vid_shared.c

   1
   2 #include "quakedef.h"
   3
   4 // LordHavoc: these are only set in wgl
   5 qboolean isG200 = false; // LordHavoc: the Matrox G200 can't do per pixel alpha, and it uses a D3D driver for GL... ugh...
   6 qboolean isRagePro = false; // LordHavoc: the ATI Rage Pro has limitations with per pixel alpha (the color scaler does not apply to per pixel alpha images...), although not as bad as a G200.
   7
   8 // LordHavoc: GL_ARB_multitexture support
   9 int gl_mtexable = false;
  10 // LordHavoc: GL_ARB_texture_env_combine support
  11 int gl_combine_extension = false;
  12 // LordHavoc: GL_EXT_compiled_vertex_array support
  13 int gl_supportslockarrays = false;
  14
  15 cvar_t vid_mode = {0, "vid_mode", "0"};
  16 cvar_t vid_mouse = {CVAR_SAVE, "vid_mouse", "1"};
  17 cvar_t vid_fullscreen = {0, "vid_fullscreen", "1"};
  18 cvar_t gl_combine = {0, "gl_combine", "1"};
  19
  20 // GL_ARB_multitexture
  21 void (GLAPIENTRY *qglMultiTexCoord2f) (GLenum, GLfloat, GLfloat);
  22 void (GLAPIENTRY *qglActiveTexture) (GLenum);
  23 void (GLAPIENTRY *qglClientActiveTexture) (GLenum);
  24
  25 // GL_EXT_compiled_vertex_array
  26 void (GLAPIENTRY *qglLockArraysEXT) (GLint first, GLint count);
  27 void (GLAPIENTRY *qglUnlockArraysEXT) (void);
  28
  29 typedef struct
  30 {
  31         char *name;
  32         void **funcvariable;
  33 }
  34 gl_extensionfunctionlist_t;
  35
  36 typedef struct
  37 {
  38         char *name;
  39         gl_extensionfunctionlist_t *funcs;
  40         int *enablevariable;
  41         char *disableparm;
  42 }
  43 gl_extensioninfo_t;
  44
  45 static gl_extensionfunctionlist_t multitexturefuncs[] =
  46 {
  47         {"glMultiTexCoord2fARB", (void **) &qglMultiTexCoord2f},
  48         {"glActiveTextureARB", (void **) &qglActiveTexture},
  49         {"glClientActiveTextureARB", (void **) &qglClientActiveTexture},
  50         {NULL, NULL}
  51 };
  52
  53 static gl_extensionfunctionlist_t compiledvertexarrayfuncs[] =
  54 {
  55         {"glLockArraysEXT", (void **) &qglLockArraysEXT},
  56         {"glUnlockArraysEXT", (void **) &qglUnlockArraysEXT},
  57         {NULL, NULL}
  58 };
  59
  60 static gl_extensioninfo_t gl_extensioninfo[] =
  61 {
  62         {"GL_ARB_multitexture", multitexturefuncs, &gl_mtexable, "-nomtex"},
  63         {"GL_ARB_texture_env_combine", NULL, &gl_combine_extension, "-nocombine"},
  64         {"GL_EXT_compiled_vertex_array", compiledvertexarrayfuncs, &gl_supportslockarrays, "-nocva"},
  65         {NULL, NULL, NULL, NULL}
  66 };
  67
  68 #ifndef WIN32
  69 #include <dlfcn.h>
  70 #endif
  71
  72 void VID_CheckExtensions(void)
  73 {
  74 #ifndef WIN32
  75         void *prjobj;
  76 #endif
  77         gl_extensioninfo_t *info;
  78         gl_extensionfunctionlist_t *func;
  79 //      multitexturefuncs[0].funcvariable = (void **)&qglMultiTexCoord2f;
  80         Con_Printf("Checking OpenGL extensions...\n");
  81 #ifndef WIN32
  82         if ((prjobj = dlopen(NULL, RTLD_LAZY)) == NULL)
  83         {
  84                 Con_Printf("Unable to open symbol list for main program.\n");
  85                 return;
  86         }
  87 #endif
  88         for (info = gl_extensioninfo;info && info->name;info++)
  89         {
  90                 *info->enablevariable = false;
  91                 for (func = info->funcs;func && func->name;func++)
  92                         *func->funcvariable = NULL;
  93                 Con_Printf("checking for %s...  ", info->name);
  94                 if (info->disableparm && COM_CheckParm(info->disableparm))
  95                 {
  96                         Con_Printf("disabled by commandline\n");
  97                         continue;
  98                 }
  99                 if (strstr(gl_extensions, info->name))
 100                 {
 101                         for (func = info->funcs;func && func->name != NULL;func++)
 102                         {
 103 #ifdef WIN32
 104                                 if (!(*func->funcvariable = (void *) wglGetProcAddress(func->name)))
 105 #else
 106                                 if (!(*func->funcvariable = (void *) dlsym(prjobj, func->name)))
 107 #endif
 108                                 {
 109                                         Con_Printf("missing function \"%s\"!\n", func->name);
 110                                         goto missingfunc;
 111                                 }
 112                         }
 113                         Con_Printf("enabled\n");
 114                         *info->enablevariable = true;
 115                         missingfunc:;
 116                 }
 117                 else
 118                         Con_Printf("not detected\n");
 119         }
 120 #ifndef WIN32
 121         dlclose(prjobj);
 122 #endif
 123 }
 124
 125 void Force_CenterView_f (void)
 126 {
 127         cl.viewangles[PITCH] = 0;
 128 }
 129
 130 void VID_InitCvars(void)
 131 {
 132         Cvar_RegisterVariable(&vid_mode);
 133         Cvar_RegisterVariable(&vid_mouse);
 134         Cvar_RegisterVariable(&vid_fullscreen);
 135         Cvar_RegisterVariable(&gl_combine);
 136         Cmd_AddCommand("force_centerview", Force_CenterView_f);
 137 }