Merge commit 'eee/mesa-es' into android

1 files changed, 1173 insertions, 0 deletions

diff --git a/src/glew/visualinfo.c b/src/glew/visualinfo.c
new file mode 100644
index 0000000000..384313df22
--- /dev/null
+++ b/src/glew/visualinfo.c
@@ -0,0 +1,1173 @@
+/*
+** visualinfo.c
+**
+** Copyright (C) Nate Robins, 1997
+**               Michael Wimmer, 1999
+**               Milan Ikits, 2002-2008
+**
+** visualinfo is a small utility that displays all available visuals,
+** aka. pixelformats, in an OpenGL system along with renderer version
+** information. It shows a table of all the visuals that support OpenGL
+** along with their capabilities. The format of the table is similar to
+** that of glxinfo on Unix systems:
+**
+** visual ~= pixel format descriptor
+** id       = visual id (integer from 1 - max visuals)
+** tp       = type (wn: window, pb: pbuffer, wp: window & pbuffer, bm: bitmap)
+** ac	    = acceleration (ge: generic, fu: full, no: none)
+** fm	    = format (i: integer, f: float, c: color index)
+** db	    = double buffer (y = yes)
+** sw       = swap method (x: exchange, c: copy, u: undefined)
+** st	    = stereo (y = yes)
+** sz       = total # bits
+** r        = # bits of red
+** g        = # bits of green
+** b        = # bits of blue
+** a        = # bits of alpha
+** axbf     = # aux buffers
+** dpth     = # bits of depth
+** stcl     = # bits of stencil
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <GL/glew.h>
+#if defined(_WIN32)
+#include <GL/wglew.h>
+#elif defined(__APPLE__) && !defined(GLEW_APPLE_GLX)
+#include <AGL/agl.h>
+#else
+#include <GL/glxew.h>
+#endif
+
+#ifdef GLEW_MX
+GLEWContext _glewctx;
+#  define glewGetContext() (&_glewctx)
+#  ifdef _WIN32
+WGLEWContext _wglewctx;
+#    define wglewGetContext() (&_wglewctx)
+#  elif !defined(__APPLE__) || defined(GLEW_APPLE_GLX)
+GLXEWContext _glxewctx;
+#    define glxewGetContext() (&_glxewctx)
+#  endif
+#endif /* GLEW_MX */
+
+typedef struct GLContextStruct
+{
+#ifdef _WIN32
+  HWND wnd;
+  HDC dc;
+  HGLRC rc;
+#elif defined(__APPLE__) && !defined(GLEW_APPLE_GLX)
+  AGLContext ctx, octx;
+#else
+  Display* dpy;
+  XVisualInfo* vi;
+  GLXContext ctx;
+  Window wnd;
+  Colormap cmap;
+#endif
+} GLContext;
+
+void InitContext (GLContext* ctx);
+GLboolean CreateContext (GLContext* ctx);
+void DestroyContext (GLContext* ctx);
+void VisualInfo (GLContext* ctx);
+void PrintExtensions (const char* s);
+GLboolean ParseArgs (int argc, char** argv);
+
+int showall = 0;
+int displaystdout = 0;
+int verbose = 0;
+int drawableonly = 0;
+
+char* display = NULL;
+int visual = -1;
+
+FILE* file = 0;
+GLContext ctx;
+
+int 
+main (int argc, char** argv)
+{
+  GLenum err;
+
+  /* ---------------------------------------------------------------------- */
+  /* parse arguments */
+  if (GL_TRUE == ParseArgs(argc-1, argv+1))
+  {
+#if defined(_WIN32)
+    fprintf(stderr, "Usage: visualinfo [-a] [-s] [-h] [-pf <id>]\n");
+    fprintf(stderr, "        -a: show all visuals\n");
+    fprintf(stderr, "        -s: display to stdout instead of visualinfo.txt\n");
+    fprintf(stderr, "        -pf <id>: use given pixelformat\n");
+    fprintf(stderr, "        -h: this screen\n");
+#else
+    fprintf(stderr, "Usage: visualinfo [-h] [-display <display>] [-visual <id>]\n");
+    fprintf(stderr, "        -h: this screen\n");
+    fprintf(stderr, "        -display <display>: use given display\n");
+    fprintf(stderr, "        -visual <id>: use given visual\n");
+#endif
+    return 1;
+  }
+
+  /* ---------------------------------------------------------------------- */
+  /* create OpenGL rendering context */
+  InitContext(&ctx);
+  if (GL_TRUE == CreateContext(&ctx))
+  {
+    fprintf(stderr, "Error: CreateContext failed\n");
+    DestroyContext(&ctx);
+    return 1;
+  }
+
+  /* ---------------------------------------------------------------------- */
+  /* initialize GLEW */
+  glewExperimental = GL_TRUE;
+#ifdef GLEW_MX
+  err = glewContextInit(glewGetContext());
+#  ifdef _WIN32
+  err = err || wglewContextInit(wglewGetContext());
+#  elif !defined(__APPLE__) || defined(GLEW_APPLE_GLX)
+  err = err || glxewContextInit(glxewGetContext());
+#  endif
+#else
+  err = glewInit();
+#endif
+  if (GLEW_OK != err)
+  {
+    fprintf(stderr, "Error [main]: glewInit failed: %s\n", glewGetErrorString(err));
+    DestroyContext(&ctx);
+    return 1;
+  }
+
+  /* ---------------------------------------------------------------------- */
+  /* open file */
+#if defined(_WIN32)
+  if (!displaystdout) 
+    file = fopen("visualinfo.txt", "w");
+  if (file == NULL)
+    file = stdout;
+#else
+  file = stdout;
+#endif
+
+  /* ---------------------------------------------------------------------- */
+  /* output header information */
+  /* OpenGL extensions */
+  fprintf(file, "OpenGL vendor string: %s\n", glGetString(GL_VENDOR));
+  fprintf(file, "OpenGL renderer string: %s\n", glGetString(GL_RENDERER));
+  fprintf(file, "OpenGL version string: %s\n", glGetString(GL_VERSION));
+  fprintf(file, "OpenGL extensions (GL_): \n");
+  PrintExtensions((char*)glGetString(GL_EXTENSIONS));
+  /* GLU extensions */
+  fprintf(file, "GLU version string: %s\n", gluGetString(GLU_VERSION));
+  fprintf(file, "GLU extensions (GLU_): \n");
+  PrintExtensions((char*)gluGetString(GLU_EXTENSIONS));
+
+  /* ---------------------------------------------------------------------- */
+  /* extensions string */
+#if defined(_WIN32)
+  /* WGL extensions */
+  if (WGLEW_ARB_extensions_string || WGLEW_EXT_extensions_string)
+  {
+    fprintf(file, "WGL extensions (WGL_): \n");
+    PrintExtensions(wglGetExtensionsStringARB ? 
+                    (char*)wglGetExtensionsStringARB(ctx.dc) :
+		    (char*)wglGetExtensionsStringEXT());
+  }
+#elif defined(__APPLE__) && !defined(GLEW_APPLE_GLX)
+  
+#else
+  /* GLX extensions */
+  fprintf(file, "GLX extensions (GLX_): \n");
+  PrintExtensions(glXQueryExtensionsString(glXGetCurrentDisplay(), 
+                                           DefaultScreen(glXGetCurrentDisplay())));
+#endif
+
+  /* ---------------------------------------------------------------------- */
+  /* enumerate all the formats */
+  VisualInfo(&ctx);
+
+  /* ---------------------------------------------------------------------- */
+  /* release resources */
+  DestroyContext(&ctx);
+  if (file != stdout)
+    fclose(file);
+  return 0;
+}
+
+/* do the magic to separate all extensions with comma's, except
+   for the last one that _may_ terminate in a space. */
+void PrintExtensions (const char* s)
+{
+  char t[80];
+  int i=0;
+  char* p=0;
+
+  t[79] = '\0';
+  while (*s)
+  {
+    t[i++] = *s;
+    if(*s == ' ')
+    {
+      if (*(s+1) != '\0') {
+	t[i-1] = ',';
+	t[i] = ' ';
+	p = &t[i++];
+      }
+      else /* zoinks! last one terminated in a space! */
+      {
+	t[i-1] = '\0';
+      }
+    }
+    if(i > 80 - 5)
+    {
+      *p = t[i] = '\0';
+      fprintf(file, "    %s\n", t);
+      p++;
+      i = (int)strlen(p);
+      strcpy(t, p);
+    }
+    s++;
+  }
+  t[i] = '\0';
+  fprintf(file, "    %s.\n", t);
+}
+
+/* ---------------------------------------------------------------------- */
+
+#if defined(_WIN32)
+
+void
+VisualInfoARB (GLContext* ctx)
+{
+  int attrib[32], value[32], n_attrib, n_pbuffer=0, n_float=0;
+  int i, pf, maxpf;
+  unsigned int c;
+
+  /* to get pbuffer capable pixel formats */
+  attrib[0] = WGL_DRAW_TO_PBUFFER_ARB;
+  attrib[1] = GL_TRUE;
+  attrib[2] = 0;
+  wglChoosePixelFormatARB(ctx->dc, attrib, 0, 1, &pf, &c);
+  /* query number of pixel formats */
+  attrib[0] = WGL_NUMBER_PIXEL_FORMATS_ARB;
+  wglGetPixelFormatAttribivARB(ctx->dc, 0, 0, 1, attrib, value);
+  maxpf = value[0];
+  for (i=0; i<32; i++)
+    value[i] = 0;
+
+  attrib[0] = WGL_SUPPORT_OPENGL_ARB;
+  attrib[1] = WGL_DRAW_TO_WINDOW_ARB;
+  attrib[2] = WGL_DRAW_TO_BITMAP_ARB;
+  attrib[3] = WGL_ACCELERATION_ARB;
+  /* WGL_NO_ACCELERATION_ARB, WGL_GENERIC_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB */
+  attrib[4] = WGL_SWAP_METHOD_ARB;
+  /* WGL_SWAP_EXCHANGE_ARB, WGL_SWAP_COPY_ARB, WGL_SWAP_UNDEFINED_ARB */
+  attrib[5] = WGL_DOUBLE_BUFFER_ARB;
+  attrib[6] = WGL_STEREO_ARB;
+  attrib[7] = WGL_PIXEL_TYPE_ARB;
+  /* WGL_TYPE_RGBA_ARB, WGL_TYPE_COLORINDEX_ARB,
+     WGL_TYPE_RGBA_FLOAT_ATI (WGL_ATI_pixel_format_float) */
+  /* Color buffer information */
+  attrib[8] = WGL_COLOR_BITS_ARB;
+  attrib[9] = WGL_RED_BITS_ARB;
+  attrib[10] = WGL_GREEN_BITS_ARB;
+  attrib[11] = WGL_BLUE_BITS_ARB;
+  attrib[12] = WGL_ALPHA_BITS_ARB;
+  /* Accumulation buffer information */
+  attrib[13] = WGL_ACCUM_BITS_ARB;
+  attrib[14] = WGL_ACCUM_RED_BITS_ARB;
+  attrib[15] = WGL_ACCUM_GREEN_BITS_ARB;
+  attrib[16] = WGL_ACCUM_BLUE_BITS_ARB;
+  attrib[17] = WGL_ACCUM_ALPHA_BITS_ARB;
+  /* Depth, stencil, and aux buffer information */
+  attrib[18] = WGL_DEPTH_BITS_ARB;
+  attrib[19] = WGL_STENCIL_BITS_ARB;
+  attrib[20] = WGL_AUX_BUFFERS_ARB;
+  /* Layer information */
+  attrib[21] = WGL_NUMBER_OVERLAYS_ARB;
+  attrib[22] = WGL_NUMBER_UNDERLAYS_ARB;
+  attrib[23] = WGL_SWAP_LAYER_BUFFERS_ARB;
+  attrib[24] = WGL_SAMPLES_ARB;
+  attrib[25] = WGL_SUPPORT_GDI_ARB;
+  n_attrib = 26;
+  if (WGLEW_ARB_pbuffer)
+  {
+    attrib[n_attrib] = WGL_DRAW_TO_PBUFFER_ARB;
+    n_pbuffer = n_attrib;
+    n_attrib++;
+  }
+  if (WGLEW_NV_float_buffer)
+  {
+    attrib[n_attrib] = WGL_FLOAT_COMPONENTS_NV;
+    n_float = n_attrib;
+    n_attrib++;
+  }
+  
+  if (!verbose)
+  {
+    /* print table header */
+    fprintf(file, " +-----+-------------------------+-----------------+----------+-----------------+----------+\n");
+    fprintf(file, " |     |          visual         |      color      | ax dp st |      accum      |   layer  |\n");
+    fprintf(file, " |  id | tp ac gd fm db sw st ms |  sz  r  g  b  a | bf th cl |  sz  r  g  b  a | ov un sw |\n");
+    fprintf(file, " +-----+-------------------------+-----------------+----------+-----------------+----------+\n");
+    /* loop through all the pixel formats */
+    for(i = 1; i <= maxpf; i++)
+    {
+      wglGetPixelFormatAttribivARB(ctx->dc, i, 0, n_attrib, attrib, value);
+      /* only describe this format if it supports OpenGL */
+      if (!value[0]) continue;
+      /* by default show only fully accelerated window or pbuffer capable visuals */
+      if (!showall
+	  && ((value[2] && !value[1])
+	  || (!WGLEW_ARB_pbuffer || !value[n_pbuffer])
+	  || (value[3] != WGL_FULL_ACCELERATION_ARB))) continue;
+      /* print out the information for this visual */
+      /* visual id */
+      fprintf(file, " |% 4d | ", i);
+      /* visual type */
+      if (value[1])
+      {
+	if (WGLEW_ARB_pbuffer && value[n_pbuffer]) fprintf(file, "wp ");
+	else fprintf(file, "wn ");
+      }
+      else
+      {
+	if (value[2]) fprintf(file, "bm ");
+	else if (WGLEW_ARB_pbuffer && value[n_pbuffer]) fprintf(file, "pb ");
+      }
+      /* acceleration */
+      fprintf(file, "%s ", value[3] == WGL_FULL_ACCELERATION_ARB ? "fu" : 
+	      value[3] == WGL_GENERIC_ACCELERATION_ARB ? "ge" :
+	      value[3] == WGL_NO_ACCELERATION_ARB ? "no" : ". ");
+      /* gdi support */
+      fprintf(file, " %c ", value[25] ? 'y' : '.');
+      /* format */
+      if (WGLEW_NV_float_buffer && value[n_float]) fprintf(file, " f ");
+      else if (WGLEW_ATI_pixel_format_float && value[7] == WGL_TYPE_RGBA_FLOAT_ATI) fprintf(file, " f ");
+      else if (value[7] == WGL_TYPE_RGBA_ARB) fprintf(file, " i ");
+      else if (value[7] == WGL_TYPE_COLORINDEX_ARB) fprintf(file, " c ");
+      /* double buffer */
+      fprintf(file, " %c ", value[5] ? 'y' : '.');
+      /* swap method */
+      if (value[4] == WGL_SWAP_EXCHANGE_ARB) fprintf(file, " x ");
+      else if (value[4] == WGL_SWAP_COPY_ARB) fprintf(file, " c ");
+      else if (value[4] == WGL_SWAP_UNDEFINED_ARB) fprintf(file, " . ");
+      else fprintf(file, " . ");
+      /* stereo */
+      fprintf(file, " %c ", value[6] ? 'y' : '.');
+      /* multisample */
+      if (value[24] > 0)
+	fprintf(file, "%2d | ", value[24]);
+      else
+	fprintf(file, " . | ");
+      /* color size */
+      if (value[8]) fprintf(file, "%3d ", value[8]);
+      else fprintf(file, "  . ");
+      /* red */
+      if (value[9]) fprintf(file, "%2d ", value[9]); 
+      else fprintf(file, " . ");
+      /* green */
+      if (value[10]) fprintf(file, "%2d ", value[10]); 
+      else fprintf(file, " . ");
+      /* blue */
+      if (value[11]) fprintf(file, "%2d ", value[11]);
+      else fprintf(file, " . ");
+      /* alpha */
+      if (value[12]) fprintf(file, "%2d | ", value[12]); 
+      else fprintf(file, " . | ");
+      /* aux buffers */
+      if (value[20]) fprintf(file, "%2d ", value[20]);
+      else fprintf(file, " . ");
+      /* depth */
+      if (value[18]) fprintf(file, "%2d ", value[18]);
+      else fprintf(file, " . ");
+      /* stencil */
+      if (value[19]) fprintf(file, "%2d | ", value[19]);
+      else fprintf(file, " . | ");
+      /* accum size */
+      if (value[13]) fprintf(file, "%3d ", value[13]);
+      else fprintf(file, "  . ");
+      /* accum red */
+      if (value[14]) fprintf(file, "%2d ", value[14]);
+      else fprintf(file, " . ");
+      /* accum green */
+      if (value[15]) fprintf(file, "%2d ", value[15]);
+      else fprintf(file, " . ");
+      /* accum blue */
+      if (value[16]) fprintf(file, "%2d ", value[16]);
+      else fprintf(file, " . ");
+      /* accum alpha */
+      if (value[17]) fprintf(file, "%2d | ", value[17]);
+      else fprintf(file, " . | ");
+      /* overlay */
+      if (value[21]) fprintf(file, "%2d ", value[21]);
+      else fprintf(file, " . ");
+      /* underlay */
+      if (value[22]) fprintf(file, "%2d ", value[22]);
+      else fprintf(file, " . ");
+      /* layer swap */
+      if (value[23]) fprintf(file, "y ");
+      else fprintf(file, " . ");
+      fprintf(file, "|\n");
+    }
+    /* print table footer */
+    fprintf(file, " +-----+-------------------------+-----------------+----------+-----------------+----------+\n");
+    fprintf(file, " |     |          visual         |      color      | ax dp st |      accum      |   layer  |\n");
+    fprintf(file, " |  id | tp ac gd fm db sw st ms |  sz  r  g  b  a | bf th cl |  sz  r  g  b  a | ov un sw |\n");
+    fprintf(file, " +-----+-------------------------+-----------------+----------+-----------------+----------+\n");
+  }
+  else /* verbose */
+  {
+#if 0
+    fprintf(file, "\n");
+    /* loop through all the pixel formats */
+    for(i = 1; i <= maxpf; i++)
+    {	    
+      DescribePixelFormat(ctx->dc, i, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
+      /* only describe this format if it supports OpenGL */
+      if(!(pfd.dwFlags & PFD_SUPPORT_OPENGL)
+	 || (drawableonly && !(pfd.dwFlags & PFD_DRAW_TO_WINDOW))) continue;
+      fprintf(file, "Visual ID: %2d  depth=%d  class=%s\n", i, pfd.cDepthBits, 
+	     pfd.cColorBits <= 8 ? "PseudoColor" : "TrueColor");
+      fprintf(file, "    bufferSize=%d level=%d renderType=%s doubleBuffer=%d stereo=%d\n", pfd.cColorBits, pfd.bReserved, pfd.iPixelType == PFD_TYPE_RGBA ? "rgba" : "ci", pfd.dwFlags & PFD_DOUBLEBUFFER, pfd.dwFlags & PFD_STEREO);
+      fprintf(file, "    generic=%d generic accelerated=%d\n", (pfd.dwFlags & PFD_GENERIC_FORMAT) == PFD_GENERIC_FORMAT, (pfd.dwFlags & PFD_GENERIC_ACCELERATED) == PFD_GENERIC_ACCELERATED);
+      fprintf(file, "    rgba: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n", pfd.cRedBits, pfd.cGreenBits, pfd.cBlueBits, pfd.cAlphaBits);
+      fprintf(file, "    auxBuffers=%d depthSize=%d stencilSize=%d\n", pfd.cAuxBuffers, pfd.cDepthBits, pfd.cStencilBits);
+      fprintf(file, "    accum: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n", pfd.cAccumRedBits, pfd.cAccumGreenBits, pfd.cAccumBlueBits, pfd.cAccumAlphaBits);
+      fprintf(file, "    multiSample=%d multisampleBuffers=%d\n", 0, 0);
+      fprintf(file, "    Opaque.\n");
+    }
+#endif
+  }
+}
+
+void
+VisualInfoGDI (GLContext* ctx)
+{
+  int i, maxpf;
+  PIXELFORMATDESCRIPTOR pfd;
+
+  /* calling DescribePixelFormat() with NULL pfd (!!!) return maximum
+     number of pixel formats */
+  maxpf = DescribePixelFormat(ctx->dc, 1, 0, NULL);
+
+  if (!verbose)
+  {
+    fprintf(file, "-----------------------------------------------------------------------------\n");
+    fprintf(file, "   visual   x  bf  lv rg d st ge ge  r  g  b a  ax dp st   accum buffs    ms \n");
+    fprintf(file, " id  dep tp sp sz  l  ci b ro ne ac sz sz sz sz bf th cl  sz  r  g  b  a ns b\n");
+    fprintf(file, "-----------------------------------------------------------------------------\n");
+
+    /* loop through all the pixel formats */
+    for(i = 1; i <= maxpf; i++)
+    {
+      DescribePixelFormat(ctx->dc, i, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
+      /* only describe this format if it supports OpenGL */
+      if(!(pfd.dwFlags & PFD_SUPPORT_OPENGL)
+	 || (drawableonly && (pfd.dwFlags & PFD_DRAW_TO_BITMAP))) continue;
+      /* other criteria could be tested here for actual pixel format
+	 choosing in an application:
+	   
+	 for (...each pixel format...) {
+	 if (pfd.dwFlags & PFD_SUPPORT_OPENGL &&
+	 pfd.dwFlags & PFD_DOUBLEBUFFER &&
+	 pfd.cDepthBits >= 24 &&
+	 pfd.cColorBits >= 24)
+	 {
+	 goto found;
+	 }
+	 }
+	 ... not found so exit ...
+	 found:
+	 ... found so use it ...
+      */
+      /* print out the information for this pixel format */
+      fprintf(file, "0x%02x ", i);
+      fprintf(file, "%3d ", pfd.cColorBits);
+      if(pfd.dwFlags & PFD_DRAW_TO_WINDOW) fprintf(file, "wn ");
+      else if(pfd.dwFlags & PFD_DRAW_TO_BITMAP) fprintf(file, "bm ");
+      else fprintf(file, "pb ");
+      /* should find transparent pixel from LAYERPLANEDESCRIPTOR */
+      fprintf(file, " . "); 
+      fprintf(file, "%3d ", pfd.cColorBits);
+      /* bReserved field indicates number of over/underlays */
+      if(pfd.bReserved) fprintf(file, " %d ", pfd.bReserved);
+      else fprintf(file, " . "); 
+      fprintf(file, " %c ", pfd.iPixelType == PFD_TYPE_RGBA ? 'r' : 'c');
+      fprintf(file, "%c ", pfd.dwFlags & PFD_DOUBLEBUFFER ? 'y' : '.');
+      fprintf(file, " %c ", pfd.dwFlags & PFD_STEREO ? 'y' : '.');
+      /* added: */
+      fprintf(file, " %c ", pfd.dwFlags & PFD_GENERIC_FORMAT ? 'y' : '.');
+      fprintf(file, " %c ", pfd.dwFlags & PFD_GENERIC_ACCELERATED ? 'y' : '.');
+      if(pfd.cRedBits && pfd.iPixelType == PFD_TYPE_RGBA) 
+	fprintf(file, "%2d ", pfd.cRedBits);
+      else fprintf(file, " . ");
+      if(pfd.cGreenBits && pfd.iPixelType == PFD_TYPE_RGBA) 
+	fprintf(file, "%2d ", pfd.cGreenBits);
+      else fprintf(file, " . ");
+      if(pfd.cBlueBits && pfd.iPixelType == PFD_TYPE_RGBA) 
+	fprintf(file, "%2d ", pfd.cBlueBits);
+      else fprintf(file, " . ");
+      if(pfd.cAlphaBits && pfd.iPixelType == PFD_TYPE_RGBA) 
+	fprintf(file, "%2d ", pfd.cAlphaBits);
+      else fprintf(file, " . ");
+      if(pfd.cAuxBuffers)     fprintf(file, "%2d ", pfd.cAuxBuffers);
+      else fprintf(file, " . ");
+      if(pfd.cDepthBits)      fprintf(file, "%2d ", pfd.cDepthBits);
+      else fprintf(file, " . ");
+      if(pfd.cStencilBits)    fprintf(file, "%2d ", pfd.cStencilBits);
+      else fprintf(file, " . ");
+      if(pfd.cAccumBits)   fprintf(file, "%3d ", pfd.cAccumBits);
+      else fprintf(file, "  . ");
+      if(pfd.cAccumRedBits)   fprintf(file, "%2d ", pfd.cAccumRedBits);
+      else fprintf(file, " . ");
+      if(pfd.cAccumGreenBits) fprintf(file, "%2d ", pfd.cAccumGreenBits);
+      else fprintf(file, " . ");
+      if(pfd.cAccumBlueBits)  fprintf(file, "%2d ", pfd.cAccumBlueBits);
+      else fprintf(file, " . ");
+      if(pfd.cAccumAlphaBits) fprintf(file, "%2d ", pfd.cAccumAlphaBits);
+      else fprintf(file, " . ");
+      /* no multisample in win32 */
+      fprintf(file, " . .\n");
+    }
+    /* print table footer */
+    fprintf(file, "-----------------------------------------------------------------------------\n");
+    fprintf(file, "   visual   x  bf  lv rg d st ge ge  r  g  b a  ax dp st   accum buffs    ms \n");
+    fprintf(file, " id  dep tp sp sz  l  ci b ro ne ac sz sz sz sz bf th cl  sz  r  g  b  a ns b\n");
+    fprintf(file, "-----------------------------------------------------------------------------\n");
+  }
+  else /* verbose */
+  {
+    fprintf(file, "\n");
+    /* loop through all the pixel formats */
+    for(i = 1; i <= maxpf; i++)
+    {	    
+      DescribePixelFormat(ctx->dc, i, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
+      /* only describe this format if it supports OpenGL */
+      if(!(pfd.dwFlags & PFD_SUPPORT_OPENGL)
+	 || (drawableonly && !(pfd.dwFlags & PFD_DRAW_TO_WINDOW))) continue;
+      fprintf(file, "Visual ID: %2d  depth=%d  class=%s\n", i, pfd.cDepthBits, 
+	     pfd.cColorBits <= 8 ? "PseudoColor" : "TrueColor");
+      fprintf(file, "    bufferSize=%d level=%d renderType=%s doubleBuffer=%ld stereo=%ld\n", pfd.cColorBits, pfd.bReserved, pfd.iPixelType == PFD_TYPE_RGBA ? "rgba" : "ci", pfd.dwFlags & PFD_DOUBLEBUFFER, pfd.dwFlags & PFD_STEREO);
+      fprintf(file, "    generic=%d generic accelerated=%d\n", (pfd.dwFlags & PFD_GENERIC_FORMAT) == PFD_GENERIC_FORMAT, (pfd.dwFlags & PFD_GENERIC_ACCELERATED) == PFD_GENERIC_ACCELERATED);
+      fprintf(file, "    rgba: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n", pfd.cRedBits, pfd.cGreenBits, pfd.cBlueBits, pfd.cAlphaBits);
+      fprintf(file, "    auxBuffers=%d depthSize=%d stencilSize=%d\n", pfd.cAuxBuffers, pfd.cDepthBits, pfd.cStencilBits);
+      fprintf(file, "    accum: redSize=%d greenSize=%d blueSize=%d alphaSize=%d\n", pfd.cAccumRedBits, pfd.cAccumGreenBits, pfd.cAccumBlueBits, pfd.cAccumAlphaBits);
+      fprintf(file, "    multiSample=%d multisampleBuffers=%d\n", 0, 0);
+      fprintf(file, "    Opaque.\n");
+    }
+  }
+}
+
+void
+VisualInfo (GLContext* ctx)
+{
+  if (WGLEW_ARB_pixel_format)
+    VisualInfoARB(ctx);
+  else
+    VisualInfoGDI(ctx);
+}
+
+/* ---------------------------------------------------------------------- */
+
+#elif defined(__APPLE__) && !defined(GLEW_APPLE_GLX)
+
+void
+VisualInfo (GLContext* ctx)
+{
+/*
+  int attrib[] = { AGL_RGBA, AGL_NONE };
+  AGLPixelFormat pf;
+  GLint value;
+  pf = aglChoosePixelFormat(NULL, 0, attrib);
+  while (pf != NULL)
+  {
+    aglDescribePixelFormat(pf, GL_RGBA, &value);
+    fprintf(stderr, "%d\n", value);
+    pf = aglNextPixelFormat(pf);
+  }
+*/
+}
+
+#else /* GLX */
+
+void
+VisualInfo (GLContext* ctx)
+{
+  int n_fbc;
+  GLXFBConfig* fbc;
+  int value, ret, i;
+
+  fbc = glXGetFBConfigs(ctx->dpy, DefaultScreen(ctx->dpy), &n_fbc);
+
+  if (fbc)
+  {
+    if (!verbose)
+    {
+      /* print table header */
+      fprintf(file, " +-----+-------------------------+-----------------+----------+-------------+-------+------+\n");
+      fprintf(file, " |     |        visual           |      color      | ax dp st |    accum    |   ms  |  cav |\n");
+      fprintf(file, " |  id | tp xr cl fm db st lv xp |  sz  r  g  b  a | bf th cl | r  g  b  a  | ns  b |  eat |\n");
+      fprintf(file, " +-----+-------------------------+-----------------+----------+-------------+-------+------+\n");
+      /* loop through all the fbcs */
+      for (i=0; i<n_fbc; i++)
+      {
+        /* print out the information for this fbc */
+        /* visual id */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_FBCONFIG_ID, &value);
+        if (ret != Success)
+        {
+          fprintf(file, "|  ?  |");
+        }
+        else
+        {
+          fprintf(file, " |% 4d | ", value);
+        }
+        /* visual type */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_DRAWABLE_TYPE, &value);
+        if (ret != Success)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          if (value & GLX_WINDOW_BIT)
+          {
+            if (value & GLX_PBUFFER_BIT)
+            {
+              fprintf(file, "wp ");
+            }
+            else
+            {
+              fprintf(file, "wn ");
+            }
+          }
+          else
+          {
+            if (value & GLX_PBUFFER_BIT)
+            {
+              fprintf(file, "pb ");
+            }
+            else if (value & GLX_PIXMAP_BIT)
+            {
+              fprintf(file, "pm ");
+            }
+            else
+            {
+              fprintf(file, " ? ");
+            }
+          }
+        }
+        /* x renderable */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_X_RENDERABLE, &value);
+        if (ret != Success)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          fprintf(file, value ? " y " : " n ");
+        }
+        /* class */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_X_VISUAL_TYPE, &value);
+        if (ret != Success)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          if (GLX_TRUE_COLOR == value)
+            fprintf(file, "tc ");
+          else if (GLX_DIRECT_COLOR == value)
+            fprintf(file, "dc ");
+          else if (GLX_PSEUDO_COLOR == value)
+            fprintf(file, "pc ");
+          else if (GLX_STATIC_COLOR == value)
+            fprintf(file, "sc ");
+          else if (GLX_GRAY_SCALE == value)
+            fprintf(file, "gs ");
+          else if (GLX_STATIC_GRAY == value)
+            fprintf(file, "sg ");
+          else if (GLX_X_VISUAL_TYPE == value)
+            fprintf(file, " . ");
+          else
+            fprintf(file, " ? ");
+        }
+        /* format */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_RENDER_TYPE, &value);
+        if (ret != Success)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          if (GLXEW_NV_float_buffer)
+          {
+            int ret2, value2;
+            ret2 = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_FLOAT_COMPONENTS_NV, &value2);
+            if (Success == ret2 && GL_TRUE == value2)
+            {
+              fprintf(file, " f ");
+            }
+            else if (value & GLX_RGBA_BIT)
+              fprintf(file, " i ");
+            else if (value & GLX_COLOR_INDEX_BIT)
+              fprintf(file, " c ");
+            else
+              fprintf(file, " ? ");
+          }
+          else
+          {
+            if (value & GLX_RGBA_FLOAT_ATI_BIT)
+              fprintf(file, " f ");
+            else if (value & GLX_RGBA_BIT)
+              fprintf(file, " i ");
+            else if (value & GLX_COLOR_INDEX_BIT)
+              fprintf(file, " c ");
+            else
+              fprintf(file, " ? ");
+          }
+        }
+        /* double buffer */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_DOUBLEBUFFER, &value);
+        fprintf(file, " %c ", Success != ret ? '?' : (value ? 'y' : '.'));
+        /* stereo */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_STEREO, &value);
+        fprintf(file, " %c ", Success != ret ? '?' : (value ? 'y' : '.'));
+        /* level */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_LEVEL, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          fprintf(file, "%2d ", value);
+        }
+        /* transparency */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_TRANSPARENT_TYPE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? | ");
+        }
+        else
+        {
+          if (GLX_TRANSPARENT_RGB == value)
+            fprintf(file, " r | ");
+          else if (GLX_TRANSPARENT_INDEX == value)
+            fprintf(file, " i | ");
+          else if (GLX_NONE == value)
+            fprintf(file, " . | ");
+          else
+            fprintf(file, " ? | ");
+        }
+        /* color size */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_BUFFER_SIZE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, "  ? ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%3d ", value);
+          else
+            fprintf(file, "  . ");
+        }
+        /* red size */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_RED_SIZE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%2d ", value);
+          else
+            fprintf(file, " . ");
+        }
+        /* green size */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_GREEN_SIZE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%2d ", value);
+          else
+            fprintf(file, " . ");
+        }
+        /* blue size */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_BLUE_SIZE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%2d ", value);
+          else
+            fprintf(file, " . ");
+        }
+        /* alpha size */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_ALPHA_SIZE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? | ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%2d | ", value);
+          else
+            fprintf(file, " . | ");
+        }
+        /* aux buffers */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_AUX_BUFFERS, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%2d ", value);
+          else
+            fprintf(file, " . ");
+        }
+        /* depth size */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_DEPTH_SIZE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%2d ", value);
+          else
+            fprintf(file, " . ");
+        }
+        /* stencil size */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_STENCIL_SIZE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? | ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%2d | ", value);
+          else
+            fprintf(file, " . | ");
+        }
+        /* accum red size */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_ACCUM_RED_SIZE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%2d ", value);
+          else
+            fprintf(file, " . ");
+        }
+        /* accum green size */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_ACCUM_GREEN_SIZE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%2d ", value);
+          else
+            fprintf(file, " . ");
+        }
+        /* accum blue size */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_ACCUM_BLUE_SIZE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%2d ", value);
+          else
+            fprintf(file, " . ");
+        }
+        /* accum alpha size */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_ACCUM_ALPHA_SIZE, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? | ");
+        }
+        else
+        {
+          if (value)
+            fprintf(file, "%2d | ", value);
+          else
+            fprintf(file, " . | ");
+        }
+        /* multisample */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_SAMPLES, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? ");
+        }
+        else
+        {
+          fprintf(file, "%2d ", value);
+        }
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_SAMPLE_BUFFERS, &value);
+        if (Success != ret)
+        {
+          fprintf(file, " ? | ");
+        }
+        else
+        {
+          fprintf(file, "%2d | ", value);
+        }
+        /* caveat */
+        ret = glXGetFBConfigAttrib(ctx->dpy, fbc[i], GLX_CONFIG_CAVEAT, &value);
+        if (Success != ret)
+        {
+          fprintf(file, "???? |");
+        }
+        else
+        {
+          if (GLX_NONE == value)
+            fprintf(file, "none |\n");
+          else if (GLX_SLOW_CONFIG == value)
+            fprintf(file, "slow |\n");
+          else if (GLX_NON_CONFORMANT_CONFIG == value)
+            fprintf(file, "ncft |\n");
+          else
+            fprintf(file, "???? |\n");
+        }
+      }
+      /* print table footer */
+      fprintf(file, " +-----+-------------------------+-----------------+----------+-------------+-------+------+\n");
+      fprintf(file, " |  id | tp xr cl fm db st lv xp |  sz  r  g  b  a | bf th cl | r  g  b  a  | ns  b |  eat |\n");
+      fprintf(file, " |     |        visual           |      color      | ax dp st |    accum    |   ms  |  cav |\n");
+      fprintf(file, " +-----+-------------------------+-----------------+----------+-------------+-------+------+\n");
+    }
+  }
+}
+
+#endif
+
+/* ------------------------------------------------------------------------ */
+
+#if defined(_WIN32)
+
+void InitContext (GLContext* ctx)
+{
+  ctx->wnd = NULL;
+  ctx->dc = NULL;
+  ctx->rc = NULL;
+}
+
+GLboolean CreateContext (GLContext* ctx)
+{
+  WNDCLASS wc;
+  PIXELFORMATDESCRIPTOR pfd;
+  /* check for input */
+  if (NULL == ctx) return GL_TRUE;
+  /* register window class */
+  ZeroMemory(&wc, sizeof(WNDCLASS));
+  wc.hInstance = GetModuleHandle(NULL);
+  wc.lpfnWndProc = DefWindowProc;
+  wc.lpszClassName = "GLEW";
+  if (0 == RegisterClass(&wc)) return GL_TRUE;
+  /* create window */
+  ctx->wnd = CreateWindow("GLEW", "GLEW", 0, CW_USEDEFAULT, CW_USEDEFAULT, 
+                          CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, 
+                          GetModuleHandle(NULL), NULL);
+  if (NULL == ctx->wnd) return GL_TRUE;
+  /* get the device context */
+  ctx->dc = GetDC(ctx->wnd);
+  if (NULL == ctx->dc) return GL_TRUE;
+  /* find pixel format */
+  ZeroMemory(&pfd, sizeof(PIXELFORMATDESCRIPTOR));
+  if (visual == -1) /* find default */
+  {
+    pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
+    pfd.nVersion = 1;
+    pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL;
+    visual = ChoosePixelFormat(ctx->dc, &pfd);
+    if (0 == visual) return GL_TRUE;
+  }
+  /* set the pixel format for the dc */
+  if (FALSE == SetPixelFormat(ctx->dc, visual, &pfd)) return GL_TRUE;
+  /* create rendering context */
+  ctx->rc = wglCreateContext(ctx->dc);
+  if (NULL == ctx->rc) return GL_TRUE;
+  if (FALSE == wglMakeCurrent(ctx->dc, ctx->rc)) return GL_TRUE;
+  return GL_FALSE;
+}
+
+void DestroyContext (GLContext* ctx)
+{
+  if (NULL == ctx) return;
+  if (NULL != ctx->rc) wglMakeCurrent(NULL, NULL);
+  if (NULL != ctx->rc) wglDeleteContext(wglGetCurrentContext());
+  if (NULL != ctx->wnd && NULL != ctx->dc) ReleaseDC(ctx->wnd, ctx->dc);
+  if (NULL != ctx->wnd) DestroyWindow(ctx->wnd);
+  UnregisterClass("GLEW", GetModuleHandle(NULL));
+}
+
+/* ------------------------------------------------------------------------ */
+
+#elif defined(__APPLE__) && !defined(GLEW_APPLE_GLX)
+
+void InitContext (GLContext* ctx)
+{
+  ctx->ctx = NULL;
+  ctx->octx = NULL;
+}
+
+GLboolean CreateContext (GLContext* ctx)
+{
+  int attrib[] = { AGL_RGBA, AGL_NONE };
+  AGLPixelFormat pf;
+  /* check input */
+  if (NULL == ctx) return GL_TRUE;
+  /*int major, minor;
+  SetPortWindowPort(wnd);
+  aglGetVersion(&major, &minor);
+  fprintf(stderr, "GL %d.%d\n", major, minor);*/
+  pf = aglChoosePixelFormat(NULL, 0, attrib);
+  if (NULL == pf) return GL_TRUE;
+  ctx->ctx = aglCreateContext(pf, NULL);
+  if (NULL == ctx->ctx || AGL_NO_ERROR != aglGetError()) return GL_TRUE;
+  aglDestroyPixelFormat(pf);
+  /*aglSetDrawable(ctx, GetWindowPort(wnd));*/
+  ctx->octx = aglGetCurrentContext();
+  if (NULL == aglSetCurrentContext(ctx->ctx)) return GL_TRUE;
+  return GL_FALSE;
+}
+
+void DestroyContext (GLContext* ctx)
+{
+  if (NULL == ctx) return;
+  aglSetCurrentContext(ctx->octx);
+  if (NULL != ctx->ctx) aglDestroyContext(ctx->ctx);
+}
+
+/* ------------------------------------------------------------------------ */
+
+#else /* __UNIX || (__APPLE__ && GLEW_APPLE_GLX) */
+
+void InitContext (GLContext* ctx)
+{
+  ctx->dpy = NULL;
+  ctx->vi = NULL;
+  ctx->ctx = NULL;
+  ctx->wnd = 0;
+  ctx->cmap = 0;
+}
+
+GLboolean CreateContext (GLContext* ctx)
+{
+  int attrib[] = { GLX_RGBA, GLX_DOUBLEBUFFER, None };
+  int erb, evb;
+  XSetWindowAttributes swa;
+  /* check input */
+  if (NULL == ctx) return GL_TRUE;
+  /* open display */
+  ctx->dpy = XOpenDisplay(display);
+  if (NULL == ctx->dpy) return GL_TRUE;
+  /* query for glx */
+  if (!glXQueryExtension(ctx->dpy, &erb, &evb)) return GL_TRUE;
+  /* choose visual */
+  ctx->vi = glXChooseVisual(ctx->dpy, DefaultScreen(ctx->dpy), attrib);
+  if (NULL == ctx->vi) return GL_TRUE;
+  /* create context */
+  ctx->ctx = glXCreateContext(ctx->dpy, ctx->vi, None, True);
+  if (NULL == ctx->ctx) return GL_TRUE;
+  /* create window */
+  /*wnd = XCreateSimpleWindow(dpy, RootWindow(dpy, vi->screen), 0, 0, 1, 1, 1, 0, 0);*/
+  ctx->cmap = XCreateColormap(ctx->dpy, RootWindow(ctx->dpy, ctx->vi->screen),
+                              ctx->vi->visual, AllocNone);
+  swa.border_pixel = 0;
+  swa.colormap = ctx->cmap;
+  ctx->wnd = XCreateWindow(ctx->dpy, RootWindow(ctx->dpy, ctx->vi->screen), 
+                           0, 0, 1, 1, 0, ctx->vi->depth, InputOutput, ctx->vi->visual, 
+                           CWBorderPixel | CWColormap, &swa);
+  /* make context current */
+  if (!glXMakeCurrent(ctx->dpy, ctx->wnd, ctx->ctx)) return GL_TRUE;
+  return GL_FALSE;
+}
+
+void DestroyContext (GLContext* ctx)
+{
+  if (NULL != ctx->dpy && NULL != ctx->ctx) glXDestroyContext(ctx->dpy, ctx->ctx);
+  if (NULL != ctx->dpy && 0 != ctx->wnd) XDestroyWindow(ctx->dpy, ctx->wnd);
+  if (NULL != ctx->dpy && 0 != ctx->cmap) XFreeColormap(ctx->dpy, ctx->cmap);
+  if (NULL != ctx->vi) XFree(ctx->vi);
+  if (NULL != ctx->dpy) XCloseDisplay(ctx->dpy);
+}
+
+#endif /* __UNIX || (__APPLE__ && GLEW_APPLE_GLX) */
+
+GLboolean ParseArgs (int argc, char** argv)
+{
+  int p = 0;
+  while (p < argc)
+  {
+#if defined(_WIN32)
+    if (!strcmp(argv[p], "-pf") || !strcmp(argv[p], "-pixelformat"))
+    {
+      if (++p >= argc) return GL_TRUE;
+      display = NULL;
+      visual = strtol(argv[p], NULL, 0);
+    }
+    else if (!strcmp(argv[p], "-a"))
+    {
+      showall = 1;
+    }
+    else if (!strcmp(argv[p], "-s"))
+    {
+      displaystdout = 1;
+    }
+    else if (!strcmp(argv[p], "-h"))
+    {
+      return GL_TRUE;
+    }
+    else
+      return GL_TRUE;
+#else
+    if (!strcmp(argv[p], "-display"))
+    {
+      if (++p >= argc) return GL_TRUE;
+      display = argv[p];
+    }
+    else if (!strcmp(argv[p], "-visual"))
+    {
+      if (++p >= argc) return GL_TRUE;
+      visual = (int)strtol(argv[p], NULL, 0);
+    }
+    else if (!strcmp(argv[p], "-h"))
+    {
+      return GL_TRUE;
+    }
+    else
+      return GL_TRUE;
+#endif
+    p++;
+  }
+  return GL_FALSE;
+}