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gl_texmgr.c
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gl_texmgr.c
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/*
Copyright (C) 1996-2001 Id Software, Inc.
Copyright (C) 2002-2009 John Fitzgibbons and others
Copyright (C) 2007-2008 Kristian Duske
Copyright (C) 2010-2014 QuakeSpasm developers
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_texmgr.c -- fitzquake's texture manager. manages opengl texture images
#include "quakedef.h"
const int gl_solid_format = 3;
const int gl_alpha_format = 4;
static cvar_t gl_texturemode = {"gl_texturemode", "", CVAR_ARCHIVE};
static cvar_t gl_texture_anisotropy = {"gl_texture_anisotropy", "1", CVAR_ARCHIVE};
static cvar_t gl_max_size = {"gl_max_size", "0", CVAR_NONE};
static cvar_t gl_picmip = {"gl_picmip", "0", CVAR_NONE};
static GLint gl_hardware_maxsize;
#define MAX_GLTEXTURES 2048
static int numgltextures;
static gltexture_t *active_gltextures, *free_gltextures;
gltexture_t *notexture, *nulltexture;
unsigned int d_8to24table[256];
unsigned int d_8to24table_fbright[256];
unsigned int d_8to24table_fbright_fence[256];
unsigned int d_8to24table_nobright[256];
unsigned int d_8to24table_nobright_fence[256];
unsigned int d_8to24table_conchars[256];
unsigned int d_8to24table_shirt[256];
unsigned int d_8to24table_pants[256];
/*
================================================================================
COMMANDS
================================================================================
*/
typedef struct
{
int magfilter;
int minfilter;
const char *name;
} glmode_t;
static glmode_t glmodes[] = {
{GL_NEAREST, GL_NEAREST, "GL_NEAREST"},
{GL_NEAREST, GL_NEAREST_MIPMAP_NEAREST, "GL_NEAREST_MIPMAP_NEAREST"},
{GL_NEAREST, GL_NEAREST_MIPMAP_LINEAR, "GL_NEAREST_MIPMAP_LINEAR"},
{GL_LINEAR, GL_LINEAR, "GL_LINEAR"},
{GL_LINEAR, GL_LINEAR_MIPMAP_NEAREST, "GL_LINEAR_MIPMAP_NEAREST"},
{GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, "GL_LINEAR_MIPMAP_LINEAR"},
};
#define NUM_GLMODES (int)(sizeof(glmodes)/sizeof(glmodes[0]))
static int glmode_idx = NUM_GLMODES - 1; /* trilinear */
/*
===============
TexMgr_DescribeTextureModes_f -- report available texturemodes
===============
*/
static void TexMgr_DescribeTextureModes_f (void)
{
int i;
for (i = 0; i < NUM_GLMODES; i++)
Con_SafePrintf (" %2i: %s\n", i + 1, glmodes[i].name);
Con_Printf ("%i modes\n", i);
}
/*
===============
TexMgr_SetFilterModes
===============
*/
static void TexMgr_SetFilterModes (gltexture_t *glt)
{
GL_Bind (glt);
if (glt->flags & TEXPREF_NEAREST)
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
}
else if (glt->flags & TEXPREF_LINEAR)
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
else if (glt->flags & TEXPREF_MIPMAP)
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, glmodes[glmode_idx].magfilter);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, glmodes[glmode_idx].minfilter);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, gl_texture_anisotropy.value);
}
else
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, glmodes[glmode_idx].magfilter);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, glmodes[glmode_idx].magfilter);
}
}
/*
===============
TexMgr_TextureMode_f -- called when gl_texturemode changes
===============
*/
static void TexMgr_TextureMode_f (cvar_t *var)
{
gltexture_t *glt;
int i;
for (i = 0; i < NUM_GLMODES; i++)
{
if (!Q_strcmp (glmodes[i].name, gl_texturemode.string))
{
if (glmode_idx != i)
{
glmode_idx = i;
for (glt = active_gltextures; glt; glt = glt->next)
TexMgr_SetFilterModes (glt);
Sbar_Changed (); //sbar graphics need to be redrawn with new filter mode
//FIXME: warpimages need to be redrawn, too.
}
return;
}
}
for (i = 0; i < NUM_GLMODES; i++)
{
if (!q_strcasecmp (glmodes[i].name, gl_texturemode.string))
{
Cvar_SetQuick (&gl_texturemode, glmodes[i].name);
return;
}
}
i = atoi(gl_texturemode.string);
if (i >= 1 && i <= NUM_GLMODES)
{
Cvar_SetQuick (&gl_texturemode, glmodes[i-1].name);
return;
}
Con_Printf ("\"%s\" is not a valid texturemode\n", gl_texturemode.string);
Cvar_SetQuick (&gl_texturemode, glmodes[glmode_idx].name);
}
/*
===============
TexMgr_Anisotropy_f -- called when gl_texture_anisotropy changes
===============
*/
static void TexMgr_Anisotropy_f (cvar_t *var)
{
if (gl_texture_anisotropy.value < 1)
{
Cvar_SetQuick (&gl_texture_anisotropy, "1");
}
else if (gl_texture_anisotropy.value > gl_max_anisotropy)
{
Cvar_SetValueQuick (&gl_texture_anisotropy, gl_max_anisotropy);
}
else
{
gltexture_t *glt;
for (glt = active_gltextures; glt; glt = glt->next)
{
/* TexMgr_SetFilterModes (glt);*/
if (glt->flags & TEXPREF_MIPMAP) {
GL_Bind (glt);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, glmodes[glmode_idx].magfilter);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, glmodes[glmode_idx].minfilter);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, gl_texture_anisotropy.value);
}
}
}
}
/*
===============
TexMgr_Imagelist_f -- report loaded textures
===============
*/
static void TexMgr_Imagelist_f (void)
{
float mb;
float texels = 0;
gltexture_t *glt;
for (glt = active_gltextures; glt; glt = glt->next)
{
Con_SafePrintf (" %4i x%4i %s\n", glt->width, glt->height, glt->name);
if (glt->flags & TEXPREF_MIPMAP)
texels += glt->width * glt->height * 4.0f / 3.0f;
else
texels += (glt->width * glt->height);
}
mb = texels * (Cvar_VariableValue("vid_bpp") / 8.0f) / 0x100000;
Con_Printf ("%i textures %i pixels %1.1f megabytes\n", numgltextures, (int)texels, mb);
}
/*
===============
TexMgr_Imagedump_f -- dump all current textures to TGA files
===============
*/
static void TexMgr_Imagedump_f (void)
{
char tganame[MAX_OSPATH], tempname[MAX_OSPATH], dirname[MAX_OSPATH];
gltexture_t *glt;
byte *buffer;
char *c;
//create directory
q_snprintf(dirname, sizeof(dirname), "%s/imagedump", com_gamedir);
Sys_mkdir (dirname);
//loop through textures
for (glt = active_gltextures; glt; glt = glt->next)
{
q_strlcpy (tempname, glt->name, sizeof(tempname));
while ( (c = strchr(tempname, ':')) ) *c = '_';
while ( (c = strchr(tempname, '/')) ) *c = '_';
while ( (c = strchr(tempname, '*')) ) *c = '_';
q_snprintf(tganame, sizeof(tganame), "imagedump/%s.tga", tempname);
GL_Bind (glt);
if (glt->flags & TEXPREF_ALPHA)
{
buffer = (byte *) malloc(glt->width*glt->height*4);
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
Image_WriteTGA (tganame, buffer, glt->width, glt->height, 32, true);
}
else
{
buffer = (byte *) malloc(glt->width*glt->height*3);
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, buffer);
Image_WriteTGA (tganame, buffer, glt->width, glt->height, 24, true);
}
free (buffer);
}
Con_Printf ("dumped %i textures to %s\n", numgltextures, dirname);
}
/*
===============
TexMgr_FrameUsage -- report texture memory usage for this frame
===============
*/
float TexMgr_FrameUsage (void)
{
float mb;
float texels = 0;
gltexture_t *glt;
for (glt = active_gltextures; glt; glt = glt->next)
{
if (glt->visframe == r_framecount)
{
if (glt->flags & TEXPREF_MIPMAP)
texels += glt->width * glt->height * 4.0f / 3.0f;
else
texels += (glt->width * glt->height);
}
}
mb = texels * (Cvar_VariableValue("vid_bpp") / 8.0f) / 0x100000;
return mb;
}
/*
================================================================================
TEXTURE MANAGER
================================================================================
*/
/*
================
TexMgr_FindTexture
================
*/
gltexture_t *TexMgr_FindTexture (qmodel_t *owner, const char *name)
{
gltexture_t *glt;
if (name)
{
for (glt = active_gltextures; glt; glt = glt->next)
{
if (glt->owner == owner && !strcmp (glt->name, name))
return glt;
}
}
return NULL;
}
/*
================
TexMgr_NewTexture
================
*/
gltexture_t *TexMgr_NewTexture (void)
{
gltexture_t *glt;
if (numgltextures == MAX_GLTEXTURES)
Sys_Error("numgltextures == MAX_GLTEXTURES\n");
glt = free_gltextures;
free_gltextures = glt->next;
glt->next = active_gltextures;
active_gltextures = glt;
glGenTextures(1, &glt->texnum);
numgltextures++;
return glt;
}
static void GL_DeleteTexture (gltexture_t *texture);
/*
================
TexMgr_FreeTexture
================
*/
void TexMgr_FreeTexture (gltexture_t *kill)
{
gltexture_t *glt;
if (kill == NULL)
{
Con_Printf ("TexMgr_FreeTexture: NULL texture\n");
return;
}
if (active_gltextures == kill)
{
active_gltextures = kill->next;
kill->next = free_gltextures;
free_gltextures = kill;
GL_DeleteTexture(kill);
numgltextures--;
return;
}
for (glt = active_gltextures; glt; glt = glt->next)
{
if (glt->next == kill)
{
glt->next = kill->next;
kill->next = free_gltextures;
free_gltextures = kill;
GL_DeleteTexture(kill);
numgltextures--;
return;
}
}
Con_Printf ("TexMgr_FreeTexture: not found\n");
}
/*
================
TexMgr_FreeTextures
compares each bit in "flags" to the one in glt->flags only if that bit is active in "mask"
================
*/
void TexMgr_FreeTextures (unsigned int flags, unsigned int mask)
{
gltexture_t *glt, *next;
for (glt = active_gltextures; glt; glt = next)
{
next = glt->next;
if ((glt->flags & mask) == (flags & mask))
TexMgr_FreeTexture (glt);
}
}
/*
================
TexMgr_FreeTexturesForOwner
================
*/
void TexMgr_FreeTexturesForOwner (qmodel_t *owner)
{
gltexture_t *glt, *next;
for (glt = active_gltextures; glt; glt = next)
{
next = glt->next;
if (glt && glt->owner == owner)
TexMgr_FreeTexture (glt);
}
}
/*
================
TexMgr_DeleteTextureObjects
================
*/
void TexMgr_DeleteTextureObjects (void)
{
gltexture_t *glt;
for (glt = active_gltextures; glt; glt = glt->next)
{
GL_DeleteTexture (glt);
}
}
/*
================================================================================
INIT
================================================================================
*/
/*
=================
TexMgr_LoadPalette -- johnfitz -- was VID_SetPalette, moved here, renamed, rewritten
=================
*/
void TexMgr_LoadPalette (void)
{
byte *pal, *src, *dst;
int i, mark;
FILE *f;
COM_FOpenFile ("gfx/palette.lmp", &f, NULL);
if (!f)
Sys_Error ("Couldn't load gfx/palette.lmp");
mark = Hunk_LowMark ();
pal = (byte *) Hunk_Alloc (768);
fread (pal, 1, 768, f);
fclose(f);
//standard palette, 255 is transparent
dst = (byte *)d_8to24table;
src = pal;
for (i = 0; i < 256; i++)
{
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = 255;
}
((byte *) &d_8to24table[255]) [3] = 0;
//fullbright palette, 0-223 are black (for additive blending)
src = pal + 224*3;
dst = (byte *) &d_8to24table_fbright[224];
for (i = 224; i < 256; i++)
{
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = 255;
}
for (i = 0; i < 224; i++)
{
dst = (byte *) &d_8to24table_fbright[i];
dst[3] = 255;
dst[2] = dst[1] = dst[0] = 0;
}
//nobright palette, 224-255 are black (for additive blending)
dst = (byte *)d_8to24table_nobright;
src = pal;
for (i = 0; i < 256; i++)
{
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = 255;
}
for (i = 224; i < 256; i++)
{
dst = (byte *) &d_8to24table_nobright[i];
dst[3] = 255;
dst[2] = dst[1] = dst[0] = 0;
}
//fullbright palette, for fence textures
memcpy(d_8to24table_fbright_fence, d_8to24table_fbright, 256*4);
d_8to24table_fbright_fence[255] = 0; // Alpha of zero.
//nobright palette, for fence textures
memcpy(d_8to24table_nobright_fence, d_8to24table_nobright, 256*4);
d_8to24table_nobright_fence[255] = 0; // Alpha of zero.
//conchars palette, 0 and 255 are transparent
memcpy(d_8to24table_conchars, d_8to24table, 256*4);
((byte *) &d_8to24table_conchars[0]) [3] = 0;
Hunk_FreeToLowMark (mark);
}
/*
================
TexMgr_NewGame
================
*/
void TexMgr_NewGame (void)
{
TexMgr_FreeTextures (0, TEXPREF_PERSIST); //deletes all textures where TEXPREF_PERSIST is unset
TexMgr_LoadPalette ();
}
/*
=============
TexMgr_RecalcWarpImageSize -- called during init, and after a vid_restart
choose safe warpimage size and resize existing warpimage textures
=============
*/
void TexMgr_RecalcWarpImageSize (void)
{
int mark, oldsize;
gltexture_t *glt;
byte *dummy;
//
// find the new correct size
//
oldsize = gl_warpimagesize;
gl_warpimagesize = TexMgr_SafeTextureSize (512);
while (gl_warpimagesize > vid.width)
gl_warpimagesize >>= 1;
while (gl_warpimagesize > vid.height)
gl_warpimagesize >>= 1;
if (gl_warpimagesize == oldsize)
return;
//
// resize the textures in opengl
//
mark = Hunk_LowMark();
dummy = (byte *) Hunk_Alloc (gl_warpimagesize*gl_warpimagesize*4);
for (glt = active_gltextures; glt; glt = glt->next)
{
if (glt->flags & TEXPREF_WARPIMAGE)
{
GL_Bind (glt);
glTexImage2D (GL_TEXTURE_2D, 0, gl_solid_format, gl_warpimagesize, gl_warpimagesize, 0, GL_RGBA, GL_UNSIGNED_BYTE, dummy);
glt->width = glt->height = gl_warpimagesize;
}
}
Hunk_FreeToLowMark (mark);
}
/*
================
TexMgr_Init
must be called before any texture loading
================
*/
void TexMgr_Init (void)
{
int i;
static byte notexture_data[16] = {159,91,83,255,0,0,0,255,0,0,0,255,159,91,83,255}; //black and pink checker
static byte nulltexture_data[16] = {127,191,255,255,0,0,0,255,0,0,0,255,127,191,255,255}; //black and blue checker
extern texture_t *r_notexture_mip, *r_notexture_mip2;
// init texture list
free_gltextures = (gltexture_t *) Hunk_AllocName (MAX_GLTEXTURES * sizeof(gltexture_t), "gltextures");
active_gltextures = NULL;
for (i = 0; i < MAX_GLTEXTURES - 1; i++)
free_gltextures[i].next = &free_gltextures[i+1];
free_gltextures[i].next = NULL;
numgltextures = 0;
// palette
TexMgr_LoadPalette ();
Cvar_RegisterVariable (&gl_max_size);
Cvar_RegisterVariable (&gl_picmip);
Cvar_RegisterVariable (&gl_texture_anisotropy);
Cvar_SetCallback (&gl_texture_anisotropy, &TexMgr_Anisotropy_f);
gl_texturemode.string = glmodes[glmode_idx].name;
Cvar_RegisterVariable (&gl_texturemode);
Cvar_SetCallback (&gl_texturemode, &TexMgr_TextureMode_f);
Cmd_AddCommand ("gl_describetexturemodes", &TexMgr_DescribeTextureModes_f);
Cmd_AddCommand ("imagelist", &TexMgr_Imagelist_f);
Cmd_AddCommand ("imagedump", &TexMgr_Imagedump_f);
// poll max size from hardware
glGetIntegerv (GL_MAX_TEXTURE_SIZE, &gl_hardware_maxsize);
// load notexture images
notexture = TexMgr_LoadImage (NULL, "notexture", 2, 2, SRC_RGBA, notexture_data, "", (src_offset_t)notexture_data, TEXPREF_NEAREST | TEXPREF_PERSIST | TEXPREF_NOPICMIP);
nulltexture = TexMgr_LoadImage (NULL, "nulltexture", 2, 2, SRC_RGBA, nulltexture_data, "", (src_offset_t)nulltexture_data, TEXPREF_NEAREST | TEXPREF_PERSIST | TEXPREF_NOPICMIP);
//have to assign these here becuase Mod_Init is called before TexMgr_Init
r_notexture_mip->gltexture = r_notexture_mip2->gltexture = notexture;
//set safe size for warpimages
gl_warpimagesize = 0;
TexMgr_RecalcWarpImageSize ();
}
/*
================================================================================
IMAGE LOADING
================================================================================
*/
/*
================
TexMgr_Pad -- return smallest power of two greater than or equal to s
================
*/
int TexMgr_Pad (int s)
{
int i;
for (i = 1; i < s; i<<=1)
;
return i;
}
/*
===============
TexMgr_SafeTextureSize -- return a size with hardware and user prefs in mind
===============
*/
int TexMgr_SafeTextureSize (int s)
{
s = TexMgr_Pad(s);
if ((int)gl_max_size.value > 0)
s = q_min(TexMgr_Pad((int)gl_max_size.value), s);
s = q_min(gl_hardware_maxsize, s);
return s;
}
/*
================
TexMgr_PadConditional -- only pad if a texture of that size would be padded. (used for tex coords)
================
*/
int TexMgr_PadConditional (int s)
{
if (s < TexMgr_SafeTextureSize(s))
return TexMgr_Pad(s);
else
return s;
}
/*
================
TexMgr_MipMapW
================
*/
static unsigned *TexMgr_MipMapW (unsigned *data, int width, int height)
{
int i, size;
byte *out, *in;
out = in = (byte *)data;
size = (width*height)>>1;
for (i = 0; i < size; i++, out += 4, in += 8)
{
out[0] = (in[0] + in[4])>>1;
out[1] = (in[1] + in[5])>>1;
out[2] = (in[2] + in[6])>>1;
out[3] = (in[3] + in[7])>>1;
}
return data;
}
/*
================
TexMgr_MipMapH
================
*/
static unsigned *TexMgr_MipMapH (unsigned *data, int width, int height)
{
int i, j;
byte *out, *in;
out = in = (byte *)data;
height>>=1;
width<<=2;
for (i = 0; i < height; i++, in += width)
{
for (j = 0; j < width; j += 4, out += 4, in += 4)
{
out[0] = (in[0] + in[width+0])>>1;
out[1] = (in[1] + in[width+1])>>1;
out[2] = (in[2] + in[width+2])>>1;
out[3] = (in[3] + in[width+3])>>1;
}
}
return data;
}
/*
================
TexMgr_ResampleTexture -- bilinear resample
================
*/
static unsigned *TexMgr_ResampleTexture (unsigned *in, int inwidth, int inheight, qboolean alpha)
{
byte *nwpx, *nepx, *swpx, *sepx, *dest;
unsigned xfrac, yfrac, x, y, modx, mody, imodx, imody, injump, outjump;
unsigned *out;
int i, j, outwidth, outheight;
if (inwidth == TexMgr_Pad(inwidth) && inheight == TexMgr_Pad(inheight))
return in;
outwidth = TexMgr_Pad(inwidth);
outheight = TexMgr_Pad(inheight);
out = (unsigned *) Hunk_Alloc(outwidth*outheight*4);
xfrac = ((inwidth-1) << 16) / (outwidth-1);
yfrac = ((inheight-1) << 16) / (outheight-1);
y = outjump = 0;
for (i = 0; i < outheight; i++)
{
mody = (y>>8) & 0xFF;
imody = 256 - mody;
injump = (y>>16) * inwidth;
x = 0;
for (j = 0; j < outwidth; j++)
{
modx = (x>>8) & 0xFF;
imodx = 256 - modx;
nwpx = (byte *)(in + (x>>16) + injump);
nepx = nwpx + 4;
swpx = nwpx + inwidth*4;
sepx = swpx + 4;
dest = (byte *)(out + outjump + j);
dest[0] = (nwpx[0]*imodx*imody + nepx[0]*modx*imody + swpx[0]*imodx*mody + sepx[0]*modx*mody)>>16;
dest[1] = (nwpx[1]*imodx*imody + nepx[1]*modx*imody + swpx[1]*imodx*mody + sepx[1]*modx*mody)>>16;
dest[2] = (nwpx[2]*imodx*imody + nepx[2]*modx*imody + swpx[2]*imodx*mody + sepx[2]*modx*mody)>>16;
if (alpha)
dest[3] = (nwpx[3]*imodx*imody + nepx[3]*modx*imody + swpx[3]*imodx*mody + sepx[3]*modx*mody)>>16;
else
dest[3] = 255;
x += xfrac;
}
outjump += outwidth;
y += yfrac;
}
return out;
}
/*
===============
TexMgr_AlphaEdgeFix
eliminate pink edges on sprites, etc.
operates in place on 32bit data
===============
*/
static void TexMgr_AlphaEdgeFix (byte *data, int width, int height)
{
int i, j, n = 0, b, c[3] = {0,0,0},
lastrow, thisrow, nextrow,
lastpix, thispix, nextpix;
byte *dest = data;
for (i = 0; i < height; i++)
{
lastrow = width * 4 * ((i == 0) ? height-1 : i-1);
thisrow = width * 4 * i;
nextrow = width * 4 * ((i == height-1) ? 0 : i+1);
for (j = 0; j < width; j++, dest += 4)
{
if (dest[3]) //not transparent
continue;
lastpix = 4 * ((j == 0) ? width-1 : j-1);
thispix = 4 * j;
nextpix = 4 * ((j == width-1) ? 0 : j+1);
b = lastrow + lastpix; if (data[b+3]) {c[0] += data[b]; c[1] += data[b+1]; c[2] += data[b+2]; n++;}
b = thisrow + lastpix; if (data[b+3]) {c[0] += data[b]; c[1] += data[b+1]; c[2] += data[b+2]; n++;}
b = nextrow + lastpix; if (data[b+3]) {c[0] += data[b]; c[1] += data[b+1]; c[2] += data[b+2]; n++;}
b = lastrow + thispix; if (data[b+3]) {c[0] += data[b]; c[1] += data[b+1]; c[2] += data[b+2]; n++;}
b = nextrow + thispix; if (data[b+3]) {c[0] += data[b]; c[1] += data[b+1]; c[2] += data[b+2]; n++;}
b = lastrow + nextpix; if (data[b+3]) {c[0] += data[b]; c[1] += data[b+1]; c[2] += data[b+2]; n++;}
b = thisrow + nextpix; if (data[b+3]) {c[0] += data[b]; c[1] += data[b+1]; c[2] += data[b+2]; n++;}
b = nextrow + nextpix; if (data[b+3]) {c[0] += data[b]; c[1] += data[b+1]; c[2] += data[b+2]; n++;}
//average all non-transparent neighbors
if (n)
{
dest[0] = (byte)(c[0]/n);
dest[1] = (byte)(c[1]/n);
dest[2] = (byte)(c[2]/n);
n = c[0] = c[1] = c[2] = 0;
}
}
}
}
/*
===============
TexMgr_PadEdgeFixW -- special case of AlphaEdgeFix for textures that only need it because they were padded
operates in place on 32bit data, and expects unpadded height and width values
===============
*/
static void TexMgr_PadEdgeFixW (byte *data, int width, int height)
{
byte *src, *dst;
int i, padw, padh;
padw = TexMgr_PadConditional(width);
padh = TexMgr_PadConditional(height);
//copy last full column to first empty column, leaving alpha byte at zero
src = data + (width - 1) * 4;
for (i = 0; i < padh; i++)
{
src[4] = src[0];
src[5] = src[1];
src[6] = src[2];
src += padw * 4;
}
//copy first full column to last empty column, leaving alpha byte at zero
src = data;
dst = data + (padw - 1) * 4;
for (i = 0; i < padh; i++)
{
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
src += padw * 4;
dst += padw * 4;
}
}
/*
===============
TexMgr_PadEdgeFixH -- special case of AlphaEdgeFix for textures that only need it because they were padded
operates in place on 32bit data, and expects unpadded height and width values
===============
*/
static void TexMgr_PadEdgeFixH (byte *data, int width, int height)
{
byte *src, *dst;
int i, padw, padh;
padw = TexMgr_PadConditional(width);
padh = TexMgr_PadConditional(height);
//copy last full row to first empty row, leaving alpha byte at zero
dst = data + height * padw * 4;
src = dst - padw * 4;
for (i = 0; i < padw; i++)
{
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
src += 4;
dst += 4;
}
//copy first full row to last empty row, leaving alpha byte at zero
dst = data + (padh - 1) * padw * 4;
src = data;
for (i = 0; i < padw; i++)
{
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
src += 4;
dst += 4;
}
}
/*
================
TexMgr_8to32
================
*/
static unsigned *TexMgr_8to32 (byte *in, int pixels, unsigned int *usepal)
{
int i;
unsigned *out, *data;
out = data = (unsigned *) Hunk_Alloc(pixels*4);
for (i = 0; i < pixels; i++)
*out++ = usepal[*in++];
return data;
}
/*
================
TexMgr_PadImageW -- return image with width padded up to power-of-two dimentions
================
*/
static byte *TexMgr_PadImageW (byte *in, int width, int height, byte padbyte)
{
int i, j, outwidth;
byte *out, *data;
if (width == TexMgr_Pad(width))
return in;
outwidth = TexMgr_Pad(width);
out = data = (byte *) Hunk_Alloc(outwidth*height);
for (i = 0; i < height; i++)
{
for (j = 0; j < width; j++)
*out++ = *in++;
for ( ; j < outwidth; j++)
*out++ = padbyte;
}
return data;
}
/*
================
TexMgr_PadImageH -- return image with height padded up to power-of-two dimentions
================
*/
static byte *TexMgr_PadImageH (byte *in, int width, int height, byte padbyte)
{
int i, srcpix, dstpix;
byte *data, *out;
if (height == TexMgr_Pad(height))
return in;
srcpix = width * height;
dstpix = width * TexMgr_Pad(height);
out = data = (byte *) Hunk_Alloc(dstpix);
for (i = 0; i < srcpix; i++)
*out++ = *in++;
for ( ; i < dstpix; i++)
*out++ = padbyte;
return data;
}
/*
================