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- Added a new cvar, "gl_stencilshadow". Off by default, set
it to 1 to enable stencilbuffer shadows. (Turn gl_shadows on first!) Based on MrG's tutorial on quakesrc.org, but hacked a bit to work for GLX instead of Win32, and is a bit more robust (won't die if it can't get a stencil buffer). - Updated TODO list to reflect this change.
This commit is contained in:
Jamie Wilkinson
parent
d4e602d215
commit
a29be70dcd
6 changed files with 121 additions and 46 deletions
5
TODO
5
TODO
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@ -20,6 +20,7 @@ http://gozer.quakeforge.net/list-archives/quakeforge-cvs/2002-April/000151.html
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- investigate the possibility of savegames not being tied to a particular build
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- fix software assembler when building without --disable-asm on i386
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- split out assembler per arch/os (we currently have gas i386 and win i386)
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- make sure that we give back the mouse and keyboard if the game crashes
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from http://www.quakesrc.org/?Page=tutorials&Dir=Quake2 :
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(replace - with X when done)
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@ -32,7 +33,7 @@ from http://www.quakesrc.org/?Page=tutorials&Dir=Quake2 :
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- Transparent console
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- How to add .m32 texture support to the Quake2 engine and compile tools.
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- TGA textures
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- Stencil buffered shadows
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X Stencil buffered shadows
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- Adding true color TGA loading for MD2 Models
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- Better dynamic light falloff
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- Controlable water waves
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@ -41,5 +42,3 @@ from http://www.quakesrc.org/?Page=tutorials&Dir=Quake2 :
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- Adding a skybox size variable
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- Adding new video resolutions
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- Drawing alias model bounding boxes
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@ -88,6 +88,7 @@ set gl_texturemode "GL_LINEAR_MIPMAP_NEAREST"
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set gl_driver "opengl32"
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set gl_finish "0"
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set gl_shadows "0"
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set gl_stencilshadow "0"
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set gl_mode "3"
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set gl_modulate "1"
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set gl_particle_att_c "0.01"
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54
src/gl_glx.c
54
src/gl_glx.c
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@ -111,6 +111,8 @@ static XF86VidModeModeInfo **vidmodes;
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//static int default_dotclock_vidmode;
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static int num_vidmodes;
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static qboolean vidmode_active = false;
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/* hardware gamma */
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static XF86VidModeGamma oldgamma;
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static qboolean mlooking;
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@ -119,6 +121,9 @@ static qboolean mouse_active = false;
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static qboolean dgamouse = false;
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static qboolean vidmode_ext = false;
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/* stencilbuffer shadows */
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qboolean have_stencil = false;
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// state struct passed in Init
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static in_state_t *in_state;
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@ -684,10 +689,20 @@ int GLimp_SetMode( unsigned int *pwidth, unsigned int *pheight, int mode, qboole
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unsigned int width, height;
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int attrib[] = {
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GLX_RGBA,
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GLX_DOUBLEBUFFER,
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GLX_RED_SIZE, 1,
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GLX_GREEN_SIZE, 1,
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GLX_BLUE_SIZE, 1,
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GLX_DEPTH_SIZE, 1,
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GLX_STENCIL_SIZE, 1,
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None
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};
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int attrib_nostencil[] = {
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GLX_RGBA,
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GLX_DOUBLEBUFFER,
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GLX_RED_SIZE, 1,
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GLX_GREEN_SIZE, 1,
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GLX_BLUE_SIZE, 1,
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GLX_DEPTH_SIZE, 1,
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None
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};
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@ -749,12 +764,47 @@ int GLimp_SetMode( unsigned int *pwidth, unsigned int *pheight, int mode, qboole
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visinfo = qglXChooseVisual(dpy, scrnum, attrib);
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if (!visinfo) {
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fprintf(stderr, "Error couldn't get an RGB, Double-buffered, Depth visual\n");
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return rserr_invalid_mode;
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fprintf(stderr, "W: couldn't get an RGBA, DOUBLEBUFFER, DEPTH, STENCIL visual\n");
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visinfo = qglXChooseVisual(dpy, scrnum, attrib_nostencil);
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if (!visinfo) {
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fprintf(stderr, "E: couldn't get an RGBA, DOUBLEBUFFER, DEPTH visual\n");
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return rserr_invalid_mode;
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}
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}
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gl_state.hwgamma = false;
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#if 0
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/* do some pantsness */
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{
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int red_bits, blue_bits, green_bits, depth_bits, alpha_bits;
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glXGetConfig(dpy, visinfo, GLX_RED_SIZE, &red_bits);
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glXGetConfig(dpy, visinfo, GLX_BLUE_SIZE, &blue_bits);
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glXGetConfig(dpy, visinfo, GLX_GREEN_SIZE, &green_bits);
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glXGetConfig(dpy, visinfo, GLX_DEPTH_SIZE, &depth_bits);
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glXGetConfig(dpy, visinfo, GLX_ALPHA_SIZE, &alpha_bits);
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ri.Con_Printf(PRINT_ALL, "I: got %d bits of red\n", red_bits);
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ri.Con_Printf(PRINT_ALL, "I: got %d bits of blue\n", blue_bits);
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ri.Con_Printf(PRINT_ALL, "I: got %d bits of green\n", green_bits);
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ri.Con_Printf(PRINT_ALL, "I: got %d bits of depth\n", depth_bits);
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ri.Con_Printf(PRINT_ALL, "I: got %d bits of alpha\n", alpha_bits);
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}
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#endif
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/* stencilbuffer shadows */
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{
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int stencil_bits;
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if (!glXGetConfig(dpy, visinfo, GLX_STENCIL_SIZE, &stencil_bits)) {
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ri.Con_Printf(PRINT_ALL, "I: got %d bits of stencil\n", stencil_bits);
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if (stencil_bits >= 1) {
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have_stencil = true;
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}
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}
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}
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if (vidmode_ext) {
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int best_fit, best_dist, dist, x, y;
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@ -214,6 +214,7 @@ extern cvar_t *gl_mode;
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extern cvar_t *gl_log;
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extern cvar_t *gl_lightmap;
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extern cvar_t *gl_shadows;
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extern cvar_t * gl_stencilshadow;
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extern cvar_t *gl_dynamic;
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extern cvar_t *gl_monolightmap;
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extern cvar_t *gl_nobind;
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@ -1,23 +1,25 @@
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/*
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Copyright (C) 1997-2001 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// gl_mesh.c: triangle model functions
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/* $Id$
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*
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* triangle model functions
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*
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* Copyright (C) 1997-2001 Id Software, Inc.
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* Copyright (c) 2002 The Quakeforge Project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "gl_local.h"
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@ -302,6 +304,8 @@ GL_DrawAliasShadow
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=============
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*/
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extern vec3_t lightspot;
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/* stencilbuffer shadows */
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extern qboolean have_stencil;
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void GL_DrawAliasShadow (dmdl_t *paliashdr, int posenum)
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{
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@ -324,6 +328,13 @@ void GL_DrawAliasShadow (dmdl_t *paliashdr, int posenum)
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height = -lheight + 1.0;
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/* stencilbuffer shadows */
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if (have_stencil && gl_stencilshadow->value) {
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qglEnable(GL_STENCIL_TEST);
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qglStencilFunc(GL_EQUAL, 1, 2);
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qglStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
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}
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while (1)
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{
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// get the vertex count and primitive type
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@ -362,7 +373,11 @@ void GL_DrawAliasShadow (dmdl_t *paliashdr, int posenum)
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} while (--count);
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qglEnd ();
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}
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}
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/* stencilbuffer shadows */
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if (have_stencil && gl_stencilshadow->value)
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qglDisable(GL_STENCIL_TEST);
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}
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#endif
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@ -1,23 +1,23 @@
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/*
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Copyright (C) 1997-2001 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// r_main.c
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/* $Id$
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*
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* Copyright (C) 1997-2001 Id Software, Inc.
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* Copyright (c) 2002 The Quakeforge Project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <ctype.h>
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@ -111,6 +111,7 @@ cvar_t *gl_drawbuffer;
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cvar_t *gl_driver;
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cvar_t *gl_lightmap;
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cvar_t *gl_shadows;
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cvar_t * gl_stencilshadow;
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cvar_t *gl_mode;
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cvar_t *gl_dynamic;
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cvar_t *gl_monolightmap;
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@ -770,6 +771,8 @@ void R_SetupGL (void)
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R_Clear
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=============
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*/
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extern qboolean have_stencil;
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void R_Clear (void)
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{
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if (gl_ztrick->value)
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@ -806,6 +809,11 @@ void R_Clear (void)
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qglDepthRange (gldepthmin, gldepthmax);
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/* stencilbuffer shadows */
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if (gl_shadows->value && have_stencil && gl_stencilshadow->value) {
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qglClearStencil(1);
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qglClear(GL_STENCIL_BUFFER_BIT);
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}
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}
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void R_Flash( void )
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@ -1010,6 +1018,7 @@ void R_Register( void )
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gl_mode = ri.Cvar_Get( "gl_mode", "3", CVAR_ARCHIVE );
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gl_lightmap = ri.Cvar_Get ("gl_lightmap", "0", 0);
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gl_shadows = ri.Cvar_Get ("gl_shadows", "0", CVAR_ARCHIVE );
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gl_stencilshadow = ri.Cvar_Get("gl_stencilshadow", "0", CVAR_ARCHIVE);
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gl_dynamic = ri.Cvar_Get ("gl_dynamic", "1", 0);
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gl_nobind = ri.Cvar_Get ("gl_nobind", "0", 0);
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gl_round_down = ri.Cvar_Get ("gl_round_down", "1", 0);
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