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OS/2 Shareware BBS: 10 Tools
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10-Tools.zip
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mesa5.zip
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mesa5src.zip
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MesaDLL
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os2_glx.cpp
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2000-02-10
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/* 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(Display * display, 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,hpsCurrent,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 */