[PATCH 1/1] opengl32: Use Vulkan-backed buffer storage only when GL_MAP_PERSISTENT_BIT is specified.

[Jacek Caban]

From: Jacek Caban

Non-persistent mappings have additional synchronization guarantees on map that are
hard to emulate with Vulkan. Fall back to the memcpy code path instead.
---
 dlls/opengl32/unix_wgl.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/dlls/opengl32/unix_wgl.c b/dlls/opengl32/unix_wgl.c
index 085df429202..4cb68511b6a 100644
--- a/dlls/opengl32/unix_wgl.c
+++ b/dlls/opengl32/unix_wgl.c
@@ -2421,6 +2421,7 @@ static struct buffer *create_buffer_storage( TEB *teb, GLenum target, GLuint nam
     int fd, memory_type;
     VkResult vr;

+    if (!(flags & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT))) return NULL;
     if (!(vk_device = ctx->buffers->vk_device) || !vk_device->vk_device) return NULL;

if (flags & GL_CLIENT_STORAGE_BIT) desired_type &= ~VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
@@ -2619,7 +2620,7 @@ void wow64_glBufferStorage( TEB *teb, GLenum target, GLsizeiptr size, const void
     const struct opengl_funcs *funcs = teb->glTable;
     struct buffer *buffer = NULL;

-    if (flags & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT))
+    if (flags & GL_MAP_PERSISTENT_BIT)
         buffer = create_buffer_storage( teb, target, 0, size, data, flags );

if (!buffer) funcs->p_glBufferStorage( target, size, data, flags );
@@ -2630,7 +2631,7 @@ void wow64_glNamedBufferStorage( TEB *teb, GLuint name, GLsizeiptr size, const v
     const struct opengl_funcs *funcs = teb->glTable;
     struct buffer *buffer = NULL;

-    if (flags & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT))
+    if (flags & GL_MAP_PERSISTENT_BIT)
         buffer = create_buffer_storage( teb, 0, name, size, data, flags );

if (!buffer) funcs->p_glNamedBufferStorage( name, size, data, flags );
@@ -2641,7 +2642,7 @@ void wow64_glNamedBufferStorageEXT( TEB *teb, GLuint name, GLsizeiptr size, cons
     const struct opengl_funcs *funcs = teb->glTable;
     struct buffer *buffer = NULL;

-    if (flags & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT))
+    if (flags & GL_MAP_PERSISTENT_BIT)
         buffer = create_buffer_storage( teb, 0, name, size, data, flags );

if (!buffer) funcs->p_glNamedBufferStorageEXT( name, size, data, flags );