src/gallium/state_trackers/python/st_hardpipe_winsys.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Bismarck, ND., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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  19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  *
  26  *
  27  **************************************************************************/
  28
  29 /**
  30  * @file
  31  * Get a hardware accelerated Gallium screen/context from the OpenGL driver.
  32  */
  33
  34
  35 #include "pipe/p_compiler.h"
  36
  37 #ifdef PIPE_OS_WINDOWS
  38 #include <windows.h>
  39 #include <GL/gl.h>
  40 #else
  41 #include <X11/Xlib.h>
  42 #include <X11/Xutil.h>
  43 #include <GL/gl.h>
  44 #include <GL/glx.h>
  45 #endif
  46
  47 #include "st_winsys.h"
  48
  49
  50 typedef struct pipe_screen * (GLAPIENTRY *PFNGETGALLIUMSCREENMESAPROC) (void);
  51 typedef struct pipe_context * (GLAPIENTRY* PFNCREATEGALLIUMCONTEXTMESAPROC) (void);
  52
  53 static PFNGETGALLIUMSCREENMESAPROC pfnGetGalliumScreenMESA = NULL;
  54 static PFNCREATEGALLIUMCONTEXTMESAPROC pfnCreateGalliumContextMESA = NULL;
  55
  56
  57 #ifdef PIPE_OS_WINDOWS
  58
  59 static INLINE boolean
  60 st_hardpipe_load(void)
  61 {
  62    WNDCLASS wc;
  63    HWND hwnd;
  64    HGLRC hglrc;
  65    HDC hdc;
  66    PIXELFORMATDESCRIPTOR pfd;
  67    int iPixelFormat;
  68
  69    if(pfnGetGalliumScreenMESA && pfnCreateGalliumContextMESA)
  70       return TRUE;
  71
  72    memset(&wc, 0, sizeof wc);
  73    wc.lpfnWndProc = DefWindowProc;
  74    wc.lpszClassName = "gallium";
  75    wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
  76    RegisterClass(&wc);
  77
  78    hwnd = CreateWindow(wc.lpszClassName, "gallium", 0, 0, 0, 0, 0, NULL, 0, wc.hInstance, NULL);
  79    if (!hwnd)
  80       return FALSE;
  81
  82    hdc = GetDC(hwnd);
  83    if (!hdc)
  84       return FALSE;
  85
  86    pfd.cColorBits = 3;
  87    pfd.cRedBits = 1;
  88    pfd.cGreenBits = 1;
  89    pfd.cBlueBits = 1;
  90    pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL;
  91    pfd.iLayerType = PFD_MAIN_PLANE;
  92    pfd.iPixelType = PFD_TYPE_RGBA;
  93    pfd.nSize = sizeof(pfd);
  94    pfd.nVersion = 1;
  95
  96    iPixelFormat = ChoosePixelFormat(hdc, &pfd);
  97    if (!iPixelFormat) {
  98       pfd.dwFlags |= PFD_DOUBLEBUFFER;
  99       iPixelFormat = ChoosePixelFormat(hdc, &pfd);
 100    }
 101    if (!iPixelFormat)
 102       return FALSE;
 103
 104    SetPixelFormat(hdc, iPixelFormat, &pfd);
 105    hglrc = wglCreateContext(hdc);
 106    if (!hglrc)
 107       return FALSE;
 108
 109    if (!wglMakeCurrent(hdc, hglrc))
 110       return FALSE;
 111
 112    pfnGetGalliumScreenMESA = (PFNGETGALLIUMSCREENMESAPROC)wglGetProcAddress("wglGetGalliumScreenMESA");
 113    if(!pfnGetGalliumScreenMESA)
 114       return FALSE;
 115
 116    pfnCreateGalliumContextMESA = (PFNCREATEGALLIUMCONTEXTMESAPROC)wglGetProcAddress("wglCreateGalliumContextMESA");
 117    if(!pfnCreateGalliumContextMESA)
 118       return FALSE;
 119
 120    DestroyWindow(hwnd);
 121
 122    return TRUE;
 123 }
 124
 125 #else
 126
 127 static INLINE boolean
 128 st_hardpipe_load(void)
 129 {
 130    Display *dpy;
 131    int scrnum;
 132    Window root;
 133    int attribSingle[] = {
 134       GLX_RGBA,
 135       GLX_RED_SIZE, 1,
 136       GLX_GREEN_SIZE, 1,
 137       GLX_BLUE_SIZE, 1,
 138       None };
 139    int attribDouble[] = {
 140       GLX_RGBA,
 141       GLX_RED_SIZE, 1,
 142       GLX_GREEN_SIZE, 1,
 143       GLX_BLUE_SIZE, 1,
 144       GLX_DOUBLEBUFFER,
 145       None };
 146    XVisualInfo *visinfo;
 147    GLXContext ctx = NULL;
 148    XSetWindowAttributes attr;
 149    unsigned long mask;
 150    int width = 100, height = 100;
 151    Window win;
 152
 153    dpy = XOpenDisplay(NULL);
 154    if (!dpy)
 155       return FALSE;
 156
 157    scrnum = 0;
 158
 159    root = RootWindow(dpy, scrnum);
 160
 161    visinfo = glXChooseVisual(dpy, scrnum, attribSingle);
 162    if (!visinfo)
 163       visinfo = glXChooseVisual(dpy, scrnum, attribDouble);
 164    if (!visinfo)
 165       return FALSE;
 166
 167    ctx = glXCreateContext( dpy, visinfo, NULL, True );
 168
 169    if (!ctx)
 170       return FALSE;
 171
 172    attr.background_pixel = 0;
 173    attr.border_pixel = 0;
 174    attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
 175    attr.event_mask = StructureNotifyMask | ExposureMask;
 176
 177    mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
 178
 179    win = XCreateWindow(dpy, root, 0, 0, width, height,
 180                        0, visinfo->depth, InputOutput,
 181                        visinfo->visual, mask, &attr);
 182
 183    if (!glXMakeCurrent(dpy, win, ctx))
 184       return FALSE;
 185
 186    pfnGetGalliumScreenMESA = (PFNGETGALLIUMSCREENMESAPROC)glXGetProcAddressARB((const GLubyte *)"glXGetGalliumScreenMESA");
 187    if(!pfnGetGalliumScreenMESA)
 188       return FALSE;
 189
 190    pfnCreateGalliumContextMESA = (PFNCREATEGALLIUMCONTEXTMESAPROC)glXGetProcAddressARB((const GLubyte *)"glXCreateGalliumContextMESA");
 191    if(!pfnCreateGalliumContextMESA)
 192       return FALSE;
 193
 194    glXDestroyContext(dpy, ctx);
 195    XFree(visinfo);
 196    XDestroyWindow(dpy, win);
 197    XCloseDisplay(dpy);
 198
 199    return TRUE;
 200 }
 201
 202 #endif
 203
 204
 205 struct pipe_screen *
 206 st_hardware_screen_create(void)
 207 {
 208    if(st_hardpipe_load())
 209       return pfnGetGalliumScreenMESA();
 210    else
 211       return st_software_screen_create();
 212 }