From 5e28b0c9747369b752102e56b94e58a012b8cf6d Mon Sep 17 00:00:00 2001
From: Matteo Bruni <mbruni@codeweavers.com>
Date: Mon, 18 Feb 2013 13:56:23 +0100
Subject: [PATCH] wined3d: Add RESZ support.

---
 dlls/wined3d/device.c  | 22 ++++++++++++++++++++++
 dlls/wined3d/utils.c   | 11 +++++++++++
 include/wine/wined3d.h |  3 +++
 3 files changed, 36 insertions(+)

diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index bbd27df736e..c7874ba6c54 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -2212,6 +2212,22 @@ void CDECL wined3d_device_get_viewport(const struct wined3d_device *device, stru
     *viewport = device->stateBlock->state.viewport;
 }
 
+static void resolve_depth_buffer(struct wined3d_state *state)
+{
+    struct wined3d_texture *texture = state->textures[0];
+    struct wined3d_surface *depth_stencil, *surface;
+
+    if (!texture || texture->resource.type != WINED3D_RTYPE_TEXTURE
+            || !(texture->resource.format->flags & WINED3DFMT_FLAG_DEPTH))
+        return;
+    surface = surface_from_resource(texture->sub_resources[0]);
+    depth_stencil = state->fb->depth_stencil;
+    if (!depth_stencil)
+        return;
+
+    wined3d_surface_blt(surface, NULL, depth_stencil, NULL, 0, NULL, WINED3D_TEXF_POINT);
+}
+
 void CDECL wined3d_device_set_render_state(struct wined3d_device *device,
         enum wined3d_render_state state, DWORD value)
 {
@@ -2234,6 +2250,12 @@ void CDECL wined3d_device_set_render_state(struct wined3d_device *device,
         TRACE("Application is setting the old value over, nothing to do.\n");
     else
         device_invalidate_state(device, STATE_RENDER(state));
+
+    if (state == WINED3D_RS_POINTSIZE && value == WINED3D_RESZ_CODE)
+    {
+        TRACE("RESZ multisampled depth buffer resolve triggered.\n");
+        resolve_depth_buffer(&device->stateBlock->state);
+    }
 }
 
 DWORD CDECL wined3d_device_get_render_state(const struct wined3d_device *device, enum wined3d_render_state state)
diff --git a/dlls/wined3d/utils.c b/dlls/wined3d/utils.c
index 4b29ec86afc..7c508eee2b3 100644
--- a/dlls/wined3d/utils.c
+++ b/dlls/wined3d/utils.c
@@ -126,6 +126,7 @@ static const struct wined3d_format_channels formats[] =
     {WINED3DFMT_NVDB,                       0,  0,  0,  0,   0,  0,  0,  0,    0,   0,     0},
     {WINED3DFMT_INST,                       0,  0,  0,  0,   0,  0,  0,  0,    0,   0,     0},
     {WINED3DFMT_INTZ,                       0,  0,  0,  0,   0,  0,  0,  0,    4,  24,     8},
+    {WINED3DFMT_RESZ,                       0,  0,  0,  0,   0,  0,  0,  0,    0,   0,     0},
     {WINED3DFMT_NVHU,                       0,  0,  0,  0,   0,  0,  0,  0,    2,   0,     0},
     {WINED3DFMT_NVHS,                       0,  0,  0,  0,   0,  0,  0,  0,    2,   0,     0},
     {WINED3DFMT_NULL,                       8,  8,  8,  8,   0,  8, 16, 24,    4,   0,     0},
@@ -1712,6 +1713,15 @@ static void apply_format_fixups(struct wined3d_adapter *adapter, struct wined3d_
         gl_info->formats[idx].flags |= WINED3DFMT_FLAG_TEXTURE;
     }
 
+    /* RESZ aka AMD DX9-level hack for multisampled depth buffer resolve. You query for RESZ
+     * support by checking for availability of MAKEFOURCC('R','E','S','Z') surfaces with
+     * RENDERTARGET usage. */
+    if (gl_info->supported[ARB_FRAMEBUFFER_OBJECT])
+    {
+        idx = getFmtIdx(WINED3DFMT_RESZ);
+        gl_info->formats[idx].flags |= WINED3DFMT_FLAG_TEXTURE | WINED3DFMT_FLAG_RENDERTARGET;
+    }
+
     for (i = 0; i < sizeof(formats) / sizeof(*formats); ++i)
     {
         struct wined3d_format *format = &gl_info->formats[idx];
@@ -1975,6 +1985,7 @@ const char *debug_d3dformat(enum wined3d_format_id format_id)
         FMT_TO_STR(WINED3DFMT_B8G8R8A8_UNORM);
         FMT_TO_STR(WINED3DFMT_B8G8R8X8_UNORM);
         FMT_TO_STR(WINED3DFMT_INTZ);
+        FMT_TO_STR(WINED3DFMT_RESZ);
         FMT_TO_STR(WINED3DFMT_NULL);
         FMT_TO_STR(WINED3DFMT_R16);
         FMT_TO_STR(WINED3DFMT_AL16);
diff --git a/include/wine/wined3d.h b/include/wine/wined3d.h
index 723d9385cc8..378a46bee9d 100644
--- a/include/wine/wined3d.h
+++ b/include/wine/wined3d.h
@@ -245,6 +245,7 @@ enum wined3d_format_id
     WINED3DFMT_NVHU                         = WINEMAKEFOURCC('N','V','H','U'),
     WINED3DFMT_NVHS                         = WINEMAKEFOURCC('N','V','H','S'),
     WINED3DFMT_INTZ                         = WINEMAKEFOURCC('I','N','T','Z'),
+    WINED3DFMT_RESZ                         = WINEMAKEFOURCC('R','E','S','Z'),
     WINED3DFMT_NULL                         = WINEMAKEFOURCC('N','U','L','L'),
     WINED3DFMT_R16                          = WINEMAKEFOURCC(' ','R','1','6'),
     WINED3DFMT_AL16                         = WINEMAKEFOURCC('A','L','1','6'),
@@ -1216,6 +1217,8 @@ enum wined3d_display_rotation
 #define WINED3D_LEGACY_DEPTH_BIAS                               0x00000001
 #define WINED3D_NO3D                                            0x00000002
 
+#define WINED3D_RESZ_CODE                                       0x7fa05000
+
 /* dwDDFX */
 /* arithmetic stretching along y axis */
 #define WINEDDBLTFX_ARITHSTRETCHY                               0x00000001
-- 
2.11.4.GIT