[PATCH 3/4] win32u: Add gdi_image_bits allocation function based on freelist cache allocator.

[Jinoh Kang]

Signed-off-by: Jinoh Kang 
---
 dlls/win32u/bitblt.c        | 19 +++++++++++++++++++
 dlls/win32u/ntgdi_private.h |  4 ++++
 2 files changed, 23 insertions(+)

diff --git a/dlls/win32u/bitblt.c b/dlls/win32u/bitblt.c
index d7bbd353b2d..44bee3ef80a 100644
--- a/dlls/win32u/bitblt.c
+++ b/dlls/win32u/bitblt.c
@@ -168,6 +168,25 @@ void CDECL free_heap_bits( struct gdi_image_bits *bits )
     free( bits->ptr );
 }

+static void CDECL free_gdi_cache_bits( struct gdi_image_bits *bits )
+{
+    free_gdi_cache_memory( bits->ptr, (SIZE_T)bits->param );
+}
+
+BOOL alloc_gdi_cache_bits( struct gdi_image_bits *bits, SIZE_T size, int flags )
+{
+    void *mem = alloc_gdi_cache_memory( size, flags & ALLOC_ZERO_MEMORY );
+
+    if (!mem)
+        return FALSE;
+
+    bits->ptr = mem;
+    bits->is_copy = !!(flags & ALLOC_IS_COPY);
+    bits->free = free_gdi_cache_bits;
+    bits->param = (void *)size;
+    return TRUE;
+}
+
 DWORD convert_bits( const BITMAPINFO *src_info, struct bitblt_coords *src,
                     BITMAPINFO *dst_info, struct gdi_image_bits *bits )
 {
diff --git a/dlls/win32u/ntgdi_private.h b/dlls/win32u/ntgdi_private.h
index 5e5f6041865..bcd9a55785c 100644
--- a/dlls/win32u/ntgdi_private.h
+++ b/dlls/win32u/ntgdi_private.h
@@ -676,6 +676,10 @@ static inline void copy_bitmapinfo( BITMAPINFO *dst, const BITMAPINFO *src )
     memcpy( dst, src, get_dib_info_size( src, DIB_RGB_COLORS ));
 }

+#define ALLOC_ZERO_MEMORY  1
+#define ALLOC_IS_COPY      2
+
+extern BOOL alloc_gdi_cache_bits( struct gdi_image_bits *bits, SIZE_T size, int flags ) DECLSPEC_HIDDEN;
 extern void CDECL free_heap_bits( struct gdi_image_bits *bits ) DECLSPEC_HIDDEN;

void set_gdi_client_ptr( HGDIOBJ handle, void *ptr ) DECLSPEC_HIDDEN;