diff options
Diffstat (limited to 'indra/llwindow/GL/glh_extensions.h')
| -rw-r--r-- | indra/llwindow/GL/glh_extensions.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/indra/llwindow/GL/glh_extensions.h b/indra/llwindow/GL/glh_extensions.h new file mode 100644 index 0000000000..b936b5d307 --- /dev/null +++ b/indra/llwindow/GL/glh_extensions.h @@ -0,0 +1,207 @@ +/* + * glh_extensions.h + * From nVidia Corporation, downloaded 2006-12-18 from: + * http://developer.nvidia.com/attach/8196 + * ("NVParse Library with Source (.zip) (2390 KB)") + * + * License (quoted from license_info.txt in aforementioned file): + * "The files bison.exe, bison.simple, and flex.exe are covered by + * the GPL. All other files in this distribution can be used however + * you want." + */ + +#ifndef GLH_EXTENSIONS +#define GLH_EXTENSIONS + +#include <string.h> +#include <stdio.h> + +#ifdef _WIN32 +# include <windows.h> +#endif + +#ifndef __APPLE__ +#include <GL/gl.h> +#endif + +#ifdef _WIN32 +# include "GL/wglext.h" +#endif + +#define CHECK_MEMORY(ptr) \ + if (NULL == ptr) { \ + printf("Error allocating memory in file %s, line %d\n", __FILE__, __LINE__); \ + exit(-1); \ + } + +#ifdef GLH_EXT_SINGLE_FILE +# define GLH_EXTENSIONS_SINGLE_FILE // have to do this because glh_genext.h unsets GLH_EXT_SINGLE_FILE +#endif + +#include "glh_genext.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef GLH_EXTENSIONS_SINGLE_FILE + +class GLHExts +{ +public: + GLHExts() + { + mSysExts = NULL; +// mUnsupportedExts = NULL; + } + ~GLHExts() + { + if (mSysExts) + { + free(mSysExts); + } +// if (mUnsupportedExts) +// { +// free(mUnsupportedExts); +// } + } + char *mSysExts; +// char *mUnsupportedExts; +}; + +GLHExts gGLHExts; + +static int ExtensionExists(const char* extName, const char* sysExts) +{ + char *padExtName = (char*)malloc(strlen(extName) + 2); + strcat(strcpy(padExtName, extName), " "); + + if (0 == strcmp(extName, "GL_VERSION_1_2")) { + const char *version = (const char*)glGetString(GL_VERSION); + if (strstr(version, "1.0") == version || strstr(version, "1.1") == version) { + return FALSE; + } else { + return TRUE; + } + } + if (strstr(sysExts, padExtName)) { + free(padExtName); + return TRUE; + } else { + free(padExtName); + return FALSE; + } +} + +static const char* EatWhiteSpace(const char *str) +{ + for (; *str && (' ' == *str || '\t' == *str || '\n' == *str); str++); + return str; +} + +static const char* EatNonWhiteSpace(const char *str) +{ + for (; *str && (' ' != *str && '\t' != *str && '\n' != *str); str++); + return str; +} + + +int glh_init_extensions(const char *origReqExts) +{ + // Length of requested extensions string + unsigned reqExtsLen; + char *reqExts; + // Ptr for individual extensions within reqExts + char *reqExt; + int success = TRUE; + + // build space-padded extension string + if (NULL == gGLHExts.mSysExts) { + const char *extensions = (const char*)glGetString(GL_EXTENSIONS); + int sysExtsLen = (int)strlen(extensions); + const char *winsys_extensions = 0; + int winsysExtsLen = 0; +#ifdef _WIN32 + { + PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = 0; + wglGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB"); + if(wglGetExtensionsStringARB) + { + winsys_extensions = wglGetExtensionsStringARB(wglGetCurrentDC()); + winsysExtsLen = (S32)strlen(winsys_extensions); + } + } +#endif + // Add 2 bytes, one for padding space, one for terminating NULL + gGLHExts.mSysExts = (char*)malloc(sysExtsLen + winsysExtsLen + 3); + CHECK_MEMORY(gGLHExts.mSysExts); + strcpy(gGLHExts.mSysExts, extensions); + gGLHExts.mSysExts[sysExtsLen] = ' '; + gGLHExts.mSysExts[sysExtsLen + 1] = 0; + if (winsysExtsLen) + { + strcat(gGLHExts.mSysExts, winsys_extensions); + } + gGLHExts.mSysExts[sysExtsLen + 1 + winsysExtsLen] = ' '; + gGLHExts.mSysExts[sysExtsLen + 1 + winsysExtsLen + 1] = 0; + } + + if (NULL == origReqExts) + { + return TRUE; + } + reqExts = strdup(origReqExts); + reqExtsLen = (S32)strlen(reqExts); + /* + if (NULL == gGLHExts.mUnsupportedExts) + { + gGLHExts.mUnsupportedExts = (char*)malloc(reqExtsLen + 1); + } + else if (reqExtsLen > strlen(gGLHExts.mUnsupportedExts)) + { + gGLHExts.mUnsupportedExts = (char*)realloc(gGLHExts.mUnsupportedExts, reqExtsLen + 1); + } + CHECK_MEMORY(gGLHExts.mUnsupportedExts); + *gGLHExts.mUnsupportedExts = 0; + */ + + // Parse requested extension list + for (reqExt = reqExts; + (reqExt = (char*)EatWhiteSpace(reqExt)) && *reqExt; + reqExt = (char*)EatNonWhiteSpace(reqExt)) + { + char *extEnd = (char*)EatNonWhiteSpace(reqExt); + char saveChar = *extEnd; + *extEnd = (char)0; + + if (!ExtensionExists(reqExt, gGLHExts.mSysExts) || + !glh_init_extension(reqExt)) { + /* + // add reqExt to end of unsupportedExts + strcat(gGLHExts.mUnsupportedExts, reqExt); + strcat(gGLHExts.mUnsupportedExts, " "); + */ + success = FALSE; + } + *extEnd = saveChar; + } + free(reqExts); + return success; +} + +const char* glh_get_unsupported_extensions() +{ + return ""; +// return (const char*)gGLHExts.mUnsupportedExts; +} + +#else +int glh_init_extensions(const char *origReqExts); +const char* glh_get_unsupported_extensions(); +#endif /* GLH_EXT_SINGLE_FILE */ + +#ifdef __cplusplus +} +#endif + +#endif /* GLH_EXTENSIONS */ |