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quakespasm/Quake/gl_texmgr.cpp
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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 <cstring>
#include "quakedef.hpp"
static const int gl_solid_format = 3;
static const int gl_alpha_format = 4;
static convar gl_texturemode{"gl_texturemode", "", {.archive = true}};
static convar gl_texture_anisotropy{"gl_texture_anisotropy", "1", {.archive = true}};
static convar gl_max_size{"gl_max_size", "0"};
static convar gl_picmip{"gl_picmip", "0"};
static GLint gl_hardware_maxsize;
#define MAX_GLTEXTURES 4096
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];
/*
================================================================================
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)std::size(glmodes)
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(convar *var) {
gltexture_t *glt;
int i;
for (i = 0; i < NUM_GLMODES; i++) {
if (!std::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)) {
gl_texturemode.set(glmodes[i].name);
return;
}
}
i = atoi(gl_texturemode.string);
if (i >= 1 && i <= NUM_GLMODES) {
gl_texturemode.set(glmodes[i - 1].name);
return;
}
Con_Printf("\"%s\" is not a valid texturemode\n", gl_texturemode.string);
gl_texturemode.set(glmodes[glmode_idx].name);
}
/*
===============
TexMgr_Anisotropy_f -- called when gl_texture_anisotropy changes
===============
*/
static void TexMgr_Anisotropy_f(convar *var) {
if (gl_texture_anisotropy.value < 1) {
gl_texture_anisotropy.set("1");
} else if (gl_texture_anisotropy.value > gl_max_anisotropy) {
gl_texture_anisotropy.set_value(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 * (convar::variable_value("vid_bpp").value_or(0.0) / 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, ':')) != NULL) *c = '_';
while ((c = strchr(tempname, '/')) != NULL) *c = '_';
while ((c = strchr(tempname, '*')) != NULL) *c = '_';
q_snprintf(tganame, sizeof(tganame), "imagedump/%s.tga", tempname);
GL_Bind(glt);
glPixelStorei(GL_PACK_ALIGNMENT, 1); /* for widths that aren't a multiple of 4 */
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 * (convar::variable_value("vid_bpp").value_or(0.0) / 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);
//ericw -- workaround for preventing TexMgr_FreeTexture during TexMgr_ReloadImages
static bool in_reload_images;
/*
================
TexMgr_FreeTexture
================
*/
void TexMgr_FreeTexture(gltexture_t *kill) {
gltexture_t *glt;
if (in_reload_images)
return;
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);
if (!fread(pal, 768, 1, f))
Sys_Error("Failed reading gfx/palette.lmp");
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 oldsize = gl_warpimagesize;
int mark;
gltexture_t *glt;
byte *dummy;
//
// find the new correct size
//
gl_warpimagesize = TexMgr_SafeTextureSize(512);
while (gl_warpimagesize > vid.width)
gl_warpimagesize >>= 1;
while (gl_warpimagesize > vid.height)
gl_warpimagesize >>= 1;
// ericw -- removed early exit if (gl_warpimagesize == oldsize).
// after vid_restart TexMgr_ReloadImage reloads textures
// to tx->source_width/source_height, which might not match oldsize.
// fixes: https://sourceforge.net/p/quakespasm/bugs/13/
//
// 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
// 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();
gl_max_size.inscribe();
gl_picmip.inscribe();
gl_texture_anisotropy.inscribe();
gl_texture_anisotropy.set_callback(&TexMgr_Anisotropy_f);
gl_texturemode.string = glmodes[glmode_idx].name;
gl_texturemode.inscribe();
gl_texturemode.set_callback(&TexMgr_TextureMode_f);
command::add("gl_describetexturemodes", &TexMgr_DescribeTextureModes_f);
command::add("imagelist", &TexMgr_Imagelist_f);
command::add("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) {
int p = (int) gl_max_size.value;
if (!gl_texture_NPOT)
s = TexMgr_Pad(s);
if (p > 0) {
p = TexMgr_Pad(p);
if (p < s) s = p;
}
if (s > gl_hardware_maxsize)
s = gl_hardware_maxsize;
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);
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, bool 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;
}
/*
================
TexMgr_LoadImage32 -- handles 32bit source data
================
*/
static void TexMgr_LoadImage32(gltexture_t *glt, unsigned *data) {
int internalformat, miplevel, mipwidth, mipheight, picmip;
if (!gl_texture_NPOT) {
// resample up
data = TexMgr_ResampleTexture(data, glt->width, glt->height, glt->flags & TEXPREF_ALPHA);
glt->width = TexMgr_Pad(glt->width);
glt->height = TexMgr_Pad(glt->height);
}
// mipmap down
picmip = (glt->flags & TEXPREF_NOPICMIP) ? 0 : std::max((int)gl_picmip.value, 0);
mipwidth = TexMgr_SafeTextureSize(glt->width >> picmip);
mipheight = TexMgr_SafeTextureSize(glt->height >> picmip);
while ((int) glt->width > mipwidth) {
TexMgr_MipMapW(data, glt->width, glt->height);
glt->width >>= 1;
if (glt->flags & TEXPREF_ALPHA)
TexMgr_AlphaEdgeFix((byte *) data, glt->width, glt->height);
}
while ((int) glt->height > mipheight) {
TexMgr_MipMapH(data, glt->width, glt->height);
glt->height >>= 1;
if (glt->flags & TEXPREF_ALPHA)
TexMgr_AlphaEdgeFix((byte *) data, glt->width, glt->height);
}
// upload
GL_Bind(glt);
internalformat = (glt->flags & TEXPREF_ALPHA) ? gl_alpha_format : gl_solid_format;
glTexImage2D(GL_TEXTURE_2D, 0, internalformat, glt->width, glt->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
// upload mipmaps
if (glt->flags & TEXPREF_MIPMAP && !(glt->flags & TEXPREF_WARPIMAGE)) // warp image mipmaps are generated later
{
mipwidth = glt->width;
mipheight = glt->height;
for (miplevel = 1; mipwidth > 1 || mipheight > 1; miplevel++) {
if (mipwidth > 1) {
TexMgr_MipMapW(data, mipwidth, mipheight);
mipwidth >>= 1;
}
if (mipheight > 1) {
TexMgr_MipMapH(data, mipwidth, mipheight);
mipheight >>= 1;
}
glTexImage2D(GL_TEXTURE_2D, miplevel, internalformat, mipwidth, mipheight, 0, GL_RGBA, GL_UNSIGNED_BYTE,
data);
}
}
// set filter modes
TexMgr_SetFilterModes(glt);
}
/*
================
TexMgr_LoadImage8 -- handles 8bit source data, then passes it to LoadImage32
================
*/
static void TexMgr_LoadImage8(gltexture_t *glt, byte *data) {
extern convar gl_fullbrights;
bool padw = false, padh = false;
byte padbyte;
unsigned int *usepal;
int i;
// HACK HACK HACK -- taken from tomazquake
if (strstr(glt->name, "shot1sid") &&
glt->width == 32 && glt->height == 32 &&
CRC_Block(data, 1024) == 65393) {
// This texture in b_shell1.bsp has some of the first 32 pixels painted white.
// They are invisible in software, but look really ugly in GL. So we just copy
// 32 pixels from the bottom to make it look nice.
memcpy(data, data + 32 * 31, 32);
}
// detect false alpha cases
if (glt->flags & TEXPREF_ALPHA && !(glt->flags & TEXPREF_CONCHARS)) {
for (i = 0; i < (int) (glt->width * glt->height); i++)
if (data[i] == 255) //transparent index
break;
if (i == (int) (glt->width * glt->height))
glt->flags -= TEXPREF_ALPHA;
}
// choose palette and padbyte
if (glt->flags & TEXPREF_FULLBRIGHT) {
if (glt->flags & TEXPREF_ALPHA)
usepal = d_8to24table_fbright_fence;
else
usepal = d_8to24table_fbright;
padbyte = 0;
} else if (glt->flags & TEXPREF_NOBRIGHT && gl_fullbrights.value) {
if (glt->flags & TEXPREF_ALPHA)
usepal = d_8to24table_nobright_fence;
else
usepal = d_8to24table_nobright;
padbyte = 0;
} else if (glt->flags & TEXPREF_CONCHARS) {
usepal = d_8to24table_conchars;
padbyte = 0;
} else {
usepal = d_8to24table;
padbyte = 255;
}
// pad each dimention, but only if it's not going to be downsampled later
if (glt->flags & TEXPREF_PAD) {
if ((int) glt->width < TexMgr_SafeTextureSize(glt->width)) {
data = TexMgr_PadImageW(data, glt->width, glt->height, padbyte);
glt->width = TexMgr_Pad(glt->width);
padw = true;
}
if ((int) glt->height < TexMgr_SafeTextureSize(glt->height)) {
data = TexMgr_PadImageH(data, glt->width, glt->height, padbyte);
glt->height = TexMgr_Pad(glt->height);
padh = true;
}
}
// convert to 32bit
data = (byte *) TexMgr_8to32(data, glt->width * glt->height, usepal);
// fix edges
if (glt->flags & TEXPREF_ALPHA)
TexMgr_AlphaEdgeFix(data, glt->width, glt->height);
else {
if (padw)
TexMgr_PadEdgeFixW(data, glt->source_width, glt->source_height);
if (padh)
TexMgr_PadEdgeFixH(data, glt->source_width, glt->source_height);
}
// upload it
TexMgr_LoadImage32(glt, (unsigned *) data);
}
/*
================
TexMgr_LoadLightmap -- handles lightmap data
================
*/
static void TexMgr_LoadLightmap(gltexture_t *glt, byte *data) {
const bool wide10bits = !!r_lightmapwide.value;
const GLenum type = wide10bits ? GL_UNSIGNED_INT_10_10_10_2 : GL_UNSIGNED_BYTE;
const GLint internalfmt = wide10bits ? GL_RGB10_A2 : lightmap_bytes;
// upload it
GL_Bind(glt);
glTexImage2D(GL_TEXTURE_2D, 0, internalfmt, glt->width, glt->height, 0, gl_lightmap_format, type, data);
// set filter modes
TexMgr_SetFilterModes(glt);
}
/*
================
TexMgr_LoadImage -- the one entry point for loading all textures
================
*/
gltexture_t *TexMgr_LoadImage(qmodel_t *owner, const char *name, int width, int height, enum srcformat format,
byte *data, const char *source_file, src_offset_t source_offset, unsigned flags) {
unsigned short crc;
gltexture_t *glt;
int mark;
if (isDedicated)
return NULL;
// cache check
switch (format) {
case SRC_INDEXED:
crc = CRC_Block(data, width * height);
break;
case SRC_LIGHTMAP:
crc = CRC_Block(data, width * height * lightmap_bytes);
break;
case SRC_RGBA:
crc = CRC_Block(data, width * height * 4);
break;
default: /* not reachable but avoids compiler warnings */
crc = 0;
}
if ((flags & TEXPREF_OVERWRITE) && (glt = TexMgr_FindTexture(owner, name))) {
if (glt->source_crc == crc)
return glt;
} else
glt = TexMgr_NewTexture();
// copy data
glt->owner = owner;
q_strlcpy(glt->name, name, sizeof(glt->name));
glt->width = width;
glt->height = height;
glt->flags = flags;
glt->shirt = -1;
glt->pants = -1;
q_strlcpy(glt->source_file, source_file, sizeof(glt->source_file));
glt->source_offset = source_offset;
glt->source_format = format;
glt->source_width = width;
glt->source_height = height;
glt->source_crc = crc;
//upload it
mark = Hunk_LowMark();
switch (glt->source_format) {
case SRC_INDEXED:
TexMgr_LoadImage8(glt, data);
break;
case SRC_LIGHTMAP:
TexMgr_LoadLightmap(glt, data);
break;
case SRC_RGBA:
TexMgr_LoadImage32(glt, (unsigned *) data);
break;
}
Hunk_FreeToLowMark(mark);
return glt;
}
/*
================================================================================
COLORMAPPING AND TEXTURE RELOADING
================================================================================
*/
/*
================
TexMgr_ReloadImage -- reloads a texture, and colormaps it if needed
================
*/
void TexMgr_ReloadImage(gltexture_t *glt, int shirt, int pants) {
byte translation[256];
byte *src, *dst, *data = NULL, *translated;
int mark, size, i;
//
// get source data
//
mark = Hunk_LowMark();
if (glt->source_file[0] && glt->source_offset) {
//lump inside file
FILE *f;
int sz;
COM_FOpenFile(glt->source_file, &f, NULL);
if (!f) goto invalid;
fseek(f, glt->source_offset, SEEK_CUR);
size = glt->source_width * glt->source_height;
/* should be SRC_INDEXED, but no harm being paranoid: */
if (glt->source_format == SRC_RGBA) {
size *= 4;
} else if (glt->source_format == SRC_LIGHTMAP) {
size *= lightmap_bytes;
}
data = (byte *) Hunk_Alloc(size);
sz = (int) fread(data, 1, size, f);
fclose(f);
if (sz != size) {
Hunk_FreeToLowMark(mark);
Host_Error("Read error for %s", glt->name);
}
} else if (glt->source_file[0] && !glt->source_offset) {
data = Image_LoadImage(glt->source_file, (int *) &glt->source_width, (int *) &glt->source_height); //simple file
} else if (!glt->source_file[0] && glt->source_offset) {
data = (byte *) glt->source_offset; //image in memory
}
if (!data) {
invalid:
Con_Printf("TexMgr_ReloadImage: invalid source for %s\n", glt->name);
Hunk_FreeToLowMark(mark);
return;
}
glt->width = glt->source_width;
glt->height = glt->source_height;
//
// apply shirt and pants colors
//
// if shirt and pants are -1,-1, use existing shirt and pants colors
// if existing shirt and pants colors are -1,-1, don't bother colormapping
if (shirt > -1 && pants > -1) {
if (glt->source_format == SRC_INDEXED) {
glt->shirt = shirt;
glt->pants = pants;
} else
Con_Printf("TexMgr_ReloadImage: can't colormap a non SRC_INDEXED texture: %s\n", glt->name);
}
if (glt->shirt > -1 && glt->pants > -1) {
//create new translation table
for (i = 0; i < 256; i++)
translation[i] = i;
shirt = glt->shirt * 16;
if (shirt < 128) {
for (i = 0; i < 16; i++)
translation[TOP_RANGE + i] = shirt + i;
} else {
for (i = 0; i < 16; i++)
translation[TOP_RANGE + i] = shirt + 15 - i;
}
pants = glt->pants * 16;
if (pants < 128) {
for (i = 0; i < 16; i++)
translation[BOTTOM_RANGE + i] = pants + i;
} else {
for (i = 0; i < 16; i++)
translation[BOTTOM_RANGE + i] = pants + 15 - i;
}
//translate texture
size = glt->width * glt->height;
dst = translated = (byte *) Hunk_Alloc(size);
src = data;
for (i = 0; i < size; i++)
*dst++ = translation[*src++];
data = translated;
}
//
// upload it
//
switch (glt->source_format) {
case SRC_INDEXED:
TexMgr_LoadImage8(glt, data);
break;
case SRC_LIGHTMAP:
TexMgr_LoadLightmap(glt, data);
break;
case SRC_RGBA:
TexMgr_LoadImage32(glt, (unsigned *) data);
break;
}
Hunk_FreeToLowMark(mark);
}
/*
================
TexMgr_ReloadImages -- reloads all texture images. called only by vid_restart
================
*/
void TexMgr_ReloadImages(void) {
gltexture_t *glt;
// ericw -- tricky bug: if the hunk is almost full, an allocation in TexMgr_ReloadImage
// triggers cache items to be freed, which calls back into TexMgr to free the
// texture. If this frees 'glt' in the loop below, the active_gltextures
// list gets corrupted.
// A test case is jam3_tronyn.bsp with -heapsize 65536, and do several mode
// switches/fullscreen toggles
// 2015-09-04 -- Cache_Flush workaround was causing issues (http://sourceforge.net/p/quakespasm/bugs/10/)
// switching to a boolean flag.
in_reload_images = true;
for (glt = active_gltextures; glt; glt = glt->next) {
glGenTextures(1, &glt->texnum);
TexMgr_ReloadImage(glt, -1, -1);
}
in_reload_images = false;
}
/*
================
TexMgr_ReloadNobrightImages -- reloads all texture that were loaded with the nobright palette. called when gl_fullbrights changes
================
*/
void TexMgr_ReloadNobrightImages(void) {
gltexture_t *glt;
for (glt = active_gltextures; glt; glt = glt->next)
if (glt->flags & TEXPREF_NOBRIGHT)
TexMgr_ReloadImage(glt, -1, -1);
}
/*
================================================================================
TEXTURE BINDING / TEXTURE UNIT SWITCHING
================================================================================
*/
static GLuint currenttexture[3] = {GL_UNUSED_TEXTURE, GL_UNUSED_TEXTURE, GL_UNUSED_TEXTURE};
// to avoid unnecessary texture sets
static GLenum currenttarget = GL_TEXTURE0_ARB;
bool mtexenabled = false;
/*
================
GL_SelectTexture -- johnfitz -- rewritten
================
*/
void GL_SelectTexture(GLenum target) {
if (target == currenttarget)
return;
GL_SelectTextureFunc(target);
currenttarget = target;
}
/*
================
GL_DisableMultitexture -- selects texture unit 0
================
*/
void GL_DisableMultitexture(void) {
if (mtexenabled) {
glDisable(GL_TEXTURE_2D);
GL_SelectTexture(GL_TEXTURE0_ARB);
mtexenabled = false;
}
}
/*
================
GL_EnableMultitexture -- selects texture unit 1
================
*/
void GL_EnableMultitexture(void) {
if (gl_mtexable) {
GL_SelectTexture(GL_TEXTURE1_ARB);
glEnable(GL_TEXTURE_2D);
mtexenabled = true;
}
}
/*
================
GL_Bind -- johnfitz -- heavy revision
================
*/
void GL_Bind(gltexture_t *texture) {
if (!texture)
texture = nulltexture;
if (texture->texnum != currenttexture[currenttarget - GL_TEXTURE0_ARB]) {
currenttexture[currenttarget - GL_TEXTURE0_ARB] = texture->texnum;
glBindTexture(GL_TEXTURE_2D, texture->texnum);
texture->visframe = r_framecount;
}
}
/*
================
GL_DeleteTexture -- ericw
Wrapper around glDeleteTextures that also clears the given texture number
from our per-TMU cached texture binding table.
================
*/
static void GL_DeleteTexture(gltexture_t *texture) {
glDeleteTextures(1, &texture->texnum);
if (texture->texnum == currenttexture[0]) currenttexture[0] = GL_UNUSED_TEXTURE;
if (texture->texnum == currenttexture[1]) currenttexture[1] = GL_UNUSED_TEXTURE;
if (texture->texnum == currenttexture[2]) currenttexture[2] = GL_UNUSED_TEXTURE;
texture->texnum = 0;
}
/*
================
GL_ClearBindings -- ericw
Invalidates cached bindings, so the next GL_Bind calls for each TMU will
make real glBindTexture calls.
Call this after changing the binding outside of GL_Bind.
================
*/
void GL_ClearBindings(void) {
int i;
for (i = 0; i < 3; i++) {
currenttexture[i] = GL_UNUSED_TEXTURE;
}
}
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