diff options
Diffstat (limited to 'QW/client/gl_draw.c')
| -rw-r--r-- | QW/client/gl_draw.c | 1378 |
1 files changed, 1378 insertions, 0 deletions
diff --git a/QW/client/gl_draw.c b/QW/client/gl_draw.c new file mode 100644 index 0000000..07d8411 --- /dev/null +++ b/QW/client/gl_draw.c @@ -0,0 +1,1378 @@ +/* +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" + +extern unsigned char d_15to8table[65536]; +extern cvar_t crosshair, cl_crossx, cl_crossy, crosshaircolor; + +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; +int cs_texture; // crosshair texture + +static byte cs_data[64] = { + 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, 0xff, + 0xfe, 0xff, 0xfe, 0xff, 0xfe, 0xff, 0xfe, 0xff, + 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff +}; + + +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; +} 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 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*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 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"); + return 0; +} + +int scrap_uploads; + +void Scrap_Upload (void) +{ + scrap_uploads++; + GL_Bind(scrap_texnum); + GL_Upload8 (scrap_texels[0], 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; + int x; + char ver[40]; + glpic_t *gl; + int start; + byte *ncdata; + + 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) || + !Q_strncasecmp ((char *)gl_renderer, "Mesa",4)) + 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); +// Draw_CrosshairAdjust(); + cs_texture = GL_LoadTexture ("crosshair", 8, 8, cs_data, false, true); + + start = Hunk_LowMark (); + + cb = (qpic_t *)COM_LoadHunkFile ("gfx/conback.lmp"); + if (!cb) + Sys_Error ("Couldn't load gfx/conback.lmp"); + SwapPic (cb); + + sprintf (ver, "%4.2f", VERSION); + dest = cb->data + 320 + 320*186 - 11 - 8*strlen(ver); + for (x=0 ; x<strlen(ver) ; 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); + gl->sl = 0; + gl->sh = 1; + gl->tl = 0; + gl->th = 1; + conback->width = vid.conwidth; + conback->height = vid.conheight; + + // 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) +{ + 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_Alt_String +================ +*/ +void Draw_Alt_String (int x, int y, char *str) +{ + while (*str) + { + Draw_Character (x, y, (*str) | 0x80); + str++; + x += 8; + } +} + +void Draw_Crosshair(void) +{ + int x, y; + extern vrect_t scr_vrect; + unsigned char *pColor; + + if (crosshair.value == 2) { + x = scr_vrect.x + scr_vrect.width/2 - 3 + cl_crossx.value; + y = scr_vrect.y + scr_vrect.height/2 - 3 + cl_crossy.value; + + glTexEnvf ( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ); + pColor = (unsigned char *) &d_8to24table[(byte) crosshaircolor.value]; + glColor4ubv ( pColor ); + GL_Bind (cs_texture); + + glBegin (GL_QUADS); + glTexCoord2f (0, 0); + glVertex2f (x - 4, y - 4); + glTexCoord2f (1, 0); + glVertex2f (x+12, y-4); + glTexCoord2f (1, 1); + glVertex2f (x+12, y+12); + glTexCoord2f (0, 1); + glVertex2f (x - 4, y+12); + glEnd (); + + glTexEnvf ( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE ); + } else if (crosshair.value) + Draw_Character (scr_vrect.x + scr_vrect.width/2-4 + cl_crossx.value, + scr_vrect.y + scr_vrect.height/2-4 + cl_crossy.value, + '+'); +} + + +/* +================ +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_Pic +============= +*/ +void Draw_Pic (int x, int y, qpic_t *pic) +{ + 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_AlphaPic +============= +*/ +void Draw_AlphaPic (int x, int y, qpic_t *pic, float alpha) +{ + 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); +} + +void Draw_SubPic(int x, int y, qpic_t *pic, int srcx, int srcy, int width, int height) +{ + glpic_t *gl; + float newsl, newtl, newsh, newth; + float oldglwidth, oldglheight; + + if (scrap_dirty) + Scrap_Upload (); + gl = (glpic_t *)pic->data; + + oldglwidth = gl->sh - gl->sl; + oldglheight = gl->th - gl->tl; + + newsl = gl->sl + (srcx*oldglwidth)/pic->width; + newsh = newsl + (width*oldglwidth)/pic->width; + + newtl = gl->tl + (srcy*oldglheight)/pic->height; + newth = newtl + (height*oldglheight)/pic->height; + + glColor4f (1,1,1,1); + GL_Bind (gl->texnum); + glBegin (GL_QUADS); + glTexCoord2f (newsl, newtl); + glVertex2f (x, y); + glTexCoord2f (newsh, newtl); + glVertex2f (x+width, y); + glTexCoord2f (newsh, newth); + glVertex2f (x+width, y+height); + glTexCoord2f (newsl, newth); + glVertex2f (x, y+height); + glEnd (); +} + +/* +============= +Draw_TransPic +============= +*/ +void Draw_TransPic (int x, int y, qpic_t *pic) +{ + + 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) +{ + char ver[80]; + int x, i; + int y; + + 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); + + // hack the version number directly into the pic +// y = lines-186; + y = lines-14; + if (!cls.download) { +#ifdef __linux__ + sprintf (ver, "LinuxGL (%4.2f) QuakeWorld", LINUX_VERSION); +#else + sprintf (ver, "GL (%4.2f) QuakeWorld", GLQUAKE_VERSION); +#endif + x = vid.conwidth - (strlen(ver)*8 + 11) - (vid.conwidth*8/320)*7; + for (i=0 ; i<strlen(ver) ; i++) + Draw_Character (x + i * 8, y, ver[i] | 0x80); + } +} + + +/* +============= +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; + byte *out; + unsigned short r,g,b; + byte *at1, *at2, *at3, *at4; + + 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 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); + } +} + +extern qboolean VID_Is8bit(); + +/* +=============== +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 i; + gltexture_t *glt; + + // 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 (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 ); + + GL_Upload8 (data, width, height, mipmap, alpha); + + texture_extension_number++; + + return texture_extension_number-1; +} + +/* +================ +GL_LoadPicTexture +================ +*/ +int GL_LoadPicTexture (qpic_t *pic) +{ + return GL_LoadTexture ("", pic->width, pic->height, pic->data, false, true); +} + +/****************************************/ + +static GLenum oldtarget = TEXTURE0_SGIS; + +void GL_SelectTexture (GLenum target) +{ + if (!gl_mtexable) + return; +#ifndef __linux__ // no multitexture under Linux yet + qglSelectTextureSGIS(target); +#endif + if (target == oldtarget) + return; + cnttextures[oldtarget-TEXTURE0_SGIS] = currenttexture; + currenttexture = cnttextures[target-TEXTURE0_SGIS]; + oldtarget = target; +} |