merged lp:~hikiko/libgliar/libgliar.new-features to lp:libgliar

[libgliar] / src / gliar.c

diff --git a/src/gliar.c b/src/gliar.c
index 1173a43..5fe944d 100644 (file)
--- a/src/gliar.c
+++ b/src/gliar.c
@@ -23,21 +23,28 @@ Author: Eleni Maria Stea <elene.mst@gmail.com>
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <ctype.h>
 #include <unistd.h>
 #include <dlfcn.h>
 #include <pwd.h>
 #include <GL/gl.h>
 #include "cfg.h"
 
+#ifndef GL_NUM_SHADING_LANGUAGE_VERSIONS
+#define GL_NUM_SHADING_LANGUAGE_VERSIONS       0x82E9
+#endif
+
+static int init_valid_extensions(void);
+
 static int done_init;
 
 static const GLubyte* (*gl_get_string)(GLenum);
-/*static const GLubyte* (*gl_get_stringi)(GLenum, GLuint);
+static const GLubyte* (*gl_get_stringi)(GLenum, GLuint);
+static const void* (*gl_get_integerv)(GLenum, GLint*);
 
-static const void* (*gl_get_booleanv)(GLenum, GLboolean*);
+/*static const void* (*gl_get_booleanv)(GLenum, GLboolean*);
 static const void* (*gl_get_doublev)(GLenum, GLdouble*);
 static const void* (*gl_get_floatv)(GLenum, GLfloat*);
-static const void* (*gl_get_integerv)(GLenum, GLint*);
 static const void* (*gl_get_integer64v)(GLenum, GLint64*);
 
 static const void* (*gl_get_booleani_v)(GLenum, GLuint, GLboolean*);
@@ -48,12 +55,32 @@ static const void* (*gl_get_integer64i_v)(GLenum, GLuint, GLint64*);*/
 
 static struct cfgopt *cfglist;
 
+
 static int init(void)
 {
        if(done_init) {
                return 0;
        }
 
+       gl_get_string = dlsym(RTLD_NEXT, "glGetString");
+       gl_get_stringi = dlsym(RTLD_NEXT, "glGetStringi");
+       gl_get_integerv = dlsym(RTLD_NEXT, "glGetIntegerv");
+
+       /*gl_get_booleanv = dlsym(RTLD_NEXT, "glGetBooleanv");
+       gl_get_doublev = dlsym(RTLD_NEXT, "glGetDoublev");
+       gl_get_floatv = dlsym(RTLD_NEXT, "glGetFloatv");
+       gl_get_integer64v = dlsym(RTLD_NEXT, "glGetInteger64v");
+
+       gl_get_booleani_v = dlsym(RTLD_NEXT, "glGetBooleani_v");
+       gl_get_doublei_v = dlsym(RTLD_NEXT, "glGetDoublei_v");
+       gl_get_floati_v = dlsym(RTLD_NEXT, "glGetFloati_v");
+       gl_get_integeri_v = dlsym(RTLD_NEXT, "glGetIntegeri_v");
+       gl_get_integer64i_v = dlsym(RTLD_NEXT, "glGetInteger64i_v");*/
+
+       if(init_valid_extensions() == -1) {
+               fprintf(stderr, "GLIAR: failed to initialize the valid extension list, might end up with unavailable extensions!\n");
+       }
+
        if(!(cfglist = gliar_load_cfg("gliar.conf"))) {
                struct passwd *pw;
                char *homedir, *path;
@@ -72,22 +99,58 @@ static int init(void)
                }
        }
 
-       gl_get_string = dlsym(RTLD_NEXT, "glGetString");
-/*     gl_get_stringi = dlsym(RTLD_NEXT, "glGetStringi");
+       done_init = 1;
+       return 0;
+}
 
-       gl_get_booleanv = dlsym(RTLD_NEXT, "glGetBooleanv");
-       gl_get_doublev = dlsym(RTLD_NEXT, "glGetDoublev");
-       gl_get_floatv = dlsym(RTLD_NEXT, "glGetFloatv");
-       gl_get_integerv = dlsym(RTLD_NEXT, "glGetIntegerv");
-       gl_get_integer64v = dlsym(RTLD_NEXT, "glGetInteger64v");
+static int init_valid_extensions(void)
+{
+       int i, num_ext, prev_space = 0;
+       const char *gl_ext_str;
+       char *ext_str, *tok, *ptr, **ext_table;
 
-       gl_get_booleani_v = dlsym(RTLD_NEXT, "glGetBooleani_v");
-       gl_get_doublei_v = dlsym(RTLD_NEXT, "glGetDoublei_v");
-       gl_get_floati_v = dlsym(RTLD_NEXT, "glGetFloati_v");
-       gl_get_integeri_v = dlsym(RTLD_NEXT, "glGetIntegeri_v");
-       gl_get_integer64i_v = dlsym(RTLD_NEXT, "glGetInteger64i_v");*/
+       /* initialize the list of valid extensions */
+       if(!(gl_ext_str = (const char*)gl_get_string(GL_EXTENSIONS))) {
+               return -1;
+       }
 
-       done_init = 1;
+       if(!(ext_str = malloc(strlen(gl_ext_str) + 1))) {
+               return -1;
+       }
+       strcpy(ext_str, gl_ext_str);
+
+       /* count the extensions */
+       num_ext = 0;
+       ptr = ext_str;
+       while(*ptr) {
+               if(isspace(*ptr) && prev_space == 0) {
+                       prev_space = 1;
+                       num_ext++;
+               } else {
+                       prev_space = 0;
+               }
+               ptr++;
+       }
+
+       /* allocate extension table */
+       if(!(ext_table = malloc(num_ext * sizeof *ext_table))) {
+               free(ext_str);
+               return -1;
+       }
+
+       /* setup the ext_table slots to point to the start of each substring (extension) */
+       for(i=0; i<num_ext; i++) {
+               if(!(tok = strtok(i == 0 ? ext_str : 0, " \t\v\n\r"))) {
+                       fprintf(stderr, "DEBUG: strtok returned 0 at token %d\n", i);
+                       num_ext = i;
+               }
+               ext_table[i] = tok;
+       }
+
+       gliar_value_set("extensions", ext_table, num_ext);
+
+       free(ext_table);
+       free(ext_str);
        return 0;
 }
 
@@ -129,3 +192,71 @@ const GLubyte *glGetString(GLenum name)
 
        return gl_get_string(name);
 }
+
+const GLubyte *glGetStringi(GLenum name, GLuint index)
+{
+       char *key;
+       const struct cfgopt *option;
+
+       init();
+
+       switch(name) {
+       case GL_EXTENSIONS:
+               key = "extensions";
+               break;
+
+       case GL_SHADING_LANGUAGE_VERSION:
+               key = "sl version";
+               break;
+
+       default:
+               key = 0;
+       }
+
+       if(key && (option = gliar_find_opt(cfglist, key))) {
+               return (const GLubyte*)option->str_val[index];
+       }
+
+       return gl_get_stringi(name, index);
+}
+
+void glGetIntegerv(GLenum name, GLint *val)
+{
+       char *key;
+       const struct cfgopt *option;
+
+       init();
+
+       switch(name) {
+       case GL_NUM_EXTENSIONS:
+               if(1) {
+                       key = "extensions";
+               } else {
+       case GL_NUM_SHADING_LANGUAGE_VERSIONS:
+                       key = "sl version";
+               }
+               if(key && (option = gliar_find_opt(cfglist, key))) {
+                       *val = option->str_count;
+                       return;
+               }
+               break;
+
+       case GL_MAX_TEXTURE_UNITS:
+               key = "max texture units";
+               break;
+
+       case GL_MAX_TEXTURE_SIZE:
+               key = "max texture size";
+               break;
+
+       default:
+               key = 0;
+       }
+
+       if(key && (option = gliar_find_opt(cfglist, key)) && option->type == GLIAR_NUMBER) {
+               *val = option->num_val;
+               return;
+       }
+
+       gl_get_integerv(name, val);
+}