src/gallium/frontends/wgl/stw_ext_context.c - third_party/mesa - Git at Google

 /*
  * Mesa 3-D graphics library
  *
  * Copyright (C) 2011 Morgan Armand <morgan.devel@gmail.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included
  * in all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  */

 #include <stdio.h>
 #include <windows.h>

 #define WGL_WGLEXT_PROTOTYPES

 #include <GL/gl.h>
 #include <GL/wglext.h>

 #include "gldrv.h"
 #include "stw_context.h"
 #include "stw_device.h"
 #include "stw_ext_context.h"

 #include "util/u_debug.h"


 static wglCreateContext_t g_pfnwglCreateContext = NULL;
 static wglDeleteContext_t g_pfnwglDeleteContext = NULL;

 /* When this library is used as a opengl32.dll drop-in replacement, ensure we
  * use the wglCreate/Destroy entrypoints above, and not the true opengl32.dll,
  * which could happen if this library's name is not opengl32.dll exactly.
  *
  * For example, Qt 5.4 bundles this as opengl32sw.dll:
  * https://blog.qt.io/blog/2014/11/27/qt-weekly-21-dynamic-opengl-implementation-loading-in-qt-5-4/
  */
 void
 stw_override_opengl32_entry_points(wglCreateContext_t create, wglDeleteContext_t delete)
 {
    g_pfnwglCreateContext = create;
    g_pfnwglDeleteContext = delete;
 }


 /**
  * The implementation of this function is tricky.  The OPENGL32.DLL library
  * remaps the context IDs returned by our stw_create_context_attribs()
  * function to different values returned to the caller of wglCreateContext().
  * That is, DHGLRC (driver) handles are not equivalent to HGLRC (public)
  * handles.
  *
  * So we need to generate a new HGLRC ID here.  We do that by calling
  * the regular wglCreateContext() function.  Then, we replace the newly-
  * created stw_context with a new stw_context that reflects the arguments
  * to this function.
  */
 HGLRC WINAPI
 wglCreateContextAttribsARB(HDC hDC, HGLRC hShareContext, const int *attribList)
 {
    HGLRC context;

    int majorVersion = 1, minorVersion = 0, layerPlane = 0;
    int contextFlags = 0x0;
    int profileMask = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
    int resetStrategy = WGL_NO_RESET_NOTIFICATION_ARB;
    int i;
    BOOL done = FALSE;
    const int contextFlagsAll = (WGL_CONTEXT_DEBUG_BIT_ARB |
                                 WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB |
                                 WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB);

    if (!stw_dev)
       return NULL;

    /* parse attrib_list */
    if (attribList) {
       for (i = 0; !done && attribList[i]; i++) {
          switch (attribList[i]) {
          case WGL_CONTEXT_MAJOR_VERSION_ARB:
             majorVersion = attribList[++i];
             break;
          case WGL_CONTEXT_MINOR_VERSION_ARB:
             minorVersion = attribList[++i];
             break;
          case WGL_CONTEXT_LAYER_PLANE_ARB:
             layerPlane = attribList[++i];
             break;
          case WGL_CONTEXT_FLAGS_ARB:
             contextFlags = attribList[++i];
             break;
          case WGL_CONTEXT_PROFILE_MASK_ARB:
             profileMask = attribList[++i];
             break;
          case WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB:
             resetStrategy = attribList[++i];
             break;
          case 0:
             /* end of list */
             done = TRUE;
             break;
          default:
             /* bad attribute */
             SetLastError(ERROR_INVALID_PARAMETER);
             return 0;
          }
       }
    }

    /* check contextFlags */
    if (contextFlags & ~contextFlagsAll) {
       SetLastError(ERROR_INVALID_PARAMETER);
       return NULL;
    }

    /* check profileMask */
    if (profileMask != WGL_CONTEXT_CORE_PROFILE_BIT_ARB &&
        profileMask != WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB &&
        profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT) {
       SetLastError(ERROR_INVALID_PROFILE_ARB);
       return NULL;
    }

    /* check version (generate ERROR_INVALID_VERSION_ARB if bad) */
    if (majorVersion <= 0 ||
        minorVersion < 0 ||
        (profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
         ((majorVersion == 1 && minorVersion > 5) ||
          (majorVersion == 2 && minorVersion > 1) ||
          (majorVersion == 3 && minorVersion > 3) ||
          (majorVersion == 4 && minorVersion > 6) ||
          majorVersion > 4)) ||
        (profileMask == WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
         ((majorVersion == 1 && minorVersion > 1) ||
          (majorVersion == 2 && minorVersion > 0) ||
          (majorVersion == 3 && minorVersion > 1) ||
          majorVersion > 3))) {
       SetLastError(ERROR_INVALID_VERSION_ARB);
       return NULL;
    }

    if ((contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
        majorVersion < 3) {
       SetLastError(ERROR_INVALID_VERSION_ARB);
       return 0;
    }

    if (resetStrategy != WGL_NO_RESET_NOTIFICATION_ARB &&
        resetStrategy != WGL_LOSE_CONTEXT_ON_RESET_ARB) {
       SetLastError(ERROR_INVALID_PARAMETER);
       return NULL;
    }

    wglCreateContext_t pfnwglCreateContext;
    wglDeleteContext_t pfnwglDeleteContext;

    if (stw_dev->callbacks.pfnGetDhglrc) {
       /* Used as an ICD.
        *
        * Get pointers to OPENGL32.DLL's wglCreate/DeleteContext() functions
        */
       HMODULE opengl_lib = GetModuleHandleA("opengl32.dll");
       if (!opengl_lib) {
          _debug_printf("wgl: GetModuleHandleA(\"opengl32.dll\") failed\n");
          return NULL;
       }

       pfnwglCreateContext = (wglCreateContext_t)
          GetProcAddress(opengl_lib, "wglCreateContext");
       if (!pfnwglCreateContext) {
          _debug_printf("wgl: failed to get wglCreateContext()\n");
          return NULL;
       }

       pfnwglDeleteContext = (wglDeleteContext_t)
          GetProcAddress(opengl_lib, "wglDeleteContext");
       if (!pfnwglDeleteContext) {
          _debug_printf("wgl: failed to get wglDeleteContext()\n");
          return NULL;
       }
    } else {
       /* Used as opengl32.dll drop-in alternative. */
       assert(g_pfnwglCreateContext != NULL);
       assert(g_pfnwglDeleteContext != NULL);
       pfnwglCreateContext = g_pfnwglCreateContext;
       pfnwglDeleteContext = g_pfnwglDeleteContext;
    }

    /* Call wglCreateContext to get a valid context ID */
    context = pfnwglCreateContext(hDC);

    if (context) {
       /* Now replace the context we just created with a new one that reflects
        * the attributes passed to this function.
        */
       DHGLRC dhglrc, c, share_dhglrc = 0;

       /* Convert public HGLRC to driver DHGLRC */
       if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
          dhglrc = stw_dev->callbacks.pfnGetDhglrc(context);
          if (hShareContext)
             share_dhglrc = stw_dev->callbacks.pfnGetDhglrc(hShareContext);
       }
       else {
          /* not using ICD */
          dhglrc = (DHGLRC)(INT_PTR)context;
          share_dhglrc = (DHGLRC)(INT_PTR)hShareContext;
       }

       struct stw_context *share_stw = stw_lookup_context(share_dhglrc);

       const struct stw_pixelformat_info *pfi = stw_pixelformat_get_info_from_hdc(hDC);
       if (!pfi)
          return 0;

       struct stw_context *stw_ctx = stw_create_context_attribs(hDC, layerPlane, share_stw,
                                                                stw_dev->fscreen,
                                                                majorVersion, minorVersion,
                                                                contextFlags, profileMask, pfi,
                                                                resetStrategy);

       if (!stw_ctx) {
          pfnwglDeleteContext(context);
          return NULL;
       }

       c = stw_create_context_handle(stw_ctx, dhglrc);
       if (!c) {
          stw_destroy_context(stw_ctx);
          pfnwglDeleteContext(context);
          context = NULL;
       }
    }

    return context;
 }


 /** Defined by WGL_ARB_make_current_read */
 BOOL APIENTRY
 wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
 {
    DHGLRC dhglrc = 0;

    if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
       /* Convert HGLRC to DHGLRC */
       dhglrc = stw_dev->callbacks.pfnGetDhglrc(hglrc);
    } else {
       /* not using ICD */
       dhglrc = (DHGLRC)(INT_PTR)hglrc;
    }

    return stw_make_current_by_handles(hDrawDC, hReadDC, dhglrc);
 }

 HDC APIENTRY
 wglGetCurrentReadDCARB(VOID)
 {
    return stw_get_current_read_dc();
 }
	/*
	* Mesa 3-D graphics library
	*
	* Copyright (C) 2011 Morgan Armand <morgan.devel@gmail.com>
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included
	* in all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*/

	#include <stdio.h>
	#include <windows.h>

	#define WGL_WGLEXT_PROTOTYPES

	#include <GL/gl.h>
	#include <GL/wglext.h>

	#include "gldrv.h"
	#include "stw_context.h"
	#include "stw_device.h"
	#include "stw_ext_context.h"

	#include "util/u_debug.h"


	static wglCreateContext_t g_pfnwglCreateContext = NULL;
	static wglDeleteContext_t g_pfnwglDeleteContext = NULL;

	/* When this library is used as a opengl32.dll drop-in replacement, ensure we
	* use the wglCreate/Destroy entrypoints above, and not the true opengl32.dll,
	* which could happen if this library's name is not opengl32.dll exactly.
	*
	* For example, Qt 5.4 bundles this as opengl32sw.dll:
	* https://blog.qt.io/blog/2014/11/27/qt-weekly-21-dynamic-opengl-implementation-loading-in-qt-5-4/
	*/
	void
	stw_override_opengl32_entry_points(wglCreateContext_t create, wglDeleteContext_t delete)
	{
	g_pfnwglCreateContext = create;
	g_pfnwglDeleteContext = delete;
	}


	/**
	* The implementation of this function is tricky. The OPENGL32.DLL library
	* remaps the context IDs returned by our stw_create_context_attribs()
	* function to different values returned to the caller of wglCreateContext().
	* That is, DHGLRC (driver) handles are not equivalent to HGLRC (public)
	* handles.
	*
	* So we need to generate a new HGLRC ID here. We do that by calling
	* the regular wglCreateContext() function. Then, we replace the newly-
	* created stw_context with a new stw_context that reflects the arguments
	* to this function.
	*/
	HGLRC WINAPI
	wglCreateContextAttribsARB(HDC hDC, HGLRC hShareContext, const int *attribList)
	{
	HGLRC context;

	int majorVersion = 1, minorVersion = 0, layerPlane = 0;
	int contextFlags = 0x0;
	int profileMask = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
	int resetStrategy = WGL_NO_RESET_NOTIFICATION_ARB;
	int i;
	BOOL done = FALSE;
	const int contextFlagsAll = (WGL_CONTEXT_DEBUG_BIT_ARB \|
	WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB \|
	WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB);

	if (!stw_dev)
	return NULL;

	/* parse attrib_list */
	if (attribList) {
	for (i = 0; !done && attribList[i]; i++) {
	switch (attribList[i]) {
	case WGL_CONTEXT_MAJOR_VERSION_ARB:
	majorVersion = attribList[++i];
	break;
	case WGL_CONTEXT_MINOR_VERSION_ARB:
	minorVersion = attribList[++i];
	break;
	case WGL_CONTEXT_LAYER_PLANE_ARB:
	layerPlane = attribList[++i];
	break;
	case WGL_CONTEXT_FLAGS_ARB:
	contextFlags = attribList[++i];
	break;
	case WGL_CONTEXT_PROFILE_MASK_ARB:
	profileMask = attribList[++i];
	break;
	case WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB:
	resetStrategy = attribList[++i];
	break;
	case 0:
	/* end of list */
	done = TRUE;
	break;
	default:
	/* bad attribute */
	SetLastError(ERROR_INVALID_PARAMETER);
	return 0;
	}
	}
	}

	/* check contextFlags */
	if (contextFlags & ~contextFlagsAll) {
	SetLastError(ERROR_INVALID_PARAMETER);
	return NULL;
	}

	/* check profileMask */
	if (profileMask != WGL_CONTEXT_CORE_PROFILE_BIT_ARB &&
	profileMask != WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB &&
	profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT) {
	SetLastError(ERROR_INVALID_PROFILE_ARB);
	return NULL;
	}

	/* check version (generate ERROR_INVALID_VERSION_ARB if bad) */
	if (majorVersion <= 0 \|\|
	minorVersion < 0 \|\|
	(profileMask != WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
	((majorVersion == 1 && minorVersion > 5) \|\|
	(majorVersion == 2 && minorVersion > 1) \|\|
	(majorVersion == 3 && minorVersion > 3) \|\|
	(majorVersion == 4 && minorVersion > 6) \|\|
	majorVersion > 4)) \|\|
	(profileMask == WGL_CONTEXT_ES_PROFILE_BIT_EXT &&
	((majorVersion == 1 && minorVersion > 1) \|\|
	(majorVersion == 2 && minorVersion > 0) \|\|
	(majorVersion == 3 && minorVersion > 1) \|\|
	majorVersion > 3))) {
	SetLastError(ERROR_INVALID_VERSION_ARB);
	return NULL;
	}

	if ((contextFlags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) &&
	majorVersion < 3) {
	SetLastError(ERROR_INVALID_VERSION_ARB);
	return 0;
	}

	if (resetStrategy != WGL_NO_RESET_NOTIFICATION_ARB &&
	resetStrategy != WGL_LOSE_CONTEXT_ON_RESET_ARB) {
	SetLastError(ERROR_INVALID_PARAMETER);
	return NULL;
	}

	wglCreateContext_t pfnwglCreateContext;
	wglDeleteContext_t pfnwglDeleteContext;

	if (stw_dev->callbacks.pfnGetDhglrc) {
	/* Used as an ICD.
	*
	* Get pointers to OPENGL32.DLL's wglCreate/DeleteContext() functions
	*/
	HMODULE opengl_lib = GetModuleHandleA("opengl32.dll");
	if (!opengl_lib) {
	_debug_printf("wgl: GetModuleHandleA(\"opengl32.dll\") failed\n");
	return NULL;
	}

	pfnwglCreateContext = (wglCreateContext_t)
	GetProcAddress(opengl_lib, "wglCreateContext");
	if (!pfnwglCreateContext) {
	_debug_printf("wgl: failed to get wglCreateContext()\n");
	return NULL;
	}

	pfnwglDeleteContext = (wglDeleteContext_t)
	GetProcAddress(opengl_lib, "wglDeleteContext");
	if (!pfnwglDeleteContext) {
	_debug_printf("wgl: failed to get wglDeleteContext()\n");
	return NULL;
	}
	} else {
	/* Used as opengl32.dll drop-in alternative. */
	assert(g_pfnwglCreateContext != NULL);
	assert(g_pfnwglDeleteContext != NULL);
	pfnwglCreateContext = g_pfnwglCreateContext;
	pfnwglDeleteContext = g_pfnwglDeleteContext;
	}

	/* Call wglCreateContext to get a valid context ID */
	context = pfnwglCreateContext(hDC);

	if (context) {
	/* Now replace the context we just created with a new one that reflects
	* the attributes passed to this function.
	*/
	DHGLRC dhglrc, c, share_dhglrc = 0;

	/* Convert public HGLRC to driver DHGLRC */
	if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
	dhglrc = stw_dev->callbacks.pfnGetDhglrc(context);
	if (hShareContext)
	share_dhglrc = stw_dev->callbacks.pfnGetDhglrc(hShareContext);
	}
	else {
	/* not using ICD */
	dhglrc = (DHGLRC)(INT_PTR)context;
	share_dhglrc = (DHGLRC)(INT_PTR)hShareContext;
	}

	struct stw_context *share_stw = stw_lookup_context(share_dhglrc);

	const struct stw_pixelformat_info *pfi = stw_pixelformat_get_info_from_hdc(hDC);
	if (!pfi)
	return 0;

	struct stw_context *stw_ctx = stw_create_context_attribs(hDC, layerPlane, share_stw,
	stw_dev->fscreen,
	majorVersion, minorVersion,
	contextFlags, profileMask, pfi,
	resetStrategy);

	if (!stw_ctx) {
	pfnwglDeleteContext(context);
	return NULL;
	}

	c = stw_create_context_handle(stw_ctx, dhglrc);
	if (!c) {
	stw_destroy_context(stw_ctx);
	pfnwglDeleteContext(context);
	context = NULL;
	}
	}

	return context;
	}


	/** Defined by WGL_ARB_make_current_read */
	BOOL APIENTRY
	wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
	{
	DHGLRC dhglrc = 0;

	if (stw_dev && stw_dev->callbacks.pfnGetDhglrc) {
	/* Convert HGLRC to DHGLRC */
	dhglrc = stw_dev->callbacks.pfnGetDhglrc(hglrc);
	} else {
	/* not using ICD */
	dhglrc = (DHGLRC)(INT_PTR)hglrc;
	}

	return stw_make_current_by_handles(hDrawDC, hReadDC, dhglrc);
	}

	HDC APIENTRY
	wglGetCurrentReadDCARB(VOID)
	{
	return stw_get_current_read_dc();
	}