wined3d: Don't use GL_ARB_map_buffer_range for now.

There are numerous problems with this extension, and there are no visible upsides. In the best case dynamic VBOs are just as fast as no VBO at all.

wined3d: Don't use GL_ARB_map_buffer_range for now.
481aca47 · Stefan Dösinger · Alexandre Julliard · b98f916d · 481aca47
Commit 481aca47 authored May 05, 2010 by Stefan Dösinger Committed by Alexandre Julliard May 10, 2010
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buffer.c dlls/wined3d/buffer.c +2 -1

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--- a/dlls/wined3d/buffer.c
+++ b/dlls/wined3d/buffer.c
@@ -1474,7 +1474,8 @@ HRESULT buffer_init(struct wined3d_buffer *buffer, IWineD3DDeviceImpl *device,
    TRACE("size %#x, usage %#x, format %s, memory @ %p, iface @ %p.\n", buffer->resource.size, buffer->resource.usage,
            debug_d3dformat(buffer->resource.format_desc->format), buffer->resource.allocatedMemory, buffer);

-    dynamic_buffer_ok = gl_info->supported[APPLE_FLUSH_BUFFER_RANGE] || gl_info->supported[ARB_MAP_BUFFER_RANGE];
+    /* GL_ARB_map_buffer_range is disabled for now due to numerous bugs and no gains */
+    dynamic_buffer_ok = gl_info->supported[APPLE_FLUSH_BUFFER_RANGE];

    /* Observations show that drawStridedSlow is faster on dynamic VBs than converting +
     * drawStridedFast (half-life 2 and others).