mesa: remove Driver.ResizeBuffers
[mesa.git] / src / mesa / drivers / dri / common / dri_util.c
index 1023394ef587913250ed4f1691c6786d879c2a15..5cfa2f8ca4f1a7e78c9459ac19ccf3df9c5c5113 100644 (file)
@@ -1,3 +1,27 @@
+/*
+ * (C) Copyright IBM Corporation 2002, 2004
+ * All Rights Reserved.
+ *
+ * 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
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, 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 (including the next
+ * paragraph) 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 NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS AND/OR THEIR SUPPLIERS 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.
+ */
+
 /**
  * \file dri_util.c
  * DRI utility functions.
  */
 
 
-#include <xf86drm.h>
+#include <stdbool.h>
 #include "dri_util.h"
 #include "utils.h"
 #include "xmlpool.h"
-#include "../glsl/glsl_parser_extras.h"
+#include "main/mtypes.h"
+#include "main/framebuffer.h"
+#include "main/version.h"
+#include "main/errors.h"
+#include "main/macros.h"
 
-PUBLIC const char __dri2ConfigOptions[] =
+const char __dri2ConfigOptions[] =
    DRI_CONF_BEGIN
       DRI_CONF_SECTION_PERFORMANCE
          DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_1)
       DRI_CONF_SECTION_END
    DRI_CONF_END;
 
-static const uint __dri2NConfigOptions = 1;
-
-static void dri_get_drawable(__DRIdrawable *pdp);
-static void dri_put_drawable(__DRIdrawable *pdp);
-
 /*****************************************************************/
 /** \name Screen handling functions                              */
 /*****************************************************************/
@@ -51,53 +74,142 @@ setupLoaderExtensions(__DRIscreen *psp,
            psp->dri2.image = (__DRIimageLookupExtension *) extensions[i];
        if (strcmp(extensions[i]->name, __DRI_USE_INVALIDATE) == 0)
            psp->dri2.useInvalidate = (__DRIuseInvalidateExtension *) extensions[i];
+       if (strcmp(extensions[i]->name, __DRI_SWRAST_LOADER) == 0)
+           psp->swrast_loader = (__DRIswrastLoaderExtension *) extensions[i];
+        if (strcmp(extensions[i]->name, __DRI_IMAGE_LOADER) == 0)
+           psp->image.loader = (__DRIimageLoaderExtension *) extensions[i];
     }
 }
 
+/**
+ * This pointer determines which driver API we'll use in the case of the
+ * loader not passing us an explicit driver extensions list (that would,
+ * itself, contain a pointer to a driver API.)
+ *
+ * A driver's driDriverGetExtensions_drivername() can update this pointer to
+ * what it's returning, and a loader that is ignorant of createNewScreen2()
+ * will get the correct driver screen created, as long as no other
+ * driDriverGetExtensions() happened in between the first one and the
+ * createNewScreen().
+ *
+ * This allows the X Server to not require the significant dri_interface.h
+ * updates for doing createNewScreen2(), which would discourage backporting of
+ * the X Server patches to support the new loader interface.
+ */
+const struct __DriverAPIRec *globalDriverAPI = &driDriverAPI;
+
+/**
+ * This is the first entrypoint in the driver called by the DRI driver loader
+ * after dlopen()ing it.
+ *
+ * It's used to create global state for the driver across contexts on the same
+ * Display.
+ */
 static __DRIscreen *
-dri2CreateNewScreen(int scrn, int fd,
-                   const __DRIextension **extensions,
-                   const __DRIconfig ***driver_configs, void *data)
+driCreateNewScreen2(int scrn, int fd,
+                    const __DRIextension **extensions,
+                    const __DRIextension **driver_extensions,
+                    const __DRIconfig ***driver_configs, void *data)
 {
     static const __DRIextension *emptyExtensionList[] = { NULL };
     __DRIscreen *psp;
-    drmVersionPtr version;
 
     psp = calloc(1, sizeof(*psp));
     if (!psp)
        return NULL;
 
-    setupLoaderExtensions(psp, extensions);
+    /* By default, use the global driDriverAPI symbol (non-megadrivers). */
+    psp->driver = globalDriverAPI;
 
-    version = drmGetVersion(fd);
-    if (version) {
-       psp->drm_version.major = version->version_major;
-       psp->drm_version.minor = version->version_minor;
-       psp->drm_version.patch = version->version_patchlevel;
-       drmFreeVersion(version);
+    /* If the driver exposes its vtable through its extensions list
+     * (megadrivers), use that instead.
+     */
+    if (driver_extensions) {
+       for (int i = 0; driver_extensions[i]; i++) {
+          if (strcmp(driver_extensions[i]->name, __DRI_DRIVER_VTABLE) == 0) {
+             psp->driver =
+                ((__DRIDriverVtableExtension *)driver_extensions[i])->vtable;
+          }
+       }
     }
 
+    setupLoaderExtensions(psp, extensions);
+
+    psp->loaderPrivate = data;
+
     psp->extensions = emptyExtensionList;
     psp->fd = fd;
     psp->myNum = scrn;
 
-    psp->api_mask = (1 << __DRI_API_OPENGL);
-    *driver_configs = driDriverAPI.InitScreen(psp);
+    *driver_configs = psp->driver->InitScreen(psp);
     if (*driver_configs == NULL) {
        free(psp);
        return NULL;
     }
 
-    psp->loaderPrivate = data;
+    struct gl_constants consts = { 0 };
+    gl_api api;
+    unsigned version;
+
+    api = API_OPENGLES2;
+    if (_mesa_override_gl_version_contextless(&consts, &api, &version))
+       psp->max_gl_es2_version = version;
+
+    api = API_OPENGL_COMPAT;
+    if (_mesa_override_gl_version_contextless(&consts, &api, &version)) {
+       if (api == API_OPENGL_CORE) {
+          psp->max_gl_core_version = version;
+       } else {
+          psp->max_gl_compat_version = version;
+       }
+    }
+
+    psp->api_mask = 0;
+    if (psp->max_gl_compat_version > 0)
+       psp->api_mask |= (1 << __DRI_API_OPENGL);
+    if (psp->max_gl_core_version > 0)
+       psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
+    if (psp->max_gl_es1_version > 0)
+       psp->api_mask |= (1 << __DRI_API_GLES);
+    if (psp->max_gl_es2_version > 0)
+       psp->api_mask |= (1 << __DRI_API_GLES2);
+    if (psp->max_gl_es2_version >= 30)
+       psp->api_mask |= (1 << __DRI_API_GLES3);
+
+    driParseOptionInfo(&psp->optionInfo, __dri2ConfigOptions);
+    driParseConfigFiles(&psp->optionCache, &psp->optionInfo, psp->myNum, "dri2");
 
-    driParseOptionInfo(&psp->optionInfo, __dri2ConfigOptions,
-                      __dri2NConfigOptions);
-    driParseConfigFiles(&psp->optionCache, &psp->optionInfo, psp->myNum,
-                       "dri2");
 
     return psp;
 }
 
+static __DRIscreen *
+dri2CreateNewScreen(int scrn, int fd,
+                   const __DRIextension **extensions,
+                   const __DRIconfig ***driver_configs, void *data)
+{
+   return driCreateNewScreen2(scrn, fd, extensions, NULL,
+                               driver_configs, data);
+}
+
+/** swrast driver createNewScreen entrypoint. */
+static __DRIscreen *
+driSWRastCreateNewScreen(int scrn, const __DRIextension **extensions,
+                         const __DRIconfig ***driver_configs, void *data)
+{
+   return driCreateNewScreen2(scrn, -1, extensions, NULL,
+                               driver_configs, data);
+}
+
+static __DRIscreen *
+driSWRastCreateNewScreen2(int scrn, const __DRIextension **extensions,
+                          const __DRIextension **driver_extensions,
+                          const __DRIconfig ***driver_configs, void *data)
+{
+   return driCreateNewScreen2(scrn, -1, extensions, driver_extensions,
+                               driver_configs, data);
+}
+
 /**
  * Destroy the per-screen private information.
  * 
@@ -113,10 +225,7 @@ static void driDestroyScreen(__DRIscreen *psp)
         * stream open to the X-server anymore.
         */
 
-       _mesa_destroy_shader_compiler();
-
-       if (driDriverAPI.DestroyScreen)
-           driDriverAPI.DestroyScreen(psp);
+       psp->driver->DestroyScreen(psp);
 
        driDestroyOptionCache(&psp->optionCache);
        driDestroyOptionInfo(&psp->optionInfo);
@@ -133,62 +242,226 @@ static const __DRIextension **driGetExtensions(__DRIscreen *psp)
 /*@}*/
 
 
+static bool
+validate_context_version(__DRIscreen *screen,
+                         int mesa_api,
+                         unsigned major_version,
+                         unsigned minor_version,
+                         unsigned *dri_ctx_error)
+{
+   unsigned req_version = 10 * major_version + minor_version;
+   unsigned max_version = 0;
+
+   switch (mesa_api) {
+   case API_OPENGL_COMPAT:
+      max_version = screen->max_gl_compat_version;
+      break;
+   case API_OPENGL_CORE:
+      max_version = screen->max_gl_core_version;
+      break;
+   case API_OPENGLES:
+      max_version = screen->max_gl_es1_version;
+      break;
+   case API_OPENGLES2:
+      max_version = screen->max_gl_es2_version;
+      break;
+   default:
+      max_version = 0;
+      break;
+   }
+
+   if (max_version == 0) {
+      *dri_ctx_error = __DRI_CTX_ERROR_BAD_API;
+      return false;
+   } else if (req_version > max_version) {
+      *dri_ctx_error = __DRI_CTX_ERROR_BAD_VERSION;
+      return false;
+   }
+
+   return true;
+}
+
 /*****************************************************************/
 /** \name Context handling functions                             */
 /*****************************************************************/
 /*@{*/
 
 static __DRIcontext *
-dri2CreateNewContextForAPI(__DRIscreen *screen, int api,
-                          const __DRIconfig *config,
-                          __DRIcontext *shared, void *data)
+driCreateContextAttribs(__DRIscreen *screen, int api,
+                        const __DRIconfig *config,
+                        __DRIcontext *shared,
+                        unsigned num_attribs,
+                        const uint32_t *attribs,
+                        unsigned *error,
+                        void *data)
 {
     __DRIcontext *context;
     const struct gl_config *modes = (config != NULL) ? &config->modes : NULL;
     void *shareCtx = (shared != NULL) ? shared->driverPrivate : NULL;
     gl_api mesa_api;
+    unsigned major_version = 1;
+    unsigned minor_version = 0;
+    uint32_t flags = 0;
+    bool notify_reset = false;
 
-    if (!(screen->api_mask & (1 << api)))
+    assert((num_attribs == 0) || (attribs != NULL));
+
+    if (!(screen->api_mask & (1 << api))) {
+       *error = __DRI_CTX_ERROR_BAD_API;
        return NULL;
+    }
 
     switch (api) {
     case __DRI_API_OPENGL:
-           mesa_api = API_OPENGL;
-           break;
+       mesa_api = API_OPENGL_COMPAT;
+       break;
     case __DRI_API_GLES:
-           mesa_api = API_OPENGLES;
-           break;
+       mesa_api = API_OPENGLES;
+       break;
     case __DRI_API_GLES2:
-           mesa_api = API_OPENGLES2;
-           break;
+    case __DRI_API_GLES3:
+       mesa_api = API_OPENGLES2;
+       break;
+    case __DRI_API_OPENGL_CORE:
+        mesa_api = API_OPENGL_CORE;
+        break;
     default:
+       *error = __DRI_CTX_ERROR_BAD_API;
+       return NULL;
+    }
+
+    for (unsigned i = 0; i < num_attribs; i++) {
+       switch (attribs[i * 2]) {
+       case __DRI_CTX_ATTRIB_MAJOR_VERSION:
+           major_version = attribs[i * 2 + 1];
+           break;
+       case __DRI_CTX_ATTRIB_MINOR_VERSION:
+           minor_version = attribs[i * 2 + 1];
+           break;
+       case __DRI_CTX_ATTRIB_FLAGS:
+           flags = attribs[i * 2 + 1];
+           break;
+        case __DRI_CTX_ATTRIB_RESET_STRATEGY:
+            notify_reset = (attribs[i * 2 + 1]
+                            != __DRI_CTX_RESET_NO_NOTIFICATION);
+            break;
+       default:
+           /* We can't create a context that satisfies the requirements of an
+            * attribute that we don't understand.  Return failure.
+            */
+           assert(!"Should not get here.");
+           *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
            return NULL;
+       }
     }
 
-    context = malloc(sizeof *context);
-    if (!context)
+    /* Mesa does not support the GL_ARB_compatibilty extension or the
+     * compatibility profile.  This means that we treat a API_OPENGL_COMPAT 3.1 as
+     * API_OPENGL_CORE and reject API_OPENGL_COMPAT 3.2+.
+     */
+    if (mesa_api == API_OPENGL_COMPAT && major_version == 3 && minor_version == 1)
+       mesa_api = API_OPENGL_CORE;
+
+    if (mesa_api == API_OPENGL_COMPAT
+        && ((major_version > 3)
+            || (major_version == 3 && minor_version >= 2))) {
+       *error = __DRI_CTX_ERROR_BAD_API;
+       return NULL;
+    }
+
+    /* The latest version of EGL_KHR_create_context spec says:
+     *
+     *     "If the EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR flag bit is set in
+     *     EGL_CONTEXT_FLAGS_KHR, then a <debug context> will be created.
+     *     [...] This bit is supported for OpenGL and OpenGL ES contexts.
+     *
+     * None of the other flags have any meaning in an ES context, so this seems safe.
+     */
+    if (mesa_api != API_OPENGL_COMPAT
+        && mesa_api != API_OPENGL_CORE
+        && (flags & ~__DRI_CTX_FLAG_DEBUG)) {
+       *error = __DRI_CTX_ERROR_BAD_FLAG;
        return NULL;
+    }
+
+    /* There are no forward-compatible contexts before OpenGL 3.0.  The
+     * GLX_ARB_create_context spec says:
+     *
+     *     "Forward-compatible contexts are defined only for OpenGL versions
+     *     3.0 and later."
+     *
+     * Forward-looking contexts are supported by silently converting the
+     * requested API to API_OPENGL_CORE.
+     *
+     * In Mesa, a debug context is the same as a regular context.
+     */
+    if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
+       mesa_api = API_OPENGL_CORE;
+    }
+
+    const uint32_t allowed_flags = (__DRI_CTX_FLAG_DEBUG
+                                    | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
+                                    | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS);
+    if (flags & ~allowed_flags) {
+       *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
+       return NULL;
+    }
+
+    if (!validate_context_version(screen, mesa_api,
+                                  major_version, minor_version, error))
+       return NULL;
+
+    context = calloc(1, sizeof *context);
+    if (!context) {
+       *error = __DRI_CTX_ERROR_NO_MEMORY;
+       return NULL;
+    }
+
+    context->loaderPrivate = data;
 
     context->driScreenPriv = screen;
     context->driDrawablePriv = NULL;
-    context->loaderPrivate = data;
+    context->driReadablePriv = NULL;
 
-    if (!driDriverAPI.CreateContext(mesa_api, modes,
-                                   context, shareCtx) ) {
+    if (!screen->driver->CreateContext(mesa_api, modes, context,
+                                       major_version, minor_version,
+                                       flags, notify_reset, error, shareCtx)) {
         free(context);
         return NULL;
     }
 
+    *error = __DRI_CTX_ERROR_SUCCESS;
     return context;
 }
 
+void
+driContextSetFlags(struct gl_context *ctx, uint32_t flags)
+{
+    if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
+        ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
+    if ((flags & __DRI_CTX_FLAG_DEBUG) != 0) {
+       _mesa_set_debug_state_int(ctx, GL_DEBUG_OUTPUT, GL_TRUE);
+        ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
+    }
+}
+
+static __DRIcontext *
+driCreateNewContextForAPI(__DRIscreen *screen, int api,
+                          const __DRIconfig *config,
+                          __DRIcontext *shared, void *data)
+{
+    unsigned error;
+
+    return driCreateContextAttribs(screen, api, config, shared, 0, NULL,
+                                   &error, data);
+}
 
 static __DRIcontext *
-dri2CreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
-                     __DRIcontext *shared, void *data)
+driCreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
+                    __DRIcontext *shared, void *data)
 {
-   return dri2CreateNewContextForAPI(screen, __DRI_API_OPENGL,
-                                    config, shared, data);
+    return driCreateNewContextForAPI(screen, __DRI_API_OPENGL,
+                                     config, shared, data);
 }
 
 /**
@@ -202,7 +475,7 @@ static void
 driDestroyContext(__DRIcontext *pcp)
 {
     if (pcp) {
-       driDriverAPI.DestroyContext(pcp);
+       pcp->driScreenPriv->driver->DestroyContext(pcp);
        free(pcp);
     }
 }
@@ -224,6 +497,40 @@ driCopyContext(__DRIcontext *dest, __DRIcontext *src, unsigned long mask)
 /*****************************************************************/
 /*@{*/
 
+static void dri_get_drawable(__DRIdrawable *pdp);
+static void dri_put_drawable(__DRIdrawable *pdp);
+
+/**
+ * This function takes both a read buffer and a draw buffer.  This is needed
+ * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
+ * function.
+ */
+static int driBindContext(__DRIcontext *pcp,
+                         __DRIdrawable *pdp,
+                         __DRIdrawable *prp)
+{
+    /*
+    ** Assume error checking is done properly in glXMakeCurrent before
+    ** calling driUnbindContext.
+    */
+
+    if (!pcp)
+       return GL_FALSE;
+
+    /* Bind the drawable to the context */
+    pcp->driDrawablePriv = pdp;
+    pcp->driReadablePriv = prp;
+    if (pdp) {
+       pdp->driContextPriv = pcp;
+       dri_get_drawable(pdp);
+    }
+    if (prp && pdp != prp) {
+       dri_get_drawable(prp);
+    }
+
+    return pcp->driScreenPriv->driver->MakeCurrent(pcp, pdp, prp);
+}
+
 /**
  * Unbind context.
  * 
@@ -251,16 +558,20 @@ static int driUnbindContext(__DRIcontext *pcp)
     */
 
     if (pcp == NULL)
-        return GL_FALSE;
+       return GL_FALSE;
+
+    /*
+    ** Call driUnbindContext before checking for valid drawables
+    ** to handle surfaceless contexts properly.
+    */
+    pcp->driScreenPriv->driver->UnbindContext(pcp);
 
     pdp = pcp->driDrawablePriv;
     prp = pcp->driReadablePriv;
 
     /* already unbound */
     if (!pdp && !prp)
-      return GL_TRUE;
-    /* Let driver unbind drawable from context */
-    driDriverAPI.UnbindContext(pcp);
+       return GL_TRUE;
 
     assert(pdp);
     if (pdp->refcount == 0) {
@@ -271,60 +582,44 @@ static int driUnbindContext(__DRIcontext *pcp)
     dri_put_drawable(pdp);
 
     if (prp != pdp) {
-        if (prp->refcount == 0) {
+       if (prp->refcount == 0) {
            /* ERROR!!! */
            return GL_FALSE;
        }
 
-       dri_put_drawable(prp);
+       dri_put_drawable(prp);
     }
 
-
-    /* XXX this is disabled so that if we call SwapBuffers on an unbound
-     * window we can determine the last context bound to the window and
-     * use that context's lock. (BrianP, 2-Dec-2000)
-     */
-    pcp->driDrawablePriv = pcp->driReadablePriv = NULL;
+    pcp->driDrawablePriv = NULL;
+    pcp->driReadablePriv = NULL;
 
     return GL_TRUE;
 }
 
-/**
- * This function takes both a read buffer and a draw buffer.  This is needed
- * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
- * function.
- */
-static int driBindContext(__DRIcontext *pcp,
-                         __DRIdrawable *pdp,
-                         __DRIdrawable *prp)
-{
-    /*
-    ** Assume error checking is done properly in glXMakeCurrent before
-    ** calling driUnbindContext.
-    */
+/*@}*/
 
-    if (!pcp)
-       return GL_FALSE;
 
-    /* Bind the drawable to the context */
-    pcp->driDrawablePriv = pdp;
-    pcp->driReadablePriv = prp;
+static void dri_get_drawable(__DRIdrawable *pdp)
+{
+    pdp->refcount++;
+}
+
+static void dri_put_drawable(__DRIdrawable *pdp)
+{
     if (pdp) {
-       pdp->driContextPriv = pcp;
-       dri_get_drawable(pdp);
-    }
-    if (prp && pdp != prp) {
-       dri_get_drawable(prp);
-    }
+       pdp->refcount--;
+       if (pdp->refcount)
+           return;
 
-    /* Call device-specific MakeCurrent */
-    return driDriverAPI.MakeCurrent(pcp, pdp, prp);
+       pdp->driScreenPriv->driver->DestroyBuffer(pdp);
+       free(pdp);
+    }
 }
 
 static __DRIdrawable *
-dri2CreateNewDrawable(__DRIscreen *screen,
-                     const __DRIconfig *config,
-                     void *loaderPrivate)
+driCreateNewDrawable(__DRIscreen *screen,
+                     const __DRIconfig *config,
+                     void *data)
 {
     __DRIdrawable *pdraw;
 
@@ -332,15 +627,19 @@ dri2CreateNewDrawable(__DRIscreen *screen,
     if (!pdraw)
        return NULL;
 
+    pdraw->loaderPrivate = data;
+
+    pdraw->driScreenPriv = screen;
     pdraw->driContextPriv = NULL;
-    pdraw->loaderPrivate = loaderPrivate;
-    pdraw->refcount = 1;
+    pdraw->refcount = 0;
     pdraw->lastStamp = 0;
     pdraw->w = 0;
     pdraw->h = 0;
-    pdraw->driScreenPriv = screen;
 
-    if (!driDriverAPI.CreateBuffer(screen, pdraw, &config->modes, 0)) {
+    dri_get_drawable(pdraw);
+
+    if (!screen->driver->CreateBuffer(screen, pdraw, &config->modes,
+                                      GL_FALSE)) {
        free(pdraw);
        return NULL;
     }
@@ -350,24 +649,30 @@ dri2CreateNewDrawable(__DRIscreen *screen,
     return pdraw;
 }
 
+static void
+driDestroyDrawable(__DRIdrawable *pdp)
+{
+    dri_put_drawable(pdp);
+}
+
 static __DRIbuffer *
 dri2AllocateBuffer(__DRIscreen *screen,
                   unsigned int attachment, unsigned int format,
                   int width, int height)
 {
-    return driDriverAPI.AllocateBuffer(screen, attachment, format,
-                                      width, height);
+    return screen->driver->AllocateBuffer(screen, attachment, format,
+                                          width, height);
 }
 
 static void
 dri2ReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 {
-   driDriverAPI.ReleaseBuffer(screen, buffer);
+    screen->driver->ReleaseBuffer(screen, buffer);
 }
 
 
 static int
-dri2ConfigQueryb(__DRIscreen *screen, const char *var, GLboolean *val)
+dri2ConfigQueryb(__DRIscreen *screen, const char *var, unsigned char *val)
 {
    if (!driCheckOption(&screen->optionCache, var, DRI_BOOL))
       return -1;
@@ -378,7 +683,7 @@ dri2ConfigQueryb(__DRIscreen *screen, const char *var, GLboolean *val)
 }
 
 static int
-dri2ConfigQueryi(__DRIscreen *screen, const char *var, GLint *val)
+dri2ConfigQueryi(__DRIscreen *screen, const char *var, int *val)
 {
    if (!driCheckOption(&screen->optionCache, var, DRI_INT) &&
        !driCheckOption(&screen->optionCache, var, DRI_ENUM))
@@ -390,7 +695,7 @@ dri2ConfigQueryi(__DRIscreen *screen, const char *var, GLint *val)
 }
 
 static int
-dri2ConfigQueryf(__DRIscreen *screen, const char *var, GLfloat *val)
+dri2ConfigQueryf(__DRIscreen *screen, const char *var, float *val)
 {
    if (!driCheckOption(&screen->optionCache, var, DRI_FLOAT))
       return -1;
@@ -400,77 +705,76 @@ dri2ConfigQueryf(__DRIscreen *screen, const char *var, GLfloat *val)
     return 0;
 }
 
-
-static void dri_get_drawable(__DRIdrawable *pdp)
-{
-    pdp->refcount++;
-}
-       
-static void dri_put_drawable(__DRIdrawable *pdp)
+static unsigned int
+driGetAPIMask(__DRIscreen *screen)
 {
-    __DRIscreen *psp;
-
-    if (pdp) {
-       pdp->refcount--;
-       if (pdp->refcount)
-           return;
-
-       psp = pdp->driScreenPriv;
-        driDriverAPI.DestroyBuffer(pdp);
-       free(pdp);
-    }
+    return screen->api_mask;
 }
 
+/**
+ * swrast swapbuffers entrypoint.
+ *
+ * DRI2 implements this inside the loader with only flushes handled by the
+ * driver.
+ */
 static void
-driDestroyDrawable(__DRIdrawable *pdp)
+driSwapBuffers(__DRIdrawable *pdp)
 {
-    dri_put_drawable(pdp);
-}
-
-/*@}*/
+    assert(pdp->driScreenPriv->swrast_loader);
 
-static unsigned int
-dri2GetAPIMask(__DRIscreen *screen)
-{
-    return screen->api_mask;
+    pdp->driScreenPriv->driver->SwapBuffers(pdp);
 }
 
-
 /** Core interface */
 const __DRIcoreExtension driCoreExtension = {
-    { __DRI_CORE, __DRI_CORE_VERSION },
-    NULL,
-    driDestroyScreen,
-    driGetExtensions,
-    driGetConfigAttrib,
-    driIndexConfigAttrib,
-    NULL,
-    driDestroyDrawable,
-    NULL,
-    NULL,
-    driCopyContext,
-    driDestroyContext,
-    driBindContext,
-    driUnbindContext
+    .base = { __DRI_CORE, 1 },
+
+    .createNewScreen            = NULL,
+    .destroyScreen              = driDestroyScreen,
+    .getExtensions              = driGetExtensions,
+    .getConfigAttrib            = driGetConfigAttrib,
+    .indexConfigAttrib          = driIndexConfigAttrib,
+    .createNewDrawable          = NULL,
+    .destroyDrawable            = driDestroyDrawable,
+    .swapBuffers                = driSwapBuffers, /* swrast */
+    .createNewContext           = driCreateNewContext, /* swrast */
+    .copyContext                = driCopyContext,
+    .destroyContext             = driDestroyContext,
+    .bindContext                = driBindContext,
+    .unbindContext              = driUnbindContext
 };
 
 /** DRI2 interface */
 const __DRIdri2Extension driDRI2Extension = {
-    { __DRI_DRI2, __DRI_DRI2_VERSION },
-    dri2CreateNewScreen,
-    dri2CreateNewDrawable,
-    dri2CreateNewContext,
-    dri2GetAPIMask,
-    dri2CreateNewContextForAPI,
-    dri2AllocateBuffer,
-    dri2ReleaseBuffer
+    .base = { __DRI_DRI2, 4 },
+
+    .createNewScreen            = dri2CreateNewScreen,
+    .createNewDrawable          = driCreateNewDrawable,
+    .createNewContext           = driCreateNewContext,
+    .getAPIMask                 = driGetAPIMask,
+    .createNewContextForAPI     = driCreateNewContextForAPI,
+    .allocateBuffer             = dri2AllocateBuffer,
+    .releaseBuffer              = dri2ReleaseBuffer,
+    .createContextAttribs       = driCreateContextAttribs,
+    .createNewScreen2           = driCreateNewScreen2,
+};
+
+const __DRIswrastExtension driSWRastExtension = {
+    .base = { __DRI_SWRAST, 4 },
+
+    .createNewScreen            = driSWRastCreateNewScreen,
+    .createNewDrawable          = driCreateNewDrawable,
+    .createNewContextForAPI     = driCreateNewContextForAPI,
+    .createContextAttribs       = driCreateContextAttribs,
+    .createNewScreen2           = driSWRastCreateNewScreen2,
 };
 
 const __DRI2configQueryExtension dri2ConfigQueryExtension = {
-   { __DRI2_CONFIG_QUERY, __DRI2_CONFIG_QUERY_VERSION },
-   dri2ConfigQueryb,
-   dri2ConfigQueryi,
-   dri2ConfigQueryf,
+   .base = { __DRI2_CONFIG_QUERY, 1 },
+
+   .configQueryb        = dri2ConfigQueryb,
+   .configQueryi        = dri2ConfigQueryi,
+   .configQueryf        = dri2ConfigQueryf,
 };
 
 void
@@ -490,10 +794,98 @@ driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv)
 {
    struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate;
    if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) {
-      ctx->Driver.ResizeBuffers(ctx, fb, dPriv->w, dPriv->h);
+      _mesa_resize_framebuffer(ctx, fb, dPriv->w, dPriv->h);
       /* if the driver needs the hw lock for ResizeBuffers, the drawable
          might have changed again by now */
       assert(fb->Width == dPriv->w);
       assert(fb->Height == dPriv->h);
    }
 }
+
+uint32_t
+driGLFormatToImageFormat(mesa_format format)
+{
+   switch (format) {
+   case MESA_FORMAT_B5G6R5_UNORM:
+      return __DRI_IMAGE_FORMAT_RGB565;
+   case MESA_FORMAT_B8G8R8X8_UNORM:
+      return __DRI_IMAGE_FORMAT_XRGB8888;
+   case MESA_FORMAT_B10G10R10A2_UNORM:
+      return __DRI_IMAGE_FORMAT_ARGB2101010;
+   case MESA_FORMAT_B10G10R10X2_UNORM:
+      return __DRI_IMAGE_FORMAT_XRGB2101010;
+   case MESA_FORMAT_B8G8R8A8_UNORM:
+      return __DRI_IMAGE_FORMAT_ARGB8888;
+   case MESA_FORMAT_R8G8B8A8_UNORM:
+      return __DRI_IMAGE_FORMAT_ABGR8888;
+   case MESA_FORMAT_R8G8B8X8_UNORM:
+      return __DRI_IMAGE_FORMAT_XBGR8888;
+   case MESA_FORMAT_R_UNORM8:
+      return __DRI_IMAGE_FORMAT_R8;
+   case MESA_FORMAT_R8G8_UNORM:
+      return __DRI_IMAGE_FORMAT_GR88;
+   case MESA_FORMAT_NONE:
+      return __DRI_IMAGE_FORMAT_NONE;
+   case MESA_FORMAT_B8G8R8A8_SRGB:
+      return __DRI_IMAGE_FORMAT_SARGB8;
+   default:
+      return 0;
+   }
+}
+
+mesa_format
+driImageFormatToGLFormat(uint32_t image_format)
+{
+   switch (image_format) {
+   case __DRI_IMAGE_FORMAT_RGB565:
+      return MESA_FORMAT_B5G6R5_UNORM;
+   case __DRI_IMAGE_FORMAT_XRGB8888:
+      return MESA_FORMAT_B8G8R8X8_UNORM;
+   case __DRI_IMAGE_FORMAT_ARGB2101010:
+      return MESA_FORMAT_B10G10R10A2_UNORM;
+   case __DRI_IMAGE_FORMAT_XRGB2101010:
+      return MESA_FORMAT_B10G10R10X2_UNORM;
+   case __DRI_IMAGE_FORMAT_ARGB8888:
+      return MESA_FORMAT_B8G8R8A8_UNORM;
+   case __DRI_IMAGE_FORMAT_ABGR8888:
+      return MESA_FORMAT_R8G8B8A8_UNORM;
+   case __DRI_IMAGE_FORMAT_XBGR8888:
+      return MESA_FORMAT_R8G8B8X8_UNORM;
+   case __DRI_IMAGE_FORMAT_R8:
+      return MESA_FORMAT_R_UNORM8;
+   case __DRI_IMAGE_FORMAT_GR88:
+      return MESA_FORMAT_R8G8_UNORM;
+   case __DRI_IMAGE_FORMAT_SARGB8:
+      return MESA_FORMAT_B8G8R8A8_SRGB;
+   case __DRI_IMAGE_FORMAT_NONE:
+      return MESA_FORMAT_NONE;
+   default:
+      return MESA_FORMAT_NONE;
+   }
+}
+
+/** Image driver interface */
+const __DRIimageDriverExtension driImageDriverExtension = {
+    .base = { __DRI_IMAGE_DRIVER, 1 },
+
+    .createNewScreen2           = driCreateNewScreen2,
+    .createNewDrawable          = driCreateNewDrawable,
+    .getAPIMask                 = driGetAPIMask,
+    .createContextAttribs       = driCreateContextAttribs,
+};
+
+/* swrast copy sub buffer entrypoint. */
+static void driCopySubBuffer(__DRIdrawable *pdp, int x, int y,
+                             int w, int h)
+{
+    assert(pdp->driScreenPriv->swrast_loader);
+
+    pdp->driScreenPriv->driver->CopySubBuffer(pdp, x, y, w, h);
+}
+
+/* for swrast only */
+const __DRIcopySubBufferExtension driCopySubBufferExtension = {
+   .base = { __DRI_COPY_SUB_BUFFER, 1 },
+
+   .copySubBuffer               = driCopySubBuffer,
+};