dxx-rebirth/video/ogl_gr.c
2001-01-29 13:47:52 +00:00

633 lines
15 KiB
C

/*
* $Source: /cvs/cvsroot/d2x/video/ogl_gr.c,v $
* $Revision: 1.4 $
* $Author: bradleyb $
* $Date: 2001-01-29 13:47:52 $
*
* // OGL video functions. - Added 9/15/99 Matthew Mueller
*
* $Log: not supported by cvs2svn $
*/
#ifdef HAVE_CONFIG_H
#include <conf.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef __WINDOWS__
#include <windows.h>
#endif
//#include <GL/gl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "game.h"
#include "text.h"
#include "gr.h"
#include "gamefont.h"
#include "grdef.h"
#include "palette.h"
#include "u_mem.h"
#include "error.h"
#include "inferno.h"
#include "screens.h"
#include "strutil.h"
#include "mono.h"
#include "args.h"
#include "key.h"
#include "gamefont.h"
#define DECLARE_VARS
#include "ogl_init.h"
#include <GL/glu.h>
int ogl_voodoohack=0;
int gr_installed = 0;
void gr_palette_clear(); // Function prototype for gr_init;
int gl_initialized=0;
int gl_reticle=1;
int ogl_fullscreen=0;
int gr_check_fullscreen(void){
return ogl_fullscreen;
}
void gr_do_fullscreen(int f){
if (ogl_voodoohack)
ogl_fullscreen=1;//force fullscreen mode on voodoos.
else
ogl_fullscreen=f;
if (gl_initialized){
ogl_do_fullscreen_internal();
}
}
int gr_toggle_fullscreen(void){
gr_do_fullscreen(!ogl_fullscreen);
// grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
return ogl_fullscreen;
}
void ogl_init_state(void){
/* select clearing (background) color */
glClearColor(0.0, 0.0, 0.0, 0.0);
glShadeModel(GL_SMOOTH);
/* initialize viewing values */
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
glScalef(1.0, -1.0, 1.0);
glTranslatef(0.0, -1.0, 0.0);
gr_palette_step_up(0,0,0);//in case its left over from in game
}
int last_screen_mode=-1;
void ogl_set_screen_mode(void){
if (last_screen_mode==Screen_mode)
return;
OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
// OGL_VIEWPORT(grd_curcanv->cv_bitmap.bm_x,grd_curcanv->cv_bitmap.bm_y,grd_curcanv->cv_bitmap.bm_w,grd_curcanv->cv_bitmap.bm_h);
if (Screen_mode==SCREEN_GAME){
glDrawBuffer(GL_BACK);
}else{
glClearColor(0.0, 0.0, 0.0, 0.0);
glDrawBuffer(GL_FRONT);
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();//clear matrix
glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();//clear matrix
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
last_screen_mode=Screen_mode;
}
void gr_update()
{
if (gl_initialized){
if(Screen_mode != SCREEN_GAME){
glFlush();
}
}
}
const char *gl_vendor,*gl_renderer,*gl_version,*gl_extensions;
void ogl_get_verinfo(void){
int t;
gl_vendor=glGetString(GL_VENDOR);
gl_renderer=glGetString(GL_RENDERER);
gl_version=glGetString(GL_VERSION);
gl_extensions=glGetString(GL_EXTENSIONS);
printf("gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
ogl_intensity4_ok=1;ogl_luminance4_alpha4_ok=1;ogl_rgba2_ok=1;
//add driver specific hacks here. whee.
if (stricmp(gl_renderer,"Mesa NVIDIA RIVA 1.0\n")==0 && stricmp(gl_version,"1.2 Mesa 3.0")==0){
ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
}
//allow overriding of stuff.
if ((t=FindArg("-gl_intensity4_ok"))){
ogl_intensity4_ok=atoi(Args[t+1]);
}
if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
}
if ((t=FindArg("-gl_rgba2_ok"))){
ogl_rgba2_ok=atoi(Args[t+1]);
}
if ((t=FindArg("-gl_readpixels_ok"))){
ogl_readpixels_ok=atoi(Args[t+1]);
}
printf("gl_intensity4:%i gl_luminance4_alpha4:%i gl_rgba2:%i gl_readpixels:%i\n",ogl_intensity4_ok,ogl_luminance4_alpha4_ok,ogl_rgba2_ok,ogl_readpixels_ok);
}
int gr_set_mode(u_int32_t mode)
{
unsigned int w,h;
#ifdef NOGRAPH
return 0;
#endif
// mode=0;
if (mode<=0)
return 0;
w=SM_W(mode);
h=SM_H(mode);
//if (screen != NULL) gr_palette_clear();
// ogl_init_state();
memset( grd_curscreen, 0, sizeof(grs_screen));
grd_curscreen->sc_mode = mode;
grd_curscreen->sc_w = w;
grd_curscreen->sc_h = h;
grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
//grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
//grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
grd_curscreen->sc_canvas.cv_bitmap.bm_data = realloc(grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h);
gr_set_current_canvas(NULL);
//gr_enable_default_palette_loading();
ogl_init_window(w,h);//platform specific code
ogl_get_verinfo();
OGL_VIEWPORT(0,0,w,h);
ogl_set_screen_mode();
//gamefont_choose_game_font(w,h);
return 0;
}
#define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
int ogl_atotexfilti(char *a,int min){
GLstrcmptestr(a,NEAREST);
GLstrcmptestr(a,LINEAR);
if (min){//mipmaps are valid only for the min filter
GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
}
Error("unknown/invalid texture filter %s\n",a);
// return GL_NEAREST;
}
int ogl_testneedmipmaps(int i){
switch (i){
case GL_NEAREST:
case GL_LINEAR:
return 0;
case GL_NEAREST_MIPMAP_NEAREST:
case GL_NEAREST_MIPMAP_LINEAR:
case GL_LINEAR_MIPMAP_NEAREST:
case GL_LINEAR_MIPMAP_LINEAR:
return 1;
}
Error("unknown texture filter %x\n",i);
// return -1;
}
#ifdef OGL_RUNTIME_LOAD
#ifdef __WINDOWS__
char *OglLibPath="opengl32.dll";
#endif
#ifdef __LINUX__
char *OglLibPath="libGL.so";
#endif
int ogl_rt_loaded=0;
int ogl_init_load_library(void)
{
int retcode=0;
if (!ogl_rt_loaded){
int t;
if ((t=FindArg("-gl_library")))
OglLibPath=Args[t+1];
retcode = OpenGL_LoadLibrary(true);
if(retcode)
{
mprintf((0,"Opengl loaded ok\n"));
if(!glEnd)
{
Error("Opengl: Functions not imported\n");
}
}else{
Error("Opengl: error loading %s\n",OglLibPath);
}
ogl_rt_loaded=1;
}
return retcode;
}
#endif
int gr_init()
{
int mode = SM(640,480);
int retcode,t,glt=0;
// Only do this function once!
if (gr_installed==1)
return -1;
#ifdef OGL_RUNTIME_LOAD
ogl_init_load_library();
#endif
#ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
if (FindArg("-gl_voodoo")){
ogl_voodoohack=1;
gr_toggle_fullscreen();
}
if (FindArg("-fullscreen"))
gr_toggle_fullscreen();
#endif
if ((glt=FindArg("-gl_alttexmerge")))
ogl_alttexmerge=1;
if ((t=FindArg("-gl_stdtexmerge")))
if (t>=glt)//allow overriding of earlier args
ogl_alttexmerge=0;
if ((glt=FindArg("-gl_16bittextures")))
ogl_rgba_format=GL_RGB5_A1;
if ((glt=FindArg("-gl_mipmap"))){
GL_texmagfilt=GL_LINEAR;
GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
}
if ((t=FindArg("-gl_simple"))){
if (t>=glt){//allow overriding of earlier args
glt=t;
GL_texmagfilt=GL_NEAREST;
GL_texminfilt=GL_NEAREST;
}
}
if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
if (t>=glt)//allow overriding of earlier args
GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
}
if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
if (t>=glt)//allow overriding of earlier args
GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
}
GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps));
if ((t=FindArg("-gl_vidmem"))){
ogl_mem_target=atoi(Args[t+1])*1024*1024;
}
if ((t=FindArg("-gl_reticle"))){
gl_reticle=atoi(Args[t+1]);
}
//printf("ogl_mem_target=%i\n",ogl_mem_target);
ogl_init();//platform specific initialization
ogl_init_texture_list_internal();
MALLOC( grd_curscreen,grs_screen,1 );
memset( grd_curscreen, 0, sizeof(grs_screen));
grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
// Set the mode.
if ((retcode=gr_set_mode(mode)))
{
return retcode;
}
grd_curscreen->sc_canvas.cv_color = 0;
grd_curscreen->sc_canvas.cv_drawmode = 0;
grd_curscreen->sc_canvas.cv_font = NULL;
grd_curscreen->sc_canvas.cv_font_fg_color = 0;
grd_curscreen->sc_canvas.cv_font_bg_color = 0;
gr_set_current_canvas( &grd_curscreen->sc_canvas );
gr_installed = 1;
atexit(gr_close);
return 0;
}
void gr_close()
{
// mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
ogl_close();//platform specific code
if (grd_curscreen){
if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
d_free(grd_curscreen);
}
#ifdef OGL_RUNTIME_LOAD
if (ogl_rt_loaded)
OpenGL_LoadLibrary(false);
#endif
}
extern int r_upixelc;
void ogl_upixelc(int x, int y, int c){
r_upixelc++;
// printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
// if(Function_mode != FMODE_GAME){
// grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
// }else{
OGL_DISABLE(TEXTURE_2D);
glPointSize(1.0);
glBegin(GL_POINTS);
// glBegin(GL_LINES);
// ogl_pal=gr_current_pal;
glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
// ogl_pal=gr_palette;
glVertex2f((x+grd_curcanv->cv_bitmap.bm_x)/(float)last_width,1.0-(y+grd_curcanv->cv_bitmap.bm_y)/(float)last_height);
// glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
glEnd();
// }
}
void ogl_urect(int left,int top,int right,int bot){
GLfloat xo,yo,xf,yf;
int c=COLOR;
xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
OGL_DISABLE(TEXTURE_2D);
glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
glBegin(GL_QUADS);
glVertex2f(xo,yo);
glVertex2f(xo,yf);
glVertex2f(xf,yf);
glVertex2f(xf,yo);
glEnd();
}
void ogl_ulinec(int left,int top,int right,int bot,int c){
GLfloat xo,yo,xf,yf;
xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
OGL_DISABLE(TEXTURE_2D);
glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
glBegin(GL_LINES);
glVertex2f(xo,yo);
glVertex2f(xf,yf);
glEnd();
}
GLfloat last_r=0, last_g=0, last_b=0;
int do_pal_step=0;
void ogl_do_palfx(void){
// GLfloat r,g,b,a;
OGL_DISABLE(TEXTURE_2D);
if (gr_palette_faded_out){
/* glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
glColor3f(0,0,0);
// r=g=b=0.0;a=1.0;
}else{
if (do_pal_step){
//glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE,GL_ONE);
glColor3f(last_r,last_g,last_b);
// r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
}else
return;
}
glBegin(GL_QUADS);
glVertex2f(0,0);
glVertex2f(0,1);
glVertex2f(1,1);
glVertex2f(1,0);
glEnd();
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
void gr_palette_clear()
{
gr_palette_faded_out=1;
}
void gr_palette_step_up( int r, int g, int b )
{
if (gr_palette_faded_out) return;
// if ( (r==last_r) && (g==last_g) && (b==last_b) ) return;
/* last_r = r/63.0;
last_g = g/63.0;
last_b = b/63.0;
do_pal_step=(r || g || b);*/
last_r = (r+gr_palette_gamma)/63.0;
last_g = (g+gr_palette_gamma)/63.0;
last_b = (b+gr_palette_gamma)/63.0;
do_pal_step=(r || g || b || gr_palette_gamma);
}
//added on 980913 by adb to fix palette problems
// need a min without side effects...
#undef min
static inline int min(int x, int y) { return x < y ? x : y; }
//end changes by adb
void gr_palette_load( ubyte *pal )
{
int i;//, j;
for (i=0; i<768; i++ ) {
gr_current_pal[i] = pal[i];
if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
}
//palette = screen->format->palette;
gr_palette_faded_out=0;
init_computed_colors();
}
int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
{
gr_palette_faded_out=1;
return 0;
}
int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
{
gr_palette_faded_out=0;
return 0;
}
void gr_palette_read(ubyte * pal)
{
int i;
for (i=0; i<768; i++ ) {
pal[i]=gr_current_pal[i];
if (pal[i] > 63) pal[i] = 63;
}
}
//writes out an uncompressed RGB .tga file
//if we got really spiffy, we could optionally link in libpng or something, and use that.
void write_bmp(char *savename,int w,int h,unsigned char *buf){
int f;
#ifdef __WINDOWS__
f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR);
#else
f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
#endif
if (f>=0){
GLubyte targaMagic[12] = { 0, //no identification field
0,//no colormap
2,//RGB image (well, BGR, actually)
0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
GLubyte blah;
int r;
GLubyte *s;
int x,y;
//write .TGA header.
write (f,targaMagic,sizeof(targaMagic));
blah=w%256;write (f,&blah,1);//w, low
blah=w/256;write (f,&blah,1);//w, high
blah=h%256;write (f,&blah,1);//h, low
blah=h/256;write (f,&blah,1);//h, high
blah=24;write (f,&blah,1);//24 bpp
blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
s=buf;
for (y=0;y<h;y++){//TGAs use BGR ordering of data.
for (x=0;x<w;x++){
blah=s[0];
s[0]=s[2];
s[2]=blah;
s+=3;
}
}
x=0;y=w*h*3;
while (x<y){
r=write(f,buf+x,y);
if (r<=0){
mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
break;
}
x+=r;y-=r;
}
close(f);
}else{
mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
}
}
void save_screen_shot(int automap_flag)
{
// fix t1;
char message[100];
static int savenum=0;
char savename[13];
unsigned char *buf;
if (!ogl_readpixels_ok){
if (!automap_flag)
// hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
return;
}
stop_time();
//added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
if ( savenum == 9999 ) savenum = 0;
sprintf(savename,"scrn%04d.tga",savenum++);
while(!access(savename,0))
{
if ( savenum == 9999 ) savenum = 0;
sprintf(savename,"scrn%04d.tga",savenum++);
}
sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
//end this section addition/change - Victor Rachels
if (automap_flag) {
// save_font = grd_curcanv->cv_font;
// gr_set_curfont(GAME_FONT);
// gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
// gr_get_string_size(message,&w,&h,&aw);
// modex_print_message(32, 2, message);
} else {
// hud_message(MSGC_GAME_FEEDBACK,message);
}
buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
glReadBuffer(GL_FRONT);
glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
d_free(buf);
key_flush();
start_time();
}