_width<<=1)
;
if (gl_round_down->value && scaled_width > width && mipmap)
scaled_width >>= 1;
for (scaled_height = 1 ; scaled_height < height ; scaled_height<<=1)
;
if (gl_round_down->value && scaled_height > height && mipmap)
scaled_height >>= 1;
// let people sample down the world textures for speed
if (mipmap)
{
scaled_width >>= (int)gl_picmip->value;
scaled_height >>= (int)gl_picmip->value;
}
// don't ever bother with >256 textures
if (scaled_width > 256)
scaled_width = 256;
if (scaled_height > 256)
scaled_height = 256;
if (scaled_width < 1)
scaled_width = 1;
if (scaled_height < 1)
scaled_height = 1;
upload_width = scaled_width;
upload_height = scaled_height;
if (scaled_width * scaled_height > sizeof(scaled)/4)
ri.Sys_Error (ERR_DROP, "GL_Upload32: too big");
// scan the texture for any non-255 alpha
c = width*height;
scan = ((byte *)data) + 3;
samples = gl_solid_format;
for (i=0 ; i<c ; i++, scan += 4)
{
if ( *scan != 255 )
{
samples = gl_alpha_format;
break;
}
}
if (samples == gl_solid_format)
comp = gl_tex_solid_format;
else if (samples == gl_alpha_format)
comp = gl_tex_alpha_format;
else {
ri.Con_Printf (PRINT_ALL,
"Unknown number of texture components %i\n",
samples);
comp = samples;
}
#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)
qglTexImage2D (GL_TEXTURE_2D, 0, comp, 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);
qglTexImage2D (GL_TEXTURE_2D, 0, comp, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
}
#else
if (scaled_width == width && scaled_height == height)
{
if (!mipmap)
{
if ( qglColorTableEXT && gl_ext_palettedtexture->value && samples == gl_solid_format )
{
uploaded_paletted = true;
GL_BuildPalettedTexture( paletted_texture, ( unsigned char * ) data, scaled_width, scaled_height );
qglTexImage2D( GL_TEXTURE_2D,
0,
GL_COLOR_INDEX8_EXT,
scaled_width,
scaled_height,
0,
GL_COLOR_INDEX,
GL_UNSIGNED_BYTE,
paletted_texture );
}
else
{
qglTexImage2D (GL_TEXTURE_2D, 0, comp, 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);
GL_LightScaleTexture (scaled, scaled_width, scaled_height, !mipmap );
if ( qglColorTableEXT && gl_ext_palettedtexture->value && ( samples == gl_solid_format ) )
{
uploaded_paletted = true;
GL_BuildPalettedTexture( paletted_texture, ( unsigned char * ) scaled, scaled_width, scaled_height );
qglTexImage2D( GL_TEXTURE_2D,
0,
GL_COLOR_INDEX8_EXT,
scaled_width,
scaled_height,
0,
GL_COLOR_INDEX,
GL_UNSIGNED_BYTE,
paletted_texture );
}
else
{
qglTexImage2D( GL_TEXTURE_2D, 0, comp, 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++;
if ( qglColorTableEXT && gl_ext_palettedtexture->value && samples == gl_solid_format )
{
uploaded_paletted = true;
GL_BuildPalettedTexture( paletted_texture, ( unsigned char * ) scaled, scaled_width, scaled_height );
qglTexImage2D( GL_TEXTURE_2D,
miplevel,
GL_COLOR_INDEX8_EXT,
scaled_width,
scaled_height,
0,
GL_COLOR_INDEX,
GL_UNSIGNED_BYTE,
paletted_texture );
}
else
{
qglTexImage2D (GL_TEXTURE_2D, miplevel, comp, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
}
}
}
done: ;
#endif
if (mipmap)
{
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
}
else
{
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_max);
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
}
return (samples == gl_alpha_format);
}
/*
===============
GL_Upload8
Returns has_alpha
===============
*/
/*
static qboolean IsPowerOf2( int value )
{
int i = 1;
while ( 1 )
{
if ( value == i )
return true;
if ( i > value )
return false;
i <<= 1;
}
}
*/
qboolean GL_Upload8 (byte *data, int width, int height, qboolean mipmap, qboolean is_sky )
{
unsigned trans[512*256];
int i, s;
int p;
s = width*height;
if (s > sizeof(trans)/4)
ri.Sys_Error (ERR_DROP, "GL_Upload8: too large");
if ( qglColorTableEXT &&
gl_ext_palettedtexture->value &&
is_sky )
{
qglTexImage2D( GL_TEXTURE_2D,
0,
GL_COLOR_INDEX8_EXT,
width,
height,
0,
GL_COLOR_INDEX,
GL_UNSIGNED_BYTE,
data );
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_max);
qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
}
else
{
for (i=0 ; i<s ; i++)
{
p = data[i];
trans[i] = d_8to24table[p];
if (p == 255)
{ // transparent, so scan around for another color
// to avoid alpha fringes
// FIXME: do a full flood fill so mips work...
if (i > width && data[i-width] != 255)
p = data[i-width];
else if (i < s-width && data[i+width] != 255)
p = data[i+width];
else if (i > 0 && data[i-1] != 255)
p = data[i-1];
else if (i < s-1 && data[i+1] != 255)
p = data[i+1];
else
p = 0;
// copy rgb components
((byte *)&trans[i])[0] = ((byte *)&d_8to24table[p])[0];
((byte *)&trans[i])[1] = ((byte *)&d_8to24table[p])[1];
((byte *)&trans[i])[2] = ((byte *)&d_8to24table[p])[2];
}
}
return GL_Upload32 (trans, width, height, mipmap);
}
}
/*
================
GL_LoadPic
This is also used as an entry point for the generated r_notexture
================
*/
image_t *GL_LoadPic (char *name, byte *pic, int width, int height, imagetype_t type, int bits)
{
image_t *image;
int i;
// find a free image_t
for (i=0, image=gltextures ; i<numgltextures ; i++,image++)
{
if (!image->texnum)
break;
}
if (i == numgltextures)
{
if (numgltextures == MAX_GLTEXTURES)
ri.Sys_Error (ERR_DROP, "MAX_GLTEXTURES");
numgltextures++;
}
image = &gltextures[i];
if (strlen(name) >= sizeof(image->name))
ri.Sys_Error (ERR_DROP, "Draw_LoadPic: \"%s\" is too long", name);
strcpy (image->name, name);
image->registration_sequence = registration_sequence;
image->width = width;
image->height = height;
image->type = type;
if (type == it_skin && bits == 8)
R_FloodFillSkin(pic, width, height);
// load little pics into the scrap
if (image->type == it_pic && bits == 8
&& image->width < 64 && image->height < 64)
{
int x, y;
int i, j, k;
int texnum;
texnum = Scrap_AllocBlock (image->width, image->height, &x, &y);
if (texnum == -1)
goto nonscrap;
scrap_dirty = true;
// copy the texels into the scrap block
k = 0;
for (i=0 ; i<image->height ; i++)
for (j=0 ; j<image->width ; j++, k++)
scrap_texels[texnum][(y+i)*BLOCK_WIDTH + x + j] = pic[k];
image->texnum = TEXNUM_SCRAPS + texnum;
image->scrap = true;
image->has_alpha = true;
image->sl = (x+0.01)/(float)BLOCK_WIDTH;
image->sh = (x+image->width-0.01)/(float)BLOCK_WIDTH;
image->tl = (y+0.01)/(float)BLOCK_WIDTH;
image->th = (y+image->height-0.01)/(float)BLOCK_WIDTH;
}
else
{
nonscrap:
image->scrap = false;
image->texnum = TEXNUM_IMAGES + (image - gltextures);
GL_Bind(image->texnum);
if (bits == 8)
image->has_alpha = GL_Upload8 (pic, width, height, (image->type != it_pic && image->type != it_sky), image->type == it_sky );
else
image->has_alpha = GL_Upload32 ((unsigned *)pic, width, height, (image->type != it_pic && image->type != it_sky) );
image->upload_width = upload_width; // after power of 2 and scales
image->upload_height = upload_height;
image->paletted = uploaded_paletted;
image->sl = 0;
image->sh = 1;
image->tl = 0;
image->th = 1;
}
return image;
}
/*
================
GL_LoadWal
================
*/
image_t *GL_LoadWal (char *name)
{
miptex_t *mt;
int width, height, ofs;
image_t *image;
ri.FS_LoadFile (name, (void **)&mt);
if (!mt)
{
ri.Con_Printf (PRINT_ALL, "GL_FindImage: can't load %s\n", name);
return r_notexture;
}
width = LittleLong (mt->width);
height = LittleLong (mt->height);
ofs = LittleLong (mt->offsets[0]);
image = GL_LoadPic (name, (byte *)mt + ofs, width, height, it_wall, 8);
ri.FS_FreeFile ((void *)mt);
return image;
}
/*
===============
GL_FindImage
Finds or loads the given image
===============
*/
image_t *GL_FindImage (char *name, imagetype_t type)
{
image_t *image;
int i, len;
byte *pic, *palette;
int width, height;
if (!name)
return NULL; // ri.Sys_Error (ERR_DROP, "GL_FindImage: NULL name");
len = strlen(name);
if (len<5)
return NULL; // ri.Sys_Error (ERR_DROP, "GL_FindImage: bad name: %s", name);
// look for it
for (i=0, image=gltextures ; i<numgltextures ; i++,image++)
{
if (!strcmp(name, image->name))
{
image->registration_sequence = registration_sequence;
return image;
}
}
//
// load the pic from disk
//
pic = NULL;
palette = NULL;
if (!strcmp(name+len-4, ".pcx"))
{
LoadPCX (name, &pic, &palette, &width, &height);
if (!pic)
return NULL; // ri.Sys_Error (ERR_DROP, "GL_FindImage: can't load %s", name);
image = GL_LoadPic (name, pic, width, height, type, 8);
}
else if (!strcmp(name+len-4, ".wal"))
{
image = GL_LoadWal (name);
}
else if (!strcmp(name+len-4, ".tga"))
{
LoadTGA (name, &pic, &width, &height);
if (!pic)
return NULL; // ri.Sys_Error (ERR_DROP, "GL_FindImage: can't load %s", name);
image = GL_LoadPic (name, pic, width, height, type, 32);
}
else
return NULL; // ri.Sys_Error (ERR_DROP, "GL_FindImage: bad extension on: %s", name);
if (pic)
free(pic);
if (palette)
free(palette);
return image;
}
/*
===============
R_RegisterSkin
===============
*/
struct image_s *R_RegisterSkin (char *name)
{
return GL_FindImage (name, it_skin);
}
/*
================
GL_FreeUnusedImages
Any image that was not touched on this registration sequence
will be freed.
================
*/
void GL_FreeUnusedImages (void)
{
int i;
image_t *image;
// never free r_notexture or particle texture
r_notexture->registration_sequence = registration_sequence;
r_particletexture->registration_sequence = registration_sequence;
for (i=0, image=gltextures ; i<numgltextures ; i++, image++)
{
if (image->registration_sequence == registration_sequence)
continue; // used this sequence
if (!image->registration_sequence)
continue; // free image_t slot
if (image->type == it_pic)
continue; // don't free pics
// free it
qglDeleteTextures (1, &image->texnum);
memset (image, 0, sizeof(*image));
}
}
/*
===============
Draw_GetPalette
===============
*/
int Draw_GetPalette (void)
{
int i;
int r, g, b;
unsigned v;
byte *pic, *pal;
int width, height;
// get the palette
LoadPCX ("pics/colormap.pcx", &pic, &pal, &width, &height);
if (!pal)
ri.Sys_Error (ERR_FATAL, "Couldn't load pics/colormap.pcx");
for (i=0 ; i<256 ; i++)
{
r = pal[i*3+0];
g = pal[i*3+1];
b = pal[i*3+2];
v = (255<<24) + (r<<0) + (g<<8) + (b<<16);
d_8to24table[i] = LittleLong(v);
}
d_8to24table[255] &= LittleLong(0xffffff); // 255 is transparent
free (pic);
free (pal);
return 0;
}
/*
===============
GL_InitImages
===============
*/
void GL_InitImages (void)
{
int i, j;
float g = vid_gamma->value;
registration_sequence = 1;
// init intensity conversions
intensity = ri.Cvar_Get ("intensity", "2", 0);
if ( intensity->value <= 1 )
ri.Cvar_Set( "intensity", "1" );
gl_state.inverse_intensity = 1 / intensity->value;
Draw_GetPalette ();
if ( qglColorTableEXT )
{
ri.FS_LoadFile( "pics/16to8.dat", &gl_state.d_16to8table );
if ( !gl_state.d_16to8table )
ri.Sys_Error( ERR_FATAL, "Couldn't load pics/16to8.pcx");
}
if ( gl_config.renderer & ( GL_RENDERER_VOODOO | GL_RENDERER_VOODOO2 ) )
{
g = 1.0F;
}
for ( i = 0; i < 256; i++ )
{
if ( g == 1 )
{
gammatable[i] = i;
}
else
{
float inf;
inf = 255 * pow ( (i+0.5)/255.5 , g ) + 0.5;
if (inf < 0)
inf = 0;
if (inf > 255)
inf = 255;
gammatable[i] = inf;
}
}
for (i=0 ; i<256 ; i++)
{
j = i*intensity->value;
if (j > 255)
j = 255;
intensitytable[i] = j;
}
}
/*
===============
GL_ShutdownImages
===============
*/
void GL_ShutdownImages (void)
{
int i;
image_t *image;
for (i=0, image=gltextures ; i<numgltextures ; i++, image++)
{
if (!image->registration_sequence)
continue; // free image_t slot
// free it
qglDeleteTextures (1, &image->texnum);
memset (image, 0, sizeof(*image));
}
}
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