wined3d: Fix the center offset in get_projection_matrix.

If we have clip control, viewport_miscpart_cc applies both the half pixel offset and the filling convention nudge. We always have integer pixel centers in this <= d3d9-only codepath. Signed-off-by: Stefan Dösinger <stefan@codeweavers.com> Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

wined3d: Fix the center offset in get_projection_matrix.
235908a7 · Stefan Dösinger · Alexandre Julliard · d2daa8b9 · 235908a7
Commit 235908a7 authored Sep 29, 2021 by Stefan Dösinger Committed by Alexandre Julliard Oct 05, 2021
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utils.c dlls/wined3d/utils.c +6 -2

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--- a/dlls/wined3d/utils.c
+++ b/dlls/wined3d/utils.c
@@ -5550,12 +5550,16 @@ void get_projection_matrix(const struct wined3d_context *context, const struct w
     * driver, but small enough to prevent it from interfering with any
     * anti-aliasing. */

+    /* Projection matrices are <= d3d9, which all have integer pixel centers. */
+    if (!(d3d_info->wined3d_creation_flags & WINED3D_PIXEL_CENTER_INTEGER))
+        ERR("Did not expect to enter this codepath without WINED3D_PIXEL_CENTER_INTEGER.\n");
+
    clip_control = d3d_info->clip_control;
    flip = !clip_control && context->render_offscreen;
-    if (!clip_control && d3d_info->wined3d_creation_flags & WINED3D_PIXEL_CENTER_INTEGER)
+    if (!clip_control)
        center_offset = 63.0f / 64.0f;
    else
-        center_offset = -1.0f / 64.0f;
+        center_offset = 0.0f;

    if (context->last_was_rhw)
    {