[PATCH v2 0/1] MR5145: Draft: opengl32: speed up wow64 mapping

[Etaash Mathamsetty (＠etaash.mathamsetty)]

My hardware is Ryzen 7 4700u with the integrated graphics

Flatout (Direct3D 9): 3 fps to 40 fps (renders correctly)   
Unigine Heaven (OpenGL): ~17 fps (renders correctly)   
Unigine Heaven (Direct3D 9): 20-30 fps (renders correctly)   
Unigine Heaven (Direct3D 11): 20-30 fps as well (renders correctly)  
Elder Scrolls IV (Direct3D 9): 20 fps (broken intro videos, ingame rendering looks correct, old mapping code works just fine in the intro videos)   
BeamNG Tech Demo 0.3 (Direct3D 9): 2 fps (renders correctly, but still runs poorly)

These numbers are from my memory, I will update them with the more accurate numbers when I get home.
Unfortunately, we lose the ability to get lucky with the mapping just happening to be in the 32 bit range.

--
  v2: opengl32: speed up wow64 mapping

https://gitlab.winehq.org/wine/wine/-/merge_requests/5145

[PATCH v2 1/1] opengl32: speed up wow64 mapping

[Etaash Mathamsetty]

From: Etaash Mathamsetty

---
 dlls/opengl32/unix_wgl.c | 105 ++++++++++++++++++++++++++++-----------
 1 file changed, 77 insertions(+), 28 deletions(-)

diff --git a/dlls/opengl32/unix_wgl.c b/dlls/opengl32/unix_wgl.c
index 453a9824046..3dc8c53911e 100644
--- a/dlls/opengl32/unix_wgl.c
+++ b/dlls/opengl32/unix_wgl.c
@@ -1852,8 +1852,40 @@ static void unmap_named_buffer( TEB *teb, GLint buffer )
     if (func) func( buffer );
 }

-static NTSTATUS wow64_map_buffer( TEB *teb, GLint buffer, GLenum target, void *ptr, SIZE_T size,
-                                  GLbitfield access, PTR32 *ret )
+static void gl_buffer_sub_data( TEB *teb, GLenum target, GLintptr offset, GLsizeiptr size, const void *data )
+{
+    const struct opengl_funcs *funcs = teb->glTable;
+    typeof(*funcs->ext.p_glBufferSubData) *func;
+    if (!(func = funcs->ext.p_glBufferSubData)) func = (void *)funcs->wgl.p_wglGetProcAddress( "glBufferSubData" );
+    if (func) func( target, offset, size, data );
+}
+
+static void gl_named_buffer_sub_data( TEB *teb, GLint buffer, GLintptr offset, GLsizeiptr size, const void *data )
+{
+    const struct opengl_funcs *funcs = teb->glTable;
+    typeof(*funcs->ext.p_glNamedBufferSubData) *func;
+    if (!(func = funcs->ext.p_glNamedBufferSubData)) func = (void *)funcs->wgl.p_wglGetProcAddress( "glNamedBufferSubData" );
+    if (func) func( buffer, offset, size, data );
+}
+
+static void gl_get_buffer_sub_data( TEB *teb, GLenum target, GLintptr offset, GLsizeiptr size, void *data )
+{
+    const struct opengl_funcs *funcs = teb->glTable;
+    typeof(*funcs->ext.p_glBufferSubData) *func;
+    if (!(func = funcs->ext.p_glBufferSubData)) func = (void *)funcs->wgl.p_wglGetProcAddress( "glGetBufferSubData" );
+    if (func) func( target, offset, size, data );
+}
+
+static void gl_get_named_buffer_sub_data( TEB *teb, GLint buffer, GLintptr offset, GLsizeiptr size, void *data )
+{
+    const struct opengl_funcs *funcs = teb->glTable;
+    typeof(*funcs->ext.p_glGetNamedBufferSubData) *func;
+    if (!(func = funcs->ext.p_glGetNamedBufferSubData)) func = (void *)funcs->wgl.p_wglGetProcAddress( "glGetNamedBufferSubData" );
+    if (func) func( buffer, offset, size, data );
+}
+
+static NTSTATUS wow64_map_buffer( TEB *teb, GLint buffer, GLenum target, void **ptr, GLintptr offset, SIZE_T size,
+                                  GLbitfield access, PTR32 *ret, NTSTATUS (*gl_map_buffer64)(void *), void *params )
 {
     static unsigned int once;

@@ -1865,15 +1897,19 @@ static NTSTATUS wow64_map_buffer( TEB *teb, GLint buffer, GLenum target, void *p
                 FIXME( "Doing a copy of a mapped buffer (expect performance issues)\n" );

TRACE( "Copying %#zx from buffer at %p to wow64 buffer %p\n", size, ptr, UlongToPtr(*ret) );
-            memcpy( UlongToPtr(*ret), ptr, size );
+            if (buffer)
+                gl_get_named_buffer_sub_data( teb, buffer, offset, size, UlongToPtr(*ret) );
+            else
+                gl_get_buffer_sub_data( teb, target, offset, size, UlongToPtr(*ret) );
         }

+        gl_map_buffer64(params);
+
         /* save the wow64 pointer in the buffer data, we'll overwrite it on unmap */
-        *(PTR32 *)ptr = (UINT_PTR)*ret;
+        *(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" );
@@ -1905,17 +1941,23 @@ static GLbitfield map_range_flags_from_map_flags( GLenum flags )
     }
 }

-static NTSTATUS wow64_unmap_buffer( void *ptr, SIZE_T size, GLbitfield access )
+static NTSTATUS wow64_unmap_buffer( TEB *teb, void *ptr, GLenum target, GLint buffer, GLintptr offset, 
+                                    SIZE_T size, GLbitfield access, NTSTATUS (*gl_unmap_buffer64)(void *), void *params)
 {
-    void *wow_ptr;
+    void *wow_ptr = UlongToPtr(*(PTR32 *)ptr);

-    if (ULongToPtr(PtrToUlong(ptr)) == ptr) return STATUS_SUCCESS;  /* we're lucky */
+    /* overwrite the stored pointer with the correct data */
+    *(PTR32 *)ptr = *(PTR32*)wow_ptr;
+
+    gl_unmap_buffer64( params );

-    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 );
+        if (buffer)
+            gl_named_buffer_sub_data( teb, buffer, offset, size, wow_ptr );
+        else
+            gl_buffer_sub_data( teb, target, offset, size, wow_ptr );
     }

return STATUS_INVALID_ADDRESS;
@@ -1943,7 +1985,7 @@ static NTSTATUS wow64_gl_get_buffer_pointer_v( void *args, NTSTATUS (*get_buffer

if ((status = get_buffer_pointer_v64( &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;
 }
@@ -1980,7 +2022,7 @@ static NTSTATUS wow64_gl_get_named_buffer_pointer_v( void *args, NTSTATUS (*gl_g

if ((status = gl_get_named_buffer_pointer_v64( &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;
 }
@@ -2014,10 +2056,10 @@ static NTSTATUS wow64_gl_map_buffer( void *args, NTSTATUS (*gl_map_buffer64)(voi

/* already mapped, we're being called again with a wow64 pointer */
     if (params32->ret) params.ret = get_buffer_pointer( params.teb, params.target );
-    else if ((status = gl_map_buffer64( &params ))) return status;

-    status = wow64_map_buffer( params.teb, 0, params.target, params.ret, 0,
-                               map_range_flags_from_map_flags( params.access ), &params32->ret );
+    status = wow64_map_buffer( params.teb, 0, params.target, &params.ret, 0, 0,
+                               map_range_flags_from_map_flags( params.access ), &params32->ret,
+                               gl_map_buffer64, &params );
     if (!status || status == STATUS_INVALID_ADDRESS) return status;

unmap_buffer( params.teb, params.target );
@@ -2057,9 +2099,10 @@ NTSTATUS wow64_ext_glMapBufferRange( void *args )

/* already mapped, we're being called again with a wow64 pointer */
     if (params32->ret) params.ret = (char *)get_buffer_pointer( params.teb, params.target );
-    else if ((status = ext_glMapBufferRange( &params ))) return status;

-    status = wow64_map_buffer( params.teb, 0, params.target, params.ret, params.length, params.access, &params32->ret );
+    status = wow64_map_buffer( params.teb, 0, params.target, &params.ret, params.offset, 
+                               params.length, params.access, &params32->ret,
+                               ext_glMapBufferRange, &params );
     if (!status || status == STATUS_INVALID_ADDRESS) return status;

unmap_buffer( params.teb, params.target );
@@ -2085,10 +2128,10 @@ static NTSTATUS wow64_gl_map_named_buffer( void *args, NTSTATUS (*gl_map_named_b

/* already mapped, we're being called again with a wow64 pointer */
     if (params32->ret) params.ret = get_named_buffer_pointer( params.teb, params.buffer );
-    else if ((status = gl_map_named_buffer64( &params ))) return status;

-    status = wow64_map_buffer( params.teb, params.buffer, 0, params.ret, 0,
-                               map_range_flags_from_map_flags( params.access ), &params32->ret );
+    status = wow64_map_buffer( params.teb, params.buffer, 0, &params.ret, 0, 0,
+                               map_range_flags_from_map_flags( params.access ), &params32->ret, 
+                               gl_map_named_buffer64, &params );
     if (!status || status == STATUS_INVALID_ADDRESS) return status;

unmap_named_buffer( params.teb, params.buffer );
@@ -2128,9 +2171,10 @@ static NTSTATUS wow64_gl_map_named_buffer_range( void *args, NTSTATUS (*gl_map_n

/* already mapped, we're being called again with a wow64 pointer */
     if (params32->ret) params.ret = get_named_buffer_pointer( params.teb, params.buffer );
-    else if ((status = gl_map_named_buffer_range64( &params ))) return status;

-    status = wow64_map_buffer( params.teb, params.buffer, 0, params.ret, params.length, params.access, &params32->ret );
+    status = wow64_map_buffer( params.teb, params.buffer, 0, &params.ret, params.offset, 
+                               params.length, params.access, &params32->ret,
+                               gl_map_named_buffer_range64, &params );
     if (!status || status == STATUS_INVALID_ADDRESS) return status;

unmap_named_buffer( params.teb, params.buffer );
@@ -2166,9 +2210,12 @@ static NTSTATUS wow64_gl_unmap_buffer( void *args, NTSTATUS (*gl_unmap_buffer64)

if (!(ptr = get_buffer_pointer( params.teb, params.target ))) return STATUS_SUCCESS;

-    status = wow64_unmap_buffer( ptr, get_buffer_param( params.teb, params.target, GL_BUFFER_MAP_LENGTH ),
-                                 get_buffer_param( params.teb, params.target, GL_BUFFER_ACCESS_FLAGS ) );
-    gl_unmap_buffer64( &params );
+    status = wow64_unmap_buffer( params.teb, ptr, params.target, 0,
+                                 get_buffer_param( params.teb, params.target, GL_BUFFER_MAP_OFFSET ),
+                                 get_buffer_param( params.teb, params.target, GL_BUFFER_MAP_LENGTH ),
+                                 get_buffer_param( params.teb, params.target, GL_BUFFER_ACCESS_FLAGS ), 
+                                 gl_unmap_buffer64, &params );
+
     params32->ret = params.ret;

return status;
@@ -2203,9 +2250,11 @@ static NTSTATUS wow64_gl_unmap_named_buffer( void *args, NTSTATUS (*gl_unmap_nam

if (!(ptr = get_named_buffer_pointer( params.teb, params.buffer ))) return STATUS_SUCCESS;

-    status = wow64_unmap_buffer( ptr, get_named_buffer_param( params.teb, params.buffer, GL_BUFFER_MAP_LENGTH ),
-                                 get_named_buffer_param( params.teb, params.buffer, GL_BUFFER_ACCESS_FLAGS ) );
-    gl_unmap_named_buffer64( &params );
+    status = wow64_unmap_buffer( params.teb, ptr, 0, params.buffer, 
+                                 get_named_buffer_param( params.teb, params.buffer, GL_BUFFER_MAP_OFFSET ),
+                                 get_named_buffer_param( params.teb, params.buffer, GL_BUFFER_MAP_LENGTH ),
+                                 get_named_buffer_param( params.teb, params.buffer, GL_BUFFER_ACCESS_FLAGS ), 
+                                 gl_unmap_named_buffer64, &params );
     params32->ret = params.ret;

return status;