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      1 /**************************************************************************
      2  *
      3  * Copyright 2008 VMware, Inc.
      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 above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
     22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25  *
     26  **************************************************************************/
     27 
     28 #include <windows.h>
     29 
     30 #define WGL_WGLEXT_PROTOTYPES
     31 
     32 #include <GL/gl.h>
     33 #include <GL/wglext.h>
     34 
     35 #include "glapi/glapi.h"
     36 #include "stw_device.h"
     37 #include "stw_icd.h"
     38 #include "stw_nopfuncs.h"
     39 
     40 #include "util/u_debug.h"
     41 
     42 struct stw_extension_entry
     43 {
     44    const char *name;
     45    PROC proc;
     46 };
     47 
     48 #define STW_EXTENSION_ENTRY(P) { #P, (PROC) P }
     49 
     50 static const struct stw_extension_entry stw_extension_entries[] = {
     51 
     52    /* WGL_ARB_extensions_string */
     53    STW_EXTENSION_ENTRY( wglGetExtensionsStringARB ),
     54 
     55    /* WGL_ARB_pbuffer */
     56    STW_EXTENSION_ENTRY( wglCreatePbufferARB ),
     57    STW_EXTENSION_ENTRY( wglGetPbufferDCARB ),
     58    STW_EXTENSION_ENTRY( wglReleasePbufferDCARB ),
     59    STW_EXTENSION_ENTRY( wglDestroyPbufferARB ),
     60    STW_EXTENSION_ENTRY( wglQueryPbufferARB ),
     61 
     62    /* WGL_ARB_pixel_format */
     63    STW_EXTENSION_ENTRY( wglChoosePixelFormatARB ),
     64    STW_EXTENSION_ENTRY( wglGetPixelFormatAttribfvARB ),
     65    STW_EXTENSION_ENTRY( wglGetPixelFormatAttribivARB ),
     66 
     67    /* WGL_EXT_extensions_string */
     68    STW_EXTENSION_ENTRY( wglGetExtensionsStringEXT ),
     69 
     70    /* WGL_EXT_swap_interval */
     71    STW_EXTENSION_ENTRY( wglGetSwapIntervalEXT ),
     72    STW_EXTENSION_ENTRY( wglSwapIntervalEXT ),
     73 
     74    /* WGL_ARB_create_context */
     75    STW_EXTENSION_ENTRY( wglCreateContextAttribsARB ),
     76 
     77    /* WGL_ARB_render_texture */
     78    STW_EXTENSION_ENTRY( wglBindTexImageARB ),
     79    STW_EXTENSION_ENTRY( wglReleaseTexImageARB ),
     80    STW_EXTENSION_ENTRY( wglSetPbufferAttribARB ),
     81 
     82    { NULL, NULL }
     83 };
     84 
     85 PROC APIENTRY
     86 DrvGetProcAddress(
     87    LPCSTR lpszProc )
     88 {
     89    const struct stw_extension_entry *entry;
     90    PROC p;
     91 
     92    if (!stw_dev)
     93       return NULL;
     94 
     95    if (lpszProc[0] == 'w' && lpszProc[1] == 'g' && lpszProc[2] == 'l')
     96       for (entry = stw_extension_entries; entry->name; entry++)
     97          if (strcmp( lpszProc, entry->name ) == 0)
     98             return entry->proc;
     99 
    100    if (lpszProc[0] == 'g' && lpszProc[1] == 'l') {
    101       p = (PROC) _glapi_get_proc_address(lpszProc);
    102       if (p)
    103          return p;
    104    }
    105 
    106    /* If we get here, we'd normally just return NULL, but since some apps
    107     * (like Viewperf12) crash when they try to use the null pointer, try
    108     * returning a pointer to a no-op function instead.
    109     */
    110    p = stw_get_nop_function(lpszProc);
    111    if (p) {
    112       debug_printf("wglGetProcAddress(\"%s\") returning no-op function\n",
    113                    lpszProc);
    114       return p;
    115    }
    116 
    117    debug_printf("wglGetProcAddress(\"%s\") returning NULL\n", lpszProc);
    118    return NULL;
    119 }
    120