From 225517aff0afc3270fab277d1c9ac2864053820c Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Fri, 13 Jun 2003 21:49:46 +0000
Subject: GLUT for OS/2 (Evgeny Kotsuba)

---
 src/glut/os2/os2_glx.cpp | 146 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 src/glut/os2/os2_glx.cpp

(limited to 'src/glut/os2/os2_glx.cpp')

diff --git a/src/glut/os2/os2_glx.cpp b/src/glut/os2/os2_glx.cpp
new file mode 100644
index 0000000000..ca345ea05b
--- /dev/null
+++ b/src/glut/os2/os2_glx.cpp
@@ -0,0 +1,146 @@
+/* os2_glx.c */
+
+#include <stdio.h>
+#include <string.h>
+#include <malloc.h>
+#include "gl/gl.h"
+#include "WarpGL.h"
+#include "GL/os2mesa.h"
+
+#define POKA 0
+/* global current HDC */
+
+XVisualInfo *wglDescribePixelFormat(int iPixelFormat);
+
+extern HDC XHDC;
+extern HWND XHWND;
+//extern HPS hpsCurrent;
+extern HAB   hab;      /* PM anchor block handle */
+
+GLXContext
+glXCreateContext(HPS hps, XVisualInfo * visinfo,
+  GLXContext share, Bool direct)
+{
+  /* KLUDGE: GLX really expects a display pointer to be passed
+     in as the first parameter, but Win32 needs an HDC instead,
+     so BE SURE that the global XHDC is set before calling this
+     routine. */
+  HGLRC context;
+
+  context = wglCreateContext(XHDC,hps,hab);
+
+
+  /* Since direct rendering is implicit, the direct flag is
+     ignored. */
+
+  return context;
+}
+
+
+int
+glXGetConfig(XVisualInfo * visual, int attrib, int *value)
+{
+  if (!visual)
+    return GLX_BAD_VISUAL;
+
+  switch (attrib) {
+  case GLX_USE_GL:
+    if (visual->dwFlags & (PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW)) {
+      /* XXX Brad's Matrix Millenium II has problems creating
+         color index windows in 24-bit mode (lead to GDI crash)
+         and 32-bit mode (lead to black window).  The cColorBits
+         filed of the PIXELFORMATDESCRIPTOR returned claims to
+         have 24 and 32 bits respectively of color indices. 2^24
+         and 2^32 are ridiculously huge writable colormaps.
+         Assume that if we get back a color index
+         PIXELFORMATDESCRIPTOR with 24 or more bits, the
+         PIXELFORMATDESCRIPTOR doesn't really work and skip it.
+         -mjk */
+      if (visual->iPixelType == PFD_TYPE_COLORINDEX
+        && visual->cColorBits >= 24) {
+        *value = 0;
+      } else {
+       *value = 1;
+      }
+    } else {
+      *value = 0;
+    }
+    break;
+  case GLX_BUFFER_SIZE:
+    /* KLUDGE: if we're RGBA, return the number of bits/pixel,
+       otherwise, return 8 (we guessed at 256 colors in CI
+       mode). */
+    if (visual->iPixelType == PFD_TYPE_RGBA)
+      *value = visual->cColorBits;
+    else
+      *value = 8;
+    break;
+  case GLX_LEVEL:
+    /* The bReserved flag of the pfd contains the
+       overlay/underlay info. */
+    *value = visual->bReserved;
+    break;
+  case GLX_RGBA:
+    *value = visual->iPixelType == PFD_TYPE_RGBA;
+    break;
+  case GLX_DOUBLEBUFFER:
+    *value = visual->dwFlags & PFD_DOUBLEBUFFER;
+    break;
+  case GLX_STEREO:
+    *value = visual->dwFlags & PFD_STEREO;
+    break;
+  case GLX_AUX_BUFFERS:
+    *value = visual->cAuxBuffers;
+    break;
+  case GLX_RED_SIZE:
+    *value = visual->cRedBits;
+    break;
+  case GLX_GREEN_SIZE:
+    *value = visual->cGreenBits;
+    break;
+  case GLX_BLUE_SIZE:
+    *value = visual->cBlueBits;
+    break;
+  case GLX_ALPHA_SIZE:
+    *value = visual->cAlphaBits;
+    break;
+  case GLX_DEPTH_SIZE:
+    *value = visual->cDepthBits;
+    break;
+  case GLX_STENCIL_SIZE:
+    *value = visual->cStencilBits;
+    break;
+  case GLX_ACCUM_RED_SIZE:
+    *value = visual->cAccumRedBits;
+    break;
+  case GLX_ACCUM_GREEN_SIZE:
+    *value = visual->cAccumGreenBits;
+    break;
+  case GLX_ACCUM_BLUE_SIZE:
+    *value = visual->cAccumBlueBits;
+    break;
+  case GLX_ACCUM_ALPHA_SIZE:
+    *value = visual->cAccumAlphaBits;
+    break;
+#if POKA == 100
+#endif /*  POKA == 100 */
+  default:
+    return GLX_BAD_ATTRIB;
+  }
+  return 0;
+}
+
+
+XVisualInfo * glXChooseVisual(int mode)
+{  int imode = 2;
+   if(mode & GLUT_DOUBLE)
+            imode = 1;
+   return
+         wglDescribePixelFormat(imode);
+}
+
+
+#if POKA
+#endif /* POKA */
+
+
\ No newline at end of file
-- 
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