[PATCH v2 3/5] opengl32: Implement wow64 thunks for glMapBuffer (et al.).

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/opengl32/make_opengl   |  15 ++
 dlls/opengl32/unix_thunks.c | 252 ++++----------------------
 dlls/opengl32/unix_wgl.c    | 346 ++++++++++++++++++++++++++++++++++++
 dlls/opengl32/wgl.c         |  79 ++++++++
 4 files changed, 474 insertions(+), 218 deletions(-)

diff --git a/dlls/opengl32/make_opengl b/dlls/opengl32/make_opengl
index 7bfe0f219a2..43199f56981 100755
--- a/dlls/opengl32/make_opengl
+++ b/dlls/opengl32/make_opengl
@@ -189,11 +189,26 @@ my %manual_wow64_thunks =
      "glClientWaitSync" => 1,
      "glDeleteSync" => 1,
      "glFenceSync" => 1,
+     "glGetBufferPointerv" => 1,
+     "glGetBufferPointervARB" => 1,
+     "glGetNamedBufferPointerv" => 1,
+     "glGetNamedBufferPointervEXT" => 1,
      "glGetString" => 1,
      "glGetStringi" => 1,
      "glGetSynciv" => 1,
      "glIsSync" => 1,
+     "glMapBuffer" => 1,
+     "glMapBufferARB" => 1,
+     "glMapBufferRange" => 1,
+     "glMapNamedBuffer" => 1,
+     "glMapNamedBufferEXT" => 1,
+     "glMapNamedBufferRange" => 1,
+     "glMapNamedBufferRangeEXT" => 1,
      "glPathGlyphIndexRangeNV" => 1,
+     "glUnmapBuffer" => 1,
+     "glUnmapBufferARB" => 1,
+     "glUnmapNamedBuffer" => 1,
+     "glUnmapNamedBufferEXT" => 1,
      "glWaitSync" => 1,
      "wglCreateContext" => 1,
      "wglCreateContextAttribsARB" => 1,
diff --git a/dlls/opengl32/unix_thunks.c b/dlls/opengl32/unix_thunks.c
index ea8d7910450..1ba8fc3bf2f 100644
--- a/dlls/opengl32/unix_thunks.c
+++ b/dlls/opengl32/unix_thunks.c
@@ -7748,7 +7748,7 @@ static NTSTATUS ext_glGetBufferParameterui64vNV( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glGetBufferPointerv( void *args )
+NTSTATUS ext_glGetBufferPointerv( void *args )
 {
     struct glGetBufferPointerv_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -7756,7 +7756,7 @@ static NTSTATUS ext_glGetBufferPointerv( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glGetBufferPointervARB( void *args )
+NTSTATUS ext_glGetBufferPointervARB( void *args )
 {
     struct glGetBufferPointervARB_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -8796,7 +8796,7 @@ static NTSTATUS ext_glGetNamedBufferParameterui64vNV( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glGetNamedBufferPointerv( void *args )
+NTSTATUS ext_glGetNamedBufferPointerv( void *args )
 {
     struct glGetNamedBufferPointerv_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -8804,7 +8804,7 @@ static NTSTATUS ext_glGetNamedBufferPointerv( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glGetNamedBufferPointervEXT( void *args )
+NTSTATUS ext_glGetNamedBufferPointervEXT( void *args )
 {
     struct glGetNamedBufferPointervEXT_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -11971,7 +11971,7 @@ static NTSTATUS ext_glMap2xOES( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glMapBuffer( void *args )
+NTSTATUS ext_glMapBuffer( void *args )
 {
     struct glMapBuffer_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -11979,7 +11979,7 @@ static NTSTATUS ext_glMapBuffer( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glMapBufferARB( void *args )
+NTSTATUS ext_glMapBufferARB( void *args )
 {
     struct glMapBufferARB_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -11987,7 +11987,7 @@ static NTSTATUS ext_glMapBufferARB( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glMapBufferRange( void *args )
+NTSTATUS ext_glMapBufferRange( void *args )
 {
     struct glMapBufferRange_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -12019,7 +12019,7 @@ static NTSTATUS ext_glMapGrid2xOES( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glMapNamedBuffer( void *args )
+NTSTATUS ext_glMapNamedBuffer( void *args )
 {
     struct glMapNamedBuffer_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -12027,7 +12027,7 @@ static NTSTATUS ext_glMapNamedBuffer( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glMapNamedBufferEXT( void *args )
+NTSTATUS ext_glMapNamedBufferEXT( void *args )
 {
     struct glMapNamedBufferEXT_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -12035,7 +12035,7 @@ static NTSTATUS ext_glMapNamedBufferEXT( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glMapNamedBufferRange( void *args )
+NTSTATUS ext_glMapNamedBufferRange( void *args )
 {
     struct glMapNamedBufferRange_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -12043,7 +12043,7 @@ static NTSTATUS ext_glMapNamedBufferRange( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glMapNamedBufferRangeEXT( void *args )
+NTSTATUS ext_glMapNamedBufferRangeEXT( void *args )
 {
     struct glMapNamedBufferRangeEXT_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -20515,7 +20515,7 @@ static NTSTATUS ext_glUnlockArraysEXT( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glUnmapBuffer( void *args )
+NTSTATUS ext_glUnmapBuffer( void *args )
 {
     struct glUnmapBuffer_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -20523,7 +20523,7 @@ static NTSTATUS ext_glUnmapBuffer( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glUnmapBufferARB( void *args )
+NTSTATUS ext_glUnmapBufferARB( void *args )
 {
     struct glUnmapBufferARB_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -20531,7 +20531,7 @@ static NTSTATUS ext_glUnmapBufferARB( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glUnmapNamedBuffer( void *args )
+NTSTATUS ext_glUnmapNamedBuffer( void *args )
 {
     struct glUnmapNamedBuffer_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -20539,7 +20539,7 @@ static NTSTATUS ext_glUnmapNamedBuffer( void *args )
     return STATUS_SUCCESS;
 }

-static NTSTATUS ext_glUnmapNamedBufferEXT( void *args )
+NTSTATUS ext_glUnmapNamedBufferEXT( void *args )
 {
     struct glUnmapNamedBufferEXT_params *params = args;
     const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
@@ -36058,40 +36058,6 @@ static NTSTATUS wow64_ext_glGetBufferParameterui64vNV( void *args )
     return status;
 }

-static NTSTATUS wow64_ext_glGetBufferPointerv( void *args )
-{
-    struct
-    {
-        GLenum target;
-        GLenum pname;
-        PTR32 params;
-    } *params32 = args;
-    struct glGetBufferPointerv_params params =
-    {
-        .target = params32->target,
-        .pname = params32->pname,
-    };
-    FIXME( "params32 %p, params %p stub!\n", params32, &params );
-    return STATUS_NOT_IMPLEMENTED;
-}
-
-static NTSTATUS wow64_ext_glGetBufferPointervARB( void *args )
-{
-    struct
-    {
-        GLenum target;
-        GLenum pname;
-        PTR32 params;
-    } *params32 = args;
-    struct glGetBufferPointervARB_params params =
-    {
-        .target = params32->target,
-        .pname = params32->pname,
-    };
-    FIXME( "params32 %p, params %p stub!\n", params32, &params );
-    return STATUS_NOT_IMPLEMENTED;
-}
-
 static NTSTATUS wow64_ext_glGetBufferSubData( void *args )
 {
     struct
@@ -38539,40 +38505,6 @@ static NTSTATUS wow64_ext_glGetNamedBufferParameterui64vNV( void *args )
     return status;
 }

-static NTSTATUS wow64_ext_glGetNamedBufferPointerv( void *args )
-{
-    struct
-    {
-        GLuint buffer;
-        GLenum pname;
-        PTR32 params;
-    } *params32 = args;
-    struct glGetNamedBufferPointerv_params params =
-    {
-        .buffer = params32->buffer,
-        .pname = params32->pname,
-    };
-    FIXME( "params32 %p, params %p stub!\n", params32, &params );
-    return STATUS_NOT_IMPLEMENTED;
-}
-
-static NTSTATUS wow64_ext_glGetNamedBufferPointervEXT( void *args )
-{
-    struct
-    {
-        GLuint buffer;
-        GLenum pname;
-        PTR32 params;
-    } *params32 = args;
-    struct glGetNamedBufferPointervEXT_params params =
-    {
-        .buffer = params32->buffer,
-        .pname = params32->pname,
-    };
-    FIXME( "params32 %p, params %p stub!\n", params32, &params );
-    return STATUS_NOT_IMPLEMENTED;
-}
-
 static NTSTATUS wow64_ext_glGetNamedBufferSubData( void *args )
 {
     struct
@@ -44486,61 +44418,6 @@ static NTSTATUS wow64_ext_glMTexCoord2fvSGIS( void *args )
     return status;
 }

-static NTSTATUS wow64_ext_glMapBuffer( void *args )
-{
-    struct
-    {
-        GLenum target;
-        GLenum access;
-        PTR32 ret;
-    } *params32 = args;
-    struct glMapBuffer_params params =
-    {
-        .target = params32->target,
-        .access = params32->access,
-    };
-    FIXME( "params32 %p, params %p stub!\n", params32, &params );
-    return STATUS_NOT_IMPLEMENTED;
-}
-
-static NTSTATUS wow64_ext_glMapBufferARB( void *args )
-{
-    struct
-    {
-        GLenum target;
-        GLenum access;
-        PTR32 ret;
-    } *params32 = args;
-    struct glMapBufferARB_params params =
-    {
-        .target = params32->target,
-        .access = params32->access,
-    };
-    FIXME( "params32 %p, params %p stub!\n", params32, &params );
-    return STATUS_NOT_IMPLEMENTED;
-}
-
-static NTSTATUS wow64_ext_glMapBufferRange( void *args )
-{
-    struct
-    {
-        GLenum target;
-        PTR32 offset;
-        PTR32 length;
-        GLbitfield access;
-        PTR32 ret;
-    } *params32 = args;
-    struct glMapBufferRange_params params =
-    {
-        .target = params32->target,
-        .offset = (GLintptr)ULongToPtr(params32->offset),
-        .length = (GLsizeiptr)ULongToPtr(params32->length),
-        .access = params32->access,
-    };
-    FIXME( "params32 %p, params %p stub!\n", params32, &params );
-    return STATUS_NOT_IMPLEMENTED;
-}
-
 static NTSTATUS wow64_ext_glMapControlPointsNV( void *args )
 {
     struct
@@ -44572,82 +44449,6 @@ static NTSTATUS wow64_ext_glMapControlPointsNV( void *args )
     return status;
 }

-static NTSTATUS wow64_ext_glMapNamedBuffer( void *args )
-{
-    struct
-    {
-        GLuint buffer;
-        GLenum access;
-        PTR32 ret;
-    } *params32 = args;
-    struct glMapNamedBuffer_params params =
-    {
-        .buffer = params32->buffer,
-        .access = params32->access,
-    };
-    FIXME( "params32 %p, params %p stub!\n", params32, &params );
-    return STATUS_NOT_IMPLEMENTED;
-}
-
-static NTSTATUS wow64_ext_glMapNamedBufferEXT( void *args )
-{
-    struct
-    {
-        GLuint buffer;
-        GLenum access;
-        PTR32 ret;
-    } *params32 = args;
-    struct glMapNamedBufferEXT_params params =
-    {
-        .buffer = params32->buffer,
-        .access = params32->access,
-    };
-    FIXME( "params32 %p, params %p stub!\n", params32, &params );
-    return STATUS_NOT_IMPLEMENTED;
-}
-
-static NTSTATUS wow64_ext_glMapNamedBufferRange( void *args )
-{
-    struct
-    {
-        GLuint buffer;
-        PTR32 offset;
-        PTR32 length;
-        GLbitfield access;
-        PTR32 ret;
-    } *params32 = args;
-    struct glMapNamedBufferRange_params params =
-    {
-        .buffer = params32->buffer,
-        .offset = (GLintptr)ULongToPtr(params32->offset),
-        .length = (GLsizeiptr)ULongToPtr(params32->length),
-        .access = params32->access,
-    };
-    FIXME( "params32 %p, params %p stub!\n", params32, &params );
-    return STATUS_NOT_IMPLEMENTED;
-}
-
-static NTSTATUS wow64_ext_glMapNamedBufferRangeEXT( void *args )
-{
-    struct
-    {
-        GLuint buffer;
-        PTR32 offset;
-        PTR32 length;
-        GLbitfield access;
-        PTR32 ret;
-    } *params32 = args;
-    struct glMapNamedBufferRangeEXT_params params =
-    {
-        .buffer = params32->buffer,
-        .offset = (GLintptr)ULongToPtr(params32->offset),
-        .length = (GLsizeiptr)ULongToPtr(params32->length),
-        .access = params32->access,
-    };
-    FIXME( "params32 %p, params %p stub!\n", params32, &params );
-    return STATUS_NOT_IMPLEMENTED;
-}
-
 static NTSTATUS wow64_ext_glMapObjectBufferATI( void *args )
 {
     struct
@@ -60803,10 +60604,25 @@ extern NTSTATUS wow64_gl_glGetString( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS wow64_ext_glClientWaitSync( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS wow64_ext_glDeleteSync( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS wow64_ext_glFenceSync( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glGetBufferPointerv( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glGetBufferPointervARB( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glGetNamedBufferPointerv( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glGetNamedBufferPointervEXT( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS wow64_ext_glGetStringi( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS wow64_ext_glGetSynciv( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS wow64_ext_glIsSync( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glMapBuffer( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glMapBufferARB( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glMapBufferRange( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glMapNamedBuffer( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glMapNamedBufferEXT( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glMapNamedBufferRange( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glMapNamedBufferRangeEXT( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS wow64_ext_glPathGlyphIndexRangeNV( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glUnmapBuffer( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glUnmapBufferARB( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glUnmapNamedBuffer( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS wow64_ext_glUnmapNamedBufferEXT( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS wow64_ext_glWaitSync( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS wow64_ext_wglCreateContextAttribsARB( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS wow64_ext_wglCreatePbufferARB( void *args ) DECLSPEC_HIDDEN;
@@ -63397,10 +63213,10 @@ const unixlib_entry_t __wine_unix_call_wow64_funcs[] =
     &ext_glUniformui64NV,
     &wow64_ext_glUniformui64vNV,
     &ext_glUnlockArraysEXT,
-    &ext_glUnmapBuffer,
-    &ext_glUnmapBufferARB,
-    &ext_glUnmapNamedBuffer,
-    &ext_glUnmapNamedBufferEXT,
+    &wow64_ext_glUnmapBuffer,
+    &wow64_ext_glUnmapBufferARB,
+    &wow64_ext_glUnmapNamedBuffer,
+    &wow64_ext_glUnmapNamedBufferEXT,
     &ext_glUnmapObjectBufferATI,
     &ext_glUnmapTexture2DINTEL,
     &wow64_ext_glUpdateObjectBufferATI,
diff --git a/dlls/opengl32/unix_wgl.c b/dlls/opengl32/unix_wgl.c
index 4c1533fa55e..cc3c6a47e1d 100644
--- a/dlls/opengl32/unix_wgl.c
+++ b/dlls/opengl32/unix_wgl.c
@@ -1067,8 +1067,25 @@ typedef ULONG PTR32;
 extern NTSTATUS ext_glClientWaitSync( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS ext_glDeleteSync( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS ext_glFenceSync( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glGetBufferPointerv( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glGetBufferPointervARB( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glGetNamedBufferPointerv( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glGetNamedBufferPointervEXT( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS ext_glGetSynciv( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS ext_glIsSync( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glMapBuffer( void *args ) DECLSPEC_HIDDEN;
+
+extern NTSTATUS ext_glUnmapBuffer( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glUnmapBufferARB( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glUnmapNamedBuffer( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glUnmapNamedBufferEXT( void *args ) DECLSPEC_HIDDEN;
+
+extern NTSTATUS ext_glMapBufferARB( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glMapBufferRange( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glMapNamedBuffer( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glMapNamedBufferEXT( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glMapNamedBufferRange( void *args ) DECLSPEC_HIDDEN;
+extern NTSTATUS ext_glMapNamedBufferRangeEXT( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS ext_glPathGlyphIndexRangeNV( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS ext_glWaitSync( void *args ) DECLSPEC_HIDDEN;
 extern NTSTATUS ext_wglGetExtensionsStringARB( void *args ) DECLSPEC_HIDDEN;
@@ -1640,6 +1657,335 @@ NTSTATUS wow64_ext_glWaitSync( void *args )
     return status;
 }

+static GLint get_buffer_param( GLenum target, GLenum param )
+{
+    const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
+    typeof(*funcs->ext.p_glGetBufferParameteriv) *func;
+    GLint size = 0;
+    if (!(func = funcs->ext.p_glGetBufferParameteriv)) func = (void *)funcs->wgl.p_wglGetProcAddress( "glGetBufferParameteriv" );
+    if (func) func( target, param, &size );
+    return size;
+}
+
+static void *get_buffer_pointer( GLenum target )
+{
+    const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
+    typeof(*funcs->ext.p_glGetBufferPointerv) *func;
+    void *ptr = NULL;
+    if (!(func = funcs->ext.p_glGetBufferPointerv)) func = (void *)funcs->wgl.p_wglGetProcAddress( "glGetBufferPointerv" );
+    if (func) func( target, GL_BUFFER_MAP_POINTER, &ptr );
+    return ptr;
+}
+
+static GLint get_named_buffer_param( GLint buffer, GLenum param )
+{
+    const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
+    typeof(*funcs->ext.p_glGetNamedBufferParameteriv) *func;
+    GLint size = 0;
+    if (!(func = funcs->ext.p_glGetNamedBufferParameteriv)) func = (void *)funcs->wgl.p_wglGetProcAddress( "glGetNamedBufferParameteriv" );
+    if (func) func( buffer, param, &size );
+    return size;
+}
+
+static void *get_named_buffer_pointer( GLint buffer )
+{
+    const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
+    typeof(*funcs->ext.p_glGetNamedBufferPointerv) *func;
+    void *ptr = NULL;
+    if (!(func = funcs->ext.p_glGetNamedBufferPointerv)) func = (void *)funcs->wgl.p_wglGetProcAddress( "glGetNamedBufferPointerv" );
+    if (func) func( buffer, GL_BUFFER_MAP_POINTER, &ptr );
+    return ptr;
+}
+
+static NTSTATUS wow64_map_buffer( GLint buffer, GLenum target, void *ptr, SIZE_T size, GLbitfield access, PTR32 *ret )
+{
+    if (*ret)  /* wow64 pointer provided, map buffer to it */
+    {
+        if (access & GL_MAP_READ_BIT)
+        {
+            TRACE( "Copying %#zx from buffer at %p to wow64 buffer %p\n", size, ptr, UlongToPtr(*ret) );
+            memcpy( UlongToPtr(*ret), ptr, size );
+        }
+
+        /* save the wow64 pointer in the buffer data, we'll overwrite it on unmap */
+        *(PTR32 *)ptr = (UINT_PTR)*ret;
+        return STATUS_SUCCESS;
+    }
+
+    if (ULongToPtr(*ret = PtrToUlong(ptr)) == ptr) return STATUS_SUCCESS;  /* we're lucky */
+    if (access & GL_MAP_PERSISTENT_BIT)
+    {
+        FIXME( "GL_MAP_PERSISTENT_BIT not supported!\n" );
+        return STATUS_NOT_SUPPORTED;
+    }
+
+    if (!size) size = buffer ? get_named_buffer_param( buffer, GL_BUFFER_SIZE ) : get_buffer_param( target, GL_BUFFER_SIZE );
+    if ((PTR32)size != size) return STATUS_NO_MEMORY;  /* overflow */
+    if (size < sizeof(PTR32))
+    {
+        FIXME( "Buffer too small for metadata!\n" );
+        return STATUS_BUFFER_TOO_SMALL;
+    }
+
+    *ret = size;
+    return STATUS_INVALID_ADDRESS;
+}
+
+static NTSTATUS wow64_unmap_buffer( void *ptr, SIZE_T size, GLbitfield access )
+{
+    void *wow_ptr;
+
+    if (ULongToPtr(PtrToUlong(ptr)) == ptr) return STATUS_SUCCESS;  /* we're lucky */
+
+    wow_ptr = UlongToPtr(*(PTR32 *)ptr);
+    if (access & GL_MAP_WRITE_BIT)
+    {
+        TRACE( "Copying %#zx from wow64 buffer %p to buffer %p\n", size, wow_ptr, ptr );
+        memcpy( ptr, wow_ptr, size );
+    }
+
+    return STATUS_INVALID_ADDRESS;
+}
+
+NTSTATUS wow64_ext_glGetBufferPointerv( void *args )
+{
+    PTR32 *ptr; /* pointer to the buffer data, where we saved the wow64 pointer */
+    struct
+    {
+        GLenum target;
+        GLenum pname;
+        PTR32 params;
+    } *params32 = args;
+    struct glGetBufferPointerv_params params =
+    {
+        .target = params32->target,
+        .pname = params32->pname,
+        .params = (void **)&ptr,
+    };
+    PTR32 *wow_ptr = UlongToPtr(params32->params);
+    NTSTATUS status;
+
+    if ((status = ext_glGetBufferPointerv( &params ))) return status;
+    if (params.pname != GL_BUFFER_MAP_POINTER) return STATUS_NOT_IMPLEMENTED;
+    if (ULongToPtr(*wow_ptr = PtrToUlong(ptr)) == ptr) return STATUS_SUCCESS;  /* we're lucky */
+    *wow_ptr = ptr[0];
+    return STATUS_SUCCESS;
+}
+
+NTSTATUS wow64_ext_glGetBufferPointervARB( void *args )
+{
+    return wow64_ext_glGetBufferPointerv( args );
+}
+
+NTSTATUS wow64_ext_glGetNamedBufferPointerv( void *args )
+{
+    PTR32 *ptr; /* pointer to the buffer data, where we saved the wow64 pointer */
+    struct
+    {
+        GLuint buffer;
+        GLenum pname;
+        PTR32 params;
+    } *params32 = args;
+    struct glGetNamedBufferPointerv_params params =
+    {
+        .buffer = params32->buffer,
+        .pname = params32->pname,
+        .params = (void **)&ptr,
+    };
+    PTR32 *wow_ptr = UlongToPtr(params32->params);
+    NTSTATUS status;
+
+    if ((status = ext_glGetNamedBufferPointerv( &params ))) return status;
+    if (params.pname != GL_BUFFER_MAP_POINTER) return STATUS_NOT_IMPLEMENTED;
+    if (ULongToPtr(*wow_ptr = PtrToUlong(ptr)) == ptr) return STATUS_SUCCESS;  /* we're lucky */
+    *wow_ptr = ptr[0];
+    return STATUS_SUCCESS;
+}
+
+NTSTATUS wow64_ext_glGetNamedBufferPointervEXT( void *args )
+{
+    return wow64_ext_glGetNamedBufferPointerv( args );
+}
+
+NTSTATUS wow64_ext_glMapBuffer( void *args )
+{
+    struct
+    {
+        GLenum target;
+        GLenum access;
+        PTR32 ret;
+    } *params32 = args;
+    struct glMapBuffer_params params =
+    {
+        .target = params32->target,
+        .access = params32->access,
+    };
+    struct glUnmapBuffer_params unmap_params = { .target = params.target };
+    NTSTATUS status;
+
+    /* already mapped, we're being called again with a wow64 pointer */
+    if (params32->ret) params.ret = get_buffer_pointer( params.target );
+    else if ((status = ext_glMapBuffer( &params ))) return status;
+
+    status = wow64_map_buffer( 0, params.target, params.ret, 0, params.access, &params32->ret );
+    if (!status || status == STATUS_INVALID_ADDRESS) return status;
+
+    ext_glUnmapBuffer( &unmap_params );
+    return status;
+}
+
+NTSTATUS wow64_ext_glMapBufferARB( void *args )
+{
+    return wow64_ext_glMapBuffer( args );
+}
+
+NTSTATUS wow64_ext_glMapBufferRange( void *args )
+{
+    struct
+    {
+        GLenum target;
+        PTR32 offset;
+        PTR32 length;
+        GLbitfield access;
+        PTR32 ret;
+    } *params32 = args;
+    struct glMapBufferRange_params params =
+    {
+        .target = params32->target,
+        .offset = (GLintptr)ULongToPtr(params32->offset),
+        .length = (GLsizeiptr)ULongToPtr(params32->length),
+        .access = params32->access,
+    };
+    struct glUnmapBuffer_params unmap_params = { .target = params.target };
+    NTSTATUS status;
+
+    /* already mapped, we're being called again with a wow64 pointer */
+    if (params32->ret) params.ret = (char *)get_buffer_pointer( params.target );
+    else if ((status = ext_glMapBufferRange( &params ))) return status;
+
+    status = wow64_map_buffer( 0, params.target, params.ret, params.length, params.access, &params32->ret );
+    if (!status || status == STATUS_INVALID_ADDRESS) return status;
+
+    ext_glUnmapBuffer( &unmap_params );
+    return status;
+}
+
+NTSTATUS wow64_ext_glMapNamedBuffer( void *args )
+{
+    struct
+    {
+        GLuint buffer;
+        GLenum access;
+        PTR32 ret;
+    } *params32 = args;
+    struct glMapNamedBuffer_params params =
+    {
+        .buffer = params32->buffer,
+        .access = params32->access,
+    };
+    struct glUnmapNamedBuffer_params unmap_params = { .buffer = params.buffer };
+    NTSTATUS status;
+
+    /* already mapped, we're being called again with a wow64 pointer */
+    if (params32->ret) params.ret = get_named_buffer_pointer( params.buffer );
+    else if ((status = ext_glMapNamedBuffer( &params ))) return status;
+
+    status = wow64_map_buffer( params.buffer, 0, params.ret, 0, params.access, &params32->ret );
+    if (!status || status == STATUS_INVALID_ADDRESS) return status;
+
+    ext_glUnmapNamedBuffer( &unmap_params );
+    return status;
+}
+
+NTSTATUS wow64_ext_glMapNamedBufferEXT( void *args )
+{
+    return wow64_ext_glMapNamedBuffer( args );
+}
+
+NTSTATUS wow64_ext_glMapNamedBufferRange( void *args )
+{
+    struct
+    {
+        GLuint buffer;
+        PTR32 offset;
+        PTR32 length;
+        GLbitfield access;
+        PTR32 ret;
+    } *params32 = args;
+    struct glMapNamedBufferRange_params params =
+    {
+        .buffer = params32->buffer,
+        .offset = (GLintptr)ULongToPtr(params32->offset),
+        .length = (GLsizeiptr)ULongToPtr(params32->length),
+        .access = params32->access,
+    };
+    struct glUnmapNamedBuffer_params unmap_params = { .buffer = params.buffer };
+    NTSTATUS status;
+
+    /* already mapped, we're being called again with a wow64 pointer */
+    if (params32->ret) params.ret = get_named_buffer_pointer( params.buffer );
+    else if ((status = ext_glMapNamedBufferRange( &params ))) return status;
+
+    status = wow64_map_buffer( params.buffer, 0, params.ret, params.length, params.access, &params32->ret );
+    if (!status || status == STATUS_INVALID_ADDRESS) return status;
+
+    ext_glUnmapNamedBuffer( &unmap_params );
+    return status;
+}
+
+NTSTATUS wow64_ext_glMapNamedBufferRangeEXT( void *args )
+{
+    return wow64_ext_glMapNamedBufferRange( args );
+}
+
+NTSTATUS wow64_ext_glUnmapBuffer( void *args )
+{
+    PTR32 *ptr;
+    struct
+    {
+        GLenum target;
+        GLboolean ret;
+    } *params32 = args;
+    NTSTATUS status;
+
+    if (!(ptr = get_buffer_pointer( params32->target ))) return STATUS_SUCCESS;
+
+    status = wow64_unmap_buffer( ptr, get_buffer_param( params32->target, GL_BUFFER_MAP_LENGTH ),
+                                 get_buffer_param( params32->target, GL_BUFFER_ACCESS_FLAGS ) );
+    ext_glUnmapBuffer( args );
+
+    return status;
+}
+
+NTSTATUS wow64_ext_glUnmapBufferARB( void *args )
+{
+    return wow64_ext_glUnmapBuffer( args );
+}
+
+NTSTATUS wow64_ext_glUnmapNamedBuffer( void *args )
+{
+    PTR32 *ptr;
+    struct
+    {
+        GLint buffer;
+        GLboolean ret;
+    } *params32 = args;
+    NTSTATUS status;
+
+    if (!(ptr = get_named_buffer_pointer( params32->buffer ))) return STATUS_SUCCESS;
+
+    status = wow64_unmap_buffer( ptr, get_named_buffer_param( params32->buffer, GL_BUFFER_MAP_LENGTH ),
+                                 get_named_buffer_param( params32->buffer, GL_BUFFER_ACCESS_FLAGS ) );
+    ext_glUnmapNamedBuffer( args );
+
+    return status;
+}
+
+NTSTATUS wow64_ext_glUnmapNamedBufferEXT( void *args )
+{
+    return wow64_ext_glUnmapNamedBuffer( args );
+}
+
 NTSTATUS WINAPI wow64_process_detach( void *args )
 {
     NTSTATUS status;
diff --git a/dlls/opengl32/wgl.c b/dlls/opengl32/wgl.c
index ff9e6164c89..2ffdc20c057 100644
--- a/dlls/opengl32/wgl.c
+++ b/dlls/opengl32/wgl.c
@@ -28,6 +28,7 @@
 #include "winbase.h"
 #include "winreg.h"
 #include "ntuser.h"
+#include "malloc.h"

#include "unixlib.h"
 #include "private.h"
@@ -1036,6 +1037,26 @@ const GLchar * WINAPI wglQueryRendererStringWINE( HDC dc, GLint renderer, GLenum
     return args.ret;
 }

+#ifndef _WIN64
+static void *get_buffer_pointer( GLenum target )
+{
+    void (WINAPI *p_glGetBufferPointerv)( GLenum target, GLenum pname, void **params );
+    void *ptr;
+    if (!(p_glGetBufferPointerv = (void *)wglGetProcAddress( "glGetBufferPointerv" ))) return 0;
+    p_glGetBufferPointerv( target, GL_BUFFER_MAP_POINTER, &ptr );
+    return ptr;
+}
+
+static void *get_named_buffer_pointer( GLint buffer )
+{
+    void (WINAPI *p_glGetNamedBufferPointerv)( GLuint buffer, GLenum pname, void **params );
+    void *ptr;
+    if (!(p_glGetNamedBufferPointerv = (void *)wglGetProcAddress( "glGetNamedBufferPointerv" ))) return 0;
+    p_glGetNamedBufferPointerv( buffer, GL_BUFFER_MAP_POINTER, &ptr );
+    return ptr;
+}
+#endif
+
 void * WINAPI glMapBuffer( GLenum target, GLenum access )
 {
     struct glMapBuffer_params args =
@@ -1048,6 +1069,15 @@ void * WINAPI glMapBuffer( GLenum target, GLenum access )
     TRACE( "target %d, access %d\n", target, access );

if (!(status = UNIX_CALL( glMapBuffer, &args ))) return args.ret;
+#ifndef _WIN64
+    if (status == STATUS_INVALID_ADDRESS)
+    {
+        TRACE( "Unable to map wow64 buffer directly, using copy buffer!\n" );
+        if (!(args.ret = _aligned_malloc( (size_t)args.ret, 16 ))) status = STATUS_NO_MEMORY;
+        else if (!(status = UNIX_CALL( glMapBuffer, &args ))) return args.ret;
+        _aligned_free( args.ret );
+    }
+#endif
     WARN( "glMapBuffer returned %#lx\n", status );
     return args.ret;
 }
@@ -1071,6 +1101,15 @@ void * WINAPI glMapBufferRange( GLenum target, GLintptr offset, GLsizeiptr lengt
     TRACE( "target %d, offset %Id, length %Id, access %d\n", target, offset, length, access );

if (!(status = UNIX_CALL( glMapBufferRange, &args ))) return args.ret;
+#ifndef _WIN64
+    if (status == STATUS_INVALID_ADDRESS)
+    {
+        TRACE( "Unable to map wow64 buffer directly, using copy buffer!\n" );
+        if (!(args.ret = _aligned_malloc( length, 16 ))) status = STATUS_NO_MEMORY;
+        else if (!(status = UNIX_CALL( glMapBufferRange, &args ))) return args.ret;
+        _aligned_free( args.ret );
+    }
+#endif
     WARN( "glMapBufferRange returned %#lx\n", status );
     return args.ret;
 }
@@ -1087,6 +1126,15 @@ void * WINAPI glMapNamedBuffer( GLuint buffer, GLenum access )
     TRACE( "(%d, %d)\n", buffer, access );

if (!(status = UNIX_CALL( glMapNamedBuffer, &args ))) return args.ret;
+#ifndef _WIN64
+    if (status == STATUS_INVALID_ADDRESS)
+    {
+        TRACE( "Unable to map wow64 buffer directly, using copy buffer!\n" );
+        if (!(args.ret = _aligned_malloc( (size_t)args.ret, 16 ))) status = STATUS_NO_MEMORY;
+        else if (!(status = UNIX_CALL( glMapNamedBuffer, &args ))) return args.ret;
+        _aligned_free( args.ret );
+    }
+#endif
     WARN( "glMapNamedBuffer returned %#lx\n", status );
     return args.ret;
 }
@@ -1110,6 +1158,15 @@ void * WINAPI glMapNamedBufferRange( GLuint buffer, GLintptr offset, GLsizeiptr
     TRACE( "buffer %d, offset %Id, length %Id, access %d\n", buffer, offset, length, access );

if (!(status = UNIX_CALL( glMapNamedBufferRange, &args ))) return args.ret;
+#ifndef _WIN64
+    if (status == STATUS_INVALID_ADDRESS)
+    {
+        TRACE( "Unable to map wow64 buffer directly, using copy buffer!\n" );
+        if (!(args.ret = _aligned_malloc( length, 16 ))) status = STATUS_NO_MEMORY;
+        else if (!(status = UNIX_CALL( glMapNamedBufferRange, &args ))) return args.ret;
+        _aligned_free( args.ret );
+    }
+#endif
     WARN( "glMapNamedBufferRange returned %#lx\n", status );
     return args.ret;
 }
@@ -1126,10 +1183,21 @@ GLboolean WINAPI glUnmapBuffer( GLenum target )
         .target = target,
     };
     NTSTATUS status;
+#ifndef _WIN64
+    void *ptr = get_buffer_pointer( target );
+#endif

TRACE( "target %d\n", target );

if (!(status = UNIX_CALL( glUnmapBuffer, &args ))) return args.ret;
+#ifndef _WIN64
+    if (status == STATUS_INVALID_ADDRESS)
+    {
+        TRACE( "Releasing wow64 copy buffer %p\n", ptr );
+        _aligned_free( ptr );
+        return args.ret;
+    }
+#endif
     WARN( "glUnmapBuffer returned %#lx\n", status );
     return args.ret;
 }
@@ -1146,10 +1214,21 @@ GLboolean WINAPI glUnmapNamedBuffer( GLuint buffer )
         .buffer = buffer,
     };
     NTSTATUS status;
+#ifndef _WIN64
+    void *ptr = get_named_buffer_pointer( buffer );
+#endif

TRACE( "buffer %d\n", buffer );

if (!(status = UNIX_CALL( glUnmapNamedBuffer, &args ))) return args.ret;
+#ifndef _WIN64
+    if (status == STATUS_INVALID_ADDRESS)
+    {
+        TRACE( "Releasing wow64 copy buffer %p\n", ptr );
+        _aligned_free( ptr );
+        return args.ret;
+    }
+#endif
     WARN( "glUnmapNamedBuffer returned %#lx\n", status );
     return args.ret;
 }